Seres Therapeutics, Inc. (MCRB)
Data as of , from SEC Form 4 filings.
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Kelly Brady - OfficerOpen-market sale$291- Eric D. Shaff
About Seres Therapeutics, Inc. (MCRB)
Seres Therapeutics Inc is a clinical-stage biotechnology company focused on the development of live biotherapeutic candidates. Its pipeline includes candidates such as SER-155 and SER-603, aimed at preventing and treating bacterial infections, antimicrobial resistance, and gastrointestinal immune diseases. The company operates as a single reportable segment, mainly developing microbiome-based therapies targeting bacterial infections, antimicrobial resistance, and gastrointestinal immune diseases.
- CAMBRIDGE, MA
- 66
- 2015
- Nasdaq
https://www.serestherapeutics.comSEC filings for MCRB on EDGAR
MCRB Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 4 | 490 | $2K |
| Option exercise | 12 | 2,772 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
MCRB insider transactions (Form 4)
8856 Form 4 filings on record, the earliest from Oct 29, 2024, newest first. Filing history page 2 of 2.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
 Thomas Desrosier - Officer | Option exercise | Common Stock | 244 | - footnote F1 | - | |
| Thomas Desrosier - Officer | Open-market sale | Common Stock | 78 | $8.47 | $661 | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 133 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 111 | $0.00 | - | |
| ||||||
| Matthew R. Henn - Officer | Option exercise | Common Stock | 239 | - footnote F1 | - | |
| Matthew R. Henn - Officer | Open-market sale | Common Stock | 89 | $8.47 | $754 | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 141 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 98 | $0.00 | - | |
| ||||||
| Teresa L. Young - Officer | Option exercise | Common Stock | 98 | - footnote F1 | - | |
| Teresa L. Young - Officer | Open-market sale | Common Stock | 1,042 | $17.30 | $18K | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 3,998 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 132 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 98 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Common Stock | 3,998 | - footnote F1 | - | |
| Teresa L. Young - Officer | Option exercise | Common Stock | 132 | - footnote F1 | - | |
| ||||||
| Eric D. Shaff | Option exercise | Common Stock | 331 | - footnote F1 | - | |
| Eric D. Shaff | Open-market sale | Common Stock | 217 | $17.30 | $4K | |
| Eric D. Shaff | Option exercise | Restricted Stock Units | 390 | $0.00 | - | |
| Eric D. Shaff | Option exercise | Restricted Stock Units | 331 | $0.00 | - | |
| Eric D. Shaff | Option exercise | Common Stock | 390 | - footnote F1 | - | |
| ||||||
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 3,998 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 140 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 98 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 3,998 | - footnote F1 | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 140 | - footnote F1 | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 98 | - footnote F1 | - | |
| Matthew R. Henn - Officer | Open-market sale | Common Stock | 1,257 | $17.30 | $22K | |
| ||||||
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 132 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 112 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Common Stock | 132 | - footnote F1 | - | |
| Thomas Desrosier - Officer | Option exercise | Common Stock | 112 | - footnote F1 | - | |
| Thomas Desrosier - Officer | Open-market sale | Common Stock | 76 | $17.30 | $1K | |
| ||||||
| Matthew R. Henn - Officer | Grant or award | Restricted Stock Units | 3,998 | $0.00 | - | |
| Teresa L. Young - Officer | Grant or award | Restricted Stock Units | 3,998 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Common Stock | 133 | - | - | |
| Teresa L. Young - Officer | Option exercise | Common Stock | 97 | - | - | |
| Teresa L. Young - Officer | Open-market sale | Common Stock | 59 | $16.65 | $982 | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 133 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 97 | $0.00 | - | |
| Eric D. Shaff | Option exercise | Common Stock | 391 | - | - | |
| Eric D. Shaff | Option exercise | Common Stock | 333 | - | - | |
| Eric D. Shaff | Open-market sale | Common Stock | 217 | $16.65 | $4K | |
| Eric D. Shaff | Option exercise | Restricted Stock Units | 391 | $0.00 | - | |
| Eric D. Shaff | Option exercise | Restricted Stock Units | 333 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 141 | - | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 97 | - | - | |
| Matthew R. Henn - Officer | Open-market sale | Common Stock | 73 | $16.65 | $1K | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 141 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 97 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Common Stock | 133 | - | - | |
| Thomas Desrosier - Officer | Option exercise | Common Stock | 111 | - | - | |
| Thomas Desrosier - Officer | Open-market sale | Common Stock | 76 | $16.65 | $1K | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 133 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 111 | $0.00 | - | |
| Robert L. Rosiello | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Stephen Berenson | Grant or award | Stock Option (right to buy) | 11,470 | $0.00 | - | |
| Claire Fraser | Grant or award | Stock Option (right to buy) | 6,452 | $0.00 | - | |
 Dennis A. Ausiello | Grant or award | Stock Option (right to buy) | 6,452 | $0.00 | - | |
| Moltke Lisa von - Officer | Option exercise | Common Stock | 2,969 | - | - | |
| Moltke Lisa von - Officer | Open-market sale | Common Stock | 977 | $10.81 | $528 | |
| Moltke Lisa von - Officer | Option exercise | Restricted Stock Units | 2,969 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Common Stock | 2,656 | - | - | |
| Teresa L. Young - Officer | Open-market sale | Common Stock | 735 | $10.82 | $398 | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 2,656 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 2,812 | - | - | |
| Matthew R. Henn - Officer | Open-market sale | Common Stock | 927 | $10.81 | $501 | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 2,812 | $0.00 | - | |
| Eric D. Shaff - Officer | Option exercise | Common Stock | 7,812 | - | - | |
| Eric D. Shaff - Officer | Open-market sale | Common Stock | 2,505 | $10.82 | $1K | |
| Eric D. Shaff - Officer | Option exercise | Restricted Stock Units | 7,812 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Common Stock | 2,656 | - | - | |
| Thomas Desrosier - Officer | Open-market sale | Common Stock | 878 | $10.81 | $475 | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 2,656 | $0.00 | - | |
| Moltke Lisa von - Officer | Option exercise | Common Stock | 13,744 | $0.00 | - | |
| Moltke Lisa von - Officer | Open-market sale | Common Stock | 4,334 | $13.80 | $3K | |
| Moltke Lisa von - Officer | Option exercise | Restricted Stock Units | 13,744 | $0.00 | - | |
| Matthew R. Henn - Officer | Option exercise | Common Stock | 12,622 | $0.00 | - | |
| Matthew R. Henn - Officer | Open-market sale | Common Stock | 3,984 | $13.80 | $3K | |
| Matthew R. Henn - Officer | Option exercise | Restricted Stock Units | 12,622 | $0.00 | - | |
| Eric D. Shaff - Officer | Option exercise | Common Stock | 27,837 | $0.00 | - | |
| Eric D. Shaff - Officer | Open-market sale | Common Stock | 8,748 | $13.80 | $6K | |
| Eric D. Shaff - Officer | Option exercise | Restricted Stock Units | 27,837 | $0.00 | - | |
| Teresa L. Young - Officer | Option exercise | Common Stock | 11,360 | $0.00 | - | |
| Teresa L. Young - Officer | Open-market sale | Common Stock | 2,983 | $13.80 | $2K | |
| Teresa L. Young - Officer | Option exercise | Restricted Stock Units | 11,360 | $0.00 | - | |
| Thomas Desrosier - Officer | Option exercise | Common Stock | 13,500 | $0.00 | - | |
| Thomas Desrosier - Officer | Open-market sale | Common Stock | 4,259 | $13.80 | $3K | |
| Thomas Desrosier - Officer | Option exercise | Restricted Stock Units | 13,500 | $0.00 | - | |
Item 2.02, 9.01
Item 1.01, 1.02, 9.01
Item 5.02, 5.07, 9.01
Item 7.01, 8.01, 9.01
Recent MCRB Form 144 notices of proposed sale
1An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| - | - | - | - | View on EDGAR |
MCRB insider trading FAQ
What is the latest insider trade for MCRB?
Seres Therapeutics, Inc. (MCRB) had 4 insider filings in the last 90 days, with the most recent on 18 August 2026. The full record for MCRB runs to 56 Form 4 filings, the earliest from 29 October 2024. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying MCRB stock?
No insider purchases of MCRB were filed in the last 90 days.
How many insiders are selling MCRB stock?
4 insider sales of MCRB were filed in the last 90 days, totaling $2K.
Where can I see MCRB SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects MCRB Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Kelly Brady view on EDGAR
- - Eric D. Shaff view on EDGAR
- - Matthew R. Henn view on EDGAR
- - Thomas Desrosier view on EDGAR
- - Kurt Graves view on EDGAR
- - Richard N. Kender view on EDGAR
- - Matthew R. Henn view on EDGAR
- - Marella Thorell view on EDGAR
- - Claire Fraser view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where MCRB's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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