Mersana Therapeutics, Inc. — Director's Dealing 2017

Sep 7, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Mersana Therapeutics, Inc. (MRSN)
CIK: 0001442836
Period of Report: 2017-09-05

Reporting Person: Alleva Lawrence M (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-09-05	Stock Option (right to buy)	$17.50	A	20000	Acquired	2020-09-05	Common Stock (20000)	Direct

Footnotes

F1: The option becomes exercisable in equal quarterly installments over three years from the date of the grant.