Martin H. Huber Jr. - Sep 11, 2023 Form 4 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
President, CEO, Director
Signature
/s/ Alejandra Carvajal, Attorney-in-Fact
Stock symbol
MRSN
Transactions as of
Sep 11, 2023
Transactions value $
$0
Form type
4
Date filed
9/13/2023, 05:01 PM
Previous filing
Aug 18, 2023
Next filing
Oct 4, 2023

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MRSN Stock option (right to buy) Award $0 +1M $0.00 1M Sep 11, 2023 Common Stock 1M $1.32 Direct F1
transaction MRSN Restricted stock unit Award $0 +667K $0.00 667K Sep 11, 2023 Common Stock 667K Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 25% of the shares subject to the option will vest on the first anniversary of the grant, and the remainder shall vest in 12 equal quarterly installments thereafter, subject to the Reporting Person's continuous service to the Issuer through each such vesting date.
F2 Each restricted stock unit ("RSU") represents the contingent right to receive one share of Common Stock of the Issuer.
F3 The RSUs shall vest in equal annual installments over four years from the date of grant, subject to the Reporting Person's continuous service to the Issuer through each such vesting date.