X0306 4 2022-03-07 0 0001499453 Spirit of Texas Bancshares, Inc. STXB 0001738217 Patel Akash J. 1836 SPIRIT OF TEXAS WAY CONROE TX 77301 1 0 0 0 Common Stock 2022-03-07 4 M 0 5000 15 A 193801 D Common Stock 2022-03-07 4 M 0 3000 21 A 196801 D Common Stock 2022-03-07 4 M 0 2500 13 A 199301 D Common Stock 2022-03-07 4 M 0 3750 13 A 203051 D Common Stock 2022-03-07 4 M 0 5000 16 A 208051 D Common Stock 2022-03-07 4 M 0 5000 13 A 213051 D Stock Options (right to buy) 15 2022-03-07 4 M 0 5000 0 D 2022-02-23 2027-02-23 Common Stock 5000 0 D Stock Options (right to buy) 21 2022-03-07 4 M 0 3000 0 D 2022-02-25 2028-05-03 Common Stock 3000 0 D Stock Options (right to buy) 13 2022-03-07 4 M 0 2500 0 D 2018-05-23 2023-05-23 Common Stock 2500 0 D Stock Options (right to buy) 13 2022-03-07 4 M 0 3750 0 D 2019-05-22 2024-05-22 Common Stock 3750 0 D Stock Options (right to buy) 16 2022-03-07 4 M 0 5000 0 D 2020-05-21 2025-05-21 Common Stock 5000 0 D Stock Options (right to buy) 13 2022-03-07 4 M 0 5000 0 D 2021-05-26 2026-05-26 Common Stock 5000 0 D Includes 1,000 restricted stock units ("RSUs"), which will vest in five equal annual installments beginning on 02/10/2023, includes 1,500 RSUs, which will vest in five equal annual installments beginning on 04/01/2022, 1,000 RSUs, which began vesting in five equal annual installments on 07/01/2021, and 1,000 RSUs, which began vesting in five equal annual installments on 05/23/2020. /s/ By Michael L. Durham as Attorney-in-Fact for Akash J. Patel 2022-03-09