National Bank : Q2 2023 Investor Presentation

This presentation contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements contain words such as "anticipate," "believe," "can," "would," "should," "could," "may," "predict," "seek," "potential," "will," "estimate," "target," "plan," "project," "continuing," "ongoing," "expect," "intend" or similar expressions that relate to the Company's strategy, plans or intentions. Forward-looking statements involve certain important risks, uncertainties and other factors, any of which could cause actual results to differ materially from those in such statements. Such factors include, without limitation, the "Risk Factors" referenced in our most recent Form 10-K filed with the Securities and Exchange Commission (SEC), other risks and uncertainties listed from time to time in our reports and documents filed with the SEC, and the following factors: difficulties in integrating the NBHC, Community Bancorporation, Bancshares of Jackson Hole Incorporated, or Cambr Solutions, LLC businesses or fully realizing cost savings and other benefits; business disruption following the mergers; ability to execute our business strategy (including our digital strategy); business and economic conditions; effects of any potential government shutdowns; economic, market, operational, liquidity, credit and interest rate risks associated with the Company's business; effects of any changes in trade, monetary and fiscal policies and laws; changes imposed by regulatory agencies to increase capital standards; effects of inflation, as well as, interest rate, securities market and monetary supply fluctuations; changes in the economy or supply-demand imbalances affecting local real estate values; changes in consumer spending, borrowings and savings habits; with respect to our mortgage business, the inability to negotiate fees with investors for the purchase of our loans or our obligation to indemnify purchasers or repurchase related loans; the Company's ability to identify potential candidates for, consummate, integrate and realize operating efficiencies from, acquisitions, consolidations and other expansion opportunities; the Company's ability to realize anticipated benefits from enhancements or updates to its core operating systems from time to time without significant change in client service or risk to the Company's control environment; the Company's dependence on information technology and telecommunications systems of third-

party service providers and the risk of systems failures, interruptions or breaches of security; the Company's ability to achieve organic loan and deposit growth and the composition of such growth; changes in sources and uses of funds; increased competition in the financial services industry; the effect of changes in accounting policies and practices; the share price of the Company's stock; the Company's ability to realize deferred tax assets or the need for a valuation allowance; the effects of tax legislation, including the potential of future increases to prevailing tax rules, or challenges to our positions; continued consolidation in the financial services industry; ability to maintain or increase market share and control expenses; costs and effects of changes in laws and regulations and of other legal and regulatory developments; technological changes; the timely development and acceptance of new products and services, including in the digital technology space our digital solution 2UniFi; the Company's continued ability to attract, hire and maintain qualified personnel; ability to implement and/or improve operational management and other internal risk controls and processes and reporting system and procedures; regulatory limitations on dividends from our bank subsidiaries; changes in estimates of future credit reserve requirements based upon the periodic review thereof under relevant regulatory and accounting requirements; financial, reputational, or strategic risks associated with our investments in financial technology companies and initiatives; widespread natural and other disasters, pandemics, dislocations, political instability, acts of war or terrorist activities, cyberattacks or international hostilities; a cybersecurity incident, data breach or a failure of a key information technology system; impact of reputational risk; and success at managing the risks involved in the foregoing items. The Company can give no assurance that any goal or plan or expectation set forth in forward-looking statements can be achieved and readers are cautioned not to place undue reliance on such statements. The forward-looking statements are made as of the date of this press release, and the Company does not intend, and assumes no obligation, to update any forward-looking statement to reflect events or circumstances after the date on which the statement is made or to reflect the occurrence of unanticipated events or circumstances, except as required by applicable law.

Certain of the financial measures and ratios we present, including "tangible assets," "return on average tangible assets," "tangible common equity," "return on average tangible common equity," "tangible common book value per share," "tangible common equity to tangible assets," "adjusted non-interest expense," "efficiency ratio adjusted for other intangible asset amortization and acquisition-related expenses," "adjusted net income," "adjusted earnings per share - diluted," "net income adjusted for the impact of other intangible asset amortization expense and acquisition-related expenses, after tax," "adjusted return on average tangible assets," "adjusted return on average tangible common equity," "pre-provision net revenue," "pre-provision net revenue adjusted for acquisition-related expenses," and "fully taxable equivalent" metrics, are supplemental measures that are not required by, nor presented in accordance with, U.S. generally accepted accounting principles (GAAP). We refer to these financial measures and ratios as "non-GAAP financial measures." We consider the use of select non-GAAP financial measures and ratios to be useful for financial and operational decision making and useful in evaluating period-to-period comparisons. We believe that these non-GAAP financial measures provide meaningful supplemental information regarding our performance by excluding certain expenditures or assets that we believe are not indicative of

our primary business operating results or by presenting certain metrics on a fully taxable equivalent basis. We believe that management and investors benefit from referring to these non-GAAP financial measures in assessing our performance and when planning, forecasting, analyzing and comparing past, present and future periods. These non-GAAP financial measures should not be considered a substitute for financial information presented in accordance with GAAP and you should not rely on non-GAAP financial measures alone as measures of our performance. The non-GAAP financial measures we present may differ from non-GAAP financial measures used by our peers or other companies. We compensate for these limitations by providing the equivalent GAAP measures whenever we present the non- GAAP financial measures and by including a reconciliation of the impact of the components adjusted for in the non-GAAP financial measure so that both measures and the individual components may be considered when analyzing our performance.

A reconciliation of non-GAAP financial measures to the comparable GAAP financial measures is included in the appendix.

Attractive Markets

38 banking centers

‒Front Range contributed 95% of Colorado's population growth between 2010 and 2020 (1)

‒#2 Best Economy in the

U.S. (U.S. News 2023)

‒#4 on America's Top States for Business (CNBC 2022)

15 banking centers across Utah, New Mexico, and Idaho

2 commercial banking locations in Texas

‒Utah: #1 in Top Housing Markets Ranking (Realtor.com 2021)

‒Utah: #1 Best Economy in the U.S. (U.S. News 2023)

‒Utah: #8 on America's Top States for Business (CNBC 2022)

‒Texas: #9 Best Economy in the U.S. (U.S. News 2023)

34 banking centers

9 banking centers(3)

‒Wyoming: #1 in State Business Tax Climate Index (Tax Foundation 2023)

‒Wyoming: #1 Tax Friendly state for middle income families (Kiplinger 2022)

(1)As of June 30, 2023. Includes one banking center shared by NBH Bank and BOJH Trust.

(2)Represents a non-GAAP financial measure. See Appendix for a reconciliation of these measures.

(3)Annualized

(4)Excluding other intangible asset amortization

(1)Colorado State Demography Office - "Colorado's 2020 Population & Economic Overview"

(2)Ranking based on aggregate population growth for 2019-2024

(3)Includes one banking center shared by NBH Bank and BOJH Trust