Lowinger Timothy B — SEC Form 4 filings
SEC reporting owner CIK 1709775. 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 — 37,421 shares, $63,455 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 44.
- Largest priced transaction: sale of 10,409 shares @ $2.71 ($28,208) 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, Chief Sci.&Tech. Officer | 6 | — | 6 legs · 37,421 sh · $63,455 | 44 |
Form 4 filings — Lowinger Timothy B
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-01-06 | 4 | Mersana Therapeutics, Inc. (MRSN) | Code (U): 10,466 · Disposition to issuer (D): 3,047 (derivative) · Disposition to issuer (D): 6,702 (derivative) · Disposition to issuer (D): 696 (derivative) · Disposition to issuer (D): 1,578 (derivative) · Disposition to issuer (D): 713 (derivative) · +16 more | EDGAR |
| 2025-01-17 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 7,291 @ $0 · Option exercise (M): 12,500 @ $0 · Sale (S): 8,048 @ $0.58 · Option exercise (M): 7,291 (derivative) @ $0 · Option exercise (M): 12,500 (derivative) @ $0 · Grant/award (A): 243,750 (derivative) @ $0 · +1 more | EDGAR |
| 2025-01-16 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 4,792 @ $0 · Sale (S): 1,794 @ $0.63 · Option exercise (M): 4,792 (derivative) @ $0 | EDGAR |
| 2025-01-15 | 4 | Mersana Therapeutics, Inc. (MRSN) | Option exercise (M): 9,375 @ $0 · Sale (S): 3,483 @ $0.66 · Option exercise (M): 9,375 (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): 9,375 @ $0 · Option exercise (M): 4,792 @ $0 · Option exercise (M): 7,292 @ $0 · Option exercise (M): 7,916 @ $0 · Sale (S): 10,409 @ $2.71 · Option exercise (M): 9,375 (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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