Huber Martin H. Jr. — SEC Form 4 filings
SEC reporting owner CIK 1653276. 10 Form 4 filings on record with FilingPulse; latest filed 2026-05-22.
Transaction summary — filings shown
Covers all 10 filings on record, filed 2024-01-17 to 2026-05-22. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 1 leg across 1 filing — 5,000 shares, $44,950 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 3 legs across 3 filings — 56,949 shares, $106,070 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 33.
- Largest priced transaction: sale of 50,423 shares @ $1.76 ($88,744) in Mersana Therapeutics, Inc., filed 2024-09-13.
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 |
|---|---|---|---|---|---|
| Mersana Therapeutics, Inc. (MRSN) | President, CEO, Director | 5 | — | 3 legs · 56,949 sh · $106,070 | 29 |
| Syndax Pharmaceuticals Inc (SNDX) | Director | 4 | 1 leg · 5,000 sh · $44,950 | — | 3 |
| ACTUATE THERAPEUTICS, INC. (ACTU) | Director | 1 | — | — | 1 |
Form 4 filings — Huber Martin H. Jr.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-22 | 4 | ACTUATE THERAPEUTICS, INC. (ACTU) | Grant/award (A): 15,000 (derivative) @ $0 | EDGAR |
| 2026-02-06 | 4 | Syndax Pharmaceuticals Inc (SNDX) | Grant/award (A): 24,000 @ $0 | EDGAR |
| 2026-01-06 | 4 | Mersana Therapeutics, Inc. (MRSN) | Code (U): 9,573 · Disposition to issuer (D): 5,938 (derivative) · Disposition to issuer (D): 26,713 (derivative) · Disposition to issuer (D): 1,923 (derivative) · Disposition to issuer (D): 99 (derivative) · Disposition to issuer (D): 1,002 (derivative) · +13 more | EDGAR |
| 2025-09-15 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 6,670 @ $0 · Sale (S): 2,012 @ $7.31 · Option exercise (M): 6,670 (derivative) @ $0 | EDGAR |
| 2025-05-19 | 4 | Syndax Pharmaceuticals Inc (SNDX) | Purchase (P): 5,000 @ $8.99 | EDGAR |
| 2025-02-07 | 4 | Syndax Pharmaceuticals Inc (SNDX) | Grant/award (A): 25,000 @ $0 | EDGAR |
| 2025-01-17 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 11,062 @ $0 · Sale (S): 4,514 @ $0.58 · Option exercise (M): 11,062 (derivative) @ $0 · Grant/award (A): 816,300 (derivative) @ $0 · Grant/award (A): 181,400 (derivative) @ $0 | EDGAR |
| 2024-09-13 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 166,750 @ $0 · Sale (S): 50,423 @ $1.76 · Option exercise (M): 166,750 (derivative) @ $0 | EDGAR |
| 2024-02-09 | 4 | Syndax Pharmaceuticals Inc (SNDX) | Grant/award (A): 17,000 @ $0 | EDGAR |
| 2024-01-17 | 4 | Mersana Therapeutics, Inc. (MRSN) | Grant/award (A): 199,125 (derivative) @ $0 · Grant/award (A): 44,250 (derivative) @ $0 | 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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