Seres Therapeutics (MCRB) stock: insider trades, news & valuation
Heavy sellingShare price and insider trades
Seres Therapeutics insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 5 sold $55K of MCRB stock on the open market.
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MCRB insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $2K | 4 |
| Q2 2026 | — | 0 | $4K | 4 |
| Q1 2026 | — | 0 | $4K | 4 |
| Q4 2025 | — | 0 | $45K | 4 |
Valuation, profit and volume
Summary
Over the past 12 months, 0 Seres Therapeutics, Inc. insiders reported open-market purchases totaling $0, while 5 insiders reported sales totaling $55K. 15 of 16 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 18SEC | Eric D. ShaffDirector | Sell Plan | 26312,499 held (−2%) | $4.55 | $1K | -40.4% | — |
| Aug 18SEC | Thomas DesrosierSee Remarks | Sell Plan | 828,117 held (−1%) | $4.55 | $373 | -40.4% | — |
| Aug 18SEC | Matthew R HennSee Remarks | Sell Plan | 817,995 held (−1%) | $4.55 | $369 | -40.4% | — |
| Aug 18SEC | Kelly BradySee Remarks | Sell Plan | 648,679 held (−1%) | $4.55 | $291 | -40.4% | — |
| May 19SEC | Eric D. ShaffDirector | Sell Plan | 25912,040 held (−2%) | $7.53 | $2K | -64.0% | — |
| May 19SEC | Thomas DesrosierSee Remarks | Sell Plan | 797,954 held (−1%) | $7.53 | $595 | -64.0% | — |
| May 19SEC | Matthew R HennSee Remarks | Sell Plan | 777,838 held (−1%) | $7.53 | $580 | -64.0% | — |
| May 19SEC | Kelly BradySee Remarks | Sell | 598,562 held (−1%) | $7.53 | $444 | -64.0% | — |
| Feb 18SEC | Eric D. ShaffDirector | Sell Plan | 25911,577 held (−2%) | $8.47 | $2K | -68.0% | — |
| Feb 18SEC | Matthew R HennSee Remarks | Sell Plan | 897,677 held (−1%) | $8.47 | $754 | -68.0% | — |
| Feb 18SEC | Thomas DesrosierSee Remarks | Sell Plan | 787,789 held (−1%) | $8.47 | $661 | -68.0% | — |
| Feb 18SEC | Teresa L. YoungSee Remarks | Sell Plan | 758,557 held (−1%) | $8.47 | $635 | -68.0% | — |
| Nov 18SEC | Matthew R HennSee Remarks | Sell Plan | 1,2577,527 held (−14%) | $17.30 | $22K | -84.3% | — |
| Nov 18SEC | Teresa L. YoungSee Remarks | Sell Plan | 1,0428,401 held (−11%) | $17.30 | $18K | -84.3% | — |
| Nov 18SEC | Eric D. ShaffDirector | Sell Plan | 21711,113 held (−2%) | $17.30 | $4K | -84.3% | — |
| Nov 18SEC | Thomas DesrosierSee Remarks | Sell Plan | 767,623 held (−1%) | $17.30 | $1K | -84.3% | — |
Insiders at Seres Therapeutics, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Matthew R HennSee Remarks | — | $23K | Aug 18, 2026 | — |
| Teresa L. YoungSee Remarks | — | $19K | Feb 18, 2026 | — |
| Eric D. ShaffDirector | — | $9K | Aug 18, 2026 | — |
| Thomas DesrosierSee Remarks | — | $3K | Aug 18, 2026 | — |
| Kelly BradySee Remarks | — | $735 | Aug 18, 2026 | — |
MCRB stock: common questions
Are Seres Therapeutics, Inc. insiders buying MCRB stock?
In the past 12 months, 0 insiders reported open-market purchases of MCRB worth $0.
Are Seres Therapeutics, Inc. insiders selling MCRB stock?
5 insiders reported sales worth $55K over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is MCRB's 52-week range?
Over the past year MCRB has traded between $2.63 and $28.63. It last closed at $2.71 on Oct 9, 2026.