JOINT FILING AGREEMENT
Exhibit 99.1
In accordance with Rule 13d−1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on
behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock of Mersana Therapeutics, Inc. and further agree that this Joint Filing Agreement be included as an Exhibit to such joint filings.
In evidence thereof, the undersigned, being duly authorized, have executed this Joint Filing Agreement this 11th day of March, 2019.
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By:
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/s/ Xxxx XxXxxxx
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Name: Xxxx XxXxxxx
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Title: General Counsel
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SARISSA CAPITAL OFFSHORE MASTER FUND LP
By: Sarissa Capital Offshore Fund GP LLC, its general partner
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By:
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/s/ Xxxx XxXxxxx
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Name: Xxxx XxXxxxx
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Title: Authorized Person
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SARISSA CAPITAL CATAPULT FUND LLC
By: Sarissa Capital Management LP, its managing member
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By:
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/s/ Xxxx XxXxxxx
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Name: Xxxx XxXxxxx
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Title: General Counsel
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SARISSA CAPITAL HAWKEYE FUND LP
By: Sarissa Capital Fund GP LP, its general partner
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By:
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/s/ Xxxx XxXxxxx
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Name: Xxxx XxXxxxx
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Title: Authorized Person
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/s/Xxxxxxxxx X. Xxxxxx
Xxxxxxxxx X. Xxxxxx
Xxxxxxxxx X. Xxxxxx
