X0306 4 2019-12-03 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 2019-12-03 5 G 0 E 29986 0.00 D 818751 I By Trust Common Stock 2019-12-03 5 G 0 E 1399 0.00 D 817452 I By Trust Common Stock 556004 I By Partnership Common Stock 448310 I By Partnership The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary. Represents shares that are owned by a family limited partnership of which Mr. Dueser serves as manager of the general partner and to which he disclaims beneficial ownership with respect to 417,004 shares. This report should not be deemed an admission that Mr. Dueser is the beneficial owner of these shares for purposes of Section 16 or any other purpose. Represents shares that are owned by a family limited partnership of which Mr. Dueser serves as manager of the general partner and to which he disclaims beneficial ownership with respect to 319,646 shares. This report should not be deemed an admission that Mr. Dueser is the beneficial owner of these shares for purposes of Section 16 or any other purpose. By: J. Bruce Hildebrand Attorney in Fact for F. Scott Dueser 2019-12-03