X0508 4 2024-01-01 0 0001761918 Erasca, Inc. ERAS 0001652037 Start Valerie Denise Harding C/O ERASCA, INC. 3115 MERRYFIELD ROW, SUITE 300 SAN DIEGO CA 92121 1 0 0 0 0 Stock Option (right to buy) 2.13 2024-01-01 4 A 0 39590 0.00 A 2034-01-01 Common Stock 39590 39590 D The option will vest and become exercisable in monthly, cumulative 1/12th increments beginning one month from the date of grant, subject to such person's continuing in service on the board through the applicable vesting date. At the election of the filing person, the option grant was issued in lieu of direct cash compensation payable to such person in 2024 in connection with each position on the board and its committees for which such person is anticipated to serve in 2024. /s/ Ebun Garner, attorney-in-fact 2024-01-03