| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| ABALLI JOHN | President and CEO, Director | C/O EXAGEN INC., 1261 LIBERTY WAY, VISTA | /s/ Jeffrey G. Black, as attorney-in-fact | 25 Feb 2026 | 0001843113 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | XGN | Common Stock | Sale | $41,262 | -11,430 | -1.6% | $3.61 | 702,997 | 24 Feb 2026 | Direct | F1 |
| holding | XGN | Common Stock | 40,401 | 24 Feb 2026 | by Spouse |
| Id | Content |
|---|---|
| F1 | The sale reported on this Form 4 represents shares sold by the Reporting Person, at the direction of the Issuer, to cover tax withholding obligations in connection with the vesting and settlement of Restricted Stock Units. The sale is mandated solely by the Issuer and does not represent a discretionary transaction by the Reporting Person. |