X0306 4 2017-12-14 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 278002 I By Partnership Common Stock 389143 I By Trust Common Stock 2017-12-14 4 J 0 0 0.00 D 224155 I By LLC Represents shares owned by a family limited partnership of which Mr. Dueser is the manager of the limited liability company, which serves as general partner. 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. The total shares represented are held in various trusts of which Mr. Dueser is the trustee, settlor and beneficiary. On December 15, 2017, Mr. Dueser gifted partnership interests (in the form of units) to three trusts: Trust I, Trust II and Trust III (together, the "Trusts") of which he is not the beneficiary. Although Mr. Dueser gifted partnership interests to the Trusts, the number of shares beneficially owned by the partnership remains unchanged. The gifting of the partnership interests, however, decreased Mr. Dueser's pecuniary interests in the shares held by the partnership due to the decrease in his overall interests in the partnership. Accordingly, while the gifting of the partnership interests to the Trusts constitutes a disposition by Mr. Dueser, the amount and price of the shares involved in the disposition are not applicable. Represents shares owned by a limited liability company ("LLC") of which Mr. Dueser is the manager and sole member, which serves as the general partner of a limited partnership referred to in footnote 3 above. By: J. Bruce Hildebrand Attorney in fact for F. Scott Dueser 2017-12-14