<SEC-DOCUMENT>0001104659-22-066277-index.html : 20220531 <SEC-HEADER>0001104659-22-066277.hdr.sgml : 20220531 <ACCEPTANCE-DATETIME>20220531083817 ACCESSION NUMBER: 0001104659-22-066277 CONFORMED SUBMISSION TYPE: SC TO-T/A PUBLIC DOCUMENT COUNT: 4 FILED AS OF DATE: 20220531 DATE AS OF CHANGE: 20220531 GROUP MEMBERS: SCANDINAVIAN ACQUISITION SUB, INC. SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Checkmate Pharmaceuticals, Inc. CENTRAL INDEX KEY: 0001651431 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] IRS NUMBER: 364813934 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC TO-T/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-91617 FILM NUMBER: 22980688 BUSINESS ADDRESS: STREET 1: 245 MAIN STREET, 2ND FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 978-503-2124 MAIL ADDRESS: STREET 1: 245 MAIN STREET, 2ND FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: REGENERON PHARMACEUTICALS, INC. CENTRAL INDEX KEY: 0000872589 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 133444607 STATE OF INCORPORATION: NY FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC TO-T/A BUSINESS ADDRESS: STREET 1: 777 OLD SAW MILL RIVER ROAD CITY: TARRYTOWN STATE: NY ZIP: 10591 BUSINESS PHONE: 9148477000 MAIL ADDRESS: STREET 1: 777 OLD SAW MILL RIVER ROAD CITY: TARRYTOWN STATE: NY ZIP: 10591 FORMER COMPANY: FORMER CONFORMED NAME: REGENERON PHARMACEUTICALS INC DATE OF NAME CHANGE: 19930328 </SEC-HEADER> <DOCUMENT> <TYPE>SC TO-T/A <SEQUENCE>1 <FILENAME>tm2215205d3_sctot.htm <DESCRIPTION>SC TO-T/A <TEXT> Document 1 - file: tm2215205d3_sctot.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.(A)(5)(A) <SEQUENCE>2 <FILENAME>tm2215205d3_ex99-a5a.htm <DESCRIPTION>EXHIBIT 99.(A)(5)(A) <TEXT> Document 2 - file: tm2215205d3_ex99-a5a.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>3 <FILENAME>tm2215205d3_ex99-a5aimg01.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 3 - file: tm2215205d3_ex99-a5aimg01.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>4 <FILENAME>tm2215205d3_ex99-a5aimg02.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 4 - file: tm2215205d3_ex99-a5aimg02.jpg
</DOCUMENT> </SEC-DOCUMENT>