The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Desrosier Thomas since 2016.
This trader's CIK number is 1435744.
At the time of last reporting, Desrosier Thomas was the See Remarks 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 |
| 2016 | ARIA | 0 | $0 | 0 | $0 | 55,000 | $0 |
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2025 | MCRB | 0 | $0 | 4,455 | $5,327 | 12,052 | $0 |
| 2024 | MCRB | 0 | $0 | 10,792 | $9,191 | 32,093 | $0 |
| 2023 | MCRB | 0 | $0 | 4,156 | $5,610 | 13,501 | $0 |
| 2020 | MCRB | 0 | $0 | 0 | $0 | 25,000 | $0 |
| 2019 | MCRB | 0 | $0 | 5,471 | $31,480 | 15,000 | $0 |
| 2018 | MCRB | 0 | $0 | 3,475 | $38,294 | 10,000 | $0 |
1. Ariad Pharmaceuticals Inc (ARIA)
2. Seres Therapeutics, Inc. (MCRB)
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2016-02-18 | ARIA | Option Ex | 55,000 | .00 | 0 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-18 | MCRB | Sale | 76 | 16.65 | 1,265 |
| 2025-08-15 | MCRB | Option Ex | 244 | .00 | 0 |
| 2025-05-15 | MCRB | Option Ex | 244 | .00 | 0 |
| 2025-05-15 | MCRB | Sale | 79 | 7.28 | 575 |
| 2025-02-18 | MCRB | Sale | 4,300 | .81 | 3,487 |
| 2025-02-15 | MCRB | Option Ex | 11,564 | .00 | 0 |
| 2024-11-18 | MCRB | Sale | 878 | .54 | 474 |
| 2024-11-15 | MCRB | Option Ex | 2,656 | .00 | 0 |
| 2024-10-27 | MCRB | Option Ex | 13,500 | .00 | 0 |
| 2024-10-28 | MCRB | Sale | 4,259 | .69 | 2,938 |
| 2024-08-16 | MCRB | Sale | 873 | .84 | 733 |
| 2024-08-15 | MCRB | Option Ex | 2,656 | .00 | 0 |
| 2024-05-15 | MCRB | Sale | 843 | .94 | 792 |
| 2024-05-15 | MCRB | Option Ex | 2,656 | .00 | 0 |
| 2024-02-15 | MCRB | Option Ex | 10,625 | .00 | 0 |
| 2024-02-16 | MCRB | Sale | 3,939 | 1.08 | 4,254 |
| 2023-10-27 | MCRB | Option Ex | 13,501 | .00 | 0 |
| 2023-10-30 | MCRB | Sale | 4,156 | 1.35 | 5,610 |
| 2020-01-26 | MCRB | Option Ex | 25,000 | .00 | 0 |
| 2019-01-26 | MCRB | Option Ex | 15,000 | .00 | 0 |
| 2019-01-28 | MCRB | Sale | 5,471 | 5.75 | 31,480 |
| 2018-01-26 | MCRB | Option Ex | 10,000 | .00 | 0 |
| 2018-01-26 | MCRB | Sale | 3,475 | 11.02 | 38,294 |
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 Desrosier Thomas (See Remarks of Seres Therapeutics, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.