<SEC-DOCUMENT>0001564590-20-057466-index.html : 20201217
<SEC-HEADER>0001564590-20-057466.hdr.sgml : 20201217
<ACCEPTANCE-DATETIME>20201217163233
ACCESSION NUMBER:		0001564590-20-057466
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		10
FILED AS OF DATE:		20201217
DATE AS OF CHANGE:		20201217
EFFECTIVENESS DATE:		20201217

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-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-251424
		FILM NUMBER:		201396486

	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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<TYPE>S-8
<SEQUENCE>1
<FILENAME>abio-s8.htm
<DESCRIPTION>S-8
<TEXT>
Document 1 - file: abio-s8.htm

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<FILENAME>abio-ex51_39.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: abio-ex51_39.htm

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<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>abio-ex232_6.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 3 - file: abio-ex232_6.htm

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Document 4 - file: g23gjhpzhlcs000001.jpg

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Document 5 - file: g23gjhpzhlcs000006.jpg

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Document 6 - file: g23gjhpzhlcs000005.jpg

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Document 7 - file: g23gjhpzhlcs000002.jpg

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Document 8 - file: g23gjhpzhlcs000003.jpg

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Document 9 - file: g23gjhpzhlcs000004.jpg

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<SEQUENCE>10
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Document 10 - file: g25kcdflqaux000001.jpg

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