EXAGEN INC. — Director's Dealing 2025

Feb 25, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: EXAGEN INC. (XGN)
CIK: 0001274737
Period of Report: 2025-02-21

Reporting Person: Black Jeffrey G. (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-21	Common Stock	A	15000	—	Acquired	289492	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-02-21	Stock Option(right to buy)	$3.58	A	10000	Acquired	2035-02-20	Common Stock (10000)	Direct

Footnotes

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, 2025, 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 option is exercisable as it vests. 25% of the shares subject to the option vest on February 21, 2026, 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.