| 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 | 04 Mar 2026 | 0001843113 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | XGN | Common Stock | Sale | $56,827 | -15,698 | -2.2% | $3.62 | 687,299 | 03 Mar 2026 | Direct | F1 |
| transaction | XGN | Common Stock | Award | +2,535 | +0.37% | $3.08* | 689,834 | 03 Mar 2026 | Direct | F2, F3 | |
| holding | XGN | Common Stock | 40,401 | 03 Mar 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. |
| 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). |