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Mersana Therapeutics, Inc. Director's Dealing 2017

Jun 28, 2017

34702_dirs_2017-06-27_950b686c-63d1-472f-97d8-1d521d69d288.zip

Director's Dealing

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SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Mersana Therapeutics, Inc. (MRSN)
CIK: 0001442836
Period of Report: 2017-06-27

Reporting Person: Lowinger Timothy B (Chief Scientific Officer)

Holdings (Derivative)

Security Exercise Price Expiration Underlying Shares Ownership
Option to purchase Common Stock $6.98 2018-03-03 Common Stock (5911) Direct
Option to purchase Common Stock $7.43 2021-05-11 Common Stock (5111) Direct
Option to purchase Common Stock $1.40 2022-10-01 Common Stock (103333) Direct
Option to purchase Common Stock $1.40 2024-01-09 Common Stock (11111) Direct
Option to purchase Common Stock $1.53 2025-06-11 Common Stock (128118) Direct
Option to purchase Common Stock $4.10 2026-08-29 Common Stock (45854) Direct

Footnotes

F1: The options vested 25% on February 11, 2009 and in equal quarterly installments thereafter.

F2: The options vested 25% on May 12, 2012 and in equal quarterly installments thereafter.

F3: The options vested 25% on August 1, 2013 and in equal quarterly installments thereafter.

F4: The options vest in equal quarterly installments over the first four years after the vesting commencement date, March 31, 2014.

F5: The options vest in equal quarterly installments over the first four years after the vesting commencement date, June 12, 2015.

F6: The options vest in equal quarterly installments over the first four years after the vesting commencement date, July 1, 2016.