Thomas DesRosier insider trades: Seres Therapeutics (MCRB) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Thomas reports to the SEC
Open-market buys and sales
17 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| May 18, 2026 | MCRB | ↓ Sell | 79 | $7.53 | $595 | Direct | May 19, 2026 (1d) |
| Feb 15, 2026 | MCRB | ↓ Sell | 78 | $8.47 | $661 | Direct | Feb 18, 2026 (3d) |
| Nov 15, 2025 | MCRB | ↓ Sell | 76 | $17.30 | $1K | Direct | Nov 18, 2025 (3d) |
| Aug 18, 2025 | MCRB | ↓ Sell | 76 | $16.65 | $1K | Direct | Aug 19, 2025 (1d) |
| May 15, 2025 | MCRB | ↓ Sell | 79 | $7.28 | $575 | Direct | May 19, 2025 (4d) |
| Feb 18, 2025 | MCRB | ↓ Sell | 4,300 | $0.81 | $3K | Direct | Feb 19, 2025 (1d) |
| Nov 18, 2024 | MCRB | ↓ Sell | 878 | $0.54 | $475 | Direct | Nov 19, 2024 (1d) |
| Oct 28, 2024 | MCRB | ↓ Sell | 4,259 | $0.69 | $3K | Direct | Oct 29, 2024 (1d) |
| Aug 16, 2024 | MCRB | ↓ Sell | 873 | $0.84 | $733 | Direct | Aug 19, 2024 (3d) |
| May 15, 2024 | MCRB | ↓ Sell | 843 | $0.94 | $792 | Direct | May 17, 2024 (2d) |
| Feb 16, 2024 | MCRB | ↓ Sell | 3,939 | $1.08 | $4K | Direct | Feb 16, 2024 (0d) |
| Oct 30, 2023 | MCRB | ↓ Sell | 4,156 | $1.35 | $6K | Direct | Oct 31, 2023 (1d) |
| Jan 28, 2019 | MCRB | ↓ Sell | 5,471 | $5.75 | $31K | Direct | Jan 29, 2019 (1d) |
| Jan 26, 2018 | MCRB | ↓ Sell | 3,475 | $11.02 | $38K | Direct | Jan 30, 2018 (4d) |
| Apr 16, 2014 | CBST | ↓ Sell | 768 | $64.00 | $49K | Direct | Apr 16, 2014 (0d) |
| May 25, 2010 | GENZ | ↓ Sell | 1,972 | $45.60 | $90K | Direct | May 26, 2010 (1d) |
| Aug 7, 2008 | GENZ | ↓ Sell | 10,725 | $78.99 | $847K | Direct | Aug 8, 2008 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MCRB insiders
Open-market trades in the last 12 months
About Thomas DesRosier's insider trades
Thomas DesRosier is See Remarks at Seres Therapeutics (MCRB). Since Aug 7, 2008, Thomas has reported no open-market purchases and 17 sales worth $1.1M on SEC Form 4. In the last 12 months: 3 sales ($3K).
Their filings also include grants and awards (21 filings), option exercises (21 filings), other transactions (10 filings), shares withheld for taxes (2 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MCRB insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.