Introduction

This page provides a comprehensive analysis of the known insider trading history of Brian Charles Quirk. 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 Charles Quirk has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:MKSI / MKS Inc. Sr. VP, Global Operations 17,641
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 Charles Quirk. 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 Charles Quirk 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
2018-05-08 2018-05-07 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -2,000 17,641 -10.18 109.40 -218,800 1,929,880
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,230 4,621 -21.02
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,489 5,784 -20.47
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,157 5,851 -26.94
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,805 7,273 -27.83
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,773 8,008 -18.13
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,182 10,078 -17.79
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 2,250 6,871 48.70
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 3,375 9,159 58.36
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -3,858 19,641 -16.42 111.10 -428,624 2,182,069
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,230 23,499 5.52
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,489 22,269 7.17
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,157 20,780 11.58
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,805 18,623 17.73
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,773 15,818 12.63
2018-02-16 2018-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,182 14,044 18.39
2018-02-13 2018-02-12 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
J - Other -1,071 12,259 -8.03
2018-02-06 2018-02-05 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -2,000 11,863 -14.43 105.10 -210,200 1,246,789
2017-11-07 2017-11-06 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -2,000 13,785 -12.67 107.90 -215,800 1,487,398
2017-08-09 2017-08-08 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -2,000 15,785 -11.25 79.30 -158,600 1,251,748
2017-05-12 2017-05-11 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -3,558 13,330 -21.07
2017-05-12 2017-05-11 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,565 17,556 -8.18 80.50 -125,982 1,413,243
2017-05-12 2017-05-11 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 3,558 19,121 22.86
2017-05-11 2017-05-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -2,000 15,563 -11.39 80.00 -160,000 1,245,036
2017-04-04 2017-04-03 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 17,563 -5.39 68.75 -68,750 1,207,452
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,157 9,781 -18.07
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,804 16,888 -14.24
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,773 11,938 -12.93
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,181 19,692 -9.97
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 3,693 13,711 36.86
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 5,539 21,873 33.91
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -2,894 18,563 -13.49 67.70 -195,924 1,256,711
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,157 21,457 11.18
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,804 19,300 17.00
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,773 16,496 12.04
2017-02-16 2017-02-15 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,181 14,723 17.39
2017-02-14 2017-02-13 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
J - Other -1,294 16,334 -7.34
2017-02-14 2017-02-10 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,009 10,018 -16.71
2017-02-14 2017-02-10 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -3,013 17,628 -14.60
2017-02-14 2017-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,690 12,542 -11.87 66.95 -113,146 839,683
2017-02-14 2017-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,009 14,232 16.44
2017-02-14 2017-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 3,013 12,223 32.72
2017-02-02 2017-02-01 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 9,210 -9.79 66.60 -66,600 613,354
2016-12-05 2016-12-01 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 10,210 -8.92 57.40 -57,400 586,026
2016-10-04 2016-10-03 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 11,210 -8.19 49.36 -49,360 553,302
2016-08-04 2016-08-03 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 12,210 -7.57 45.17 -45,170 551,504
2016-07-06 2016-07-05 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 3,558 20,642 20.83
2016-05-17 2016-05-16 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 13,210 -7.04 36.25 -36,250 478,845
2016-03-21 2016-03-18 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 14,210 -6.57 36.00 -36,000 511,543
2016-02-29 2016-02-25 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,982 12,027 -14.14
2016-02-29 2016-02-25 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,695 17,084 -13.63
2016-02-29 2016-02-25 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,519 15,210 -9.08 32.77 -49,778 498,416
2016-02-29 2016-02-25 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,982 16,729 13.44
2016-02-29 2016-02-25 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,695 14,747 22.36
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 6,472 14,009 85.87
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 9,708 19,779 96.40
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,773 7,537 -19.04
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,180 10,071 -17.79
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,284 12,052 -9.63 33.22 -42,654 400,369
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,773 13,336 15.33
2016-02-18 2016-02-16 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,180 11,563 23.23
2016-02-12 2016-02-10 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,009 9,310 -17.75
2016-02-12 2016-02-10 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -3,013 12,251 -19.74
2016-02-12 2016-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,741 9,383 -15.65 32.70 -56,931 306,825
2016-02-12 2016-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,009 11,124 22.04
2016-02-12 2016-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 3,013 9,115 49.38
2016-01-29 2016-01-28 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 6,102 -14.08 36.00 -36,000 219,674
2016-01-28 2016-01-26 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
J - Other -1,436 15,264 -8.60
2015-12-17 2015-12-16 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,000 7,102 -12.34 36.03 -36,030 255,887
2015-04-03 2015-04-02 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,469 11,319 -17.91
2015-04-03 2015-04-02 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -803 8,102 -9.02 33.74 -27,093 273,363
2015-04-03 2015-04-02 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,469 8,905 38.37 33.74 83,318 300,456
2015-02-26 2015-02-25 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -1,981 13,788 -12.56
2015-02-26 2015-02-25 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,695 16,700 -13.89
2015-02-26 2015-02-25 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,520 6,436 -19.11 35.83 -54,462 230,589
2015-02-26 2015-02-25 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 1,981 7,956 33.16
2015-02-26 2015-02-25 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,695 5,975 82.15 35.83 96,549 214,071
2015-02-19 2015-02-17 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 5,319 15,769 50.90
2015-02-19 2015-02-17 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
A - Award 7,979 19,395 69.89
2015-02-11 2015-02-10 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,008 10,450 -16.12
2015-02-11 2015-02-10 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -3,013 11,416 -20.88
2015-02-11 2015-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -1,741 3,280 -34.67 35.86 -62,432 117,621
2015-02-11 2015-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,008 5,021 66.64
2015-02-11 2015-02-10 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 3,013 3,013
2015-02-02 2015-01-30 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,041 1 -99.93 36.09 -37,570 28
2015-01-26 2015-01-23 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,040 1,042 -49.96 34.76 -36,150 36,212
2015-01-20 2015-01-16 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,040 2,082 -33.31 33.10 -34,424 68,907
2014-12-15 2014-12-12 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,041 3,122 -25.01 35.97 -37,445 112,290
2014-12-08 2014-12-05 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,040 4,163 -19.99 36.17 -37,617 150,567
2014-11-24 2014-11-21 4 MKSI MKS INSTRUMENTS INC
Common Stock
S - Sale X -1,040 5,203 -16.66 36.30 -37,752 188,861
2014-04-14 2014-04-11 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,113 12,458 -14.50
2014-04-14 2014-04-11 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -688 6,243 -9.93 28.00 -19,264 174,798
2014-04-14 2014-04-11 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,113 6,931 43.86
2014-04-03 2014-04-02 4 MKSI MKS INSTRUMENTS INC
Restricted Stock Unit
M - Exercise -2,469 14,571 -14.49
2014-04-03 2014-04-02 4 MKSI MKS INSTRUMENTS INC
Common Stock
F - Taxes X -804 4,818 -14.30 30.70 -24,683 147,901
2014-04-03 2014-04-02 4 MKSI MKS INSTRUMENTS INC
Common Stock
M - Exercise 2,469 5,622 78.32
2014-03-06 3 MKSI MKS INSTRUMENTS INC
Common Stock
6,305
2014-03-06 3 MKSI MKS INSTRUMENTS INC
Common Stock
6,305
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)