<SEC-DOCUMENT>0001193125-20-050219-index.html : 20200226
<SEC-HEADER>0001193125-20-050219.hdr.sgml : 20200226
<ACCEPTANCE-DATETIME>20200226170840
ACCESSION NUMBER:		0001193125-20-050219
CONFORMED SUBMISSION TYPE:	S-1
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20200226
DATE AS OF CHANGE:		20200226

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARCA biopharma, Inc.
		CENTRAL INDEX KEY:			0000907654
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				363855489
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-1
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-236667
		FILM NUMBER:		20656981

	BUSINESS ADDRESS:	
		STREET 1:		11080 CIRCLEPOINT ROAD
		STREET 2:		SUITE 140
		CITY:			WESTMINSTER
		STATE:			CO
		ZIP:			80020
		BUSINESS PHONE:		720-940-2200

	MAIL ADDRESS:	
		STREET 1:		11080 CIRCLEPOINT ROAD
		STREET 2:		SUITE 140
		CITY:			WESTMINSTER
		STATE:			CO
		ZIP:			80020

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVELO INC
		DATE OF NAME CHANGE:	20030203

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HYSEQ INC
		DATE OF NAME CHANGE:	19970610
</SEC-HEADER>
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<SEQUENCE>1
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<DESCRIPTION>S-1
<TEXT>
Document 1 - file: d885145ds1.htm

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<SEQUENCE>2
<FILENAME>d885145dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: d885145dex231.htm

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<SEQUENCE>3
<FILENAME>g885145g21e97.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g885145g21e97.jpg

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<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g885145g21p44.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g885145g21p44.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g885145g63a21.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g885145g63a21.jpg

</DOCUMENT>
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