SCHEDULE 13G/A

EXAGEN INC

Common Stock, par value $0.001 per share · CUSIP: 30068X103

Event date: 2025-03-25

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• NMSIC Co-Investment Fund, L.P.

  Shares: 1,758,958 · Class: 9.83%

• Sun Mountain Capital Partners, L.L.C.

  Shares: 1,758,958 · Class: 9.83%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.