David M. Mott - Jun 12, 2025 Form 4 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
Director
Signature
/s/ Alejandra Carvajal, Attorney-in-Fact
Stock symbol
MRSN
Transactions as of
Jun 12, 2025
Transactions value $
$0
Form type
4
Date filed
6/13/2025, 04:55 PM
Previous filing
Jun 11, 2025
Next filing
Jun 18, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MOTT DAVID M Director C/O MERSANA THERAPEUTICS, INC., 840 MEMORIAL DRIVE, CAMBRIDGE /s/ Alejandra Carvajal, Attorney-in-Fact 2025-06-13 0001219871

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MRSN Stock Option (right to buy) Award $0 +61.5K $0.00 61.5K Jun 12, 2025 Common Stock 61.5K $0.36 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The award will vest in full on the earlier of the first anniversary of the date of grant or the date of the 2026 Annual Meeting of Stockholders of the Issuer, subject to the Reporting Person's continuous service with the Issuer on such vesting date.