Anna Protopapas - Sep 11, 2023 Form 4 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
Director
Signature
/s/ Alejandra Carvajal, as attorney-in-fact
Stock symbol
MRSN
Transactions as of
Sep 11, 2023
Transactions value $
$0
Form type
4
Date filed
9/13/2023, 04:02 PM
Previous filing
Jun 16, 2023
Next filing
Dec 20, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MRSN Common Stock Award $0 +16.6K +32.66% $0.00 67.6K Sep 11, 2023 Direct F1, F2, F3
holding MRSN Common Stock 240K Sep 11, 2023 By Trust F4
holding MRSN Common Stock 72.3K Sep 11, 2023 By Trust F5

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 +16.6K $0.00 16.6K Sep 11, 2023 Common Stock 16.6K $1.32 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents a restricted stock unit ("RSU") award. Each RSU represents the contingent right to receive one share of Common Stock of the Issuer.
F2 The award will vest in full on the earlier of June 8, 2024 or the date of the 2024 Annual Meeting of Stockholders of the Issuer, subject to the Reporting Person's continuous service to the Issuer on such vesting date.
F3 Includes 2,218 shares of common stock acquired on June 15, 2023 by the Reporting Person through the Issuer's employee stock purchase plan while the Reporting Person was employed as the Issuer's President and Chief Executive Officer.
F4 These shares of common stock are held by the Anna Protopapas Irrevocable Trust (the "Protopapas Trust") for the benefit of the Reporting Person's spouse and children. The Reporting Person's spouse is the trustee of the Protopapas Trust.
F5 These shares of common stock are held by the Kinney/Protopapas Family Irrevocable Trust (the "Kinney/Protopapas Trust") for the benefit of the Reporting Person's children. The Reporting Person's spouse is a co-trustee of the Kinney/Protopapas Trust.