SEC Form 4 
FORM 4	UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 	  
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	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).			
1. Name and Address of Reporting Person*
H.I.G. Bio-Exagen, L.P.	

(Last)	(First)	(Middle)	
1450 BRICKELL AVENUE, 31ST FLOOR	

(Street) 
MIAMI	FL	33131	

(City)	(State)	(Zip)	
	2. Issuer Name and Ticker or Trading Symbol 
EXAGEN INC. [ XGN ] 	5. Relationship of Reporting Person(s) to Issuer 
(Check all applicable) 
	Director	X	10% Owner	
	Officer (give title below)		Other (specify below)	

	3. Date of Earliest Transaction (Month/Day/Year)
09/23/2019 		
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) 
	Form filed by One Reporting Person	
X	Form filed by More than One Reporting Person	
	
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned	
1. Title of Security (Instr. 3) 	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8) 	4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 	5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 	7. Nature of Indirect Beneficial Ownership (Instr. 4) 	
			Code	V	Amount	(A) or (D)	Price				
Common Stock	09/23/2019		C		1,271,252	A	$0.00 	1,271,252	I	See footnote(1) 	
Common Stock	09/23/2019		P		425,000	A	$14 	1,696,252	I	See footnote(1) 	
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities) 	
1. Title of Derivative Security (Instr. 3) 	2. Conversion or Exercise Price of Derivative Security 	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8) 	5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 	6. Date Exercisable and Expiration Date (Month/Day/Year)	7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 	8. Price of Derivative Security (Instr. 5) 	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 	11. Nature of Indirect Beneficial Ownership (Instr. 4) 	
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares					
Series H Redeemable Convertible Preferred Stock	(2)	09/23/2019		C			233,446,519	(2) 	(2) 	Common Stock	1,271,252	(2)	0	I	See footnote(1) 	
1. Name and Address of Reporting Person*
H.I.G. Bio-Exagen, L.P.	

(Last)	(First)	(Middle)	
1450 BRICKELL AVENUE, 31ST FLOOR	

(Street) 
MIAMI	FL	33131	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
H.I.G.-GPII, Inc.	

(Last)	(First)	(Middle)	
1450 BRICKELL AVENUE, 31ST FLOOR	

(Street) 
MIAMI	FL	33131	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
TAMER ANTHONY	

(Last)	(First)	(Middle)	
1450 BRICKELL AVENUE, 31ST FLOOR	

(Street) 
MIAMI	FL	33131	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
MNAYMNEH SAMI	

(Last)	(First)	(Middle)	
1450 BRICKELL AVENUE, 31ST FLOOR	

(Street) 
MIAMI	FL	33131	

(City)	(State)	(Zip)	
	
Explanation of Responses:	
1. The shares reported on this form are held of record by H.I.G. Bio-Exagen, L.P. ("H.I.G."). H.I.G.-GPII, Inc. ("H.I.G. GP") is the general partner of H.I.G. and has sole voting and investment control over the shares owned by H.I.G. Anthony Tamer and Sami Mnaymneh are the sole shareholders of H.I.G. GP and may be deemed to share beneficial ownership of the shares held by H.I.G. Bio-Exagen, L.P. Each of Mr. Tamer and Mr. Mnaymneh disclaims beneficial ownership of the shares reported herein except to the extent of their pecuniary interest, if any.	
2. The Series H Redeemable Convertible Preferred Stock ("Series H") is convertible into the Issuer's Common Stock on a 183.635-for-one basis at the holder's election and has no expiration date. The Series H automatically converted into Common Stock upon the closing of the Issuer's initial public offering.	
Remarks:	
	
	H.I.G. Bio-Exagen, L.P., By: H.I.G.-GPII, Inc., its general partner, /s/ Richard Siegel, Name: Richard Siegel, Title: Authorized Signatory	09/23/2019	
	H.I.G.-GPII, Inc., By: H.I.G.-GPII, Inc., its general partner, /s/ Richard Siegel, Name: Richard Siegel, Title: Authorized Signatory	09/23/2019	
	/s/ Anthony Tamer	09/23/2019	
	/s/ Sami Mnaymneh	09/23/2019	
	** Signature of Reporting Person	Date	
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.	
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).	
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).	
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