Insider · CIK 0001435744
Thomas DesRosier
Files at: MCRB, ARIA, CBST. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 17, 2026 SForm 4 → | Aug 18, 5:22 pm EDT | Seres Therapeutics, Inc.MCRB | 82 | $4.55 | $373 | 8,117 | −1.00% | 10b5-1 |
| Aug 15, 2026 MForm 4 → | Aug 18, 5:22 pm EDT | Seres Therapeutics, Inc.MCRB | 245 | — | — | 8,199 | — | 10b5-1 |
| Jan 28, 2019 SForm 4 → | Jan 29, 6:55 pm EST | Seres Therapeutics, Inc.MCRB | 5,471 | $5.75 | $31,478 | 16,054 | −25.4% | plan? |
| Jan 26, 2019 MForm 4 → | Jan 29, 6:55 pm EST | Seres Therapeutics, Inc.MCRB | 15,000 | — | — | 21,525 | — | plan? |
| Jan 26, 2018 SForm 4 → | Jan 30, 8:58 pm EST | Seres Therapeutics, Inc.MCRB | 3,475 | $11.02 | $38,295 | 6,525 | −34.8% | plan? |
| Jan 26, 2018 MForm 4 → | Jan 30, 8:58 pm EST | Seres Therapeutics, Inc.MCRB | 10,000 | — | — | 10,000 | — | plan? |
| Feb 18, 2016 FMForm 4 → | Mar 30, 5:04 pm EDT | ARIAD PHARMACEUTICALS INCARIA | 73,370 | $5.03 | $92,401 | 36,630 | — | plan? late |
| Jan 21, 2015 JForm 4 → | Jan 21, 5:07 pm EST | CUBIST PHARMACEUTICALS INCCBST | 8,446 | $102.00 | $861,492 | 0 | — | plan? |
| Dec 31, 2014 JForm 4 → | Jan 5, 2015, 4:03 pm EST | CUBIST PHARMACEUTICALS INCCBST | 148 | $59.96 | $8,874 | 7,967 | — | plan? |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 15, 2026 MForm 4 → | Aug 18, 5:22 pm EDT | Seres Therapeutics, Inc.MCRB | 245 | — | — | 667 | — | 10b5-1 |
| Jul 8, 2026 AForm 4 → | Jul 10, 4:15 pm EDT | Seres Therapeutics, Inc.MCRB | 7,500 | — | — | 7,500 | — | |
| Jan 25, 2019 AMForm 4 → | Jan 29, 6:55 pm EST | Seres Therapeutics, Inc.MCRB | 99,800 | — | — | 25,000 | — | |
| Jan 26, 2018 AMForm 4 → | Jan 30, 8:58 pm EST | Seres Therapeutics, Inc.MCRB | 190,000 | — | — | 100,000 | — | |
| Jan 26, 2017 AForm 4 → | Jan 27, 5:57 pm EST | Seres Therapeutics, Inc.MCRB | 110,000 | — | — | 50,000 | — | |
| Jun 1, 2016 AForm 4 → | Jun 2, 9:41 pm EDT | Seres Therapeutics, Inc.MCRB | 100,000 | — | — | 100,000 | — | |
| Mar 7, 2016 AForm 4 → | Mar 9, 5:14 pm EST | ARIAD PHARMACEUTICALS INCARIA | 133,300 | — | — | 30,800 | — | |
| Feb 18, 2016 MForm 4 → | Mar 30, 5:04 pm EDT | ARIAD PHARMACEUTICALS INCARIA | 55,000 | — | — | 55,000 | — | late |
| Feb 18, 2015 AForm 4 → | Feb 20, 4:25 pm EST | ARIAD PHARMACEUTICALS INCARIA | 240,000 | — | — | 130,000 | — | |
| Jan 21, 2015 DForm 4 → | Jan 21, 5:07 pm EST | CUBIST PHARMACEUTICALS INCCBST | 102,053 | — | — | 0 | — |