4//SEC Filing
Huber Martin H. Jr. 4
Accession 0001104659-25-090026
CIK 0001442836other
Filed
Sep 14, 8:00 PM ET
Accepted
Sep 15, 4:26 PM ET
Size
10.4 KB
Accession
0001104659-25-090026
Insider Transaction Report
Form 4
Huber Martin H. Jr.
DirectorPresident, CEO
Transactions
- Exercise/Conversion
Common Stock
2025-09-11+6,670→ 11,584 total - Sale
Common Stock
2025-09-12$7.31/sh−2,012$14,708→ 9,572 total - Exercise/Conversion
Restricted Stock Unit
2025-09-11−6,670→ 13,340 total→ Common Stock (20,010 underlying)
Footnotes (6)
- [F1]Represents shares of common stock received upon vesting of a portion of the restricted stock units ("RSUs") awarded to the Reporting Person on September 11, 2023.
- [F2]Amounts reported in this Form 4 reflect the one-for-twenty-five reverse stock split effected by the Issuer on July 25, 2025.
- [F3]Represents the sale of shares of common stock to satisfy the Reporting Person's tax withholding obligations in connection with the service-based vesting and settlement of the RSUs pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 7, 2023. The sale was effected through an automatic "sell to cover" transaction that did not represent a discretionary trade by the Reporting Person.
- [F4]The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $7.22 to $7.31, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
- [F5]Each RSU represents the contingent right to receive one share of common stock of the Issuer.
- [F6]25% of the total number of RSUs granted vested on September 11, 2025, and the remainder shall vest thereafter in equal annual installments over the next two years.
Documents
Issuer
Mersana Therapeutics, Inc.
CIK 0001442836
Entity typeother
Related Parties
1- filerCIK 0001653276
Filing Metadata
- Form type
- 4
- Filed
- Sep 14, 8:00 PM ET
- Accepted
- Sep 15, 4:26 PM ET
- Size
- 10.4 KB