<SEC-DOCUMENT>0001193125-25-280384-index.html : 20251113
<SEC-HEADER>0001193125-25-280384.hdr.sgml : 20251113
<ACCEPTANCE-DATETIME>20251113165225
ACCESSION NUMBER:		0001193125-25-280384
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20251113
DATE AS OF CHANGE:		20251113

FILER:

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

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-278246
		FILM NUMBER:		251479405

	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
</SEC-HEADER>
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<TYPE>424B5
<SEQUENCE>1
<FILENAME>d34136d424b5.htm
<DESCRIPTION>424B5
<TEXT>
Document 1 - file: d34136d424b5.htm

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<SEQUENCE>2
<FILENAME>g34136g00r00.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g34136g00r00.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g34136g01g01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g34136g01g01.jpg

</DOCUMENT>
</SEC-DOCUMENT>