Timothy B Lowinger - 08 Jul 2021 Form 4 Insider Report for Mersana Therapeutics, Inc. (MRSN)

Role
CS & Technology Officer
Signature
/s/ Brian DeSchuytner, as Attorney-in-Fact
Issuer symbol
MRSN
Transactions as of
08 Jul 2021
Net transactions value
+$28,000
Form type
4
Filing time
09 Jul 2021, 17:25:29 UTC
Previous filing
02 Jul 2021
Next filing
19 Jul 2021
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 $28,000 +20,000 +64% $1.40 51,444 08 Jul 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 -20,000 -30% $0.000000 45,593 08 Jul 2021 Common Stock 20,000 $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 August 1, 2013, and in equal quarterly installments thereafter.