Matthew R. Henn
CIK: 0001767321
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Seres Therapeutics, Inc.
Discretionary Trading P&L
Holdings
Transaction History (27 total)
- Aug 17, 2026MCRB
Seres Therapeutics, Inc.
Sale(S)Direct81 shares at avg. $4.55$368.55 - Aug 15, 2026MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct238 shares- - Jul 8, 2026MCRB
Seres Therapeutics, Inc.
Award(A)DirectStock Option (right to buy)
25K shares- - May 18, 2026MCRB
Seres Therapeutics, Inc.
Sale(S)Direct77 shares at avg. $7.53$579.81 - May 15, 2026MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct238 shares- - Mar 4, 2026MCRB
Seres Therapeutics, Inc.
Award(A)DirectStock Option (right to buy)
75K shares- - Feb 15, 2026MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct239 shares- - Feb 15, 2026MCRB
Seres Therapeutics, Inc.
Sale(S)Direct89 shares at avg. $8.47$753.83 - Nov 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct4K shares- - Nov 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct140 shares- - Nov 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct98 shares- - Nov 15, 2025MCRB
Seres Therapeutics, Inc.
Sale(S)Direct1.3K shares at avg. $17.30$22K - Sep 26, 2025MCRB
Seres Therapeutics, Inc.
Award(A)DirectRestricted Stock Units
4K shares- - Aug 18, 2025MCRB
Seres Therapeutics, Inc.
Sale(S)Direct73 shares at avg. $16.65$1K - Aug 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct141 shares- - Aug 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct97 shares- - May 16, 2025MCRB
Seres Therapeutics, Inc.
Sale(S)Direct77 shares at avg. $7.28$560.56 - May 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct140 shares- - May 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct98 shares- - Feb 18, 2025MCRB
Seres Therapeutics, Inc.
Sale(S)Direct4K shares at avg. $0.81$3K - Feb 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct2.8K shares- - Feb 15, 2025MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct7.8K shares- - Feb 7, 2025MCRB
Seres Therapeutics, Inc.
Award(A)DirectStock Option (Right to Buy)
650K shares- - Nov 18, 2024MCRB
Seres Therapeutics, Inc.
Sale(S)Direct927 shares at avg. $0.54$501.229 - Nov 15, 2024MCRB
Seres Therapeutics, Inc.
Exercise(M)Direct2.8K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 17, 2026 | MCRB Seres Therapeutics, Inc. | Sale(S) | 81 | $4.55 | $369 | Direct |
| Aug 15, 2026 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 238 | - | $0 | Direct |
| Jul 8, 2026 | MCRB Seres Therapeutics, Inc. | Award(A) Stock Option (right to buy) | 25,000 | - | - | Direct |
| May 18, 2026 | MCRB Seres Therapeutics, Inc. | Sale(S) | 77 | $7.53 | $580 | Direct |
| May 15, 2026 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 238 | - | $0 | Direct |
| Mar 4, 2026 | MCRB Seres Therapeutics, Inc. | Award(A) Stock Option (right to buy) | 75,000 | - | - | Direct |
| Feb 15, 2026 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 239 | - | $0 | Direct |
| Feb 15, 2026 | MCRB Seres Therapeutics, Inc. | Sale(S) | 89 | $8.47 | $754 | Direct |
| Nov 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 3,998 | - | - | Direct |
| Nov 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 140 | - | - | Direct |
| Nov 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 98 | - | - | Direct |
| Nov 15, 2025 | MCRB Seres Therapeutics, Inc. | Sale(S) | 1,257 | $17.30 | $21,746 | Direct |
| Sep 26, 2025 | MCRB Seres Therapeutics, Inc. | Award(A) Restricted Stock Units | 3,998 | - | - | Direct |
| Aug 18, 2025 | MCRB Seres Therapeutics, Inc. | Sale(S) | 73 | $16.65 | $1,215 | Direct |
| Aug 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 141 | - | - | Direct |
| Aug 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 97 | - | - | Direct |
| May 16, 2025 | MCRB Seres Therapeutics, Inc. | Sale(S) | 77 | $7.28 | $561 | Direct |
| May 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 140 | - | - | Direct |
| May 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 98 | - | - | Direct |
| Feb 18, 2025 | MCRB Seres Therapeutics, Inc. | Sale(S) | 3,953 | $0.81 | $3,204 | Direct |
| Feb 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 2,813 | - | - | Direct |
| Feb 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 7,813 | - | - | Direct |
| Feb 7, 2025 | MCRB Seres Therapeutics, Inc. | Award(A) Stock Option (Right to Buy) | 650,000 | - | - | Direct |
| Nov 18, 2024 | MCRB Seres Therapeutics, Inc. | Sale(S) | 927 | $0.54 | $501 | Direct |
| Nov 15, 2024 | MCRB Seres Therapeutics, Inc. | Exercise(M) | 2,812 | - | $0 | Direct |
1-25 of 27 transactions
About Henn Matthew R
Henn Matthew R (SEC CIK 0001767321) files insider reports with the SEC as Officer of Seres Therapeutics, Inc. (MCRB).
Signal8 holds 13 ownership filings by Henn Matthew R, all Form 4s, filed between Oct 29, 2024 and Aug 18, 2026. Those filings report 27 transactions, from Oct 27, 2024 to Aug 17, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Henn Matthew R's filings is in CAMBRIDGE, MA.
Recent filings by Henn Matthew R
- Aug 17, 2026: Open-market sale of MCRB shares (Form 4, code S).
- Aug 15, 2026: Option exercise of MCRB shares (Form 4, code M).
- Jul 8, 2026: Grant or award of MCRB derivative securities (Form 4, code A).
- May 18, 2026: Open-market sale of MCRB shares (Form 4, code S).
- May 15, 2026: Option exercise of MCRB shares (Form 4, code M).