Introduction

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

Security Title Latest Reported Holdings
US:EXAS / Exact Sciences Corporation SVP, General Counsel & Sec 15,585
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by James Herriott. 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 James Herriott 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
2025-05-08 2025-04-30 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 363 15,585 2.38 38.26 13,888 596,282
2025-03-04 2025-02-28 4 EXAS EXACT SCIENCES CORP
Common Stock
F - Taxes -1,117 15,222 -6.84 47.82 -53,415 727,916
2025-03-04 2025-02-28 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 2,375 16,339 17.01
2025-03-04 2025-02-28 4 EXAS EXACT SCIENCES CORP
Common Stock
F - Taxes -889 13,964 -5.99 47.82 -42,512 667,758
2025-03-04 2025-02-28 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 1,890 14,853 14.58
2025-02-26 2025-02-25 4 EXAS EXACT SCIENCES CORP
Common Stock
F - Taxes -775 12,963 -5.64 51.28 -39,742 664,743
2025-02-26 2025-02-25 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 1,647 13,738 13.62
2025-02-21 2025-02-20 4 EXAS EXACT SCIENCES CORP
Common Stock
F - Taxes -1,531 12,091 -11.24 50.48 -77,285 610,354
2025-02-21 2025-02-20 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 3,324 13,622 32.28
2025-02-21 2025-02-19 4 EXAS EXACT SCIENCES CORP
Common Stock
F - Taxes -433 10,298 -4.04 49.63 -21,490 511,090
2025-02-21 2025-02-19 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 865 10,731 8.77
2024-05-02 2024-05-01 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -30 9,866 -0.30 60.15 -1,804 593,440
2024-05-02 2024-04-30 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 708 9,896 7.71 30.02 21,254 297,078
2024-05-02 2024-04-30 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 63 9,188 0.69
2024-03-04 2024-03-01 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -862 9,125 -8.63 59.32 -51,134 541,295
2024-03-04 2024-02-29 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 1,890 9,987 23.34
2024-02-28 2024-02-27 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -784 8,097 -8.83 56.89 -44,602 460,638
2024-02-28 2024-02-26 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 1,648 8,881 22.78
2024-02-23 2024-02-22 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -291 7,233 -3.87 59.78 -17,396 432,389
2024-02-23 2024-02-21 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 581 7,524 8.37
2024-02-22 2024-02-21 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -415 6,943 -5.64 61.50 -25,522 426,994
2024-02-22 2024-02-20 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 864 7,358 13.30
2024-02-16 2024-02-15 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -421 6,494 -6.09 61.43 -25,862 398,926
2024-02-16 2024-02-14 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 883 6,915 14.64
2024-02-16 2023-10-31 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 68 6,032 1.14 30.02 2,041 181,081
2023-07-21 2023-07-19 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -1,300 5,964 -17.90 100.00 -130,000 596,400
2023-06-12 2023-06-08 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -1,300 7,264 -15.18 90.00 -117,000 653,760
2023-05-12 2023-05-10 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -1,300 8,564 -13.18 79.85 -103,805 683,835
2023-05-12 2023-05-01 4 EXAS EXACT SCIENCES CORP
Common Stock
A - Award 640 9,864 6.94 30.02 19,213 296,117
2023-03-01 2023-02-28 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -875 9,224 -8.66 61.12 -53,480 563,771
2023-03-01 2023-02-28 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -1,350 10,099 -11.79 59.98 -80,973 605,738
2023-03-01 2023-02-27 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 240 11,449 2.14
2023-03-01 2023-02-27 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 1,647 11,209 17.22
2023-02-23 2023-02-22 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -398 9,562 -4.00 62.72 -24,963 599,729
2023-02-23 2023-02-21 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 865 9,960 9.51
2023-02-16 2023-02-15 4 EXAS EXACT SCIENCES CORP
Common Stock
S - Sale X -400 9,095 -4.21 65.59 -26,236 596,541
2023-02-16 2023-02-14 4 EXAS EXACT SCIENCES CORP
Common Stock
M - Exercise 883 9,495 10.25
2022-12-30 3 EXAS EXACT SCIENCES CORP
Common Stock
8,612
2022-12-30 3 EXAS EXACT SCIENCES CORP
Common Stock
613
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)