<SEC-DOCUMENT>0001193125-24-105483-index.html : 20240422
<SEC-HEADER>0001193125-24-105483.hdr.sgml : 20240422
<ACCEPTANCE-DATETIME>20240422203527
ACCESSION NUMBER:		0001193125-24-105483
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20240422
DATE AS OF CHANGE:		20240422
GROUP MEMBERS:		BIOTECH GROWTH N.V.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Annexon, Inc.
		CENTRAL INDEX KEY:			0001528115
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				275414423
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91583
		FILM NUMBER:		24862481

	BUSINESS ADDRESS:	
		STREET 1:		1400 SIERRA POINT PARKWAY
		STREET 2:		BLDG C, SUITE 200
		CITY:			BRISBANE
		STATE:			CA
		ZIP:			94005
		BUSINESS PHONE:		(650)-822-5500

	MAIL ADDRESS:	
		STREET 1:		1400 SIERRA POINT PARKWAY
		STREET 2:		BLDG C, SUITE 200
		CITY:			BRISBANE
		STATE:			CA
		ZIP:			94005

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BB BIOTECH AG
		CENTRAL INDEX KEY:			0000924223
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		ORGANIZATION NAME:           	
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			V8
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		SCHWERTSTRASSE 6
		CITY:			SCHAFFHAUSEN
		STATE:			V8
		ZIP:			8200
		BUSINESS PHONE:		411724 59 59

	MAIL ADDRESS:	
		STREET 1:		SCHWERTSTRASSE 6
		CITY:			SCHAFFHAUSEN
		STATE:			V8
		ZIP:			8200
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>d807203dsc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: d807203dsc13g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.A
<SEQUENCE>2
<FILENAME>d807203dex99a.htm
<DESCRIPTION>EX-99.A
<TEXT>
Document 2 - file: d807203dex99a.htm

</DOCUMENT>
</SEC-DOCUMENT>