Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the use of our report dated March 26, 2024, with respect to the consolidated financial statements of Annexon, Inc., incorporated herein by reference, and to the reference to our firm under the heading “Experts” in the base prospectus and the sales agreement prospectus.
/s/ KPMG LLP
San Francisco, California
March 26, 2024
