Earnings release
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FirstSun Capital Bancorp Reports Third Quarter 2026 Results Third Quarter 2026 Highlights: • Net interest margin of 3.82% • 21.9% noninterest income to total revenue • Net income of $38.4 million, $0.82 per diluted share (adjusted, $48.2 million, $1.03 per diluted share, see “Non-GAAP Financial Measures and Reconciliations” below) • Return on average total assets of 0.98% (adjusted, 1.23%, see “Non-GAAP Financial Measures and Reconciliations” below) • Return on average stockholders’ equity of 8.23% (adjusted, 10.33%, see “Non-GAAP Financial Measures and Reconciliations” below) • Repurchased 1,245,224 common shares for $49.7 million under our share repurchase program Denver, Colorado – October 26, 2026 – FirstSun Capital Bancorp (“FirstSun”) (NASDAQ: FSUN) reported net income of $38.4 million in the third quarter of 2026 compared to net income of $23.2 million in the third quarter of 2025. Earnings per diluted share were $0.82 in both the third quarter of 2026 and 2025. Adjusted net income, a non-GAAP financial measure, was $48.2 million or $1.03 per diluted share in the third quarter of 2026 compared to $23.4 million or $0.83 per diluted share in the third quarter of 2025. See “Non-GAAP Financial Measures and Reconciliations” below. Neal Arnold, FirstSun’s Chief Executive Officer and President, commented, “Third quarter results reflect our continued progress on our strategic priorities highlighted by an improved net interest margin as a result of continued balance sheet improvements, a strong diversified revenue profile and improved earnings performance, including benefits from operating synergies realized following the acquisition of First Foundation in the second quarter. We believe our relationship-based business model, our presence in some of the stronger economic growth markets in the country and our disciplined focus on a balanced risk profile position us for continued success. “Additionally, in late September, we successfully completed the core system conversion of First Foundation, representing another important milestone in our overall integration plan. I'm extremely proud of our teammates for all the hard work, planning and collaboration in completing the conversion while continuing to serve our great clients throughout the process. We remain focused on continuing to grow our franchise and delivering strong financial results and sustainable long-term value for our stockholders.” Third Quarter 2026 Results Net income totaled $38.4 million, or $0.82 per diluted share, in the third quarter of 2026, compared to a net loss of $22.9 million, or $0.49 per diluted share, in the prior quarter. Adjusted net income, a non-GAAP financial measure, totaled $48.2 million, or $1.03 per diluted share, in the third quarter of 2026, compared to $21.0 million, or $0.45 per diluted share, in the prior quarter. Return on average total assets was 0.98% in the third quarter of 2026, compared to (0.54)% in the prior quarter, and return on average stockholders’ equity was 8.23% in the third quarter of 2026, compared to (4.92)% in the prior quarter. Adjusted return on average total assets and adjusted return on average stockholders’ equity, each a non-GAAP financial measure, were 1.23% and 10.33% respectively in the third quarter of 2026 compared to 0.50% and 4.52%, respectively, in the prior quarter. Total revenue is net interest income plus noninterest income. 1 1
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Net Interest Income and Net Interest Margin Net interest income totaled $140.3 million in the third quarter of 2026, a decrease of $2.9 million compared to the prior quarter. Our net interest margin increased 24 basis points to 3.82% compared to the prior quarter. Average loans, including loans held-for-sale, decreased by $1.0 billion in the third quarter of 2026, compared to the prior quarter, primarily due to the sale of $1.3 billion in loans late in the second quarter of 2026, a component of our merger-related balance sheet repositioning strategy. Loan yield increased by 17 basis points to 6.33% in the third quarter of 2026, compared to the prior quarter, primarily due to the loan sales in the second quarter of 2026, comprised of lower-yielding multifamily and public finance loans acquired from First Foundation, and the rising interest rate environment and its impact on variable rate loans in the loan portfolio. Average investment securities decreased by $0.2 billion in the third quarter of 2026, compared to the prior quarter, primarily due to the sale of $1.4 billion in securities in the second quarter of 2026, a component of our merger-related balance sheet repositioning strategy. Investment securities yield decreased by 28 basis points to 4.52% in the third quarter of 2026, compared to the prior quarter, primarily reflecting lower purchase accounting discount accretion. Average interest-bearing cash and other assets decreased by $229.2 million in the third quarter of 2026, compared to the prior quarter. Interest-bearing cash and other assets yield increased by 29 basis points to 3.49% in the third quarter of 2026, compared to the prior quarter, primarily reflecting an increase in yield on cash on deposit at the Federal Reserve and an increase in dividends received from the Federal Home Loan Bank. Average interest-bearing deposits decreased $1.3 billion in the third quarter of 2026, compared to the prior quarter, primarily due to the reduction of $2.5 billion in deposits in the second quarter of 2026, a component of our merger-related balance sheet repositioning strategy. Total cost of interest-bearing deposits decreased by two basis points to 2.75% in the third quarter of 2026, compared to the prior quarter, due primarily to the disposition of higher-cost certificates of deposit acquired from First Foundation. Asset Quality and Provision for Credit Losses The provision for credit losses totaled $4.4 million in the third quarter of 2026, primarily reflecting specific reserves established for two CRE loans, partially offset by a decrease in the loan portfolio, compared to a provision for credit losses of $40.4 million in the second quarter of 2026. The provision for credit losses in the second quarter of 2026 primarily reflected the downgrades and write-downs of two C&I lending relationships. Net charge-offs totaled $3.3 million, or 0.11% of average loans on an annualized basis, in the third quarter of 2026, primarily related to one C&I lending relationship and one multifamily relationship, both acquired from First Foundation, compared to net charge-offs of $42.4 million or 1.45% of average loans on an annualized basis, in the second quarter of 2026. The allowance for credit losses as a percentage of loans outstanding was 1.52% at September 30, 2026, an increase of two basis points from the prior quarter. The ratio of nonperforming assets to total assets was 1.46% at September 30, 2026, compared to 1.32% at June 30, 2026. Noninterest Income Noninterest income totaled $39.4 million in the third quarter of 2026, a decrease of $1.6 million from the prior quarter. Income from mortgage banking services decreased $3.2 million in the third quarter of 2026 from the prior quarter, primarily due to a decrease in loan originations sold, as well as a decrease in income resulting from changes in MSR fair value, net of hedging. Other noninterest income increased $1.0 million in the third quarter of 2026 compared to the prior quarter, primarily driven by higher swap and loan syndication revenue. The increase in other noninterest income from swap and loan syndication revenue in the third quarter of 2026, was partially offset by the combined impact of a decline in the fair value of investments associated with our deferred compensation plan and lower OREO property losses. Noninterest income as a percentage of total revenue was 21.9% for the third quarter of 2026, a decrease of 0.3% from the prior quarter. Total revenue is net interest income plus noninterest income. 2 2 2
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Noninterest Expense Noninterest expense totaled $126.6 million in the third quarter of 2026, a decrease of $45.2 million from the prior quarter. Merger related expenses decreased $44.3 million in the third quarter of 2026 from the prior quarter. Salary and employee benefits decreased $5.4 million in the third quarter of 2026 from the prior quarter, primarily due to merger-related workforce reductions and a lower expense impact resulting from a decline in the fair value of investments associated with our deferred compensation plan. Other noninterest expense increased $4.5 million in the third quarter of 2026 compared to the prior quarter, primarily driven by higher loan collection expenses. The efficiency ratio in the third quarter of 2026 was 70.43% compared to 93.25% in the prior quarter. The adjusted efficiency ratio, a non- GAAP financial measure, was 63.06% in the third quarter of 2026 compared to 61.99% in the prior quarter. Tax Rate The effective tax rate was 21.2% in the third quarter of 2026, compared to 18.3% in the prior quarter. Loans Loans decreased to $11.5 billion at September 30, 2026, from $11.6 billion at June 30, 2026, reflecting an annualized decline of 3.8%. The decrease was primarily attributable to paydowns in commercial real estate loans, notably multifamily, non-owner occupied, and owner- occupied properties, as well as lower public finance loan balances, partially offset by increased C&I loans. Deposits Deposits were $13.0 billion at September 30, 2026, compared to $13.4 billion at June 30, 2026, a decrease of $0.4 billion in the third quarter of 2026, or 13.2% on an annualized basis, primarily due to a decrease in money market and savings deposits and certificates of deposit, partially offset by an increase in demand and NOW deposits. Average deposits were $13.2 billion for the third quarter of 2026, compared to $14.5 billion for the prior quarter, a decrease of $1.3 billion or 35.0% on an annualized basis, primarily due to a decrease in certificates of deposit, a component of our merger-related balance sheet repositioning strategy. Noninterest-bearing deposit accounts represented 20.6% of total deposits at September 30, 2026 and our loan to deposit ratio was 88.3% at September 30, 2026. The ratio of total uninsured deposits to total deposits was estimated to be 33.2% at September 30, 2026. The ratio of total uninsured and uncollateralized deposits to total deposits was estimated to be 25.8% at September 30, 2026. Capital As of September 30, 2026, FirstSun’s common equity tier 1 risk-based capital ratio was 11.99%, total risk-based capital ratio was 14.29% and tier 1 leverage ratio was 10.33%. Our capital ratios remain strong and exceeded the levels required to be considered well capitalized. Book value per share was $39.75 at September 30, 2026, an increase of $0.46 from June 30, 2026. Tangible book value per share, a non- GAAP financial measure, was $35.60 at September 30, 2026, an increase of $0.44 from June 30, 2026. See “Non-GAAP Financial Measures and Reconciliations” below. Uninsured deposits and uninsured and uncollateralized deposits are reported for our wholly-owned subsidiary Sunflower Bank, N.A. 3 3 3
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Non-GAAP Financial Measures This press release (including the tables beginning on page 16) contains financial measures determined by methods other than in accordance with accounting principles generally accepted in the United States (“GAAP”). Our management uses these non-GAAP financial measures in their analysis of our performance and the efficiency of our operations. Management believes these non-GAAP measures provide a greater understanding of ongoing operations, enhance comparability of results with prior periods and demonstrate the effects of significant items in the current period. We believe a meaningful analysis of our financial performance requires an understanding of the factors underlying that performance. Our management believes investors may find these non-GAAP financial measures useful. These non-GAAP financial measures, however, should not be viewed as a substitute for financial measures determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies. Below is a listing of the non-GAAP measures used in this press release: • Tangible stockholders’ equity to tangible assets; • Tangible stockholders’ equity to tangible assets, reflecting net unrealized losses on HTM securities, net of tax; • Tangible book value per share; • Adjusted net income; • Adjusted diluted earnings per share; • Adjusted return on average total assets; • Adjusted return on average stockholders’ equity; • Return on average tangible stockholders’ equity; • Tangible net income; • Adjusted return on average tangible stockholders’ equity; • Adjusted total noninterest expense; • Adjusted efficiency ratio; and • Fully tax equivalent (“FTE”) net interest income and net interest margin. The tables beginning on page 16 provide a reconciliation of the non-GAAP financial measures contained in this press release to the most comparable GAAP equivalent. About FirstSun FirstSun Capital Bancorp (“FirstSun”) (NASDAQ: FSUN), headquartered in Denver, Colorado, is the financial holding company for wholly owned subsidiaries including Sunflower Bank, N.A. and First Foundation Advisors. Through its subsidiaries and affiliated entities, FirstSun provides a full range of relationship-focused services to meet personal, business, and wealth management financial objectives, with depository branches in ten states and mortgage capabilities in 44 states. FirstSun had total consolidated assets of $15.3 billion as of September 30, 2026. To learn more, visit ir.firstsuncb.com or SunflowerBank.com. Investor Earnings Conference Call FirstSun will host a conference call on Tuesday, October 27, 2026 at 11:00 a.m. (ET) to discuss its third quarter 2026 financial results. Participants may join by phone by dialing (833) 461-5787 for toll-free within the U.S. and (585) 542-9983 for all other locations. The conference Meeting ID is 141121855. The numbers for international participants are available here: https://help.events.q4inc.com/eahc/international-dial-in-numbers. An audio replay of the live call, and the accompanying presentation slides, will be available following the live event on the “Events & Presentations” page of FirstSun’s website at https://ir.firstsuncb.com/overview/default.aspx. FTE net interest income and net interest margin are calculated using a federal tax rate of 21%. 4 4 4
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Deposits Classification Previously, deposit amounts related to certain NOW accounts with limited monthly transaction activity were able to be reclassified to money market accounts to reduce reserve requirements at the Federal Reserve. As there is no longer any impact to reserve requirements across different deposit products, we have discontinued this product reclassification practice and have revised the presentation of those deposits to conform to the current presentation for periods prior to March 31, 2026. Certain insured reciprocal deposits acquired in the First Foundation acquisition were reclassified from savings deposits to money market deposits as of June 30, 2026, to conform to the current presentation. Additionally, in conjunction with the integration of First Foundation, certain deposit products were converted from money market accounts to interest bearing demand accounts in the third quarter of 2026. CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact are forward-looking statements. Examples of forward-looking statements include, but are not limited to, statements regarding the impact of our acquisition of First Foundation and our completion of the related balance sheet repositioning strategy, our relationship-based business model, our markets, our risk profile, our ability to drive growth, that we are well positioned for continued success, and our ability to deliver strong financial results and sustainable long-term stockholder value. These statements reflect management’s current expectations and are not guarantees of future performance. Words such as “focus,” “confident,” “may,” “will,” “believe,” “anticipate,” “expect,” “intend,” “opportunity,” “continue,” “should,” “could,” “excited,” “progress” and variations of such words and similar expressions are intended to identify such forward-looking statements. Forward-looking statements are subject to risks, uncertainties and assumptions that are difficult to predict with regard to timing, extent, likelihood and degree of occurrence, which could cause actual results to differ materially from anticipated results. Such risks, uncertainties and assumptions, include, among others, the following: changes in interest rates and their related impact on macroeconomic conditions, customer behavior, our funding costs and our loan and securities portfolios; the quality or composition of our loan or investment portfolios and changes therein; failure to maintain our mortgage production flow to secondary markets; the sufficiency of liquidity and changes in our capital position; the inability of our infrastructure initiatives to reduce expenses; increased deposit volatility; potential regulatory developments; U.S. and global trade policies and tensions, including changes in, or the imposition of, tariffs and/or trade barriers and the economic impacts, volatility and uncertainty resulting therefrom; ongoing geopolitical conflicts, including hostilities involving Iran and the Middle East, which may contribute to volatility in energy prices, inflation, financial markets, cybersecurity threats, and broader macroeconomic conditions, any of which could adversely affect our borrowers, deposit base, liquidity, capital and results of operations; the possibility that the anticipated benefits of the First Foundation merger, including anticipated cost savings and strategic gains, are not realized when expected or at all; the integration of the businesses and operations of FirstSun and First Foundation may take longer than anticipated or be more costly than anticipated or have unanticipated adverse results relating to the combined company’s business; the diversion of management’s attention from ongoing business operations and opportunities due to the integration of the First Foundation merger; credit risk in our loan portfolio; and other factors, many of which are beyond our control. We caution readers that the foregoing list of factors is not exclusive, is not necessarily in order of importance and readers should not place undue reliance on any forward-looking statements. Additional information concerning additional factors that could materially affect the forward-looking statements in this press release can be found in the cautionary language included under the headings “Cautionary Note Regarding Forward-Looking Statements” and “Risk Factors” in FirstSun’s Annual Report on Form 10-K for the year ended December 31, 2025 and other documents subsequently filed by FirstSun with the SEC. Further, any forward-looking statement speaks only as of the date on which it is made and we do not intend to and disclaim any obligation to update or revise 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, except as required by law. 5
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Summary Data: As of and for the three months ended ($ in thousands, except per shareamounts) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Net interest income $ 140,301 $ 143,195 $ 82,779 $ 83,461 $ 80,953 Provision for credit losses 4,400 40,400 8,250 6,200 10,100 Noninterest income 39,382 40,948 27,175 26,744 26,333 Noninterest expense 126,553 171,712 75,341 72,041 68,901 Income (loss) before income taxes 48,730 (27,969) 26,363 31,964 28,285 Provision for (benefit from)income taxes 10,348 (5,119) 4,780 7,157 5,111 Net income (loss) 38,382 (22,850) 21,583 24,807 23,174 Adjusted net income 48,212 21,021 23,673 26,923 23,412 Weighted average common sharesoutstanding, basic 46,304,015 46,722,106 27,851,041 27,839,044 27,801,255 Weighted average common sharesoutstanding, diluted 46,871,679 46,722,106 28,316,608 28,262,530 28,291,778 Diluted earnings (loss) per share $ 0.82 $ (0.49) $ 0.76 $ 0.88 $ 0.82 Adjusted diluted earnings pershare 1.03 0.45 0.84 0.95 0.83 Return on average total assets 0.98 % (0.54)% 1.04 % 1.17 % 1.09 % Adjusted return on average totalassets 1.23 % 0.50 % 1.14 % 1.27 % 1.10 % Return on average stockholders'equity 8.23 % (4.92)% 7.47 % 8.58 % 8.22 % Adjusted return on averagestockholders' equity 10.33 % 4.52 % 8.20 % 9.31 % 8.31 % Return on average tangiblestockholders' equity 9.97 % (4.69)% 8.31 % 9.58 % 9.20 % Adjusted return on averagetangible stockholders' equity 12.32 % 5.86 % 9.10 % 10.38 % 9.30 % Net interest margin 3.82 % 3.58 % 4.25 % 4.18 % 4.07 % Net interest margin (FTE basis) 3.87 % 3.63 % 4.31 % 4.23 % 4.12 % Efficiency ratio 70.43 % 93.25 % 68.52 % 65.37 % 64.22 % Adjusted efficiency ratio 63.06 % 61.99 % 66.08 % 63.36 % 64.00 % Noninterest income to totalrevenue 21.9 % 22.2 % 24.7 % 24.3 % 24.5 % Total assets $ 15,276,885 $ 15,717,985 $ 8,565,123 $ 8,485,162 $ 8,495,437 Loans held-for-sale 120,491 140,706 144,407 100,539 85,250 Loans held-for-investment 11,457,891 11,568,443 6,939,972 6,673,180 6,681,629 Total deposits 12,970,958 13,418,004 7,087,513 7,107,356 7,105,415 Total stockholders' equity 1,810,506 1,837,392 1,175,507 1,153,356 1,127,513 Loan to deposit ratio 88.3 % 86.2 % 97.9 % 93.9 % 94.0 % Period end common sharesoutstanding 45,552,676 46,765,434 27,935,888 27,887,337 27,854,764 Book value per share $ 39.75 $ 39.29 $ 42.08 $ 41.36 $ 40.48 Tangible book value per share 35.60 35.16 38.57 37.83 36.92 Represents a non-GAAP financial measure. See the tables beginning on page 16 for a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. Total revenue is net interest income plus noninterest income. 1 1 1 1 1 1 1 1 2 1 1 2 6
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Summary Data (cont’d): As of and for the nine months ended ($ in thousands, except per share amounts) September 30,2026 September 30,2025 Net interest income $ 366,275 $ 233,930 Provision for credit losses 53,050 18,400 Noninterest income 107,505 75,135 Noninterest expense 373,606 199,733 Income before income taxes 47,124 90,932 Provision for income taxes 10,009 17,803 Net income 37,115 73,129 Adjusted net income 92,906 73,655 Weighted average common shares outstanding, basic 40,343,797 27,769,320 Weighted average common shares outstanding, diluted 40,901,707 28,274,134 Diluted earnings per share $ 0.91 $ 2.59 Adjusted diluted earnings per share $ 2.27 $ 2.61 Return on average total assets 0.36 % 1.19 % Adjusted return on average total assets 0.91 % 1.20 % Return on average stockholders' equity 3.04 % 8.99 % Adjusted return on average stockholders’ equity 7.61 % 9.05 % Return on average tangible stockholders' equity 4.02 % 10.08 % Adjusted return on average tangible stockholders' equity 9.10 % 10.16 % Net interest margin 3.81 % 4.07 % Net interest margin (FTE basis) 3.86 % 4.13 % Efficiency ratio 78.86 % 64.62 % Adjusted efficiency ratio 63.35 % 64.45 % Noninterest income to total revenue 22.7 % 24.3 % Total assets $ 15,276,885 $ 8,495,437 Loans held-for-sale 120,491 85,250 Loans held-for-investment 11,457,891 6,681,629 Total deposits 12,970,958 7,105,415 Total stockholders' equity 1,810,506 1,127,513 Loan to deposit ratio 88.3 % 94.0 % Period end common shares outstanding 45,552,676 27,854,764 Book value per share $ 39.75 $ 40.48 Tangible book value per share $ 35.60 $ 36.92 Represents a non-GAAP financial measure. See the tables beginning on page 16 for a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. Total revenue is net interest income plus noninterest income. 1 1 1 1 1 1 1 1 2 1 1 2 7
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Condensed Consolidated Statements of Income (Unaudited): For the three months ended For the nine months ended ($ in thousands, except per share amounts) September 30,2026 September 30,2025 September 30,2026 September 30,2025 Total interest income $ 216,662 $ 121,128 $ 562,804 $ 348,496 Total interest expense 76,361 40,175 196,529 114,566 Net interest income 140,301 80,953 366,275 233,930 Provision for credit losses 4,400 10,100 53,050 18,400 Net interest income after credit loss expense 135,901 70,853 313,225 215,530 Noninterest income: Deposit account service fees 2,371 2,162 6,759 6,205 Treasury management service fees 5,096 4,402 14,776 12,929 Credit and debit card fees 3,060 2,671 8,725 7,985 Trust and investment advisory fees 9,881 1,536 20,783 4,430 Mortgage banking services, net 12,743 12,641 43,016 34,970 Other noninterest income 6,231 2,921 13,446 8,616 Total noninterest income 39,382 26,333 107,505 75,135 Noninterest expense: Salary and employee benefits 63,344 44,822 179,444 128,304 Occupancy, equipment and software 15,532 9,591 41,042 28,668 Customer service costs 2,762 — 5,504 — Amortization and impairment of intangible assets 4,238 578 8,982 1,784 Merger related expenses 13,246 241 73,486 526 Other noninterest expenses 27,431 13,669 65,148 40,451 Total noninterest expense 126,553 68,901 373,606 199,733 Income before income taxes 48,730 28,285 47,124 90,932 Provision for income taxes 10,348 5,111 10,009 17,803 Net income $ 38,382 $ 23,174 $ 37,115 $ 73,129 Earnings per share - basic $ 0.83 $ 0.83 $ 0.92 $ 2.63 Earnings per share - diluted 0.82 0.82 $ 0.91 $ 2.59 8
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Condensed Consolidated Statements of Income (Unaudited) (cont’d): For the three months ended ($ in thousands, except per shareamounts) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Total interest income $ 216,662 $ 230,016 $ 116,126 $ 119,273 $ 121,128 Total interest expense 76,361 86,821 33,347 35,812 40,175 Net interest income 140,301 143,195 82,779 83,461 80,953 Provision for credit losses 4,400 40,400 8,250 6,200 10,100 Net interest income after creditloss expense 135,901 102,795 74,529 77,261 70,853 Noninterest income: Deposit account service fees 2,371 2,292 2,096 2,116 2,162 Treasury management service fees 5,096 5,067 4,613 4,544 4,402 Credit and debit card fees 3,060 2,952 2,713 2,744 2,671 Trust and investment advisory fees 9,881 9,413 1,489 1,515 1,536 Mortgage banking services, net 12,743 15,958 14,315 12,102 12,641 Other noninterest income 6,231 5,266 1,949 3,723 2,921 Total noninterest income 39,382 40,948 27,175 26,744 26,333 Noninterest expense: Salary and employee benefits 63,344 68,744 47,356 43,520 44,822 Occupancy, equipment andsoftware 15,532 15,504 10,006 9,576 9,591 Customer service costs 2,762 2,742 — — — Amortization and impairment ofintangible assets 4,238 4,237 507 628 578 Merger related expenses 13,246 57,559 2,681 2,217 241 Other noninterest expenses 27,431 22,926 14,791 16,100 13,669 Total noninterest expense 126,553 171,712 75,341 72,041 68,901 Income (loss) beforeincome taxes 48,730 (27,969) 26,363 31,964 28,285 Provision for (benefit from) incometaxes 10,348 (5,119) 4,780 7,157 5,111 Net income (loss) $ 38,382 $ (22,850) $ 21,583 $ 24,807 $ 23,174 Earnings (loss) per share -basic $ 0.83 $ (0.49) $ 0.77 $ 0.89 $ 0.83 Earnings (loss) per share - diluted 0.82 (0.49) 0.76 0.88 0.82 9
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Condensed Consolidated Balance Sheets as of (Unaudited): ($ in thousands) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Assets Cash and cash equivalents $ 729,157 $ 989,511 $ 413,732 $ 652,592 $ 659,899 Securities available-for-sale, at fair value 1,827,344 1,907,374 458,543 468,970 476,114 Securities held-to-maturity 32,213 33,274 33,553 33,839 34,247 Loans held-for-sale, at fair value 120,491 140,706 144,407 100,539 85,250 Loans 11,457,891 11,568,443 6,939,972 6,673,180 6,681,629 Allowance for credit losses (174,638) (173,551) (82,955) (85,016) (84,040) Loans, net 11,283,253 11,394,892 6,857,017 6,588,164 6,597,589 Mortgage servicing rights, at fair value 107,405 99,736 88,993 86,651 85,695 Premises and equipment, net 118,751 118,967 81,138 81,523 81,886 Other real estate owned and foreclosed assets, net 20,502 16,808 10,908 11,514 13,418 Goodwill 102,536 102,536 93,483 93,483 93,483 Core deposits and other intangible assets, net 86,215 90,452 4,476 4,983 5,650 Other assets 849,018 823,729 378,873 362,904 362,206 Total assets $ 15,276,885 $ 15,717,985 $ 8,565,123 $ 8,485,162 $ 8,495,437 Liabilities and Stockholders' Equity Liabilities: Deposits: Noninterest-bearing accounts $ 2,671,066 $ 2,673,289 $ 1,599,919 $ 1,651,373 $ 1,674,497 Interest-bearing accounts: Demand and NOW 3,181,848 2,869,439 1,569,910 1,483,841 1,457,886 Savings 1,747,226 1,961,598 387,140 378,631 386,235 Money market 3,436,362 3,902,069 2,318,768 2,301,837 2,233,309 Certificates of deposit 1,934,456 2,011,609 1,211,776 1,291,674 1,353,488 Total deposits 12,970,958 13,418,004 7,087,513 7,107,356 7,105,415 Securities sold under agreements to repurchase 18,687 17,475 7,670 11,160 9,824 Federal Home Loan Bank advances — — 75,000 — — Subordinated debt, net 206,222 205,256 36,754 36,680 76,163 Other liabilities 270,512 239,858 182,679 176,610 176,522 Total liabilities 13,466,379 13,880,593 7,389,616 7,331,806 7,367,924 Stockholders' equity: Preferred stock — — — — — Common stock 5 5 3 3 3 Additional paid-in capital 1,189,456 1,238,000 550,709 549,617 548,952 Retained earnings 668,201 629,819 652,669 631,086 606,279 Accumulated other comprehensive loss, net (47,156) (30,432) (27,874) (27,350) (27,721) Total stockholders' equity 1,810,506 1,837,392 1,175,507 1,153,356 1,127,513 Total liabilities and stockholders'equity $ 15,276,885 $ 15,717,985 $ 8,565,123 $ 8,485,162 $ 8,495,437 10
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Consolidated Capital Ratios as of: September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Stockholders' equity to total assets 11.85 % 11.69 % 13.72 % 13.59 % 13.27 % Tangible stockholders' equity totangible assets 10.75 % 10.59 % 12.73 % 12.58 % 12.25 % Tangible stockholders' equity totangible assets reflecting netunrealized losses on HTMsecurities, net of tax 10.72 % 10.57 % 12.69 % 12.54 % 12.21 % Tier 1 leverage ratio 10.33 % 9.47 % 13.06 % 12.75 % 12.44 % Common equity tier 1 risk-basedcapital ratio 11.99 % 11.95 % 13.77 % 14.12 % 13.79 % Tier 1 risk-based capital ratio 11.99 % 11.95 % 13.77 % 14.12 % 13.79 % Total risk-based capital ratio 14.29 % 14.13 % 15.29 % 15.73 % 15.81 % Represents a non-GAAP financial measure. See the tables beginning on page 16 for a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. Tangible stockholders’ equity and tangible assets have been adjusted to reflect net unrealized losses on held-to-maturity securities, net of tax. 1 1, 2 1 2 11
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Summary of Net Interest Margin: For the three months ended For the nine months ended September 30, 2026 September 30, 2025 September 30, 2026 September 30, 2025 (In thousands) AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate Interest Earning Assets Loans $ 11,650,322 6.33 % $ 6,667,158 6.49 % $ 10,418,262 6.27 % $ 6,570,356 6.43 % Investment securities 1,912,990 4.52 % 505,999 3.43 % 1,507,230 4.52 % 506,068 3.48 % Interest-bearing cash andother assets 1,015,170 3.49 % 714,885 4.25 % 935,974 3.34 % 604,936 4.29 % Total earning assets 14,578,482 5.90 % 7,888,042 6.09 % 12,861,466 5.85 % 7,681,360 6.07 % Other assets 953,709 540,079 814,541 542,038 Total assets $ 15,532,191 $ 8,428,121 $ 13,676,007 $ 8,223,398 Interest-bearing liabilities Demand and NOW deposits $ 2,782,453 2.05 % $ 1,437,298 1.89 % $ 2,445,045 1.98 % $ 1,475,608 1.77 % Savings deposits 1,917,139 2.82 % 391,444 0.59 % 1,410,811 2.62 % 397,745 0.58 % Money market deposits 3,896,991 2.90 % 2,211,754 3.28 % 3,443,184 2.88 % 1,947,606 3.23 % Certificates of deposit 1,935,244 3.37 % 1,397,371 3.64 % 1,982,827 3.35 % 1,482,529 3.77 % Total deposits 10,531,827 2.75 % 5,437,867 2.81 % 9,281,867 2.70 % 5,303,488 2.78 % Repurchase agreements 19,963 2.50 % 8,055 1.82 % 17,752 2.40 % 8,892 1.66 % Total deposits andrepurchase agreements 10,551,790 2.75 % 5,445,922 2.81 % 9,299,619 2.70 % 5,312,380 2.77 % FHLB borrowings — — % — — % 50,154 3.95 % 10,491 4.61 % Other long-term borrowings 205,786 6.38 % 76,117 8.41 % 149,676 6.37 % 76,017 7.02 % Total interest-bearingliabilities 10,757,576 2.82 % 5,522,039 2.89 % 9,499,449 2.77 % 5,398,888 2.84 % Noninterest-bearing deposits 2,665,398 1,642,346 2,307,562 1,587,670 Other liabilities 257,967 145,730 237,672 148,675 Stockholders' equity 1,851,250 1,118,006 1,631,324 1,088,165 Total liabilitiesand stockholders'equity $ 15,532,191 $ 8,428,121 $ 13,676,007 $ 8,223,398 Net interest spread 3.08 % 3.20 % 3.08 % 3.23 % Net interest margin 3.82 % 4.07 % 3.81 % 4.07 % Net interest margin (on FTEbasis) 3.87 % 4.12 % 3.86 % 4.13 % Includes loans held-for-investment, including nonaccrual loans, and loans held-for-sale. Represents a non-GAAP financial measure. See the tables beginning on page 16 for a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. 1 2 1 2 12
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Summary of Net Interest Margin (cont’d ): For the three months ended September 30, 2026 June 30, 2026 March 31, 2026 December 31, 2025 September 30, 2025 (In thousands) AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate AverageBalance AverageYield/Rate Interest Earning Assets Loans $11,650,322 6.33 % $12,694,317 6.16 % $6,857,477 6.36 % $6,825,404 6.37 % $6,667,158 6.49 % Investment securities 1,912,990 4.52 % 2,093,214 4.80 % 499,792 3.30 % 506,964 3.35 % 505,999 3.43 % Interest-bearing cash and otherassets 1,015,170 3.49 % 1,244,337 3.20 % 543,396 3.36 % 583,717 3.68 % 714,885 4.25 % Total earning assets 14,578,482 5.90 % 16,031,868 5.75 % 7,900,665 5.96 % 7,916,085 5.98 % 7,888,042 6.09 % Other assets 953,709 962,089 523,094 519,607 540,079 Total assets $15,532,191 $16,993,957 $8,423,759 $8,435,692 $8,428,121 Interest-bearing liabilities Demand and NOW deposits $ 2,782,453 2.05 % $ 3,012,754 2.06 % $1,526,124 1.69 % $1,464,053 1.75 % $1,437,298 1.89 % Savings deposits 1,917,139 2.82 % 1,970,300 2.84 % 382,025 0.50 % 381,978 0.55 % 391,444 0.59 % Money market deposits 3,896,991 2.90 % 4,069,523 2.87 % 2,291,494 2.84 % 2,247,034 2.99 % 2,211,754 3.28 % Certificates of deposit 1,935,244 3.37 % 2,798,815 3.35 % 1,206,411 3.32 % 1,284,200 3.49 % 1,397,371 3.64 % Total deposits 10,531,827 2.75 % 11,851,392 2.77 % 5,406,054 2.46 % 5,377,265 2.60 % 5,437,867 2.81 % Repurchase agreements 19,963 2.50 % 23,468 2.61 % 9,712 1.70 % 9,146 1.71 % 8,055 1.82 % Total deposits andrepurchase agreements 10,551,790 2.75 % 11,874,860 2.77 % 5,415,766 2.46 % 5,386,411 2.60 % 5,445,922 2.81 % FHLB borrowings — — % 149,374 3.97 % 1,100 3.12 % — — % — — % Other long-term borrowings 205,786 6.38 % 204,667 6.46 % 36,719 5.72 % 36,650 5.82 % 76,117 8.41 % Total interest-bearingliabilities 10,757,576 2.82 % 12,228,901 2.85 % 5,453,585 2.48 % 5,423,061 2.62 % 5,522,039 2.89 % Noninterest-bearing deposits 2,665,398 2,622,311 1,623,528 1,698,126 1,642,346 Other liabilities 257,967 278,849 175,292 167,658 145,730 Stockholders' equity 1,851,250 1,863,896 1,171,354 1,146,847 1,118,006 Total liabilities andstockholders'equity $15,532,191 $16,993,957 $8,423,759 $8,435,692 $8,428,121 Net interest spread 3.08 % 2.90 % 3.48 % 3.36 % 3.20 % Net interest margin 3.82 % 3.58 % 4.25 % 4.18 % 4.07 % Net interest margin (on FTEbasis) 3.87 % 3.63 % 4.31 % 4.23 % 4.12 % Includes loans held-for-investment, including nonaccrual loans, and loans held-for-sale. Represents a non-GAAP financial measure. See the tables beginning on page 16 for a reconciliation of each non-GAAP measure to the most comparable GAAP equivalent. 1 2 1 2 13
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Deposits as of: ($ in thousands) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Consumer Noninterest-bearing deposit accounts $ 1,093,197 $ 1,000,584 $ 410,296 $ 404,666 $ 412,568 Interest-bearing deposit accounts: Demand and NOW 1,048,086 937,796 607,465 590,535 598,499 Savings 1,233,040 1,469,618 313,910 308,655 314,954 Money market 2,144,717 2,488,103 1,397,890 1,400,593 1,416,258 Certificates of deposit 938,097 1,044,959 793,503 809,401 869,077 Total interest-bearing depositaccounts 5,363,940 5,940,476 3,112,768 3,109,184 3,198,788 Total consumer deposits $ 6,457,137 $ 6,941,060 $ 3,523,064 $ 3,513,850 $ 3,611,356 Business Noninterest-bearing deposit accounts $ 1,577,869 $ 1,672,705 $ 1,189,623 $ 1,246,707 $ 1,261,929 Interest-bearing deposit accounts: Demand and NOW 2,133,750 1,905,387 962,445 893,306 859,387 Savings 478,534 434,076 73,230 69,976 71,281 Money market 1,291,645 1,413,966 920,878 901,244 817,051 Certificates of deposit 126,640 103,360 51,940 57,349 57,225 Total interest-bearing depositaccounts 4,030,569 3,856,789 2,008,493 1,921,875 1,804,944 Total business deposits $ 5,608,438 $ 5,529,494 $ 3,198,116 $ 3,168,582 $ 3,066,873 Wholesale $ 905,383 $ 947,450 $ 366,333 $ 424,924 $ 427,186 Total deposits $ 12,970,958 $ 13,418,004 $ 7,087,513 $ 7,107,356 $ 7,105,415 Wholesale deposits primarily consist of brokered deposits included in our condensed consolidated balance sheets within certificates of deposit. Balance Sheet Ratios as of: September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Cash to total assets 4.7 % 6.2 % 4.7 % 7.6 % 7.7 % Loan to deposit ratio 88.3 % 86.2 % 97.9 % 93.9 % 94.0 % Uninsured deposits to total deposits 33.2 % 31.6 % 35.4 % 36.6 % 36.2 % Uninsured and uncollateralizeddeposits to total deposits 25.8 % 28.0 % 28.6 % 29.0 % 28.3 % Wholesale deposits and borrowingsto total liabilities 6.7 % 6.8 % 6.0 % 5.8 % 5.8 % Cash consists of unencumbered cash and amounts due from banks and interest-bearing deposits with other financial institutions. Uninsured deposits and uninsured and uncollateralized deposits are reported for our wholly-owned subsidiary Sunflower Bank, N.A. and are estimated. Wholesale deposits primarily consist of brokered deposits included in our condensed consolidated balance sheets within certificates of deposit. Wholesale borrowings consist of FHLB overnight and term advances. 1 1 1 2 2 3 1 2 3 14
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Loan Portfolio as of: ($ in thousands) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Commercial and industrial $ 3,663,661 $ 3,579,772 $ 3,160,777 $ 2,937,867 $ 2,945,697 Commercial real estate: Non-owner occupied 1,136,193 1,195,172 778,778 742,002 725,425 Owner occupied 919,091 951,226 694,190 700,774 668,172 Construction and land 256,561 218,441 280,781 268,652 343,803 Multifamily 2,543,964 2,613,194 227,980 210,368 183,504 Total commercial real estate 4,855,809 4,978,033 1,981,729 1,921,796 1,920,904 Residential real estate 1,891,223 1,913,575 1,216,810 1,221,086 1,209,742 Public Finance 929,074 957,556 494,539 501,582 516,247 Consumer 36,815 29,569 31,875 32,651 38,931 Other 100,905 114,047 54,242 58,198 50,108 Loans, excluding loanhedge fair value 11,477,487 11,572,552 6,939,972 6,673,180 6,681,629 Loan hedge fair value (19,596) (4,109) — — — Loans $ 11,457,891 $ 11,568,443 $ 6,939,972 $ 6,673,180 $ 6,681,629 Includes 1-4 family residential construction.Represents fair value hedge basis adjustments related to active portfolio layer method hedges, which are not allocated to individual loans. Asset Quality: As of and for the three months ended ($ in thousands) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 Net charge-offs $ 3,313 $ 42,404 $ 10,561 $ 5,024 $ 9,053 Allowance for credit losses 174,638 173,551 82,955 85,016 84,040 Nonperforming loans, including nonaccrualloans, and accrual loans greater than 90days past due 202,851 190,115 59,656 60,771 69,641 Nonperforming assets 223,353 206,923 70,564 72,285 83,059 Ratio of net charge-offs to average loansoutstanding 0.11 % 1.45 % 0.63 % 0.30 % 0.55 % Allowance for credit losses to loansoutstanding 1.52 % 1.50 % 1.20 % 1.27 % 1.26 % Allowance for credit losses tononperforming loans 86.09 % 91.29 % 139.06 % 139.90 % 120.68 % Nonperforming loans to loans 1.77 % 1.64 % 0.86 % 0.91 % 1.04 % Nonperforming assets to total assets 1.46 % 1.32 % 0.82 % 0.85 % 0.98 % 1 2 1 2 15
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Non-GAAP Financial Measures and Reconciliations: As of and for the three months ended As of and for the nine monthsended ($ in thousands, except share and pershare amounts) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 September 30,2026 September 30,2025 Tangible stockholders’ equity to tangible assets: Total stockholders' equity (GAAP) $ 1,810,506 $ 1,837,392 $ 1,175,507 $ 1,153,356 $ 1,127,513 $ 1,810,506 $ 1,127,513 Less: Goodwill and otherintangible assets Goodwill (102,536) (102,536) (93,483) (93,483) (93,483) (102,536) (93,483) Other intangible assets (86,215) (90,452) (4,476) (4,983) (5,650) (86,215) (5,650) Tangible stockholders'equity (non-GAAP) $ 1,621,755 $ 1,644,404 $ 1,077,548 $ 1,054,890 $ 1,028,380 $ 1,621,755 $ 1,028,380 Total assets (GAAP) $ 15,276,885 $ 15,717,985 $ 8,565,123 $ 8,485,162 $ 8,495,437 $ 15,276,885 $ 8,495,437 Less: Goodwill and otherintangible assets Goodwill (102,536) (102,536) (93,483) (93,483) (93,483) (102,536) (93,483) Other intangible assets (86,215) (90,452) (4,476) (4,983) (5,650) (86,215) (5,650) Tangible assets (non-GAAP) $ 15,088,134 $ 15,524,997 $ 8,467,164 $ 8,386,696 $ 8,396,304 $ 15,088,134 $ 8,396,304 Total stockholders' equity to totalassets (GAAP) 11.85 % 11.69 % 13.72 % 13.59 % 13.27 % 11.85 % 13.27 % Less: Impact of goodwill andother intangible assets (1.10)% (1.10)% (0.99)% (1.01)% (1.02)% (1.10)% (1.02)% Tangible stockholders' equityto tangible assets (non-GAAP) 10.75 % 10.59 % 12.73 % 12.58 % 12.25 % 10.75 % 12.25 % Tangible stockholders’ equity to tangible assets, reflecting net unrealized losses on HTM securities, net of tax: Tangible stockholders' equity (non-GAAP) $ 1,621,755 $ 1,644,404 $ 1,077,548 $ 1,054,890 $ 1,028,380 $ 1,621,755 $ 1,028,380 Less: Net unrealized losses onHTM securities, net of tax (4,315) (3,553) (3,407) (3,320) (3,432) (4,315) (3,432) Tangible stockholders’ equityless net unrealized losses onHTM securities, net of tax(non-GAAP) $ 1,617,440 $ 1,640,851 $ 1,074,141 $ 1,051,570 $ 1,024,948 $ 1,617,440 $ 1,024,948 Tangible assets (non-GAAP) $ 15,088,134 $ 15,524,997 $ 8,467,164 $ 8,386,696 $ 8,396,304 $ 15,088,134 $ 8,396,304 Less: Net unrealized losses onHTM securities, net of tax (4,315) (3,553) (3,407) (3,320) (3,432) (4,315) (3,432) Tangible assets less netunrealized losses on HTMsecurities, net of tax (non-GAAP) $ 15,083,819 $ 15,521,444 $ 8,463,757 $ 8,383,376 $ 8,392,872 $ 15,083,819 $ 8,392,872 Tangible stockholders’ equity totangible assets (non-GAAP) 10.75 % 10.59 % 12.73 % 12.58 % 12.25 % 10.75 % 12.25 % Less: Impact of net unrealizedlosses on HTM securities, net oftax (0.03)% (0.02)% (0.04)% (0.04)% (0.04)% (0.03)% (0.04)% Tangible stockholders’ equityto tangible assets reflectingnet unrealized losses on HTMsecurities, net of tax (non-GAAP) 10.72 % 10.57 % 12.69 % 12.54 % 12.21 % 10.72 % 12.21 % 16
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Non-GAAP Financial Measures and Reconciliations: As of and for the three months ended As of and for the nine monthsended ($ in thousands, except share and pershare amounts) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 September 30,2026 September 30,2025 Tangible book value per share: Total stockholders' equity (GAAP) $ 1,810,506 $ 1,837,392 $ 1,175,507 $ 1,153,356 $ 1,127,513 $ 1,810,506 $ 1,127,513 Tangible stockholders' equity (non-GAAP) 1,621,755 1,644,404 1,077,548 1,054,890 1,028,380 $ 1,621,755 $ 1,028,380 Total shares outstanding 45,552,676 46,765,434 27,935,888 27,887,337 27,854,764 45,552,676 27,854,764 Book value per share (GAAP) $ 39.75 $ 39.29 $ 42.08 $ 41.36 $ 40.48 $ 39.75 $ 40.48 Tangible book value per share (non-GAAP) $ 35.60 $ 35.16 $ 38.57 $ 37.83 $ 36.92 $ 35.60 $ 36.92 Adjusted net income: Net income (loss) (GAAP) $ 38,382 $ (22,850) $ 21,583 $ 24,807 $ 23,174 $ 37,115 $ 73,129 Add: Adjustments Merger related expenses, net oftax 9,830 43,871 2,090 2,116 238 55,791 526 Total adjustments, net of tax 9,830 43,871 2,090 2,116 238 55,791 526 Adjusted net income(non-GAAP) $ 48,212 $ 21,021 $ 23,673 $ 26,923 $ 23,412 $ 92,906 $ 73,655 Adjusted diluted earnings per share: Diluted earnings (loss) per share(GAAP) $ 0.82 $ (0.49) $ 0.76 $ 0.88 $ 0.82 $ 0.91 $ 2.59 Add: Impact of adjustments Merger related expenses, net oftax 0.21 0.94 0.08 0.07 0.01 1.36 0.02 Adjusted diluted earningsper share (non-GAAP) $ 1.03 $ 0.45 $ 0.84 $ 0.95 $ 0.83 $ 2.27 $ 2.61 Adjusted return on average total assets: Return on average total assets(ROAA) (GAAP) 0.98 % (0.54)% 1.04 % 1.17 % 1.09 % 0.36 % 1.19 % Add: Impact of adjustments Merger related expenses, netof tax 0.25 % 1.04 % 0.10 % 0.10 % 0.01 % 0.55 % 0.01 % Adjusted ROAA (non-GAAP) 1.23 % 0.50 % 1.14 % 1.27 % 1.10 % 0.91 % 1.20 % Adjusted return on average stockholders’ equity: Return on average stockholders'equity (ROAE) (GAAP) 8.23 % (4.92)% 7.47 % 8.58 % 8.22 % 3.04 % 8.99 % Add: Impact of adjustments Merger related expenses, netof tax 2.10 % 9.44 % 0.73 % 0.73 % 0.09 % 4.57 % 0.06 % Adjusted ROAE (non-GAAP) 10.33 % 4.52 % 8.20 % 9.31 % 8.31 % 7.61 % 9.05 % 17
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Non-GAAP Financial Measures and Reconciliations: As of and for the three months ended As of and for the nine monthsended ($ in thousands, except share and pershare amounts) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 September 30,2026 September 30,2025 Tangible net income: Net Income (GAAP) $ 38,382 $ (22,850) $ 21,583 $ 24,807 $ 23,174 $ 37,115 $ 73,129 Add: Intangible amortization, net oftax 3,348 3,347 401 496 457 7,096 1,409 Tangible net income (non-GAAP) $ 41,730 $ (19,503) $ 21,984 $ 25,303 $ 23,631 $ 44,211 $ 74,538 Return on average tangible stockholders’ equity Return on average stockholders’ equity(ROAE) (GAAP) 8.23 % (4.92)% 7.47 % 8.58 % 8.22 % 3.04 % 8.99 % Add: Impact of excluding averagegoodwill and other intangible assets,inclusive of after-tax intangibleamortization Goodwill 0.94 % (0.57)% 0.69 % 0.81 % 0.81 % 0.34 % 0.90 % Other intangible assets 0.80 % 0.80 % 0.15 % 0.19 % 0.17 % 0.64 % 0.19 % Return on average tangiblestockholders’ equity(ROATE) (non-GAAP) 9.97 % (4.69)% 8.31 % 9.58 % 9.20 % 4.02 % 10.08 % Adjusted return on average tangible stockholders’ equity: Return on average tangiblestockholders' equity (ROATE) (non-GAAP) 9.97 % (4.69)% 8.31 % 9.58 % 9.20 % 4.02 % 10.08 % Add: Impact of adjustments Merger related expenses, net oftax 2.35 % 10.55 % 0.79 % 0.80 % 0.10 % 5.08 % 0.08 % Adjusted ROATE (non-GAAP) 12.32 % 5.86 % 9.10 % 10.38 % 9.30 % 9.10 % 10.16 % Adjusted total noninterest expense: Total noninterest expense (GAAP) $ 126,553 $ 171,712 $ 75,341 $ 72,041 $ 68,901 $ 373,606 $ 199,733 Less: Adjustments: Merger related expenses (13,246) (57,559) (2,681) (2,217) (241) (73,486) (526) Total adjustments (13,246) (57,559) (2,681) (2,217) (241) (73,486) (526) Adjusted total noninterestexpense (non-GAAP) $ 113,307 $ 114,153 $ 72,660 $ 69,824 $ 68,660 $ 300,120 $ 199,207 Adjusted efficiency ratio: Efficiency ratio (GAAP) 70.43 % 93.25 % 68.52 % 65.37 % 64.22 % 78.86 % 64.62 % Less: Impact of adjustments Merger related expenses (7.37)% (31.26)% (2.44)% (2.01)% (0.22)% (15.51)% (0.17)% Adjusted efficiency ratio(non-GAAP) 63.06 % 61.99 % 66.08 % 63.36 % 64.00 % 63.35 % 64.45 % 18
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Non-GAAP Financial Measures and Reconciliations: As of and for the three months ended As of and for the nine monthsended ($ in thousands, except share andper share amounts) September 30,2026 June 30,2026 March 31,2026 December 31,2025 September 30,2025 September 30,2026 September 30,2025 Fully tax equivalent (“FTE”) net interest income and net interest margin: Net interest income (GAAP) $ 140,301 $ 143,195 $ 82,779 $ 83,461 $ 80,953 $ 366,275 $ 233,930 Gross income effect of taxexempt income 1,904 2,198 1,198 1,156 1,225 5,300 3,621 FTE net interest income(non-GAAP) $ 142,205 $ 145,393 $ 83,977 $ 84,617 $ 82,178 $ 371,575 $ 237,551 Average earning assets $ 14,578,482 $ 16,031,868 $ 7,900,665 $ 7,916,085 $ 7,888,042 $ 12,861,466 $ 7,681,360 Net interest margin 3.82 % 3.58 % 4.25 % 4.18 % 4.07 % 3.81 % 4.07 % Net interest margin on FTE basis(non-GAAP) 3.87 % 3.63 % 4.31 % 4.23 % 4.12 % 3.86 % 4.13 % 19
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Contacts: Investor Contact: Ed Jacques Director of Investor Relations & Business Development, FirstSun Investor.Relations@firstsuncb.com Media Contact: Jeanne Lipson Director of Marketing, Sunflower Bank Jeanne.Lipson@SunflowerBank.com 20