X0306 4 2017-08-14 0 0000036029 FIRST FINANCIAL BANKSHARES INC FFIN 0001243211 DUESER F SCOTT P. O. BOX 701 ABILENE TX 79604-0701 1 1 0 0 Chairman, President and CEO Common Stock 2017-08-14 4 P 0 168 41.40 A 385586 I By Trust Common Stock 2017-08-14 4 P 0 307 41.45 A 385893 I By Trust Common Stock 278002 I By Partnership Common Stock 224155 I By LLC The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary. Represents shares owned by a partnership of which Mr. Dueser is the manager. Mr. Dueser disclaims beneficial ownership with respect to 208,502 shares because he does not have a pecuniary interest in such shares. This report should not be deemed an admission that Mr. Dueser is the beneficial ownership of these shares for purposes of Section 16 or any other purpose. Represents shares owned by a limited liability company ("LLC") of which Mr. Dueser is the manager and sole member. By: J. Bruce Hildebrand Attorney in Fact for F. Scott Dueser 2017-08-14