0001104659-21-005951.txt : 20210120
0001104659-21-005951.hdr.sgml : 20210120
20210120190502
ACCESSION NUMBER: 0001104659-21-005951
CONFORMED SUBMISSION TYPE: 4
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20210115
FILED AS OF DATE: 20210120
DATE AS OF CHANGE: 20210120
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Lowinger Timothy B
CENTRAL INDEX KEY: 0001709775
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-38129
FILM NUMBER: 21539999
MAIL ADDRESS:
STREET 1: 840 MEMORIAL DRIVE
CITY: CAMBRIDGE
STATE: MA
ZIP: 02139
ISSUER:
COMPANY DATA:
COMPANY CONFORMED NAME: Mersana Therapeutics, Inc.
CENTRAL INDEX KEY: 0001442836
STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834]
IRS NUMBER: 000000000
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
BUSINESS ADDRESS:
STREET 1: 840 MEMORIAL DRIVE
CITY: CAMBRIDGE
STATE: MA
ZIP: 02139
BUSINESS PHONE: 617-498-0020
MAIL ADDRESS:
STREET 1: 840 MEMORIAL DRIVE
CITY: CAMBRIDGE
STATE: MA
ZIP: 02139
FORMER COMPANY:
FORMER CONFORMED NAME: MERSANA THERAPEUTICS INC
DATE OF NAME CHANGE: 20080813
4
1
tm211948-11_4seq1.xml
OWNERSHIP DOCUMENT
X0306
4
2021-01-15
0
0001442836
Mersana Therapeutics, Inc.
MRSN
0001709775
Lowinger Timothy B
C/O MERSANA THERAPEUTICS, INC.
840 MEMORIAL DRIVE
CAMBRIDGE
MA
02139
0
1
0
0
Chief Science & Tech. Officer
Common Stock
2021-01-15
4
M
0
7917
A
33768
D
Common Stock
2021-01-15
4
F
0
2324
21.09
D
31444
D
Restricted Stock Units
2021-01-15
4
M
0
7917
0
D
Common Stock
7917
23750
D
Stock Option (right to buy)
21.09
2021-01-15
4
A
0
131250
0
A
2031-01-15
Common Stock
131250
131250
D
Restricted Stock Units
2021-01-15
4
A
0
29167
0
A
Common Stock
29167
29167
D
Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.
Represents the number of shares of common stock that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the RSUs and does not represent a sale by the reporting person
25% of the total number of RSUs vested on January 15, 2021, and thereafter shall vest in equal annual installments over the next three years.
The option vests in equal quarterly installments over the first four years after the vesting commencement date, January 15, 2021.
The restricted stock units vest in equal annual installments over the first four years after the vesting commencement date, January 15, 2021.
/s/ Brian DeSchuytner, as Attorney-in-Fact
2021-01-20