First Financial Bankshares (FFIN) Risk Factors

The processes we use to estimate our allowance for credit losses and to measure the fair value of financial instruments, as well as the processes used to estimate the effects of changing interest rates depends upon the use of analytical and forecasting models, including various inputs and assumptions (collectively, the "models"). In addition, these models are used to calculate the fair value of our assets and liabilities when we acquire other financial institutions. These models reflect assumptions that may not be accurate, particularly in times of market stress or other unforeseen circumstances. Even if these assumptions are adequate, the models may prove to be inadequate or inaccurate because of other flaws in their design or their implementation. If the models we use for interest rate risk and asset-liability management are inadequate, we may incur increased or unexpected losses upon changes in market interest rates or other market measures. If the models we use for determining our current expected credit losses are inadequate, the allowance for credit losses may not be sufficient to support future charge-offs. If the models we use to measure the fair value of financial instruments is inadequate, the fair value of such financial instruments may fluctuate unexpectedly or may not accurately reflect what we could realize upon sale or settlement of such financial instruments. Such failure in our analytical or forecasting models could have a material adverse effect on our business, financial condition and results of operations.

As of December 31, 2023, we had $314.62 million of goodwill and other intangible assets. A significant decline in our financial condition, a significant adverse change in the business climate, slower growth rates or a significant and sustained decline in the price of our common stock may necessitate taking charges in the future related to the impairment of our goodwill and other intangible assets. If we were to conclude that a future write-down of goodwill and other intangible assets is necessary, we would record the appropriate charge, which could have a material adverse effect on our financial condition and results of operations.

First Financial Bankshares, Inc. is a separate and distinct legal entity from its subsidiaries. It receives substantially all of its revenue from dividends paid by its subsidiaries. These dividends are the principal source of funds to pay dividends on the Company's common stock to shareholders and interest and principal on First Financial Bankshares, Inc. debt (to the extent we have balances outstanding). Various federal and/or state laws and regulations limit the amount of dividends that our bank and trust subsidiaries may pay to First Financial Bankshares, Inc. In the event our subsidiaries are unable to pay dividends to First Financial Bankshares, Inc., the Company may not be able to service debt, if any,or pay dividends on the Company's common stock. The inability to receive dividends from our subsidiaries could have a material adverse effect on the Company's business, financial condition, results of operations and liquidity.

Our trust company subsidiary derives its revenues primarily from investment management fees based on assets under management. Our ability to maintain or increase assets under management is subject to a number of factors, including investors' perception of our past performance, in either relative or absolute terms, market and economic conditions, including changes in oil and gas prices, and competition from investment management companies. Financial markets are affected by many factors, all of which are beyond our control, including general economic conditions, changes in oil and gas prices; securities market conditions; the level and volatility of interest rates and equity prices; competitive conditions; liquidity of global markets; international and regional political conditions; regulatory and legislative developments; monetary and fiscal policy; investor sentiment; availability and cost of capital; technological changes and events; outcome of legal proceedings; changes in currency values; inflation; credit ratings; and the size, volume and timing of transactions. A decline in the fair value of the assets under management, caused by a decline in general economic conditions, would decrease our wealth management fee income. Investment performance is one of the most important factors in retaining existing clients and competing for new wealth management clients. Poor investment performance could reduce our revenues and impair our growth in the following ways: - existing clients may withdraw funds from our wealth management business in favor of better performing products;- asset-based management fees could decline from a decrease in assets under management;- our ability to attract funds from existing and new clients might diminish; and - our wealth managers and investment advisors may depart to join a competitor or otherwise. Even when market conditions are generally favorable, our investment performance may be adversely affected by the investment style of our wealth management and investment advisors and the particular investments that they make. To the extent our future investment performance is perceived to be poor in either relative or absolute terms, the revenues and profitability of our wealth management business will likely be reduced and our ability to attract new clients will likely be impaired. As such, fluctuations in the equity and debt markets can have a direct impact upon our net earnings. In addition, as approximately 15% of trust fees came from management of oil and gas properties in 2023, a decline in the prices of oil and gas could lead to a loss of material amounts of our trust income.

Certain of our investment advisory and wealth management clients can terminate, with little or no notice, their relationships with us, reduce their aggregate assets under management, or shift their funds to other types of accounts with different rate structures for any number of reasons, including investment performance, changes in prevailing interest rates, inflation, changes in investment preferences of clients, changes in our reputation in the marketplace, change in management or control of clients, loss of key investment management personnel and financial market performance. We cannot be certain that our trust company subsidiary will be able to retain all of its clients. If its clients terminate their investment advisory and wealth management contracts, our trust company subsidiary, and consequently we, could lose a substantial portion of our revenues.

Our profitability is dependent to a large extent on our net interest income, which is the difference between interest income we earn as a result of interest paid to us on loans and investments and interest we pay to third-parties such as our depositors and those from which we borrow funds. Like most financial institutions, we are highly sensitive to many factors that are beyond our control, including general economic conditions and policies of various governmental and regulatory agencies and, in particular, the Federal Reserve Board. Changes in monetary policy, including changes in interest rates, could influence not only the interest we receive on loans and securities and the amount of interest we pay on deposits and borrowings, but such changes could also affect (i) our ability to originate loans and obtain deposits, (ii) the fair value of our financial assets and liabilities, (iii) the average duration of our securities portfolio, and (iv) the slope of the overall yield curve and its impact on the value of the investment portfolio and reinvestment income. If the interest rates paid on deposits and other borrowings increase at a faster rate than the interest rates received on loans and investments, our net interest income, and earnings, could be adversely affected. Earnings could also be adversely affected if the interest rates received on loans and investments fall more quickly than the interest rates paid on deposits and other borrowings. The Federal Reserve Board increased rates 200 basis points through mid-2019 and as a response to the ongoing COVID pandemic decreased rates 75 basis points during the third and fourth quarters of 2019 and then an additional 150 basis points in the first quarter of 2020, resulting in a target rate range of zero to 25 basis points throughout the remainder of 2020 and 2021. The Federal Reserve Board began increasing interest rates by raising rates 25 basis points in March 2022, 50 basis points in May 2022, and 75 basis points in June, July, September and November 2022, respectively, 50 basis points in December 2022, and 25 basis points in February, March, May, and July 2023, respectively, resulting in a target rate range of 5.25% to 5.50% at December 31, 2023. Today, there continues to be uncertainty regarding future interest rates. Increases in interest rates can have negative impacts on our business, including reducing our customers' desire to borrow money from us or adversely affecting their ability to repay their outstanding loans by increasing their debt obligations through the periodic reset of adjustable interest rate loans. If our borrowers' ability to pay their loans is impaired by increasing interest payment obligations, our level of non-performing assets would increase, producing an adverse effect on operating results. Asset values, especially commercial real estate as collateral, securities or other fixed rate earning assets, can decline significantly with relatively minor changes in interest rates. Conversely, decreases in interest rates can affect the amount of interest we earn on our loans and investment securities, which could have a material adverse effect on the Company's financial condition and results of operations. Although we have implemented strategies that we believe reduce the potential effects of adverse changes in interest rates on our results of operations, these strategies may not always be successful. Any of these events could adversely affect our results of operations, financial condition and liquidity. Credit Risk

As a lender, we are exposed to the risk that our borrowers may not repay their loans according to the terms of these loans and the collateral securing the payment of these loans may be inadequately documented or may be insufficient to fully compensate us for the outstanding balance of the loan plus the costs to dispose of the collateral. We may experience significant loan losses, which could have a material adverse effect on our operating results and financial condition. Management makes various assumptions and judgments about the collectability of our loan portfolio, including the diversification by industry of our commercial loan portfolio, the amount of nonperforming loans and related collateral, the volume, growth and composition of our loan portfolio, the effects on the loan portfolio of current economic indicators and their probable impact on borrowers and the evaluation of our loan portfolio through our internal loan review process and other relevant factors. We maintain an allowance for credit losses, which is an allowance established through a provision for credit losses charged to expense that represents management's best estimate of probable losses inherent in our loan portfolio. Additional credit losses will occur in the future and may occur at a rate greater than we have experienced to date. In determining the amount of the allowance, we rely on an analysis of our loan portfolio, our experience and our evaluation of general economic conditions. If our assumptions prove to be incorrect, our current allowance may not be sufficient and adjustments may be necessary to allow for different economic conditions or adverse developments in our loan portfolio. Material additions to the allowance could materially decrease our net income. In addition, banking regulators periodically review our allowance for credit losses and may require us to increase our provision for credit losses or recognize further charge-offs, based on judgments different than those of our management. Any increase in our allowance for credit losses or charge-offs as required by these regulatory agencies could have a material negative effect on our operating results and financial condition.

The market value of real estate, particularly real estate held-for-investment ("HFI"), can fluctuate significantly in a short period of time as a result of market conditions in the geographic area in which the real estate is located. If the value of the real estate serving as collateral for our loan portfolio were to decline materially, a significant part of our loan portfolio could become under-collateralized. If the loans that are collateralized by real estate become troubled during a time when market conditions are declining or have declined, then, in the event of foreclosure, we may not be able to realize the amount of collateral that we anticipated at the time of originating the loan. This could have a material adverse effect on our provision for credit losses and our operating results and financial condition. Liquidity Risk

The Company requires liquidity to meet our deposit and other obligations as they come due. The Company's access to funding sources in amounts adequate to finance its activities or on reasonable terms could be impaired by factors that affect it specifically or the financial services industry or the general economy. Factors that could reduce its access to liquidity sources include a downturn in the Texas market, difficult credit markets, depreciation in investment security values, or adverse regulatory actions against the Company. The Company's access to deposits may also be affected by the liquidity needs of its depositors. In particular, a substantial majority of the Company's liabilities are demand, savings, interest checking and money market deposits, which are payable on demand or upon several days' notice, while by comparison, a substantial portion of its assets are loans, which cannot be called or sold in the same time frame. The Company may not be able to replace maturing deposits and advances as necessary in the future, especially if a large number of its depositors sought to withdraw their accounts, regardless of the reason. On March 9, 2023, Silvergate Bank, La Jolla, California, announced its decision to voluntarily liquidate its assets and wind down operations. On March 10, 2023, Silicon Valley Bank, Santa Clara, California, was closed by the California Department of Financial Protection and Innovation (the "DFPI"), on March 12, 2023, Signature Bank, New York, New York, was closed by the New York State Department of Financial Services and on May 1, 2023, First Republic Bank, San Francisco, California, was closed by the DFPI, and in each case the FDIC was appointed receiver for the failed institution. These banks had elevated levels of uninsured deposits, which may be less likely to remain at the bank over time and less stable as a source of funding than insured deposits. These failures led to volatility and declines in the market for bank stocks and questions about depositor confidence in depository institutions. These events have led to a greater focus by institutions, investors and regulators on the on-balance sheet liquidity of and funding sources for financial institutions, the composition of their deposits, including the amount of uninsured deposits, the amount of accumulated other comprehensive loss, capital levels and interest rate risk management. If we are unable to adequately manage our liquidity, we may experience a material adverse effect on our financial condition and results of operations. We must maintain sufficient funds to respond to the needs of depositors and borrowers. Deposits have traditionally been our primary source of funds for use in lending and investment activities. We also receive funds from loan repayments, investment maturities and income on other interest-earning assets. While we emphasize the generation of low-cost core deposits as a source of funding, there is strong competition for such deposits in our market area. Additionally, deposit balances can decrease if customers perceive alternative investments as providing a better risk/return tradeoff. Accordingly, as a part of our liquidity management, we must use a number of funding sources in addition to deposits and repayments and maturities of loans and investments, which may include Federal Home Loan Bank of Dallas advances, federal funds purchased and brokered certificates of deposit. Adverse operating results or changes in industry conditions could lead to difficulty or an inability to access these additional funding sources. Any decline in available funding could adversely impact our ability to originate loans, invest in securities, pay our expenses, or fulfill obligations such as repaying our borrowings or meeting deposit withdrawal demands, any of which could have a material adverse impact on our liquidity, business, financial condition and results of operations. A lack of liquidity could also attract increased regulatory scrutiny and potential restraints imposed on us by regulators. Depending on the capitalization status and regulatory treatment of depository institutions, including whether an institution is subject to a supervisory prompt corrective action directive, certain additional regulatory restrictions and prohibitions may apply, including restrictions on growth, restrictions on interest rates paid on deposits, restrictions or prohibitions on payment of dividends and restrictions on the acceptance of brokered deposits. Our financial flexibility would be severely constrained if we were unable to maintain our access to funding or if adequate financing were not available at acceptable interest rates. Further, if we were required to rely more heavily on more expensive funding sources to support liquidity, our revenues may not increase proportionately to cover our increased costs. In this case, our operating margins and profitability would be adversely affected. If alternative funding sources were no longer available to us, we may need to sell a portion of our investment and/or loan portfolio to raise funds, which, depending upon market conditions, could result in us realizing a loss on the sale of such assets. As of December 31, 2023, we had a net unrealized loss of $403.30 million on our available for-sale investment securities portfolio as a result of the rising interest rate environment. Our investment securities totaled $4.73 billion, or 36.11% of total assets, at December 31, 2023. The details of this portfolio are included in Note 2 to the consolidated financial statements. Operational Risk

We intend to continue our current growth strategy, including opening new branches and acquiring other banks. The market for acquisitions remains highly competitive, and we may be unable to find satisfactory acquisition candidates in the future that fit our acquisition and growth strategy. To the extent that we are unable to find suitable acquisition candidates, an important component of our growth strategy may be lost. Additionally, our completed acquisitions, or any future acquisitions, may not produce the revenue, earnings or synergies that we anticipated.

The Federal Reserve Board adopted a final rule that implemented the Basel III Rule changes to the international regulatory capital framework and revised the U.S. risk-based and leverage capital requirements for U.S. banking organizations to strengthen identified areas of weakness in capital rules and to address relevant provisions of the Dodd-Frank Act. The final rule established a stricter regulatory capital framework that requires banking organizations to hold more and higher-quality capital to act as a financial cushion to absorb losses and help banking organizations better withstand periods of financial stress. The final rule increased capital ratios for all banking organizations and introduced a "capital conservation buffer" which is in addition to each capital ratio. If a banking organization dips into its capital conservation buffer, it may be restricted in its ability to pay dividends and discretionary bonus payments to its executive officers. The final rule assigned a higher risk weight to loans that are more than 90 days past due or are on nonaccrual status and to certain commercial real estate facilities that finance the acquisition, development or construction of real property. The final rule also required unrealized gains and losses on certain available-for-sale ("AFS") securities holdings to be included for purposes of calculating regulatory capital requirements unless a one-time opt-out is exercised. We exercised this opt-out right in our March 31, 2015 quarterly financial filing. The final rule also included changes in what constitutes regulatory capital. In addition, Tier 2 capital is no longer limited to the amount of Tier 1 capital included in total capital. Mortgage servicing rights, certain deferred tax assets and investments in unconsolidated subsidiaries over designated percentages of common stock are required to be deducted from capital. The final rule became effective for us on January 1, 2015. As of December 31, 2023, we met all of these new requirements, including the full capital conservation buffer. Although we currently cannot predict the specific impact and long-term effects that Basel III will have on our Company and the banking industry more generally, the Company may be required to maintain higher regulatory capital levels through the capital conservation buffer which could impact our operations, net income and ability to grow. Furthermore, the Company's failure to comply with the minimum capital requirements could result in our regulators taking formal or informal actions against us which could restrict our future growth or operations. For example, climate change advocates might not be able to force a regulatory ban on lending to certain industries, but the regulators could increase risk weighting on oil and gas loans.

We may need to raise additional capital in the future to provide us with sufficient capital resources to meet our commitments and business needs, particularly if our asset quality or earnings were to deteriorate significantly. Our ability to raise additional capital, if needed, will depend on, among other things, conditions in the capital and financial markets at that time, which are outside of our control, and our financial performance. Economic conditions and the loss of confidence in financial institutions may increase our cost of funding and limit access to certain customary sources of capital, other financial institution borrowings and borrowings from the discount window of the Federal Reserve Board. Any occurrence that may limit our access to the capital markets, such as a decline in the confidence of other financial institutions, or counterparties participating in the capital markets, may adversely affect our costs and our ability to raise capital. An inability to raise additional capital on acceptable terms when needed could have a materially adverse effect on our financial condition and results of operations.