<SEC-DOCUMENT>0001193125-23-039175-index.html : 20230214 <SEC-HEADER>0001193125-23-039175.hdr.sgml : 20230214 <ACCEPTANCE-DATETIME>20230214161807 ACCESSION NUMBER: 0001193125-23-039175 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20230214 DATE AS OF CHANGE: 20230214 GROUP MEMBERS: BIOTECH TARGET N.V. SUBJECT COMPANY: 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 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-90033 FILM NUMBER: 23629633 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 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: BB BIOTECH AG CENTRAL INDEX KEY: 0000924223 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 000000000 STATE OF INCORPORATION: V8 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: SCHWERTSTRASSE 6 CITY: SCHAFFHAUSEN STATE: V8 ZIP: 8200 BUSINESS PHONE: 411724 59 59 MAIL ADDRESS: STREET 1: SCHWERTSTRASSE 6 CITY: SCHAFFHAUSEN STATE: V8 ZIP: 8200 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G/A <SEQUENCE>1 <FILENAME>d466514dsc13ga.htm <DESCRIPTION>SC 13G/A <TEXT> Document 1 - file: d466514dsc13ga.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.B <SEQUENCE>2 <FILENAME>d466514dex99b.htm <DESCRIPTION>EX-99.B <TEXT> Document 2 - file: d466514dex99b.htm
</DOCUMENT> </SEC-DOCUMENT>