☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF 1934 For the quarterly period ended June 30, 2026 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF 1934 For the transition period fromtoCommission file number 0-07674 First Financial Bankshares, Inc. (Exact name of registrant as specified in its charter) Texas(State or other jurisdiction ofincorporation or organization) 400 Pine Street, Abilene, Texas(Address of principal executive offices) (325) 627-7155(Registrant’s telephone number, including area code)Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities ExchangeAct of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has beensubject to such filing requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule 405 of Regulation S-T(§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was requiredto submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reportingcompany or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and“emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☒Non-accelerated filer☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act).Yes☐No☒ TABLE OF CONTENTS PART I - FINANCIAL INFORMATION Item1.Financial Statements - UnauditedConsolidated Balance SheetsConsolidated Statements of EarningsConsolidated Statements of Comprehensive Earnings (Loss)Consolidated Statements of Shareholders’ EquityConsolidated Statements of Cash FlowsNotes to Consolidated Financial Statements2.Management’s Discussion and Analysis of Financial Condition and Results of Operations3.Quantitative and Qualitative Disclosures About Market Risk4.Controls and ProceduresPART II - OTHER INFORMATION1.Legal Proceedings1A.Risk Factors2.Unregistered Sales of Equity Securities and Use of Proceeds3.Defaults Upon Senior Securities4.Mine Safety Disclosures5.Other Information6.ExhibitsSignatures PART I - FINANCIAL INFORMATION Item 1. Financial Statements. 3The consolidated balance sheets of First Financial Bankshares, Inc. and Subsidiaries (the “Company” or “we”) at June 30, 2026 (unaudited), andDecember 31, 2025, and the consolidated statements of earnings, comprehensive earnings (loss) and shareholders’ equity for the three and six-months ended June 30, 2026 and 2025 (unaudited), and the consolidated statements of cash flows for the six-months ended June 30, 2026 and2025 (unaudited), and notes to consolidated financial statements (unaudited), follow on pages 4 through 30. FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS) —(UNAUDITED)(Dollars in thousands) FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY—(UNAUDITED)(Dollars in thousands, except per share amounts) FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY—(UNAUDITED)(Dollars in thousands, except per share amounts) FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIESCONSOLIDATED STATEMENTS OF CASH FLOWS—(UNAUDITED)(Dollars in thousands) FIRST FINANCIAL BANKSHARES, INC. AND SUBSIDIARIESNOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) Note 1 – Summary of Significant Accounting Policies Nature of Operations First Financial Bankshares, Inc., a Texas corporation (“Bankshares,” “Company,” “we” or “us”), is a financial holding company which owns all ofthe capital stock of First Financial Bank, which had 79 locations located in Texas as of June 30, 2026. The Company’s primary source of revenueis providing loans and banking services to consumers and commercial customers in the market area in which First Financial Bank is located. Inaddition, the Company also owns First Financial Trust & Asset Management Company dba First Financial Wealth Management, First FinancialInsurance Agency, Inc. (inactive), First Technology Services, Inc., FFB Investment Paris Fund, LLC, and FFB Portfolio Management, Inc. Basis of Presentation The unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the