<SEC-DOCUMENT>0001193125-23-282294-index.html : 20231122
<SEC-HEADER>0001193125-23-282294.hdr.sgml : 20231122
<ACCEPTANCE-DATETIME>20231122163927
ACCESSION NUMBER:		0001193125-23-282294
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20231122
DATE AS OF CHANGE:		20231122
GROUP MEMBERS:		BAHARAK ASEFZADEH
GROUP MEMBERS:		BAKEZILLA 2019 IRREVOCABLE TRUST
GROUP MEMBERS:		BARBARA P. MARTIN
GROUP MEMBERS:		SINGER ASEFZADEH FAMILY HOLDING TRUST
GROUP MEMBERS:		THIRSTY BROOK 2010 IRREVOCABLE TRUST

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Cartesian Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001453687
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-89550
		FILM NUMBER:		231434027

	BUSINESS ADDRESS:	
		STREET 1:		65 GROVE STREET
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472
		BUSINESS PHONE:		617-923-1400

	MAIL ADDRESS:	
		STREET 1:		65 GROVE STREET
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SELECTA BIOSCIENCES INC
		DATE OF NAME CHANGE:	20090109

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Singer Michael
		CENTRAL INDEX KEY:			0002000122

	FILING VALUES:
		FORM TYPE:		SC 13D

	MAIL ADDRESS:	
		STREET 1:		C/O CARTESIAN THERAPEUTICS, INC.
		STREET 2:		704 QUINCE ORCHARD RD
		CITY:			GAITHERSBURG
		STATE:			MD
		ZIP:			20878
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>d461930dsc13d.htm
<DESCRIPTION>SC 13D
<TEXT>
Document 1 - file: d461930dsc13d.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d461930dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d461930dex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>d461930dex992.htm
<DESCRIPTION>EX-99.2
<TEXT>
Document 3 - file: d461930dex992.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>4
<FILENAME>d461930dex993.htm
<DESCRIPTION>EX-99.3
<TEXT>
Document 4 - file: d461930dex993.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.4
<SEQUENCE>5
<FILENAME>d461930dex994.htm
<DESCRIPTION>EX-99.4
<TEXT>
Document 5 - file: d461930dex994.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.5
<SEQUENCE>6
<FILENAME>d461930dex995.htm
<DESCRIPTION>EX-99.5
<TEXT>
Document 6 - file: d461930dex995.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.6
<SEQUENCE>7
<FILENAME>d461930dex996.htm
<DESCRIPTION>EX-99.6
<TEXT>
Document 7 - file: d461930dex996.htm

</DOCUMENT>
</SEC-DOCUMENT>