<SEC-DOCUMENT>0001193125-21-247967-index.html : 20210816
<SEC-HEADER>0001193125-21-247967.hdr.sgml : 20210816
<ACCEPTANCE-DATETIME>20210816171927
ACCESSION NUMBER:		0001193125-21-247967
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20210816
DATE AS OF CHANGE:		20210816
EFFECTIVENESS DATE:		20210816

FILER:

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

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-258863
		FILM NUMBER:		211179870

	BUSINESS ADDRESS:	
		STREET 1:		180 KIMBALL WAY
		STREET 2:		SUITE 200
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		(650)-822-5500

	MAIL ADDRESS:	
		STREET 1:		180 KIMBALL WAY
		STREET 2:		SUITE 200
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
</SEC-HEADER>
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<TYPE>S-3ASR
<SEQUENCE>1
<FILENAME>d552596ds3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: d552596ds3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.4
<SEQUENCE>2
<FILENAME>d552596dex44.htm
<DESCRIPTION>EX-4.4
<TEXT>
Document 2 - file: d552596dex44.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>3
<FILENAME>d552596dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 3 - file: d552596dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>d552596dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 4 - file: d552596dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g552596a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g552596a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g552596b.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g552596b.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g552596g16w09.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g552596g16w09.jpg

</DOCUMENT>
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