<SEC-DOCUMENT>0001104659-22-047376-index.html : 20220419
<SEC-HEADER>0001104659-22-047376.hdr.sgml : 20220419
<ACCEPTANCE-DATETIME>20220419165032
ACCESSION NUMBER:		0001104659-22-047376
CONFORMED SUBMISSION TYPE:	SC TO-C
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20220419
DATE AS OF CHANGE:		20220419
GROUP MEMBERS:		SCANDANAVIAN 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-C
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91617
		FILM NUMBER:		22835411

	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-C

	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-C
<SEQUENCE>1
<FILENAME>tm2213041d1_sctot.htm
<DESCRIPTION>SC TO-T
<TEXT>
Document 1 - file: tm2213041d1_sctot.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>tm2213041d1_ex99-1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: tm2213041d1_ex99-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>tm2213041d1_ex99-2.htm
<DESCRIPTION>EXHIBIT 99.2
<TEXT>
Document 3 - file: tm2213041d1_ex99-2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>tm2213041d1_ex99-1img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: tm2213041d1_ex99-1img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>tm2213041d1_ex99-2img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: tm2213041d1_ex99-2img001.jpg

</DOCUMENT>
</SEC-DOCUMENT>