# EDGAR Filing Document

**Accession Number:** 0001274737
**File Stem:** 0001274737-26-000015
**Filing Date:** 2026-4
**Character Count:** 5656
**Document Hash:** 2dc4eb733dc7b0ee3a2fd367aeed9e61
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001274737-26-000015.hdr.sgml**: 20260423

**ACCESSION NUMBER**: 0001274737-26-000015

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260417

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260423

**DATE AS OF CHANGE**: 20260423

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** EXAGEN INC.
- **CENTRAL INDEX KEY:** 0001274737
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-MEDICAL LABORATORIES [8071]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39049
- **FILM NUMBER:** 26888489

**BUSINESS ADDRESS:**
- **STREET 1:** 1261 LIBERTY WAY
- **CITY:** VISTA
- **STATE:** CA
- **ZIP:** 92081
- **BUSINESS PHONE:** (760) 560-1501

**MAIL ADDRESS:**
- **STREET 1:** 1261 LIBERTY WAY
- **CITY:** VISTA
- **STATE:** CA
- **ZIP:** 92081

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EXAGEN DIAGNOSTICS INC
- **DATE OF NAME CHANGE:** 20031230

?xml version='1.0' encoding='ASCII'? exdx-20260417

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM 8-K** 

**CURRENT REPORT** 

**Pursuant to Section 13 or 15(d)** 

**of the Securities Exchange Act of 1934** 

**Date of Report (Date of earliest event reported): April 17, 2026** 

**EXAGEN INC.** 

**(Exact name of registrant as specified in its charter)** 

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| | | |
|:---|:---|:---|
| **Delaware** | **001-39049** | **20-0434866** |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission**<br>**File Number)** | **(IRS Employer**<br>**Identification No.)** |

---

**1261 Liberty Way** 

**Vista, CA 92081** 

**(Address of principal executive offices) (Zip Code)** 

**(760) 560-1501** 

**(Registrant's telephone number, including area code)** 

**N/A** 

**(Former Name or Former Address, if Changed Since Last Report)** 

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br>**Symbol(s)** | **Name of each exchange**<br>**on which registered** |
| **Common Stock, par value $0.001 per share** | **XGN** | **The Nasdaq Global Market** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 5.02.&nbsp;&nbsp;&nbsp;&nbsp;Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

On April 17, 2026, Ana Hooker notified the Board of Directors (the "Board") of Exagen Inc. (the "Company") of her decision to resign as member of the Board, including all committees thereof, effective April 17, 2026 ("Effective Time"). Ms. Hooker was a member of the Audit Committee and chair of the Nominating and Corporate Governance Committee. Her decision to resign was not due to any disagreement with the Company on any matter relating to the Company's operations, policies or practices. The size of the Board was decreased from eight (8) members to seven (7) members, effective as of the Effective Time.

As of the Effective Time, following the resignation described above, the Committees of the Board will be as follows:

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| | | | |
|:---|:---|:---|:---|
| **Name of Director** | **Audit** | **Compensation** | **Nominating and Corporate Governance** |
| Paul Kim <sup>†</sup> | X | X |  |
| Scott D. Kahn, Ph.D. |  | X | C |
| Tina S. Nova, Ph.D. |  |  |  |
| Bruce C. Robertson, Ph.D. |  | X | X |
| Frank Stokes <sup>†</sup> | C |  | X |
| Charles McKhann | X | C |  |

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<sup>C&nbsp;&nbsp;&nbsp;&nbsp;Committee Chairman</sup>

<sup>†&nbsp;&nbsp;&nbsp;&nbsp;Financial Expert</sup>

**Item 9.01&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits.** 

(d) Exhibits

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| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  | EXAGEN INC. | EXAGEN INC. |
| Date: April 23, 2026 | By: | /s/ Jeffrey G. Black |
|  |  | Jeffrey G. Black |
|  |  | Chief Financial Officer |

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