Timothy B Lowinger - 20 Dec 2021 Form 4 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
Chief Science & Tech. Officer
Signature
/s/ Brian DeSchuytner, as Attorney-in-Fact
Issuer symbol
MRSN
Transactions as of
20 Dec 2021
Net transactions value
+$63,830
Form type
4
Filing time
20 Dec 2021, 16:01:16 UTC
Previous filing
24 Aug 2021
Next filing
19 Jan 2022
SEC
View on sec.gov

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MRSN Common Stock Options Exercise $63,830 +45,593 +61% $1.40 120,766 20 Dec 2021 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
transaction MRSN Stock Option (right to buy) Options Exercise $0 -45,593 -100% $0.000000* 0 20 Dec 2021 Common Stock 45,593 $1.40 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The option vested 25% on October 2, 2013, and in equal quarterly installments thereafter.