The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Shaff Eric D. since 2016.
This trader's CIK number is 1643734.
At the time of last reporting, Shaff Eric D. was the Officer of Seres Therapeutics, Inc.. (stock ticker symbol MCRB).
Also see all insider trading activities at Seres Therapeutics, Inc..
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2025 | MCRB | 0 | $0 | 13,163 | $15,534 | 35,821 | $0 |
| 2024 | MCRB | 0 | $0 | 27,755 | $24,266 | 82,524 | $0 |
| 2023 | MCRB | 0 | $0 | 8,552 | $11,545 | 27,838 | $0 |
| 2020 | MCRB | 0 | $0 | 0 | $0 | 20,000 | $0 |
| 2019 | MCRB | 0 | $0 | 4,378 | $25,186 | 12,000 | $0 |
| 2018 | MCRB | 0 | $0 | 2,780 | $30,635 | 8,000 | $0 |
| 2016 | MCRB | 0 | $0 | 29,238 | $794,389 | 29,238 | $227,760 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-18 | MCRB | Sale | 217 | 16.65 | 3,613 |
| 2025-08-15 | MCRB | Option Ex | 724 | .00 | 0 |
| 2025-05-16 | MCRB | Sale | 220 | 7.28 | 1,601 |
| 2025-05-15 | MCRB | Option Ex | 721 | .00 | 0 |
| 2025-02-18 | MCRB | Sale | 12,726 | .81 | 10,320 |
| 2025-02-15 | MCRB | Option Ex | 34,376 | .00 | 0 |
| 2024-11-15 | MCRB | Option Ex | 7,812 | .00 | 0 |
| 2024-11-18 | MCRB | Sale | 2,505 | .54 | 1,355 |
| 2024-10-28 | MCRB | Sale | 8,748 | .69 | 6,036 |
| 2024-10-27 | MCRB | Option Ex | 27,837 | .00 | 0 |
| 2024-08-16 | MCRB | Sale | 2,518 | .84 | 2,115 |
| 2024-08-15 | MCRB | Option Ex | 7,813 | .00 | 0 |
| 2024-05-15 | MCRB | Sale | 2,435 | .94 | 2,288 |
| 2024-05-15 | MCRB | Option Ex | 7,812 | .00 | 0 |
| 2024-02-15 | MCRB | Option Ex | 31,250 | .00 | 0 |
| 2024-02-16 | MCRB | Sale | 11,549 | 1.08 | 12,472 |
| 2023-10-27 | MCRB | Option Ex | 27,838 | .00 | 0 |
| 2023-10-30 | MCRB | Sale | 8,552 | 1.35 | 11,545 |
| 2020-01-26 | MCRB | Option Ex | 20,000 | .00 | 0 |
| 2019-01-26 | MCRB | Option Ex | 12,000 | .00 | 0 |
| 2019-01-28 | MCRB | Sale | 4,378 | 5.75 | 25,186 |
| 2018-01-26 | MCRB | Option Ex | 8,000 | .00 | 0 |
| 2018-01-26 | MCRB | Sale | 2,780 | 11.02 | 30,635 |
| 2016-06-30 | MCRB | Sale | 4,533 | 29.54 | 133,904 |
| 2016-06-30 | MCRB | Option Ex | 4,533 | 7.79 | 35,312 |
| 2016-06-28 | MCRB | Sale | 1,667 | 28.85 | 48,092 |
| 2016-06-27 | MCRB | Sale | 3,334 | 28.00 | 93,352 |
| 2016-06-28 | MCRB | Option Ex | 1,667 | 7.79 | 12,985 |
| 2016-06-27 | MCRB | Option Ex | 3,334 | 7.79 | 25,971 |
| 2016-04-04 | MCRB | Option Ex | 6,568 | 7.79 | 51,164 |
| 2016-04-04 | MCRB | Sale | 6,568 | 28.85 | 189,486 |
| 2016-03-31 | MCRB | Option Ex | 7,663 | 7.79 | 59,694 |
| 2016-03-31 | MCRB | Sale | 7,663 | 25.82 | 197,820 |
| 2016-03-28 | MCRB | Sale | 5,473 | 24.07 | 131,735 |
| 2016-03-28 | MCRB | Option Ex | 5,473 | 7.79 | 42,634 |
Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Shaff Eric D. (Officer of Seres Therapeutics, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.