Introduction

This page provides a comprehensive analysis of the known insider trading history of Brian C Witherow. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, 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. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Brian C Witherow has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
Chief Financial Officer 314,234
US:FUN / Six Flags Entertainment Corporation Executive VP & CFO 0
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Brian C Witherow. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Trading History

This table shows the complete list of insider trades made by Brian C Witherow as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change
Share
Price
Tran
Value
Remaining
Value
2025-06-05 2025-06-04 4 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
F - Taxes -11,245 314,234 -3.45 33.11 -372,322 10,404,288
2025-04-02 2025-03-31 4 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
F - Taxes -1,543 325,479 -0.47 35.42 -54,653 11,528,466
2025-02-26 2025-02-24 4 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
F - Taxes -29,528 327,022 -8.28 45.09 -1,331,418 14,745,422
2025-02-07 2025-02-05 4 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
A - Award 18,729 356,550 5.54
2024-12-06 2024-12-04 4 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
F - Taxes -11,245 337,821 -3.22 47.21 -530,876 15,948,529
2024-07-01 2024-07-01 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
D - Sale to Issuer -2,399 0 -100.00
2024-07-01 2024-07-01 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
D - Sale to Issuer -188,249 0 -100.00
2024-07-01 3 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
349,066
2024-07-01 3 FUN Six Flags Entertainment Corporation/NEW
Common Stock, par value $0.01 per share
2,399
2024-03-29 2024-03-28 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 10,490 188,151 5.90
2024-02-28 2024-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -4,985 177,661 -2.73 39.24 -195,611 6,971,418
2024-02-28 2024-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 11,239 182,646 6.56
2024-02-28 2024-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -4,014 171,407 -2.29 39.24 -157,509 6,726,011
2023-03-01 2023-02-27 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -3,659 173,194 -2.07 46.30 -169,412 8,018,882
2023-02-22 2023-02-20 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -24,548 176,853 -12.19 44.95 -1,103,433 7,949,542
2023-02-22 2023-02-20 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 27,092 201,401 15.54 36.95 1,001,049 7,441,767
2023-02-13 2023-02-09 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 10,028 174,309 6.10
2022-03-23 2022-03-21 4 FUN CEDAR FAIR L P
call options to purchase limited partnership units
M - Exercise -17,786 0 -100.00
2022-03-23 2022-03-21 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -13,226 162,198 -7.54 55.86 -738,804 9,060,380
2022-03-23 2022-03-21 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 17,786 175,424 11.28 29.53 525,221 5,180,271
2022-03-02 2022-02-28 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -5,996 157,638 -3.66 57.07 -342,192 8,996,401
2022-03-02 2022-02-28 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -3,619 163,634 -2.16 57.07 -206,536 9,338,592
2022-02-25 2022-02-23 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 7,444 167,253 4.66
2021-03-26 2021-03-24 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 8,968 159,752 5.95 47.46 425,621 7,581,830
2021-02-26 2021-02-24 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 13,034 150,784 9.46
2021-02-26 2021-02-24 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -3,949 137,750 -2.79 47.66 -188,209 6,565,165
2021-02-26 2021-02-24 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 8,642 141,699 6.49
2021-02-24 2021-02-22 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -3,202 133,057 -2.35 46.48 -148,829 6,184,489
2020-03-06 2020-03-06 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
P - Purchase 5,000 130,669 3.98 37.73 188,650 4,930,141
2020-02-26 2020-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -4,038 125,669 -3.11 47.78 -192,936 6,004,465
2020-02-26 2020-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 8,845 129,707 7.32
2020-02-26 2020-02-24 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -2,958 120,862 -2.39 52.76 -156,064 6,376,679
2019-11-01 2019-10-30 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 7,656 116,961 7.00 55.59 425,597 6,501,862
2019-02-27 2019-02-27 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -4,441 109,305 -3.90 52.61 -233,641 5,750,536
2019-02-27 2019-02-27 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 9,730 113,746 9.35
2019-02-27 2019-02-25 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -2,776 104,016 -2.60 52.56 -145,907 5,467,081
2018-11-02 2018-10-31 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 7,178 101,576 7.60 51.57 370,169 5,238,274
2018-03-02 2018-02-28 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -5,003 94,398 -5.03 67.14 -335,901 6,337,882
2018-03-02 2018-02-28 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 10,962 99,401 12.39
2018-02-28 2018-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -2,507 88,439 -2.76 68.13 -170,802 6,025,349
2017-10-27 2017-10-25 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 5,834 87,356 7.16 62.20 362,875 5,433,543
2017-03-07 2017-03-03 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -5,372 81,522 -6.18 67.35 -361,804 5,490,507
2017-03-07 2017-03-03 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 11,145 86,894 14.71
2016-10-28 2016-10-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 6,132 72,545 9.23 57.45 352,283 4,167,710
2016-03-04 2016-03-02 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -2,717 66,413 -3.93 57.94 -157,423 3,847,969
2016-03-04 2016-03-02 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 9,057 69,130 15.08
2015-10-30 2015-10-28 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 6,000 57,928 11.55 58.00 348,000 3,359,824
2015-10-27 2015-10-25 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -3,164 51,928 -5.74 58.00 -183,512 3,011,824
2015-02-27 2015-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -431 55,092 -0.78 55.68 -23,998 3,067,523
2015-02-27 2015-02-25 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 4,915 55,523 9.71
2015-02-27 2015-02-25 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 4,153 50,608 8.94
2015-01-05 2014-12-31 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
F - Taxes -1,888 44,959 -4.03 47.49 -89,661 2,135,103
2014-03-12 2014-03-10 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 4,140 46,847 9.69
2013-11-08 2013-11-06 4 FUN CEDAR FAIR L P
Call options to purchase limited partnership units
M - Exercise -200 0 -100.00 13.20 -2,640
2013-11-08 2013-11-06 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 200 41,253 0.49 13.20 2,640 544,540
2013-03-14 2013-03-12 4 FUN CEDAR FAIR L P
Call options to purchase limited partnership units
M - Exercise -1,000 0 -100.00 28.45 -28,450
2013-03-14 2013-03-12 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 1,000 41,053 2.50 28.45 28,450 1,167,958
2013-03-12 2013-03-08 4 FUN CEDAR FAIR L P
Phantom Units
M - Exercise -7,685 0 -100.00
2013-03-12 2013-03-08 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
D - Sale to Issuer -2,305 40,053 -5.44 38.35 -88,397 1,536,033
2013-03-12 2013-03-08 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 7,685 42,358 22.16
2013-03-01 2013-02-26 4 FUN CEDAR FAIR L P
Call options to purchase limited partnership units
A - Award 27,092 27,092 36.95 1,001,049 1,001,049
2013-03-01 2013-02-26 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 2,544 34,673 7.92
2012-10-29 2012-10-25 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 9,854 31,358 45.82
2012-06-18 2012-06-15 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
P - Purchase 500 21,504 2.38 28.00 14,000 602,112
2012-06-18 2012-06-14 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
P - Purchase 2,000 21,004 10.52 27.75 55,500 582,861
2012-03-29 2012-03-27 4 FUN CEDAR FAIR L P
Call options to purchase limited partnership units
A - Award 17,786 17,786 29.53 525,221 525,221
2012-03-29 2012-03-27 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
A - Award 5,926 19,004 45.31
2012-03-15 2012-03-13 4 FUN CEDAR FAIR L P
Phantom Units
M - Exercise -7,685 7,685 -50.00
2012-03-15 2012-03-13 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
D - Sale to Issuer -3,074 13,078 -19.03 27.99 -86,041 366,053
2012-03-15 2012-03-13 4 FUN CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 7,685 16,152 90.76
2012-02-16 2012-02-14 4 811532 CEDAR FAIR L P
Call options to purchase limited partnership units
M - Exercise -1,000 0 -100.00 22.65 -22,650
2012-02-16 2012-02-14 4 811532 CEDAR FAIR L P
Units of Limited Partner Interest
M - Exercise 181 8,467 2.18 22.65 4,100 191,778
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)