Proprietary & Confidential INVESTOR PRESENTATION | Q2 2021 atlanticcapitalbank.com NASDAQ TICKER: ACBI

atlanticcapitalbank.com Forward-Looking Statements Disclaimer and Non-GAAP Financial Information This presentation contains forward-looking statements within the meaning of section 27A of the Securities Act of 1933, as amended, and 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward-looking statements reflect our current views with respect to, among other things, future events and our financial performance. These statements are often, but not always, made through the use of words or phrases such as “may,” “should,” “could,” “predict,” “potential,” “believe,” “will likely result,” “expect,” “continue,” “will,” “anticipate,” “seek,” “estimate,” “intend,” “plan,” “strive,” “projection,” “would,” and “outlook,” or the negative version of those words or other comparable words or phrases of a future or forward-looking nature. These forward-looking statements are not historical facts, and are based on current expectations, estimates, and projections about our industry, management’s beliefs, and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond our control. Accordingly, we caution you that any such forward-looking statements are not guarantees of future performance and are subject to risks, assumptions, and uncertainties that are difficult to predict. Although we believe that the expectations reflected in these forward-looking statements are reasonable as of the date made, actual results may prove to be materially different from the results expressed or implied by the forward-looking statements. The following risks, among others, could cause actual results to differ materially from the anticipated results or other expectations expressed in the forward-looking statements: The impact of the COVID-19 pandemic and the responses of governmental authorities on our operations, including declines in credit quality, strains on capital and liquidity, fluctuations in our fintech and payments processing business, and declines in deposits; our participation in the Paycheck Protection Program administered by the Small Business Administration (“SBA”); our strategic decision to focus on the greater Atlanta market may not positively impact our financial condition in the expected timeframe, or at all; costs associated with our growth and hiring initiatives in the Atlanta market area; risks associated with geographic concentration, borrower concentration and concentration in commercial real estate and commercial and industrial loans; our strategic decision to increase our focus on SBA and franchise lending may expose us to additional risks associated with these types of lending, including industry concentration risks, our ability to sell the guaranteed portion of SBA loans, the impact of negative economic conditions on small businesses’ ability to repay the non-guaranteed portions of SBA loans, and changes to applicable federal regulations; risks associated with our ability to manage the planned growth of our fintech and payments processing business, including evolving regulations, security risks, and unforeseen increases in transaction volume resulting from changes in our customers’ businesses and changes in the competitive landscape for fintech and payments processing; changes in asset quality and credit risk; the cost and availability of capital; customer acceptance of our products and services; customer borrowing, repayment, investment and deposit practices; the introduction, withdrawal, success and timing of business initiatives; the impact, extent, and timing of technological changes; severe catastrophic events in our geographic area; a weakening of the economies in which we conduct operations may adversely affect our operating results; the U.S. legal and regulatory framework could adversely affect the operating results of the Company; the interest rate environment may compress margins and adversely affect net interest income; our ability to anticipate or respond to interest rate changes correctly and manage interest rate risk presented through unanticipated changes in our interest rate risk position and/or short- and long-term interest rates; changes in trade, monetary and fiscal policies of various governmental bodies and central banks could affect the economic environment in which we operate; our ability to determine accurate values of certain assets and liabilities; adverse developments in securities, public debt, and capital markets, including changes in market liquidity and volatility; unanticipated changes in our liquidity position, including but not limited to our ability to enter the financial markets to manage and respond to any changes to our liquidity position; the impact of the transition from LIBOR and our ability to adequately manage such transition; adequacy of our risk management program; increased competitive pressure due to consolidation in the financial services industry; risks related to security breaches, cybersecurity attacks, and other significant disruptions in our information technology systems; and other risks and factors identified in our most recent annual report on Form 10-K and our other reports filed with or furnished to the Securities and Exchange Commission (“SEC”) from time to time. Statements included in this presentation include non-GAAP financial measures and should be read along with the accompanying tables, which provide a reconciliation of non-GAAP financial measures common to GAAP financial measures. Atlantic Capital management uses non-GAAP financial measures, including:(i) taxable equivalent net interest income, (ii) taxable equivalent net interest margin, (iii) tangible book value per common share, (iv) tangible common equity to tangible assets;(v) pre-provision net revenue, (vi) allowance for credit losses to loans held for investment excluding PPP, and (vii) allowance for loan losses to loans held for investment excluding PPP. Tangible common equity excludes goodwill from shareholders’ equity. Management believes that non-GAAP financial measures provide a greater understanding of ongoing performance and operations, and enhance comparability with prior periods. Non-GAAP financial measures should not be considered as an alternative to any measure of performance or financial condition as determined in accordance with GAAP, and investors should consider Atlantic Capital’s performance and financial condition as reported under GAAP and all other relevant information when assessing the performance or financial condition of the Company. Non-GAAP financial measures have limitations as analytical tools, and investors should not consider them in isolation or as a substitute for analysis of the results or financial condition as reported under GAAP. Non-GAAP financial measures may not be comparable to non-GAAP financial measures presented by other companies. 2

atlanticcapitalbank.com Q2 2021 Overview Performance Highlights Credit Update 3 Atlantic Capital produced another quarter of strong operating results. • Reported net income was $18.6 million or $0.58 per diluted share. • Taxable equivalent revenue increased 34.4% annualized from Q1 2021 and 21.7% year over year. • Loans held for investment, excluding PPP loans, increased 15% annualized on a linked quarter basis and 11% year over year. • Quarterly average deposits increased 19% annualized on a linked quarter basis and 37% year over year. • Cost of deposits decreased to 0.12% compared to 0.16% in the fourth quarter of 2020. • The provision for credit losses was negative $933,000 reflecting an improved economic outlook partially offset by loan growth. • Credit quality improved as criticized loans decreased 22% from the first quarter of 2021. •Annualized net charge-offs remained low at 0.10% of average loans for Q2 2021 and 0.07% for the first six months of 2021. • Nonperforming assets remained loan at 0.14% of total assets at June 30, 2021.

atlanticcapitalbank.com Financial Highlights: Continuing Operations (1) Pre-provision net revenue (PPNR) is calculated as the sum of taxable equivalent net interest income and noninterest income less noninterest expense (except provision for credit losses). Dollars in millions. For a reconciliation of this non-GAAP financial measure, see slides 31-32. (2) Dollars in millions. (3)Taxable equivalent. (4) Amounts are estimates as of June 30, 2021. Please see reconciliation on slides 31-32 for more details. (5) Percentage changes are annualized. Income Balance Sheet(2) METRICS Q1 2021 Q2 2021 Change vs Performance Measures Q2 2020 Q2 2020 Q1 2021(5) Capital Ratios Diluted EPS $ 0.58 $ 0.65 $ 0.09 $ (0.07) (43%) $ 0.49 544% Pre-provision net revenue (PPNR) (1) 14.4 12.1 11.4 2.3 76% 3.0 26% Total loans held for investment (period-end) $ 2,265 $ 2,301 $ 2,185 $ (36) (6%) $ 80 4% Total loans excluding PPP loans 2,159 2,082 1,951 77 15% 208 11% Total deposits (quarterly average) 3,308 3,157 2,410 151 19% 898 37% Non-interest bearing deposits (quarterly average) 1,296 1,137 815 159 56% 481 59% Tangible book value per common share $ 16.40 $ 15.74 $ 14.72 Net interest margin (3) 2.91 % 2.81 % 3.23 % Efficiency ratio 51.97 56.30 53.82 Tangible common equity to tangible assets 8.86 % 8.63 % 11.01 % Leverage ratio (4) 8.4 8.4 9.9 Total risk based capital (4) 16.0 16.4 14.8 (23 bps) (215 bps) (40 bps) 120 bps $1.68 (32 bps) (185 bps) 0 bps (150 bps) (10 bps) (433 bps) $0.66 4

Owner-occupied CRE 17% atlanticcapitalbank.com Commercial Lending Focus $688 $790 $944 $1,063 $1,134 $1,115 $1,160 $622 $605 $653 $686 $681 $693 $745 $176 $203 $184 $61 $62 $80 $73 $65 $71 $70 $144 $192 $219 $106 $1,519 $2,301 Loans from Continuing Operations Loan yield Commercial(1) CRE(2) Consumer Mortgage Warehouse 3.79% 4.27% 5.01% 5.26% 3.89% 3.89% 4.19% $1,515 $1,728 Dollars in millions. Prior periods have been retrospectively adjusted for the impact of discontinued operations. (1) Commercial loans include commercial and industrial and owner occupied CRE loans. (2) CRE loans include non-owner occupied and construction and land. (3) Other loans include residential mortgages, home equity, and other loans. $1,874 12/31/2016 12/31/2017 12/31/2018 12/31/2019 12/31/2020 3/31/2021 6/30/2021 PPP Loan yield excluding PPP loans $2,249 Highlights • Loans held for investment, excluding PPP loans, increased 15% annualized from the first quarter and 11% year-over-year 3.86% 3.83% 3.95% Residential 3% Multifamily 3% Consumer and other 8% PPP 5% C&I 34% Fixed 47% Floating 48% PPP 5% Construction & Land 8% Commercial Real Estate 22% Other(3) 5 $2,265

atlanticcapitalbank.com Strong Core Deposit Franchise 28% 32% 33% 33% 34% 36% 39% 56% 56% 61% 61% 58% 53% 49% 1% 1% 1% 1% 5% 9% 9% 15% 3% 3% 3% 11% 5% $3,157 5% Average Deposits from Continuing Operations Dollars in millions. Deposit figures represent average balances. Prior periods have been retrospectively adjusted for the impact of discontinued operations. DDA NOW, Money Market & Savings Time $1,540 $1,633 Deposit cost $1,419 $1,805 0.28% 0.38% 0.52% 0.77% 0.31% 0.12% 0.10% 2016 2017 2018 2019 2020 Q1 2021 Q2 2021 Brokered Highlights • Continued strong growth in deposits: • Quarterly average deposits increased 19% annualized compared to the first quarter and or 37% year-over-year • Growth in treasury management and processing relationships has resulted in strong DDA growth. • 39% of total deposits • Q2 2021 vs Q2 2020: 59% • Q2 2021 vs Q1 2021: 56% annualized • The cost of interest bearing deposits decreased 0.02% to 0.17% in Q2 2021. $2,504 6 $3,308

atlanticcapitalbank.com Atlanta’s Hometown Business Bank • C&I Banking – Entrepreneurs and emerging growth companies value experienced commercial bankers attuned to clients’ needs. • Commercial Real Estate – Established relationships with experienced developers of institutional grade properties. • Private Banking - Personalized banking service for owners/operators and other private clients. Atlanta Market Highlights Atlanta Loan and Deposit Composition – 6/30/2021 Loans QTD Average Deposits Commercial & Private Banking 87% Commercial & Private Banking 58% Real Estate Banking 40% $1,201 $1,367 Commercial & Private Banking 90% Real Estate Banking 10% Commercial & Private Banking 60% Dollars in millions Focused on commercial clients and individuals that value high touch relationships and expertise Atlanta Loans Atlanta Deposits $731 $785 $885 $948 $1,166 $1,421 $1,367 0.19% 0.19% 0.34% 0.57% 0.23% 0.10% 0.07% 2016 2017 2018 2019 2020 Q1 2021 Q2 2021 Average Deposits Cost of Deposits 7 $870 $943 $1,050 $1,114 $1,114 $1,149 $1,201 3.83% 4.24% 4.98% 5.11% 3.88% 3.55% 3.55% Loans Yield on loans 12/31/16 12/31/17 12/31/18 12/31/19 12/31/20 3/31/21 6/30/21

atlanticcapitalbank.com Rapidly Growing Fintech & Payments Businesses • Powering fintech and payments companies across the US • Rapidly growing recurring revenue stream • Top 40 ACH Bank in the US(1) • Diversified platform of capabilities • High volume ACH • Fintech partnerships • Card issuance (focused on debit & prepaid) • Private Equity banking Average Deposits – Payments & Processing Businesses ($ in millions) Loans ($ in millions) Highlights Service Charge Income ($ in thousands) $906 $1,243 $1,529 $1,977 $3,438 $1,556 $2,624 2016 2017 2018 2019 2020 YTD 2020 YTD 2021 $224 $283 $322 $421 $661 $1,068 0.32% 0.40% 0.52% 0.66% 0.19% 0.06% 2016 2017 2018 2019 2020 YTD 2021 Deposits Cost of Deposits (1)by National Automated Clearing House Association (NACHA) 8 $31 $37 $46 $64 $243 $252 $267 4.14% 4.54% 5.23% 5.30% 3.35% 2.99% 3.27% Loans Yield on loans 12/31/16 12/31/17 12/31/18 12/31/19 12/31/20 3/31/21 6/30/21

atlanticcapitalbank.com Financial Update: Q2 2021 Income Summary Net interest income(1) 26,035 $ 23,710 $ 21,985 $ 18% Provision for credit losses (933) (4,519) 8,863 -111% Noninterest income 3,584 3,562 2,343 53% Noninterest expense 15,197 15,149 12,904 18% Income before taxes 15,355 16,642 2,561 500% Income tax expense 3,539 3,280 712 397% Net income from continuing operations 11,816 $ 13,362 $ 1,849 $ 539% Diluted EPS - continuing operations 0.58 $ 0.65 $ 0.09 $ 544% Pre-provision net revenue (PPNR)(2) 14,422 $ 12,123 $ 11,424 $ 26% Q2 2020 Q1 2021 Q2 2021 Q2 2021 Highlights(3) Dollars in thousands except EPS. (1)Net interest income is taxable equivalent and a non-GAAP financial measure. Please see reconciliation on slides 31-32 for more details. (2) Pre-provision net revenue (PPNR) is calculated as the sum of taxable equivalent net interest income and noninterest income less noninterest expense (except provision for credit losses). Dollars in thousands. For a reconciliation of this non-GAAP financial measure, see slides 31-32. (3)Q1 2021 results compared to Q4 2020 results. Change vs Q2 20 9 • Net interest income benefitted from strong balance sheet growth along with income from PPP loans. • Reversal of allowance for credit losses was due to improved forecasts partially offset by loan growth. • Noninterest income increased from higher service charge income and an increase in SBA income. • Higher expenses due to increase in personnel expenses.

atlanticcapitalbank.com Balance Sheet Liquidity Average Loan / Deposit Ratio 88% 89% 77% 72% 68% Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 Average Interest Bearing Deposits in Other Banks $129,989 $136,459 $435,939 $561,809 $687,795 Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 • Atlantic Capital’s liquidity position remains strong benefitting from continued deposit growth across most lines of business. • Liquidity is expected to remain strong in 2021 even as deposit growth is anticipated to moderate. 10 Dollars in thousands

atlanticcapitalbank.com Net Interest Margin NIM by Quarter(1) Net Interest Income by Quarter(1) Dollars in thousands Income and margin from continuing operations (1)Net interest income and net interest margin are taxable equivalent and are non-GAAP financial measures. Taxable equivalent net interest income is used in calculating taxable equivalent net interest margin. Please see reconciliation on slides 31-32 for more details. Net interest margin Net interest margin adjusted for excess cash Net interest income (excl. PPP) PPP interest income 3.23% 3.14% 2.91% 2.81% 2.91% 3.14% 3.18% 3.17% 3.39% Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 3.23% 11 $21,289 $20,475 $20,685 $21,492 $23,065 $696 $1,588 $2,304 $2,218 $2,970 Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 $22,063 $22,989 $26,035 $21,985 $23,710 • Excess cash balances from strong deposit growth negatively impacting the net interest margin. • The impact of PPP loan forgiveness benefitted the net interest margin by 21 bps in Q2 2021 and 11 bps in Q1 2021. • Q2 2021 included $671,000 in interest income related to an investment prepayment penalty and the accelerated accretion of a loan discount upon payoff.

atlanticcapitalbank.com Noninterest Expense Overview Dollars in thousands (1) Continuing operations Noninterest Expense and Efficiency Ratio by Year(1) Noninterest Expense $50,099 $52,834 $49,991 $53,108 $52,659 76.3% 70.4% 57.9% 58.0% 54.1% 2016 2017 2018 2019 2020 Q2 2021 Q1 2021 Q2 2020 Salaries and employee benefits 10,362 $ 10,421 $ 8,466 $ 1,896 $ 22% Occupancy 778 734 883 (105) (12%) Equipment and software 819 774 763 56 7% Professional services 723 922 792 (69) (9%) Communications and data processing 869 792 670 199 30% FDIC 421 275 175 246 Other noninterest expense 1,225 1,231 1,155 70 6% Noninterest expense 15,197 $ 15,149 $ 12,904 $ 2,293 $ 18% Year-over-Year change Noninterest Expense and Efficiency Ratio by Quarter $12,904 $13,713 $13,164 $15,149 $15,197 53.8% 56.6% 51.3% 56.3% 52.0% Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 Noninterest Expense Efficiency Ratio 12 Q2 2021 Highlights • Higher incentive accruals and increased SBA commissions in Q2 were primarily offset by lower payroll taxes. • Professional services in Q1 2021 included approximately $200,000 in PPP expenses.

atlanticcapitalbank.com Strong Capital Position (1)For a reconciliation of this non-GAAP financial measure, see slides 31-32. (2)Amounts are estimates as of June 30, 2021 • Capital levels remained strong but were impacted by the increase in deposits and corresponding increase in the size of the balance sheet. • Reduced TCE and Tier 1 Leverage Ratios. • Share repurchase program update: • Repurchased 50,000 shares totaling $1.3 million at an average price of $25.71 in Q2 2021. • $1.8 million of the $25 million program remaining. Highlights 14.8% 16.9% 16.1% 16.4% 16.0% 6/30/2020 9/30/2020 12/31/2020 3/31/2021 6/30/2021 Total Risk Based Capital Ratio(2) 9.9% 9.9% 8.9% 8.4% 8.4% 6/30/2020 9/30/2020 12/31/2020 3/31/2021 6/30/2021 11.0% 11.0% 8.9% 8.6% 8.9% 6/30/2020 9/30/2020 12/31/2020 3/31/2021 6/30/2021 Tangible Common Equity Ratio(1) Tier 1 Leverage Ratio(2) 13

atlanticcapitalbank.com Strong Historical Credit Quality Non-performing Assets / Total Assets Net Charge-Offs / Total Average Loans (0.01%) 0.05% 0.11% 0.23% 0.02% 0.11% 0.11% 0.04% 0.10% 2014 2015 2016 2017 2018 2019 2020 Q1 2021 Q2 2021 0.12% 0.40% 0.13% 0.14% 0.20% 0.26% 0.13% 0.06% 0.14% Highlights Classified Loans / Total Loans 1.40% 0.66% 1.68% 1.76% 2.10% 1.99% 3.25% 2.10% 2.26% 12/31/14 12/31/15 12/31/16 12/31/17 12/31/18 12/31/19 12/31/20 3/31/21 6/30/21 • Overall credit quality remained solid with limited charge-offs and non- accruals. • Criticized loans decreased 22% from 3/31/2021 primarily due to upgrades. • Classified loans increased from 2.1% of total loans as of 3/31/2021 to 2.3% as of 6/30/2021. • Allowance for credit losses decreased from 1.45% of loans excluding PPP to 1.33%. • Net charge-offs were 0.10% annualized, non-performing assets remain low at 0.14% of totals assets. 14 12/31/14 12/31/15 12/31/16 12/31/17 12/31/18 12/31/19 12/31/20 3/31/21 6/30/21

atlanticcapitalbank.com Current Expected Credit Losses (CECL) $19,848 $27,734 $35,085 $34,765 $34,946 $30,189 $28,689 1.06% 1.43% 1.80% 1.78% 1.70% 1.45% 1.33% 1.43% 1.61% 1.59% 1.55% 1.31% 1.27% Day 1 3/31/20 6/30/20 9/30/20 12/31/20 3/31/21 6/30/21 Allowance for Credit Losses (ACL) Allowance for Loan Losses (ALL) ACL/Loans HFI excluding PPP(1) ACL/Loans HFI ALL/Loans HFI excluding PPP(1) ALL/Loans HFI $17,681 $24,896 $31,605 $31,894 $31,818 $27,506 $26,123 0.94% 1.29% 1.62% 1.63% 1.55% 1.32% 1.21% 1.29% 1.45% 1.46% 1.41% 1.20% 1.15% Day 1 3/31/20 6/30/20 9/30/20 12/31/20 3/31/21 6/30/21 ACL ALL Dollars in thousands (1)For a reconciliation of this non-GAAP financial measure, see slides 31-32. • Reversal of allowance for credit losses was due to improved forecasts partially offset by loan growth. • ACL remains robust at 1.27% of loans (1.33% excluding PPP loans). 15

atlanticcapitalbank.com Hotel Portfolio • $112 million outstanding net of SBA/USDA guaranteed portions as of 6/30/2021 • Weighted average original LTV 66% • Average occupancy has increased to above 60% from 49% in February 2021 • $16 million special mention, $1 million classified, $0 non- accrual Hotel Loans by State Hotel Portfolio Highlights Hotel Loans by Type Hotel Loans by Brand CRE $67MM, 51% SBA 504 $39MM, 29% SBA guaranteed $22MM, 16% SBA unguaranteed $6MM, 4% Hilton $38MM, 28% Marriott $41MM, 30% Hyatt $21MM, 16% InterContinental $22MM, 17% Other $12MM, 9% GA $42MM, 31% SC $20MM, 15% TN $53MM, 40% FL $14MM, 10% NC $4MM, 3% Other $1MM, 1% Excludes PPP loans 16

atlanticcapitalbank.com Restaurant Portfolio Restaurant Loans by State Restaurant Portfolio Highlights Restaurant Loans by Concept Restaurant Loans by Type • $196 million outstanding as of 6/30/2021 • 94% QSR; Dunkin’ 42% of QSR • $16 million special mention, $3 million classified, $0 non- accrual • 6% full service – no classified or non-accrual GA $59MM, 31% FL $35MM, 18% NJ $17M, 9% IL $13M, 6% TX $9MM, 4% MO $8MM, 4% NC $8MM, 4% MD $7M, 4% VA $6M, 3% Other $34MM, 17% Dunkin’ $78MM, 40% Other QSR $105MM, 54% Full service $13MM, 6% SNC $8MM, 4% Franchise finance $162MM, 83% C&I $4MM, 2% CRE $9MM, 4% SBA $9MM, 5% TriNet $4MM, 2% Excludes PPP loans 17

atlanticcapitalbank.com Paycheck Protection Program (PPP) Update Dollars in thousands • $2.9 million in fees still to be recognized • 537 PPP loans totaling $113 million forgiven during the second quarter 18 Ending Balances and Total Yield Interest and Fee Income $234,049 $231,834 $192,160 $218,766 $105,684 1.52% 2.71% 4.22% 4.46% 7.29% 6/30/2020 9/30/2020 12/31/2020 3/31/2021 6/30/2021 $696 $1,589 $2,304 $2,218 $2,970 Q2 2020 Q3 2020 Q4 2020 Q1 2021 Q2 2021 PPP Interest and Fee income PPP Ending Balances PPP Total Yield

Appendix

atlanticcapitalbank.com Management Biographies Douglas Williams President and Chief Executive Officer • President and CEO of Atlantic Capital since its inception • Former Managing Director and Head of Wachovia Corporation’s International Corporate Finance Group • Held numerous roles within Wachovia, including EVP and Head of the Global Corporate Banking Division; CRO for all corporate, institutional, and wholesale banking activities; EVP and Co-Head of Wachovia’s Capital Markets Division and EVP and Head of Wachovia’s US Corporate Banking Division • Former chairman of the Community Depository Institutions Advisory Council (CDIAC) of the Federal Reserve Bank of Atlanta and its representative to the CDIAC of the Federal Reserve Board of Governors • Serves on the Boards of the Metro Atlanta Chamber of Commerce and the Georgia Chamber of Commerce, is a Member of the Buckhead Coalition, and former member of YMCA of Metropolitan Atlanta and the High Museum of Art boards • President, Atlanta Division of Atlantic Capital since December 2019 • EVP, General Banking Division Executive of Atlantic Capital from 2017 through 2019 • CRO of Atlantic Capital from its inception through 2017 • Former Chief Credit Officer for Wachovia’s Capital Finance business • Former Head of Risk Management for all of Wachovia’s Capital Markets business • Serves on the Board of Trustees at Children’s Literature for Children • CFO of Atlantic Capital since NASDAQ listing in 2015 • Former CFO of Square 1 Financial, Inc. • Former EVP and CFO of Encore Bancshares, Inc. • Former SVP and Treasurer of Sterling Bancshares, Inc. • Chartered Financial Analyst • EVP and CRO of Atlantic Capital since October 2017 • Senior Risk Management Officer at Atlantic Capital from inception • Former Director in Wachovia’s Risk Management Division supporting Corporate, Investment Banking and Capital Markets groups • Former Client Management and Risk Management Officer in Wachovia’s middle market commercial group in North Carolina Gray Fleming Executive Vice President, Chief Risk Officer • President, Corporate Financial Services Division since December 2019 • EVP at Atlantic Capital from inception through December 2019 • Former Managing Director and Group Head for Wachovia Securities’ Continental European Group • Member of TWIN (The World Innovation Network – Chicago), Fiserv’s Commercial Payments Advisory Board and a former executive in residence at Juniata College in Pennsylvania Kurt Shreiner President, Corporate Financial Services Division Patrick Oakes, CFA Executive Vice President, Chief Financial Officer Rich Oglesby President, Atlanta Division 20

atlanticcapitalbank.com Atlanta’s Hometown Business Bank • Proven underwriting; superior credit quality • Lead with strong risk and compliance • Strong capital • Capitalize on Atlanta market opportunities • Fintech and processing businesses • Core deposit strength Fundamentally Sound Positioned for Growth TOTAL ASSETS $3.8 Billion • Atlanta’s Hometown BUSINESS BANK • Fast growing FINTECH & PAYMENTS businesses • EMERGING GROWTH and ENTREPRENEURIAL focus • Continued INVESTMENT IN TECHNOLOGY 21

atlanticcapitalbank.com Atlanta’s Hometown Business Bank Atlanta metro highlights: •#1 for economic growth potential (among large metro areas) • 16 Fortune 500 headquarters •#1 world’s busiest airport •#4 metro area for largest increase in population (2018-2019) •#2 moving destination • 70% of all US payments are processed through Georgia Sources: Metro Atlanta Chamber, City Data, Penske and American Transaction Processors Coalition Atlanta MSA GDP $200 $250 $300 $350 $400 2013 2014 2015 2016 2017 2018 2019 Billions 22

atlanticcapitalbank.com Investment Portfolio Portfolio Yield Tax-exempt Municipal 33% Taxable Municipal 11% MBS 45% Agency CMO 6% Corporate 4% CDs 1% Sector Allocation at 6/30/2021 1.73% 2.25% 2.48% 2.69% 2.88% 2.61% 2016 2017 2018 2019 2020 Q2 2021 Municipal Bond Ratings 6/30/2021 AAA 43% AA+ 22% AA 30% AA- 4% Other 1% Portfolio Balance $348 $449 $402 $399 $536 $714 Extended portfolio duration to manage interest rate risk 12/31/16 12/31/17 12/31/18 12/31/19 12/31/20 6/30/21 23 $s in millions

atlanticcapitalbank.com Summary of Loan Portfolio Borrowers by State(2) Highlights C&I Concentrations(1) (2) CRE Concentrations by Property Type(1) GA $1,275MM, 74% TN $98MM, 6% FL $87MM, 5% TX $25MM, 2% PA $25MM, 1% Other $211MM, 12% (GA 81% excluding SBA and Franchise) (1) Commercial includes commercial and industrial, owner-occupied CRE; CRE includes non-owner occupied CRE, multifamily, construction (2) Excludes Trinet, PPP, and fintech partnership consumer loans Office $145MM, 19% Retail $142MM, 19% Hotel $125MM, 17% Industrial $125MM, 17% Multi-family $82MM, 11% Specialty Housing $50MM, 7% Other $76MM, 10% Restaurants and food $188MM, 16% Retail $151MM, 13% Manufacturing $133MM, 12% Wholesale $127MM, 11% Finance and insurance $91MM, 8% Transportation $71MM, 6% Other $222MM, 19% Real estate lessors $47MM, 4% Other construction $71MM, 6% • $2.3 billion in total loans as of 6/30/2021 • Includes $106 million of PPP loans • Commercial focused loan portfolio • 89% commercial and CRE(1) • Concentrated in the Southeast • Granular portfolio 24 Administrative support $59MM, 5%

atlanticcapitalbank.com Loan Portfolio by Risk Rating Pass Special Mention Substandard Doubtful Total Pass Special Mention Substandard Doubtful Total Commercial - commercial and industrial 818,155 $ 38,319 $ 16,856 $ - $ 873,330 $ 872,952 $ 66,813 $ 14,288 $ - $ 954,053 $ Commercial - commercial real estate 893,938 30,454 32,578 - 956,970 869,903 38,739 33,449 - 942,091 Commercial - construction and land 176,403 4,094 - - 180,497 138,354 4,442 - - 142,796 Residential - mortgages 43,767 1,414 26 - 45,207 30,180 1,432 205 - 31,817 Residential - home equity 24,047 726 199 - 24,972 25,567 726 - - 26,293 Consumer 184,203 - - - 184,203 203,176 - - - 203,176 Other 3,641 — 1,593 - 5,234 6,320 914 455 - 7,689 Total 2,144,154 $ 75,007 $ 51,252 $ - $ 2,270,413 $ 2,146,452 $ 113,066 $ 48,397 $ - $ 2,307,915 $ Less net deferred fees and other unearned income (5,514) (7,101) Total loans held for investment 2,264,899 $ 2,300,814 $ Q2 2021 Q1 2021 25

atlanticcapitalbank.com Shared National Credit Portfolio SNC Portfolio Highlights SNC Portfolio by Industry • $173 million outstanding as of 6/30/2021 • Average commitment $12 million • 19% highly leveraged transactions (outstandings) • $15 million special mention, no classified, no non-accrual Other $10MM, 7% Landscaping services $21MM, 11% Aluminum extruded product mfg. $19MM 11% Continuing care retirement services $13MM, 8% Air cargo $11MM, 6% Commercial printing $10MM, 6% General medical and surgical hospitals $10MM, 6% Ready-mix concrete manufacturing $9MM, 5% Limited service restaurants $8MM, 5% Sporting goods stores $8MM, 5% Other airport operations $6MM, 4% Paint/varnish supplies merchant wholesalers $11MM, 6% SNC Loans by State GA $58MM, 34% TN $38MM, 22% FL $24MM, 14% PA $20MM, 11% MO $17MM, 10% TX $6MM, 3% NC $5MM, 3% AL $5MM 3% Electronic computer manufacturing $6MM, 3% Cut and sew apparel contractors $5MM, 3% Wine and distilled alcoholic beverage merchant wholesalers $4MM, 2% Direct life insurance carriers $4MM, 2% Gasoline stations with convenience stores $18MM, 10% 26

face="Arial" style="color:white;font-size:1.0pt;">atlanticcapitalbank.com share data) Jun. 30, Mar. 31, Dec. 31, Jun. 30, 35,530 $ 32,850 $ 16,865 $ 33,759 593,195 612,966 636,537 33,038 628,725 645,816 653,402 66,797 available for sale 480,518 390,701 335,423 271,829 held to maturity, net of allowance for credit losses of $13, $14, $14, 2021, March 31, 2021, December 31, 2020 and June 30, 2020, 222,535 200,156 185,920 24,293 24,709 25,892 28,811 – 1,847 – 1,153 2,264,899 2,300,814 2,249,036 2,184,694 (26,123) (27,506) (31,818) (31,605) 2,238,776 2,273,308 2,217,218 2,153,089 19,643 20,633 21,589 22,494 73,610 73,223 72,856 67,127 19,925 19,925 19,925 2,637 2,688 2,731 2,731 16 16 16 779 57,267 66,409 69,967 3,732,668 $ 3,615,617 $ 2,890,622 1,374,018 $ 1,280,524 $ 1,033,765 $ 883,662 536,677 485,540 760,638 449,737 562 625 583 1,142,361 1,030,753 879,863 294,129 241,328 131,353 84,958 74,576 94,399 62,433 3,277,692 3,161,508 2,407,631 6,000 – – – 50,000 73,953 73,878 73,807 49,958 47,083 40,770 41,716 41,053 3,427,260 3,392,340 3,277,031 2,554,642 par value; 10,000,000 shares authorized; no shares issued and June 30, 2021, March 31, 2021, December 31, 2020 and June 30, – – – 207,047 209,942 224,520 139,315 127,499 114,137 95,570 7,251 5,782 14,507 15,890 353,185 340,328 338,586 335,980 AND SHAREHOLDERS' EQUITY $ 3,780,445 $ 3,732,668 $ 3,615,617 $ 2,890,622 value; 100,000,000 shares authorized; 20,319,429, 20,354,077, shares issued and outstanding as of June 30, 2021, March 31, 2020, and June 30, 2020, respectively

atlanticcapitalbank.com Period End Loans (dollars in thousands) June 30, 2021 March 31, 2021 December 31, 2020 September 30, 2020 June 30, 2020 Loans held for sale Loans held for sale $ - $ 1,847 $ - $ 859 $ 1,153 $ (1,847) $ (1,153) Loans held for sale - discontinued operations - - - - - - - Total loans held for sale $ - $ 1,847 $ - $ 859 $ 1,153 $ (1,847) $ (1,153) 0 0 Loans held for investment Commercial loans: Commercial and industrial - other $ 767,646 $ 735,287 $ 760,645 $ 712,567 $ 739,769 $ 32,359 $ 27,877 Commercial and industrial - PPP 105,684 218,766 192,160 231,834 234,049 (113,082) (128,365) Commercial real estate: - - Multifamily 58,632 80,507 66,262 58,336 58,909 (21,875) (277) Owner occupied 392,108 381,018 373,689 364,170 366,847 11,090 25,261 Investment 506,230 480,566 469,150 458,279 474,565 25,664 31,665 Construction and land: - - 1-4 family residential construction 2,074 1,578 1,171 - 11 496 2,063 Other construction, development, and land 178,423 141,218 144,424 139,836 128,980 37,205 49,443 Mortgage warehouse loans - - - - - - - Total commercial loans 2,010,797 2,038,940 2,007,501 1,965,022 2,003,130 (28,143) 7,667 Residential: Residential mortgages 45,207 31,817 33,783 29,460 32,327 13,390 12,880 Home equity 24,972 26,293 25,443 24,528 23,689 (1,321) 1,283 Total residential loans 70,179 58,110 59,226 53,988 56,016 12,069 14,163 - - Consumer 184,203 203,176 176,066 154,916 113,149 (18,973) 71,054 Other 5,234 7,689 13,897 22,777 22,160 (2,455) (16,926) 2,270,413 2,307,915 2,256,690 2,196,703 2,194,455 (37,502) 75,958 Less net deferred fees and other unearned income (5,514) (7,101) (7,654) (8,668) (9,761) 1,587 4,247 Total loans held for investment $ 2,264,899 $ 2,300,814 $ 2,249,036 $ 2,188,035 $ 2,184,694 $ (35,915) $ 80,205 Total loans $ 2,264,899 $ 2,302,661 $ 2,249,036 $ 2,188,894 $ 2,185,847 $ (37,762) $ 79,052 Total unfunded commitments $ 804,758 $ 789,869 $ 813,757 $ 764,247 $ 749,321 $ 14,889 $ 55,437 Linked Quarter Change Year Over Year Change 28

atlanticcapitalbank.com Deposits: Period End and Average Period End Deposits (dollars in thousands) June 30, 2021 March 31, 2021 December 31, 2020 September 30, 2020 June 30, 2020 Linked Quarter Change Year Over Year Change DDA $ 1,374,018 $ 1,280,524 $ 1,033,765 $ 843,656 $ 883,662 $ 93,494 $ 490,356 NOW 536,677 485,540 760,638 387,858 449,737 51,137 86,940 Savings 676 562 625 568 583 114 93 Money market 1,026,239 1,142,361 1,030,753 945,834 879,863 (116,122) 146,376 Time 283,656 294,129 241,328 196,343 131,353 (10,473) 152,303 Brokered 84,958 74,576 94,399 94,463 62,433 10,382 22,525 Total deposits $ 3,306,224 $ 3,277,692 $ 3,161,508 $ 2,468,722 $ 2,407,631 $ 28,532 $ 898,593 Average Deposits Linked (dollars in thousands) Second Quarter First Quarter Fourth Quarter Third Quarter Second Quarter Quarter Change DDA $ 1,295,728 $ 1,136,531 $ 977,009 $ 854,715 $ 815,299 $ 159,197 $ 480,429 NOW 548,358 618,701 558,967 440,734 462,051 (70,343) 86,307 Savings 593 587 614 586 574 6 19 Money market 1,088,423 1,042,809 1,026,347 942,062 952,444 45,614 135,979 Time 290,331 273,615 221,792 166,019 96,362 16,716 193,969 Brokered 84,168 84,663 89,673 68,102 83,228 (495) 940 Total deposits $ 3,307,601 $ 3,156,906 $ 2,874,402 $ 2,472,218 $ 2,409,958 $ 150,695 $ 897,643 Noninterest bearing deposits as a percentage of average deposits 39.2% 36.0% 34.0% 34.6% 33.8% Cost of interest-bearing deposits 0.17% 0.19% 0.25% 0.28% 0.33% Cost of deposits 0.10% 0.12% 0.16% 0.19% 0.22% 2021 2020 Q2 2021 vs Q2 2020 29

atlanticcapitalbank.com Income Statements (in thousands except share and per share data) June 30, 2021 March 31, 2021 December 31, 2020 September 30, 2020 June 30, 2020 Total interest income $ 27,618 $ 25,410 $ 24,943 $ 24,233 $ 23,797 Total interest expense 1,958 2,065 2,299 2,515 2,166 NET INTEREST INCOME BEFORE PROVISION FOR LOAN LOSSES 25,660 23,345 22,644 21,718 21,631 Provision for credit losses (933) (4,519) 481 28 8,863 NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES 26,593 27,864 22,163 21,690 12,768 NONINTEREST INCOME Service charges 1,727 1,663 1,341 1,217 1,081 Gains (losses) on sale of securities – 2 (23) – – Gains (losses) on sale of other assets – – (6) (145) – Derivatives income (loss) (7) 47 11 10 (10) Bank owned life insurance 388 391 368 363 367 SBA lending activities 1,231 1,225 1,015 893 782 Other noninterest income 245 234 310 166 123 Total noninterest income 3,584 3,562 3,016 2,504 2,343 NONINTEREST EXPENSE Salaries and employee benefits 10,362 10,421 8,437 8,850 8,466 Occupancy 778 734 767 739 883 Equipment and software 819 774 969 826 763 Professional services 723 922 686 562 792 Communications and data processing 869 792 789 757 670 Marketing and business development 138 108 144 141 79 Travel, meals and entertainment 47 10 14 39 34 FDIC premiums 421 275 241 213 175 Other noninterest expense 1,040 1,113 1,117 1,586 1,042 Total noninterest expense 15,197 15,149 13,164 13,713 12,904 INCOME BEFORE PROVISION FOR INCOME TAXES 14,980 16,277 12,015 10,481 2,207 Provision for income taxes 3,164 2,915 2,065 1,863 358 NET INCOME 11,816 13,362 9,950 8,618 1,849 Net income per common share - basic $ 0.58 $ 0.66 $ 0.48 $ 0.40 $ 0.09 Net income per common share - diluted $ 0.58 $ 0.65 $ 0.48 $ 0.40 $ 0.09 Weighted average shares - basic 20,332,503 20,380,066 20,711,089 21,500,735 21,472,462 Weighted average shares - diluted 20,516,478 20,502,184 20,795,332 21,543,805 21,535,040 Three months ended 30

atlanticcapitalbank.com Non-GAAP Financial Measures (in thousands, except share and per share data) Second Quarter First Quarter Fourth Quarter Third Quarter Second Quarter Taxable equivalent net interest income reconciliation Net interest income - GAAP $ 25,660 $ 23,345 $ 22,644 $ 21,718 $ 21,631 Taxable equivalent adjustment 375 365 345 345 354 Net interest income - taxable equivalent $ 26,035 $ 23,710 $ 22,989 $ 22,063 $ 21,985 Taxable equivalent net interest margin reconciliation Net interest margin - GAAP - continuing operations 2.87% 2.76% 2.86% 3.09% 3.17% Impact of taxable equivalent adjustment 0.04% 0.05% 0.05% 0.05% 0.06% Net interest margin - taxable equivalent - continuing operations 2.91% 2.81% 2.91% 3.14% 3.23% Tangible book value per common share reconciliation Total shareholders’ equity $ 353,185 $ 340,328 $ 338,586 $ 340,309 $ 335,980 Intangible assets (19,925) (19,925) (19,925) (19,925) (19,925) Total tangible common equity $ 333,260 $ 320,403 $ 318,661 $ 320,384 $ 316,055 Common shares outstanding 20,319,429 20,354,077 20,394,912 21,202,783 21,477,631 Book value per common share - GAAP $ 17.38 $ 16.72 $ 16.60 $ 16.05 $ 15.64 Tangible book value 16.40 15.74 15.62 15.11 14.72 Tangible common equity to tangible assets reconciliation Total shareholders’ equity $ 353,185 $ 340,328 $ 338,586 $ 340,309 $ 335,980 Intangible assets (19,925) (19,925) (19,925) (19,925) (19,925) Total tangible common equity $ 333,260 $ 320,403 $ 318,661 $ 320,384 $ 316,055 Total assets $ 3,780,445 $ 3,732,668 $ 3,615,617 $ 2,923,977 $ 2,890,622 Intangible assets (19,925) (19,925) (19,925) (19,925) (19,925) Total tangible assets $ 3,760,520 $ 3,712,743 $ 3,595,692 $ 2,904,052 $ 2,870,697 Tangible common equity to tangible assets 8.86% 8.63% 8.86% 11.03% 11.01% PPP loans $ 105,684 $ 218,766 $ 192,160 $ 231,834 $ 234,049 Total tangible assets excl PPP loans $ 3,654,836 $ 3,493,977 $ 3,403,532 $ 2,672,218 $ 2,636,648 Tangible common equity to tangible assets excl PPP loans 9.12% 9.17% 9.36% 11.99% 11.99% Pre-provision net revenue (PPNR) reconciliation Net interest income - GAAP $ 25,660 $ 23,345 $ 22,644 $ 21,718 $ 21,631 Taxable equivalent adjustment 375 365 345 345 354 Noninterest income 3,584 3,562 3,016 2,504 2,343 Noninterest expense (15,197) (15,149) (13,164) (13,713) (12,904) Pre-provision net revenue 14,422 $ 12,123 $ 12,841 $ 10,854 $ 11,424 $ 2020 2021 31

atlanticcapitalbank.com Non-GAAP Financial Measures (in thousands, except share and per share data) Second Quarter First Quarter Fourth Quarter Third Quarter Second Quarter Allowance for credit losses to loans held for investment reconciliation Total loans held for investment $ 2,264,899 $ 2,300,814 $ 2,249,036 $ 2,188,035 $ 2,184,694 PPP Loans (105,684) (218,766) (192,160) (231,834) (234,049) Total loans held for investment excluding PPP $ 2,159,215 $ 2,082,048 $ 2,056,876 $ 1,956,201 $ 1,950,645 Allowance for credit losses to loans held for investment 1.27% 1.31% 1.55% 1.59% 1.61% Allowance for credit losses to loans held for investment excluding PPP loans 1.33% 1.45% 1.70% 1.78% 1.80% Allowance for loan losses to loans held for investment reconciliation Total loans held for investment $ 2,264,899 $ 2,300,814 $ 2,249,036 $ 2,188,035 $ 2,184,694 PPP Loans (105,684) (218,766) (192,160) (231,834) (234,049) Total loans held for investment excluding PPP $ 2,159,215 $ 2,082,048 $ 2,056,876 $ 1,956,201 $ 1,950,645 Allowance for loan losses to loans held for investment 1.15% 1.20% 1.41% 1.46% 1.45% Allowance for loan losses to loans held for investment excluding PPP loans 1.21% 1.32% 1.55% 1.63% 1.62% Net interest margin adjusted for excess cash Total interest-earning assets $ 3,590,139 $ 3,424,717 $ 3,147,728 $ 2,795,994 $ 2,741,528 Excess cash (529,732) (404,959) (285,693) - - Adjusted total interest earning assets 3,060,407 3,019,758 2,862,035 2,795,994 2,741,528 Net interest income - taxable equivalent $ 26,035 $ 23,710 $ 22,989 $ 22,063 $ 21,985 Excess net interest income (132) (100) (72) - - Adjusted net interest income - taxable equivalent 25,903 23,610 22,917 22,063 21,985 Net interest margin adjust for excess cash 3.39% 3.17% 3.18% 3.14% 3.23% 2021 2020 (in thousands) 2020 2019 2018 2017 2016 Net interest income reconciliation Net interest income - GAAP $ 86,973 $ 80,864 $ 76,247 $ 62,832 $ 53,719 Taxable equivalent adjustment 1,478 459 395 906 484 Net interest income - taxable equivalent $ 88,451 $ 81,323 $ 76,642 $ 63,738 $ 54,203 Taxable equivalent net interest margin reconciliation Net interest margin - GAAP - continuing operations 3.11% 3.52% 3.48% 3.03% 2.74% Impact of taxable equivalent adjustment 0.05% 0.06% 0.02% 0.04% 0.02% Net interest margin - taxable equivalent 3.16% 3.58% 3.50% 3.07% 2.76% For the Years Ended December 31, 32

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