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Mersana Therapeutics, Inc. Director's Dealing 2017

Dec 21, 2017

34702_dirs_2017-12-21_545084cf-50ed-4472-bb30-150cffad089d.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Mersana Therapeutics, Inc. (MRSN)
CIK: 0001442836
Period of Report: 2017-12-20

Reporting Person: Protopapas Anna (Director, President and CEO)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2017-12-20 Common Stock M 10417 $1.53 Acquired 130719 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2017-12-20 Option to Purchase Common Stock $1.53 M 10417 Disposed 2025-05-07 Common Stock (10417) Direct

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock 72263 Indirect

Footnotes

F1: These securities are held in a trust for the benefit of the reporting person's children. The reporting person's spouse is trustee of the trust. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

F2: The original option grant for 879,085 option shares vested 25% on March 2, 2016 and in quarterly installments thereafter.