Hack Andrew A. F. — SEC Form 4 filings
SEC reporting owner CIK 1657434. 6 Form 4 filings on record with FilingPulse; latest filed 2026-01-06.
Transaction summary — filings shown
Covers all 6 filings on record, filed 2024-03-29 to 2026-01-06. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 3 legs across 2 filings — 2,130,000 shares, $174,035,959 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 17.
- Largest priced transaction: sale of 1,250,000 shares @ $88.00 ($110,000,000) in Nuvalent, Inc., filed 2024-12-13.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Nuvalent, Inc. (NUVL) | Director | 3 | — | 3 legs · 2,130,000 sh · $174,035,959 | 2 |
| Mersana Therapeutics, Inc. (MRSN) | Director | 3 | — | — | 15 |
Form 4 filings — Hack Andrew A. F.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-01-06 | 4 | Mersana Therapeutics, Inc. (MRSN) | Code (U): 578 · Code (U): 346,545 · Disposition to issuer (D): 2,460 (derivative) · Disposition to issuer (D): 2,088 (derivative) · Disposition to issuer (D): 400 (derivative) · Disposition to issuer (D): 1,000 (derivative) · +7 more | EDGAR |
| 2025-06-13 | 4 | Mersana Therapeutics, Inc. (MRSN) | Grant/award (A): 61,500 (derivative) @ $0 | EDGAR |
| 2024-12-13 | 4 | Nuvalent, Inc. (NUVL) | Sale (S): 1,250,000 @ $88 | EDGAR |
| 2024-06-14 | 4 | Nuvalent, Inc. (NUVL) | Grant/award (A): 2,499 · Grant/award (A): 3,789 (derivative) @ $0 | EDGAR |
| 2024-06-12 | 4 | Mersana Therapeutics, Inc. (MRSN) | Grant/award (A): 55,000 (derivative) @ $0 | EDGAR |
| 2024-03-29 | 4 | Nuvalent, Inc. (NUVL) | Sale (S): 88,205 @ $76.88 · Sale (S): 791,795 @ $72.31 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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