<SEC-DOCUMENT>0000899243-20-020242-index.html : 20200723
<SEC-HEADER>0000899243-20-020242.hdr.sgml : 20200723
<ACCEPTANCE-DATETIME>20200723190103
ACCESSION NUMBER:		0000899243-20-020242
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200723
FILED AS OF DATE:		20200723
DATE AS OF CHANGE:		20200723

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Clarus Ventures III GP, L.P.
		CENTRAL INDEX KEY:			0001620148
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044727

	BUSINESS ADDRESS:	
		STREET 1:		C/O CLARUS VENTURES
		STREET 2:		101 MAIN STREET, SUITE 1210
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-949-2200

	MAIL ADDRESS:	
		STREET 1:		C/O CLARUS VENTURES
		STREET 2:		101 MAIN STREET, SUITE 1210
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Blackstone Clarus III L.L.C.
		CENTRAL INDEX KEY:			0001762202
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044728

	BUSINESS ADDRESS:	
		STREET 1:		C/O THE BLACKSTONE GROUP L.P.
		STREET 2:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		212-583-5000

	MAIL ADDRESS:	
		STREET 1:		C/O THE BLACKSTONE GROUP L.P.
		STREET 2:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Blackstone Holdings II L.P.
		CENTRAL INDEX KEY:			0001484870

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044729

	BUSINESS ADDRESS:	
		STREET 1:		C/O  THE BLACKSTONE GROUP
		STREET 2:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		212-583-5000

	MAIL ADDRESS:	
		STREET 1:		C/O  THE BLACKSTONE GROUP
		STREET 2:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Blackstone Holdings I/II GP L.L.C.
		CENTRAL INDEX KEY:			0001464695
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044730

	BUSINESS ADDRESS:	
		STREET 1:		C/O THE BLACKSTONE GROUP
		STREET 2:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		2125835000

	MAIL ADDRESS:	
		STREET 1:		C/O THE BLACKSTONE GROUP
		STREET 2:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154

	FORMER NAME:	
		FORMER CONFORMED NAME:	Blackstone Holdings I/II GP Inc
		DATE OF NAME CHANGE:	20090521

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Blackstone Group Inc
		CENTRAL INDEX KEY:			0001393818
		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044731

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		(212) 583-5000

	MAIL ADDRESS:	
		STREET 1:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154

	FORMER NAME:	
		FORMER CONFORMED NAME:	Blackstone Group L.P.
		DATE OF NAME CHANGE:	20070320

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Blackstone Group Management L.L.C.
		CENTRAL INDEX KEY:			0001404071
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044732

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		(212) 583-5000

	MAIL ADDRESS:	
		STREET 1:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SCHWARZMAN STEPHEN A
		CENTRAL INDEX KEY:			0001070844

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044733

	MAIL ADDRESS:	
		STREET 1:		C/O THE BLACKSTONE GROUP
		STREET 2:		345 PARK AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Clarus Lifesciences III, L.P.
		CENTRAL INDEX KEY:			0001597143
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1214

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39402
		FILM NUMBER:		201044734

	BUSINESS ADDRESS:	
		STREET 1:		101 MAIN STREET
		STREET 2:		SUITE 1210
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-949-2200

	MAIL ADDRESS:	
		STREET 1:		101 MAIN STREET
		STREET 2:		SUITE 1210
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

ISSUER:		

	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

	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>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<DESCRIPTION>FORM 3 SUBMISSION
<TEXT>
Document 1 - file: doc3.html

Document 1 - RAW XML: doc3.xml

</DOCUMENT>
</SEC-DOCUMENT>