<SEC-DOCUMENT>0000935836-21-000156-index.html : 20210216
<SEC-HEADER>0000935836-21-000156.hdr.sgml : 20210216
<ACCEPTANCE-DATETIME>20210216121014
ACCESSION NUMBER:		0000935836-21-000156
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210216
DATE AS OF CHANGE:		20210216

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Avidity Biosciences, Inc.
		CENTRAL INDEX KEY:			0001599901
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				461336960
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91534
		FILM NUMBER:		21634779

	BUSINESS ADDRESS:	
		STREET 1:		10975 N. TORREY PINES RD.,
		STREET 2:		#150
		CITY:			LA JOLLA
		STATE:			CA
		ZIP:			92037
		BUSINESS PHONE:		858-401-7900

	MAIL ADDRESS:	
		STREET 1:		10975 N. TORREY PINES RD.,
		STREET 2:		#150
		CITY:			LA JOLLA
		STATE:			CA
		ZIP:			92037

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Avidity Biosciences LLC
		DATE OF NAME CHANGE:	20161227

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Avidity NanoMedicines LLC
		DATE OF NAME CHANGE:	20140211

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EcoR1 Capital, LLC
		CENTRAL INDEX KEY:			0001587114
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		357 TEHAMA STREET #3
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94103
		BUSINESS PHONE:		415-448-6534

	MAIL ADDRESS:	
		STREET 1:		357 TEHAMA STREET #3
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94103
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>rna13g.htm
<TEXT>
Document 1 - file: rna13g.htm

</DOCUMENT>
</SEC-DOCUMENT>