X0407 4 2023-04-13 0 0001260990 Oncternal Therapeutics, Inc. ONCT 0001269341 VINCENT RICHARD G 12230 EL CAMINO REAL, SUITE 230 SAN DIEGO CA 92130 0 1 0 0 Chief Financial Officer 0 Common Stock 2023-04-13 4 P 0 30000 0.2987 A 156859 D Common Stock 4526 I By Family Trust Common Stock 1834 I By Child The reported price is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $0.2975 to $0.3000. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the SEC Staff, upon request, full information regarding the number of shares purchased at each price within the range set forth above. /s/Chase C. Leavitt, Attorney-in-fact 2023-04-14