X0306 4 2020-07-22 0 0001458412 CROSSFIRST BANKSHARES, INC. CFB 0001778478 O'Toole David L. 11440 TOMAHAWK CREEK PARKWAY LEAWOOD KS 66211 0 1 0 0 CPO & Chief Investment Officer Common Stock 2020-07-22 4 S 0 500 9.96 D 36331 D Common Stock 163739 I See footnote This transaction was made pursuant to a Rule 10b5-1 trading plan. 159,489 shares are held by the David L. O'Toole Revocable Trust Dated July 17, 2015 with respect to which shares Mr. O'Toole is primary trustee and with respect to which Mr. O'Toole has sole voting and investment power with respect to such shares. 4,250 shares are held by the Lisa A. O'Toole Revocable Trust Dated July 17, 2015 with Ms. O'Toole as the primary trustee and to which Mr. O'Toole is a beneficiary. /s/ Aisha Reynolds, Attorney-in-Fact for David O'Toole 2020-07-24