<SEC-DOCUMENT>0001213900-22-007350-index.html : 20220214
<SEC-HEADER>0001213900-22-007350.hdr.sgml : 20220214
<ACCEPTANCE-DATETIME>20220214131018
ACCESSION NUMBER:		0001213900-22-007350
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20220214
DATE AS OF CHANGE:		20220214
GROUP MEMBERS:		JAMES L.L. TULLIS
GROUP MEMBERS:		TULLIS DICKERSON PARTNERS III, L.L.C.
GROUP MEMBERS:		TULLIS GROWTH FUND II, L.P.
GROUP MEMBERS:		TULLIS GROWTH FUND, L.P.
GROUP MEMBERS:		TULLIS-GROWTH PARTNERS II, L.L.C.
GROUP MEMBERS:		TULLIS-GROWTH PARTNERS, L.L.C.

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EXAGEN INC.
		CENTRAL INDEX KEY:			0001274737
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-91300
		FILM NUMBER:		22628648

	BUSINESS ADDRESS:	
		STREET 1:		1261 LIBERTY WAY
		CITY:			VISTA
		STATE:			CA
		ZIP:			92081
		BUSINESS PHONE:		(760) 560-1501

	MAIL ADDRESS:	
		STREET 1:		1261 LIBERTY WAY
		CITY:			VISTA
		STATE:			CA
		ZIP:			92081

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EXAGEN DIAGNOSTICS INC
		DATE OF NAME CHANGE:	20031230

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TULLIS DICKERSON CAPITAL FOCUS III, L.P.
		CENTRAL INDEX KEY:			0001144359
		IRS NUMBER:				000000000

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		2036298700

	MAIL ADDRESS:	
		STREET 1:		ONE GREENWICH PLAZA
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TULLIS DICKERSON CAPITAL FOCUS III LP
		DATE OF NAME CHANGE:	20010706
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>ea155594-13ga2tullis_exagen.htm
<DESCRIPTION>AMENDMENT NO. 2 TO SCHEDULE 13G
<TEXT>
Document 1 - file: ea155594-13ga2tullis_exagen.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ea155594ex99-1_exagen.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: ea155594ex99-1_exagen.htm

</DOCUMENT>
</SEC-DOCUMENT>