Mohan Bala - Sep 5, 2023 Form 3 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
SVP, Chief Development Officer
Signature
/s/ Alejandra Carvajal, as attorney-in-fact
Stock symbol
MRSN
Transactions as of
Sep 5, 2023
Transactions value $
$0
Form type
3
Date filed
9/7/2023, 06:46 PM
Next filing
Oct 27, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding MRSN Common Stock 4.4K Sep 5, 2023 Direct

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
holding MRSN Stock Option (right to buy) Sep 5, 2023 Common Stock 113K $8.63 Direct F1
holding MRSN Stock Option (right to buy) Sep 5, 2023 Common Stock 158K $6.06 Direct F2
holding MRSN Restricted stock unit Sep 5, 2023 Common Stock 18.8K $0.00 Direct F3, F4
holding MRSN Restricted stock unit Sep 5, 2023 Common Stock 35K $0.00 Direct F4, F5
holding MRSN Restricted stock unit Sep 5, 2023 Common Stock 50K $0.00 Direct F4, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 25% of the shares underlying the option vested on October 25, 2022, and the remainder vested or will vest in equal quarterly installments thereafter, subject to the Reporting Person's continued service to the Issuer on such vesting date.
F2 The shares underlying the option vested or will vest in equal quarterly installments over four years following the date of grant, January 13, 2023, subject to the Reporting Person's continued service to the Issuer on such vesting date.
F3 The restricted stock units ("RSUs") will vest in three equal installments on October 25, 2023, October 25, 2024, and October 25, 2025, subject to the Reporting Person's continued service to the Issuer on such vesting date.
F4 Each RSU represents the contingent right to receive one share of common stock of the Issuer.
F5 The RSUs will vest in equal annual installments over four years following the date of grant, January 13, 2023, subject to the Reporting Person's continued service to the Issuer on such vesting date.
F6 The RSUs will vest on October 1, 2024, subject to the Reporting Person's continued service to the Issuer on such vesting date.

Remarks:

Exhibit 24 - Power of Attorney