Mersana Therapeutics, Inc. — Director's Dealing 2023

Apr 5, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Mersana Therapeutics, Inc. (MRSN)
CIK: 0001442836
Period of Report: 2023-04-03

Reporting Person: Huber Martin H. Jr. (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-04-03	Stock Option (right to buy)	$4.25	A	3375	Acquired	2033-04-02	Common Stock (3375)	Direct

Footnotes

F1: This stock option was granted in connection with the Reporting Person's election to receive the Reporting Person's quarterly retainer for director services in the form of stock options rather than cash. The options were granted to the Reporting Person pursuant to the Issuer's Amended & Restated Non-Employee Director Compensation Policy in lieu of retainer fees of $11,000 for the quarter ended March 31, 2023.

F2: Fully vested as of the date of grant