FIBK Insider Trading - First Interstate BancSystem, Inc.

Shares Outstanding	104,856,752 shares
Insider Shares	16,489,418 shares
Insider Ownership	15.70 %
Total Insiders	85

Insider Sentiment Score

The Insider Sentiment Score finds the companies being bought by corporate insiders.

It is the result of a sophisticated, multi-factor quantitative model that identifies companies with the highest levels of insider accumulation. The scoring model uses a combination of the net number of insiders buying the prior 90 days, the total shares bought as a percentage of float, and the total shares owned by insiders. The number ranges from 0 to 100, with higher numbers indicating a higher level of accumulation to its peers, and 50 being the average.

Update Frequency: Daily

See Insiders Top Picks, which provides a list of companies with highest insider accumulation.

See Highest Ranking Stocks

Officer Sentiment Score

The Officer Sentiment Score finds companies being bought by Corporate Officers.

By definition Corporate Officers are Corporate Insiders, but unlike some of the other Insiders (10% Shareholders and Board Members), Officers work for the company on a daily basis, and they user their own money when trading. (10% Shareholders and Board Members are often fund managers managing other people’s money.) As such, insider trades made by Officers are much more significant and should be treated appropriately.

Like the Insider Sentiment Score, the Officer Sentiment Score is the result of a sophisticated, multi-factor quantitative model that identifies companies with the highest levels of officer accumulation.

Update Frequency: Daily

See Insiders Top Picks, which provides a list of companies with highest insider sentiment.

See Highest Ranking Stocks

Key Insider Metrics

This card shows how the company ranks along various insider metrics. The percentile rank shows how this company compares to other companies in the US markets. Higher rankings are indicative of better situations.

For example, it is generally accepted that insider buying is a positive indicator, so companies with more insider buying would rank higher than companies with less insider buying (or even insider selling).

Net Number of Insiders Buying (Rank)

-2 ( )

10398 out of 11323

Net Number of Insiders Buying is the total number of insiders buying minus the total number of insiders selling in the last 90 days. The percentile rank is shown here (range from 0 to 100%).

Percent of Float Bought by Insiders (Rank)

-0.156 %( )

10708 out of 11244

Percent of Float Bought by Insiders is the total number of shares purchased by insiders minus the total number of shares sold by insiders in the last 90 days, divided by the total float and multiplied by 100.

Insider Trading Chart

First Interstate BancSystem, Inc. insider trades are shown in the following chart. Insiders are officers, directors, or significant investors in a company. In general, it is generally illegal for insiders to make trades in their companies based on material, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4.

Insider Roster and Profitability Metrics

This table shows the list known insiders, and is generated automatically from filings disclosed to the SEC. In addition to the names, most recent title, and director, officer, or 10% owner designation, we provide the latest disclosed holdings. Additionally, when possible we provide the historical trade performance for the insider. The historical trade performance is a weighted average of the performance of actual open-market purchase transactions made by the insider. For more information on how this is calculated, watch this YouTube webinar.

See our leaderboard of most profitable insider traders.

Insider	Shares Owned	Split Adjusted
Renu Agrawal Director - [D]	0	0
Lorrie Asker Chief Banking Officer - [O]	19,708	19,708
James Brannen Director - [D]	11,786	11,786
Biff Bowman Director - [D]	19,682	19,682
David R Calahan Regional Pres., Bank Sub. - [O]	5,034	5,034
Elouis C Cobell	600
David H Crum Director - [D]	79,098	79,098
Julie G Castle President, Financial Services - [O]	461	461
Robert M Cerkovnik Sr VP & Chief Credit Officer - [O]	22,787	22,787
Alice S Cho Director - [D]	13,545	13,545
Steven J Corning Director - [D]	27,181	27,181
Dana L Crandall Director - [D]	9,712	9,712
Camera David Della Chief Financial Officer - [O]	21,706	21,706
William B Ebzery Director - [D]	31,000	31,000
Scott Edward Erkonen EVP, Chief Information Officer - [O]	13,506	13,506
Exempt Thomas W Scott Marital Trust 2 10% Owner - [10%]	548,256	1,183,100
First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020 10% Owner - [10%]	0	78,545
Ed Garding Pres. & CEO - [O]	123,285	123,285
Kevin Guenthner SVP & Chief Infor. Officer - [O]	17,088	17,088
Philip G Gaglia Chief Risk Officer - [O]	1,687	1,687
Gottwals William D. EVP and Chief Banking Officer - [O]	8,362	8,362
Frances Pallas Grieb Director - [D]	25,450	25,450
James W Haugh Director - [D]	0	0
Thomas Edward Henning Director - [D]	27,066	27,066
John M Jr Heyneman Director, 10% Owner - [D] [10%]	1,419,860	1,419,860
Michael John Hickey Regional President - Bank Sub - [O]	83	83
Charles E Hart Director - [D]	26,285	26,285
Ashley Hayslip EVP, Chief Banking Officer - [O]	4,487	4,487

Insider	Shares Owned	Split Adjusted
Charles M Heyneman Director - [D]	5,706	5,706
Susan Scott Heyneman 10% Owner - [10%]	639,256	639,256
Holland Elizabeth Scott Trust 10% Owner - [10%]	297,439	958,710
Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co Trustees 10% Owner - [10%]	950,753	950,753
Jodi Delahunt Hubbell Chief Operating Officer - [O]	20,374	20,374
William A Huppert Regional President, Bank Sub - [O]	3,173	3,173
Huston Michael G. Ex. VP & Chief Banking Officer - [O]	8,636	8,636
J.S. Investments Limited Partnership 10% Owner - [10%]	1,901,036	4,388,016
David L Jahnke Director - [D]	31,501	31,501
James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees 10% Owner - [10%]	93,567	4,388,016
R & Christine M Scott Foundation James 10% Owner - [10%]	4,426,760	4,388,016
Kirk D Jensen General Counsel - [O]	30,155	30,155
Dennis L Johnson Director - [D]	17,208	17,208
Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 10% Owner - [10%]	14,425	958,710
Nathan R Jones Chief Risk Officer - [O]	0	0
Karlyn M Knieriem EVP, Chief Risk Officer - [O]	25,171	25,171
Stephen Mark Lacy Director - [D]	22,834	22,834
Leckie Ross E. Director - [D]	9,734	9,734
Russell A Lee EVP & Chief Banking Officer - [O]	4,771	4,771
Terrill R Moore Exec. Vice President & CFO - [O]	59,788	59,788
Patricia L Moss Director - [D]	16,062	16,062
Lori Meyer EVP, Chief Information Officer - [O]	12,808	12,808
Marcy D Mutch Exec. Vice Pres. & CFO - [O]	69,608	69,608
Nbar5 S, Lp 10% Owner - [10%]	0	2,946
Renee Newman EVP and Chief Strategy Officer - [O]	4,321	4,321
Terry W Payne Director - [D]	3,465	3,465
Kade G Peterson Chief Information Officer - [O]	4,922	4,922
Joyce Ann Phillips Director - [D]	12,352	12,352

Insider	Shares Owned	Split Adjusted
Kevin P Riley President & CEO, Director - [D] [O]	523	523
Daniel A Rykhus Director - [D]	29,110	29,110
James A Reuter President and CEO, Director - [D] [O]	60,637	60,637
Risa K. Scott & John Heyneman Jr., TTEEs FBO Risa K Scott Exemption Trust Under the Scott Family 1996 Trust 10% Owner - [10%]	0	322,546
Kristina Robbins EVP, Chief Operations Officer - [O]	16,084	16,084
Dan S Scott	1,209,039
Homer A Jr Scott 10% Owner - [10%]	1,956,713	1,956,713
James R Scott Director, 10% Owner - [D] [10%]	4,388,016	4,388,016
Julie A Scott 10% Owner - [10%]	613,019	613,019
Randall I Scott Director, 10% Owner - [D] [10%]	1,620	1,620
Thomas W Scott 10% Owner - [10%]	2,641,907	2,641,907
Michael L Scudder Director - [D]	1,879	1,879
Michael J/co Sullivan Director - [D]	4,374	4,374
Sandra A Scott Suzor 10% Owner - [10%]	103,011	103,011
Geoffrey D Scott 10% Owner - [10%]	1,650	1,650
Scott James R. Jr Director, 10% Owner - [D] [10%]	78,545	78,545
Jeremy Scott Director, 10% Owner - [D] [10%]	3,515,395	3,515,395
Jonathan R Scott Director, 10% Owner - [D] [10%]	958,710	958,710
Risa Kae Scott 10% Owner - [10%]	322,546	322,546
Stadium Foundation Sheridan 10% Owner - [10%]	0	1,956,713
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees 10% Owner - [10%]	519,256	519,256
Teresa Taylor Director - [D]	7,846	7,846
Thomas W Scott Trust Dtd 8/22/95, Thomas W Scott Trustee 10% Owner - [10%]	573,956	2,641,907
Towanda Investments Limited Partnership 10% Owner - [10%]	1,403,322	1,419,860
Steven E Wheeler Branch Administration Officer - [O]	3,703	3,703
Martin A White Director - [D]	206	206
Theodore H Williams Director - [D]	11,152	11,152
Peter I Wold Director - [D]	3,707	3,707
Yose Stephen W. EVP & Chief Credit Officer - [O]	10,259	10,259

Report errors via our new Insider Auditing Tool

Track Records of Insider Purchases - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in FIBK / First Interstate BancSystem, Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical .

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Max	Price at Max	Max Profit ($)	Max Return (%)
2024-08-01	RILEY KEVIN P	61	29.9300	61	29.9300	1,826	116	35.4700	339	18.56
2024-08-01	RILEY KEVIN P	108	29.8800	108	29.8800	3,227
2024-08-01	RILEY KEVIN P	146	29.9100	146	29.9100	4,367
2024-08-01	RILEY KEVIN P	146	29.9000	146	29.9000	4,365
2024-08-01	RILEY KEVIN P	98	29.8800	98	29.8800	2,928
2024-08-01	RILEY KEVIN P	3,830	29.9400	3,830	29.9400	114,670
2024-08-01	RILEY KEVIN P	23	29.8500	23	29.8500	687
2024-07-31	RILEY KEVIN P	6,820	31.6200	6,820	31.6200	215,648
2023-06-14	RILEY KEVIN P	1,400	25.8500	1,400	25.8500	36,190

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

FIBK / First Interstate BancSystem, Inc. Insider Trades

Track Records of Insider Sales - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in FIBK / First Interstate BancSystem, Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical .

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date	Insider	Reported Shares	Reported Price	Adjusted Shares	Adjusted Price	Cost Basis	Days to Min	Price at Min	Max Loss Avoided ($)	Max Loss Avoided (%)
2025-09-02	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	10,000	32.2800	10,000	32.2800	322,800	1	32.4800	2,000	0.62
2025-08-14	HEYNEMAN JOHN M JR	11,818	30.1850	11,818	30.1850	356,726
2025-08-01	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	55,000	27.8600	55,000	27.8600	1,532,300
2025-07-14	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	55,000	31.1100	55,000	31.1100	1,711,050
2025-02-26	HEYNEMAN JOHN M JR	250	30.5200	250	30.5200	7,630
2025-02-14	HEYNEMAN JOHN M JR	1,335	32.5600	1,335	32.5600	43,468
2024-11-22	Scott James R. Jr	6,067	34.5000	6,067	34.5000	209,312
2024-11-13	Scott Jonathan R	6,500	34.1800	6,500	34.1800	222,170
2024-11-12	SCOTT JULIE A	22,050	33.8000	22,050	33.8000	745,290

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

Transaction History

Click the link icon to see the full transaction history. Transactions reported as part of a 10b5-1 automatic trading plan will have an X in the column marked 10b-5.

File Date	Trade Date	Form	Insider	Ticker	Security Title	Code	Direct	Exercise Price	Unit Price	Units Changed	Value Changed (1K)	Remaining Options	Remaining Shares
2025-09-05	2025-09-03	4	Scott Jeremy	FIBK	Common Stock	G - Gift	I			22,928			3,512,233
2025-09-05	2025-08-05	4	Scott Jeremy	FIBK	Common Stock	L - Other	I			216			3,512,449
2025-09-05		3	Agrawal Renu	FIBK	Common Stock		D						0
2025-09-02	2025-09-02	4	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	FIBK	Common Stock	S - Sale	I		32.2800	-10,000	-323		519,256
2025-08-29	2025-08-27	4	SCUDDER MICHAEL L	FIBK	Common Stock	A - Award	D		31.9300	1,879	60		1,879
2025-08-21		3	SCUDDER MICHAEL L	FIBK	Common Stock		D						0
2025-08-18	2025-08-14	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	S - Sale	D		30.1850	-11,818	-357		5,224
2025-08-01	2025-08-01	4	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	FIBK	Common Stock	S - Sale	I		27.8600	-55,000	-1,532		529,256
2025-07-18	2024-12-05	5	Scott Jeremy	FIBK	Common Stock	G - Gift	I			475			3,489,305
2025-07-18	2024-12-05	5	Scott Jeremy	FIBK	Common Stock	G - Gift	I			475			3,489,305
2025-07-15	2025-07-14	4	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	FIBK	Common Stock	S - Sale	I		31.1100	-55,000	-1,711		584,256
2025-06-05		3/A	Della Camera David	FIBK	Common Stock		D						21,706
2025-06-04		3	Della Camera David	FIBK	Common Stock		D						3,186
2025-06-03	2025-06-01	4	Bowman Biff	FIBK	Common Stock	A - Award	D			4,788			19,682
2025-06-03	2025-06-01	4	Scott James R. Jr	FIBK	Common Stock	A - Award	D			2,946			78,545
2025-06-03	2025-06-01	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	A - Award	D			2,946			17,042
2025-06-03	2025-06-01	4	Scott Jeremy	FIBK	Common Stock	A - Award	D			2,946			2,946
2025-06-03	2025-06-01	4	Phillips Joyce Ann	FIBK	Common Stock	A - Award	D			2,946			12,352
2025-06-03	2025-06-01	4	Lacy Stephen Mark	FIBK	Common Stock	A - Award	D			2,946			22,834
2025-06-03	2025-06-01	4	MOSS PATRICIA L	FIBK	Common Stock	A - Award	D			2,946			16,062
2025-06-03	2025-06-01	4	Johnson Dennis L	FIBK	Common Stock	A - Award	D			2,946			17,208
2025-06-03	2025-06-01	4	RYKHUS DANIEL A	FIBK	Common Stock	A - Award	D			4,050			29,110
2025-06-03	2025-06-01	4	Jahnke David L	FIBK	Common Stock	A - Award	D			2,946			31,501
2025-06-03	2025-06-01	4	Cho Alice S	FIBK	Common Stock	A - Award	D			2,946			13,545
2025-05-30	2025-03-17	4	Scott James R. Jr	FIBK	Common Stock	F - Taxes	D		29.4100	-69	-2		75,599
2025-05-30	2025-03-17	4	Scott James R. Jr	FIBK	Common Stock	F - Taxes	D		29.4100	-23	-1		77,345
2025-05-30	2025-03-15	4	Scott James R. Jr	FIBK	Common Stock	A - Award	D			1,213			77,368
2025-05-30	2024-03-20	4	Scott James R. Jr	FIBK	Common Stock	F - Taxes	D		25.2100	-23	-1		76,155
2025-05-30	2024-03-15	4	Scott James R. Jr	FIBK	Common Stock	A - Award	D			599			76,178
2025-05-30	2023-05-24	4	Scott James R. Jr	FIBK	Common Stock	A - Award	D			192			75,579
2025-05-29	2025-05-28	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		26.7900	-258	-7		16,084
2025-04-29		3	Jones Nathan R	FIBK	Common Stock		D						0
2025-03-18	2025-03-17	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		29.1400	-494	-14		16,342
2025-03-18	2025-03-17	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		29.1400	-309	-9		16,836
2025-03-18	2025-03-17	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		29.1400	-389	-11		17,145
2025-03-18	2025-03-17	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		29.1400	-151	-4		17,534
2025-03-18	2025-03-15	4	Robbins Kristina	FIBK	Common Stock	A - Award	D			4,465			17,685
2025-03-18	2025-03-15	4	Reuter James A	FIBK	Common Stock	A - Award	D			34,663			60,637
2025-03-18	2025-03-15	4	Mutch Marcy D	FIBK	Common Stock	A - Award	D			7,861			69,608
2025-03-18	2025-03-17	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		29.1400	-423	-12		12,808
2025-03-18	2025-03-17	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		29.1400	-76	-2		13,231
2025-03-18	2025-03-17	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		29.1400	-156	-5		13,307
2025-03-18	2025-03-17	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		29.1400	-71	-2		13,463
2025-03-18	2025-03-15	4	Meyer Lori	FIBK	Common Stock	A - Award	D			3,204			13,534
2025-03-18	2025-03-17	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		29.1400	-581	-17		30,155
2025-03-18	2025-03-17	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		29.1400	-363	-11		30,736
2025-03-18	2025-03-17	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		29.1400	-528	-15		31,099
2025-03-18	2025-03-17	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		29.1400	-230	-7		31,627
2025-03-18	2025-03-15	4	Jensen Kirk D	FIBK	Common Stock	A - Award	D			4,404			31,857
2025-03-18	2025-03-17	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		29.1400	-846	-25		19,708
2025-03-18	2025-03-17	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		29.1400	-257	-7		20,554
2025-03-18	2025-03-17	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		29.1400	-318	-9		20,811
2025-03-18	2025-03-17	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		29.1400	-129	-4		21,129
2025-03-18	2025-03-15	4	Asker Lorrie	FIBK	Common Stock	A - Award	D			6,712			21,258
2025-02-26	2025-02-26	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	S - Sale	I		30.5200	-250	-8		1,414,636
2025-02-18	2025-02-14	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	S - Sale	I		32.5600	-1,335	-43		1,414,886
2025-02-14	2024-10-30	4	Scott Risa Kae	FIBK	Common Stock	G - Gift	I			-3,210			322,546
2025-02-11	2025-02-10	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		32.2000	-324	-10		14,546
2025-02-10	2025-02-06	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	G - Gift	I			1,070			1,416,221
2025-02-10	2025-02-06	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	G - Gift	D			-1,070			14,096
2024-12-13	2024-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			727			4,388,016
2024-12-13	2024-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			727			4,388,016
2024-12-13	2024-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			-727			4,387,289
2024-12-13	2024-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			-727			4,387,289
2024-11-25	2024-11-22	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		34.5000	-6,067	-209		75,387
2024-11-14	2024-11-13	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		34.1800	-6,500	-222		958,710
2024-11-14	2024-11-12	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		33.8000	-22,050	-745		965,210
2024-11-12	2024-11-12	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		33.8000	-22,050	-745		613,019
2024-11-12	2024-11-08	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		32.7800	-20,220	-663		635,069
2024-11-08	2024-11-07	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		32.7700	-15,150	-496		655,289
2024-11-08	2024-11-06	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		34.3100	-3,000	-103		670,439
2024-11-05	2024-11-01	4	Reuter James A	FIBK	Common Stock	A - Award	D			25,974			25,974
2024-08-27	2024-08-23	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	S - Sale	I		30.5900	-550	-17		1,415,151
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 6	FIBK	Common Stock	P - Purchase	I		29.8500	23	1		523
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 5	FIBK	Common Stock	P - Purchase	I		29.9300	61	2		811
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 4	FIBK	Common Stock	P - Purchase	I		29.8800	108	3		1,118
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Common Stock	P - Purchase	I		29.9100	146	4		1,436
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Common Stock	P - Purchase	I		29.9000	146	4		1,436
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Common Stock	P - Purchase	I		29.8800	98	3		1,448
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Common Stock	G - Gift	I			250			250
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Common Stock	G - Gift	I			250			250
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 7	FIBK	Common Stock	G - Gift	I			250			250
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 6	FIBK	Common Stock	G - Gift	I			250			500
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 5	FIBK	Common Stock	G - Gift	I			250			750
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA - 4	FIBK	Common Stock	G - Gift	I			250			1,010
2024-08-02	2024-08-01	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Common Stock	G - Gift	I			250			1,290
2024-08-02	2024-08-01	4	RILEY KEVIN P	FIBK	Common Stock	G - Gift	D			-6,750			75,762
2024-08-02	2024-08-01	4	RILEY KEVIN P	FIBK	Common Stock	S - Sale	D		29.8100	-7,300	-218		82,512
2024-08-02	2024-08-01	4	RILEY KEVIN P By IRA	FIBK	Common Stock	P - Purchase	I		29.9400	3,830	115		117,655
2024-08-02	2024-07-31	4	RILEY KEVIN P By IRA	FIBK	Common Stock	P - Purchase	I		31.6200	6,820	216		113,825
2024-08-01	2024-07-31	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	G - Gift	I			2,300			1,415,701
2024-08-01	2024-07-31	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	G - Gift	D			-2,300			15,166
2024-07-31	2024-07-30	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		31.6000	-20,000	-632		987,260
2024-06-13	2024-06-12	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		26.1400	-14,403	-376		1,007,260
2024-06-13	2024-06-11	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		25.2900	-29,499	-746		1,021,663
2024-06-13	2024-06-12	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		26.1400	-102,430	-2,678		727,439
2024-06-13	2024-06-11	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		25.2900	-209,831	-5,307		879,869
2024-06-04	2024-06-01	4	SCOTT JAMES R	FIBK	Common Stock	A - Award	D			3,014			21,333
2024-06-04	2024-06-01	4	HEYNEMAN JOHN M JR	FIBK	Common Stock	A - Award	D			3,014			17,466
2024-06-04	2024-06-01	4	Scott Jonathan R	FIBK	Common Stock	A - Award	D			3,579			14,114
2024-06-04	2024-06-01	4	Johnson Dennis L	FIBK	Common Stock	A - Award	D			3,014			14,262
2024-06-04	2024-06-01	4	Lacy Stephen Mark	FIBK	Common Stock	A - Award	D			3,014			19,888
2024-06-04	2024-06-01	4	Grieb Frances Pallas	FIBK	Common Stock	A - Award	D			3,014			25,450
2024-06-04	2024-06-01	4	Jahnke David L	FIBK	Common Stock	A - Award	D			3,014			28,555
2024-06-04	2024-06-01	4	MOSS PATRICIA L	FIBK	Common Stock	A - Award	D			3,014			13,116
2024-06-04	2024-06-01	4	Bowman Biff	FIBK	Common Stock	A - Award	D			6,781			14,894
2024-06-04	2024-06-01	4	HENNING THOMAS EDWARD	FIBK	Common Stock	A - Award	D			3,014			27,066
2024-06-04	2024-06-01	4	Cho Alice S	FIBK	Common Stock	A - Award	D			3,014			10,599
2024-06-04	2024-06-01	4	RYKHUS DANIEL A	FIBK	Common Stock	A - Award	D			3,014			25,060
2024-06-04	2024-06-01	4	Phillips Joyce Ann	FIBK	Common Stock	A - Award	D			3,014			9,406
2024-06-03		3	Scott Geoffrey D By spouse	FIBK	Class A Common Stock		I						1,650
2024-06-03		3	Scott Geoffrey D	FIBK	Class A Common Stock		D						89,756
2024-05-29	2024-05-28	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		26.5000	-257	-7		13,220
2024-05-15	2024-05-14	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		27.5500	-27,000	-744		776,022
2024-05-15	2024-05-14	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		27.5500	-27,000	-744		776,022
2024-05-15	2024-05-14	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		27.5500	-110,000	-3,030		830,022
2024-03-26	2024-03-15	4/A	Robbins Kristina	FIBK	Common Stock	A - Award	D			5,051			13,477
2024-03-26	2024-03-15	4/A	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		25.2100	-329	-8		8,426
2024-03-26	2024-03-15	4/A	KNIERIEM KARLYN M	FIBK	Common Stock	A - Award	D			5,092			25,171
2024-03-26	2024-03-15	4/A	KNIERIEM KARLYN M	FIBK	Common Stock	F - Taxes	D		25.2100	-304	-8		20,079
2024-03-26	2024-03-15	4/A	KNIERIEM KARLYN M	FIBK	Common Stock	F - Taxes	D		25.2100	-216	-5		20,383
2024-03-26	2024-03-15	4/A	Mutch Marcy D	FIBK	Common Stock	A - Award	D			10,359			61,747
2024-03-26	2024-03-15	4/A	Mutch Marcy D	FIBK	Common Stock	F - Taxes	D		25.2100	-678	-17		51,388
2024-03-26	2024-03-15	4/A	Mutch Marcy D	FIBK	Common Stock	F - Taxes	D		25.2100	-452	-11		52,066
2024-03-26	2024-03-15	4/A	Mutch Marcy D	FIBK	Common Stock	F - Taxes	D		25.2100	-288	-7		52,518
2024-03-26	2024-03-15	4/A	Jensen Kirk D	FIBK	Common Stock	A - Award	D			5,934			27,453
2024-03-26	2024-03-15	4/A	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		25.2100	-356	-9		21,519
2024-03-26	2024-03-15	4/A	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		25.2100	-242	-6		21,875
2024-03-26	2024-03-15	4/A	Asker Lorrie	FIBK	Common Stock	A - Award	D			8,443			14,870
2024-03-26	2024-03-15	4/A	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.2100	-258	-7		6,427
2024-03-26	2024-03-15	4/A	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.2100	-129	-3		6,685
2024-03-26	2024-03-15	4/A	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.2100	-95	-2		6,814
2024-03-19	2024-03-15	4	KNIERIEM KARLYN M	FIBK	Common Stock	A - Award	D			5,092			25,084
2024-03-19	2024-03-15	4	KNIERIEM KARLYN M	FIBK	Common Stock	F - Taxes	D		25.2100	-367	-9		19,992
2024-03-19	2024-03-15	4	KNIERIEM KARLYN M	FIBK	Common Stock	F - Taxes	D		25.2100	-240	-6		20,359
2024-03-19	2024-03-15	4	Mutch Marcy D	FIBK	Common Stock	A - Award	D			10,359			61,633
2024-03-19	2024-03-15	4	Mutch Marcy D	FIBK	Common Stock	F - Taxes	D		25.2100	-668	-17		51,274
2024-03-19	2024-03-15	4	Mutch Marcy D	FIBK	Common Stock	F - Taxes	D		25.2100	-524	-13		51,942
2024-03-19	2024-03-15	4	Mutch Marcy D	FIBK	Common Stock	F - Taxes	D		25.2100	-340	-9		52,466
2024-03-19	2024-03-15	4	RILEY KEVIN P	FIBK	Common Stock	A - Award	D			39,111			89,812
2024-03-19	2024-03-15	4	RILEY KEVIN P	FIBK	Common Stock	F - Taxes	D		25.2100	-2,949	-74		50,701
2024-03-19	2024-03-15	4	RILEY KEVIN P	FIBK	Common Stock	F - Taxes	D		25.2100	-1,871	-47		53,650
2024-03-19	2024-03-15	4	RILEY KEVIN P	FIBK	Common Stock	F - Taxes	D		25.2100	-906	-23		55,521
2024-03-19	2024-03-15	4	RILEY KEVIN P	FIBK	Common Stock	F - Taxes	D		25.2100	-229	-6		56,427
2024-03-19	2024-03-15	4	Robbins Kristina	FIBK	Common Stock	A - Award	D			5,051			13,441
2024-03-19	2024-03-15	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		25.2100	-365	-9		8,390
2024-03-19	2024-03-15	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		25.2100	-178	-4		8,755
2024-03-19	2024-03-15	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		25.2100	-114	-3		8,933
2024-03-19	2024-03-15	4	Jensen Kirk D	FIBK	Common Stock	A - Award	D			5,934			27,351
2024-03-19	2024-03-15	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		25.2100	-428	-11		21,417
2024-03-19	2024-03-15	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		25.2100	-272	-7		21,845
2024-03-19	2024-03-15	4	Jensen Kirk D	FIBK	Common Stock	F - Taxes	D		25.2100	-159	-4		22,117
2024-03-19	2024-03-15	4	Meyer Lori	FIBK	Common Stock	A - Award	D			4,317			10,330
2024-03-19	2024-03-15	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		25.2100	-89	-2		6,013
2024-03-19	2024-03-15	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		25.2100	-83	-2		6,102
2024-03-19	2024-03-15	4	Meyer Lori	FIBK	Common Stock	F - Taxes	D		25.2100	-46	-1		6,185
2024-03-19	2024-03-15	4	Asker Lorrie	FIBK	Common Stock	A - Award	D			8,443			14,782
2024-03-19	2024-03-15	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.2100	-304	-8		6,339
2024-03-19	2024-03-15	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.2100	-152	-4		6,643
2024-03-19	2024-03-15	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.2100	-114	-3		6,795
2024-03-08	2024-03-07	4	KNIERIEM KARLYN M	FIBK	Common Stock	S - Sale	D		26.7600	-2,900	-78		20,599
2024-03-07	2024-03-06	4	Asker Lorrie	FIBK	Common Stock	S - Sale	D		26.0500	-1,921	-50		6,909
2024-02-20	2024-02-15	4	KNIERIEM KARLYN M	FIBK	Common Stock	F - Taxes	D		26.7800	-620	-17		23,499
2024-02-14	2023-11-16	5	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Common Stock	L - Other	I		26.0100	20	1		1,100
2024-02-14	2023-08-17	5	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Common Stock	L - Other	I		27.0800	18	0		1,080
2024-02-14	2023-05-18	5	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Common Stock	L - Other	I		22.4500	22	0		1,062
2024-02-12	2024-02-09	4	Asker Lorrie	FIBK	Common Stock	F - Taxes	D		25.5400	-325	-8		8,830
2024-02-08	2024-02-07	4	Robbins Kristina	FIBK	Common Stock	S - Sale	D		25.8300	-2,710	-70		9,047
2024-01-02	2023-12-13	5	Scott Jeremy Trust	FIBK	Common Stock	G - Gift	I			575			69,892
2024-01-02	2022-12-07	5	Scott Jeremy Trust	FIBK	Common Stock	G - Gift	I			375			69,317
2023-12-19	2023-12-08	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		28.4200	-10,000	-284		1,149,700
2023-12-19	2023-11-30	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		26.1900	-10,000	-262		1,159,700
2023-12-15	2023-12-14	4	Homer Scott Jr Trust, Homer Scott Jr. & First Interstate Wealth Management Co Trustees	FIBK	Common Stock	S - Sale	I		32.1400	-1,000,000	-32,140		950,753
2023-12-13	2023-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			925			4,388,017
2023-12-13	2023-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			925			4,388,017
2023-12-13	2023-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			-925			4,387,092
2023-12-13	2023-12-11	4	SCOTT JAMES R	FIBK	Common Stock	G - Gift	I			-925			4,387,092
2023-12-06		3	Meyer Lori	FIBK	Common Stock		D						6,231
2023-12-06		3	Meyer Lori 401k	FIBK	Common Stock		I						1,232
2023-10-27	2023-10-27	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		23.3500	-13,400	-313		1,169,700
2023-09-18	2023-09-14	4	RILEY KEVIN P	FIBK	Common Stock	G - Gift	D			-5,000			57,956
2023-09-14	2023-09-13	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		24.8500	-29,000	-721		1,051,162
2023-09-14	2023-09-13	4	Scott Jonathan R	FIBK	Common Stock	S - Sale	I		24.9200	-15,000	-374		1,080,162
2023-09-14	2023-09-11	4	Scott Jonathan R	FIBK	Common Stock	G - Gift	I			140,491			1,095,162
2023-09-13	2023-09-13	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		25.0900	-20,000	-502		1,183,100
2023-09-13	2023-09-12	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		25.0400	-11,928	-299		1,203,100
2023-09-13	2023-09-11	4	SCOTT JULIE A	FIBK	Common Stock	S - Sale	I		24.9600	-8,072	-201		1,215,028
2023-09-13	2023-09-11	4	SCOTT JULIE A	FIBK	Common Stock	G - Gift	I			238,538			1,223,100
2023-09-13	2023-09-11	4	SCOTT JULIE A	FIBK	Common Stock	G - Gift	I			-1,392,289			984,562
2023-09-06	2023-09-05	4	SCOTT HOMER A JR	FIBK	Common Stock	G - Gift	I			-4,000			1,956,713
2023-06-15	2023-06-13	4	SCOTT JULIE A	FIBK	Class A Common Stock	G - Gift	I			2			2,376,851
2023-06-15	2023-06-13	4	SCOTT JULIE A	FIBK	Class A Common Stock	G - Gift	I			-2			2,376,851
2023-06-15	2023-06-14	4	RILEY KEVIN P By IRA	FIBK	Common Stock	P - Purchase	I		25.8500	1,400	36		105,705
2023-06-15	2023-06-14	4	RILEY KEVIN P By IRA	FIBK	Common Stock	P - Purchase	I		25.8900	1,200	31		104,305
2023-06-15	2023-06-14	4	RILEY KEVIN P By IRA	FIBK	Common Stock	P - Purchase	I		26.1100	10,550	275		103,105
2023-06-15	2023-06-14	4	RILEY KEVIN P	FIBK	Common Stock	G - Gift	D			-10,000			62,956
2023-06-15	2023-06-13	4	Scott Jonathan R	FIBK	Class A Common Stock	G - Gift	I			1			954,671
2023-06-05	2023-06-01	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D			5,668			18,319
2023-06-05	2023-06-01	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D			4,534			10,535
2023-06-05	2023-06-01	4	Bowman Biff	FIBK	Class A Common Stock	A - Award	D			4,534			8,113
2023-06-05	2023-06-01	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D			5,668			25,541
2023-06-05	2023-06-01	4	Phillips Joyce Ann	FIBK	Class A Common Stock	A - Award	D			3,401			6,392
2023-06-05	2023-06-01	4	BRANNEN JAMES	FIBK	Class A Common Stock	A - Award	D			3,401			11,786
2023-06-05	2023-06-01	4	Lacy Stephen Mark	FIBK	Class A Common Stock	A - Award	D			3,401			16,874
2023-06-05	2023-06-01	4	Grieb Frances Pallas	FIBK	Class A Common Stock	A - Award	D			3,401			22,436
2023-06-05	2023-06-01	4	RYKHUS DANIEL A	FIBK	Class A Common Stock	A - Award	D			3,401			22,046
2023-06-05	2023-06-01	4	HENNING THOMAS EDWARD	FIBK	Class A Common Stock	A - Award	D			3,401			24,052
2023-06-05	2023-06-01	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D			3,401			11,248
2023-06-05	2023-06-01	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D			3,401			10,102
2023-06-05	2023-06-01	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D			3,401			24,531
2023-06-05	2023-06-01	4	Cho Alice S	FIBK	Class A Common Stock	A - Award	D			3,401			7,585
2023-05-31	2023-05-28	4	Robbins Kristina	FIBK	Common Stock	F - Taxes	D		23.0700	-266	-6		11,757
2023-05-24	2023-05-24	4	Jensen Kirk D	FIBK	Common Stock	A - Award	D			3,704			22,276
2023-05-24	2023-05-24	4	Robbins Kristina	FIBK	Common Stock	A - Award	D			3,153			12,023
2023-05-24	2023-05-24	4	Asker Lorrie	FIBK	Common Stock	A - Award	D			2,566			9,155
2023-05-24	2023-05-24	4	ERKONEN SCOTT EDWARD	FIBK	Common Stock	A - Award	D			2,791			13,506
2023-05-24	2023-05-24	4	RILEY KEVIN P	FIBK	Common Stock	A - Award	D			30,137			72,956
2023-05-24	2023-05-24	4	Mutch Marcy D	FIBK	Common Stock	A - Award	D			6,929			52,806
2023-05-24	2023-05-24	4	KNIERIEM KARLYN M	FIBK	Common Stock	A - Award	D			3,179			23,934
2023-05-24	2023-05-24	4	SCOTT HOMER A JR	FIBK	Common Stock	G - Gift	I			-1,750			1,960,713
2023-05-19	2023-05-17	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		23.0700	-23,250	-536		954,670
2023-05-18	2023-05-17	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		23.0700	-62,223	-1,435		2,376,851
2023-05-09	2023-05-08	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-10,000			42,819
2023-05-09	2023-05-08	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		23.1400	-3,000	-69		977,920
2023-05-09	2023-05-05	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		23.2700	-26,250	-611		980,920
2023-05-09	2023-05-08	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		23.1400	-8,027	-186		2,439,074
2023-05-09	2023-05-05	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		23.2700	-70,250	-1,635		2,447,101
2023-05-04	2023-02-28	4/A	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		35.6300	-288,000	-10,261		2,517,351
2023-05-02	2023-05-01	4	Mutch Marcy D	FIBK	Class A Common Stock	P - Purchase	D		25.5900	5,000	128		45,877
2023-05-01	2023-04-28	4	Jensen Kirk D	FIBK	Class A Common Stock	P - Purchase	D		25.5700	1,000	26		18,572
2023-03-17	2023-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			9,652			52,819
2023-03-17	2023-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-2,972	-93		43,167
2023-03-17	2023-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			6,553			46,139
2023-03-17	2023-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-2,890	-91		39,586
2023-03-17	2023-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-1,400	-44		42,476
2023-03-17	2023-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-354	-11		43,876
2023-03-17	2023-03-15	4	Asker Lorrie	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-218	-7		6,589
2023-03-17	2023-03-15	4	Asker Lorrie	FIBK	Class A Common Stock	A - Award	D			718			6,807
2023-03-17	2023-03-15	4	Asker Lorrie	FIBK	Class A Common Stock	A - Award	D			1,058			6,089
2023-03-17	2023-03-15	4	Asker Lorrie	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-130	-4		5,031
2023-03-17	2023-03-15	4	Asker Lorrie	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-97	-3		5,161
2023-03-17	2023-03-15	4	Robbins Kristina	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-273	-9		8,870
2023-03-17	2023-03-15	4	Robbins Kristina	FIBK	Class A Common Stock	A - Award	D			897			9,143
2023-03-17	2023-03-15	4	Robbins Kristina	FIBK	Class A Common Stock	A - Award	D			1,322			8,246
2023-03-17	2023-03-15	4	Robbins Kristina	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-156	-5		6,924
2023-03-17	2023-03-15	4	Robbins Kristina	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-100	-3		7,080
2023-03-17	2023-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-371	-12		17,572
2023-03-17	2023-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			1,220			17,943
2023-03-17	2023-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			1,798			16,723
2023-03-17	2023-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-238	-7		14,925
2023-03-17	2023-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-139	-4		15,163
2023-03-17	2023-03-15	4	KNIERIEM KARLYN M	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-210	-7		20,755
2023-03-17	2023-03-15	4	ERKONEN SCOTT EDWARD	FIBK	Class A Common Stock	F - Taxes	D		31.3900	-135	-4		10,715
2023-03-17	2023-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			3,766			40,877
2023-03-17	2023-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			2,556			37,111
2023-03-15	2023-03-13	4	Scott Jonathan R	FIBK	Class A Common Stock	G - Gift	I			44,667			1,007,170
2023-03-15	2023-03-13	4	SCOTT JULIE A	FIBK	Class A Common Stock	G - Gift	I			89,333			2,517,349
2023-03-15	2023-03-13	4	SCOTT JULIE A	FIBK	Class A Common Stock	G - Gift	I			-89,333			2,517,349
2023-03-01	2023-02-28	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		35.6300	-288,000	-10,261		2,517,351
2023-02-23	2023-02-22	4	Scott Jonathan R	FIBK	Class A Common Stock	G - Gift	I			-1,350			962,503
2023-02-16	2023-02-15	4	Robbins Kristina	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-210	-8		7,180
2023-02-16	2023-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-1,319	-49		44,230
2023-02-16	2023-02-15	4	Mutch Marcy D	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-597	-22		34,555
2023-02-16	2023-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-285	-11		15,302
2023-02-16	2023-02-15	4	ERKONEN SCOTT EDWARD	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-266	-10		10,850
2023-02-16	2023-02-15	4	Asker Lorrie	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-168	-6		5,258
2023-02-16	2023-02-15	4	KNIERIEM KARLYN M	FIBK	Class A Common Stock	F - Taxes	D		37.3100	-638	-24		20,965
2023-02-13	2023-02-10	4	Asker Lorrie	FIBK	Class A Common Stock	A - Award	D			2,743			5,426
2023-02-13		3	Asker Lorrie	FIBK	Class A Common Stock		D						2,683
2023-02-07	2023-02-07	4	BRANNEN JAMES	FIBK	Class A Common Stock	S - Sale	D		36.7100	-9,300	-341		8,385
2023-01-23	2022-08-12	4	SCOTT JAMES R	FIBK	Class A Common Stock	S - Sale	I		40.9500	-6,215	-255		4,390,120
2022-12-12	2022-12-08	4	RILEY KEVIN P As Custodian under UTMA - 6	FIBK	Class A Common Stock	G - Gift	I			250			250
2022-12-12	2022-12-08	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Class A Common Stock	G - Gift	I			250			250
2022-12-12	2022-12-08	4	RILEY KEVIN P As Custodian under UTMA - 5	FIBK	Class A Common Stock	G - Gift	I			250			500
2022-12-12	2022-12-08	4	RILEY KEVIN P As Custodian under UTMA - 4	FIBK	Class A Common Stock	G - Gift	I			250			760
2022-12-12	2022-12-08	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Class A Common Stock	G - Gift	I			250			1,040
2022-12-12	2022-12-08	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Class A Common Stock	G - Gift	I			250			1,040
2022-12-12	2022-12-08	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-3,000			45,549
2022-12-12	2022-12-07	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		41.4550	-2,500	-104		48,549
2022-12-07	2022-12-05	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			589			4,396,335
2022-12-07	2022-12-05	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			-589			4,395,746
2022-12-05	2022-11-28	4	SCOTT HOMER A JR	FIBK	Class A Common Stock	G - Gift	I			-9,529			1,962,463
2022-12-01	2022-11-29	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			589			4,396,335
2022-12-01	2022-11-29	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			-589			4,395,746
2022-11-29	2022-11-28	4	Hayslip Ashley	FIBK	Class A Common Stock	A - Award	D			4,487			4,487
2022-11-18	2022-11-17	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		43.0700	-10,000	-431		2,803,418
2022-11-18	2022-11-16	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		43.1500	-10,000	-432		2,813,418
2022-11-17	2022-11-11	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		44.1600	-10,000	-442		2,823,418
2022-11-17	2022-11-11	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		44.1600	-10,000	-442		2,823,418
2022-11-17	2022-11-11	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		44.1600	-10,000	-442		2,833,418
2022-11-14	2022-11-10	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			-18,000			4,396,335
2022-11-14	2022-11-11	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		44.1600	-10,000	-442		963,853
2022-11-14	2022-11-11	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		44.1600	-10,000	-442		963,853
2022-11-14	2022-11-11	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		44.1600	-10,000	-442		963,853
2022-11-14	2022-11-10	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		46.2600	-3,852	-178		81,454
2022-11-08	2022-11-07	4	Lee Russell A	FIBK	Class A Common Stock	S - Sale	D		45.3000	-2,500	-113		4,771
2022-10-31	2022-10-31	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		46.0000	-5,000	-230		85,306
2022-10-31	2022-10-28	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		45.0000	-10,130	-456		90,306
2022-08-26	2022-08-24	4	SCOTT HOMER A JR	FIBK	Class A Common Stock	G - Gift	I			-2,500			2,012,419
2022-08-16	2022-08-16	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		42.0300	-2,500	-105		100,436
2022-08-12	2022-08-11	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		41.0100	-2,500	-103		102,936
2022-08-12	2022-08-10	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			6,215			4,414,335
2022-08-12	2022-08-10	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			-6,215			4,408,120
2022-08-12	2022-08-10	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	I			-12,425			4,414,335
2022-08-08	2022-08-05	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		40.5400	-23,715	-961		993,853
2022-08-08	2022-08-05	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		40.5400	-23,715	-961		993,853
2022-08-08	2022-08-05	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		40.5400	-23,715	-961		993,853
2022-08-08	2022-08-05	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		40.6600	-5,000	-203		6,001
2022-08-03	2022-08-01	4	Lee Russell A	FIBK	Class A Common Stock	S - Sale	D		40.3600	-1,400	-57		7,271
2022-08-03	2022-03-15	4	Lee Russell A	FIBK	Class A Common Stock	A - Award	D			1,355			8,671
2022-08-03	2022-08-03	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	S - Sale	D		40.7100	-1,000	-41		21,130
2022-07-19	2022-07-18	4	Heyneman Susan Scott	FIBK	Class A Common Stock	G - Gift	I			-7,500			639,256
2022-06-15	2022-06-13	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		36.0300	-5,000	-180		11,001
2022-06-02	2022-06-01	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		12,651
2022-06-02	2022-06-01	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		16,001
2022-06-02	2022-06-01	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		22,130
2022-06-02	2022-06-01	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		38.0700	2,889	110		9,734
2022-06-02	2022-06-01	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-12,000			51,049
2022-06-02	2022-06-01	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		37.2000	740	28		92,555
2022-06-02	2022-06-01	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		37.2226	450	17		91,815
2022-06-02	2022-06-01	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		37.3384	14,447	539		91,365
2022-06-02	2022-06-01	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		37.4978	262	10		76,918
2022-06-02	2022-06-01	4	BRANNEN JAMES	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		17,685
2022-06-02	2022-06-01	4	Cho Alice S	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		4,184
2022-06-02	2022-06-01	4	RYKHUS DANIEL A	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		18,645
2022-06-02	2022-06-01	4	Phillips Joyce Ann	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		2,991
2022-06-02	2022-06-01	4	Lacy Stephen Mark	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		13,473
2022-06-02	2022-06-01	4	Bowman Biff	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		3,579
2022-06-02	2022-06-01	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		7,847
2022-06-02	2022-06-01	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		6,701
2022-06-02	2022-06-01	4	HENNING THOMAS EDWARD	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		20,651
2022-06-02	2022-06-01	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		38.0700	2,889	110		19,873
2022-06-02	2022-06-01	4	Grieb Frances Pallas	FIBK	Class A Common Stock	A - Award	D		38.0700	1,576	60		19,035
2022-06-01	2022-05-28	4	Robbins Kristina	FIBK	Class A Common Stock	A - Award	D			2,626			7,390
2022-06-01		3	Robbins Kristina	FIBK	Class A Common Stock		D						4,764
2022-05-18	2022-05-17	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		34.8900	-1,199	-42		1,687
2022-03-29	2022-03-25	4	HEYNEMAN JOHN M JR	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,400,617		0
2022-03-29	2022-03-25	4	HEYNEMAN JOHN M JR	FIBK	Class B Common Stock	C - Conversion	D	0.00		-15,000		0
2022-03-29	2022-03-25	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	C - Conversion	I			1,400,617			1,403,322
2022-03-29	2022-03-25	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	C - Conversion	D			15,000			20,554
2022-03-29	2022-03-25	4	SCOTT JAMES R	FIBK	Class B Common Stock	C - Conversion	I	0.00		-4,355,343		0
2022-03-29	2022-03-25	4	SCOTT JAMES R	FIBK	Class A Common Stock	C - Conversion	I			4,355,343			4,426,760
2022-03-29	2022-03-25	4	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-265		0
2022-03-29	2022-03-25	4	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	I	0.00		-767,559		0
2022-03-29	2022-03-25	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			265			14,425
2022-03-29	2022-03-25	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	I			767,559			1,064,998
2022-03-29	2022-03-25	4	SCOTT JULIE A	FIBK	Class B Common Stock	C - Conversion	I	0.00		-2,391,090		0
2022-03-29	2022-03-25	4	SCOTT JULIE A	FIBK	Class A Common Stock	C - Conversion	I			2,391,090			2,641,907
2022-03-29	2022-03-25	4	Scott Jeremy	FIBK	Class B Common Stock	C - Conversion	I	0.00		-3,485,050		0
2022-03-29	2022-03-25	4	Scott Jeremy	FIBK	Class A Common Stock	C - Conversion	I			3,485,050			3,485,050
2022-03-29	2022-03-25	4	Scott Risa Kae	FIBK	Class B Common Stock	C - Conversion	I	0.00		-486,507		0
2022-03-29	2022-03-25	4	Scott Risa Kae	FIBK	Class A Common Stock	C - Conversion	I			486,507			486,592
2022-03-29	2022-03-25	4	Heyneman Susan Scott	FIBK	Class B Common Stock	C - Conversion	I	0.00		-646,756		0
2022-03-29	2022-03-25	4	Heyneman Susan Scott	FIBK	Class A Common Stock	C - Conversion	I			646,756			646,756
2022-03-29	2022-03-25	4	Scott James R. Jr	FIBK	Class B Common Stock	C - Conversion	I	0.00		-149,137		0
2022-03-29	2022-03-25	4	Scott James R. Jr	FIBK	Class A Common Stock	C - Conversion	I			149,137			156,720
2022-03-29	2022-03-25	4	SCOTT HOMER A JR	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,961,232		0
2022-03-29	2022-03-25	4	SCOTT HOMER A JR	FIBK	Class A Common Stock	C - Conversion	I			1,961,232			2,000,685
2022-03-22		3/A	James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees	FIBK	Class A Common Stock		D						11,075
2022-03-22		3/A	James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees	FIBK	Class A Common Stock		I						71,417
2022-03-22	2022-02-18	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	G - Gift	I			1,260			2,705
2022-03-22	2022-02-18	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	G - Gift	D			-1,260			5,554
2022-03-22		3/A	Towanda Investments Limited Partnership	FIBK	Class A Common Stock		I						1,445
2022-03-17	2022-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		39.2400	-1,247	-49		63,049
2022-03-17	2022-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		39.2400	-1,886	-74		64,296
2022-03-17	2022-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			6,214			66,182
2022-03-17	2022-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			19,116			59,968
2022-03-17	2022-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	F - Taxes	D			-729			35,152
2022-03-17	2022-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	F - Taxes	D			-298			35,881
2022-03-17	2022-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			2,401			36,179
2022-03-17	2022-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			4,614			33,778
2022-03-17	2022-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D			-139			2,897
2022-03-17	2022-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D			-374			3,036
2022-03-17	2022-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			1,232			3,410
2022-03-16	2022-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D			-285			20,374
2022-03-16	2022-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D			-468			20,659
2022-03-16	2022-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			1,542			21,127
2022-03-16	2022-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			3,843			19,585
2022-03-16	2022-03-15	4	KNIERIEM KARLYN M	FIBK	Class A Common Stock	A - Award	D			2,074			21,788
2022-03-16	2022-03-15	4	ERKONEN SCOTT EDWARD	FIBK	Class A Common Stock	A - Award	D			1,663			11,116
2022-03-16	2022-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D			-139			15,587
2022-03-16	2022-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D			-374			15,726
2022-03-16	2022-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			1,230			16,100
2022-03-16	2022-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			2,349			14,870
2022-03-15	2022-03-11	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		39.2500	-5,000	-196		14,160
2022-03-15	2022-03-10	4/A	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		38.9000	-12,850	-500		297,439
2022-03-15	2022-03-02	4/A	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	I			25,700			310,289
2022-03-14	2022-03-10	4	SCOTT JULIE A	FIBK	Class A Common Stock	S - Sale	I		38.9000	-12,850	-500		276,517
2022-03-11	2022-03-10	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		38.6900	-317	-12		2,178
2022-03-11	2022-03-10	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		38.7000	-1,546	-60		2,495
2022-03-10	2022-03-10	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	I		38.9000	-12,850	-500		299,239
2022-03-10	2022-03-08	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		39.0000	-5,000	-195		19,160
2022-03-10	2022-03-02	4	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	I	0.00		-25,700		767,559
2022-03-10	2022-03-02	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	I			27,500			312,089
2022-03-10		3/A	Scott Jonathan R	FIBK	Class A Common Stock		I						284,589
2022-03-04	2022-03-02	4	SCOTT JULIE A	FIBK	Class B Common Stock	C - Conversion	I	0.00		-25,700		2,363,457
2022-03-04	2022-03-02	4	SCOTT JULIE A	FIBK	Class A Common Stock	C - Conversion	I			25,700			573,956
2022-03-04	2022-03-02	4	SCOTT JULIE A	FIBK	Class B Common Stock	C - Conversion	I	0.00		-25,700		2,363,457
2022-03-04	2022-03-02	4	SCOTT JULIE A	FIBK	Class A Common Stock	C - Conversion	I			25,700			573,956
2022-02-24	2022-02-23	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		38.9350	-1,921	-75		4,041
2022-02-17	2022-02-15	4	ERKONEN SCOTT EDWARD	FIBK	Class A Common Stock	A - Award	D			2,683			9,453
2022-02-17	2022-02-15	4	KNIERIEM KARLYN M	FIBK	Class A Common Stock	A - Award	D			5,366			19,714
2022-02-17	2022-02-15	4	Mutch Marcy D	FIBK	Class A Common Stock	F - Taxes	D		38.0900	-957	-36		29,164
2022-02-17	2022-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		38.0900	-446	-17		5,962
2022-02-17	2022-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		38.0900	-2,183	-83		40,852
2022-02-17	2022-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		38.0900	-479	-18		12,521
2022-02-17	2022-02-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D		38.0900	-814	-31		15,742
2022-02-11		3	Exempt Thomas W Scott Marital Trust 2	FIBK	Class A Common Stock		I						548,256
2022-02-11		3	Thomas W Scott Trust Dtd 8/22/95, Thomas W Scott Trustee	FIBK	Class A Common Stock		I						548,256
2022-02-11		3	James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees	FIBK	Class A Common Stock		I						82,492
2022-02-11		3	First Interstate Bank TTEE for James R Scott Jr. GST Exempt Trust No 1 Dtd 12/11/2020	FIBK	Class A Common Stock		D						7,583
2022-02-11		3	Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees	FIBK	Class A Common Stock		D						0
2022-02-11		3	Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04	FIBK	Class A Common Stock		D						4,160
2022-02-11		3	Towanda Investments Limited Partnership	FIBK	Class A Common Stock		D						6,814
2022-02-11		3	Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15	FIBK	Class A Common Stock		D						0
2022-02-11		3	Risa K. Scott & John Heyneman Jr., TTEEs FBO Risa K Scott Exemption Trust Under the Scott Family 1996 Trust	FIBK	Class A Common Stock		I						85
2022-02-03	2022-02-01	4	Grieb Frances Pallas	FIBK	Class A Common Stock	A - Award	D		38.4100	867	33		17,459
2022-02-03	2022-02-01	4	Grieb Frances Pallas Trust	FIBK	Class A Common Stock	A - Award	I			4,212			4,212
2022-02-03	2022-02-01	4	Grieb Frances Pallas	FIBK	Class A Common Stock	A - Award	D			16,592			16,592
2022-02-03	2022-02-01	4	ERKONEN SCOTT EDWARD	FIBK	Class A Common Stock	A - Award	D			6,770			6,770
2022-02-03	2022-02-01	4	RYKHUS DANIEL A	FIBK	Class A Common Stock	A - Award	D		38.4100	477	18		17,069
2022-02-03	2022-02-01	4	RYKHUS DANIEL A	FIBK	Class A Common Stock	A - Award	D			16,592			16,592
2022-02-03	2022-02-01	4	HENNING THOMAS EDWARD	FIBK	Class A Common Stock	A - Award	D		38.4100	477	18		19,075
2022-02-03	2022-02-01	4	HENNING THOMAS EDWARD	FIBK	Class A Common Stock	A - Award	D			18,598			18,598
2022-02-03	2022-02-01	4	Lacy Stephen Mark	FIBK	Class A Common Stock	A - Award	D		38.4100	477	18		11,897
2022-02-03	2022-02-01	4	Lacy Stephen Mark	FIBK	Class A Common Stock	A - Award	D			11,420			11,420
2022-02-03	2022-02-01	4	KNIERIEM KARLYN M	FIBK	Class A Common Stock	A - Award	D			14,348			14,348
2022-02-03	2022-02-01	4	BRANNEN JAMES	FIBK	Class A Common Stock	A - Award	D		38.4100	477	18		16,109
2022-02-03	2022-02-01	4	BRANNEN JAMES	FIBK	Class A Common Stock	A - Award	D			15,632			15,632
2022-02-02		3/A	BRANNEN JAMES	FIBK	Class A Common Stock		D						0
2022-02-02	2022-02-01	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-20,000		520,731
2022-02-02	2022-02-01	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			20,000			24,017
2022-02-02	2022-02-02	4	Leckie Ross E.	FIBK	Class A Common Stock	P - Purchase	D		36.8050	300	11		6,845
2022-02-02	2022-02-02	4	Leckie Ross E.	FIBK	Class A Common Stock	P - Purchase	D		36.7900	700	26		6,545
2022-02-02	2022-02-02	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-3,000			7,300
2022-02-02		3	HENNING THOMAS EDWARD	FIBK	Class A Common Stock		D						0
2022-02-02		3	BRANNEN JAMES	FIBK	Class A Common Stock		D						11,411
2022-02-02		3	RYKHUS DANIEL A	FIBK	Class A Common Stock		D						0
2022-02-02		3	Grieb Frances Pallas	FIBK	Class A Common Stock		D						0
2022-02-02		3	KNIERIEM KARLYN M	FIBK	Class A Common Stock		D						0
2022-02-02		3	ERKONEN SCOTT EDWARD	FIBK	Class A Common Stock		D						0
2022-02-02		3	Lacy Stephen Mark	FIBK	Class A Common Stock		D						0
2021-12-16	2021-12-14	4	HEYNEMAN JOHN M JR By Child 2	FIBK	Class A Common Stock	G - Gift	I			650			650
2021-12-16	2021-12-14	4	HEYNEMAN JOHN M JR By Child 1	FIBK	Class A Common Stock	G - Gift	I			650			650
2021-12-16	2021-12-14	4	HEYNEMAN JOHN M JR By Spouse	FIBK	Class A Common Stock	G - Gift	I			325			325
2021-12-16	2021-12-14	4	HEYNEMAN JOHN M JR By Child 1	FIBK	Class A Common Stock	S - Sale	I		40.9600	-180	-7		470
2021-12-14	2021-12-14	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-1,500			43,035
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Class A Common Stock	P - Purchase	I		39.2700	40	2		540
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Class A Common Stock	P - Purchase	I		39.2700	40	2		540
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Class A Common Stock	P - Purchase	I		39.3000	40	2		540
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA - 4	FIBK	Class A Common Stock	P - Purchase	I		39.2900	10	0		260
2021-12-14	2021-12-13	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		39.2800	1,700	67		76,656
2021-12-14	2021-12-13	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		39.5800	1,050	42		74,956
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA - 4	FIBK	Class A Common Stock	G - Gift	I			250			250
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA - 5	FIBK	Class A Common Stock	G - Gift	I			250			250
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Class A Common Stock	G - Gift	I			250			790
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Class A Common Stock	G - Gift	I			250			790
2021-12-14	2021-12-13	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Class A Common Stock	G - Gift	I			250			790
2021-12-14	2021-12-13	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-1,250			44,535
2021-12-13	2021-12-13	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	G - Gift	I			-666			0
2021-12-13	2021-12-13	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-12,334			35,723
2021-12-13	2021-12-10	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,334		1,972,462
2021-12-13	2021-12-10	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,334			48,057
2021-12-10	2021-12-10	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-700			10,300
2021-12-10	2021-12-09	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-666		1,984,796
2021-12-10	2021-12-09	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-666			35,723
2021-12-10	2021-12-09	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			666			36,389
2021-12-10	2021-12-08	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-666		43,866
2021-12-10	2021-12-08	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	C - Conversion	I			666			666
2021-11-29	2021-11-26	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-10,500			11,000
2021-11-29	2021-11-26	4	Leckie Ross E.	FIBK	Class A Common Stock	P - Purchase	D		40.5900	500	20		5,845
2021-11-29	2021-11-24	4	Leckie Ross E.	FIBK	Class A Common Stock	P - Purchase	D		43.2450	500	22		5,345
2021-11-18	2021-11-18	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		43.5100	-1,350	-59		6,408
2021-07-13	2021-05-24	4	Scott Risa Kae By Trust	FIBK	Class A Common Stock	G - Gift	I			-8,750			85
2021-06-02	2021-06-01	4	Phillips Joyce Ann	FIBK	Class A Common Stock	A - Award	D		47.0700	1,168	55		1,415
2021-06-02	2021-06-01	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		47.0700	1,168	55		6,814
2021-06-02	2021-06-01	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D		47.0700	2,124	100		7,583
2021-06-02	2021-06-01	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		47.0700	1,805	85		16,984
2021-06-02	2021-06-01	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		47.0700	1,168	55		5,125
2021-06-02	2021-06-01	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D		47.0700	1,168	55		6,271
2021-06-02	2021-06-01	4	Cho Alice S	FIBK	Class A Common Stock	A - Award	D		47.0700	1,168	55		2,608
2021-06-02	2021-06-01	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		47.0700	2,124	100		11,075
2021-06-02	2021-06-01	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		47.0700	1,168	55		9,712
2021-06-02	2021-06-01	4	Bowman Biff	FIBK	Class A Common Stock	A - Award	D		47.0700	1,646	77		2,003
2021-06-02	2021-06-01	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		47.0700	2,124	100		4,845
2021-06-02	2021-06-01	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D		47.0700	1,646	77		4,017
2021-06-01	2021-05-28	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-21,500		1,961,232
2021-06-01	2021-05-28	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			21,500			21,500
2021-05-24	2021-05-21	4	Peterson Kade G	FIBK	Class A Common Stock	F - Taxes	D			-116			4,922
2021-05-17	2021-05-14	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-21,250		1,985,462
2021-05-17	2021-05-14	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			21,250			35,723
2021-05-10	2021-05-07	4	Scott Risa Kae By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-8,000		264,308
2021-05-10	2021-05-07	4	Scott Risa Kae By Trust	FIBK	Class A Common Stock	C - Conversion	I			8,000			8,835
2021-03-16	2021-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D			-798			16,555
2021-03-16	2021-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			2,628			17,353
2021-03-16	2021-03-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			2,809			14,725
2021-03-16	2021-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	F - Taxes	D			-820			30,121
2021-03-16	2021-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			2,699			30,941
2021-03-16	2021-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			2,942			28,242
2021-03-16	2021-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D			-679			13,000
2021-03-16	2021-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			2,236			13,679
2021-03-16	2021-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			1,366			11,443
2021-03-16	2021-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D			-4,623			45,785
2021-03-16	2021-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			11,091			50,408
2021-03-16	2021-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			11,594			39,317
2021-03-16	2021-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D			-552			7,758
2021-03-16	2021-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			1,818			8,310
2021-03-16	2021-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			1,473			6,492
2021-03-16	2021-03-15	4	Lee Russell A	FIBK	Class A Common Stock	A - Award	D			1,734			7,316
2021-03-16	2021-03-15	4	Peterson Kade G	FIBK	Class A Common Stock	A - Award	D			1,292			5,038
2021-03-11	2021-03-11	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		49.5700	1,400	69		73,906
2021-03-08	2021-03-08	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		49.5300	-1,949	-97		5,459
2021-03-08	2021-03-05	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		47.8100	-12,081	-578		7,408
2021-03-08	2021-03-05	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	G - Gift	D			-1,625			5,646
2021-03-04	2021-03-03	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		47.9500	-14,029	-673		19,489
2021-03-04	2021-03-03	4	SCOTT JULIE A By Child Trust - 2	FIBK	Class B Common Stock	C - Conversion	I	0.00		-131,731		0
2021-03-04	2021-03-03	4	SCOTT JULIE A By Child Trust - 1	FIBK	Class B Common Stock	C - Conversion	I	0.00		-131,731		0
2021-03-04	2021-03-03	4	SCOTT JULIE A By Child Trust - 1	FIBK	Class A Common Stock	C - Conversion	I			131,731			131,731
2021-03-04	2021-03-03	4	SCOTT JULIE A By Child Trust - 2	FIBK	Class A Common Stock	C - Conversion	I			131,731			131,731
2021-03-04	2021-03-03	4	Scott Jonathan R By Child Trust 3	FIBK	Class B Common Stock	C - Conversion	I	0.00		-94,863		0
2021-03-04	2021-03-03	4	Scott Jonathan R By Child Trust 2	FIBK	Class B Common Stock	C - Conversion	I	0.00		-94,863		0
2021-03-04	2021-03-03	4	Scott Jonathan R By Child Trust 1	FIBK	Class B Common Stock	C - Conversion	I	0.00		-94,863		0
2021-03-04	2021-03-03	4	Scott Jonathan R By Child Trust 2	FIBK	Class A Common Stock	C - Conversion	I			94,863			94,863
2021-03-04	2021-03-03	4	Scott Jonathan R By Child Trust 1	FIBK	Class A Common Stock	C - Conversion	I			94,863			94,863
2021-03-04	2021-03-03	4	Scott Jonathan R By Child Trust 3	FIBK	Class A Common Stock	C - Conversion	I			94,863			94,863
2021-03-04	2021-03-02	4	Phillips Joyce Ann	FIBK	Class A Common Stock	A - Award	D		45.4200	247	11		247
2021-03-04	2021-03-02	4	Bowman Biff	FIBK	Class A Common Stock	A - Award	D		45.4200	357	16		357
2021-03-04	2021-03-03	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		47.9400	-1,000	-48		2,721
2021-03-03	2021-03-01	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		46.1300	-12,500	-577		143
2021-03-01	2021-03-01	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		47.0000	-14,029	-659		33,518
2021-02-24		3	Phillips Joyce Ann	FIBK	Class A Common Stock		D						0
2021-02-23	2021-02-22	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		44.9400	-500	-22		3,721
2021-02-19		3	Bowman Biff	FIBK	Class A Common Stock		D						0
2021-02-18	2021-02-18	4	SCOTT JULIE A Trust	FIBK	Class A Common Stock	S - Sale	I		43.8300	-628	-28		0
2021-02-18	2021-02-17	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		44.0500	-8,378	-369		0
2021-02-18	2021-02-17	4	SCOTT JULIE A Trust	FIBK	Class A Common Stock	S - Sale	I		43.9100	-2,500	-110		628
2021-02-17	2021-02-16	4	SCOTT JULIE A Trust	FIBK	Class A Common Stock	S - Sale	I		43.9200	-13,591	-597		3,128
2021-02-17	2021-02-16	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		44.2900	-14,923	-661		8,378
2021-02-16	2021-02-15	4	Peterson Kade G	FIBK	Class A Common Stock	F - Taxes	D			-403			3,746
2021-02-16	2021-02-15	4	Mutch Marcy D	FIBK	Class A Common Stock	F - Taxes	D			-1,168			25,300
2021-02-16	2021-02-15	4	Newman Renee	FIBK	Class A Common Stock	F - Taxes	D			-663			4,321
2021-02-16	2021-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D			-3,165			27,723
2021-02-16	2021-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D			-712			10,077
2021-02-16	2021-02-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D			-1,033			11,916
2021-02-16	2021-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D			-636			5,019
2021-02-16	2021-02-15	4	Lee Russell A	FIBK	Class A Common Stock	F - Taxes	D			-256			5,582
2021-02-16	2021-01-18	4/A	SCOTT JULIE A Trust	FIBK	Class A Common Stock	C - Conversion	I			30,000			30,000
2021-02-16	2021-02-12	4	SCOTT JULIE A Trust	FIBK	Class A Common Stock	S - Sale	I		43.5900	-13,281	-579		16,719
2021-02-12	2021-02-12	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		43.5000	-800	-35		23,301
2021-02-10	2021-02-10	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		43.5700	-200	-9		24,101
2021-02-09	2021-02-09	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		43.0100	-1,000	-43		24,301
2021-02-04	2021-02-04	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		41.0000	-12,500	-512		12,643
2021-02-04	2021-02-04	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		41.0000	-60,100	-2,464		25,301
2021-02-04	2021-02-04	4	Heyneman Susan Scott	FIBK	Class A Common Stock	S - Sale	D		40.5960	-40,724	-1,653		100,000
2021-02-03	2021-02-03	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		40.0100	-10,223	-409		85,401
2021-02-03	2021-02-03	4	Heyneman Susan Scott	FIBK	Class A Common Stock	S - Sale	D		39.9290	-15,000	-599		140,724
2021-02-03	2021-02-03	4	Heyneman Susan Scott	FIBK	Class A Common Stock	S - Sale	D		39.8600	-15,000	-598		155,724
2021-02-03	2021-02-02	4	Heyneman Susan Scott	FIBK	Class A Common Stock	S - Sale	D		40.3960	-7,200	-291		170,724
2021-02-03	2021-02-02	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	S - Sale	I		39.7800	-283,944	-11,295		95,624
2021-01-26	2021-01-25	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-77,924		546,756
2021-01-26	2021-01-25	4	Heyneman Susan Scott	FIBK	Class A Common Stock	C - Conversion	D			77,924			177,924
2021-01-22	2021-01-21	4	Scott Jeremy N Bar 5, limited partnership	FIBK	Class B Common Stock	C - Conversion	I	0.00		-379,568		3,416,108
2021-01-22	2021-01-21	4	Scott Jeremy N Bar 5 limited partnership	FIBK	Class A Common Stock	C - Conversion	I			379,568			379,568
2021-01-19	2021-01-18	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-25,000		540,731
2021-01-19	2021-01-18	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	C - Conversion	I			25,000			25,143
2021-01-19	2021-01-18	4	SCOTT JULIE A By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-30,000		397,210
2021-01-19	2021-01-18	4	SCOTT JULIE A	FIBK	Class A Common Stock	C - Conversion	D			30,000			30,000
2021-01-15	2021-01-14	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-100,000		624,680
2021-01-15	2021-01-14	4	Heyneman Susan Scott	FIBK	Class A Common Stock	C - Conversion	D			100,000			100,000
2020-12-17	2020-12-17	4	Scott Jonathan R By Child Trust 1	FIBK	Class B Common Stock	G - Gift	I	0.00		48,650		94,863
2020-12-17	2020-12-17	4	Scott Jonathan R By Child Trust 3	FIBK	Class B Common Stock	G - Gift	I	0.00		48,650		94,863
2020-12-17	2020-12-17	4	Scott Jonathan R By Child Trust 2	FIBK	Class B Common Stock	G - Gift	I	0.00		48,650		94,863
2020-12-17	2020-12-17	4	SCOTT JULIE A By Child Trust - 1	FIBK	Class B Common Stock	G - Gift	I	0.00		48,650		131,731
2020-12-17	2020-12-17	4	SCOTT JULIE A By Child Trust - 2	FIBK	Class B Common Stock	G - Gift	I	0.00		48,650		131,731
2020-12-16	2020-12-16	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-133,548		1,982,732
2020-12-15	2020-12-14	4	Scott James R. Jr Trust	FIBK	Class B Common Stock	G - Gift	I			25,642		25,642
2020-12-15	2020-12-14	4	Scott James R. Jr	FIBK	Class B Common Stock	G - Gift	D			51,283		97,853
2020-12-15	2020-12-14	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-230,775		44,532
2020-12-14	2020-12-14	4	Scott Jeremy	FIBK	Class B Common Stock	G - Gift	D	0.00		350		14,024
2020-12-11	2020-12-09	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-600			30,888
2020-12-07	2020-12-04	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	S - Sale	I		39.9987	-105,000	-4,200		0
2020-12-02	2020-12-01	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		230,775		275,307
2020-12-02	2020-12-01	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-230,775		2,006,712
2020-11-30	2020-11-27	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-105,000		724,680
2020-11-30	2020-11-27	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	C - Conversion	I			105,000			105,000
2020-11-27	2020-11-25	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-13,250			14,473
2020-11-23	2020-11-20	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-36,300			0
2020-11-17	2020-11-16	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		39.8900	-1,807	-72		4,221
2020-11-16	2020-11-13	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-8,646		2,116,280
2020-11-13	2020-11-13	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-27,500		2,124,926
2020-11-13	2020-11-13	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-5,300			36,300
2020-11-13	2020-11-13	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			27,500			41,600
2020-11-13	2020-11-13	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-13,250			27,723
2020-11-12	2020-11-10	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-26,500		2,237,487
2020-11-12	2020-11-10	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			26,500			40,973
2020-11-10	2020-11-09	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		38.5700	-2,000	-77		6,028
2020-10-19	2020-10-16	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D		35.6900	-528	-19		12,949
2020-10-09	2020-10-09	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,100		2,152,426
2020-10-09	2020-10-09	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,100			14,100
2020-09-18	2020-09-18	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	G - Gift	I			-16,175			0
2020-09-14	2020-09-14	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-9,189			0
2020-08-19	2020-08-18	4	Lee Russell A	FIBK	Class A Common Stock	F - Taxes	D			-269			5,838
2020-08-13	2020-08-11	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		33.1000	11,000	364		72,506
2020-08-11	2020-08-10	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		31.7500	11,000	349		61,506
2020-08-07	2020-03-16	4/A	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		26.1600	-489	-13		10,789
2020-08-07	2020-03-16	4/A	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			2,397			11,278
2020-08-07	2020-03-16	4/A	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			5,021			26,468
2020-08-07	2020-03-16	4/A	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		26.1600	-1,548	-40		34,988
2020-08-07	2020-03-16	4/A	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			12,869			36,536
2020-08-07	2020-03-16	4/A	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		26.1600	-400	-10		5,655
2020-08-07	2020-03-16	4/A	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			2,115			6,055
2020-06-16	2020-06-12	4	Scott Risa Kae By Trust	FIBK	Class A Common Stock	G - Gift	I			-13,250			835
2020-06-15	2020-06-12	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		-5,715		2,002,245
2020-06-15	2020-06-12	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		-5,715		2,263,987
2020-06-15	2020-06-12	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		-5,715		2,166,526
2020-06-15	2020-06-12	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	J - Other	I	0.00		-5,715		829,680
2020-06-15	2020-06-12	4	Scott Risa Kae By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		-1,143		272,308
2020-06-09	2020-06-09	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Class A Common Stock	G - Gift	I			250			250
2020-06-09	2020-06-09	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Class A Common Stock	G - Gift	I			250			250
2020-06-09	2020-06-09	4	RILEY KEVIN P As Custodian under UTMA - 4	FIBK	Class A Common Stock	G - Gift	I			250			250
2020-06-09	2020-06-09	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Class A Common Stock	G - Gift	I			250			250
2020-06-09	2020-06-09	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-1,000			25,791
2020-06-09	2020-06-09	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		34.1300	2,000	68		50,506
2020-06-09	2020-06-09	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		33.8900	-2,000	-68		26,791
2020-06-09	2020-06-08	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-500			28,791
2020-06-04	2020-06-03	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		32.4200	-1,440	-47		8,028
2020-06-03	2020-05-29	4	Scott Risa Kae By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,000		273,451
2020-06-03	2020-05-29	4	Scott Risa Kae By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,000			14,085
2020-06-02	2020-06-01	4	Cho Alice S	FIBK	Class A Common Stock	A - Award	D		31.2500	1,440	45		1,440
2020-06-02	2020-06-01	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D		31.2500	2,080	65		2,371
2020-06-02	2020-06-01	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D		31.2500	2,720	85		47,547
2020-06-02	2020-06-01	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		31.2500	2,720	85		8,951
2020-06-02	2020-06-01	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		31.2500	1,440	45		3,957
2020-06-02	2020-06-01	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		31.2500	1,440	45		9,468
2020-06-02	2020-06-01	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D		31.2500	1,440	45		5,103
2020-06-02	2020-06-01	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		31.2500	2,400	75		15,179
2020-06-02	2020-06-01	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		31.2500	1,440	45		7,271
2020-06-02	2020-06-01	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		31.2500	2,080	65		8,544
2020-06-01	2020-05-29	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-3,225			9,189
2020-05-22	2020-05-21	4	Peterson Kade G	FIBK	Class A Common Stock	F - Taxes	D			-116			4,149
2020-05-19		3	Cho Alice S	FIBK	Class A Common Stock		D						0
2020-05-07	2020-05-06	4	Hart Charles E	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-1,972		0
2020-05-07	2020-05-06	4	Hart Charles E	FIBK	Class A Common Stock	F - Taxes	D		31.4200	-999	-31		26,285
2020-05-07	2020-05-06	4	Hart Charles E	FIBK	Class A Common Stock	S - Sale	D		31.4900	-100	-3		27,284
2020-05-07	2020-05-06	4	Hart Charles E	FIBK	Class A Common Stock	S - Sale	D		31.4100	-873	-27		27,384
2020-05-07	2020-05-06	4	Hart Charles E	FIBK	Class A Common Stock	M - Exercise	D		15.9100	1,972	31		28,257
2020-05-06	2020-05-05	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-7,950		835,395
2020-05-06	2020-05-05	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	C - Conversion	I			7,950			16,175
2020-04-23	2020-04-22	4	Corning Steven J	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-1,972		0
2020-04-23	2020-04-22	4	Corning Steven J	FIBK	Class A Common Stock	M - Exercise	D		15.9100	1,972	31		27,181
2020-03-17	2020-03-13	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	P - Purchase	I	0.00	27.3600	1,000	27	565,731
2020-03-17	2020-03-16	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		26.1600	-400	-10		4,185
2020-03-17	2020-03-16	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			2,115			4,585
2020-03-17	2020-03-16	4	Peterson Kade G	FIBK	Class A Common Stock	A - Award	D			2,205			4,265
2020-03-17	2020-03-16	4	Lee Russell A	FIBK	Class A Common Stock	A - Award	D			2,031			6,107
2020-03-17	2020-03-16	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		26.1600	-489	-13		8,989
2020-03-17	2020-03-16	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			2,397			9,478
2020-03-17	2020-03-16	4	Newman Renee	FIBK	Class A Common Stock	A - Award	D			2,644			4,984
2020-03-17	2020-03-16	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			5,021			24,278
2020-03-17	2020-03-16	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			4,794			13,477
2020-03-17	2020-03-16	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		26.1600	-1,548	-40		29,291
2020-03-17	2020-03-16	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			12,869			30,839
2020-03-17	2020-03-13	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	P - Purchase	I	0.00	27.3600	3,300	90	2,269,702
2020-03-17	2020-03-13	4	Scott Risa Kae By Trust	FIBK	Class B Common Stock	P - Purchase	I	0.00	27.3600	1,850	51	287,451
2020-03-17	2020-03-13	4	Scott Jeremy	FIBK	Class B Common Stock	S - Sale	D	0.00	27.3600	-8,000	-219	13,674
2020-03-17	2020-03-13	4	Scott Jeremy	FIBK	Class A Common Stock	S - Sale	D		26.9400	-400	-11		0
2020-03-16	2020-03-12	4	Lee Russell A	FIBK	Class A Common Stock	P - Purchase	D		25.7500	1,000	26		4,076
2020-03-06	2020-03-05	4	Gaglia Philip G	FIBK	Class A Common Stock	D - Sale to Issuer	D			-155			2,470
2020-03-06	2020-03-05	4	RILEY KEVIN P	FIBK	Class A Common Stock	D - Sale to Issuer	D			-599			17,970
2020-03-06	2020-03-05	4	Jensen Kirk D	FIBK	Class A Common Stock	D - Sale to Issuer	D			-189			7,081
2020-03-06	2020-03-05	4	Mutch Marcy D	FIBK	Class A Common Stock	D - Sale to Issuer	D			-230			19,257
2020-03-04		3	SUZOR SANDRA A SCOTT	FIBK	Class A Common Stock		D						65,670
2020-03-04		3	SUZOR SANDRA A SCOTT Trust	FIBK	Class A Common Stock		I						103,011
2020-03-04		3	SUZOR SANDRA A SCOTT	FIBK	Class A Common Stock		D						65,670
2020-03-04		3	SUZOR SANDRA A SCOTT Trust	FIBK	Class A Common Stock		I						103,011
2020-03-04		3	SUZOR SANDRA A SCOTT Trust	FIBK	Class A Common Stock		I						103,011
2020-03-04		3	SUZOR SANDRA A SCOTT	FIBK	Class A Common Stock		D						65,670
2020-02-27		3	Scott Jeremy	FIBK	Class A Common Stock		D						800
2020-02-27		3	Scott Jeremy	FIBK	Class A Common Stock		D						800
2020-02-27		3	Scott Jeremy	FIBK	Class A Common Stock		D						800
2020-02-26	2020-02-25	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D		38.6100	291	11		10,291
2020-02-24	2020-02-18	4	Lee Russell A	FIBK	Class A Common Stock	F - Taxes	D		39.1500	-330	-13		3,076
2020-02-24		3	Lee Russell A	FIBK	Class A Common Stock		D						10,812
2020-02-24		3	Lee Russell A IRA	FIBK	Class A Common Stock		I						11,406
2020-02-24		3	Lee Russell A	FIBK	Class A Common Stock		D						10,812
2020-02-24		3	Lee Russell A IRA	FIBK	Class A Common Stock		I						11,406
2020-02-24		3	Lee Russell A IRA	FIBK	Class A Common Stock		I						11,406
2020-02-24		3	Lee Russell A	FIBK	Class A Common Stock		D						10,812
2020-02-20		3	Scott Jonathan R By Trust	FIBK	Class A Common Stock		I						286
2020-02-20		3	Scott Jonathan R By Trust	FIBK	Class A Common Stock		I						286
2020-02-20		3	Scott Jonathan R By Trust	FIBK	Class A Common Stock		I						286
2020-02-19	2020-02-18	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		39.1500	-642	-25		7,270
2020-02-19	2020-02-18	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		39.1500	-2,438	-95		18,569
2020-02-19	2020-02-18	4	Newman Renee	FIBK	Class A Common Stock	F - Taxes	D		39.1500	-347	-14		2,340
2020-02-19	2020-02-18	4	Peterson Kade G	FIBK	Class A Common Stock	F - Taxes	D		39.1500	-140	-5		2,060
2020-02-19	2020-02-18	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		39.1500	-559	-22		2,625
2020-01-31	2020-01-31	5	Scott Risa Kae By Trust	FIBK	Class A Common Stock	G - Gift	I			-2,165			85
2020-01-31		3	Scott Risa Kae By Trust	FIBK	Class A Common Stock		I						4,500
2020-01-31		3	Scott Risa Kae By Trust	FIBK	Class A Common Stock		I						4,500
2020-01-31	2020-01-30	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-6,460		843,345
2020-01-31	2020-01-30	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	C - Conversion	I			6,460			8,225
2020-01-22	2019-11-27	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		42.4000	-11,782	-500		12,414
2019-12-13	2019-12-12	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	G - Gift	I			-670			1,765
2019-12-13	2019-12-11	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		42.0000	-4,902	-206		8,028
2019-12-12	2019-12-10	4/A	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		42.0000	-98	-4		12,930
2019-12-10	2019-12-10	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		42.0000	-98	-4		12,929
2019-12-04	2019-12-04	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-655		44,532
2019-12-04	2019-12-04	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	G - Gift	I			-655			0
2019-12-04	2019-12-04	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	C - Conversion	I			655			655
2019-12-04	2019-12-04	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-655		2,266,402
2019-12-04	2019-12-04	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-655			14,473
2019-12-04	2019-12-04	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			655			15,128
2019-11-27	2019-11-20	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		42.0900	475	20		12,779
2019-11-27	2019-11-25	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		42.0700	-923	-39		21,007
2019-11-27	2019-11-25	4	RILEY KEVIN P	FIBK	Class A Common Stock	P - Purchase	D		42.0900	1,300	55		21,930
2019-11-26	2019-11-25	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-11,950			14,473
2019-11-21	2019-11-15	4/A	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-7,744		2,172,241
2019-11-21	2019-11-15	4/A	SCOTT HOMER A JR By Spouse	FIBK	Class A Common Stock	G - Gift	I			234			13,487
2019-11-21	2019-11-15	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-234			24,914
2019-11-21	2019-11-19	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		42.4000	-90	-4		16,452
2019-11-19	2019-11-11	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-15,500		2,013,910
2019-11-19	2019-11-11	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	C - Conversion	I			15,500			16,600
2019-11-19	2019-11-19	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-5,950		2,007,960
2019-11-19	2019-11-19	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-16,395			205
2019-11-19	2019-11-19	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-5,000		2,267,057
2019-11-19	2019-11-19	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			5,000			26,423
2019-11-18	2019-11-15	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		42.4000	-628	-27		16,542
2019-11-18	2019-11-15	4	SCOTT HOMER A JR By Spouse	FIBK	Class A Common Stock	G - Gift	I			234			13,487
2019-11-18	2019-11-15	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-7,978			17,170
2019-11-07	2019-11-05	4/A	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		43.6300	-3,778	-165		45,127
2019-11-07	2019-11-07	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		43.4500	-300	-13		44,827
2019-11-06	2019-11-05	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		43.6300	-3,778	-165		44,543
2019-11-04	2019-11-01	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		42.9500	-900	-39		13,027
2019-11-04	2019-11-01	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		42.9400	-100	-4		13,927
2019-11-01	2019-11-01	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	G - Gift	I			-1,700			2,435
2019-11-01	2019-11-01	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-4,930			21,423
2019-10-31	2019-10-30	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,000		2,272,057
2019-10-31	2019-10-30	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,000			26,353
2019-10-18	2019-10-18	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		566,906
2019-10-18	2019-10-18	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			10,000			10,000
2019-10-15	2019-08-23	4/A	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		0		2,194,795
2019-10-15	2019-08-23	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			0			25,901
2019-10-10	2019-09-05	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			0			14,353
2019-09-16	2019-09-12	4	SCOTT RANDALL I Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-2,250		71,895
2019-09-16	2019-09-12	4	SCOTT RANDALL I Spouse	FIBK	Class A Common Stock	G - Gift	I			-630			1,620
2019-09-16	2019-09-12	4	SCOTT RANDALL I Spouse	FIBK	Class A Common Stock	C - Conversion	I			2,250			2,250
2019-09-13	2019-09-13	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,810		2,173,657
2019-09-13	2019-09-13	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,810			31,476
2019-09-13	2019-09-12	4	Leckie Ross E.	FIBK	Class A Commnon Stock	S - Sale	D		40.6000	-3,000	-122		14,027
2019-09-12	2019-09-09	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-15,563			16,666
2019-09-09	2019-09-09	4/A	Scott James R. Jr	FIBK	Class B Common Stock	C - Conversion	D			-28,575		46,570
2019-09-09	2019-09-09	4/A	Scott James R. Jr	FIBK	Class A Common Stock	C - Conversion	D			28,575			48,321
2019-09-09	2019-09-09	4	Scott James R. Jr	FIBK	Class B Common Stock	C - Conversion	D			-28,575		46,570
2019-09-09	2019-09-09	4	Scott James R. Jr	FIBK	Class A Common Stock	C - Conversion	D			28,575			48,231
2019-09-05	2019-09-05	4/A	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		39.8050	-1,219	-49		17,027
2019-09-05	2019-09-05	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		39.2700	-1,219	-48		17,027
2019-09-05	2019-09-05	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-7,430			6,923
2019-08-23	2019-08-23	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-6,328		2,188,467
2019-08-23	2019-08-23	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			6,328			32,229
2019-08-23	2019-08-23	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-6,500			14,353
2019-08-23	2019-08-19	4	MOSS PATRICIA L	FIBK	Class A Common Stock	J - Other	D		39.3000	10	0		2,517
2019-08-23	2019-08-21	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	G - Gift	I			-7,950			4,135
2019-08-06	2019-08-05	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	J - Other	D	0.00		-565		1,901,036
2019-08-06	2019-08-05	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-75,145		1,901,601
2019-08-06	2019-08-05	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-75,145		1,901,601
2019-08-06	2019-08-05	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-75,145		1,976,746
2019-08-06	2019-08-05	4	Scott James R. Jr	FIBK	Class B Common Stock	G - Gift	D			75,145		75,145
2019-08-06	2019-08-05	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		565		2,284,057
2019-06-17	2019-06-06	4/A	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,200		2,283,492
2019-06-17	2019-06-06	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-7,430			20,853
2019-06-17	2019-06-06	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,200			28,283
2019-06-12	2019-06-11	4	Wold Peter I	FIBK	Class A Common Stock	P - Purchase	D		37.8050	1,000	38		3,707
2019-06-11	2019-06-10	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-500			20,630
2019-06-07	2019-06-06	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,200		2,283,492
2019-06-07	2019-06-06	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-14,200			14,083
2019-06-07	2019-06-06	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,200			28,283
2019-06-07	2019-06-06	4	RILEY KEVIN P As Custodian under UTMA -2	FIBK	Class A Commnon Stock	G - Gift	I			250			250
2019-06-07	2019-06-06	4	RILEY KEVIN P As Custodian under UTMA -1	FIBK	Class A Commnon Stock	G - Gift	I			250			250
2019-06-07	2019-06-06	4	RILEY KEVIN P As Custodian under UTMA -3	FIBK	Class A Commnon Stock	G - Gift	I			250			250
2019-06-07	2019-06-06	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-750			21,130
2019-06-06	2019-06-04	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-13,490		2,194,795
2019-06-06	2019-06-04	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			13,490			25,901
2019-06-05	2019-06-03	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		26,285
2019-06-05	2019-06-03	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		3,663
2019-06-05	2019-06-03	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		25,209
2019-06-05	2019-06-03	4	Scott James R. Jr	FIBK	Class A Common Stock	F - Taxes	D		37.0600	-835	-31		19,495
2019-06-05	2019-06-03	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D		37.0600	2,302	85		20,330
2019-06-05	2019-06-03	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		7,846
2019-06-05	2019-06-03	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		12,304
2019-06-05	2019-06-03	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		18,246
2019-06-05	2019-06-03	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		2,507
2019-06-05	2019-06-03	4	SCOTT JAMES R	FIBK	Class A Commnon Stock	A - Award	D		37.0600	6,231	231		6,231
2019-06-05	2019-06-03	4	Wold Peter I	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		2,707
2019-06-05	2019-06-03	4	SCOTT RANDALL I	FIBK	Class A Commnon Stock	A - Award	D		37.0600	1,219	45		1,219
2019-06-05	2019-06-03	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		5,831
2019-06-05	2019-06-03	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		37.0600	1,219	45		6,464
2019-05-23	2019-05-20	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		39.3600	-5,000	-197		21,880
2019-05-23	2019-05-21	4	Peterson Kade G	FIBK	Class A Common Stock	F - Taxes	D			-116			2,200
2019-05-10	2019-05-09	4	Corning Steven J	FIBK	Class B Common Stock	C - Conversion	D	0.00		-15,208		0
2019-05-10	2019-05-09	4	Corning Steven J	FIBK	Class A Common Stock	C - Conversion	D			15,208			23,990
2019-05-01	2019-04-30	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		42.2000	-2,112	-89		3,184
2019-05-01	2019-04-29	4	Corning Steven J	FIBK	Class B Common Stock	M - Exercise	D	0.00		1,960		15,208
2019-05-01	2019-04-29	4	Corning Steven J	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.25		-1,960		0
2019-04-29	2019-04-26	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-2,366			12,411
2019-03-19	2019-03-15	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D			251			18,554
2019-03-19	2019-03-15	4	Scott James R. Jr	FIBK	Class A Common Stock	F - Taxes	D		41.9700	-98	-4		18,303
2019-03-19	2019-03-15	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D			238			18,401
2019-03-19	2019-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		41.9700	-2,627	-110		26,880
2019-03-19	2019-03-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			6,611			29,507
2019-03-19	2019-03-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			2,643			19,487
2019-03-19	2019-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		41.9700	-502	-21		5,296
2019-03-19	2019-03-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			1,652			5,798
2019-03-19	2019-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		41.9700	-669	-28		7,912
2019-03-19	2019-03-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			2,203			8,581
2019-03-14	2019-03-13	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		42.1300	-2,204	-93		17,027
2019-03-12	2019-03-08	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		41.1400	-15,670	-645		143
2019-03-08	2019-03-07	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,000		2,208,285
2019-03-08	2019-03-07	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,000			14,777
2019-03-04	2019-02-28	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-2,450		576,906
2019-03-04	2019-02-28	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			2,450			5,000
2019-02-25	2019-02-21	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			8,235			22,896
2019-02-21	2019-02-20	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			3,182			16,844
2019-02-20	2019-02-15	4	Peterson Kade G	FIBK	Class A Common Stock	A - Award	D			1,175			2,316
2019-02-20	2019-02-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			2,044			8,683
2019-02-20	2019-02-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	F - Taxes	D		41.1000	-298	-12		6,639
2019-02-20	2019-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D			-2,186			14,661
2019-02-20	2019-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			1,632			4,146
2019-02-20	2019-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		41.1000	-536	-22		2,514
2019-02-20	2019-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			1,630			6,378
2019-02-20	2019-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		41.1000	-675	-28		4,748
2019-02-20	2019-02-15	4	Newman Renee	FIBK	Class A Common Stock	A - Award	D			992			2,687
2019-02-20	2019-02-15	4	Newman Renee	FIBK	Class A Common Stock	F - Taxes	D		41.4000	-229	-9		1,695
2019-02-20	2019-02-15	4	Scott James R. Jr	FIBK	Class A Common Stock	F - Taxes	D			-99			18,163
2019-02-15	2019-02-13	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	G - Gift	I			1,000			31,000
2019-02-15	2019-02-13	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,000			104,896
2019-02-15	2019-02-12	4	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			400			1,440
2019-02-15	2019-02-12	4	EBZERY WILLIAM B As Custodian under UGMA -1	FIBK	Class A Common Stock	G - Gift	I			400			1,440
2019-02-15	2019-02-12	4	EBZERY WILLIAM B As Custodian under UGMA -2	FIBK	Class A Common Stock	G - Gift	I			400			1,440
2019-02-15	2019-02-12	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-25,200			105,896
2019-02-13	2019-02-12	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-6,300		849,805
2019-02-13	2019-02-12	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	C - Conversion	I			6,300			12,085
2019-02-07	2019-02-06	4	EBZERY WILLIAM B	FIBK	Stock Options (Right to Buy)	M - Exercise	D	13.60		-5,801		0
2019-02-07	2019-02-06	4	EBZERY WILLIAM B	FIBK	Stock Options (Right to Buy)	M - Exercise	D	13.25		-3,094		0
2019-02-07	2019-02-06	4	EBZERY WILLIAM B	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-1,972		0
2019-02-07	2019-02-06	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	M - Exercise	D		13.3000	5,801	77		10,867
2019-02-07	2019-02-06	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	M - Exercise	D		13.2500	3,094	41		5,066
2019-02-07	2019-02-06	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	M - Exercise	D		15.9100	1,972	31		1,972
2019-02-06	2019-02-04	4	Leckie Ross E.	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-1,632		0
2019-02-06	2019-02-04	4	Leckie Ross E.	FIBK	Class A Common Stock	M - Exercise	D		15.9100	1,632	26		19,231
2019-02-05	2017-05-03	5	Scott Jonathan R By Spouse	FIBK	Class A Common Stock	S - Sale	I		38.6900	-1,576	-61		0
2019-02-05	2017-05-01	5	Scott Jonathan R By Spouse	FIBK	Class A Common Stock	S - Sale	I		38.3000	-2,000	-77		1,576
2019-02-05	2017-03-01	5	Scott Jonathan R By Spouse	FIBK	Class A Common Stock	S - Sale	I		44.8400	-1,000	-45		3,576
2018-12-17	2018-12-17	4/A	SCOTT HOMER A JR By Spouse	FIBK	Class A Common Stock	G - Gift	I			134			13,253
2018-12-17	2018-12-17	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-134			2,777
2018-12-17	2018-12-17	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-134			2,777
2018-12-13	2018-12-13	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-637			14,083
2018-12-13	2018-12-11	4	RILEY KEVIN P	FIBK	Class A Common Stock	G - Gift	D			-100			16,847
2018-12-06	2018-12-03	4/A	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,150		2,297,692
2018-12-06	2018-12-03	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-6,160			14,720
2018-12-06	2018-12-03	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			1,150			20,880
2018-12-06	2018-12-04	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-637		45,187
2018-12-06	2018-12-04	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	G - Gift	I			-637			0
2018-12-06	2018-12-04	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	C - Conversion	I			637			637
2018-12-04	2018-12-03	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,150		2,297,692
2018-12-04	2018-12-03	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-5,960			14,920
2018-12-04	2018-12-03	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			1,150			20,880
2018-12-04	2018-12-03	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	G - Gift	I			-5,500			5,785
2018-12-04	2018-12-03	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-4,152			2,911
2018-11-30	2018-11-23	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-8,298			12,102
2018-11-30	2018-11-19	4/A	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-24,693		2,225,785
2018-11-30	2018-11-28	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-5,500		2,220,285
2018-11-30	2018-11-28	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			5,500			7,063
2018-11-28	2018-11-27	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-10,539			1,553
2018-11-27	2018-11-26	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-2,115		579,356
2018-11-26	2018-11-21	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-5,950		2,029,410
2018-11-26	2018-11-21	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-9,600			1,100
2018-11-26	2018-11-23	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-8,308			12,092
2018-11-26	2018-11-19	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-24,693		2,225,785
2018-11-23	2018-11-21	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		42.7000	-3,000	-128		10,813
2018-11-16	2018-11-15	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		42.8400	-11,700	-501		20,400
2018-11-15	2018-11-12	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-6,100			19,730
2018-11-02	2018-10-31	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		41.7800	975	41		48,506
2018-11-02	2018-10-31	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		41.6500	-7,000	-292		16,947
2018-11-01	2018-10-30	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		2,035,360
2018-11-01	2018-10-30	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	A - Award	I			10,000			10,700
2018-11-01	2018-10-30	4	Heyneman Susan Scott by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-5,500		856,105
2018-11-01	2018-10-30	4	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock	C - Conversion	I			5,500			11,285
2018-11-01	2018-10-31	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-15,000		2,250,478
2018-11-01	2018-10-31	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			15,000			32,100
2018-10-18	2018-10-16	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	D - Sale to Issuer	D			-581			6,937
2018-09-26	2018-09-24	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		45.7000	-1,094	-50		45,086
2018-08-24	2018-08-23	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-5,450			700
2018-08-21	2018-08-21	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		45.9100	-4,000	-184		17,599
2018-08-17	2018-08-17	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-5,650		2,045,360
2018-08-17	2018-08-17	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	C - Conversion	I			5,650			6,150
2018-08-15	2018-08-14	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-4,600		2,265,478
2018-08-15	2018-08-14	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			4,600			17,100
2018-08-01	2018-08-01	4	Peterson Kade G	FIBK	Class A Common Stock	A - Award	D			1,141			1,141
2018-07-09		3	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock		I						11,570
2018-07-09		3	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock		I						11,570
2018-07-09		3	Heyneman Susan Scott by Trust	FIBK	Class A Common Stock		I						11,570
2018-06-22	2017-12-04	4/A	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		2,280,078
2018-06-22	2017-12-04	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			10,000			10,000
2018-06-22	2018-05-07	4/A	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		2,270,078
2018-06-22	2018-05-07	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			10,000			15,000
2018-06-22	2018-03-12	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,200			5,000
2018-06-22	2018-02-02	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	G - Gift	I			-3,800			6,200
2018-06-22	2018-06-14	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	G - Gift	I			-234			12,954
2018-06-22	2018-05-09	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		42.0000	-2,500	-105		12,500
2018-06-08	2018-06-07	4	Hart Charles E	FIBK	Class B Common Stock	C - Conversion	D	0.00		-4,464		0
2018-06-08	2018-06-07	4	Hart Charles E	FIBK	Class A Common Stock	C - Conversion	D			4,464			25,066
2018-06-06	2018-05-07	4/A	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,500		2,310,592
2018-06-06	2018-05-07	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-12,500			11,560
2018-06-06	2018-05-07	4/A	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,500			24,060
2018-06-06	2018-06-04	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	S - Sale	I		43.8800	-6,000	-263		7,216
2018-06-06	2018-06-05	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-11,750		2,298,842
2018-06-06	2018-06-05	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			11,750			23,310
2018-06-04	2018-06-01	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		6,627
2018-06-04	2018-06-01	4	Wold Peter I	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		1,488
2018-06-04	2018-06-01	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		21,599
2018-06-04	2018-06-01	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		43.6500	2,520	110		2,520
2018-06-04	2018-06-01	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D		43.6500	1,145	50		18,457
2018-06-04	2018-06-01	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D		43.6500	859	37		5,151
2018-06-04	2018-06-01	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		1,288
2018-06-04	2018-06-01	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		11,085
2018-06-04	2018-06-01	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		2,444
2018-06-04	2018-06-01	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		572
2018-06-04	2018-06-01	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		20,602
2018-06-04	2018-06-01	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		4,612
2018-06-04	2018-06-01	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		43.6500	572	25		8,782
2018-06-04	2018-06-01	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		43.6500	1,145	50		5,245
2018-06-01	2018-05-30	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	S - Sale	D		43.9800	-2,000	-88		4,040
2018-06-01	2018-05-30	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	G - Gift	I			1,000			30,000
2018-06-01	2018-05-30	4	EBZERY WILLIAM B As Custodian under UGMA -1	FIBK	Class A Commnon Stock	G - Gift	I			320			1,040
2018-06-01	2018-05-30	4	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			320			1,040
2018-06-01	2018-05-30	4	EBZERY WILLIAM B As Custodian under UGMA -2	FIBK	Class A Commnon Stock	G - Gift	I			320			2,200
2018-06-01	2018-05-30	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,960			119,657
2018-05-29	2018-05-25	4	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	G - Gift	I			-1,190			0
2018-05-25	2018-05-24	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		43.8500	-19,623	-860		4,292
2018-05-25	2018-05-23	4	SCOTT RANDALL I Spouse	FIBK	Class B Common Stock	M - Exercise	I	0.00		-1,190		74,145
2018-05-25	2018-05-23	4	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	M - Exercise	I			1,190			1,190
2018-05-24	2016-12-15	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		16,737		139,921
2018-05-24	2016-12-12	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	S - Sale	D		41.8700	-1,000	-42		6,040
2018-05-24	2016-11-25	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	S - Sale	D		37.3500	-2,000	-75		7,040
2018-05-24	2016-11-03	4	HEYNEMAN JOHN M JR	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.82		-4,428		0
2018-05-24	2016-11-03	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	F - Taxes	D		31.1500	-2,959	-92		9,040
2018-05-24	2016-11-03	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	M - Exercise	D		20.8200	4,428	92		11,999
2018-05-24	2016-09-08	4	HEYNEMAN JOHN M JR	FIBK	Stock Options (Right to Buy)	M - Exercise	D	13.60		-5,801		0
2018-05-24	2016-09-08	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	F - Taxes	D		31.0500	-2,540	-79		7,571
2018-05-24	2016-09-08	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	M - Exercise	D		13.6000	5,801	79		10,111
2018-05-24	2016-08-24	4	HEYNEMAN JOHN M JR	FIBK	Stock Options (Right to Buy)	M - Exercise	D	13.25		-3,094		0
2018-05-24	2016-08-24	4	HEYNEMAN JOHN M JR	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-1,972		0
2018-05-24	2016-08-24	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	F - Taxes	D		30.0900	-2,405	-72		4,310
2018-05-24	2016-08-24	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	M - Exercise	D		13.2500	3,094	41		6,715
2018-05-24	2016-08-24	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	M - Exercise	D		15.9100	1,972	31		3,621
2018-05-18	2018-05-16	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	M - Exercise	I	0.00		-18,851		581,471
2018-05-18	2018-05-16	4	Scott Jonathan R	FIBK	Class A Common Stock	M - Exercise	D			18,851			23,915
2018-05-15	2018-02-23	4/A	Scott Jonathan R	FIBK	Class A Commnon Stock	A - Award	D			306			5,397
2018-05-15	2018-02-15	4/A	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,000		0
2018-05-15	2018-02-15	4/A	Scott Jonathan R	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.8700	2,000	42	2,000
2018-05-15	2018-02-15	4/A	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.87		-2,000		0
2018-05-15	2018-02-15	4/A	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D			-150			5,091
2018-05-15	2018-02-15	4/A	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D			-2,000			5,241
2018-05-15	2018-02-15	4/A	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			2,000			7,241
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	17.22		-4,306		0
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	14.37		-3,386		0
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	14.20		-2,303		0
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-916		265
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.0000	916	14	1,181
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.00		-916		0
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-4,000		265
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class B Common Stock	M - Exercise	D	0.00	19.9300	4,000	80	4,265
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	19.93		-4,000		0
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		41.1200	-15,244	-627		5,054
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class A Common Stock	M - Exercise	D		17.2200	4,306	74		20,298
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class A Common Stock	M - Exercise	D		14.3700	3,386	49		15,992
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class A Common Stock	M - Exercise	D		14.2000	2,303	33		12,606
2018-05-09	2018-05-07	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			4,916			10,303
2018-05-09	2018-05-09	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		41.8000	-1,000	-42		21,027
2018-05-09	2018-05-07	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		2,272,125
2018-05-09	2018-05-07	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			10,000			15,000
2018-05-09	2018-05-07	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,500		2,317,328
2018-05-09	2018-05-07	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-12,500			11,560
2018-05-09	2018-05-07	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,500			24,060
2018-05-03	2018-05-01	4	Corning Steven J	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.8700	2,504	52	13,248
2018-05-03	2018-05-01	4	Corning Steven J	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.87		-2,504		0
2018-04-19		3/A	MOSS PATRICIA L by Trust	FIBK	Class A Common Stock		I						7,202
2018-04-19		3/A	MOSS PATRICIA L by 401(k)	FIBK	Class A Common Stock		I						380
2018-04-19	2017-06-02	4/A	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		716
2018-04-19	2017-08-17	4/A	MOSS PATRICIA L by Trust	FIBK	Class A Common Stock	S - Sale	I		35.6600	-465	-17		6,737
2018-04-04	2017-11-09	4/A	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		246		2,329,828
2018-04-04	2017-11-09	4/A	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		246		46,360
2018-04-04	2017-11-09	4/A	SCOTT JAMES R By CRUT	FIBK	Class B Common Stock	G - Gift	I	0.00		-492		3,068
2018-04-04	2017-09-14	4/A	Scott James R. Jr	FIBK	Class B Common Stock	C - Conversion	D	0.00		-27,930		0
2018-04-04	2017-09-14	4/A	Scott James R. Jr	FIBK	Class A Common Stock	C - Conversion	D			27,930			29,263
2018-04-04	2017-08-15	4/A	Scott James R. Jr	FIBK	Class B Common Stock	G - Gift	D	0.00		27,930		27,930
2018-04-04	2017-08-15	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		210		2,329,582
2018-04-04	2017-08-15	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	J - Other	D	0.00		-210		2,127,036
2018-04-04	2017-08-15	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-9,450		2,127,246
2018-04-04	2017-08-15	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-18,480		2,136,696
2018-04-04	2017-08-15	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-9,264		2,155,176
2018-04-04	2017-08-15	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-18,666		2,164,440
2018-04-04	2017-08-15	4	J.S. Investments Limited Partnership	FIBK	Class B Common Stock	G - Gift	D	0.00		-27,930		2,183,106
2018-03-06	2018-02-14	4/A	GUENTHNER KEVIN	FIBK	Stock Options (Right to Buy)	M - Exercise	D	17.22		-5,878		0
2018-03-06	2018-02-14	4/A	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		40.3700	-5,878	-237		17,088
2018-03-06	2018-02-14	4/A	GUENTHNER KEVIN	FIBK	Class A Common Stock	M - Exercise	D		17.2200	5,878	101		22,966
2018-03-06	2018-03-05	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		40.5418	-6,100	-247		17,312
2018-03-06	2018-03-02	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		40.0690	-6,100	-244		23,412
2018-03-01	2018-02-16	4/A	Scott James R. Jr	FIBK	Class A Common Stock	F - Taxes	D			-32			29,206
2018-03-01	2018-02-28	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D			306			29,512
2018-03-01	2018-02-23	4	Scott Jonathan R	FIBK	Class A Commnon Stock	A - Award	D			306			5,387
2018-02-26	2018-02-22	4	SCOTT THOMAS W by Trust	FIBK	Class A Common Stock	S - Sale	I		39.5000	-250,000	-9,875		500
2018-02-22	2018-02-22	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		41.0258	-972	-40		7,544
2018-02-16	2017-12-01	4/A	Mutch Marcy D	FIBK	Class A Common Stock	D - Sale to Issuer	D			-145			15,776
2018-02-16	2017-12-01	4/A	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D			-96			5,241
2018-02-16	2017-12-01	4/A	Scott Jonathan R	FIBK	Class A Common Stock	D - Sale to Issuer	D			219			5,337
2018-02-16	2018-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,605			46,180
2018-02-16	2018-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			19,436			47,785
2018-02-16	2018-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	D - Sale to Issuer	D			-381			17,088
2018-02-16	2018-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			3,480			17,469
2018-02-16	2018-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	D - Sale to Issuer	D			-476			8,516
2018-02-16	2018-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			3,186			8,992
2018-02-16	2018-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			3,920			11,091
2018-02-16	2018-02-15	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			4,606			9,821
2018-02-16	2018-02-15	4	Newman Renee	FIBK	Class A Commnon Stock	A - Award	D			3,848			3,848
2018-02-16	2018-02-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			4,730			20,506
2018-02-16	2018-02-15	4	Scott Jonathan R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,000		0
2018-02-16	2018-02-15	4	Scott Jonathan R	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.8700	2,000	42	2,000
2018-02-16	2018-02-15	4	Scott Jonathan R	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.87		-2,000		0
2018-02-16	2018-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	D - Sale to Issuer	D			-160			5,081
2018-02-16	2018-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D			-2,000			5,241
2018-02-16	2018-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	C - Conversion	D			2,000			7,241
2018-02-16	2018-02-15	4	Scott James R. Jr	FIBK	Class A Common Stock	D - Sale to Issuer	D			-25			29,238
2018-02-15	2018-02-14	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-250,000		2,051,010
2018-02-15	2018-02-14	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	A - Award	I			250,000			250,500
2018-02-15	2018-02-14	4	GUENTHNER KEVIN	FIBK	Stock Options (Right to Buy)	M - Exercise	D	17.22		-5,878		5,878
2018-02-15	2018-02-14	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		40.3700	-5,878	-237		13,989
2018-02-15	2018-02-14	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	M - Exercise	D			5,878			19,867
2018-02-08	2018-02-07	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	C - Conversion	D	0.00		-1,960		0
2018-02-08	2018-02-07	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.2500	1,960	30	1,960
2018-02-08	2018-02-07	4	EBZERY WILLIAM B	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.25		-1,960		0
2018-02-08	2018-02-07	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,504		0
2018-02-08	2018-02-07	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.8700	2,504	52	2,504
2018-02-08	2018-02-07	4	EBZERY WILLIAM B	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.87		-2,504		0
2018-02-08	2018-02-07	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	C - Conversion	I			1,960			121,617
2018-02-08	2018-02-07	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	C - Conversion	I			2,504			119,657
2018-02-08	2018-02-06	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		169		2,323,092
2018-02-08	2018-02-06	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		169		2,323,092
2018-02-08	2018-02-06	4	SCOTT JAMES R By CRUT	FIBK	Class B Common Stock	G - Gift	I	0.00		-338		2,730
2018-02-07	2018-02-05	4	Hart Charles E	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.2500	1,960	30	4,464
2018-02-07	2018-02-05	4	Hart Charles E	FIBK	Options Exercise (Right to Buy)	M - Exercise	D	15.25		-1,960		0
2018-02-07	2018-02-05	4	Hart Charles E	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.8700	1,504	31	2,504
2018-02-07	2018-02-05	4	Hart Charles E	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.87		-1,504		0
2018-02-07	2018-02-05	4	Leckie Ross E.	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-340		1,632
2018-02-07	2018-02-05	4	Leckie Ross E.	FIBK	Class B Common Stock	C - Conversion	D	0.00		-660		0
2018-02-07	2018-02-05	4	Leckie Ross E.	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.2500	660	10	660
2018-02-07	2018-02-05	4	Leckie Ross E.	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.25		-660		0
2018-02-07	2018-02-05	4	Leckie Ross E.	FIBK	Class A Common Stock	M - Exercise	D			340			22,027
2018-02-07	2018-02-05	4	Leckie Ross E.	FIBK	Class A Common Stock	C - Conversion	D			660			21,687
2018-02-07	2018-02-05	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		41.3364	800	33		47,531
2018-02-07	2018-02-05	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		41.2621	-800	-33		28,349
2018-02-05	2017-12-04	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		40.0560	-1,000	-40		13,989
2018-02-05	2017-10-17	4	Hubbell Jodi Delahunt	FIBK	Class A Common Stock	A - Award	D			5,215			5,215
2017-12-12	2017-12-08	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-705		45,655
2017-12-12	2017-12-08	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-705		45,655
2017-12-12	2017-12-08	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-705			0
2017-12-12	2017-12-08	4	SCOTT JAMES R By Spouse	FIBK	Class A Common Stock	G - Gift	I			-705			0
2017-12-12	2017-12-08	4	SCOTT JAMES R By Spouse	FIBK	Class A Commnon Stock	C - Conversion	I			705			705
2017-12-12	2017-12-08	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			705			705
2017-12-12	2017-12-12	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		39.6095	-2,000	-79		21,028
2017-12-08	2017-12-01	4/A	Gaglia Philip G	FIBK	Class A Common Stock	D - Sale to Issuer	D		39.7000	-229	-9		6,156
2017-12-08	2017-12-01	4/A	Gaglia Philip G	FIBK	Class A Common Stock	D - Sale to Issuer	D			-425			6,385
2017-12-08	2017-12-01	4/A	Mutch Marcy D	FIBK	Class A Common Stock	D - Sale to Issuer	D			-145			16,013
2017-12-08	2017-12-07	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		39.1950	-350	-14		5,806
2017-12-06	2017-12-04	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		2,278,750
2017-12-06	2017-12-04	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			10,000			11,328
2017-12-06	2017-11-29	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-10,168		2,301,010
2017-12-06	2017-12-04	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-6,200		2,323,628
2017-12-06	2017-12-04	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-6,200			11,560
2017-12-06	2017-12-04	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	C - Conversion	I			6,200			17,760
2017-12-05	2017-12-01	4/A	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		39.7000	-609	-24		29,149
2017-12-05	2017-12-01	4/A	RILEY KEVIN P	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,128			29,758
2017-12-05	2017-05-26	4/A	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		36.0400	-800	-29		15,798
2017-12-05	2017-12-01	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		39.7000	-283	-11		14,989
2017-12-05	2017-12-01	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	D - Sale to Issuer	D			-526			15,272
2017-12-05	2017-12-01	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		39.7000	-229	-9		6,581
2017-12-05	2017-12-01	4	Gaglia Philip G	FIBK	Class A Common Stock	D - Sale to Issuer	D			-689			6,810
2017-12-05	2017-12-01	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		39.7000	-609	-24		31,405
2017-12-05	2017-12-01	4	RILEY KEVIN P	FIBK	Class Common Stock	D - Sale to Issuer	D			-1,128			32,014
2017-12-05	2017-12-01	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		39.7000	-96	-4		5,022
2017-12-05	2017-12-01	4	Scott Jonathan R	FIBK	Class A Common Stock	D - Sale to Issuer	D			-219			5,118
2017-12-05	2017-12-01	4	Mutch Marcy D	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,142			14,780
2017-12-01	2017-11-29	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-2,205		600,322
2017-11-30	2017-11-29	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	S - Sale	I		40.4573	-6,175	-250		13,216
2017-11-28	2017-11-22	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-8,206		2,290,078
2017-11-28	2017-11-28	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		39.4055	-10,000	-394		0
2017-11-27	2016-12-02	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		38.3800	-9,400	-361		10,000
2017-11-27	2016-11-07	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,000		2,298,284
2017-11-27	2016-11-07	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			10,000			19,400
2017-11-27	2016-05-26	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-4,000		2,308,284
2017-11-27	2016-02-06	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-9,400		2,312,284
2017-11-27	2016-02-06	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			9,400			9,400
2017-11-27	2015-12-19	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-17,842		2,321,684
2017-11-27	2015-11-04	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		28.4600	-10,100	-287		0
2017-11-20	2017-11-17	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		37.7609	-25,000	-944		13,188
2017-11-16	2017-11-16	4	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	G - Gift	I			-1,430			0
2017-11-15	2017-06-01	4/A	SCOTT RANDALL I	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		716
2017-11-15	2017-11-15	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		37.5640	-25,000	-939		38,188
2017-11-14	2017-11-10	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		36.8079	-25,000	-920		88,188
2017-11-14	2017-11-14	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		37.3279	-25,000	-933		63,188
2017-11-13	2017-11-10	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-5,400			500
2017-11-13	2017-11-09	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		246		2,329,582
2017-11-13	2017-11-09	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		246		2,329,582
2017-11-13	2017-11-09	4	SCOTT JAMES R By CRUT	FIBK	Class B Common Stock	G - Gift	I	0.00		-492		3,068
2017-11-02	2017-11-02	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		38.8500	-1,500	-58		23,028
2017-10-31	2017-10-27	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	M - Exercise	I	0.00		-100,000		602,527
2017-10-31	2017-10-27	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	M - Exercise	I			100,000			113,188
2017-10-06	2017-10-04	4	SCOTT RANDALL I By Spouse	FIBK	Class B Common Stock	M - Exercise	I	0.00		-1,430		75,335
2017-10-06	2017-10-04	4	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	M - Exercise	I			1,430			1,430
2017-10-06	2017-10-04	4	Scott James R. Jr	FIBK	Class B Common Stock	C - Conversion	D	0.00		-27,930		0
2017-10-06	2017-10-04	4	Scott James R. Jr	FIBK	Class A Common Stock	C - Conversion	D			27,930			29,263
2017-09-26	2017-09-14	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		35.5700	-500	-18		24,528
2017-09-26	2017-09-25	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		36.9000	-1,202	-44		30,886
2017-09-08	2017-09-06	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		33.8000	-357	-12		6,810
2017-09-01	2017-08-31	4/A	Mutch Marcy D By IRA	FIBK	Class A Common Stock	P - Purchase	I		35.3000	500	18		1,376
2017-08-31	2017-08-31	4	Mutch Marcy D	FIBK	Class A Common Stock	P - Purchase	D		35.3000	500	18		16,422
2017-08-17	2017-08-16	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,328		2,338,198
2017-08-17	2017-08-16	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			1,328			11,428
2017-08-17	2017-08-17	4	MOSS PATRICIA L	FIBK	Class A Common Stock	S - Sale	D		35.6600	-465	-17		7,717
2017-08-15	2017-08-15	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-12,700			5,900
2017-08-15	2017-08-13	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-18,600		2,311,178
2017-08-15	2017-08-13	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	C - Conversion	I			18,600			18,600
2017-08-15	2017-05-19	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-10,500			0
2017-08-15	2017-05-12	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-5,000		2,329,778
2017-08-15	2017-05-12	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	C - Conversion	I			5,000			10,500
2017-08-10	2017-08-10	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		259		2,329,372
2017-08-10	2017-08-10	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		259		2,329,372
2017-08-10	2017-08-10	4	SCOTT JAMES R By CRUT	FIBK	Class B Common Stock	G - Gift	I	0.00		-518		3,560
2017-07-24	2017-06-07	4/A	Leckie Ross E.	FIBK	Clas B Common Stock	C - Conversion	D	0.00		-1,300		0
2017-07-24	2017-06-07	4/A	Leckie Ross E.	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.2500	1,300	20	1,300
2017-07-24	2017-06-07	4/A	Leckie Ross E.	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.25		-1,300		660
2017-07-24	2017-06-07	4/A	Leckie Ross E.	FIBK	Class A Common Stock	C - Conversion	D			1,300			25,028
2017-07-05	2017-06-13	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	G - Gift	I			6,436			79,098
2017-07-05	2017-06-13	4	CRUM DAVID H	FIBK	Class A Common Stock	G - Gift	D			-6,436			0
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.91		-1,972		0
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Class B Common Stock	C - Conversion	D	0.00		-4,464		0
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.2500	1,960	30	4,464
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.25		-1,960		0
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.8700	2,504	52	2,504
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Stock Options (Right to Buy)	M - Exercise	D	20.87		-2,504		0
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Class A Common Stock	M - Exercise	D			1,972			6,436
2017-07-05	2017-06-07	4	CRUM DAVID H	FIBK	Class A Common Stock	C - Conversion	D			4,464			4,464
2017-06-14	2017-06-12	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	M - Exercise	I	0.00		-12,500		156,279
2017-06-14	2017-06-12	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	M - Exercise	I			12,500			18,675
2017-06-09	2017-06-07	4	Leckie Ross E.	FIBK	Class B Common Stock	C - Conversion	D	0.00		-1,300		660
2017-06-09	2017-06-07	4	Leckie Ross E.	FIBK	Class B Common Stock	M - Exercise	D	0.00	15.2500	1,300	20	1,300
2017-06-09	2017-06-07	4	Leckie Ross E.	FIBK	Stock Options (Right to Buy)	M - Exercise	D	15.25		-1,300		660
2017-06-09	2017-06-07	4	Leckie Ross E.	FIBK	Class A Common Stock	C - Conversion	D			1,300			25,028
2017-06-02		3	MOSS PATRICIA L	FIBK	Class A Common Stock		D						14,932
2017-06-02		3	MOSS PATRICIA L	FIBK	Class A Common Stock		D						14,932
2017-06-02		3	Johnson Dennis L	FIBK	Class A Common Stock		D						2,312
2017-06-02		3	Johnson Dennis L	FIBK	Class A Common Stock		D						2,312
2017-06-02	2017-06-02	4	MOSS PATRICIA L	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		8,182
2017-06-02	2017-06-02	4	Johnson Dennis L	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		1,872
2017-06-02	2017-06-01	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		34.9000	3,151	110		3,151
2017-06-02	2017-06-01	4	SCOTT RANDALL I	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		716
2017-06-02	2017-06-01	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	A - Award	I		34.9000	716	25		4,688
2017-06-02	2017-06-01	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		1,333
2017-06-02	2017-06-01	4	Wold Peter I	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		916
2017-06-02	2017-06-01	4	Williams Theodore H	FIBK	Class A Common Stock	A - Award	D		34.9000	1,432	50		11,152
2017-06-02	2017-06-01	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		6,055
2017-06-02	2017-06-01	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		23,728
2017-06-02	2017-06-01	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		10,513
2017-06-02	2017-06-01	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		20,030
2017-06-02	2017-06-01	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	A - Award	I		34.9000	716	25		117,153
2017-06-02	2017-06-01	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		34.9000	119	4		72,662
2017-06-02	2017-06-01	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		34.9000	1,432	50		4,100
2017-06-02	2017-06-01	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		34.9000	716	25		8,210
2017-06-01	2017-05-26	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		36.0400	-800	-29		3,226
2017-05-30	2017-05-26	4	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			380			87,720
2017-05-30	2017-05-26	4	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			380			87,720
2017-05-30	2017-05-26	4	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			380			720
2017-05-30	2017-05-26	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,140			116,437
2017-05-10	2017-05-08	4/A	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		249		2,329,113
2017-05-10	2017-05-08	4/A	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		249		45,855
2017-05-10	2017-05-08	4/A	SCOTT JAMES R By CRUT	FIBK	Class B Common Stock	G - Gift	I	0.00		-498		4,078
2017-05-10	2017-05-08	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		249		9,113
2017-05-10	2017-05-08	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		249		9,113
2017-05-10	2017-05-08	4	SCOTT JAMES R By CRUT	FIBK	Class B Common Stock	G - Gift	I	0.00		-498		4,078
2017-05-02	2017-04-28	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	C - Conversion	D	0.00		-5,916		0
2017-05-02	2017-04-28	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	M - Exercise	D	0.00	22.2500	5,916	132	5,916
2017-05-02	2017-04-28	4	EBZERY WILLIAM B	FIBK	Stock Options (Right to Buy)	M - Exercise	D	22.25		-5,916		0
2017-05-02	2017-04-28	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	C - Conversion	D			5,916			5,916
2017-04-17	2017-04-04	4/A	CRUM DAVID H By Trust	FIBK	Class A Common Stock	G - Gift	I			1,920			72,543
2017-04-17	2017-04-04	4/A	CRUM DAVID H	FIBK	Class A Common Stock	G - Gift	D			-1,920			0
2017-04-17	2017-03-23	4/A	CRUM DAVID H	FIBK	Class B Common Stock	C - Conversion	D	0.00		-1,920		0
2017-04-17	2017-03-23	4/A	CRUM DAVID H	FIBK	Class B Common Stock	M - Exercise	D	0.00	22.2500	1,920	43	1,920
2017-04-17	2017-03-23	4/A	CRUM DAVID H	FIBK	Stock Options (Right to Buy)	M - Exercise	D	22.25		-1,920		0
2017-04-17	2017-03-23	4/A	CRUM DAVID H	FIBK	Class A Common Stock	C - Conversion	D			1,920			1,920
2017-04-05	2017-04-04	4	Yose Stephen W.	FIBK	Class A Common Stock	D - Sale to Issuer	D		39.1500	-781	-31		10,259
2017-03-28	2017-02-28	4/A	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		43.1000	-100	-4		7,167
2017-03-28	2017-02-27	4/A	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		43.7500	-293	-13		7,267
2017-03-28	2017-02-15	4/A	Gottwals William D.	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-344	-14		8,362
2017-03-28	2017-03-25	4	CRUM DAVID H	FIBK	Class B Common Stock	C - Conversion	D	0.00		-1,920		0
2017-03-28	2017-03-25	4	CRUM DAVID H	FIBK	Class B Common Stock	M - Exercise	D	0.00		1,920		1,920
2017-03-28	2017-03-25	4	CRUM DAVID H	FIBK	Stock Options	M - Exercise	D	22.25	22.2500	-1,920	-43	0
2017-03-28	2017-03-25	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	G - Gift	I			1,920			72,543
2017-03-28	2017-03-25	4	CRUM DAVID H	FIBK	Class A Common Stock	G - Gift	D			-1,920			0
2017-03-28	2017-03-25	4	CRUM DAVID H	FIBK	Class A Common Stock	C - Conversion	D			1,920			1,920
2017-03-15	2017-03-13	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		42.7750	6,918	296		43,899
2017-03-15	2017-03-13	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		41.9900	-6,918	-290		34,920
2017-03-03	2017-02-28	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		43.1000	-100	-4		4,697
2017-02-28	2017-02-27	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		43.7500	-293	-13		4,797
2017-02-17	2017-02-15	4	Scott James R. Jr	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-25	-1		617
2017-02-17	2017-02-15	4	Scott James R. Jr	FIBK	Class A Common Stock	A - Award	D			252			642
2017-02-17	2017-02-15	4	Yose Stephen W.	FIBK	Class A Common Stock	A - Award	D			3,960			11,040
2017-02-17	2017-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-185	-8		5,556
2017-02-17	2017-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D			960			5,741
2017-02-17	2017-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-477	-20		16,589
2017-02-17	2017-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			3,120			17,066
2017-02-17	2017-02-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			4,380			15,922
2017-02-17	2017-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-245	-10		7,171
2017-02-17	2017-02-15	4	Jensen Kirk D	FIBK	Class A Common Stock	A - Award	D			3,600			7,416
2017-02-17	2017-02-15	4	Gottwals William D.	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-344	-14		7,815
2017-02-17	2017-02-15	4	Gottwals William D.	FIBK	Class A Common Stock	A - Award	D			3,360			8,706
2017-02-17	2015-08-25	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		26.1950	-850	-22		13,946
2017-02-17	2017-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-470	-20		7,560
2017-02-17	2017-02-15	4	Gaglia Philip G	FIBK	Class A Common Stock	A - Award	D			2,940			8,030
2017-02-17	2017-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		41.6500	-1,356	-56		41,838
2017-02-17	2017-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			11,394			43,194
2017-02-09	2017-02-09	4	SCOTT RANDALL I by trust	FIBK	Class A Common Stock	S - Sale	I		40.0710	-5,049	-202		6,175
2017-02-09	2017-02-07	4	Gaglia Philip G	FIBK	Class A Common Stock	S - Sale	D		39.5260	-752	-30		5,090
2017-02-08	2017-02-06	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-6,175		168,779
2017-02-08	2014-02-06	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	C - Conversion	I			6,175			11,224
2017-02-07		3	Jensen Kirk D	FIBK	Class A Common Stock		D						7,632
2017-02-07		3	Jensen Kirk D	FIBK	Class A Common Stock		D						7,632
2017-02-07		3	Gaglia Philip G By 401(k) Plan	FIBK	Class A Common Stock		I						8,000
2017-02-07		3	Gaglia Philip G By 401(k) Plan	FIBK	Class A Common Stock		I						8,000
2017-02-07		3	Gaglia Philip G	FIBK	Class A Common Stock		D						12,763
2017-02-07		3	Gaglia Philip G	FIBK	Class A Common Stock		D						12,763
2017-02-06	2017-02-06	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		233		2,328,864
2017-02-06	2017-02-06	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		233		2,328,864
2017-02-01	2017-01-31	4	Wold Peter I	FIBK	Class A Common Stock	J - Other	D		41.5500	200	8		200
2017-01-04	2016-12-31	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		42.5500	-466	-20		14,796
2017-01-04	2016-12-31	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			14			15,262
2017-01-04	2016-12-31	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		42.5500	-996	-42		31,800
2017-01-04	2016-12-31	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			30			32,796
2017-01-04	2016-12-31	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		42.5500	-184	-8		4,781
2017-01-04	2016-12-31	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D			7			4,965
2017-01-04	2016-12-31	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			2			11,542
2016-12-28	2016-12-28	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D			262			2,668
2016-12-15	2014-11-18	4/A	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			500			500
2016-12-15	2014-11-18	4/A	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			500			500
2016-12-15	2015-05-07	4/A	EBZERY WILLIAM B As custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			500			1,000
2016-12-15	2015-05-07	4/A	EBZERY WILLIAM B As custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			500			1,000
2016-12-15	2016-04-28	4/A	EBZERY WILLIAM B As custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			500			1,500
2016-12-15	2016-04-28	4/A	EBZERY WILLIAM B As custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			500			1,500
2016-12-15	2016-12-13	4	EBZERY WILLIAM B As Custodian under UGMA	FIBK	Class A Common Stock	G - Gift	I			340			340
2016-12-15	2016-12-13	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-340			111,661
2016-12-15	2016-12-13	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		16,737		152,969
2016-12-15	2016-12-15	4	Scott Jonathan R By Spouse	FIBK	Class A Common Stock	S - Sale	I		42.0151	-5,000	-210		4,576
2016-12-15	2016-11-22	4	Scott Jonathan R By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-9,576		50,000
2016-12-15	2016-11-22	4	Scott Jonathan R By Spouse	FIBK	Class A Common Stock	C - Conversion	I			9,576			9,576
2016-12-14	2016-12-12	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-786		45,373
2016-12-14	2016-12-12	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-20,021		2,328,631
2016-12-01	2016-11-29	4	Scott Jonathan R	FIBK	Stock Options	M - Exercise	D	20.62		-2,000		0
2016-12-01	2016-11-29	4	Scott Jonathan R	FIBK	Class A Common Stock	S - Sale	D		37.5000	-2,000	-75		4,958
2016-12-01	2016-11-29	4	Scott Jonathan R	FIBK	Class A Common Stock	M - Exercise	D		20.6200	2,000	41		6,958
2016-12-01	2016-11-29	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		37.6500	-949	-36		15,248
2016-11-23	2016-11-22	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	J - Other	I			757			5,049
2016-11-23	2016-11-22	4	SCOTT RANDALL I	FIBK	Class A Common Stock	J - Other	D			-757			0
2016-11-23	2016-11-22	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-2,334		710,590
2016-11-23	2016-11-22	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		252		2,348,652
2016-11-23	2016-11-22	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		252		2,348,652
2016-11-23	2016-11-22	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	J - Other	I			3,832			8,409
2016-11-23	2016-11-22	4	SCOTT JAMES R	FIBK	Class A Common Stock	J - Other	D			-3,832			0
2016-11-23	2016-11-22	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-20,325		2,334,778
2016-11-23	2016-11-22	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	G - Gift	I			-27,800			5,500
2016-11-08	2016-11-04	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-26,815		2,355,103
2016-11-08	2016-11-04	4	SCOTT THOMAS W By Trust	FIBK	Class A Common Stock	C - Conversion	I			26,815			26,815
2016-09-27	2016-09-26	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		31.9900	-1,202	-38		32,766
2016-08-25	2016-05-24	4/A	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.6000	-1,000	-29		10,175
2016-08-25	2016-05-23	4/A	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.4154	-1,300	-37		11,175
2016-08-25	2016-08-24	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		30.2021	-960	-29		3,972
2016-08-16	2016-08-12	4	Scott James R. Jr	FIBK	Class A Common Stock	S - Sale	D		29.3703	-6,707	-197		390
2016-08-10	2016-08-09	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		29.7132	2,676	80		36,981
2016-08-10	2016-08-09	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		29.6728	-2,676	-79		33,968
2016-08-05	2016-08-04	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		29.0700	-4,000	-116		5,232
2016-08-05	2016-08-04	4	Leckie Ross E.	FIBK	Class A Common Stock	S - Sale	D		29.1500	-1,545	-45		23,012
2016-08-05	2016-08-05	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		317		2,348,400
2016-08-05	2016-08-05	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		317		2,348,400
2016-08-02	2016-08-01	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		29.2000	-1,000	-29		9,232
2016-08-01	2016-07-28	4	Scott James R. Jr	FIBK	Class B Common Stock	C - Conversion	D	0.00		-5,950		0
2016-08-01	2016-07-28	4	Scott James R. Jr	FIBK	Class A Common Stock	C - Conversion	D			5,950			7,097
2016-07-19	2016-07-16	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		28.9300	-1,333	-39		36,644
2016-07-19	2016-07-18	4	SCOTT THOMAS W By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		2,381,918		2,381,918
2016-07-19	2016-07-18	4	SCOTT THOMAS W	FIBK	Class B Common Stock	J - Other	D	0.00		-2,381,918		0
2016-06-01		3	Scott James R. Jr	FIBK	Class A Common Stock		D						2,294
2016-06-01		3	Scott James R. Jr	FIBK	Class A Common Stock		D						2,294
2016-06-01	2016-05-27	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.9100	-1,000	-29		10,232
2016-06-01	2016-05-31	4	Hart Charles E	FIBK	Class B Common Stock	M - Exercise	D	20.87		1,000		1,000
2016-06-01	2016-05-31	4	Hart Charles E	FIBK	Stock Options	M - Exercise	D	20.87		-1,000		1,504
2016-05-31	2016-05-26	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	14.37		-2,977		0
2016-05-31	2016-05-26	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	14.20		-1,449		0
2016-05-31	2016-05-26	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		28.8500	-897	-26		16,197
2016-05-31	2016-05-26	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D			-2,916			17,094
2016-05-31	2016-05-26	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	M - Exercise	D		14.3700	2,977	43		20,010
2016-05-31	2016-05-26	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	M - Exercise	D		14.2000	1,449	21		17,033
2016-05-27	2016-05-25	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		28.7000	1,236	35		7,494
2016-05-27	2016-05-25	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		28.7000	757	22		2,406
2016-05-27	2016-05-25	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		28.7000	757	22		70,623
2016-05-27	2016-05-25	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		28.7000	1,236	35		19,314
2016-05-27	2016-05-25	4	Heyneman Charles M	FIBK	Class A Common Stock	A - Award	D		28.7000	757	22		5,706
2016-05-27	2016-05-25	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	A - Award	I		28.7000	757	22		112,001
2016-05-27	2016-05-25	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		28.7000	757	22		9,797
2016-05-27	2016-05-25	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		28.7000	757	22		24,557
2016-05-27	2016-05-25	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	A - Award	I		28.7000	757	22		11,232
2016-05-27	2016-05-25	4	SCOTT RANDALL I	FIBK	Class A Common Stock	A - Award	D		28.7000	757	22		757
2016-05-27	2016-05-25	4	SULLIVAN MICHAEL J/CO By Trust	FIBK	Class A Common Stock	A - Award	I		28.7000	757	22		4,374
2016-05-27	2016-05-25	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		28.7000	757	22		5,339
2016-05-27	2016-05-25	4	Williams Theodore H	FIBK	Class A Common Stock	A - Award	D		28.7000	1,454	42		9,720
2016-05-27	2016-05-25	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		28.7000	3,832	110		3,832
2016-05-25	2016-05-23	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		582		6,570
2016-05-25	2016-05-23	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		424		6,412
2016-05-25	2016-05-23	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-1,006		136,232
2016-05-25	2016-05-24	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.6000	-1,000	-29		10,475
2016-05-25	2016-05-23	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		27.9000	-1,000	-28		11,475
2016-05-16	2016-05-13	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		339		2,348,083
2016-05-16	2016-05-13	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		339		2,348,083
2016-05-13	2016-05-11	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	J - Other	I			1,649			4,292
2016-05-13	2016-05-11	4	SCOTT RANDALL I	FIBK	Class A Common Stock	J - Other	D			-1,649			0
2016-05-11	2016-05-09	4	SCOTT THOMAS W	FIBK	Class A Common Stock	G - Gift	D			-7,450			6,485
2016-05-09	2016-05-05	4	SULLIVAN MICHAEL J/CO	FIBK	Stock Options	M - Exercise	D	17.75		-2,152		0
2016-05-09	2016-05-05	4	SULLIVAN MICHAEL J/CO	FIBK	Class A Common Stock	F - Taxes	D			-1,425			3,127
2016-05-09	2016-05-05	4	SULLIVAN MICHAEL J/CO	FIBK	Class A Common Stock	M - Exercise	D		17.7500	2,152	38		4,552
2016-05-05	2016-05-03	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-9,260		712,924
2016-05-05	2016-05-03	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	C - Conversion	I			9,260			12,475
2016-05-03	2016-04-29	4	CRUM DAVID H	FIBK	Stock Options	M - Exercise	D	17.75		-2,152		0
2016-05-03	2016-04-29	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	M - Exercise	I		17.7500	2,152	38		69,866
2016-05-02	2016-04-28	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		27.4972	1,200	33		34,305
2016-05-02	2016-04-28	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		27.4876	-1,200	-33		37,977
2016-05-02	2016-04-28	4	EBZERY WILLIAM B	FIBK	Stock Options	M - Exercise	D	17.75		-6,484		0
2016-05-02	2016-04-28	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,000			111,244
2016-05-02	2016-04-28	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	M - Exercise	I		17.7500	6,484	115		112,244
2016-04-06	2016-04-04	4	Yose Stephen W.	FIBK	Class A Common Stock	A - Award	D			7,080			7,080
2016-02-26	2016-02-25	4	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	G - Gift	I			-250			0
2016-02-26	2016-02-24	4	Gottwals William D. By IRA	FIBK	Class A Common Stock	P - Purchase	I		25.6600	13,636	350		13,636
2016-02-24	2016-02-23	4	Mutch Marcy D	FIBK	Stock Options	M - Exercise	D	0.00	17.2200	-486	-8	0
2016-02-24	2016-02-23	4	Mutch Marcy D	FIBK	Stock Options	M - Exercise	D	0.00	14.3700	-398	-6	0
2016-02-24	2016-02-23	4	Mutch Marcy D	FIBK	Class A Common Stock	M - Exercise	D		17.2200	486	8		11,540
2016-02-24	2016-02-23	4	Mutch Marcy D	FIBK	Class A Common Stock	M - Exercise	D		14.3700	398	6		11,054
2016-02-17	2014-11-21	4/A	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.0540	-1,000	-28		13,242
2016-02-17	2015-11-05	4/A	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		29.0419	-4,484	-130		3,215
2016-02-17	2015-11-04	4/A	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.8400	-2,000	-58		7,699
2016-02-17	2016-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		26.2000	-228	-6		4,958
2016-02-17	2016-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D			954			5,186
2016-02-17	2016-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		26.2000	-761	-20		39,177
2016-02-17	2016-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			11,448			39,938
2016-02-17	2016-02-15	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			4,578			10,656
2016-02-17	2016-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		26.2000	-508	-13		15,584
2016-02-17	2016-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			1,908			16,092
2016-02-17	2015-02-15	4	Gottwals William D.	FIBK	Class A Common Stock	A - Award	D			5,346			5,346
2016-02-12	2015-11-25	5	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-910			3,448
2016-02-12	2016-02-10	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		341		2,347,744
2016-02-12	2016-02-10	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		341		2,347,744
2016-01-04	2015-12-31	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		29.6100	-187	-6		22,787
2016-01-04	2015-12-31	4	Cerkovnik Robert M	FIBK	Class A Common Stock	D - Sale to Issuer	D			-113			22,974
2016-01-04	2015-12-31	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		29.6100	-440	-13		14,184
2016-01-04	2015-12-31	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	D - Sale to Issuer	D			-264			14,624
2015-11-30	2015-11-19	4/A	SCOTT RANDALL I By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-3,600		76,765
2015-11-30	2015-11-19	4/A	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	G - Gift	I			-3,350			250
2015-11-30	2015-11-19	4/A	SCOTT RANDALL I By Spouse	FIBK	Class A Common Stock	C - Conversion	I			3,600			3,600
2015-11-30	2015-11-25	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-910		44,910
2015-11-30	2015-11-25	4	SCOTT JAMES R	FIBK	Class A Common Stock	G - Gift	D			-2,857			1,129
2015-11-30	2015-11-30	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	J - Other	I			2,250			29,000
2015-11-30	2015-11-30	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	J - Other	I			-2,250			105,760
2015-11-20	2015-11-18	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-2,898		722,184
2015-11-20	2015-11-18	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-8,550		2,381,918
2015-11-20	2015-11-18	4	SCOTT THOMAS W	FIBK	Class A Common Stock	G - Gift	D			-6,838			13,935
2015-11-20	2015-11-19	4	SCOTT RANDALL I By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-3,600		76,765
2015-11-17	2015-11-13	4	Williams Theodore H	FIBK	Class A Common Stock	P - Purchase	D		29.1199	28	1		8,266
2015-11-17	2015-11-16	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		341		45,820
2015-11-17	2015-11-16	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		341		45,820
2015-11-13	2015-11-11	4	Scott Jonathan R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-963		702
2015-11-13	2015-11-11	4	Scott Jonathan R	FIBK	Class B common Stock	M - Exercise	D	0.00		1,400		1,665
2015-11-13	2015-11-11	4	Scott Jonathan R	FIBK	Stock Options	M - Exercise	D	17.00		-1,400		0
2015-11-06	2015-11-05	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		29.0419	-4,300	-125		3,499
2015-11-06	2015-11-04	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.8400	-2,000	-58		7,799
2015-11-03	2015-11-03	4	Mutch Marcy D	FIBK	Stock Options	M - Exercise	D	0.00	17.2200	-972	-17	486
2015-11-03	2015-11-03	4	Mutch Marcy D	FIBK	Class A Common Stock	M - Exercise	D		17.2200	972	17		6,078
2015-11-03	2015-11-03	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.5591	-6,000	-171		9,799
2015-09-25		3	Mutch Marcy D By 401(k) Plan	FIBK	Class A Common Stock		I						4,517
2015-09-25		3	Mutch Marcy D By 401(k) Plan	FIBK	Class A Common Stock		I						4,517
2015-09-25		3	Mutch Marcy D By Spouse	FIBK	Class A Common Stock		I						4,363
2015-09-25		3	Mutch Marcy D By Spouse	FIBK	Class A Common Stock		I						4,363
2015-09-25		3	Mutch Marcy D By IRA	FIBK	Class A Common Stock		I						5,229
2015-09-25		3	Mutch Marcy D	FIBK	Class A Common Stock		D						7,656
2015-09-25		3	Mutch Marcy D By IRA	FIBK	Class A Common Stock		I						5,229
2015-09-25		3	Mutch Marcy D	FIBK	Class A Common Stock		D						7,656
2015-09-25	2015-09-25	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			10,818			28,490
2015-09-25	2015-09-25	4	Mutch Marcy D	FIBK	Class A Common Stock	A - Award	D			1,803			5,106
2015-09-01	2015-08-31	4	Huston Michael G.	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-800	-14	1,000
2015-09-01	2015-08-31	4	Huston Michael G. By IRA	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,776		0
2015-09-01	2015-08-31	4	Huston Michael G.	FIBK	Class A Common Stock	S - Sale	D		26.5125	-800	-21		8,636
2015-09-01	2015-08-31	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D		17.0000	800	14		9,436
2015-09-01	2015-08-31	4	Huston Michael G. By IRA	FIBK	Class A Common Stock	C - Conversion	I			1,776			1,776
2015-09-01	2015-08-28	4	Huston Michael G. By Trust	FIBK	Class A Common Stock	J - Other	I			804			16,996
2015-09-01	2015-08-28	4	Huston Michael G.	FIBK	Class A Common Stock	J - Other	D			-804			8,636
2015-08-26	2015-08-24	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		26.1800	-1,250	-33		14,888
2015-08-26	2015-08-24	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		358		45,479
2015-08-26	2015-08-24	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		358		45,479
2015-08-24	2015-08-24	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	P - Purchase	I		26.3200	1,521	40		108,010
2015-08-20	2015-08-18	4	Cerkovnik Robert M By IRA	FIBK	Class B Common Stock	C - Conversion	I	0.00		-1,492		0
2015-08-20	2015-08-18	4	Cerkovnik Robert M By IRA	FIBK	Class A Common Stock	C - Conversion	I			1,492			1,492
2015-08-18	2015-08-14	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		27.8100	29	1		446
2015-08-10	2015-08-07	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,000		725,082
2015-08-10	2015-08-07	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,000			15,799
2015-08-07	2015-08-05	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.2200	-3,000	-85		3,799
2015-07-20	2015-07-16	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		28.0900	-1,334	-37		17,672
2015-05-27	2015-05-22	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	15.25	15.2500	-6,052	-92	6,052
2015-05-27	2015-05-22	4	GARDING ED	FIBK	Class A Common Stock	S - Sale	D		27.2835	-6,052	-165		123,285
2015-05-27	2015-05-22	4	GARDING ED	FIBK	Class A Common Stock	M - Exercise	D		15.2500	6,052	92		129,337
2015-05-22	2015-05-20	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		27.5900	1,286	35		6,258
2015-05-22	2015-05-20	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		1,649
2015-05-22	2015-05-20	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		27.5900	1,513	42		67,714
2015-05-22	2015-05-20	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	A - Award	I		27.5900	788	22		106,489
2015-05-22	2015-05-20	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		27.5900	1,286	35		18,078
2015-05-22	2015-05-20	4	Heyneman Charles M	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		4,949
2015-05-22	2015-05-20	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		1,649
2015-05-22	2015-05-20	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		9,040
2015-05-22	2015-05-20	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		23,800
2015-05-22	2015-05-20	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		27.5900	3,986	110		3,986
2015-05-22	2015-05-20	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	A - Award	I		27.5900	933	26		6,799
2015-05-22	2015-05-20	4	SCOTT RANDALL I	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		1,649
2015-05-22	2015-05-20	4	SCOTT THOMAS W	FIBK	Class A Common Stock	A - Award	D		27.5900	3,805	105		20,773
2015-05-22	2015-05-20	4	SULLIVAN MICHAEL J/CO By Trust	FIBK	Class A Common Stock	A - Award	I		27.5900	788	22		3,617
2015-05-22	2015-05-20	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		27.5900	788	22		4,582
2015-05-22	2015-05-20	4	Williams Theodore H	FIBK	Class A Common Stock	A - Award	D		27.5900	1,513	42		8,210
2015-05-15	2015-05-15	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		370		45,121
2015-05-15	2015-05-15	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		370		45,121
2015-05-07	2015-05-07	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,000			105,701
2015-05-07	2015-05-07	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		27.0508	-1,500	-41		4,161
2015-05-06	2015-05-05	4	SULLIVAN MICHAEL J/CO	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,208		4,900
2015-05-06	2015-05-05	4	SULLIVAN MICHAEL J/CO	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-2,208	-35	0
2015-05-06	2015-05-06	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	M - Exercise	I	0.00		2,208		2,346,334
2015-05-06	2015-05-06	4	SCOTT JAMES R	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-2,208	-35	0
2015-05-06	2015-05-06	4	SCOTT THOMAS W	FIBK	Class A Common Stock	G - Gift	D			-7,407			16,968
2015-05-06	2015-05-05	4	SCOTT THOMAS W	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,208		2,390,468
2015-05-06	2015-05-05	4	SCOTT THOMAS W	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-2,208	-35	0
2015-05-04	2015-05-01	4	EBZERY WILLIAM B	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-2,208	-35	0
2015-05-04	2015-05-01	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	M - Exercise	I		15.7500	2,208	35		106,701
2015-05-01	2015-04-30	4	CRUM DAVID H	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-2,208	-35	0
2015-05-01	2015-04-30	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	M - Exercise	I		15.7500	2,208	35		66,201
2015-03-19	2014-11-18	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		28.6200	2	0		417
2015-03-19	2014-08-18	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		25.9800	3	0		415
2015-03-19	2014-05-20	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		25.0800	3	0		412
2015-03-19	2014-02-18	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		25.1700	3	0		410
2015-03-19	2013-11-18	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		25.9800	2	0		407
2015-03-19	2013-08-16	4	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock	P - Purchase	I		23.5100	2	0		405
2015-03-03	2015-02-27	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		26.3650	-1,000	-26		16,138
2015-03-02	2015-02-27	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		26.5204	605	16		33,105
2015-03-02	2015-02-27	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		26.5180	-605	-16		19,006
2015-02-19	2015-02-17	4	Huston Michael G.	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-155	-4		9,440
2015-02-19	2015-02-17	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-107	-3		4,232
2015-02-19	2015-02-17	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-166	-4		17,138
2015-02-19	2015-02-18	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		385		44,751
2015-02-19	2015-02-18	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		385		44,751
2015-02-19	2015-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	17.22	17.2200	-834	-14	835
2015-02-19	2015-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	14.37	14.3700	-1,070	-15	0
2015-02-19	2015-02-19	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D			-1,435			23,087
2015-02-19	2015-02-19	4	Cerkovnik Robert M	FIBK	Class A Common Stock	M - Exercise	D		17.2200	834	14		24,522
2015-02-19	2015-02-19	4	Cerkovnik Robert M	FIBK	Class A Common Stock	M - Exercise	D		14.3700	1,070	15		23,688
2015-02-19	2015-02-17	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-120	-3		22,618
2015-02-18	2015-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-331	-9		17,304
2015-02-18	2015-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			2,754			17,635
2015-02-18	2015-02-15	4	GARDING ED	FIBK	Class A Common Stock	A - Award	D			10,782			123,285
2015-02-18	2015-02-15	4	Huston Michael G.	FIBK	Class A Common A Stock	F - Taxes	D		26.1500	-390	-10		9,595
2015-02-18	2015-02-15	4	Huston Michael G.	FIBK	Class A Common A Stock	A - Award	D			3,246			9,985
2015-02-18	2015-02-15	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-221	-6		22,738
2015-02-18	2015-02-15	4	Cerkovnik Robert M	FIBK	Class A Common Stock	A - Award	D			2,556			22,959
2015-02-18	2015-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-381	-10		19,611
2015-02-18	2015-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			5,910			19,992
2015-02-18	2015-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		26.1500	-166	-4		4,339
2015-02-18	2015-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D			1,146			4,505
2015-02-04	2015-02-03	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-4,000		2,339,526
2015-02-03	2015-01-30	4	EBZERY WILLIAM B	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-4,440	-70	0
2015-02-03	2015-01-30	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	M - Exercise	I		15.7500	4,440	70		104,493
2015-01-05	2014-12-31	4	GARDING ED	FIBK	Class A Common Stock	D - Sale to Issuer	D			-3,592			112,503
2015-01-05	2014-12-31	4	Huston Michael G.	FIBK	Class A Common Stock	D - Sale to Issuer	D		27.8800	-134	-4		6,739
2015-01-05	2014-12-31	4	Huston Michael G.	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,209			6,873
2015-01-05	2014-12-31	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,296			14,881
2014-12-05	2014-12-04	4	Cerkovnik Robert M	FIBK	Class A Common Stock	G - Gift	D			-357			20,403
2014-12-01	2014-11-26	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.1668	-6,000	-169		5,866
2014-11-26	2014-11-25	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.2569	-1,476	-42		11,866
2014-11-26	2014-11-25	4	SCOTT JAMES R By Trust	FIBK	Classs B Common Stock	J - Other	I	0.00		365		44,366
2014-11-26	2014-11-25	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		365		44,366
2014-11-25	2014-11-25	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-967		44,001
2014-11-25	2014-11-25	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-10,499		2,340,976
2014-11-24	2014-11-21	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-484		2,387,776
2014-11-24	2014-11-21	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		28.0557	-900	-25		13,342
2014-11-18	2014-11-18	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-9,850		2,343,526
2014-11-18	2014-11-18	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,000			100,053
2014-11-18	2014-11-18	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	J - Other	I			-3,000			101,053
2014-11-18	2014-11-18	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	J - Other	I			3,000			26,750
2014-11-18	2014-11-14	4	GARDING ED	FIBK	Class B Common Stock	F - Taxes	D	0.00		-44,556		11,856
2014-11-18	2014-11-14	4	GARDING ED	FIBK	Class B Common Stock	M - Exercise	D	0.00	19.4967	54,000	1,053	56,412
2014-11-18	2014-11-14	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	20.87	20.8700	-18,000	-376	0
2014-11-18	2014-11-14	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	20.62	20.6200	-18,000	-371	0
2014-11-18	2014-11-14	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-18,000	-306	0
2014-11-18	2014-11-18	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-8,465		2,388,260
2014-11-18	2014-11-18	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-8,466		2,396,725
2014-11-18	2014-11-17	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-2,949		737,082
2014-11-17	2014-11-14	4	GARDING ED	FIBK	Class B Common Stock	F - Taxes	D	0.00		-43,004		13,408
2014-11-17	2014-11-14	4	GARDING ED	FIBK	Class B Common Stock	M - Exercise	D	0.00	19.4967	54,000	1,053	56,412
2014-11-17	2014-11-14	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	20.87	20.8700	-18,000	-376	0
2014-11-17	2014-11-14	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	20.62	20.6200	-18,000	-371	0
2014-11-17	2014-11-14	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-18,000	-306	0
2014-11-14	2014-11-06	4	SCOTT RANDALL I By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-1,739		80,365
2014-11-10	2014-05-19	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		25.3480	20	1		116,075
2014-11-10	2014-11-06	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	14.20	14.2000	-10,489	-149	0
2014-11-10	2014-11-06	4	GARDING ED	FIBK	Stock Options	M - Exercise	D	13.87	13.8700	-18,000	-250	18,000
2014-11-10	2014-11-06	4	GARDING ED	FIBK	Class A Common Stock	S - Sale	D		28.9058	-28,489	-823		116,095
2014-11-10	2014-11-06	4	GARDING ED	FIBK	Class A Common Stock	M - Exercise	D		14.2000	10,489	149		144,584
2014-11-10	2014-11-06	4	GARDING ED	FIBK	Class A Common Stock	M - Exercise	D		13.8700	18,000	250		134,095
2014-11-10	2014-11-07	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		29.2141	-6,000	-175		16,242
2014-11-10	2014-11-10	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		29.0943	-10,000	-291		10,100
2014-11-04	2014-10-31	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		29.2842	-1,500	-44		5,661
2014-10-02	2014-10-01	4	Williams Theodore H	FIBK	Class A Common Stock	P - Purchase	D		26.6500	1,000	27		6,697
2014-09-03	2014-09-03	4	Williams Theodore H	FIBK	Class A Common Stock	P - Purchase	D		27.1600	1,000	27		5,697
2014-09-02	2014-08-29	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		26.5000	-750	-20		16,177
2014-08-28	2014-08-26	4	SCOTT THOMAS W	FIBK	Class A Common Stock	G - Gift	D			-7,420			24,859
2014-08-21	2014-08-19	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		26.0700	2,500	65		32,500
2014-08-21	2014-08-19	4	RILEY KEVIN P	FIBK	Class A Common Stock	S - Sale	D		26.0400	-2,500	-65		14,082
2014-08-21	2014-08-20	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		406		44,968
2014-08-21	2014-08-20	4	SCOTT JAMES R By Trust	FIBK	Classs B Common Stock	J - Other	I	0.00		406		44,968
2014-08-21	2014-08-15	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		25.8797	20	1		116,074
2014-08-08	2014-08-06	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		25.5000	-9,615	-245		32,279
2014-08-06	2014-08-05	4	Williams Theodore H	FIBK	Class A Common Stock	P - Purchase	D		25.5000	1,000	26		4,697
2014-07-29	2014-07-29	4	SCOTT THOMAS W	FIBK	Class B Common Stock	C - Conversion	D	0.00		-9,615		2,405,191
2014-07-29	2014-07-29	4	SCOTT THOMAS W	FIBK	Class A Common Stock	C - Conversion	D			9,615			41,894
2014-07-17	2014-07-16	4	RILEY KEVIN P	FIBK	Class A Common Stock	F - Taxes	D		27.3500	-1,334	-36		16,582
2014-07-02	2014-07-02	4	Williams Theodore H	FIBK	Class A Common Stock	P - Purchase	D		27.7000	1,000	28		3,697
2014-06-02	2014-05-29	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		25.7453	-1,000	-26		16,927
2014-05-27	2014-05-23	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		25.7450	-700	-18		7,161
2014-05-23	2014-05-21	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		25.2400	1,405	35		4,972
2014-05-23	2014-05-21	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		25.2400	1,653	42		63,993
2014-05-23	2014-05-21	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	A - Award	I		25.2400	1,653	42		104,053
2014-05-23	2014-05-21	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		25.2400	1,950	49		16,792
2014-05-23	2014-05-21	4	Heyneman Charles M	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		7,861
2014-05-23	2014-05-21	4	HEYNEMAN JOHN M JR	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		861
2014-05-23	2014-05-21	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		8,252
2014-05-23	2014-05-21	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		23,012
2014-05-23	2014-05-21	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	A - Award	I		25.2400	861	22		22,242
2014-05-23	2014-05-21	4	SCOTT RANDALL I	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		861
2014-05-23	2014-05-22	4	SULLIVAN MICHAEL J/CO	FIBK	Stock Options	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2014-05-23	2014-05-22	4	SULLIVAN MICHAEL J/CO	FIBK	Class A Common Stock	M - Exercise	D		13.1200	2,400	31		2,400
2014-05-23	2014-05-21	4	SULLIVAN MICHAEL J/CO By Trust	FIBK	Class A Common Stock	A - Award	I		25.2400	861	22		2,829
2014-05-23	2014-05-21	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		3,794
2014-05-23	2014-05-21	4	Williams Theodore H	FIBK	Class A Common Stock	A - Award	D		25.2400	1,653	42		2,697
2014-05-23	2014-05-21	4	SCOTT THOMAS W	FIBK	Class A Common Stock	A - Award	D		25.2400	4,160	105		32,279
2014-05-23	2014-05-21	4	SCOTT JAMES R	FIBK	Class A Common Stock	A - Award	D		25.2400	4,358	110		4,358
2014-05-23	2014-05-21	4	Crandall Dana L	FIBK	Class A Common Stock	A - Award	D		25.2400	861	22		861
2014-05-15	2014-05-14	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		411		44,562
2014-05-15	2014-05-14	4	SCOTT JAMES R By Trust	FIBK	Classs B Common Stock	J - Other	I	0.00		411		44,562
2014-05-15	2014-05-15	4	SCOTT THOMAS W	FIBK	Class A Common Stock	J - Other	D			23,076			28,119
2014-05-15	2014-05-15	4	SCOTT THOMAS W By 401(k) Plan	FIBK	Class A Common Stock	J - Other	I			-23,076			0
2014-05-09	2014-05-07	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		24.7700	-20,000	-495		21,381
2014-05-09	2014-05-07	4	SCOTT RANDALL I	FIBK	Class B Common Stock	J - Other	D	0.00		-1,616		0
2014-05-09	2014-05-07	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	F - Taxes	I	0.00		-2,726		174,954
2014-05-09	2014-05-07	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	M - Exercise	I	0.00		6,224		177,680
2014-05-09	2014-05-07	4	SCOTT RANDALL I	FIBK	Stock Options	M - Exercise	D	15.75	15.7500	-2,208	-35	0
2014-05-09	2014-05-07	4	SCOTT RANDALL I	FIBK	Stock Options	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2014-05-08	2014-05-07	4	Huston Michael G. By Trust	FIBK	Class A Common Stock	J - Other	I			781			16,192
2014-05-08	2014-05-07	4	Huston Michael G.	FIBK	Class A Common Stock	J - Other	D			-781			8,082
2014-05-06	2014-05-02	4	SCOTT JAMES R	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,400		2,400
2014-05-06	2014-05-02	4	SCOTT JAMES R	FIBK	Stock Options	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2014-05-06	2014-05-02	4	SCOTT THOMAS W	FIBK	Class B Common Stock	F - Taxes	D	0.00		-1,282		2,414,806
2014-05-06	2014-05-02	4	SCOTT THOMAS W	FIBK	Class B Common Stock	M - Exercise	D	0.00	13.1200	2,400	31	2,416,088
2014-05-06	2014-05-02	4	SCOTT THOMAS W	FIBK	Stock Options	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2014-05-05	2014-05-01	4	EBZERY WILLIAM B	FIBK	Stock Options	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2014-05-05	2014-05-01	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	M - Exercise	I		13.1200	2,400	31		102,400
2014-05-02	2014-02-17	4/A	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-100	-3		19,139
2014-05-02	2014-02-15	4/A	Cerkovnik Robert M	FIBK	Class A Common Stock	A - Award	D			2,430			19,239
2014-05-02	2014-02-15	4/A	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-54	-1		16,809
2014-05-02	2014-02-14	4/A	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		25.2600	-123	-3		16,863
2014-05-02	2014-02-17	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-107	-3		3,359
2014-05-02	2014-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	A - Award	D			1,338			3,466
2014-05-02	2014-02-15	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-94	-2		2,128
2014-05-02	2014-02-14	4	Scott Jonathan R	FIBK	Class A Common Stock	F - Taxes	D		25.2600	-75	-2		2,222
2014-05-02	2014-04-30	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-20,000		740,031
2014-05-02	2014-04-30	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	C - Conversion	I			20,000			41,381
2014-04-30	2014-04-28	4	CRUM DAVID H	FIBK	Stock Option	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2014-04-30	2014-04-28	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	M - Exercise	I		13.1200	2,400	31		62,340
2014-02-28	2014-02-28	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		25.7605	-3,935	-101		20,100
2014-02-28	2014-02-27	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		25.7500	-2,310	-59		24,035
2014-02-28	2014-02-26	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		25.7683	-1,199	-31		26,345
2014-02-28	2014-02-28	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		25.9300	-4,700	-122		21,381
2014-02-28	2014-02-27	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		25.6500	-1,000	-26		26,081
2014-02-26	2014-02-24	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	S - Sale	I		25.4550	-2,000	-51		27,081
2014-02-26	2014-02-25	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	S - Sale	I		25.3025	-111,430	-2,819		0
2014-02-24	2014-02-20	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-20,100		2,353,376
2014-02-24	2014-02-20	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			20,100			27,544
2014-02-24	2014-02-21	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-19,960		760,031
2014-02-24	2014-02-21	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	C - Conversion	I			19,960			29,081
2014-02-20	2014-02-18	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		25.1900	-1,884	-47		17,927
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Class B Common Stock	F - Taxes	D	0.00		-6,045		1,051
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.7400	6,800	141	7,096
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	17.22	17.2200	-834	-14	1,669
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	14.37	14.3700	-2,142	-31	1,070
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	14.20	14.2000	-3,170	-45	0
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	20.87	20.8700	-3,200	-67	0
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	20.62	20.6200	-3,600	-74	0
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D			-4,525			20,729
2014-02-20	2014-02-19	4	Cerkovnik Robert M	FIBK	Class A Common Stock	M - Exercise	D		14.6700	6,146	90		25,254
2014-02-18	2014-02-13	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-111,430		0
2014-02-18	2014-02-13	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	C - Conversion	I			111,430			111,430
2014-02-18	2014-02-17	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		420		44,151
2014-02-18	2014-02-17	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		420		44,151
2014-02-18	2014-02-15	4	GARDING ED	FIBK	Class A Common Stock	A - Award	D			9,264			116,054
2014-02-18	2014-02-14	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		25.0900	20	1		106,790
2014-02-18	2014-02-17	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-166	-4		19,811
2014-02-18	2014-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			2,772			19,977
2014-02-18	2014-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-153	-4		17,205
2014-02-18	2014-02-14	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		25.2600	-168	-4		17,358
2014-02-18	2014-02-17	4	Huston Michael G.	FIBK	Class A Common Stock	D - Sale to Issuer	D		25.3600	-155	-4		8,863
2014-02-18	2014-02-15	4	Huston Michael G.	FIBK	Class A Common Stock	A - Award	D			3,264			9,018
2014-02-18	2014-02-15	4	Huston Michael G.	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-180	-5		5,754
2014-02-18	2014-02-14	4	Huston Michael G.	FIBK	Class A Common Stock	F - Taxes	D		25.2600	-154	-4		5,934
2014-02-18	2014-02-15	4	Cerkovnik Robert M	FIBK	Class A Common Stock	A - Award	D			2,430			19,228
2014-02-18	2014-02-15	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-65	-2		16,798
2014-02-18	2014-02-14	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		25.2600	-123	-3		16,863
2014-02-18	2014-02-07	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		25.3600	-120	-3		19,108
2014-02-18	2014-02-15	4	RILEY KEVIN P	FIBK	Class A Common Stock	A - Award	D			5,916			17,916
2014-01-02	2013-12-30	4	GARDING ED	FIBK	Class A Common Stock	D - Sale to Issuer	D			-4,224			106,770
2014-01-02	2013-12-30	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,748			17,526
2014-01-02	2013-12-30	4	Huston Michael G.	FIBK	Class A Common Stock	D - Sale to Issuer	D			-1,598			6,088
2013-11-26	2013-11-25	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-1,058		43,731
2013-11-26	2013-11-22	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-6,648		2,350,238
2013-11-26	2013-11-22	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-4,192			0
2013-11-22	2013-11-20	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-9,615		2,413,688
2013-11-22	2013-11-20	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-3,228		779,991
2013-11-20	2013-11-18	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		25.8400	17	0		110,994
2013-11-20	2013-11-20	4	Huston Michael G.	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-1,800	-31	1,800
2013-11-20	2013-11-20	4	Huston Michael G.	FIBK	Class A Common Stock	S - Sale	D		25.8585	-1,800	-47		7,686
2013-11-20	2013-11-20	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D		17.0000	1,800	31		9,486
2013-11-20	2013-11-19	4	Scott Jonathan R By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-7,700		783,219
2013-11-20	2013-11-19	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	C - Conversion	I			7,700			9,121
2013-11-20	2013-05-22	4	Scott Jonathan R By Trust	FIBK	Class A Common Stock	A - Award	I		20.8200	1,044	22		1,421
2013-11-18	2014-11-14	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	C - Conversion	D			2,897			19,274
2013-11-18	2013-11-14	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,897		2,354
2013-11-18	2013-11-14	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	F - Taxes	D	0.00		-21,103		5,251
2013-11-18	2013-11-14	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	M - Exercise	D	0.00	20.7450	24,000	498	26,354
2013-11-18	2013-11-14	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	20.62	20.6200	-12,000	-247	0
2013-11-18	2013-11-14	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	20.87	20.8700	-12,000	-250	0
2013-11-18	2013-11-15	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	J - Other	I			1,500			23,750
2013-11-18	2013-11-15	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	J - Other	I			-1,500			100,000
2013-11-18	2013-11-15	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-10,740		2,373,476
2013-11-18	2013-11-15	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		329		44,789
2013-11-18	2013-11-15	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		329		44,789
2013-11-06	2013-07-16	4	RILEY KEVIN P	FIBK	Class A Common Stock	J - Other	D			12,000			12,000
2013-11-05	2013-11-01	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		8,112		2,356,557
2013-11-05	2013-11-01	4	SCOTT JAMES R	FIBK	Class B Common Stock	J - Other	D	0.00		-8,112		0
2013-11-04	2013-10-31	4	SCOTT HOMER A JR	FIBK	Class A Common Stock	S - Sale	D		24.3600	-235,000	-5,725		0
2013-11-01	2013-10-30	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		5,100		171,456
2013-10-29	2013-10-25	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	J - Other	I			1,599			2,643
2013-10-29	2013-10-25	4	SCOTT RANDALL I	FIBK	Class A Common Stock	J - Other	D			-1,599			0
2013-10-29	2013-10-25	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-235,000		2,384,216
2013-10-29	2013-10-25	4	SCOTT HOMER A JR	FIBK	Class A Common Stock	C - Conversion	D			235,000			235,000
2013-10-28	2013-10-24	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		25.9478	10,000	259		30,000
2013-09-03	2013-08-30	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	G - Gift	I			-1,091			4,192
2013-09-03	2013-08-30	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		22.7704	10,000	228		20,000
2013-08-29	2013-08-27	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	P - Purchase	I		22.7700	1,326	30		101,500
2013-08-22	2013-08-21	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		23.8740	-1,115	-27		7,444
2013-08-22	2013-08-20	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		23.8759	-6,330	-151		8,559
2013-08-16	2013-08-16	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		354		2,348,445
2013-08-16	2013-08-16	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		354		2,348,445
2013-08-16	2013-08-16	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		23.5500	19	0		110,977
2013-08-13	2013-08-12	4	HAUGH JAMES W	FIBK	Class A Common Stock	J - Other	D			-1,996			0
2013-08-13	2013-08-12	4	HAUGH JAMES W By Trust	FIBK	Class A Common Stock	J - Other	I			1,996			40,627
2013-08-08	2013-08-07	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		23.3135	-1,600	-37		16,377
2013-08-08	2013-08-07	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		23.3705	-400	-9		17,977
2013-08-07	2013-08-07	4	HAUGH JAMES W By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-35,064		0
2013-08-07	2013-08-07	4	HAUGH JAMES W By Trust	FIBK	Class A Common Stock	C - Conversion	I			35,064			38,631
2013-08-07	2013-08-06	4	HAUGH JAMES W	FIBK	Class B Common Stock	C - Conversion	D	0.00		-1,100		0
2013-08-07	2013-08-06	4	HAUGH JAMES W	FIBK	Class B Common Stock	F - Taxes	D	0.00		-1,300		1,100
2013-08-07	2013-08-06	4	HAUGH JAMES W	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,400		2,400
2013-08-07	2013-08-06	4	HAUGH JAMES W	FIBK	Stock Options	M - Exercise	D	13.12	13.1200	-2,400	-31	0
2013-08-07	2013-08-06	4	HAUGH JAMES W	FIBK	Class A Common Stock	C - Conversion	D			1,100			1,996
2013-08-07	2013-08-07	4	RILEY KEVIN P By IRA	FIBK	Class A Common Stock	P - Purchase	I		23.6057	10,000	236		10,000
2013-07-31	2013-07-31	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-10,425		2,619,216
2013-07-31	2013-07-31	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			10,425			14,889
2013-07-31	2013-07-30	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	W - Other	I	0.00	23.9300	-150,500	-3,601	111,430
2013-07-30	2013-07-29	4	MOORE TERRILL R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,606		535
2013-07-30	2013-07-29	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-5,394		3,141
2013-07-30	2013-07-29	4	MOORE TERRILL R	FIBK	Class B Common Stock	M - Exercise	D	0.00		8,000		8,535
2013-07-30	2013-07-29	4	MOORE TERRILL R	FIBK	Stock Options	M - Exercise	D	12.37	12.3700	-8,000	-99	0
2013-07-30	2013-07-29	4	MOORE TERRILL R	FIBK	Class A Common Stock	C - Conversion	D			2,606			59,788
2013-07-30	2013-07-29	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	J - Other	I			4,000			22,250
2013-07-30	2013-07-29	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	J - Other	I			-4,000			100,174
2013-06-03		3	Scott Jonathan R	FIBK	Class A Common Stock		D						2,297
2013-06-03		3	Scott Jonathan R By Trust	FIBK	Class A Common Stock		I						377
2013-06-03	2013-05-31	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-100,000		261,930
2013-06-03	2013-05-31	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	S - Sale	I	0.00	20.0700	-99,650	-2,000	361,930
2013-06-03	2013-05-31	4	SCOTT RANDALL I by Trust	FIBK	Class B Common Stock	J - Other	I	0.00		19,930		166,356
2013-06-03	2013-05-31	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	S - Sale	I		19.7880	-24,500	-485		1,044
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Class B Common Stock	C - Conversion	D	0.00		-3,157		2,354
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Class B Common Stock	F - Taxes	D	0.00		-18,371		5,511
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Class B Common Stock	M - Exercise	D	0.00	16.1700	21,528	348	23,882
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	14.37	14.3700	-1,489	-21	2,977
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	14.20	14.2000	-2,894	-41	1,449
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	15.00	15.0000	-4,908	-74	0
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	15.25	15.2500	-4,620	-70	0
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-12,000	-204	0
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Class A Common Stock	C - Conversion	D			3,157			18,377
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D			-3,470			15,220
2013-05-29	2013-05-24	4/A	GUENTHNER KEVIN	FIBK	Class A Common Stock	M - Exercise	D		14.2600	4,383	63		18,690
2013-05-29		3	Williams Theodore H	FIBK	Class A Common Stock		D						1,044
2013-05-29		3	Williams Theodore H By SEP/IRA	FIBK	Class A Common Stock		I						403
2013-05-29	2013-05-28	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		20.7731	-523	-11		7,000
2013-05-29	2013-05-28	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		20.8961	-7,827	-164		4,464
2013-05-28	2013-05-17	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		20.6700	-1,000	-21		12,291
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	C - Conversion	D	0.00		-3,158		2,354
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	F - Taxes	D	0.00		-18,370		5,512
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	M - Exercise	D	0.00	16.1700	21,528	348	23,882
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	14.37	14.3700	-1,489	-21	2,977
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	14.20	14.2000	-2,894	-41	1,449
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	15.00	15.0000	-4,908	-74	0
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	15.25	15.2500	-4,620	-70	0
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-12,000	-204	0
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	C - Conversion	D			3,158			18,378
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D			-3,470			15,220
2013-05-28	2013-05-24	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	M - Exercise	D		14.2600	4,383	63		18,690
2013-05-24	2013-05-22	4	HAUGH JAMES W By Trust	FIBK	Class A Common Stock	A - Award	I		20.8200	1,044	22		3,567
2013-05-24	2013-05-22	4	EBZERY WILLIAM B	FIBK	Stock Option	A - Award	D	20.82	20.8200	2,214	46	2,214
2013-05-24	2013-05-22	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	A - Award	I		20.8200	1,482	31		104,174
2013-05-24	2013-05-22	4	Hart Charles E	FIBK	Stock Option	A - Award	D	20.82	20.8200	2,214	46	2,214
2013-05-24	2013-05-22	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		20.8200	1,843	38		14,842
2013-05-24	2013-05-22	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		20.8200	1,044	22		3,567
2013-05-24	2013-05-22	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		20.8200	2,005	42		59,940
2013-05-24	2013-05-22	4	Heyneman Charles M	FIBK	Class A Common Stock	A - Award	D		20.8200	1,044	22		8,567
2013-05-24	2013-05-22	4	HEYNEMAN JOHN M JR	FIBK	Stock Options	A - Award	D	20.82	20.8200	4,428	92	4,428
2013-05-24	2013-05-22	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		20.8200	1,044	22		7,391
2013-05-24	2013-05-22	4	SCOTT JAMES R By Trust	FIBK	Class A Common Stock	A - Award	I		20.8200	5,283	110		5,283
2013-05-24	2013-05-22	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	A - Award	I		20.8200	1,044	22		25,544
2013-05-24	2013-05-22	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		20.8200	1,044	22		22,151
2013-05-24	2013-05-22	4	SCOTT THOMAS W	FIBK	Class A Common Stock	A - Award	D		20.8200	5,043	105		5,043
2013-05-24	2013-05-22	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		20.8200	1,044	22		2,933
2013-05-24	2013-05-23	4	SULLIVAN MICHAEL J/CO	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,692		2,692
2013-05-24	2013-05-23	4	SULLIVAN MICHAEL J/CO	FIBK	Stock Options	M - Exercise	D	11.50	11.5000	-2,692	-31	0
2013-05-24	2013-05-22	4	SULLIVAN MICHAEL J/CO	FIBK	Class A Common Stock	A - Award	D		20.8200	1,044	22		1,968
2013-05-22	2013-05-20	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-24,500		461,580
2013-05-22	2013-05-20	4	SCOTT RANDALL I By Trust	FIBK	Class A Common Stock	C - Conversion	I			24,500			24,500
2013-05-22	2013-05-20	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		20.6686	-11,830	-245		13,291
2013-05-20	2013-05-18	4	SCOTT RANDALL I By Partnership	FIBK	Class B Common Stock	J - Other	I	0.00		803,310		803,310
2013-05-20	2013-05-18	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		486,080		486,080
2013-05-17	2013-05-16	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		20.6599	20	0		110,958
2013-05-16	2013-05-15	4	Leckie Ross E. By Spouse	FIBK	Class A Common Stock	S - Sale	I		20.4014	-3,500	-71		0
2013-05-16	2013-05-14	4	SCOTT JAMES R	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,692		8,112
2013-05-16	2013-05-14	4	SCOTT JAMES R	FIBK	Stock Options	M - Exercise	D	11.50	11.5000	-2,692	-31	0
2013-05-16	2013-05-14	4	SCOTT RANDALL I	FIBK	Class B Common Stock	F - Taxes	D	0.00		-1,532		1,616
2013-05-16	2013-05-14	4	SCOTT RANDALL I	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,692		3,148
2013-05-16	2013-05-14	4	SCOTT RANDALL I	FIBK	Stock Option	M - Exercise	D	11.50	11.5000	-2,692	-31	0
2013-05-16	2013-05-15	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		20.6700	-200	-4		25,121
2013-05-16	2013-05-15	4	SCOTT HOMER A JR By 401(k) Plan	FIBK	Class A Common Stock	S - Sale	I		20.4260	-0	-0		0
2013-05-15	2013-05-13	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		20.0970	-1,000	-20		7,523
2013-05-14	2013-05-10	4	EBZERY WILLIAM B	FIBK	Stock Option	M - Exercise	D	11.50	11.5000	-2,692	-31	0
2013-05-14	2013-05-10	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	M - Exercise	D		11.5000	2,692	31		8,112
2013-05-14	2013-05-13	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-12,291		2,629,641
2013-05-14	2013-05-13	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			12,291			25,321
2013-05-10	2013-05-08	4	MOORE TERRILL R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,100		535
2013-05-10	2013-05-08	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-5,900		2,635
2013-05-10	2013-05-08	4	MOORE TERRILL R	FIBK	Class B Common Stock	M - Exercise	D	0.00		8,000		8,535
2013-05-10	2013-05-08	4	MOORE TERRILL R	FIBK	Stock Options	M - Exercise	D	12.37	12.3700	-8,000	-99	8,000
2013-05-10	2013-05-08	4	MOORE TERRILL R	FIBK	Class A Common Stock	C - Conversion	D			2,100			57,182
2013-05-10	2013-05-08	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		403		2,348,091
2013-05-10	2013-05-08	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		403		2,348,091
2013-05-09	2013-05-07	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		20.1072	-13,030	-262		0
2013-05-08	2013-05-07	4	MOORE TERRILL R	FIBK	Class A Common Stock	S - Sale	D		20.0635	-2,000	-40		55,082
2013-05-07	2013-05-07	4	Cerkovnik Robert M	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,527		296
2013-05-07	2013-05-07	4	Cerkovnik Robert M	FIBK	Class A Common Stock	C - Conversion	D			2,527			16,986
2013-05-06	2013-05-02	4	CRUM DAVID H	FIBK	Stock Options	M - Exercise	D	11.50	11.5000	-2,692	-31	0
2013-05-06	2013-05-02	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	M - Exercise	I		11.5000	2,692	31		57,935
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Class B Common Stock	F - Taxes	D	0.00		-12,233		2,823
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Class B Common Stock	M - Exercise	D	0.00		14,760		15,056
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	12.37	12.3700	-4,000	-49	0
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	13.87	13.8700	-4,000	-55	0
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	17.00	17.0000	-3,600	-61	0
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	15.25	15.2500	-2,080	-32	0
2013-05-02	2013-04-30	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	15.00	15.0000	-1,080	-16	0
2013-05-02	2013-04-30	4	Huston Michael G.	FIBK	Stock Options	M - Exercise	D	13.87	13.8700	-3,600	-50	0
2013-05-02	2013-04-30	4	Huston Michael G.	FIBK	Class A Common Stock	S - Sale	D		20.0073	-3,600	-72		8,399
2013-05-02	2013-04-30	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D		13.8700	3,600	50		11,999
2013-05-01	2013-04-29	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-13,030		2,641,932
2013-05-01	2013-04-29	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			13,030			13,030
2013-05-01	2013-04-29	4	SCOTT THOMAS W	FIBK	Class B Common Stock	C - Conversion	D	0.00		-13,030		2,423,303
2013-05-01	2013-04-29	4	SCOTT THOMAS W	FIBK	Class A Common Stock	C - Conversion	D			13,030			13,030
2013-03-01	2013-02-27	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	P - Purchase	I		17.7350	814	14		94,580
2013-03-01	2013-02-27	4	MOORE TERRILL R By 401(k) Plan	FIBK	Class A Common Stock	S - Sale	I		17.8090	-2,000	-36		14,572
2013-02-25	2013-02-21	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		471		2,347,688
2013-02-25	2013-02-21	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		471		2,347,688
2013-02-22	2013-02-21	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		17.4801	-6,084	-106		0
2013-02-22	2013-02-20	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		17.4747	-9,647	-169		6,084
2013-02-20	2013-02-17	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		17.5300	-153	-3		14,307
2013-02-20	2013-02-17	4	Cerkovnik Robert M	FIBK	Class A Common stock	F - Taxes	D		17.5300	-120	-2		14,459
2013-02-20	2013-02-17	4	Huston Michael G.	FIBK	Class A Common Stock	F - Taxes	D		17.5300	-155	-3		8,180
2013-02-20	2013-02-17	4	MOORE TERRILL R	FIBK	Class A Common Stock	F - Taxes	D		17.5300	-359	-6		57,082
2013-02-20	2013-02-17	4	GARDING ED	FIBK	Class A Common Stock	F - Taxes	D		17.5300	-359	-6		110,939
2013-02-20	2013-02-19	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		17.6900	-800	-14		15,731
2013-02-19	2013-02-15	4	GARDING ED	FIBK	Stock Options	A - Award	D	17.22	17.2200	19,380	334	19,380
2013-02-19	2013-02-15	4	GARDING ED	FIBK	Class A Common Stock	A - Award	D			9,147			111,368
2013-02-19	2013-02-15	4	Cerkovnik Robert M	FIBK	Stock Options	A - Award	D	17.22	17.2200	2,503	43	2,503
2013-02-19	2013-02-15	4	Cerkovnik Robert M	FIBK	Class A Common Stock	A - Award	D			1,182			14,579
2013-02-19	2013-02-14	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D		17.3000	-123	-2		13,397
2013-02-19	2012-12-18	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		15.0700	27	0		102,221
2013-02-19	2012-10-18	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		15.1500	24	0		102,194
2013-02-19	2012-07-17	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		14.8900	25	0		10,470
2013-02-19	2013-02-15	4	Huston Michael G.	FIBK	Stock Options	A - Award	D	17.22	17.2200	6,933	119	6,933
2013-02-19	2013-02-15	4	Huston Michael G.	FIBK	Class A Common Stock	A - Award	D			3,270			8,335
2013-02-19	2013-02-14	4	Huston Michael G.	FIBK	Class A Common Stock	F - Taxes	D		17.3000	-154	-3		5,065
2013-02-19	2013-02-15	4	GUENTHNER KEVIN	FIBK	Stock Options	A - Award	D	17.22	17.2200	5,878	101	5,878
2013-02-19	2013-02-15	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	A - Award	D			2,772			14,460
2013-02-19	2013-02-14	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	F - Taxes	D		17.3000	-168	-3		11,688
2013-02-19	2013-02-14	4	MOORE TERRILL R	FIBK	Class A Common Stock	F - Taxes	D		17.3000	-363	-6		57,441
2013-02-19	2013-02-15	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		17.6902	-3,934	-70		16,531
2013-02-19	2013-02-15	4	SCOTT HOMER A JR By Spouse	FIBK	Class A Common Stock	S - Sale	I		17.5000	-1,150	-20		13,119
2013-02-19	2013-02-15	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		17.3700	-2,120	-37		0
2013-02-19	2013-02-14	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		17.2578	-10,726	-185		2,120
2013-02-13	2013-02-13	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		17.4000	-100	-2		12,846
2013-02-13	2013-02-12	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		17.4000	-100	-2		12,946
2013-02-13	2013-02-11	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		17.4000	-1,685	-29		13,046
2013-02-13	2013-02-13	4	Leckie Ross E.	FIBK	Class B Common Stock	C - Conversion	D	0.00		-15,472		0
2013-02-13	2013-02-13	4	Leckie Ross E.	FIBK	Class A Common Stock	C - Conversion	D			15,472			21,107
2013-02-11	2013-02-07	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-5,734		2,654,962
2013-02-11	2013-02-07	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			5,734			20,465
2013-02-06	2013-02-05	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	F - Taxes	D	0.00		-261		2,354
2013-02-06	2013-02-05	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Clas B Common Stock	C - Conversion	I	0.00		-18,250		0
2013-02-06	2013-02-05	4	EBZERY WILLIAM B By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-85,586		0
2013-02-06	2013-02-05	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	C - Conversion	D	0.00		-5,420		0
2013-02-06	2013-02-05	4	EBZERY WILLIAM B By Limited Partnership	FIBK	Class A Common Stock	C - Conversion	I			18,250			18,250
2013-02-06	2013-02-05	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	C - Conversion	I			85,586			93,766
2013-02-06	2013-02-05	4	EBZERY WILLIAM B	FIBK	Class A Common Stock	C - Conversion	D			5,420			5,420
2013-02-06	2013-02-05	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-337		4,027
2013-02-06	2013-02-04	4	SCOTT HOMER A JR By Spouse	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,269		2,047
2013-02-06	2013-02-04	4	SCOTT HOMER A JR By Spouse	FIBK	Class A Common Stock	C - Conversion	I			14,269			14,269
2013-02-06	2013-02-05	4	Leckie Ross E. By KEOGH	FIBK	Class A Common Stock	S - Sale	I		17.3200	-3,700	-64		0
2013-02-06	2013-02-05	4	Huston Michael G.	FIBK	Class B Common Stock	F - Taxes	D	0.00		-137		219
2013-02-06	2013-02-05	4	Huston Michael G.	FIBK	Stock Options	M - Exercise	D	12.37		-3,600		356
2013-02-06	2013-02-05	4	Huston Michael G.	FIBK	Class B Common Stock	M - Exercise	D	0.00		-3,600		356
2013-02-06	2013-02-05	4	Huston Michael G.	FIBK	Class B Common Stock	M - Exercise	D	0.00		3,600		3,956
2013-02-06	2013-02-05	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D		17.4393	-3,600	-63		5,219
2013-02-06	2013-02-05	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D			3,600			3,600
2013-02-05	2013-02-01	4	HAUGH JAMES W	FIBK	Class B Common Stock	F - Taxes	D	0.00		-1,796		35,960
2013-02-05	2013-02-01	4	HAUGH JAMES W	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,692		37,756
2013-02-05	2013-02-01	4	HAUGH JAMES W	FIBK	Stock Options	M - Exercise	D	11.50	11.5000	-2,692	-31	0
2013-02-05	2013-02-05	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		17.2900	-1,009	-17		11,856
2013-02-05	2013-02-01	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,198		2,615
2013-02-05	2013-02-01	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	F - Taxes	D	0.00		-12,602		4,813
2013-02-05	2013-02-01	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	M - Exercise	D	0.00		14,800		17,415
2013-02-05	2013-02-01	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	13.87	13.8700	-6,800	-94	0
2013-02-05	2013-02-01	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	12.37	12.3700	-8,000	-99	0
2013-02-05	2013-02-01	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	C - Conversion	D			2,198			12,865
2013-02-04	2012-11-30	4/A	SCOTT THOMAS W As Owner of Limited Liability Company	FIBK	Class B Common Stock	G - Gift	I	0.00		-200,275		222,528
2013-02-04	2012-08-24	4/A	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		14.2155	700	10		102,145
2013-02-04	2013-01-31	4	SCOTT THOMAS W	FIBK	Class B Common Stock	C - Conversion	D	0.00		-14,731		2,436,333
2013-02-04	2013-01-31	4	SCOTT THOMAS W	FIBK	Class A Common Stock	C - Conversion	D			14,731			14,731
2013-02-04	2013-01-31	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,731		2,660,696
2013-02-04	2013-01-31	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,731			14,731
2013-02-04	2012-11-21	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.4207	-5,000	-72		0
2013-02-04	2013-02-01	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		17.5000	-4,000	-70		8,523
2013-01-18	2013-01-17	4	Heyneman Charles M	FIBK	Class A Common Stock	S - Sale	D		16.0000	-4,000	-64		12,523
2013-01-18	2013-01-18	4	SUZOR SANDRA A SCOTT By Trust	FIBK	Class A Common Stock	S - Sale	I		16.0000	-11,401	-182		2,730
2013-01-18	2013-01-17	4	SUZOR SANDRA A SCOTT By Trust	FIBK	Class A Common Stock	S - Sale	I		16.0000	-3,599	-58		14,131
2013-01-04	2013-01-02	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		15.5000	-16,667	-258		0
2013-01-04	2013-01-02	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		15.5000	-10,000	-155		16,667
2013-01-04	2013-01-03	4	MOORE TERRILL R	FIBK	Class A Common Stock	S - Sale	D		15.7500	-1,533	-24		57,804
2013-01-04	2013-01-02	4	MOORE TERRILL R	FIBK	Class A Common Stock	S - Sale	D		15.7500	-467	-7		59,337
2013-01-04	2013-01-02	4	MOORE TERRILL R	FIBK	Class A Common Stock	S - Sale	D		15.5000	-2,000	-31		59,804
2013-01-04	2012-12-03	4	MOORE TERRILL R	FIBK	Class A Common Stock	S - Sale	D		15.2500	-4,000	-61		61,804
2013-01-04	2013-01-02	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	S - Sale	I		15.4401	-14,803	-229		0
2012-11-30	2012-11-30	4	SCOTT THOMAS W As Owner of Limited Liability Company	FIBK	Class B Common Stock	G - Gift	I	0.00		-200,275		222,528
2012-11-30	2012-11-30	4	MOORE TERRILL R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-4,161		4,364
2012-11-30	2012-11-30	4	MOORE TERRILL R	FIBK	Class A Common Stock	C - Conversion	D			4,161			65,804
2012-11-30	2012-11-30	4	SCOTT DAN S By Partnerships	FIBK	Class B Common Stock	G - Gift	I	0.00		39		1,209,039
2012-11-30	2012-11-30	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		15.2678	-6,511	-99		26,667
2012-11-29	2012-11-29	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-10,439		2,347,217
2012-11-29	2012-11-29	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	G - Gift	I	0.00		-1,896		43,232
2012-11-29	2012-11-27	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	S - Sale	D		14.9110	-1,000	-15		10,667
2012-11-26	2012-11-21	4	SCOTT RANDALL I By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-54		146,426
2012-11-26	2012-11-21	4	SCOTT DAN S By Partnerships	FIBK	Class B Common Stock	G - Gift	I	0.00		41,000		1,209,000
2012-11-26	2012-11-21	4	SCOTT DAN S By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-40,916		486,080
2012-11-26	2012-11-23	4	Huston Michael G.	FIBK	Stock Options	M - Exercise	D	11.25		-2,800		356
2012-11-26	2012-11-23	4	Huston Michael G.	FIBK	Clas B Common Stock	M - Exercise	D	0.00		-2,800		356
2012-11-26	2012-11-23	4	Huston Michael G.	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,800		3,156
2012-11-26	2012-11-23	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D		14.5179	-2,800	-41		5,219
2012-11-26	2012-11-23	4	Huston Michael G.	FIBK	Class A Common Stock	M - Exercise	D			2,800			8,019
2012-11-26	2012-11-21	4	SCOTT THOMAS W As Owner of Limited Liability Company	FIBK	Class B Common Stock	G - Gift	I	0.00		222,528		222,528
2012-11-26	2012-11-21	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-222,528		2,451,064
2012-11-20	2012-11-20	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.3423	-2,500	-36		5,000
2012-11-20	2012-11-19	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.2750	-5,000	-71		7,500
2012-11-19	2012-11-16	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		585		45,128
2012-11-19	2012-11-16	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		585		45,128
2012-11-15	2012-11-13	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		890		5,988
2012-11-15	2012-11-13	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		890		5,988
2012-11-15	2012-11-13	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-1,780		137,238
2012-11-15	2012-11-13	4	SCOTT THOMAS W	FIBK	Class B Common Stock	G - Gift	D	0.00		-17,460		2,673,592
2012-11-15	2012-11-13	4	SCOTT THOMAS W	FIBK	Class B Common Stock	F - Taxes	D	0.00		-30,645		2,691,052
2012-11-15	2012-11-13	4	SCOTT THOMAS W	FIBK	Class B Common Stock	M - Exercise	D	0.00		36,000		2,721,697
2012-11-15	2012-11-13	4	SCOTT THOMAS W	FIBK	Stock Options	M - Exercise	D	11.25	11.2500	-30,000	-338	0
2012-11-15	2012-11-13	4	SCOTT THOMAS W	FIBK	Stock Options	M - Exercise	D	11.25	11.2500	-6,000	-68	0
2012-11-15	2012-11-13	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-16,344		2,675,427
2012-11-13	2012-11-09	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.5370	-2,500	-36		12,500
2012-11-13	2012-11-09	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.3596	-1,450	-21		15,000
2012-11-13	2012-11-08	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.2500	-400	-6		16,450
2012-11-09	2012-11-09	4	EBZERY WILLIAM B By Trust	FIBK	Class A Common Stock	P - Purchase	I		14.2100	2,000	28		8,180
2012-11-09	2012-11-08	4	Cerkovnik Robert M	FIBK	Class B Common Stock	C - Conversion	D	0.00		-541		296
2012-11-09	2012-11-08	4	Cerkovnik Robert M	FIBK	Class B Common Stock	F - Taxes	D	0.00		-3,459		837
2012-11-09	2012-11-08	4	Cerkovnik Robert M	FIBK	Class B Common Stock	M - Exercise	D	0.00		4,000		4,296
2012-11-09	2012-11-08	4	Cerkovnik Robert M	FIBK	Stock Options	M - Exercise	D	11.25	11.2500	-4,000	-45	0
2012-11-09	2012-11-08	4	Cerkovnik Robert M	FIBK	Class A Common Stock	C - Conversion	D			541			13,520
2012-11-09	2012-11-09	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,803		123,184
2012-11-09	2012-11-09	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,803			14,803
2012-11-08	2012-11-07	4	MOORE TERRILL R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,107		8,525
2012-11-08	2012-11-07	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-9,893		10,632
2012-11-08	2012-11-07	4	MOORE TERRILL R	FIBK	Class B Common Stock	M - Exercise	D	0.00		12,000		20,525
2012-11-08	2012-11-07	4	MOORE TERRILL R	FIBK	Stock Options	M - Exercise	D	11.25	11.2500	-12,000	-135	0
2012-11-08	2012-11-02	4	MOORE TERRILL R	FIBK	Class A Common Stock	C - Conversion	D			2,107			61,643
2012-11-06	2012-11-05	4	MOORE TERRILL R	FIBK	Class A Common Stock	S - Sale	D		14.9370	-2,000	-30		59,536
2012-11-06	2012-11-02	4	MOORE TERRILL R	FIBK	Class B Common Stock	C - Conversion	D	0.00		-695		8,525
2012-11-06	2012-11-02	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-3,305		9,220
2012-11-06	2012-11-02	4	MOORE TERRILL R	FIBK	Class B Common Stock	M - Exercise	D	0.00		4,000		12,525
2012-11-06	2012-11-02	4	MOORE TERRILL R	FIBK	Stock Options	M - Exercise	D	11.25	11.2500	-4,000	-45	12,000
2012-11-06	2012-11-02	4	MOORE TERRILL R	FIBK	Class A Common Stock	C - Conversion	D			695			61,536
2012-11-05	2012-11-01	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	C - Conversion	D	0.00		-884		2,615
2012-11-05	2012-11-01	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	F - Taxes	D	0.00		-4,316		3,499
2012-11-05	2012-11-01	4	GUENTHNER KEVIN	FIBK	Class B Common Stock	M - Exercise	D	0.00		5,200		7,815
2012-11-05	2012-11-01	4	GUENTHNER KEVIN	FIBK	Stock Options	M - Exercise	D	11.25	11.2500	-5,200	-58	5,200
2012-11-05	2012-11-01	4	GUENTHNER KEVIN	FIBK	Class A Common Stock	C - Conversion	D			884			11,667
2012-11-02	2012-10-31	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-33,178		2,691,771
2012-11-02	2012-10-31	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			33,178			33,178
2012-11-01	2012-10-31	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-33,178		2,691,771
2012-11-01	2012-10-31	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			33,178			33,178
2012-10-26	2012-10-24	4	SCOTT THOMAS W	FIBK	Class B Common Stock	C - Conversion	D	0.00		-16,850		2,685,697
2012-10-26	2012-10-24	4	SCOTT THOMAS W	FIBK	Class A Common Stock	C - Conversion	D			16,850			16,850
2012-08-30	2012-08-28	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.2500	-826	-12		0
2012-08-30	2012-08-28	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.2418	-5,000	-71		0
2012-08-28	2012-08-24	4	GARDING ED	FIBK	Class A Common Stock	P - Purchase	D		14.2153	700	10		102,145
2012-08-28	2012-08-27	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.2486	-2,369	-34		5,000
2012-08-28	2012-08-24	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.2501	-131	-2		7,369
2012-08-28	2012-08-27	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.1873	-4,904	-70		826
2012-08-27	2012-08-24	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.1569	-6,031	-85		5,730
2012-08-27	2012-08-23	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.1536	-969	-14		11,761
2012-08-23	2012-08-22	4/A	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.1561	-3,190	-45		12,730
2012-08-23	2012-08-21	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.1819	-5,000	-71		7,500
2012-08-23	2012-08-22	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.1561	-3,190	-45		14,540
2012-08-23	2012-08-21	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.2167	-1,810	-26		15,920
2012-08-21	2012-08-20	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.0700	-2,500	-35		12,500
2012-08-17	2012-08-16	4	SCOTT HOMER A JR by 401(k) Plan	FIBK	Class A Common Stock	S - Sale	I		13.9444	-1,216	-17		26,194
2012-08-16	2012-08-15	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.0220	-500	-7		15,000
2012-08-15	2012-08-14	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		562		44,543
2012-08-15	2012-08-14	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		562		44,543
2012-08-08	2012-08-07	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.5228	-1,500	-22		15,500
2012-08-07	2012-08-06	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.2160	-500	-7		17,000
2012-08-06	2012-08-03	4	SCOTT THOMAS W	FIBK	Class A Common Stock	S - Sale	D		14.1614	-420	-6		17,500
2012-07-31	2012-07-30	4	SUZOR SANDRA A SCOTT By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-17,730		253,582
2012-07-31	2012-07-30	4	SUZOR SANDRA A SCOTT By Trust	FIBK	Class A Common Stock	C - Conversion	I			17,730			17,730
2012-07-31	2012-07-30	4	SCOTT HOMER A JR By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-17,730		2,724,949
2012-07-31	2012-07-30	4	SCOTT HOMER A JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			17,730			17,730
2012-07-27	2012-07-26	4	SCOTT THOMAS W	FIBK	Class B Common Stock	C - Conversion	D	0.00		-17,920		2,702,547
2012-07-27	2012-07-26	4	SCOTT THOMAS W	FIBK	Class A Common Stock	C - Conversion	D			17,920			17,920
2012-07-17	2012-07-13	4	Heyneman Charles M	FIBK	Class A Common Shares	S - Sale	D		14.7500	-2,000	-30		16,523
2012-06-25	2012-06-25	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.0050	-600	-8		0
2012-06-25	2012-06-22	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.1929	-6,140	-87		600
2012-06-25	2012-06-21	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	S - Sale	I		14.0178	-8,060	-113		6,740
2012-06-25	2012-06-22	4	Heyneman Charles M By Trust	FIBK	Class A Common Shares	S - Sale	I		14.2540	-2,000	-29		16,000
2012-06-07	2011-08-02	4/A	CRUM DAVID H By Trust	FIBK	Class A Common Stock	P - Purchase	I		13.7920	0	0		46,202
2012-06-07	2011-08-02	4/A	CRUM DAVID H By Trust	FIBK	Class A Common Stock	P - Purchase	I		13.8090	0	0		46,202
2012-06-07	2012-08-18	4/A	CRUM DAVID H By Trust	FIBK	Class A Common Stock	J - Other	I			2,984			49,186
2012-06-07	2012-04-18	4/A	CRUM DAVID H By Trust	FIBK	Class A Common Stock	C - Conversion	I			2,436			51,622
2012-06-07	2012-05-23	4/A	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		13.6000	3,621	49		55,243
2012-05-31	2012-05-31	4	SCOTT DAN S By Trust	FIBK	Class B Common Stock	G - Gift	I	0.00		-36,100		526,996
2012-05-31	2012-05-31	4	Heyneman Charles M By Trust	FIBK	Class A Common Stock	J - Other	I			-1,599			18,000
2012-05-31	2012-05-31	4	Heyneman Charles M	FIBK	Class A Common Stock	J - Other	D			1,599			2,523
2012-05-23	2012-05-23	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	A - Award	I		13.6000	3,621	49		55,492
2012-05-23	2012-05-23	4	Corning Steven J	FIBK	Class A Common Stock	A - Award	D		13.6000	1,599	22		2,523
2012-05-23	2012-05-23	4	EBZERY WILLIAM B	FIBK	Stock Options	A - Award	D	13.60	13.6000	5,801	79	5,801
2012-05-23	2012-05-23	4	HAUGH JAMES W By Self as Trustee	FIBK	Class A Common Stock	A - Award	I		13.6000	1,599	22		2,523
2012-05-23	2012-05-23	4	Heyneman Charles M By Trust	FIBK	Class A Common Stock	A - Award	I		13.6000	1,599	22		19,599
2012-05-23	2012-05-23	4	Hart Charles E	FIBK	Class A Common Stock	A - Award	D		13.6000	3,621	49		12,999
2012-05-23	2012-05-23	4	HEYNEMAN JOHN M JR	FIBK	Stock Options	A - Award	D	13.60	13.6000	5,801	79	5,801
2012-05-23	2012-05-23	4	PAYNE TERRY W	FIBK	Class A Common Stock	A - Award	D		13.6000	1,599	22		3,465
2012-05-23	2012-05-23	4	Jahnke David L	FIBK	Class A Common Stock	A - Award	D		13.6000	1,599	22		6,347
2012-05-23	2012-05-23	4	Leckie Ross E.	FIBK	Class A Common Stock	A - Award	D		13.6000	1,599	22		5,635
2012-05-23	2012-05-23	4	SULLIVAN MICHAEL J/CO	FIBK	Stock Options	A - Award	D	13.60	13.6000	5,801	79	5,801
2012-05-23	2012-05-23	4	SUZOR SANDRA A SCOTT By Trust	FIBK	Class A Common Stock	A - Award	I		13.6000	1,599	22		10,523
2012-05-23	2012-05-23	4	SCOTT RANDALL I	FIBK	Class A Common Stock	A - Award	D		13.6000	1,599	22		1,599
2012-05-23	2012-05-23	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		13.6000	1,599	22		1,889
2012-05-21	2012-05-18	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		558		43,981
2012-05-21	2012-05-18	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		558		43,981
2012-05-16	2012-05-15	4	PAYNE TERRY W	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,436		145,420
2012-05-16	2012-05-15	4	PAYNE TERRY W	FIBK	Stock Options	M - Exercise	D	11.00	11.0000	-2,436	-27	0
2012-05-16	2012-05-15	4	Huston Michael G.	FIBK	Class A Common Stock	J - Other	D			-1,116			5,219
2012-05-16	2012-05-15	4	Huston Michael G. By Trust	FIBK	Class A Common Stock	J - Other	I			1,116			14,698
2012-05-09	2012-05-07	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-18,000		139,018
2012-05-09	2012-05-07	4	Heyneman Charles M By Trust	FIBK	Class A Common Stock	C - Conversion	I			18,000			18,000
2012-05-07	2012-05-03	4/A	HEYNEMAN JOHN M JR by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,800		137,987
2012-05-07	2012-05-03	4/A	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,800			14,800
2012-05-07	2012-05-03	4	HEYNEMAN JOHN M JR by Trust	FIBK	Class B Common Stock	C - Conversion	I	0.00		-14,800		138,987
2012-05-07	2012-05-03	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class A Common Stock	C - Conversion	I			14,800			14,800
2012-05-02	2012-05-02	4	EBZERY WILLIAM B	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,436		5,420
2012-05-02	2012-05-02	4	EBZERY WILLIAM B	FIBK	Stock Options	M - Exercise	D	11.00	11.0000	-2,436	-27	0
2012-05-02	2012-05-01	4	SCOTT JAMES R	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,436		5,420
2012-05-02	2012-05-01	4	SCOTT JAMES R	FIBK	Stock Options	M - Exercise	D	11.00	11.0000	-2,436	-27	0
2012-04-20	2012-04-18	4	CRUM DAVID H	FIBK	Class B Common Stock	C - Conversion	D	0.00		-2,436		0
2012-04-20	2012-04-18	4	CRUM DAVID H	FIBK	Class B Common Stock	M - Exercise	D	0.00		2,436		2,436
2012-04-20	2012-04-18	4	CRUM DAVID H	FIBK	Stock Options	M - Exercise	D	11.00	11.0000	-2,436	-27	0
2012-04-20	2012-04-18	4	CRUM DAVID H By Trust	FIBK	Class A Common Stock	C - Conversion	I			2,436			51,871
2012-04-02		3	Huston Michael G. By 401(k) Plan	FIBK	Class A Common Stock		I						4,972
2012-04-02		3	Huston Michael G. By Trust	FIBK	Class A Common Stock		I						13,582
2012-04-02		3	Huston Michael G.	FIBK	Class A Common Stock		D						6,335
2012-04-02		3	GUENTHNER KEVIN	FIBK	Class A Common Stock		D						10,783
2012-04-02		3	GUENTHNER KEVIN By 401(k) Plan	FIBK	Class A Common Stock		I						8,760
2012-03-09	2012-03-08	4	HEYNEMAN JOHN M JR By Trust	FIBK	Class B Common Stock	W - Other	I	0.00		29,603		152,787
2012-03-09	2012-03-08	4	Heyneman Charles M By Trust	FIBK	Class B Common Stock	W - Other	I	0.00		29,603		157,018
2012-03-05	2012-02-17	4/A	GARDING ED	FIBK	Stock Options	A - Award	D	14.37	14.3700	12,375	178	12,375
2012-03-05	2012-02-17	4/A	GARDING ED	FIBK	Class A Common Stock	A - Award	D			8,384			101,445
2012-03-05	2012-03-02	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-239		8,525
2012-03-05	2012-02-14	4	GARDING ED	FIBK	Class A Common Stock	F - Taxes	D			-73			93,061
2012-03-05	2012-02-14	4	GARDING ED	FIBK	Class A Common Stock	A - Award	D			200			93,134
2012-02-21	2012-02-17	4	Cerkovnik Robert M	FIBK	Stock Options	A - Award	D	14.37	14.3700	3,212	46	3,212
2012-02-21	2012-02-17	4	Cerkovnik Robert M	FIBK	Class A Common Stock	A - Award	D			933			12,979
2012-02-21	2012-02-17	4	GARDING ED	FIBK	Stock Options	A - Award	D	14.37	14.3700	12,375	178	12,375
2012-02-21	2012-02-17	4	GARDING ED	FIBK	Class A Common Stock	A - Award	D			8,384			101,318
2012-02-21	2012-02-17	4	MOORE TERRILL R	FIBK	Stock Options	A - Award	D	14.37	14.3700	9,608	138	9,608
2012-02-21	2012-02-17	4	MOORE TERRILL R	FIBK	Class A Common Stock	A - Award	D			6,508			60,841
2012-02-17	2012-02-15	4	SCOTT JAMES R By Spouse	FIBK	Class B Common Stock	J - Other	I	0.00		555		43,423
2012-02-17	2012-02-15	4	SCOTT JAMES R By Trust	FIBK	Class B Common Stock	J - Other	I	0.00		555		43,423
2012-02-15	2012-02-14	4	Cerkovnik Robert M	FIBK	Class A Common Stock	F - Taxes	D			-116			12,046
2012-02-15	2012-02-14	4	MOORE TERRILL R	FIBK	Class A Common Stock	F - Taxes	D			-344			54,333
2012-02-15	2012-02-13	4	SUZOR SANDRA A SCOTT By Self as Trustee	FIBK	Class A Common Stock	S - Sale	I		14.2578	-8,000	-114		8,000
2012-02-09	2012-02-09	4	Taylor Teresa	FIBK	Class A Common Stock	A - Award	D		13.9300	290	4		290
2012-02-07	2012-02-05	4	WHEELER STEVEN E	FIBK	Class B Common Stock	F - Taxes	D	0.00		-246		1,614
2012-02-07	2012-02-05	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-319		8,764
2012-02-03	2012-02-01	4	MOORE TERRILL R	FIBK	Class B Common Stock	F - Taxes	D	0.00		-6,799		9,083
2012-02-03	2012-02-01	4	MOORE TERRILL R	FIBK	Class B Common Stock	M - Exercise	D	0.00		8,000		15,882
2012-02-03	2012-02-01	4	MOORE TERRILL R	FIBK	Stock Options	M - Exercise	D	10.50	10.5000	-8,000	-84	0
2012-01-09		3	WHEELER STEVEN E	FIBK	Class A Common Stock		D						3,703
2012-01-09		3	WHEELER STEVEN E By IRA	FIBK	Class A Common Stock		I						7,696
2012-01-09		3	WHEELER STEVEN E By 401(k) Plan	FIBK	Class A Common Stock		I						9,180
2012-01-04	2011-12-31	4	GARDING ED	FIBK	Class B Common Stock	D - Sale to Issuer	D	0.00		-2,708		5,876
2012-01-04	2011-12-31	4	MOORE TERRILL R	FIBK	Class B Common Stock	D - Sale to Issuer	D	0.00		-2,728		7,882
2011-08-11		3	Jahnke David L	FIBK	Class A Common Stock		D						4,000
2011-06-01		3	Heyneman Charles M	FIBK	Class A Common Stock		D						924
2011-06-01		3	Heyneman Charles M By 401(k) Plan	FIBK	Class A Common Stock		I						3,492
2010-11-19		3	SCOTT HOMER A JR By 401(k) Plan	FIBK	Class A Common Stock		I						28,836
2010-09-07		3	Cerkovnik Robert M By 401(k) Plan	FIBK	Class A Common Stock		I						5,248
2010-09-07		3	Cerkovnik Robert M By Spouse's 401(k) Plan	FIBK	Class A Common Stock		I						1,108
2009-05-18		3	Leckie Ross E.	N/A	Common Stock		D						302
2008-09-15		3	Castle Julie G	N/A	Common Stock		D						461
2008-05-12		3	Corning Steven J	N/A	Common Stock		D						89
2007-05-07		3	SUZOR SANDRA A SCOTT By Self As Trustee	N/A	Common Stock		I						83,100
2007-03-26		3	WHEELER STEVEN E By 401-K Plan	N/A	Common Stock		I						2,295
2007-03-26		3	WHEELER STEVEN E	N/A	Common Stock		D						1,233
2006-11-13		3	HICKEY MICHAEL JOHN Pershing, LLC, Custodian f/b/o Mike Hickey, IRA	N/A	Common Stock		I						256
2006-11-13		3	HICKEY MICHAEL JOHN	N/A	Common Stock		D						234
2006-11-13		3	HICKEY MICHAEL JOHN 401-K Plan	N/A	Common Stock		I						83
2006-05-12		3	Scott Jonathan R By Self as Trustee	N/A	Common Stock		I						218,335
2006-05-12		3	Scott Jonathan R By Spouse	N/A	Common Stock		I						7,453
2006-05-12		3	Scott Jonathan R By Child	N/A	Common Stock		I						161
2005-07-01		3	Huppert William A By 401(k) Plan	N/A	Common Stock		I						3,173
2005-07-01		3	Huppert William A	N/A	Common Stock		D						416
2005-05-10		3	WHITE MARTIN A	N/A	Common Stock		D						206
2004-08-02	2004-07-29	4	GUENTHNER KEVIN	N/A	Common Stock	A - Award	D			1,000			1,898
2004-06-01	2004-05-27	4	COBELL ELOUIS C	N/A	Stock Options	A - Award	D	52.50	52.5000	600	32	600
2004-06-01	2004-05-27	4	Heyneman Charles M As Trustee	N/A	Stock Options	A - Award	I	52.50	52.5000	600	32	600
2004-05-18		3	Heyneman Charles M As Trustee f/b/o Charles M. Heyneman	N/A	Common Stock		I						33,546
2004-05-18		3	Heyneman Charles M 401-K Plan	N/A	Common Stock		I						530
2004-02-06	2004-02-04	4	SCOTT JULIE A	N/A	Stock Options	A - Award	D	49.50	49.5000	400	20	400
2004-02-06	2004-02-04	4	GUENTHNER KEVIN	N/A	Stock Options	A - Award	D	49.50	49.5000	2,000	99	2,000
2004-02-06	2004-02-04	4	GUENTHNER KEVIN	N/A	Common Stock	A - Award	D		49.5000	64	3		898
2004-02-05	2004-02-04	4	CALAHAN DAVID R	N/A	Stock Options	A - Award	D	49.50	49.5000	2,000	99	2,000
2004-02-05	2004-02-04	4	CALAHAN DAVID R	N/A	Common Stock	A - Award	D		49.5000	115	6		5,034

Open market or private purchase of non-derivative or derivative security

Open market or private sale of non-derivative or derivative security

Grant, award, or other acquisition of securities from the company (such as an option)

Conversion of derivative

Sale or transfer of securities back to the company

Payment of exercise price or tax liability using portion of securities received from the company

Gift of securities by or to the insider

Equity swaps and similar hedging transactions

Exercise or conversion of derivative security received from the company (such as an option)

A transaction voluntarily reported on Form 4

Other (accompanied by a footnote describing the transaction)

FIBK / First Interstate BancSystem, Inc. - Insider Trading and Ownership Report - SEC Form 3, 4, 5