X0508 4 2024-01-03 0 0001260990 Oncternal Therapeutics, Inc. ONCT 0001244823 BREITMEYER JAMES B 12230 EL CAMINO REAL, SUITE 230 SAN DIEGO CA 92130 1 1 0 0 Chief Executive Officer 0 Common Stock 2024-01-03 4 F 0 50955 0.4961 D 443034 D Common Stock 2024-01-03 4 F 0 4485 0.4961 D 15426 I By Spouse Common Stock 196544 I By Family Trust Common Stock 733 I By Child Shares withheld by the Issuer to satisfy statutory tax withholding requirements on vesting of restricted stock units. /s/Chase C. Leavitt, Attorney-in-fact 2024-01-05