X0306 4/A 2019-09-12 2019-09-16 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 Option 5.76 2019-09-12 4 A 0 40000 0.00 A 2029-09-12 Common Stock 40000 40000 D The original Form 4 reported the acquisition of the Stock Options in the "D" column of Column 5. This amendment is being filed to correctly report the acquisition of the Stock Options in the "A" column of Column 5. One thirty-sixth of each Effective Date Award and each Initial Award shall vest and become exercisable in substantially equal installments on each monthly anniversary of the date of grant, so that the options subject to each such type of award shall be fully vested on the three-year anniversary of the date of grant, subject to the Reporting Persons continued service on the Board through each such vesting date. /s/ Hazel M. Aker, Attorney-in-fact 2020-07-31