Jeffrey G. Black - 12 Mar 2026 Form 4 Insider Report for EXAGEN INC. (XGN)

Role: Chief Financial Officer
Signature: /s/ Jeffrey G. Black
Issuer symbol: XGN
Transactions as of: 12 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 16 Mar 2026, 19:17:29 UTC
Previous filing: 25 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Black Jeffrey G.	Chief Financial Officer	C/O EXAGEN INC., 1261 LIBERTY WAY, VISTA	/s/ Jeffrey G. Black	16 Mar 2026	0001449439

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	XGN	Common Stock	Award		+75,000	+28%	$3.16^*	342,442	12 Mar 2026	Direct	F1
transaction	XGN	Common Stock	Award		+1,511	+0.44%	$3.08^*	343,953	27 Feb 2026	Direct	F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	XGN	Stock Option(right to buy)	Award		+50,000	+500%	$3.16^*	60,000	12 Mar 2026	Common Stock	50,000	$3.16	Direct	F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The securities awarded are in the form of restricted stock units under the issuer's 2019 Incentive Award Plan. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The restricted stock unit will vest with respect to 25% of the restricted stock units on each of the first, second, third and fourth anniversaries of February 21, 2026, subject to the Reporting Person's continued service through the applicable vesting date. In addition, the award may become fully vested upon a qualifying termination of employment in connection with a change in control.
F2	The reporting person is voluntarily reporting the acquisition of the Issuer's common stock pursuant to the Employee Stock Purchase Plan ("ESPP").
F3	Represents shares of common stock purchased through ESPP in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).
F4	The option is exercisable as it vests. 25% of the shares subject to the option vest on February 21, 2027, and 1/48th of the total number of shares subject to the option vest at the end of each calendar month thereafter, subject to the Reporting Person's continued service to the Issuer through each such vesting date. In addition, the stock option may become fully vested upon a qualifying termination of employment in connection with a change in control.