<SEC-DOCUMENT>0001193125-18-120604-index.html : 20180418
<SEC-HEADER>0001193125-18-120604.hdr.sgml : 20180418
<ACCEPTANCE-DATETIME>20180418120133
ACCESSION NUMBER:		0001193125-18-120604
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		15
CONFORMED PERIOD OF REPORT:	20180531
FILED AS OF DATE:		20180418
DATE AS OF CHANGE:		20180418
EFFECTIVENESS DATE:		20180418

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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22873
		FILM NUMBER:		18760614

	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>DEF 14A
<SEQUENCE>1
<FILENAME>d521080ddef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: d521080ddef14a.htm

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<FILENAME>g521080bottom.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g521080bottom.jpg

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<FILENAME>g521080dsp003aa.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g521080dsp003aa.jpg

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<FILENAME>g521080dsp01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g521080dsp01.jpg

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<TYPE>GRAPHIC
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<FILENAME>g521080dsp01a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g521080dsp01a.jpg

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<FILENAME>g521080dsp01b.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g521080dsp01b.jpg

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<TYPE>GRAPHIC
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<FILENAME>g521080dsp01c.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g521080dsp01c.jpg

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<FILENAME>g521080dsp01d.jpg
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Document 8 - file: g521080dsp01d.jpg

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<FILENAME>g521080dsp02.jpg
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Document 9 - file: g521080dsp02.jpg

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<FILENAME>g521080dsp03.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g521080dsp03.jpg

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<FILENAME>g521080dsp03b.jpg
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<TEXT>
Document 11 - file: g521080dsp03b.jpg

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<FILENAME>g521080dsp03c.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g521080dsp03c.jpg

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<FILENAME>g521080g49g15.jpg
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<TEXT>
Document 13 - file: g521080g49g15.jpg

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<FILENAME>g521080page_040.jpg
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<TEXT>
Document 14 - file: g521080page_040.jpg

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<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g521080snap1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: g521080snap1.jpg

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