Timothy E. Sullivan's Stock Option Exercise and Sale

Timothy E. Sullivan, an officer of Apellis Pharmaceuticals, Inc., has exercised stock options and plans to sell shares. The options were granted on 10/18/2017 and exercised on 10/21/2025, involving 10,000 common shares. The sale is expected to occur on 10/21/2025, with an aggregate market value of $280,300. Additionally, Sullivan sold 32,729 common shares on 09/08/2025, generating gross proceeds of $911,829.94. The transactions are part of a pre-arranged trading plan adopted on 06/09/2025.