Anna Protopapas - Jan 14, 2022 Form 4 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
President & CEO, Director
Signature
/s/ Brian DeSchuytner, as Attorney-in-Fact
Stock symbol
MRSN
Transactions as of
Jan 14, 2022
Transactions value $
$0
Form type
4
Date filed
1/19/2022, 05:01 PM
Previous filing
Jul 19, 2021
Next filing
Mar 31, 2022

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MRSN Common Stock Options Exercise +39K +13.72% 323K Jan 14, 2022 Direct F1

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 Restricted Stock Units Options Exercise $0 -17.7K -33.33% $0.00 35.4K Jan 14, 2022 Common Stock 17.7K Direct F1, F2
transaction MRSN Restricted Stock Units Options Exercise $0 -21.3K -25% $0.00 63.8K Jan 14, 2022 Common Stock 21.3K Direct F1, F3
transaction MRSN Stock Option (right to buy) Award $0 +301K $0.00 301K Jan 14, 2022 Common Stock 301K $6.28 Direct F4
transaction MRSN Restricted Stock Units Award $0 +67K $0.00 67K Jan 14, 2022 Common Stock 67K Direct F1, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon vesting.
F2 50% of the total number of RSUs vested as of January 14, 2022, and thereafter shall vest in equal annual installments over the next two years.
F3 25% of the total number of RSUs vested on January 14, 2022, and thereafter shall vest in equal annual installments over the next three years.
F4 The option vests in equal quarterly installments over the first four years after the vesting commencement date, January 14, 2022.
F5 The restricted stock units vest in equal annual installments over the first four years after the vesting commencement date, January 14, 2022.