EXAGEN INC.

Item 1. Legal Proceedings

From time to time, we may be involved in legal proceedings or subject to claims incident to the ordinary course of business. Regardless of the outcome, such proceedings or claims can have an adverse impact on our business resulting from defense and settlement costs, diversion of resources and other factors. There can be no assurances that favorable outcomes will be obtained.

Pursuant to a settlement agreement with the DOJ, which has been previously disclosed, we made a single lump-sum remittance to the government in the amount of $0.7 million plus interest in October 2023. The U.S. Attorney’s Office dismissed the “covered conduct” elements in the qui tam with prejudice, while non-covered conduct was dismissed without prejudice. The DOJ excused itself from the case in connection with the settlement. Our ability to participate in federally funded healthcare programs was unaffected by the settlement. In November 2023, the complaint was unsealed and served on us. We filed a motion to dismiss the complaint. In February 2024, the relator filed a motion for leave to amend the complaint. We opposed this motion. In March 2025, the court granted our motion to dismiss with prejudice and denied the relator’s motion for leave to amend. On April 14, 2025, the relator filed an appeal with respect to this ruling. On July 15, 2025, the qui tam case was dismissed with prejudice by the presiding judge. Both the DOJ and the relator’s counsel filed a stipulation of dismissal in the matter.