X0306 4 2019-06-06 0 0001564824 Allakos Inc. ALLK 0001198325 JANNEY DANIEL C/O ALLAKOS INC. 975 ISLAND DRIVE, SUITE 201 REDWOOD CITY CA 94065 1 0 0 0 Stock Option (Right to Buy) 40.00 2019-06-06 4 A 0 16000 0.00 A 2029-06-06 Common Stock 16000 16000 D 100% of the shares subject to the option shall vest upon the earlier of (i) the one-year anniversary of the date of grant of the annual option or (ii) the date of the next annual meeting of stockholders that occurs following the grant of such annual option, in each case, provided that the Reporting Person continues to serve as a non-employee director through the applicable vesting date. /s/ Jeff Macfarland, by power of attorney 2019-06-11