<SEC-DOCUMENT>0000935836-21-000238-index.html : 20210310
<SEC-HEADER>0000935836-21-000238.hdr.sgml : 20210310
<ACCEPTANCE-DATETIME>20210310170229
ACCESSION NUMBER:		0000935836-21-000238
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210310
DATE AS OF CHANGE:		20210310

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ANAPTYSBIO, INC
		CENTRAL INDEX KEY:			0001370053
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				203828755
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-89797
		FILM NUMBER:		21730621

	BUSINESS ADDRESS:	
		STREET 1:		10421 PACIFIC CENTER COURT, SUITE 200
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		858-362-6295

	MAIL ADDRESS:	
		STREET 1:		10421 PACIFIC CENTER COURT, SUITE 200
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ANAPTYSBIO INC
		DATE OF NAME CHANGE:	20080828

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ANAPTYS BIOSCIENCES INC
		DATE OF NAME CHANGE:	20060724

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EcoR1 Capital Fund, L.P.
		CENTRAL INDEX KEY:			0001567938
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	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 13D
<SEQUENCE>1
<FILENAME>anaptysbio13d.htm
<TEXT>
Document 1 - file: anaptysbio13d.htm

</DOCUMENT>
</SEC-DOCUMENT>