Updated Jul 16, 2026
DesRosier Thomas has filed 2 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $7K.
Thomas Desrosier serves as the Chief Legal Officer and Executive Vice President at Seres Therapeutics, Inc., a company focused on developing microbiome therapeutics. He has been involved in multiple SEC filings related to his role but has not reported any stock transactions.
| Role | Insider |
|---|---|
| Notability | 20/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-19 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 79 | $7.53 | $595 |
| 2026-05-19 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 244 | — | |
| 2026-02-18 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 78 | $8.47 | $661 |
| 2026-02-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 244 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 76 | $17.30 | $1K |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 112 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 132 | — | |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 76 | $16.65 | $1K |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 111 | — | |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 133 | — | |
| 2024-11-19 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 878 | $0.54 | $475 |
| 2024-11-19 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 2.7K | — | |
| 2024-10-29 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 4.3K | $0.69 | $3K |
| 2024-10-29 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 13.5K | $0.00 |
Thomas Desrosier serves as the Chief Legal Officer and Executive Vice President at Seres Therapeutics, Inc., a company focused on developing microbiome therapeutics. He has been involved in multiple SEC filings related to his role but has not reported any stock transactions.…
2 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 6 open-market sales ($7K) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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