Mersana Therapeutics, Inc. — Director's Dealing 2021

Dec 20, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Mersana Therapeutics, Inc. (MRSN)
CIK: 0001442836
Period of Report: 2021-12-20

Reporting Person: Lowinger Timothy B (Chief Science & Tech. Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-20	Common Stock	M	45593	$1.40	Acquired	120766	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-20	Stock Option (right to buy)	$1.40	M	45593	Disposed	2022-10-02	Common Stock (45593)	Direct

Footnotes

F1: The option vested 25% on October 2, 2013, and in equal quarterly installments thereafter.