DesRosier Thomas
SEC insider (Form 3/4/5 filer). CIK 0001435744. Officer at Seres Therapeutics, Inc. (MCRB). 25 reported Form 4/5 transactions since Sep 2024; latest on Aug 17, 2026. Located in CAMBRIDGE, MA.
Companies DesRosier Thomas has filed insider reports for
- Seres Therapeutics, Inc. (MCRB): Officer, See Remarks
DesRosier Thomas
CIK: 0001435744
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 (25 total)
- Aug 17, 2026MCRB
Seres Therapeutics, Inc.
SaleDirect82 shares at avg. $4.55$373.1 - Aug 15, 2026MCRB
Seres Therapeutics, Inc.
ExerciseDirect245 shares- - Jul 8, 2026MCRB
Seres Therapeutics, Inc.
AwardDirectStock Option (right to buy)
7.5K shares- - May 18, 2026MCRB
Seres Therapeutics, Inc.
SaleDirect79 shares at avg. $7.53$594.87 - May 15, 2026MCRB
Seres Therapeutics, Inc.
ExerciseDirect244 shares- - Mar 4, 2026MCRB
Seres Therapeutics, Inc.
AwardDirectStock Option (right to buy)
22.5K shares- - Feb 15, 2026MCRB
Seres Therapeutics, Inc.
ExerciseDirect244 shares- - Feb 15, 2026MCRB
Seres Therapeutics, Inc.
SaleDirect78 shares at avg. $8.47$660.66 - Nov 15, 2025MCRB
Seres Therapeutics, Inc.
ExerciseDirect132 shares- - Nov 15, 2025MCRB
Seres Therapeutics, Inc.
ExerciseDirect112 shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 17, 2026 | MCRB Seres Therapeutics, Inc. | Sale | 82 | $4.55 | $373 | Direct |
| Aug 15, 2026 | MCRB Seres Therapeutics, Inc. | Exercise | 245 | - | $0 | Direct |
| Jul 8, 2026 | MCRB Seres Therapeutics, Inc. | Award Stock Option (right to buy) | 7,500 | - | - | Direct |
| May 18, 2026 | MCRB Seres Therapeutics, Inc. | Sale | 79 | $7.53 | $595 | Direct |
| May 15, 2026 | MCRB Seres Therapeutics, Inc. | Exercise | 244 | - | $0 | Direct |
| Mar 4, 2026 | MCRB Seres Therapeutics, Inc. | Award Stock Option (right to buy) | 22,500 | - | - | Direct |
| Feb 15, 2026 | MCRB Seres Therapeutics, Inc. | Exercise | 244 | - | $0 | Direct |
| Feb 15, 2026 | MCRB Seres Therapeutics, Inc. | Sale | 78 | $8.47 | $661 | Direct |
| Nov 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise | 132 | - | - | Direct |
| Nov 15, 2025 | MCRB Seres Therapeutics, Inc. | Exercise | 112 | - | - | Direct |
1-10 of 25 transactions