DeSchuytner Brian — SEC Form 4 filings
SEC reporting owner CIK 1782163. 6 Form 4 filings on record with FilingPulse; latest filed 2026-01-06.
Transaction summary — filings shown
Covers all 6 filings on record, filed 2024-01-17 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): 6 legs across 5 filings — 37,528 shares, $61,258 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 41.
- Largest priced transaction: sale of 9,327 shares @ $2.71 ($25,276) in Mersana Therapeutics, Inc., filed 2024-01-17.
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) | SVP, COO & CFO | 6 | — | 6 legs · 37,528 sh · $61,258 | 41 |
Form 4 filings — DeSchuytner Brian
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-01-06 | 4 | Mersana Therapeutics, Inc. (MRSN) | Code (U): 5,015 · Disposition to issuer (D): 3,515 (derivative) · Disposition to issuer (D): 7,734 (derivative) · Disposition to issuer (D): 4,009 (derivative) · Disposition to issuer (D): 5,590 (derivative) · Disposition to issuer (D): 178 (derivative) · +13 more | EDGAR |
| 2025-01-17 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 6,250 @ $0 · Option exercise (M): 14,583 @ $0 · Sale (S): 8,470 @ $0.58 · Option exercise (M): 6,250 (derivative) @ $0 · Option exercise (M): 14,583 (derivative) @ $0 · Grant/award (A): 281,250 (derivative) @ $0 · +1 more | EDGAR |
| 2025-01-16 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 6,250 @ $0 · Sale (S): 2,331 @ $0.63 · Option exercise (M): 6,250 (derivative) @ $0 | EDGAR |
| 2025-01-15 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 10,000 @ $0 · Sale (S): 3,713 @ $0.66 · Option exercise (M): 10,000 (derivative) @ $0 | EDGAR |
| 2024-10-07 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 50,000 @ $0 · Sale (S): 8,089 @ $2 · Sale (S): 5,598 @ $1.96 · Option exercise (M): 50,000 (derivative) @ $0 | EDGAR |
| 2024-01-17 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 10,000 @ $0 · Option exercise (M): 6,250 @ $0 · Option exercise (M): 6,250 @ $0 · Option exercise (M): 3,958 @ $0 · Sale (S): 9,327 @ $2.71 · Option exercise (M): 10,000 (derivative) @ $0 · +5 more | 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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