X0306 4 2020-06-11 0 0001260990 Oncternal Therapeutics, Inc. ONCT 0001024004 HALE DAVID F 12230 EL CAMINO REAL, SUITE 300 SAN DIEGO CA 92130 1 0 0 0 Stock Options 2.94 2020-06-11 4 A 0 22500 0.00 D 2029-06-10 Common Stock 22500 22500 D One-twelfth of the number of shares subject to the option vest and become exercisable in substantially equal installments on each monthly anniversary of the grant date, subject to the Reporting Person's continued service on the board of directors of the Issuer through such vesting date. /s/Hazel M. Aker, Attorney-in-fact 2020-06-12