X0508 4 2025-03-05 0001564824 Allakos Inc. ALLK 0001637219 Tomasi Adam 825 INDUSTRIAL ROAD, SUITE 500 SAN CARLOS CA 94070 false true false false President false Common Stock 2025-03-05 4 F false 20017 0.26 D 512630 D Common Stock 20790 I See footnote Shares sold to satisfy the tax withholding obligations by the Reporting Person in connection with the vesting of RSUs. The shares are held by Mr. Tomasi and Carrie Tomasi, as Trustees of the Tomasi Living Trust dated July 14, 2017. /s/ H. Baird Radford, III, by power of attorney 2025-03-07