Hack Andrew A. F.
SEC insider (Form 3/4/5 filer). CIK 0001657434. Director at Mersana Therapeutics, Inc. (MRSN) and 1 other issuer. 15 reported Form 4/5 transactions since Sep 2024; latest on Jan 6, 2026. Located in BOSTON, MA.
Companies Hack Andrew A. F. has filed insider reports for
- Mersana Therapeutics, Inc. (MRSN): Director
- Nuvalent, Inc. (NUVL): Director
Hack Andrew A. F.
CIK: 0001657434
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 (15 total)
- Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
Tender OfferDirect578 shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
Tender OfferIndirect346.5K shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
400 shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
1K shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
118 shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
1K shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
439 shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
1.8K shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
734 shares- - Jan 6, 2026MRSN
Mersana Therapeutics, Inc.
DispositionDirectStock Option (right to buy)
2.2K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jan 6, 2026 |  MRSN Mersana Therapeutics, Inc. | Tender Offer | 578 | - | $0 | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Tender Offer | 346,545 | - | $0 | Indirect |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 400 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 1,000 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 118 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 1,002 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 439 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 1,800 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 734 | - | - | Direct |
| Jan 6, 2026 | MRSN Mersana Therapeutics, Inc. | Disposition Stock Option (right to buy) | 2,200 | - | - | Direct |
1-10 of 15 transactions