Form 4 Filing for Annexon, Inc. - Officer/Director Stock Option Grant

This filing details a Form 4 filed by William D. Waddill, a director of Annexon, Inc. (ANNX). On June 11, 2026, Mr. Waddill was granted a stock option to acquire 65,000 shares of Common Stock at an exercise price of $4.70 per share. The option is exercisable after a vesting period, which completes on the earlier of the first anniversary of the grant date or the next Annual Meeting, provided Mr. Waddill remains in continuous service as a director. The option has an expiration date of June 11, 2036. This transaction is classified as an acquisition of stock options by a director.