X0306 4 2023-01-06 0 0001564824 Allakos Inc. ALLK 0001398311 Radford Harlan Baird 825 INDUSTRIAL ROAD, SUITE 500 SAN CARLOS CA 94070 0 1 0 0 Chief Financial Officer Common Stock 2023-01-06 4 A 0 126640 0.00 A 398901 D Stock Option (Right to buy) 7.20 2023-01-06 4 A 0 194144 0.00 A 2033-01-06 Common Stock 194144 194144 D Mr. Radford was awarded 126,640 restricted stock units ("RSUs") pursuant to the Company's 2018 Equity Incentive Plan on January 6, 2023, of which, 25% will vest on March 1, 2024, and the remainder of the RSUs will vest in 12 equal installments on each three month anniversary thereafter, subject to the Reporting Person continuing as a service provider through each such date. Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The option was granted on January 6, 2023. The option vests as to one-fourth of the shares on January 6, 2024, and one forty-eighth of the shares subject to the option vest each month thereafter, subject to the Reporting Person continuing as a service provider through each such date. /s/ H. Baird Radford 2023-01-09