Introduction

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

Security Title Latest Reported Holdings
US:EBTC / Enterprise Bancorp, Inc. EVP - Principal Subsidiary 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 H Bullock. 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 H Bullock 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
2025-07-01 2025-07-01 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
D - Sale to Issuer -3,017 0 -100.00
2025-07-01 2025-07-01 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
D - Sale to Issuer -66,767 0 -100.00
2025-07-01 2025-07-01 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -1,237 66,767 -1.82 39.64 -49,035 2,646,644
2025-04-22 2025-04-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -86 68,004 -0.13 35.03 -3,013 2,382,180
2025-03-20 2025-03-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 1,767 68,090 2.66
2025-03-18 2025-03-16 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -82 66,323 -0.12 39.53 -3,241 2,621,748
2025-02-20 2025-02-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -353 66,405 -0.53 43.17 -15,239 2,866,704
2025-02-20 2025-02-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 530 66,758 0.80 21.03 11,146 1,403,921
2025-01-30 2025-01-28 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -168 66,228 -0.25 42.53 -7,145 2,816,677
2024-04-25 2024-04-23 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -86 66,396 -0.13 24.43 -2,101 1,622,054
2024-03-21 2024-03-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 2,209 66,482 3.44
2024-03-04 2024-02-29 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -991 64,273 -1.52 27.79 -27,540 1,786,147
2024-03-04 2024-02-29 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 1,203 65,264 1.88 20.29 24,409 1,324,207
2024-01-29 2024-01-25 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -140 64,061 -0.22 29.83 -4,176 1,910,940
2023-07-27 2023-07-25 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -67 64,201 -0.10 30.30 -2,030 1,945,290
2023-04-27 2023-04-25 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -58 64,268 -0.09 28.45 -1,650 1,828,425
2023-03-23 2023-03-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 1,161 64,326 1.84
2023-03-01 2023-02-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -973 63,165 -1.52 35.56 -34,600 2,246,147
2023-03-01 2023-02-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 1,500 64,138 2.39 16.43 24,645 1,053,787
2023-01-30 2023-01-26 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -72 62,638 -0.11 35.50 -2,556 2,223,649
2022-10-24 2022-10-20 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -130 62,710 -0.21 29.79 -3,873 1,868,131
2022-07-25 2022-07-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -58 62,840 -0.09 32.63 -1,893 2,050,469
2022-07-25 2022-06-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
G - Gift -50 62,898 -0.08
2022-03-17 2022-03-15 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
A - Award 391 391
2022-03-17 2022-03-15 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 826 62,948 1.33
2022-01-31 2022-01-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -153 62,122 -0.25 41.79 -6,394 2,596,078
2021-10-25 2021-10-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -112 62,275 -0.18 37.54 -4,204 2,337,804
2021-04-26 2021-04-22 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -130 62,387 -0.21 33.40 -4,342 2,083,726
2021-03-18 2021-03-16 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
A - Award 376 376
2021-03-18 2021-03-16 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 779 62,517 1.26
2021-02-01 2021-01-28 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -65 61,738 -0.11 25.87 -1,682 1,597,162
2020-04-29 2020-04-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -62 61,803 -0.10 26.01 -1,613 1,607,496
2020-03-19 2020-03-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 537 537
2020-03-19 2020-03-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 903 61,865 1.48 28.22 25,483 1,745,830
2020-01-27 2020-01-23 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -139 60,962 -0.23 32.10 -4,462 1,956,880
2019-07-22 2019-07-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -62 61,101 -0.10 29.47 -1,827 1,800,646
2019-07-22 2019-07-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
G - Gift -50 61,163 -0.08
2019-04-19 2019-04-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -55 61,213 -0.09 29.99 -1,649 1,835,778
2019-04-19 2019-04-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -86 61,268 -0.14 29.02 -2,496 1,777,997
2019-03-21 2019-03-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 519 519
2019-03-21 2019-03-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 854 61,354 1.41
2019-03-08 2019-03-06 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
M - Exercise -1,500 0 -100.00
2019-03-08 2019-03-06 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -1,051 60,500 -1.71 30.07 -31,604 1,819,235
2019-03-08 2019-03-06 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 1,500 61,551 2.50 16.25 24,375 1,000,204
2019-02-11 2018-10-25 5 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
G - Gift -50 60,051 -0.08
2018-10-19 2018-10-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -61 60,101 -0.10 31.64 -1,930 1,901,596
2018-10-19 2018-10-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -85 60,162 -0.14 30.60 -2,601 1,840,957
2018-07-20 2018-07-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -89 60,247 -0.15 37.86 -3,370 2,280,951
2018-04-23 2018-04-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -61 60,336 -0.10 36.86 -2,248 2,223,985
2018-03-22 2018-03-20 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 375 375
2018-03-22 2018-03-20 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 743 60,397 1.25
2018-01-26 2018-01-24 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -229 59,654 -0.38 34.81 -7,971 2,076,556
2017-10-20 2017-10-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -98 59,883 -0.16 37.20 -3,646 2,227,648
2017-10-20 2017-05-31 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
G - Gift -50 59,981 -0.08
2017-04-21 2017-04-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -205 60,031 -0.34 34.43 -7,058 2,066,867
2017-03-23 2017-03-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 397 397
2017-03-23 2017-03-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 837 60,236 1.41
2017-01-27 2017-01-25 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -343 59,399 -0.57 37.00 -12,691 2,197,763
2017-01-05 2017-01-04 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
M - Exercise -1,500 0 -100.00
2017-01-05 2017-01-04 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
M - Exercise -1,750 0 -100.00
2017-01-05 2017-01-04 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -921 59,742 -1.52 39.00 -35,919 2,329,938
2017-01-05 2017-01-04 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 1,500 60,663 2.54 14.85 22,275 900,846
2017-01-05 2017-01-04 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -1,009 59,163 -1.68 39.00 -39,351 2,307,357
2017-01-05 2017-01-04 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 1,750 60,172 3.00 12.51 21,892 752,752
2017-01-05 2016-11-09 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
G - Gift -50 58,422 -0.09
2016-04-22 2016-04-20 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -205 58,472 -0.35 24.33 -4,988 1,422,624
2016-03-18 2016-03-16 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -181 58,677 -0.31 22.27 -4,031 1,306,737
2016-03-17 2016-03-15 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 571 571
2016-03-17 2016-03-15 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 1,166 58,858 2.02
2016-03-10 2016-03-08 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
M - Exercise -2,000 0 -100.00
2016-03-10 2016-03-08 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -1,231 57,692 -2.09 22.82 -28,091 1,316,531
2016-03-10 2016-03-08 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 2,000 58,923 3.51 8.75 17,500 515,576
2016-01-29 2016-01-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -253 56,923 -0.44 20.47 -5,179 1,165,214
2015-03-19 2015-03-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 530 530
2015-03-19 2015-03-17 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 1,212 57,176 2.17
2015-03-12 2015-03-10 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
M - Exercise -3,500 0 -100.00
2015-03-12 2015-03-10 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
S - Sale -2,687 55,964 -4.58 20.41 -54,851 1,142,416
2015-03-12 2015-03-10 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 3,500 58,651 6.35 12.75 44,625 747,800
2014-03-20 2014-03-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 1,203 1,203
2014-03-20 2014-03-18 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 1,478 55,151 2.75
2014-03-03 2014-02-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to Buy)
M - Exercise -3,000 0 -100.00
2014-03-03 2014-02-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -2,644 53,673 -4.69 18.72 -49,496 1,004,759
2014-03-03 2014-02-27 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 3,000 56,317 5.63 16.50 49,500 929,230
2014-01-23 2014-01-21 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 119 53,317 0.22 20.95 2,493 1,116,991
2013-07-25 2013-07-23 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
F - Taxes -4,261 53,198 -7.42 21.92 -93,422 1,166,366
2013-07-25 2013-07-23 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
M - Exercise 6,500 57,459 12.76 14.38 93,438 825,973
2013-03-21 2013-03-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Option (Right to Buy)
A - Award 1,500 1,500
2013-03-21 2013-03-19 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 2,535 50,959 5.24
2012-03-22 2012-03-20 4 EBTC ENTERPRISE BANCORP INC /MA/
Stock Option (Right to buy)
A - Award 1,500 1,500
2012-03-22 2012-03-20 4 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
A - Award 2,300 48,424 4.99
2009-04-30 3 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
35,679
2009-04-30 3 EBTC ENTERPRISE BANCORP INC /MA/
Common Stock
2,419
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)