Ausiello Dennis A
SEC insider (Form 3/4/5 filer). CIK 0001381994. Director at Seres Therapeutics, Inc. (MCRB) and 2 other issuers. 29 reported Form 4/5 transactions since Sep 2024; latest on Jul 8, 2026. Located in CAMBRIDGE, MA.
Companies Ausiello Dennis A has filed insider reports for
- Seres Therapeutics, Inc. (MCRB): Director
- Rani Therapeutics Holdings, Inc. (RANI): Director
- ALNYLAM PHARMACEUTICALS, INC. (ALNY): Director
Ausiello Dennis A
CIK: 0001381994
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (29 total)
- Jul 8, 2026MCRB
Seres Therapeutics, Inc.
AwardDirectStock Option (right to buy)
6.5K shares- - Jul 1, 2026MCRB
Seres Therapeutics, Inc.
AwardDirectStock Option (right to buy)
7.5K shares- - May 28, 2026RANI
Rani Therapeutics Holdings, Inc.
AwardDirectDirector Stock Option (Right to Buy)
123.6K shares- - May 20, 2026ALNY
ALNYLAM PHARMACEUTICALS, INC.
AwardDirect671 shares- - Aug 14, 2025ALNY
ALNYLAM PHARMACEUTICALS, INC.
ExerciseDirect3.5K shares at avg. $189.87$656K - Aug 14, 2025ALNY
ALNYLAM PHARMACEUTICALS, INC.
SaleDirect2K shares at avg. $430.81$855K - Aug 14, 2025ALNY
ALNYLAM PHARMACEUTICALS, INC.
ExerciseDirect4.6K shares at avg. $148.77$682K - Aug 14, 2025ALNY
ALNYLAM PHARMACEUTICALS, INC.
SaleDirect7.7K shares at avg. $435.40$3.3M - Aug 14, 2025ALNY
ALNYLAM PHARMACEUTICALS, INC.
ExerciseDirect4K shares at avg. $171.95$693K - Aug 14, 2025ALNY
ALNYLAM PHARMACEUTICALS, INC.
SaleDirect2.1K shares at avg. $434.50$912K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jul 8, 2026 |  MCRB Seres Therapeutics, Inc. | Award Stock Option (right to buy) | 6,500 | - | - | Direct |
| Jul 1, 2026 | MCRB Seres Therapeutics, Inc. | Award Stock Option (right to buy) | 7,508 | - | - | Direct |
| May 28, 2026 |  RANI Rani Therapeutics Holdings, Inc. | Award Director Stock Option (Right to Buy) | 123,600 | - | - | Direct |
| May 20, 2026 |  ALNY ALNYLAM PHARMACEUTICALS, INC. | Award | 671 | - | $0 | Direct |
| Aug 14, 2025 | ALNY ALNYLAM PHARMACEUTICALS, INC. | Exercise | 3,454 | $189.87 | $655,811 | Direct |
| Aug 14, 2025 | ALNY ALNYLAM PHARMACEUTICALS, INC. | Sale | 1,985 | $430.81 | $855,158 | Direct |
| Aug 14, 2025 | ALNY ALNYLAM PHARMACEUTICALS, INC. | Exercise | 4,581 | $148.77 | $681,515 | Direct |
| Aug 14, 2025 | ALNY ALNYLAM PHARMACEUTICALS, INC. | Sale | 7,675 | $435.40 | $3,341,695 | Direct |
| Aug 14, 2025 | ALNY ALNYLAM PHARMACEUTICALS, INC. | Exercise | 4,032 | $171.95 | $693,302 | Direct |
| Aug 14, 2025 | ALNY ALNYLAM PHARMACEUTICALS, INC. | Sale | 2,098 | $434.50 | $911,581 | Direct |
1-10 of 29 transactions