0001104659-21-084647.txt : 20210623
0001104659-21-084647.hdr.sgml : 20210623
20210623163051
ACCESSION NUMBER: 0001104659-21-084647
CONFORMED SUBMISSION TYPE: 4
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20210621
FILED AS OF DATE: 20210623
DATE AS OF CHANGE: 20210623
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: 211039012
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
tm2120515-1_4seq1.xml
OWNERSHIP DOCUMENT
X0306
4
2021-06-21
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
2021-06-21
4
M
0
2
3.51
A
31446
D
Common Stock
2021-06-21
4
S
0
2
13.78
D
31444
D
Common Stock
2021-06-21
4
M
0
2218
6.16
A
33662
D
Common Stock
2021-06-21
4
S
0
2218
13.78
D
31444
D
Stock Option (right to buy)
3.51
2021-06-21
4
M
0
2
0
D
2029-01-22
Common Stock
2
12180
D
Stock Option (right to buy)
6.16
2021-06-21
4
M
0
2218
0
D
2030-01-14
Common Stock
2218
81647
D
Transaction effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 12, 2020.
The option vests in equal quarterly installments over the first four years after the vesting commencement date, January 23, 2019.
The option vests in equal quarterly installments over the first four years after the vesting commencement date, January 15, 2020.
/s/ Brian DeSchuytner, as Attorney-in-Fact
2021-06-23