Issuer Free Writing Prospectus Filed Pursuant to Rule 433 Registration Statement No. 333-236018 August 17, 2020 DISCUSSION MATERIALS PREFERRED EQUITY OFFERING INVESTOR PRESENTATION AUGUST 2020Issuer Free Writing Prospectus Filed Pursuant to Rule 433 Registration Statement No. 333-236018 August 17, 2020 DISCUSSION MATERIALS PREFERRED EQUITY OFFERING INVESTOR PRESENTATION AUGUST 2020

CERTAIN IMPORTANT INFORMATION CERTAIN IMPORTANT INFORMATION This presentation has been prepared by CNB Financial Corporation (the “Company” or “CNB”) solely for information purposes based on its own information, as well as information from public sources. This presentation is a summary only and has been prepared to assist interested parties in marking their own evaluation of the Company. The Company is not making any implied or express representation or warranty as to the accuracy or completeness of the information contained herein. Except as otherwise indicated, this presentation speaks as of the date hereof. This presentation does not purport to contain all of the information that may be relevant or material to an interested party’s investment decision. In all cases, interested parties should conduct their own investigation and analysis of the Company, including the information included or incorporated by reference into the registration statement and related prospectus supplement for the offering to which this presentation relates. This presentation is neither an offer to sell nor a solicitation of an offer to purchase any securities of the Company. There will be no sale of securities in any jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Any offer to sell or solicitation of an offer to purchase securities of the Company will be made only pursuant to the preliminary prospectus supplement and accompanying prospectus filed with the Securities and Exchange Commission (the “SEC”). The Company has filed a registration statement (including a prospectus) and a preliminary prospectus supplement with the SEC for the offering to which this presentation relates. Before you invest, you should read the prospectus in that registration statement, the related prospectus supplement and other documents the Company has filed with the SEC that are incorporated by reference into the prospectus supplement for more complete information about the Company and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the Company, any underwriter or any dealer participating in the offering will arrange to send you the prospectus supplement if you request it by calling Janney Montgomery Scott LLC at 404-601-7200. 2CERTAIN IMPORTANT INFORMATION CERTAIN IMPORTANT INFORMATION This presentation has been prepared by CNB Financial Corporation (the “Company” or “CNB”) solely for information purposes based on its own information, as well as information from public sources. This presentation is a summary only and has been prepared to assist interested parties in marking their own evaluation of the Company. The Company is not making any implied or express representation or warranty as to the accuracy or completeness of the information contained herein. Except as otherwise indicated, this presentation speaks as of the date hereof. This presentation does not purport to contain all of the information that may be relevant or material to an interested party’s investment decision. In all cases, interested parties should conduct their own investigation and analysis of the Company, including the information included or incorporated by reference into the registration statement and related prospectus supplement for the offering to which this presentation relates. This presentation is neither an offer to sell nor a solicitation of an offer to purchase any securities of the Company. There will be no sale of securities in any jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Any offer to sell or solicitation of an offer to purchase securities of the Company will be made only pursuant to the preliminary prospectus supplement and accompanying prospectus filed with the Securities and Exchange Commission (the “SEC”). The Company has filed a registration statement (including a prospectus) and a preliminary prospectus supplement with the SEC for the offering to which this presentation relates. Before you invest, you should read the prospectus in that registration statement, the related prospectus supplement and other documents the Company has filed with the SEC that are incorporated by reference into the prospectus supplement for more complete information about the Company and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the Company, any underwriter or any dealer participating in the offering will arrange to send you the prospectus supplement if you request it by calling Janney Montgomery Scott LLC at 404-601-7200. 2

CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that relate to future events or the future performance of CNB Financial Corporation (the “Company”). Forward-looking statements are not guarantees of performance or results. These forward-looking statements are based on the current beliefs and expectations of the respective management of the Company and are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond their respective control and which may be heightened by the novel coronavirus, or COVID-19 pandemic. In addition, these forward-looking statements are subject to assumptions with respect to future business strategies and decisions that are subject to change. Actual results may differ materially from the anticipated results discussed or implied in these forward-looking statements because of numerous possible uncertainties. Words like may, plan, contemplate, anticipate, believe, intend, continue, expect, project, predict, estimate, could, should, would, will, and similar expressions, should be considered as identifying forward-looking statements, although other phrasing may be used. Such forward-looking statements involve risks and uncertainties and may not be realized due to a variety of factors. Additional factors that could cause actual results to differ materially from those expressed in the forward-looking statements are discussed in the reports (such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q) filed by the Company with the SEC. You should consider such factors and not place undue reliance on such forward-looking statements. No obligation is undertaken by the Company to update such forward-looking statements to reflect events or circumstances occurring after the issuance of this presentation. NON-GAAP FINANCIAL MEASURES Statements included in this presentation include non-GAAP financial measures and should be read along with the accompanying tables under the section titled “Non-GAAP Reconciliations.” The Company uses non-GAAP financial measures to analyze its performance. Management believes that non-GAAP financial measures provide additional useful information that allows readers to evaluate the ongoing performance of CNB Financial Corporation and provide meaningful comparison to its peers. Non- GAAP financial measures should not be considered as an alternative to any measure of performance or financial condition as promulgated under GAAP, and investors should consider the Company’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. 3CERTAIN IMPORTANT INFORMATION CAUTION REGARDING FORWARD LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that relate to future events or the future performance of CNB Financial Corporation (the “Company”). Forward-looking statements are not guarantees of performance or results. These forward-looking statements are based on the current beliefs and expectations of the respective management of the Company and are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond their respective control and which may be heightened by the novel coronavirus, or COVID-19 pandemic. In addition, these forward-looking statements are subject to assumptions with respect to future business strategies and decisions that are subject to change. Actual results may differ materially from the anticipated results discussed or implied in these forward-looking statements because of numerous possible uncertainties. Words like may, plan, contemplate, anticipate, believe, intend, continue, expect, project, predict, estimate, could, should, would, will, and similar expressions, should be considered as identifying forward-looking statements, although other phrasing may be used. Such forward-looking statements involve risks and uncertainties and may not be realized due to a variety of factors. Additional factors that could cause actual results to differ materially from those expressed in the forward-looking statements are discussed in the reports (such as Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q) filed by the Company with the SEC. You should consider such factors and not place undue reliance on such forward-looking statements. No obligation is undertaken by the Company to update such forward-looking statements to reflect events or circumstances occurring after the issuance of this presentation. NON-GAAP FINANCIAL MEASURES Statements included in this presentation include non-GAAP financial measures and should be read along with the accompanying tables under the section titled “Non-GAAP Reconciliations.” The Company uses non-GAAP financial measures to analyze its performance. Management believes that non-GAAP financial measures provide additional useful information that allows readers to evaluate the ongoing performance of CNB Financial Corporation and provide meaningful comparison to its peers. Non- GAAP financial measures should not be considered as an alternative to any measure of performance or financial condition as promulgated under GAAP, and investors should consider the Company’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. 3

TERMS OF PROPOSED PREFERRED STOCK OFFERING CNB Financial Corporation (NASDAQ: CCNE) ISSUER (Depository Shares 1/40) Non-Cumulative Perpetual Preferred Stock, Series A SECURITY $25.00 per depository share LIQUIDATION PREFERENCE TERM Perpetual ISSUANCE TYPE SEC Registered Dividends will be paid quarterly in arrears if declared DIVIDEND PAYMENT DATES Redeemable at issuer’s option, subject to regulatory approval OPTIONAL REDEMPTION § On any dividend payment date on or after 5 years in whole or in part, or § at any time within 90 days following a regulatory capital treatment event, in whole but not in part General corporate purposes, including working capital and the funding of USE OF PROCEEDS organic growth or potential acquisitions NASDAQ listing within 30 days of pricing PLANNED LISTING BOOK RUNNING MANAGERS & CO-MANAGER & 4TERMS OF PROPOSED PREFERRED STOCK OFFERING CNB Financial Corporation (NASDAQ: CCNE) ISSUER (Depository Shares 1/40) Non-Cumulative Perpetual Preferred Stock, Series A SECURITY $25.00 per depository share LIQUIDATION PREFERENCE TERM Perpetual ISSUANCE TYPE SEC Registered Dividends will be paid quarterly in arrears if declared DIVIDEND PAYMENT DATES Redeemable at issuer’s option, subject to regulatory approval OPTIONAL REDEMPTION § On any dividend payment date on or after 5 years in whole or in part, or § at any time within 90 days following a regulatory capital treatment event, in whole but not in part General corporate purposes, including working capital and the funding of USE OF PROCEEDS organic growth or potential acquisitions NASDAQ listing within 30 days of pricing PLANNED LISTING BOOK RUNNING MANAGERS & CO-MANAGER & 4

CORPORATE OVERVIEWCORPORATE OVERVIEW

INVESTMENT HIGHLIGHTS A PREMIER FRANCHISE SUPERIOR MARKET POSITION ATTRACTIVE BUSINESS MIX § Strong market presence with 4 § Diversified loan portfolio with § #1 market share and community bank of diversified local brands that are well exceptionally high growth in Erie and choice in Clearfield County since 1865 recognized within their respective Buffalo markets § #4 community bank in legacy CNB Bank markets (1) § Robust C&I lender comprising 41.6% of markets § Meaningful scale in key growth loan portfolio markets, including Buffalo, NY, § #3 ranked community bank in the (1) Columbus, OH and Cleveland, OH Buffalo MSA§ Stable funding base, average deposits per branch of approximately $80 million EXPERIENCED LEADERSHIP STRONG FINANCIAL POSITIONING CONSISTENT GROWTH STORY § Led by Chief Executive Officer Joe Bower § $4.5B in total assets with YTD ROATCE § Strong and successful track record of since 2010 with 30+ years of banking of 12.31% organic growth experience § Acquisitions on a selective basis to § Strives to achieve and maintain enter new growth markets or § Richard Greslick, Chief Support Officer, has performance levels in the top quartile supplement existing growth markets been with CNB for 22 years of peer group § Recent addition of Tito Lima as CFO in July § Completed 3 acquisitions since 2013 § High performing ROA and ROE with 2019, with 31 years experience in Banking prudent expense management (1) Community bank defined as banks with total assets < $30.0B 6 Note: YTD is abbreviation for the 6 month period ended June 30, 2020INVESTMENT HIGHLIGHTS A PREMIER FRANCHISE SUPERIOR MARKET POSITION ATTRACTIVE BUSINESS MIX § Strong market presence with 4 § Diversified loan portfolio with § #1 market share and community bank of diversified local brands that are well exceptionally high growth in Erie and choice in Clearfield County since 1865 recognized within their respective Buffalo markets § #4 community bank in legacy CNB Bank markets (1) § Robust C&I lender comprising 41.6% of markets § Meaningful scale in key growth loan portfolio markets, including Buffalo, NY, § #3 ranked community bank in the (1) Columbus, OH and Cleveland, OH Buffalo MSA§ Stable funding base, average deposits per branch of approximately $80 million EXPERIENCED LEADERSHIP STRONG FINANCIAL POSITIONING CONSISTENT GROWTH STORY § Led by Chief Executive Officer Joe Bower § $4.5B in total assets with YTD ROATCE § Strong and successful track record of since 2010 with 30+ years of banking of 12.31% organic growth experience § Acquisitions on a selective basis to § Strives to achieve and maintain enter new growth markets or § Richard Greslick, Chief Support Officer, has performance levels in the top quartile supplement existing growth markets been with CNB for 22 years of peer group § Recent addition of Tito Lima as CFO in July § Completed 3 acquisitions since 2013 § High performing ROA and ROE with 2019, with 31 years experience in Banking prudent expense management (1) Community bank defined as banks with total assets < $30.0B 6 Note: YTD is abbreviation for the 6 month period ended June 30, 2020

CNB FINANCIAL CORPORATION § Holding Company for CNB Bank (Clearfield, PA), serving the community since 1865 § 45 full service branches and 1 loan production office throughout Pennsylvania, GREATER New York and Ohio BUFFALO, NY § CNB Bank’s regional divisions include CNB Bank (Western PA); FC Bank (Columbus & Central OH), ERIEBANK (Cleveland, OH & Erie, PA); and BankOnBuffalo (Buffalo, NY) ERIE, PA NY § NASDAQ: CCNE; Market Capitalization: $304.9 million FINANCIAL HIGHLIGHTS CLEVELAND, OH ASSETS: $4.5 billion PA DEPOSITS: $3.6 billion COLUMBUS, OH LOANS: $3.0 billion YTD ROAA: 0.87% OH CNB BANK YTD ROATCE: 12.31% ERIEBANK BANKONBUFFALO NPAS/ASSETS: 0.82% FC BANK Note: Market data as of 8/12/2020 Note: Financial data as of 6/30/2020 7 Source: Market capitalization data from S&P Global Market Intelligence CNB FINANCIAL CORPORATION § Holding Company for CNB Bank (Clearfield, PA), serving the community since 1865 § 45 full service branches and 1 loan production office throughout Pennsylvania, GREATER New York and Ohio BUFFALO, NY § CNB Bank’s regional divisions include CNB Bank (Western PA); FC Bank (Columbus & Central OH), ERIEBANK (Cleveland, OH & Erie, PA); and BankOnBuffalo (Buffalo, NY) ERIE, PA NY § NASDAQ: CCNE; Market Capitalization: $304.9 million FINANCIAL HIGHLIGHTS CLEVELAND, OH ASSETS: $4.5 billion PA DEPOSITS: $3.6 billion COLUMBUS, OH LOANS: $3.0 billion YTD ROAA: 0.87% OH CNB BANK YTD ROATCE: 12.31% ERIEBANK BANKONBUFFALO NPAS/ASSETS: 0.82% FC BANK Note: Market data as of 8/12/2020 Note: Financial data as of 6/30/2020 7 Source: Market capitalization data from S&P Global Market Intelligence

UNIQUE MULTI-STATE, MULTI-BRAND MODEL 18 full-service offices Opened in 2013 with the Opened August 2005 Opened in 2016 as a acquisition of FC Banc single loan production Western and Central PA Corp. in Bucyrus, OH Led by Division President office which was focus David J. Zimmer, III, an converted to a full-service Led by Division President Erie native with 30+ years branch in 2017 Jenny Saunders, who has 9 full-service offices in of experience 36 years of banking Clearfield & Centre, PA Currently 10 full-service experience counties 10 full-service offices offices with the addition Focus on the greater- serving Erie, Crawford, & of Bank of Akron Columbus metro area and 5 full-service offices in Warren counties in PA, northeastern Ohio McKean & Elk counties and Lake, Ashtabula, & Led by Division President Cuyahoga counties in OH & long-time local banker 7 full-service offices Other offices in Jefferson, Martin Griffith serving Bucyrus, Cambria, Indiana, and 1 loan production office in Cardington, Dublin, Blair, PA counties Cleveland, OH Headquartered in Fredericktown, Shiloh, downtown Buffalo’s iconic Grandview, and Legacy bank of the Expanded greater- Electric Tower building Worthington, OH organization founded in Cleveland presence with Replicate ERIEBANK 1865 acquisition of Lake Strong growth story with strategy to grow National Bank in 2016 recent, significant loan & organically via opening deposit growth along with new offices and hiring the Bank of Akron additional lenders acquisition 8UNIQUE MULTI-STATE, MULTI-BRAND MODEL 18 full-service offices Opened in 2013 with the Opened August 2005 Opened in 2016 as a acquisition of FC Banc single loan production Western and Central PA Corp. in Bucyrus, OH Led by Division President office which was focus David J. Zimmer, III, an converted to a full-service Led by Division President Erie native with 30+ years branch in 2017 Jenny Saunders, who has 9 full-service offices in of experience 36 years of banking Clearfield & Centre, PA Currently 10 full-service experience counties 10 full-service offices offices with the addition Focus on the greater- serving Erie, Crawford, & of Bank of Akron Columbus metro area and 5 full-service offices in Warren counties in PA, northeastern Ohio McKean & Elk counties and Lake, Ashtabula, & Led by Division President Cuyahoga counties in OH & long-time local banker 7 full-service offices Other offices in Jefferson, Martin Griffith serving Bucyrus, Cambria, Indiana, and 1 loan production office in Cardington, Dublin, Blair, PA counties Cleveland, OH Headquartered in Fredericktown, Shiloh, downtown Buffalo’s iconic Grandview, and Legacy bank of the Expanded greater- Electric Tower building Worthington, OH organization founded in Cleveland presence with Replicate ERIEBANK 1865 acquisition of Lake Strong growth story with strategy to grow National Bank in 2016 recent, significant loan & organically via opening deposit growth along with new offices and hiring the Bank of Akron additional lenders acquisition 8

EXPERIENCED LEADERSHIP TOP EXECUTIVES & CHAIRMAN OF THE BOARD JOSEPH B. BOWER JR. President, CEO & Director RICHARD GRESLICK JR. Sr. EVP; Chief Support Officer TITO L. LIMA EVP, CFO & Treasurer PETER F. SMITH Independent Chairman of the Board of Directors CEO of CNB Financial Corporation since January 1, 2010 Has been with the Company since 1997 – previously served as Chief Financial Officer and Chief Operating Officer of CNB Bank as well as Secretary and Treasurer of CNB Financial Corporation Previously worked as a certified public accountant and served in the United States Army Serves on various boards within the community Served as Sr. EVP & Chief Support Officer since 2009 Previous roles with CNB include Sr. Vice President of Administration and Vice President of Operations Joined CNB immediately after college graduation and participated in the bank’s management training program Joined CNB Financial Corporation as CFO in July 2019 Formerly served as CFO and EVP at NexTier Bank, N.A. Prior to NexTier, previously served as EVP and Corporate Controller of National Penn Bancshares, Inc. Additional experience includes: Interim Chief Accounting Officer of Sterling Financial Corp; Corporate Controller of F.N.B. Corporation; Chief Financial Officer of First National Bank of Pennsylvania Served as Chairman of the Board since January 1, 2017 and has been a Director since September 1989 Also serves as Chairman of the Board at CNB Bank Lawyer with practice concentrated on commercial transactions, real estate, mineral law, estate planning and related litigation Has served on the Ethics Committee of The Pennsylvania Bar Association since 1994 BOARD OF DIRECTORS PETER F. SMITH Independent Chairman of See biographical information on left the Board of Directors JOSEPH B. BOWER JR. See biographical information on left RICHARD GRESLICK JR. See biographical information on left President and CEO, Lee Industries and ROBERT W. MONTLER Keystone Process Equipment JOEL E. PETERSON President of Clearfield Wholesale Paper Economic Development and Workforce DEBORAH D. PONTZER Specialist, Office of Congressman Glenn Thompson JEFFREY S. POWELL President, J.J. Powell, Inc. Vice President and Owner, Scott NICK N. SCOTT JR. Enterprises President & CEO, Beacon Light Behavioral RICHARD B. SEAGER III Health Systems Managing Officer and Director, St. Marys FRANCIS X. STRAUB III Pharmacy, Inc. and Bennetts Valley Pharmacy, Inc. PETER C. VARISCHETTI President, Varischetti Holdings, LP JULIE M. YOUNG Human Resources Attorney, JMY Law, LLC

GROWTH MILESTONES $50M Sub Debt Raise Acquisition of Lake National Acquisition of Bank CNB Financial County Corporation Conversion to FC Banc Corp. National Bank holding a state in Bucyrus, OH Bank on w/ $360M in of Clearfield company banking Buffalo is established organized charter assets formed 1865 1934 1984 2005 2006 2010 2013 2015 2016 2020 th 150 Reorganized ERIEBANK Common Acquisition through a formed Equity Capital Anniversary of Raise of Celebration stock offering Bank of Akron to existing $34.5M depositors Joseph Bower becomes CEO 10GROWTH MILESTONES $50M Sub Debt Raise Acquisition of Lake National Acquisition of Bank CNB Financial County Corporation Conversion to FC Banc Corp. National Bank holding a state in Bucyrus, OH Bank on w/ $360M in of Clearfield company banking Buffalo is established organized charter assets formed 1865 1934 1984 2005 2006 2010 2013 2015 2016 2020 th 150 Reorganized ERIEBANK Common Acquisition through a formed Equity Capital Anniversary of Raise of Celebration stock offering Bank of Akron to existing $34.5M depositors Joseph Bower becomes CEO 10

A BANK OF CHOICE IN LEGACY CNB BANK MARKETS LEADING DEPOSIT MARKET SHARE (1) Combined CNB Bank Franchise County Footprint 2019 2019 Number of Total Deposits In Total Market Rank Institution (ST) Branches Market ($000) Share (%) § 18 full-service offices operate as CNB Bank 1 S&T Bancorp Inc. (PA) 21 2,310,517 14.6 throughout western and central Pennsylvania 2 F.N.B. Corp. (PA) 30 1,868,389 11.8 3 First Commonwealth Financial (PA) 34 1,643,093 10.4 4 PNC Financial Services Group (PA) 12 1,236,946 7.8 (1) § #4 ranked community bank in CNB Bank brand’s 5 M&T Bank Corp. (NY) 14 1,080,854 6.8 6 Northwest Bancshares, Inc. (PA) 24 1,059,619 6.7 (2) combined county market 7 CNB Financial Corp. (PA) 18 1,038,986 6.6 8 1st Summit Bncp Johnstown Inc. (PA) 13 825,072 5.2 9 AmeriServ Financial Inc. (PA) 10 728,363 4.6 § Community bank of choice in its markets 10 Citizens Financial Group Inc. (RI) 8 543,049 3.4 11 Reliance Bancorp MHC (PA) 9 376,401 2.4 12 Riverview Financial Corp. (PA) 8 356,064 2.3 § Deep roots in the community – established in 1865 13 InFirst Bancorp MHC (PA) 6 349,044 2.2 14 Truist Financial Corp. (NC) 2 296,848 1.9 15 Hamlin B&TC (PA) 7 286,169 1.8 § Proven market leader with strong deposit market 16 Community Bankers' Corporation (PA) 6 244,916 1.6 share positioning 17 Kish Bancorp Inc. (PA) 4 218,799 1.4 18 Emclaire Financial Corp (PA) 7 198,980 1.3 19 Penns Woods Bancorp Inc. (PA) 5 186,750 1.2 20 Somerset Trust Holding Company (PA) 8 177,478 1.1 § #1 community bank by deposit market share in 21 PennCrest BANK (PA) 7 135,515 0.9 Clearfield County, PA – 37% of the market 22 Altoona First SB (PA) 3 132,133 0.8 23 Fulton Financial Corp. (PA) 2 113,557 0.7 24 Slovenian Savings & Loan Assn. (PA) 4 105,909 0.7 § Top 3 deposit market share in Elk and McKean 25 Investment SB (PA) 2 76,296 0.5 26 Citizens Financial Services (PA) 1 59,544 0.4 counties 27 Juniata Valley Financial Corp. (PA) 2 50,321 0.3 28 Mifflinburg Bancorp Inc. (PA) 1 34,945 0.2 29 Hometown Bank of Pennsylvania (PA) 2 21,738 0.1 30 Old Dominion National Bank (VA) 1 16,988 0.1 31 Citizens & Northern Corp. (PA) 1 9,934 0.1 32 Woodforest Financial Grp Inc. (TX) 2 4,054 0.0 Total for Institutions in Market 274 15,787,271 100.0 (1) Community bank defined as banks with total assets < $30 billion (2) Combined county market includes: McKean, PA; Elk, PA; Jefferson, PA; Clearfield, PA; Indiana, PA; Cambria, PA; Blair, PA; Centre, PA 11 Source: Deposit Market Share data from S&P Global Market Intelligence; Deposit market share data shown based upon 2019 FDIC dataA BANK OF CHOICE IN LEGACY CNB BANK MARKETS LEADING DEPOSIT MARKET SHARE (1) Combined CNB Bank Franchise County Footprint 2019 2019 Number of Total Deposits In Total Market Rank Institution (ST) Branches Market ($000) Share (%) § 18 full-service offices operate as CNB Bank 1 S&T Bancorp Inc. (PA) 21 2,310,517 14.6 throughout western and central Pennsylvania 2 F.N.B. Corp. (PA) 30 1,868,389 11.8 3 First Commonwealth Financial (PA) 34 1,643,093 10.4 4 PNC Financial Services Group (PA) 12 1,236,946 7.8 (1) § #4 ranked community bank in CNB Bank brand’s 5 M&T Bank Corp. (NY) 14 1,080,854 6.8 6 Northwest Bancshares, Inc. (PA) 24 1,059,619 6.7 (2) combined county market 7 CNB Financial Corp. (PA) 18 1,038,986 6.6 8 1st Summit Bncp Johnstown Inc. (PA) 13 825,072 5.2 9 AmeriServ Financial Inc. (PA) 10 728,363 4.6 § Community bank of choice in its markets 10 Citizens Financial Group Inc. (RI) 8 543,049 3.4 11 Reliance Bancorp MHC (PA) 9 376,401 2.4 12 Riverview Financial Corp. (PA) 8 356,064 2.3 § Deep roots in the community – established in 1865 13 InFirst Bancorp MHC (PA) 6 349,044 2.2 14 Truist Financial Corp. (NC) 2 296,848 1.9 15 Hamlin B&TC (PA) 7 286,169 1.8 § Proven market leader with strong deposit market 16 Community Bankers' Corporation (PA) 6 244,916 1.6 share positioning 17 Kish Bancorp Inc. (PA) 4 218,799 1.4 18 Emclaire Financial Corp (PA) 7 198,980 1.3 19 Penns Woods Bancorp Inc. (PA) 5 186,750 1.2 20 Somerset Trust Holding Company (PA) 8 177,478 1.1 § #1 community bank by deposit market share in 21 PennCrest BANK (PA) 7 135,515 0.9 Clearfield County, PA – 37% of the market 22 Altoona First SB (PA) 3 132,133 0.8 23 Fulton Financial Corp. (PA) 2 113,557 0.7 24 Slovenian Savings & Loan Assn. (PA) 4 105,909 0.7 § Top 3 deposit market share in Elk and McKean 25 Investment SB (PA) 2 76,296 0.5 26 Citizens Financial Services (PA) 1 59,544 0.4 counties 27 Juniata Valley Financial Corp. (PA) 2 50,321 0.3 28 Mifflinburg Bancorp Inc. (PA) 1 34,945 0.2 29 Hometown Bank of Pennsylvania (PA) 2 21,738 0.1 30 Old Dominion National Bank (VA) 1 16,988 0.1 31 Citizens & Northern Corp. (PA) 1 9,934 0.1 32 Woodforest Financial Grp Inc. (TX) 2 4,054 0.0 Total for Institutions in Market 274 15,787,271 100.0 (1) Community bank defined as banks with total assets < $30 billion (2) Combined county market includes: McKean, PA; Elk, PA; Jefferson, PA; Clearfield, PA; Indiana, PA; Cambria, PA; Blair, PA; Centre, PA 11 Source: Deposit Market Share data from S&P Global Market Intelligence; Deposit market share data shown based upon 2019 FDIC data

KEY GROWTH MARKETS BUFFALO, NY COLUMBUS, OH CLEVELAND, OH / ERIE, PA nd nd § 2 largest city in the state of New § One of the nation’s fastest growing § Cleveland is the 2 largest city in the York cities state of Ohio § High growth market due to several § Growth fueled by a diversified § Major manufacturing and commercial development activities worth over economy with 19% of employment hub $6B enacted since 2006: coming from education, tech, government, research, insurance and § Ranks as one of the chief ports on the § Wider development of the Buffalo healthcare Great Lakes Niagara Medical Campus § With a regional population of 2.1 § Experienced significant recent public § Solar City, a solar panel factory in million people, this growth can be and private investment in the last South Buffalo attributed to the OneColumbus decade Strategy, formerly known as the § Northland Corridor, the home of a $44 million WNY Workforce Columbus 2020 Regional Growth § Economy focused on healthcare, Training Center Strategy: education, research, financial services and manufacturing § HarborCenter, a $200M state-of- § Catalyst for over 150,000 net new the art hockey / entertainment jobs and over $8B of capital complex located in the downtown investment Buffalo / Canalside area § Since implementing this strategy, the population has seen a 30% increase in person per capita income 12 Source: city-buffalo.com; buffaloniagara.com; columbus.gov; columbusregion.com; city.cleveland.oh.us; rethinkcleveland.orgKEY GROWTH MARKETS BUFFALO, NY COLUMBUS, OH CLEVELAND, OH / ERIE, PA nd nd § 2 largest city in the state of New § One of the nation’s fastest growing § Cleveland is the 2 largest city in the York cities state of Ohio § High growth market due to several § Growth fueled by a diversified § Major manufacturing and commercial development activities worth over economy with 19% of employment hub $6B enacted since 2006: coming from education, tech, government, research, insurance and § Ranks as one of the chief ports on the § Wider development of the Buffalo healthcare Great Lakes Niagara Medical Campus § With a regional population of 2.1 § Experienced significant recent public § Solar City, a solar panel factory in million people, this growth can be and private investment in the last South Buffalo attributed to the OneColumbus decade Strategy, formerly known as the § Northland Corridor, the home of a $44 million WNY Workforce Columbus 2020 Regional Growth § Economy focused on healthcare, Training Center Strategy: education, research, financial services and manufacturing § HarborCenter, a $200M state-of- § Catalyst for over 150,000 net new the art hockey / entertainment jobs and over $8B of capital complex located in the downtown investment Buffalo / Canalside area § Since implementing this strategy, the population has seen a 30% increase in person per capita income 12 Source: city-buffalo.com; buffaloniagara.com; columbus.gov; columbusregion.com; city.cleveland.oh.us; rethinkcleveland.org

RECENT ACQUISITIVE SUCCESS (1) (2) (3) FC BANC CORP. LAKE NATIONAL BANK BANK OF AKRON ACQUISITION DATE 10/11/2013 7/15/2016 7/17/2020 ASSETS ($000) $364,163 $156,575 $471,221 LOANS ($000) $250,885 $122,367 $329,001 DEPOSITS ($000) $326,963 $139,712 $425,696 LTM ROAA (%) 0.98% 0.53% 0.81% LTM ROAE (%) 10.58% 5.73% 4.31% NPAs / ASSETS (%) 0.42% 2.37% 0.66% (1) Financial data as of most recent available quarter prior to close, ended 9/30/2013 (2) Financial data as of most recent available quarter prior to close, ended 6/30/2016 (3) Financial data as of most recent available quarter prior to close, ended 6/30/2020 Note: LTM is abbreviation for the 12 month period ended June 30, 2020 13 Source: S&P Global Market Intelligence; 8-K filings; Bank regulatory filings; see appendix for additional detail RECENT ACQUISITIVE SUCCESS (1) (2) (3) FC BANC CORP. LAKE NATIONAL BANK BANK OF AKRON ACQUISITION DATE 10/11/2013 7/15/2016 7/17/2020 ASSETS ($000) $364,163 $156,575 $471,221 LOANS ($000) $250,885 $122,367 $329,001 DEPOSITS ($000) $326,963 $139,712 $425,696 LTM ROAA (%) 0.98% 0.53% 0.81% LTM ROAE (%) 10.58% 5.73% 4.31% NPAs / ASSETS (%) 0.42% 2.37% 0.66% (1) Financial data as of most recent available quarter prior to close, ended 9/30/2013 (2) Financial data as of most recent available quarter prior to close, ended 6/30/2016 (3) Financial data as of most recent available quarter prior to close, ended 6/30/2020 Note: LTM is abbreviation for the 12 month period ended June 30, 2020 13 Source: S&P Global Market Intelligence; 8-K filings; Bank regulatory filings; see appendix for additional detail

RECENT ACQUISITION OF BANK OF AKRON STRATEGICALLY COMPELLING TRANSACTION § In market expansion for high growth BankOnBuffalo division of CNB STRATEGIC § Nearly doubles division assets to > $1.0B IMPACT ON § Consolidation of larger competitors in BUFFALO MARKET Western New York has left a void in serving smaller commercial banking clientele § Bank of Akron is a highly regarded, high performing community bank § Branches, footprints and target markets are TRANSACTION contiguous but not overlapping RATIONALE § Similar commercial banking focus to CNB § Provides critical personnel depth to rapidly growing Buffalo franchise § Bank will operate as a locally managed and uniquely branded BankOnBuffalo division ORGANIZATIONAL § Bank of Akron CEO, Tony Delmonte, expected to join BankOnBuffalo as Market Executive STRUCTURE § All existing Bank of Akron locations are expected to remain open BARK Locations CCNE Locations 14RECENT ACQUISITION OF BANK OF AKRON STRATEGICALLY COMPELLING TRANSACTION § In market expansion for high growth BankOnBuffalo division of CNB STRATEGIC § Nearly doubles division assets to > $1.0B IMPACT ON § Consolidation of larger competitors in BUFFALO MARKET Western New York has left a void in serving smaller commercial banking clientele § Bank of Akron is a highly regarded, high performing community bank § Branches, footprints and target markets are TRANSACTION contiguous but not overlapping RATIONALE § Similar commercial banking focus to CNB § Provides critical personnel depth to rapidly growing Buffalo franchise § Bank will operate as a locally managed and uniquely branded BankOnBuffalo division ORGANIZATIONAL § Bank of Akron CEO, Tony Delmonte, expected to join BankOnBuffalo as Market Executive STRUCTURE § All existing Bank of Akron locations are expected to remain open BARK Locations CCNE Locations 14

GROWTH: FOCUS ON BUFFALO LEADING DEPOSIT MARKET SHARE Buffalo-Cheektowaga, NY MSA 2019 2019 Number of Total Deposits In Total Market Rank Institution (ST) Branches Market ($000) Share (%) § BankOnBuffalo established as a division of CNB 1 M&T Bank Corp. (NY) 52 29,298,925 63.6 since 2016 2 KeyCorp (OH) 63 7,483,530 16.2 3 Bank of America Corporation (NC) 21 2,548,580 5.5 4 Northwest Bancshares, Inc. (PA) 26 1,870,018 4.1 § Division President Martin Griffith is a longtime local 5 Citizens Financial Group Inc. (RI) 39 1,858,068 4.0 banker well known to the market 6 Evans Bancorp Inc. (NY) 15 1,211,546 2.6 Pro Forma Buffalo MSA 10 761,678 1.7 7 CNB Financial Corp. (PA) 4 433,648 0.9 § Primarily focused on the large number of C&I 8 Bank of Akron (NY) 6 328,030 0.7 businesses in Erie and Niagara counties of NY 9 Alden State Bank (NY) 2 296,500 0.6 10 Lake Shore Bancorp Inc. (MHC) (NY) 6 214,632 0.5 11 Financial Institutions Inc. (NY) 4 170,756 0.4§ Division headquartered in the Electric Tower 12 Community Bank System Inc. (NY) 5 149,217 0.3 Building in Downtown Buffalo; additional full 13 Holland Bancorp Inc. (NY) 3 133,947 0.3 14 C.C. Bancorp Inc. (NY) 1 37,856 0.1 service offices in the Williamsville, Niagara Falls and 15 JPMorgan Chase & Co. (NY) 1 33,834 0.1 Orchard Park communities 16 Tompkins Financial Corporation (NY) 1 6,653 0.0 17 Woodforest Financial Grp Inc. (TX) 2 4,680 0.0 18 HSBC Holdings 1 0 0.0 § Acquisition of Bank of Akron supports growth Total For Institutions In Market 252 46,080,420 100.0 presence in the market place with pro forma deposits approaching $800M in the MSA (1) #3 ranked community bank in the Buffalo-Cheektowaga § Buffalo market driving meaningful growth - Buffalo NY MSA based upon deposit market share market loans grew $116 million, or 36.3%, since June 30, 2019; deposits grew by $204 million, or 57.7%, since June 30, 2019 (1) Community bank defined as banks with total assets < $30 billion Note: Deposit market share data shown based upon 2019 FDIC data 15 Source: Deposit Market Share data from S&P Global Market Intelligence GROWTH: FOCUS ON BUFFALO LEADING DEPOSIT MARKET SHARE Buffalo-Cheektowaga, NY MSA 2019 2019 Number of Total Deposits In Total Market Rank Institution (ST) Branches Market ($000) Share (%) § BankOnBuffalo established as a division of CNB 1 M&T Bank Corp. (NY) 52 29,298,925 63.6 since 2016 2 KeyCorp (OH) 63 7,483,530 16.2 3 Bank of America Corporation (NC) 21 2,548,580 5.5 4 Northwest Bancshares, Inc. (PA) 26 1,870,018 4.1 § Division President Martin Griffith is a longtime local 5 Citizens Financial Group Inc. (RI) 39 1,858,068 4.0 banker well known to the market 6 Evans Bancorp Inc. (NY) 15 1,211,546 2.6 Pro Forma Buffalo MSA 10 761,678 1.7 7 CNB Financial Corp. (PA) 4 433,648 0.9 § Primarily focused on the large number of C&I 8 Bank of Akron (NY) 6 328,030 0.7 businesses in Erie and Niagara counties of NY 9 Alden State Bank (NY) 2 296,500 0.6 10 Lake Shore Bancorp Inc. (MHC) (NY) 6 214,632 0.5 11 Financial Institutions Inc. (NY) 4 170,756 0.4§ Division headquartered in the Electric Tower 12 Community Bank System Inc. (NY) 5 149,217 0.3 Building in Downtown Buffalo; additional full 13 Holland Bancorp Inc. (NY) 3 133,947 0.3 14 C.C. Bancorp Inc. (NY) 1 37,856 0.1 service offices in the Williamsville, Niagara Falls and 15 JPMorgan Chase & Co. (NY) 1 33,834 0.1 Orchard Park communities 16 Tompkins Financial Corporation (NY) 1 6,653 0.0 17 Woodforest Financial Grp Inc. (TX) 2 4,680 0.0 18 HSBC Holdings 1 0 0.0 § Acquisition of Bank of Akron supports growth Total For Institutions In Market 252 46,080,420 100.0 presence in the market place with pro forma deposits approaching $800M in the MSA (1) #3 ranked community bank in the Buffalo-Cheektowaga § Buffalo market driving meaningful growth - Buffalo NY MSA based upon deposit market share market loans grew $116 million, or 36.3%, since June 30, 2019; deposits grew by $204 million, or 57.7%, since June 30, 2019 (1) Community bank defined as banks with total assets < $30 billion Note: Deposit market share data shown based upon 2019 FDIC data 15 Source: Deposit Market Share data from S&P Global Market Intelligence

BUSINESS HIGHLIGHTSBUSINESS HIGHLIGHTS

2ND QUARTER 2020 HIGHLIGHTS FINANCIAL HIGHLIGHTS OBSERVATIONS § Net income of $8.2 million§ Participated aggressively in the SBA PPP leading to processing fees of approximately $8.8 million § Diluted earnings per share of $0.54 § Maintains a strong and stable liquidity level with § MRQ Return on average assets of 0.80% $663 million in cash and $525 million in additional borrowing capacity with the FHLB of Pittsburgh § MRQ Return on average tangible common equity of (1) 11.71% § Monitoring COVID-19 related credit exposures in the Hotels/Motels, Restaurants/Fast Foods, and § Excluding net PPP loans, loans grew $191 million, or Commercial Acquisition, Development, and 7.3% compared to June 30, 2019, with growth construction loan sectors primarily driven by commercial and industrial loans § Buffalo market driving meaningful growth - Buffalo § MRQ efficiency ratio of 57.76% market loans grew $116 million or 36.3% since June 30, 2019; deposits grew by $204 million or 57.7% § 44 basis point decrease in cost of interest bearing since June 30, 2019 liabilities to 1.00% for the quarter in comparison to the second quarter of 2019 § MRQ provision expense of $5.7 million was primarily driven by adjustments to the ALLL § Tier 1 Leverage Ratio of 7.55%; excluding PPP qualitative factors related to economic growth and leverage ratio of 7.90% unemployment, to reflect management’s assumptions of a continued significant impact of § TCE/TA of 6.58%; excluding PPP TCE/TA of 7.30% the pandemic 17 (1) Tangible common equity is a non-GAAP financial measure; see appendix for reconciliation 2ND QUARTER 2020 HIGHLIGHTS FINANCIAL HIGHLIGHTS OBSERVATIONS § Net income of $8.2 million§ Participated aggressively in the SBA PPP leading to processing fees of approximately $8.8 million § Diluted earnings per share of $0.54 § Maintains a strong and stable liquidity level with § MRQ Return on average assets of 0.80% $663 million in cash and $525 million in additional borrowing capacity with the FHLB of Pittsburgh § MRQ Return on average tangible common equity of (1) 11.71% § Monitoring COVID-19 related credit exposures in the Hotels/Motels, Restaurants/Fast Foods, and § Excluding net PPP loans, loans grew $191 million, or Commercial Acquisition, Development, and 7.3% compared to June 30, 2019, with growth construction loan sectors primarily driven by commercial and industrial loans § Buffalo market driving meaningful growth - Buffalo § MRQ efficiency ratio of 57.76% market loans grew $116 million or 36.3% since June 30, 2019; deposits grew by $204 million or 57.7% § 44 basis point decrease in cost of interest bearing since June 30, 2019 liabilities to 1.00% for the quarter in comparison to the second quarter of 2019 § MRQ provision expense of $5.7 million was primarily driven by adjustments to the ALLL § Tier 1 Leverage Ratio of 7.55%; excluding PPP qualitative factors related to economic growth and leverage ratio of 7.90% unemployment, to reflect management’s assumptions of a continued significant impact of § TCE/TA of 6.58%; excluding PPP TCE/TA of 7.30% the pandemic 17 (1) Tangible common equity is a non-GAAP financial measure; see appendix for reconciliation

FINANCIAL TRENDS TOTAL ASSETS ($M) TOTAL GROSS LOANS ($M) $5,000 $5,000 $4,470 $4,000 $4,000 $3,764 $3,000 $3,222 $3,000 $3,030 $2,769 $2,804 $2,574 $2,475 $2,000 $2,000 $2,146 $1,874 $1,000 $1,000 $0 $0 2016Y 2017Y 2018Y 2019Y 2020YTD 2016Y 2017Y 2018Y 2019Y 2020YTD TOTAL DEPOSITS ($M) NET INCOME ($000) $5,000 $50,000 $4,000 $40,000 $40,081 $37,900 $3,596 $3,000 $33,719 $30,000 $3,102 $2,611 $2,000 $23,860 $20,000 $2,168 $2,018 $20,540 $1,000 $10,000 $0 $0 2016Y 2017Y 2018Y 2019Y 2020YTD 2016Y 2017Y 2018Y 2019Y 2020 LTM (1) Tangible common equity is a non-GAAP financial measure; see appendix for reconciliation 18 Note: YTD data as of June 30, 2020FINANCIAL TRENDS TOTAL ASSETS ($M) TOTAL GROSS LOANS ($M) $5,000 $5,000 $4,470 $4,000 $4,000 $3,764 $3,000 $3,222 $3,000 $3,030 $2,769 $2,804 $2,574 $2,475 $2,000 $2,000 $2,146 $1,874 $1,000 $1,000 $0 $0 2016Y 2017Y 2018Y 2019Y 2020YTD 2016Y 2017Y 2018Y 2019Y 2020YTD TOTAL DEPOSITS ($M) NET INCOME ($000) $5,000 $50,000 $4,000 $40,000 $40,081 $37,900 $3,596 $3,000 $33,719 $30,000 $3,102 $2,611 $2,000 $23,860 $20,000 $2,168 $2,018 $20,540 $1,000 $10,000 $0 $0 2016Y 2017Y 2018Y 2019Y 2020YTD 2016Y 2017Y 2018Y 2019Y 2020 LTM (1) Tangible common equity is a non-GAAP financial measure; see appendix for reconciliation 18 Note: YTD data as of June 30, 2020

EARNINGS POWER RETURN ON AVERAGE ASSETS RECENT EFFICIENCY INITIATIVES § Re-established loan pricing floors from 4% to 5% 1.40% based on risk rating 1.17% 1.12% 1.20% 1.00% 0.89% 0.87%§ Implemented temporary hiring freeze; once hiring 0.85% 0.80% freeze ends, staff additions will be prioritized based on business generating functions 0.60% 0.40% § Eliminated positions based on efficiencies 0.20% developed during work-at-home period 0.00% 2016 2017 2018 2019 2020YTD § Consolidated 3 branches into existing branch facilities RETURN ON AVERAGE (1) TANGIBLE COMMON EQUITY EFFICIENCY RATIO 18.00% 100.0% 16.40% 16.27% 15.00% 80.0% 12.37% 12.31% 11.88% 61.7% 61.4% 12.00% 60.7% 60.1% 59.0% 60.0% 9.00% 40.0% 6.00% 20.0% 3.00% 0.00% 0.0% 2016 2017 2018 2019 2020YTD 2016 2017 2018 2019 2020YTD 19 (1) Tangible common equity is a non-GAAP financial measure; see appendix for reconciliation EARNINGS POWER RETURN ON AVERAGE ASSETS RECENT EFFICIENCY INITIATIVES § Re-established loan pricing floors from 4% to 5% 1.40% based on risk rating 1.17% 1.12% 1.20% 1.00% 0.89% 0.87%§ Implemented temporary hiring freeze; once hiring 0.85% 0.80% freeze ends, staff additions will be prioritized based on business generating functions 0.60% 0.40% § Eliminated positions based on efficiencies 0.20% developed during work-at-home period 0.00% 2016 2017 2018 2019 2020YTD § Consolidated 3 branches into existing branch facilities RETURN ON AVERAGE (1) TANGIBLE COMMON EQUITY EFFICIENCY RATIO 18.00% 100.0% 16.40% 16.27% 15.00% 80.0% 12.37% 12.31% 11.88% 61.7% 61.4% 12.00% 60.7% 60.1% 59.0% 60.0% 9.00% 40.0% 6.00% 20.0% 3.00% 0.00% 0.0% 2016 2017 2018 2019 2020YTD 2016 2017 2018 2019 2020YTD 19 (1) Tangible common equity is a non-GAAP financial measure; see appendix for reconciliation

LOAN PORTFOLIO COMPOSITION 6/30/2020 LOAN PORTFOLIO COMPOSITION OBSERVATIONS § MRQ loan yield of 4.67% § Loan growth driven primarily by increases in C&I COMMERCIAL loans and CRE loans MORTGAGE 28.5% C&I 41.6%§ Excluding $217 million of net PPP loans, loans grew $191 million, or 7.3% in compared to June 30, 2019 RESIDENTIAL REAL ESTATE § Loan growth attributable to private banking in 26.5% 2Q2020 was $37.0 million, or 18.1% CONSUMER & OTHER 3.3% § Loan growth attributable to Buffalo market in 2Q2020 was $116 million, or 36.3% Loan Portfolio Detail ($000s) 2016Y 2017Y 2018Y 2019Y 2020Q2 § CNB views commercial lending as its competitive Commercial & Industrial $567,800 $704,606 916,297 1,046,665 1,263,521 advantage and remains focused on the area by Commercial Mortgages 574,826 644,597 697,776 814,002 865,401 hiring and retaining experienced loan officers Residential Real Estate 652,883 713,347 771,309 814,030 805,413 § Continued focus on adhering to disciplined pricing Consumer & Other 81,457 87,298 93,966 134,500 100,453 and credit quality standards Total Gross Loans $1,876,966 $2,149,848 $2,479,348 $2,809,197 $3,034,788 LESS: Unearned Income 3,430 3,889 4,791 5,162 4,617 (1) § CRE concentration ratio of 246.4% Total Loans $1,873,536 $2,145,959 $2,474,557 $2,804,035 $3,030,171 Note: MRQ is abbreviation for the 3 month period ended June 30, 2020 20 (1) Defined as the regulatory agencies guidance on commercial real estate (CRE) as a percent of risk-based capitalLOAN PORTFOLIO COMPOSITION 6/30/2020 LOAN PORTFOLIO COMPOSITION OBSERVATIONS § MRQ loan yield of 4.67% § Loan growth driven primarily by increases in C&I COMMERCIAL loans and CRE loans MORTGAGE 28.5% C&I 41.6%§ Excluding $217 million of net PPP loans, loans grew $191 million, or 7.3% in compared to June 30, 2019 RESIDENTIAL REAL ESTATE § Loan growth attributable to private banking in 26.5% 2Q2020 was $37.0 million, or 18.1% CONSUMER & OTHER 3.3% § Loan growth attributable to Buffalo market in 2Q2020 was $116 million, or 36.3% Loan Portfolio Detail ($000s) 2016Y 2017Y 2018Y 2019Y 2020Q2 § CNB views commercial lending as its competitive Commercial & Industrial $567,800 $704,606 916,297 1,046,665 1,263,521 advantage and remains focused on the area by Commercial Mortgages 574,826 644,597 697,776 814,002 865,401 hiring and retaining experienced loan officers Residential Real Estate 652,883 713,347 771,309 814,030 805,413 § Continued focus on adhering to disciplined pricing Consumer & Other 81,457 87,298 93,966 134,500 100,453 and credit quality standards Total Gross Loans $1,876,966 $2,149,848 $2,479,348 $2,809,197 $3,034,788 LESS: Unearned Income 3,430 3,889 4,791 5,162 4,617 (1) § CRE concentration ratio of 246.4% Total Loans $1,873,536 $2,145,959 $2,474,557 $2,804,035 $3,030,171 Note: MRQ is abbreviation for the 3 month period ended June 30, 2020 20 (1) Defined as the regulatory agencies guidance on commercial real estate (CRE) as a percent of risk-based capital

ADDITIONAL LOAN DETAIL – COMMERCIAL REAL ESTATE § Total commercial real estate loans of $696 million (22.9% of total loans) § Diversified by property type – highest concentrations are Apartments and Mixed Use, 8.2% and 4.5% of total loans, respectively § 26.4% in deferral – 35% interest only; 65% principal & interest § Average loan size of $1.2 million CRE BREAKOUT & MODIFICATION DETAIL (6/30/2020) CRE PORTFOLIO (6/30/2020) Deferral Detail 2020Q2 % in Student Housing Restaurants ($000) # of Loans I/O P&I Total Deferral Commercial Real Estate 4% 1% Storage Units Plaza 2% Warehouse Apartments 247,527 27 3 0,243 23,599 53,842 21.8% 4% 3% Mixed Use 137,300 29 1 0,845 3 0,499 4 1,344 30.1% Manufacturing Office 96,491 20 6,047 1 7,748 2 3,795 24.7% 3% All Other 6 7,952 32 6,607 12,682 19,289 28.4% Apartments Retail 37,102 16 683 1 2,843 1 3,526 36.5% 29% Retail Manufacturing 30,082 5 168 5,199 5,367 17.8% 7% Warehouse 21,525 4 6,085 41 6,126 28.5% Storage Units 16,155 7 1,996 1,621 3,617 22.4% All Other Student Housing 16,110 2 - 6,786 6,786 42.1% 11% Plaza 1 5,241 8 2,455 5,161 7,616 50.0% Mixed Use Mobile Home Parks 5,283 1 - 110 110 2.1% 23% Office Restaurants 3,718 2 - 1,638 1,638 44.1% 13% Gas 1,058 0 - - - 0.0% Malls 857 5 62 685 747 87.2% Total 696,401 158 6 5,191 118,612 183,803 26.4% 21ADDITIONAL LOAN DETAIL – COMMERCIAL REAL ESTATE § Total commercial real estate loans of $696 million (22.9% of total loans) § Diversified by property type – highest concentrations are Apartments and Mixed Use, 8.2% and 4.5% of total loans, respectively § 26.4% in deferral – 35% interest only; 65% principal & interest § Average loan size of $1.2 million CRE BREAKOUT & MODIFICATION DETAIL (6/30/2020) CRE PORTFOLIO (6/30/2020) Deferral Detail 2020Q2 % in Student Housing Restaurants ($000) # of Loans I/O P&I Total Deferral Commercial Real Estate 4% 1% Storage Units Plaza 2% Warehouse Apartments 247,527 27 3 0,243 23,599 53,842 21.8% 4% 3% Mixed Use 137,300 29 1 0,845 3 0,499 4 1,344 30.1% Manufacturing Office 96,491 20 6,047 1 7,748 2 3,795 24.7% 3% All Other 6 7,952 32 6,607 12,682 19,289 28.4% Apartments Retail 37,102 16 683 1 2,843 1 3,526 36.5% 29% Retail Manufacturing 30,082 5 168 5,199 5,367 17.8% 7% Warehouse 21,525 4 6,085 41 6,126 28.5% Storage Units 16,155 7 1,996 1,621 3,617 22.4% All Other Student Housing 16,110 2 - 6,786 6,786 42.1% 11% Plaza 1 5,241 8 2,455 5,161 7,616 50.0% Mixed Use Mobile Home Parks 5,283 1 - 110 110 2.1% 23% Office Restaurants 3,718 2 - 1,638 1,638 44.1% 13% Gas 1,058 0 - - - 0.0% Malls 857 5 62 685 747 87.2% Total 696,401 158 6 5,191 118,612 183,803 26.4% 21

CONSERVATIVE CREDIT CULTURE JUNE 30, 2020 NONACCRUAL LOANS BY TYPE HISTORICAL NPAs/ASSETS & NCOs/LOANS CONSUMER 2.00% 1.7% 1.50% COMMERCIAL 33.4% 1.00% 0.69% 0.65% 0.60% 0.58% 0.44% 0.50% REAL ESTATE 0.27% 0.26% 0.26% 65.0% 0.24% 0.16% 0.00% 2016 2017 2018 2019 2020YTD NPAs/ASSETS (EX. TDRs) NCOs / AVERAGE LOANS HISTORICAL ASSET QUALITY 12/31/2016 12/31/2017 12/31/2018 12/31/2019 6/30/2020 NONACCRUAL LOANS $15,329 $19,232 $14,262 $21,736 $29,269 RESTRUCTURED LOANS $8,711 $8,344 $8,203 $7,359 $7,366 NONPERFORMING ASSETS $24,040 $27,576 $22,465 $29,095 $36,635 NONPERFORMING ASSETS (EX. TDRs) $15,329 $19,232 $14,262 $21,736 $29,269 NPAs / ASSETS 0.93% 1.00% 0.70% 0.77% 0.82% NPAs / ASSETS (EX. TDRs) 0.60% 0.69% 0.44% 0.58% 0.65% 22CONSERVATIVE CREDIT CULTURE JUNE 30, 2020 NONACCRUAL LOANS BY TYPE HISTORICAL NPAs/ASSETS & NCOs/LOANS CONSUMER 2.00% 1.7% 1.50% COMMERCIAL 33.4% 1.00% 0.69% 0.65% 0.60% 0.58% 0.44% 0.50% REAL ESTATE 0.27% 0.26% 0.26% 65.0% 0.24% 0.16% 0.00% 2016 2017 2018 2019 2020YTD NPAs/ASSETS (EX. TDRs) NCOs / AVERAGE LOANS HISTORICAL ASSET QUALITY 12/31/2016 12/31/2017 12/31/2018 12/31/2019 6/30/2020 NONACCRUAL LOANS $15,329 $19,232 $14,262 $21,736 $29,269 RESTRUCTURED LOANS $8,711 $8,344 $8,203 $7,359 $7,366 NONPERFORMING ASSETS $24,040 $27,576 $22,465 $29,095 $36,635 NONPERFORMING ASSETS (EX. TDRs) $15,329 $19,232 $14,262 $21,736 $29,269 NPAs / ASSETS 0.93% 1.00% 0.70% 0.77% 0.82% NPAs / ASSETS (EX. TDRs) 0.60% 0.69% 0.44% 0.58% 0.65% 22

ADDITIONAL CREDIT QUALITY DETAIL COMMERCIAL LOANS BY RISK RATING (6/30/2020) Special Mention Pass Substandard Doubtful Total Pass % Commercial, Industrial and Agricultural $1,226,388 $10,889 $26,244 $0 $1,263,521 97.1% Commercial Mortgages 818,811 13,465 33,125 0 865,401 94.6% Total $2,045,199 $24,354 $59,369 $0 $2,128,922 96.1% RESIDENTIAL, CONSUMER & CREDIT CARD – PERFORMING DETAIL (6/30/2020) Residential Credit Real Estate Consumer Cards Performing $801,106 $92,924 $6,748 Nonperforming 4,307 485 12 Total $805,413 $93,409 $6,760 23ADDITIONAL CREDIT QUALITY DETAIL COMMERCIAL LOANS BY RISK RATING (6/30/2020) Special Mention Pass Substandard Doubtful Total Pass % Commercial, Industrial and Agricultural $1,226,388 $10,889 $26,244 $0 $1,263,521 97.1% Commercial Mortgages 818,811 13,465 33,125 0 865,401 94.6% Total $2,045,199 $24,354 $59,369 $0 $2,128,922 96.1% RESIDENTIAL, CONSUMER & CREDIT CARD – PERFORMING DETAIL (6/30/2020) Residential Credit Real Estate Consumer Cards Performing $801,106 $92,924 $6,748 Nonperforming 4,307 485 12 Total $805,413 $93,409 $6,760 23

ALLOWANCE FOR LOAN LOSSES ALLOWANCE FOR LOAN LOSSES TRENDS OBSERVATIONS $24,529 § The company has elected to delay adoption of $25,000 1.00% the current expected credit loss accounting $20,000 0.80% standard pursuant to the Coronavirus Aid, Relief 0.81% and Economic Security (“CARES”) Act $15,000 0.60% § MRQ provision expense of $5.7 million was $10,000 0.40% 0.26% primarily driven by adjustments to the ALLL $5,000 0.20% qualitative factors related to economic growth and unemployment, to reflect management’s $0 0.00% assumptions of a continued significant impact of 2016 2017 2018 2019 2020YTD the pandemic ALL ALL / Total Loans NCOs / Average Loans HISTORICAL ALL ACTIVITY YEAR ENDED, QUARTER ENDED, (Dollars in Thousands) 12/31/2016 12/31/2017 12/31/2018 12/31/2019 3/31/2020 6/30/2020 Loan Loss Reserve ($000) Loan Loss Reserve - Beginning $ 16,737 $ 1 6,330 $ 1 9,693 $ 19,704 $ 1 9,473 $ 21,915 Charge-offs & Adj. 4,961 4,077 6 ,593 6,751 910 3,191 Recoveries 405 785 532 496 273 125 Provision 4 ,149 6,655 6,072 6,024 3,079 5,680 Loan Loss Reserve - Ending $ 16,330 $ 19,693 $ 19,704 $ 19,473 $ 21,915 $ 24,529 24ALLOWANCE FOR LOAN LOSSES ALLOWANCE FOR LOAN LOSSES TRENDS OBSERVATIONS $24,529 § The company has elected to delay adoption of $25,000 1.00% the current expected credit loss accounting $20,000 0.80% standard pursuant to the Coronavirus Aid, Relief 0.81% and Economic Security (“CARES”) Act $15,000 0.60% § MRQ provision expense of $5.7 million was $10,000 0.40% 0.26% primarily driven by adjustments to the ALLL $5,000 0.20% qualitative factors related to economic growth and unemployment, to reflect management’s $0 0.00% assumptions of a continued significant impact of 2016 2017 2018 2019 2020YTD the pandemic ALL ALL / Total Loans NCOs / Average Loans HISTORICAL ALL ACTIVITY YEAR ENDED, QUARTER ENDED, (Dollars in Thousands) 12/31/2016 12/31/2017 12/31/2018 12/31/2019 3/31/2020 6/30/2020 Loan Loss Reserve ($000) Loan Loss Reserve - Beginning $ 16,737 $ 1 6,330 $ 1 9,693 $ 19,704 $ 1 9,473 $ 21,915 Charge-offs & Adj. 4,961 4,077 6 ,593 6,751 910 3,191 Recoveries 405 785 532 496 273 125 Provision 4 ,149 6,655 6,072 6,024 3,079 5,680 Loan Loss Reserve - Ending $ 16,330 $ 19,693 $ 19,704 $ 19,473 $ 21,915 $ 24,529 24

COVID-19 RESPONSE LENDING & CREDIT § As of June 30, 2020, the Company had approved and secured funds with the Small Business Administration (“SBA”) for 1,898 Paycheck Protection Program(“PPP”) loans, representing approximately $226 million in loan outstanding and $8.8 million in service fees § As of June 30, 2020, deferred loan payment commitments totaled 1,463 loans, totaling $626 million § 64% principal & interest 36% interest only § 68% 5-6 months; 32% 1-4 months § On going credit review: § Quarterly reviews by an independent firm for an annual coverage minimum of 65% of the commercial loan portfolio, focus on ensuring proper risk ratings § Credit administration reviews 95% of the Company’s credit lines - approximately 1,600 § Weekly delinquency reports, monthly delinquency call with lenders and daily overdraft reports to monitor all aspects of the loan portfolio § Enhanced pandemic review: § Re-established loan pricing floors ranging from 4% to 5%, based on risk rating § More focus on: structure of loans; interest rate floors; getting more equity in the deals § Broke down portfolios of higher risk industries (i.e. restaurants, hotels, construction, oil & gas) and identified items such as breakdown of risk ratings, average loan size, breakdown by Division, flags, etc. § Continued contact with our customers, especially those with a PPP loan or granted loan relief (i.e. interest only or P&I deferment) § For borrowers needing additional relief, CCNE is obtaining updated financials, conducting in-depth analysis with the customer and understanding their business plan moving forward 25COVID-19 RESPONSE LENDING & CREDIT § As of June 30, 2020, the Company had approved and secured funds with the Small Business Administration (“SBA”) for 1,898 Paycheck Protection Program(“PPP”) loans, representing approximately $226 million in loan outstanding and $8.8 million in service fees § As of June 30, 2020, deferred loan payment commitments totaled 1,463 loans, totaling $626 million § 64% principal & interest 36% interest only § 68% 5-6 months; 32% 1-4 months § On going credit review: § Quarterly reviews by an independent firm for an annual coverage minimum of 65% of the commercial loan portfolio, focus on ensuring proper risk ratings § Credit administration reviews 95% of the Company’s credit lines - approximately 1,600 § Weekly delinquency reports, monthly delinquency call with lenders and daily overdraft reports to monitor all aspects of the loan portfolio § Enhanced pandemic review: § Re-established loan pricing floors ranging from 4% to 5%, based on risk rating § More focus on: structure of loans; interest rate floors; getting more equity in the deals § Broke down portfolios of higher risk industries (i.e. restaurants, hotels, construction, oil & gas) and identified items such as breakdown of risk ratings, average loan size, breakdown by Division, flags, etc. § Continued contact with our customers, especially those with a PPP loan or granted loan relief (i.e. interest only or P&I deferment) § For borrowers needing additional relief, CCNE is obtaining updated financials, conducting in-depth analysis with the customer and understanding their business plan moving forward 25

COVID-19 LOAN MODIFICATIONS LOAN MODIFICATIONS BY INDUSTRY ($ in thousands) Loans with Deferred Payments Portfolio Portfolio # of Interest % of Q2 2020 Q2 2020 Loans Only P&I Total Portfolio Loan Modifications by Industry Commercial Real Estate $696,401 22.9% 158 $65,191 $118,612 $183,803 26% Hospitality 181,413 6.0% 51 140 161,389 1 61,529 89% Residential and Consumer 905,866 29.8% 777 54,846 19,351 74,197 8% Manufacturing 185,457 6.1% 84 36,764 3,906 40,670 22% Health Care and Social Assistance 169,962 5.6% 47 4,728 28,358 33,086 19% Arts, Entertainment and Recreation 35,587 1.2% 25 41 26,306 26,347 74% Utilities 22,373 0.7% 2 19,526 - 19,526 87% Retail Trade 99,815 3.3% 47 14,094 2,788 16,882 17% Professional, Scientific, and Techincal Services 70,743 2.3% 16 11,875 2,057 13,932 20% Food Services and Drinking Places 35,626 1.2% 53 1,174 12,154 13,328 37% Other Services 68,302 2.3% 58 4,292 5,787 10,079 15% Construction 119,322 3.9% 26 817 6,114 6,931 6% Agriculture, Forestry, Fishing and Hunting 61,704 2.0% 19 5,931 965 6,896 11% Finance and Insurance 46,262 1.5% 3 251 6,342 6,593 14% Mining, Quarrying and Oil and Gas Extraction 24,745 0.8% 21 922 4,032 4,954 20% Transportation and Warehousing 29,934 1.0% 37 3,014 559 3,573 12% Wholesale Trade 57,121 1.9% 19 1,161 1,879 3,040 5% Administrative & Support & Waste Mgt & Remediation Svc. 38,513 1.3% 16 148 304 452 1% Information 11,132 0.4% 2 326 - 326 3% Educational Services 10,860 0.4% 2 - 284 284 3% Other 163,650 5.4% 0 - - - 0% Total $3,034,788 100.0% 1,463 $225,241 $401,187 $626,428 21% 26 Note: Data as of June 30, 2020COVID-19 LOAN MODIFICATIONS LOAN MODIFICATIONS BY INDUSTRY ($ in thousands) Loans with Deferred Payments Portfolio Portfolio # of Interest % of Q2 2020 Q2 2020 Loans Only P&I Total Portfolio Loan Modifications by Industry Commercial Real Estate $696,401 22.9% 158 $65,191 $118,612 $183,803 26% Hospitality 181,413 6.0% 51 140 161,389 1 61,529 89% Residential and Consumer 905,866 29.8% 777 54,846 19,351 74,197 8% Manufacturing 185,457 6.1% 84 36,764 3,906 40,670 22% Health Care and Social Assistance 169,962 5.6% 47 4,728 28,358 33,086 19% Arts, Entertainment and Recreation 35,587 1.2% 25 41 26,306 26,347 74% Utilities 22,373 0.7% 2 19,526 - 19,526 87% Retail Trade 99,815 3.3% 47 14,094 2,788 16,882 17% Professional, Scientific, and Techincal Services 70,743 2.3% 16 11,875 2,057 13,932 20% Food Services and Drinking Places 35,626 1.2% 53 1,174 12,154 13,328 37% Other Services 68,302 2.3% 58 4,292 5,787 10,079 15% Construction 119,322 3.9% 26 817 6,114 6,931 6% Agriculture, Forestry, Fishing and Hunting 61,704 2.0% 19 5,931 965 6,896 11% Finance and Insurance 46,262 1.5% 3 251 6,342 6,593 14% Mining, Quarrying and Oil and Gas Extraction 24,745 0.8% 21 922 4,032 4,954 20% Transportation and Warehousing 29,934 1.0% 37 3,014 559 3,573 12% Wholesale Trade 57,121 1.9% 19 1,161 1,879 3,040 5% Administrative & Support & Waste Mgt & Remediation Svc. 38,513 1.3% 16 148 304 452 1% Information 11,132 0.4% 2 326 - 326 3% Educational Services 10,860 0.4% 2 - 284 284 3% Other 163,650 5.4% 0 - - - 0% Total $3,034,788 100.0% 1,463 $225,241 $401,187 $626,428 21% 26 Note: Data as of June 30, 2020

COVID-19 LOAN MODIFICATIONS § Total modified loans comprised 21% of the total loan portfolio outstanding as of June 30, 2020 § Modifications are 64% Principal & Interest, 36% Principal only § Modifications are 68% for 5-6 months and 32% for 1-4 months LOAN MODIFICATIONS BY REGION BANKONBUFFALO CNB BANK 19% 28% ($ in millions) CNB Bank ERIEBANK FCBank BankOnBuffalo Total FCBANK Deferred loans $177 $195 $136 $119 $626 22% ERIEBANK # of deferred loans 608 671 106 78 1,463 31% CONSUMER 0% RESIDENTIAL LOAN MODIFICATIONS BY CATEGORY 12% C&I 32% Commercial & Commercial Residential Industrial Real Estate Mortgage Consumer Total ($ in millions) Deferred loans $201 $351 $72 $2 $626 CRE 56% # of deferred loans 503 183 595 182 1,463 27 Note: Data as of June 30, 2020COVID-19 LOAN MODIFICATIONS § Total modified loans comprised 21% of the total loan portfolio outstanding as of June 30, 2020 § Modifications are 64% Principal & Interest, 36% Principal only § Modifications are 68% for 5-6 months and 32% for 1-4 months LOAN MODIFICATIONS BY REGION BANKONBUFFALO CNB BANK 19% 28% ($ in millions) CNB Bank ERIEBANK FCBank BankOnBuffalo Total FCBANK Deferred loans $177 $195 $136 $119 $626 22% ERIEBANK # of deferred loans 608 671 106 78 1,463 31% CONSUMER 0% RESIDENTIAL LOAN MODIFICATIONS BY CATEGORY 12% C&I 32% Commercial & Commercial Residential Industrial Real Estate Mortgage Consumer Total ($ in millions) Deferred loans $201 $351 $72 $2 $626 CRE 56% # of deferred loans 503 183 595 182 1,463 27 Note: Data as of June 30, 2020

SBA PPP LOANS SBA PAYCHECK PROTECTION PROGRAM (PPP) BY REGION (AS OF JUNE 30, 2020) ($ in thousands) CNB Bank ERIEBANK FCBank BankOnBuffalo Total SBA approved loans $63,498 $80,141 $36,696 $45,458 $225,793 # of SBA approved loans 579 780 193 346 1,898 Average size per loan $110 $103 $190 $130 $119 Processing fees $2,455 $3,385 $1,262 $1,735 $8,837 Processing fees (%) 3.87% 4.22% 3.44% 3.82% 3.91% § Over 30,000 employees are estimated to benefit at companies receiving funds from the Company through the PPP 28 Note: Data as of June 30, 2020SBA PPP LOANS SBA PAYCHECK PROTECTION PROGRAM (PPP) BY REGION (AS OF JUNE 30, 2020) ($ in thousands) CNB Bank ERIEBANK FCBank BankOnBuffalo Total SBA approved loans $63,498 $80,141 $36,696 $45,458 $225,793 # of SBA approved loans 579 780 193 346 1,898 Average size per loan $110 $103 $190 $130 $119 Processing fees $2,455 $3,385 $1,262 $1,735 $8,837 Processing fees (%) 3.87% 4.22% 3.44% 3.82% 3.91% § Over 30,000 employees are estimated to benefit at companies receiving funds from the Company through the PPP 28 Note: Data as of June 30, 2020

ADDITIONAL LOAN DETAIL – HOSPITALITY / HOTELS HOSPITALITY LOANS BY CATEGORY (6/30/20) HOSPITALITY/HOTELS LOAN PORTFOLIO INDEPENDENT 2% § Franchise hotels comprise 98% of total hotel portfolio as of 6/30/20 OTHER § Resort or destination related hospitality sites comprise BRANDED 13% approximately 1% of the total hotel portfolio as of 6/30/20 HILTON IHG § Prioritize tier 1 preferred franchises: Hilton and 43% 14% $181M Marriott § Secondarily tier 2 franchises: Holiday Inn and Choice § Prioritize limited service hotels with 60 – 150 rooms MARRIOTT § 92.1% pass rated 28% § Average LTV of 57% ADDITIONAL DETAIL AS OF 6/30/2020 # of Outstanding Average Past Non- $ in Thousands Loans Balance Loan Size Due Performing Independent 19 $3,383 $178 0.0% $1,586 Franchised 76 178,030 2,343 0.0% 0 Total Hospitality Loans 95 $181,413 $1,910 0.0% $1,586 29ADDITIONAL LOAN DETAIL – HOSPITALITY / HOTELS HOSPITALITY LOANS BY CATEGORY (6/30/20) HOSPITALITY/HOTELS LOAN PORTFOLIO INDEPENDENT 2% § Franchise hotels comprise 98% of total hotel portfolio as of 6/30/20 OTHER § Resort or destination related hospitality sites comprise BRANDED 13% approximately 1% of the total hotel portfolio as of 6/30/20 HILTON IHG § Prioritize tier 1 preferred franchises: Hilton and 43% 14% $181M Marriott § Secondarily tier 2 franchises: Holiday Inn and Choice § Prioritize limited service hotels with 60 – 150 rooms MARRIOTT § 92.1% pass rated 28% § Average LTV of 57% ADDITIONAL DETAIL AS OF 6/30/2020 # of Outstanding Average Past Non- $ in Thousands Loans Balance Loan Size Due Performing Independent 19 $3,383 $178 0.0% $1,586 Franchised 76 178,030 2,343 0.0% 0 Total Hospitality Loans 95 $181,413 $1,910 0.0% $1,586 29

ADDITIONAL LOAN DETAIL § At June 30, 2020, the Company had $159 million in funded ADC loans (excluding the previously mentioned Hotels/Motels and Restaurants/Fast Foods), or 5.6% of total loans outstanding, excluding PPP, and unfunded commitments for ADC loans of $160 million § The ADC portfolio by industry classification, excluding the Hotels/Motels and Restaurants/Fast Foods industries, is as follows: Funded Commitment ($M) Unfunded Commitment ($M) Multi-Family Real Estate $66.4 $79.1 Real Estate Developers $30.3 $42.7 Mixed Use Real Estate $21.2 $21.2 All Others $40.7 $17.0 § The Company has a small exposure to the retail industry, with loans outstanding of $99.8 million, or 3.3%, of total loans at June 30, 2020 of which 98.5% are pass rated § The Company has a negligible exposure to the restaurant industry, with loans outstanding of $35.6 million, or 1.2%, of total loans at June 30, 2020 of which 99.2% are pass rated § The Company has a negligible exposure to the oil & gas industry, with loans outstanding of $15.4 million, or 0.5%, of total loans, excluding PPP, at June 30, 2020 30ADDITIONAL LOAN DETAIL § At June 30, 2020, the Company had $159 million in funded ADC loans (excluding the previously mentioned Hotels/Motels and Restaurants/Fast Foods), or 5.6% of total loans outstanding, excluding PPP, and unfunded commitments for ADC loans of $160 million § The ADC portfolio by industry classification, excluding the Hotels/Motels and Restaurants/Fast Foods industries, is as follows: Funded Commitment ($M) Unfunded Commitment ($M) Multi-Family Real Estate $66.4 $79.1 Real Estate Developers $30.3 $42.7 Mixed Use Real Estate $21.2 $21.2 All Others $40.7 $17.0 § The Company has a small exposure to the retail industry, with loans outstanding of $99.8 million, or 3.3%, of total loans at June 30, 2020 of which 98.5% are pass rated § The Company has a negligible exposure to the restaurant industry, with loans outstanding of $35.6 million, or 1.2%, of total loans at June 30, 2020 of which 99.2% are pass rated § The Company has a negligible exposure to the oil & gas industry, with loans outstanding of $15.4 million, or 0.5%, of total loans, excluding PPP, at June 30, 2020 30

DEPOSIT MIX 6/30/2020 DEPOSIT MIX AVERAGE DEPOSITS PER BRANCH $100,000 $80,158 $80,000 $73,872 SAVINGS $62,172 52.3% $60,000 $52,884 $48,087 $40,000 TIME DEPOSITS 11.2% $20,000 $0 DEMAND - DEMAND - NONINTEREST 2016 2017 2018 2019 2020YTD INTEREST 14.1% 22.4% OBSERVATIONS § Total deposits of $3.6 billion include an estimated $217 million in estimated PPP deposits Deposit Composition § Excluding estimated PPP deposits, deposits grew 23.6%, ($000) 2016Y 2017Y 2018Y 2019Y 2020Q2 compared to June 30, 2019 Demand - Noninterest Bearing $289,922 $321,858 $356,797 $382,259 $507,236§ Overall increase in deposits driven primarily by Private Banking Division which grew deposits $163 million or 39.4% Demand - Interest Bearing 543,388 565,399 600,046 628,579 806,638 compared to June 30, 2019 Savings 953,438 915,587 1,258,506 1,663,673 1,880,252 § Buffalo deposits increased by $204 million, or 57.7%, compared to June 30, 2019 Time Deposits 230,774 364,971 395,437 427,816 401,896 § MRQ cost of deposits of 0.81% Total Deposits $2,017,522 $2,167,815 $2,610,786 $3,102,327 $3,596,022 31 AVG. DEPOSITS PER BRANCH ($000)DEPOSIT MIX 6/30/2020 DEPOSIT MIX AVERAGE DEPOSITS PER BRANCH $100,000 $80,158 $80,000 $73,872 SAVINGS $62,172 52.3% $60,000 $52,884 $48,087 $40,000 TIME DEPOSITS 11.2% $20,000 $0 DEMAND - DEMAND - NONINTEREST 2016 2017 2018 2019 2020YTD INTEREST 14.1% 22.4% OBSERVATIONS § Total deposits of $3.6 billion include an estimated $217 million in estimated PPP deposits Deposit Composition § Excluding estimated PPP deposits, deposits grew 23.6%, ($000) 2016Y 2017Y 2018Y 2019Y 2020Q2 compared to June 30, 2019 Demand - Noninterest Bearing $289,922 $321,858 $356,797 $382,259 $507,236§ Overall increase in deposits driven primarily by Private Banking Division which grew deposits $163 million or 39.4% Demand - Interest Bearing 543,388 565,399 600,046 628,579 806,638 compared to June 30, 2019 Savings 953,438 915,587 1,258,506 1,663,673 1,880,252 § Buffalo deposits increased by $204 million, or 57.7%, compared to June 30, 2019 Time Deposits 230,774 364,971 395,437 427,816 401,896 § MRQ cost of deposits of 0.81% Total Deposits $2,017,522 $2,167,815 $2,610,786 $3,102,327 $3,596,022 31 AVG. DEPOSITS PER BRANCH ($000)

OFFERING IMPACTOFFERING IMPACT

ILLUSTRATIVE IMPACT OF THE PROPOSED OFFERING CNB FINANCIAL CORPORATION – PRO FORMA CAPITAL RATIOS 13.8% 13.1% 12.3% 11.4% 10.5% 9.9% 8.6% 8.3% 7.9% 7.6% 7.5% 7.2% (1) Tier 1 Leverage Ratio Tier 1 Leverage Ratio - Adjusted for PPP Tier 1 Risk Based Total Risk Based June 30, 2020 (Actual) As Adjusted for Bank of Akron As Adjusted for Bank of Akron and this Offering (1) Excludes the impact of loans and/or deposits made pursuant to the Paycheck Protection Program (“PPP”) and the Paycheck Protection Program Lending Facility (“PPPLF”), as applicable. Note: Assumes $50 million gross offering size 33 Note: All offering assumptions are for illustrative purposes only; See “Caution Regarding Forward Looking Statements” ILLUSTRATIVE IMPACT OF THE PROPOSED OFFERING CNB FINANCIAL CORPORATION – PRO FORMA CAPITAL RATIOS 13.8% 13.1% 12.3% 11.4% 10.5% 9.9% 8.6% 8.3% 7.9% 7.6% 7.5% 7.2% (1) Tier 1 Leverage Ratio Tier 1 Leverage Ratio - Adjusted for PPP Tier 1 Risk Based Total Risk Based June 30, 2020 (Actual) As Adjusted for Bank of Akron As Adjusted for Bank of Akron and this Offering (1) Excludes the impact of loans and/or deposits made pursuant to the Paycheck Protection Program (“PPP”) and the Paycheck Protection Program Lending Facility (“PPPLF”), as applicable. Note: Assumes $50 million gross offering size 33 Note: All offering assumptions are for illustrative purposes only; See “Caution Regarding Forward Looking Statements”

ILLUSTRATIVE IMPACT OF THE PROPOSED OFFERING PREFERRED DIVIDEND COVERAGE PRO FORMA 2Q2020 LTM 2Q2020 LTM INTEREST COVERAGE Earnings Net Income $37,900 $37,900 Preferred Dividend $0 $3,563 Net Income to Common $37,900 $34,338 Net Income / Preferred Dividend 10.6x 34 Note: Assumes $50 million gross offering at 7.125%; All offering assumptions are for illustrative purposes only ILLUSTRATIVE IMPACT OF THE PROPOSED OFFERING PREFERRED DIVIDEND COVERAGE PRO FORMA 2Q2020 LTM 2Q2020 LTM INTEREST COVERAGE Earnings Net Income $37,900 $37,900 Preferred Dividend $0 $3,563 Net Income to Common $37,900 $34,338 Net Income / Preferred Dividend 10.6x 34 Note: Assumes $50 million gross offering at 7.125%; All offering assumptions are for illustrative purposes only

DIVIDEND HISTORY HISTORICAL DIVIDEND PER COMMON SHARE $0.800 $0.700 $0.600 $0.500 $0.400 $0.300 $0.200 $0.100 $0.000 Common Dividend Special Dividend 35DIVIDEND HISTORY HISTORICAL DIVIDEND PER COMMON SHARE $0.800 $0.700 $0.600 $0.500 $0.400 $0.300 $0.200 $0.100 $0.000 Common Dividend Special Dividend 35

APPENDIX ADDITIONAL FINANCIAL DETAILAPPENDIX ADDITIONAL FINANCIAL DETAIL

CNB FINANCIAL CORP. FINANCIAL HIGHLIGHTS For the Twelve Months Ended Quarters Ended In $000s except for per share data 12/31/2017 12/31/2018 12/31/2019 09/30/19 12/31/19 03/31/20 06/30/20 Balance Sheet Total Assets $2,768,773 $3,221,521 $3,763,659 $3,541,170 $3,763,659 $3,779,138 $4,469,551 Total Gross Loans $2,145,959 $2,474,557 $2,804,035 $2,749,502 $2,804,035 $2,850,660 $3,030,171 Total Deposits $2,167,815 $2,610,786 $3,102,327 $2,875,595 $3,102,327 $3,100,216 $3,596,022 Loans/Deposits 99.0% 94.8% 90.4% 95.6% 90.4% 92.0% 84.3% Capital Common Equity $243,910 $262,830 $304,966 $297,033 $304,966 $324,802 $330,272 Preferred Equity $0 $0 $0 $0 $0 $0 $0 Total Equity/Assets 8.81% 8.16% 8.10% 8.39% 8.10% 8.59% 7.39% Tang. Common Equity/Tang. Assets 7.46% 7.02% 7.14% 7.37% 7.14% 7.65% 6.58% Tangible Equity/Tangible Assets 7.46% 7.02% 7.14% 7.37% 7.14% 7.65% 6.58% Tier 1 Capital 10.97% 10.33% 10.03% 10.02% 10.03% 10.15% 10.48% Leverage Ratio 8.45% 9.12% 7.86% 7.95% 7.86% 7.85% 7.55% Profitability Measures Net Interest Margin 3.82% 3.76% 3.69% 3.72% 3.54% 3.49% 3.14% Non Interest Income/Average Assets 0.80% 0.69% 0.76% 0.72% 0.74% 0.58% 0.77% Non Interest Expense/Average Assets 2.62% 2.64% 2.56% 2.46% 2.51% 2.33% 2.15% ROAA 0.89% 1.12% 1.17% 1.19% 1.15% 0.95% 0.80% ROAE 9.97% 13.46% 14.05% 14.03% 13.79% 11.32% 10.30% Earnings per share $1.57 $2.21 $2.63 $0.68 $0.69 $0.57 $0.54 Net Income $23,860 $33,719 $40,081 $10,357 $10,484 $8,813 $8,246 Asset Quality NPAs/Assets 1.00% 0.70% 0.77% 0.48% 0.77% 0.89% 0.82% NPAs (excl TDRs)/Assets 0.69% 0.44% 0.58% 0.42% 0.58% 0.84% 0.65% NCOs/Avg Loans 0.16% 0.26% 0.24% 0.12% 0.06% 0.02% 0.10% Reserves/Loans 0.92% 0.80% 0.69% 0.73% 0.69% 0.77% 0.81% Reserves/NPAs 71.41% 87.72% 66.93% 120.05% 66.93% 65.35% 66.96% 37 Note: Tangible common equity is a non-GAAP financial measure; See appendix for GAAP to non-GAAP reconciliation CNB FINANCIAL CORP. FINANCIAL HIGHLIGHTS For the Twelve Months Ended Quarters Ended In $000s except for per share data 12/31/2017 12/31/2018 12/31/2019 09/30/19 12/31/19 03/31/20 06/30/20 Balance Sheet Total Assets $2,768,773 $3,221,521 $3,763,659 $3,541,170 $3,763,659 $3,779,138 $4,469,551 Total Gross Loans $2,145,959 $2,474,557 $2,804,035 $2,749,502 $2,804,035 $2,850,660 $3,030,171 Total Deposits $2,167,815 $2,610,786 $3,102,327 $2,875,595 $3,102,327 $3,100,216 $3,596,022 Loans/Deposits 99.0% 94.8% 90.4% 95.6% 90.4% 92.0% 84.3% Capital Common Equity $243,910 $262,830 $304,966 $297,033 $304,966 $324,802 $330,272 Preferred Equity $0 $0 $0 $0 $0 $0 $0 Total Equity/Assets 8.81% 8.16% 8.10% 8.39% 8.10% 8.59% 7.39% Tang. Common Equity/Tang. Assets 7.46% 7.02% 7.14% 7.37% 7.14% 7.65% 6.58% Tangible Equity/Tangible Assets 7.46% 7.02% 7.14% 7.37% 7.14% 7.65% 6.58% Tier 1 Capital 10.97% 10.33% 10.03% 10.02% 10.03% 10.15% 10.48% Leverage Ratio 8.45% 9.12% 7.86% 7.95% 7.86% 7.85% 7.55% Profitability Measures Net Interest Margin 3.82% 3.76% 3.69% 3.72% 3.54% 3.49% 3.14% Non Interest Income/Average Assets 0.80% 0.69% 0.76% 0.72% 0.74% 0.58% 0.77% Non Interest Expense/Average Assets 2.62% 2.64% 2.56% 2.46% 2.51% 2.33% 2.15% ROAA 0.89% 1.12% 1.17% 1.19% 1.15% 0.95% 0.80% ROAE 9.97% 13.46% 14.05% 14.03% 13.79% 11.32% 10.30% Earnings per share $1.57 $2.21 $2.63 $0.68 $0.69 $0.57 $0.54 Net Income $23,860 $33,719 $40,081 $10,357 $10,484 $8,813 $8,246 Asset Quality NPAs/Assets 1.00% 0.70% 0.77% 0.48% 0.77% 0.89% 0.82% NPAs (excl TDRs)/Assets 0.69% 0.44% 0.58% 0.42% 0.58% 0.84% 0.65% NCOs/Avg Loans 0.16% 0.26% 0.24% 0.12% 0.06% 0.02% 0.10% Reserves/Loans 0.92% 0.80% 0.69% 0.73% 0.69% 0.77% 0.81% Reserves/NPAs 71.41% 87.72% 66.93% 120.05% 66.93% 65.35% 66.96% 37 Note: Tangible common equity is a non-GAAP financial measure; See appendix for GAAP to non-GAAP reconciliation

CNB BANK FINANCIAL HIGHLIGHTS For the Twelve Months Ended Quarters Ended In $000s except for per share data 12/31/2017 12/31/2018 12/31/2019 9/30/2019 12/31/2019 3/31/2020 6/30/2020 Balance Sheet Total Assets $2,748,891 $3,203,027 $3,740,508 $3,519,206 $3,740,508 $3,753,504 $4,451,130 Total Loans $2,139,363 $2,467,461 $2,797,193 $2,743,303 $2,797,193 $2,845,359 $3,030,417 Total Deposits $2,168,236 $2,611,214 $3,102,630 $2,876,008 $3,102,630 $3,102,491 $3,607,098 Loans/Deposits 98.67% 94.49% 90.16% 95.39% 90.16% 91.71% 84.01% Capital Common Equity $290,156 $310,574 $349,307 $342,493 $349,307 $364,733 $369,625 Total Equity/Assets 10.56% 9.70% 9.34% 9.72% 9.34% 9.72% 8.30% Risked Based Capital 13.58% 12.59% 11.87% 11.98% 11.87% 11.86% 12.25% Tier 1 Capital 12.70% 11.85% 11.24% 11.30% 11.24% 11.15% 11.45% Leverage Ratio 9.80% 9.12% 8.79% 8.96% 8.79% 8.62% 8.25% Profitability Measures Net Interest Margin 3.62% 3.62% 3.63% 3.72% 3.62% 3.55% 3.40% Non Interest Income/Avg. Assets 0.66% 0.64% 0.67% 0.67% 0.63% 0.54% 0.52% Non Interest Expense/Avg. Assets 2.51% 2.56% 2.52% 2.49% 2.48% 2.25% 2.06% Efficiency Ratio 58.00% 60.20% 60.49% 58.99% 61.86% 59.18% 59.27% ROAA 0.99% 1.21% 1.19% 1.20% 1.17% 0.98% 0.86% ROAE 9.31% 12.13% 12.14% 12.20% 12.14% 10.24% 9.72% Net Income $26,271 $36,061 $40,276 $10,303 $10,501 $9,142 $8,920 Asset Quality NPAs/Assets 1.00% 0.70% 0.65% 0.64% 0.65% 1.07% 0.84% NPAs (excl TDRs)/Assets 0.70% 0.45% 0.47% 0.44% 0.47% 0.88% 0.67% NCOs/Avg Loans 0.06% 0.17% 0.16% 0.43% 0.15% 0.02% 0.37% Reserves/Loans 0.84% 0.73% 0.63% 0.67% 0.63% 0.71% 0.75% Reserves/NPAs 65.40% 80.12% 71.74% 81.76% 71.74% 50.32% 61.12% 38CNB BANK FINANCIAL HIGHLIGHTS For the Twelve Months Ended Quarters Ended In $000s except for per share data 12/31/2017 12/31/2018 12/31/2019 9/30/2019 12/31/2019 3/31/2020 6/30/2020 Balance Sheet Total Assets $2,748,891 $3,203,027 $3,740,508 $3,519,206 $3,740,508 $3,753,504 $4,451,130 Total Loans $2,139,363 $2,467,461 $2,797,193 $2,743,303 $2,797,193 $2,845,359 $3,030,417 Total Deposits $2,168,236 $2,611,214 $3,102,630 $2,876,008 $3,102,630 $3,102,491 $3,607,098 Loans/Deposits 98.67% 94.49% 90.16% 95.39% 90.16% 91.71% 84.01% Capital Common Equity $290,156 $310,574 $349,307 $342,493 $349,307 $364,733 $369,625 Total Equity/Assets 10.56% 9.70% 9.34% 9.72% 9.34% 9.72% 8.30% Risked Based Capital 13.58% 12.59% 11.87% 11.98% 11.87% 11.86% 12.25% Tier 1 Capital 12.70% 11.85% 11.24% 11.30% 11.24% 11.15% 11.45% Leverage Ratio 9.80% 9.12% 8.79% 8.96% 8.79% 8.62% 8.25% Profitability Measures Net Interest Margin 3.62% 3.62% 3.63% 3.72% 3.62% 3.55% 3.40% Non Interest Income/Avg. Assets 0.66% 0.64% 0.67% 0.67% 0.63% 0.54% 0.52% Non Interest Expense/Avg. Assets 2.51% 2.56% 2.52% 2.49% 2.48% 2.25% 2.06% Efficiency Ratio 58.00% 60.20% 60.49% 58.99% 61.86% 59.18% 59.27% ROAA 0.99% 1.21% 1.19% 1.20% 1.17% 0.98% 0.86% ROAE 9.31% 12.13% 12.14% 12.20% 12.14% 10.24% 9.72% Net Income $26,271 $36,061 $40,276 $10,303 $10,501 $9,142 $8,920 Asset Quality NPAs/Assets 1.00% 0.70% 0.65% 0.64% 0.65% 1.07% 0.84% NPAs (excl TDRs)/Assets 0.70% 0.45% 0.47% 0.44% 0.47% 0.88% 0.67% NCOs/Avg Loans 0.06% 0.17% 0.16% 0.43% 0.15% 0.02% 0.37% Reserves/Loans 0.84% 0.73% 0.63% 0.67% 0.63% 0.71% 0.75% Reserves/NPAs 65.40% 80.12% 71.74% 81.76% 71.74% 50.32% 61.12% 38

BANK OF AKRON FINANCIAL HIGHLIGHTS For the Twelve Months Ended Quarters Ended In $000s except for per share data 12/31/2017 12/31/2018 12/31/2019 9/30/2019 12/31/2019 3/31/2020 6/30/2020 Balance Sheet Total Assets $321,286 $349,552 $388,365 $388,877 $388,365 $406,490 $471,221 Total Loans $261,306 $291,380 $321,551 $313,389 $321,551 $327,258 $329,001 Total Deposits $277,704 $299,093 $341,404 $339,733 $341,404 $360,758 $425,696 Loans/Deposits 94.10% 97.42% 94.18% 92.25% 94.18% 90.71% 77.29% Capital Common Equity $32,637 $34,961 $38,752 $38,419 $38,752 $39,550 $40,279 Total Equity/Assets 10.16% 10.00% 9.98% 9.88% 9.98% 9.73% 8.55% Risked Based Capital 13.31% 13.03% 13.12% 13.19% 13.12% 13.24% 13.51% Tier 1 Capital 11.78% 11.59% 11.87% 11.85% 11.87% 11.98% 12.25% Leverage Ratio 9.77% 9.83% 9.87% 9.73% 9.87% 9.70% 8.87% Profitability Measures Net Interest Margin 4.03% 4.13% 3.88% 3.84% 3.73% 3.76% 3.32% Non Interest Income/Avg. Assets 0.46% 0.44% 0.36% 0.37% 0.36% 0.33% 0.27% Non Interest Expense/Avg. Assets 2.90% 2.88% 2.84% 2.71% 3.11% 2.96% 2.26% Efficiency Ratio 65.78% 65.11% 68.91% 66.01% 78.09% 75.24% 66.96% ROAA 1.47% 1.13% 1.09% 1.74% 0.23% 0.66% 0.66% ROAE 15.76% 11.09% 10.93% 17.57% 2.34% 6.76% 7.34% Net Income $4,607 $3,769 $4,077 $1,669 $226 $662 $732 Asset Quality NPAs/Assets 2.58% 1.37% 0.98% 1.25% 0.98% 1.04% 0.66% NPAs (excl TDRs)/Assets 1.81% 0.98% 0.63% 0.91% 0.63% 0.67% 0.62% NCOs/Avg Loans 0.09% 0.19% 0.31% 0.01% 1.23% 0.03% -0.08% Reserves/Loans 2.19% 1.91% 1.55% 1.87% 1.55% 1.55% 1.66% Reserves/NPAs 69.00% 116.15% 131.36% 120.24% 131.36% 120.19% 176.92% 39BANK OF AKRON FINANCIAL HIGHLIGHTS For the Twelve Months Ended Quarters Ended In $000s except for per share data 12/31/2017 12/31/2018 12/31/2019 9/30/2019 12/31/2019 3/31/2020 6/30/2020 Balance Sheet Total Assets $321,286 $349,552 $388,365 $388,877 $388,365 $406,490 $471,221 Total Loans $261,306 $291,380 $321,551 $313,389 $321,551 $327,258 $329,001 Total Deposits $277,704 $299,093 $341,404 $339,733 $341,404 $360,758 $425,696 Loans/Deposits 94.10% 97.42% 94.18% 92.25% 94.18% 90.71% 77.29% Capital Common Equity $32,637 $34,961 $38,752 $38,419 $38,752 $39,550 $40,279 Total Equity/Assets 10.16% 10.00% 9.98% 9.88% 9.98% 9.73% 8.55% Risked Based Capital 13.31% 13.03% 13.12% 13.19% 13.12% 13.24% 13.51% Tier 1 Capital 11.78% 11.59% 11.87% 11.85% 11.87% 11.98% 12.25% Leverage Ratio 9.77% 9.83% 9.87% 9.73% 9.87% 9.70% 8.87% Profitability Measures Net Interest Margin 4.03% 4.13% 3.88% 3.84% 3.73% 3.76% 3.32% Non Interest Income/Avg. Assets 0.46% 0.44% 0.36% 0.37% 0.36% 0.33% 0.27% Non Interest Expense/Avg. Assets 2.90% 2.88% 2.84% 2.71% 3.11% 2.96% 2.26% Efficiency Ratio 65.78% 65.11% 68.91% 66.01% 78.09% 75.24% 66.96% ROAA 1.47% 1.13% 1.09% 1.74% 0.23% 0.66% 0.66% ROAE 15.76% 11.09% 10.93% 17.57% 2.34% 6.76% 7.34% Net Income $4,607 $3,769 $4,077 $1,669 $226 $662 $732 Asset Quality NPAs/Assets 2.58% 1.37% 0.98% 1.25% 0.98% 1.04% 0.66% NPAs (excl TDRs)/Assets 1.81% 0.98% 0.63% 0.91% 0.63% 0.67% 0.62% NCOs/Avg Loans 0.09% 0.19% 0.31% 0.01% 1.23% 0.03% -0.08% Reserves/Loans 2.19% 1.91% 1.55% 1.87% 1.55% 1.55% 1.66% Reserves/NPAs 69.00% 116.15% 131.36% 120.24% 131.36% 120.19% 176.92% 39

NON-INTEREST INCOME ND NONINTEREST INCOME DETAIL – FISCAL YEAR 2019 & 2 QUARTER 2020 YTD § Diversified sources of noninterest income contribute meaningfully to total revenue 45% § Largest noninterest income driver is service charges and fees of 2020YTD pre- § Additionally, wealth management and core processing / interchange income provision net revenue contribute significantly to total noninterest income FY2019 2020YTD NONINTEREST INCOME: ($000) % OF NII ($000) % of NII Service charges on deposit accounts $6,402 24.6% $2,451 18.4% Other service charges and fees $2,930 11.3% $1,196 9.0% Wealth and asset management fees $4,627 17.8% $2,667 20.0% Net realized gains on AFS securities $148 0.6% $2,190 16.5% Net realized gains on trading securities $16 0.1% $0 0.0% Net unrealized gains (losses) on trading securities $1,872 7.2% ($282) -2.1% Realized gains on Visa Class B Shares $463 1.8% $0 0.0% Mortgage banking $1,412 5.4% $1,001 7.5% Bank owned life insurance $1,317 5.1% $865 6.5% Card processing and interchange income $4,641 17.9% $2,453 18.4% Other noninterest income $2,147 8.3% $772 5.8% Total noninterest income $25,975 $13,313 Noninterest income / Pre-provision net revenue 47.5% 45.4% 40 Note: Pre-provision net revenue calculated as net interest income + noninterest income – noninterest expense NON-INTEREST INCOME ND NONINTEREST INCOME DETAIL – FISCAL YEAR 2019 & 2 QUARTER 2020 YTD § Diversified sources of noninterest income contribute meaningfully to total revenue 45% § Largest noninterest income driver is service charges and fees of 2020YTD pre- § Additionally, wealth management and core processing / interchange income provision net revenue contribute significantly to total noninterest income FY2019 2020YTD NONINTEREST INCOME: ($000) % OF NII ($000) % of NII Service charges on deposit accounts $6,402 24.6% $2,451 18.4% Other service charges and fees $2,930 11.3% $1,196 9.0% Wealth and asset management fees $4,627 17.8% $2,667 20.0% Net realized gains on AFS securities $148 0.6% $2,190 16.5% Net realized gains on trading securities $16 0.1% $0 0.0% Net unrealized gains (losses) on trading securities $1,872 7.2% ($282) -2.1% Realized gains on Visa Class B Shares $463 1.8% $0 0.0% Mortgage banking $1,412 5.4% $1,001 7.5% Bank owned life insurance $1,317 5.1% $865 6.5% Card processing and interchange income $4,641 17.9% $2,453 18.4% Other noninterest income $2,147 8.3% $772 5.8% Total noninterest income $25,975 $13,313 Noninterest income / Pre-provision net revenue 47.5% 45.4% 40 Note: Pre-provision net revenue calculated as net interest income + noninterest income – noninterest expense

INVESTMENT PORTFOLIO JUNE 30, 2020 AVAILABLE FOR SALE SECURITIES PORTFOLIO FAIR VALUE Amortized Unrealized Fair $ in thousands Cost Gains Losses Value POOLED SBA CORPORATE 4% NOTES & BONDS 2% U.S. Government Sponsored Entities $139,125 $7,521 ($27) $146,619 State and Political Subdivisions 61,339 3,035 (183) 64,191 U.S GSE 27% Residential and Multi-Family Mortgages 293,605 11,804 (638) 304,771 RESI & Corporate Notes and Bonds 9,850 13 (691) 9,172 MULTIFAM STATE & POL. MORTGAGE SUBDIVISIONS 55% 12% Pooled SBA 22,397 961 0 23,358 Other 1,020 0 (37) 983 Total $527,336 $23,334 ($1,576) $549,094 41INVESTMENT PORTFOLIO JUNE 30, 2020 AVAILABLE FOR SALE SECURITIES PORTFOLIO FAIR VALUE Amortized Unrealized Fair $ in thousands Cost Gains Losses Value POOLED SBA CORPORATE 4% NOTES & BONDS 2% U.S. Government Sponsored Entities $139,125 $7,521 ($27) $146,619 State and Political Subdivisions 61,339 3,035 (183) 64,191 U.S GSE 27% Residential and Multi-Family Mortgages 293,605 11,804 (638) 304,771 RESI & Corporate Notes and Bonds 9,850 13 (691) 9,172 MULTIFAM STATE & POL. MORTGAGE SUBDIVISIONS 55% 12% Pooled SBA 22,397 961 0 23,358 Other 1,020 0 (37) 983 Total $527,336 $23,334 ($1,576) $549,094 41

LIQUIDITY § The Company manages liquidity to meet short-term financial obligations including the payment of deposits on demand or at maturity, the repayment of borrowings at maturity and the ability to fund commitments and other new business opportunities § Funding is obtained through a variety of sources (as of June 30, 2020): $ in millions Availability Excess Cash $391 FHLB $525 Unpledged Securities $98 Unsecured Lines of Credit $66 Brokered Deposit Capacity $668 Total $1,748 42LIQUIDITY § The Company manages liquidity to meet short-term financial obligations including the payment of deposits on demand or at maturity, the repayment of borrowings at maturity and the ability to fund commitments and other new business opportunities § Funding is obtained through a variety of sources (as of June 30, 2020): $ in millions Availability Excess Cash $391 FHLB $525 Unpledged Securities $98 Unsecured Lines of Credit $66 Brokered Deposit Capacity $668 Total $1,748 42

INTEREST RATE SENSITIVITY § Base case assumes composition of interest sensitive assets and liabilities remain static as of 6/30/2020 § Assumes rate shocks are instantaneous and sustained parallel rate shifts, or reflected uniformly across the yield curve regardless of duration to maturity or repricing of specific assets & liabilities § Interest rate risk is mitigated through efficient balance sheet management RATE SHOCK ANALYSIS – JUNE 30, 2020 INTEREST RATE SENSITIVITY Change in Interest Rates % Change in Net (Rate Shock) Interest Income Up 400 bps -2.5% Up 300 bps -3.2% Up 200 bps -2.9% Up 100 bps -3.6% Base -- Down 100 bps -1.7% Down 200 bps -3.3% 43INTEREST RATE SENSITIVITY § Base case assumes composition of interest sensitive assets and liabilities remain static as of 6/30/2020 § Assumes rate shocks are instantaneous and sustained parallel rate shifts, or reflected uniformly across the yield curve regardless of duration to maturity or repricing of specific assets & liabilities § Interest rate risk is mitigated through efficient balance sheet management RATE SHOCK ANALYSIS – JUNE 30, 2020 INTEREST RATE SENSITIVITY Change in Interest Rates % Change in Net (Rate Shock) Interest Income Up 400 bps -2.5% Up 300 bps -3.2% Up 200 bps -2.9% Up 100 bps -3.6% Base -- Down 100 bps -1.7% Down 200 bps -3.3% 43

APPENDIX MERGERS & ACQUISITIONSAPPENDIX MERGERS & ACQUISITIONS

OVERVIEW: ACQUISITION OF BANK OF AKRON KEY TRANSACTION METRICS TRANSACTION RATIONALE At Completion June 30, 2020 MRQ at Completion Target Financials Completion Date: July 17, 2020 Assets ($000): $471,221 Purchase Price ($M): $40.8 Loans ($000): 329,001 Deposits ($000): 425,696 Price / Tangible Book Value: 103.1% LTM ROAA: 0.81% Price / Earnings: 11.0x LTM ROAE: 4.31% NPAs / Assets: 0.66% Price / Assets: 10.0% § In market expansion for high growth BankOnBuffalo Core Deposit Premium: 0.4% division of CNB Consideration: 60% § Branches, footprints and target markets contiguous but PRO FORMA MAP not overlapping § Similar commercial banking focus to CNB § Provides critical personnel depth to rapidly growing Buffalo franchises § Provides critical personnel depth to rapidly growing Buffalo franchise § Filling market void created by consolidation of larger competitors in western New York 45OVERVIEW: ACQUISITION OF BANK OF AKRON KEY TRANSACTION METRICS TRANSACTION RATIONALE At Completion June 30, 2020 MRQ at Completion Target Financials Completion Date: July 17, 2020 Assets ($000): $471,221 Purchase Price ($M): $40.8 Loans ($000): 329,001 Deposits ($000): 425,696 Price / Tangible Book Value: 103.1% LTM ROAA: 0.81% Price / Earnings: 11.0x LTM ROAE: 4.31% NPAs / Assets: 0.66% Price / Assets: 10.0% § In market expansion for high growth BankOnBuffalo Core Deposit Premium: 0.4% division of CNB Consideration: 60% § Branches, footprints and target markets contiguous but PRO FORMA MAP not overlapping § Similar commercial banking focus to CNB § Provides critical personnel depth to rapidly growing Buffalo franchises § Provides critical personnel depth to rapidly growing Buffalo franchise § Filling market void created by consolidation of larger competitors in western New York 45

OVERVIEW: ACQUISITION OF LAKE NATIONAL BANK KEY TRANSACTION METRICS TRANSACTION RATIONALE At Completion June 30, 2016 MRQ at Completion Target Financials Completion Date: July 15, 2016 Assets ($000): $156,575 Purchase Price ($M): $24.8 Loans ($000): 122,367 Deposits ($000): 139,712 Price / Tangible Book Value: 172.3% LTM ROAA: 0.53% Price / Earnings: 30.5x LTM ROAE: 5.73% NPAs / Assets: 2.37% Price / Assets: 15.8% § Acquisition of healthy, well-performing institution in Core Deposit Premium: 9.9% greater Cleveland area Consideration: 100% Cash § Logical market expansion of ERIEBANK franchise PRO FORMA MAP § Demographically attractive with significant organic growth potential § Mentor market is known for its mid-sized C&I businesses, a core strength of the Company § Retention of key leadership with deep knowledge of the local market § Cash consideration leveraged regulatory capital without ownership dilution 46OVERVIEW: ACQUISITION OF LAKE NATIONAL BANK KEY TRANSACTION METRICS TRANSACTION RATIONALE At Completion June 30, 2016 MRQ at Completion Target Financials Completion Date: July 15, 2016 Assets ($000): $156,575 Purchase Price ($M): $24.8 Loans ($000): 122,367 Deposits ($000): 139,712 Price / Tangible Book Value: 172.3% LTM ROAA: 0.53% Price / Earnings: 30.5x LTM ROAE: 5.73% NPAs / Assets: 2.37% Price / Assets: 15.8% § Acquisition of healthy, well-performing institution in Core Deposit Premium: 9.9% greater Cleveland area Consideration: 100% Cash § Logical market expansion of ERIEBANK franchise PRO FORMA MAP § Demographically attractive with significant organic growth potential § Mentor market is known for its mid-sized C&I businesses, a core strength of the Company § Retention of key leadership with deep knowledge of the local market § Cash consideration leveraged regulatory capital without ownership dilution 46

OVERVIEW: ACQUISITION OF FC BANC CORP. KEY TRANSACTION METRICS TRANSACTION RATIONALE 9/30/2013 At Completion MRQ at Completion Target Financials Completion Date: October 11, 2013 Assets ($000): $364,163 Loans ($000): 250,885 Purchase Price ($M): $41.6 Deposits ($000): 326,963 Price / Tangible Book Value: 131.1% LTM ROAA: 0.98% LTM ROAE: 10.58% Price / Earnings: 11.8x NPAs / Assets: 0.42% Price / Assets: 11.3% § Opportunistic acquisition in similar markets in Northern Core Deposit Premium: 3.7% Ohio and the Columbus MSA Consideration: 80% Stock § Provided new avenues for growth without the pricing PRO FORMA MAP and deal structure more traditionally seen in metropolitan markets § Acquired commercial real estate and agricultural lending expertise to complement our strong C&I business lending background § Ability to replicate successful ERIEBANK model using a distinct brand with local bankers and oversight to serve particular markets § Retention of an experienced team that has deep understanding of the Central Ohio marketplace 47OVERVIEW: ACQUISITION OF FC BANC CORP. KEY TRANSACTION METRICS TRANSACTION RATIONALE 9/30/2013 At Completion MRQ at Completion Target Financials Completion Date: October 11, 2013 Assets ($000): $364,163 Loans ($000): 250,885 Purchase Price ($M): $41.6 Deposits ($000): 326,963 Price / Tangible Book Value: 131.1% LTM ROAA: 0.98% LTM ROAE: 10.58% Price / Earnings: 11.8x NPAs / Assets: 0.42% Price / Assets: 11.3% § Opportunistic acquisition in similar markets in Northern Core Deposit Premium: 3.7% Ohio and the Columbus MSA Consideration: 80% Stock § Provided new avenues for growth without the pricing PRO FORMA MAP and deal structure more traditionally seen in metropolitan markets § Acquired commercial real estate and agricultural lending expertise to complement our strong C&I business lending background § Ability to replicate successful ERIEBANK model using a distinct brand with local bankers and oversight to serve particular markets § Retention of an experienced team that has deep understanding of the Central Ohio marketplace 47

APPENDIX COVID-19 RESPONSEAPPENDIX COVID-19 RESPONSE

COVID-19 RESPONSE OPERATIONAL RESPONSE § Invoked Board-approved Pandemic Preparedness Plan including expanding remote-access availability for the workforce § Implemented communications plan to ensure employees, customers and critical vendors are kept abreast of developments affecting operations § Restricted all non-essential travel and instituted a mandatory quarantine period for anyone who has traveled to an impacted area § Temporarily closed all branch lobbies to non-employees, except for limited cases by appointment. The Company has since re-opened its branch lobbies, while continuing to enforce safe practices while serving customers § Continues to serve customers through drive-through capabilities, internet banking, ATM network, mobile application and customer service capabilities . § Working closely with customers directly affected by COVID-19 Prepared to continue short-term assistance in accordance with regulator guidelines 49COVID-19 RESPONSE OPERATIONAL RESPONSE § Invoked Board-approved Pandemic Preparedness Plan including expanding remote-access availability for the workforce § Implemented communications plan to ensure employees, customers and critical vendors are kept abreast of developments affecting operations § Restricted all non-essential travel and instituted a mandatory quarantine period for anyone who has traveled to an impacted area § Temporarily closed all branch lobbies to non-employees, except for limited cases by appointment. The Company has since re-opened its branch lobbies, while continuing to enforce safe practices while serving customers § Continues to serve customers through drive-through capabilities, internet banking, ATM network, mobile application and customer service capabilities . § Working closely with customers directly affected by COVID-19 Prepared to continue short-term assistance in accordance with regulator guidelines 49

ADDITIONAL DETAIL – COVID 19 RESPONSE CUSTOMER EXPERIENCE § Established COVID-19 Preparedness Committee comprised of Senior Management, focused on safety of our customers and employees § Re-established loan pricing floors at adjustable levels as part of standard pricing decisions § Implemented proactive communication protocols via CNB website, emails, social media and newspaper/radio ads § Implemented temporary branch closures, while maintaining limited lobby hours (by appointment only) and regular drive-through hours § Significantly participated in the PPP to support small businesses in our communities proactively § Granted needs-based loan payment deferrals due to COVID-19 impact, with no negative credit reporting § Proactively reached out to the Hospitality industry to establish principal and interest deferrals for six months 50ADDITIONAL DETAIL – COVID 19 RESPONSE CUSTOMER EXPERIENCE § Established COVID-19 Preparedness Committee comprised of Senior Management, focused on safety of our customers and employees § Re-established loan pricing floors at adjustable levels as part of standard pricing decisions § Implemented proactive communication protocols via CNB website, emails, social media and newspaper/radio ads § Implemented temporary branch closures, while maintaining limited lobby hours (by appointment only) and regular drive-through hours § Significantly participated in the PPP to support small businesses in our communities proactively § Granted needs-based loan payment deferrals due to COVID-19 impact, with no negative credit reporting § Proactively reached out to the Hospitality industry to establish principal and interest deferrals for six months 50

ADDITIONAL DETAIL – COVID 19 RESPONSE EMPLOYEE EXPERIENCE § Employed a split team approach § Leveraged IT network capabilities to support work from home § All commercial and private banking sales teams worked remotely § Diversified customer service center agents into 3 locations, in 3 states § Implemented a more robust employee communication process (multiple communications per week) § Initiated a temporary hiring freeze § Maintained employee wages at pre-pandemic rates (even with reduced hours) § All benefits, including 401k company match, were maintained 51ADDITIONAL DETAIL – COVID 19 RESPONSE EMPLOYEE EXPERIENCE § Employed a split team approach § Leveraged IT network capabilities to support work from home § All commercial and private banking sales teams worked remotely § Diversified customer service center agents into 3 locations, in 3 states § Implemented a more robust employee communication process (multiple communications per week) § Initiated a temporary hiring freeze § Maintained employee wages at pre-pandemic rates (even with reduced hours) § All benefits, including 401k company match, were maintained 51

SBA PPP LOANS SBA PAYCHECK PROTECTION PROGRAM (PPP) BY INDUSTRY (AS OF JUNE 30, 2020) ($ in thousands) Total Loans Average Loan # of Loans Manufacturing $49,737 $208 239 Healthcare 32,265 173 187 Construction 2 8,974 143 202 Professional and Business Services 23,606 110 215 Retail 15,487 88 175 Other Services 12,254 64 190 Accomodation and Food Services 11,853 65 182 Administrative and Waste Management 9 ,584 114 84 Transportation and Warehousing 8,587 124 69 Wholesale 7 ,444 146 51 Finance and Insurance 4 ,807 71 68 Mining, Quarrying and Oil and Gas Extraction 4,748 125 38 Information 4,418 245 18 Arts and Entertainment 3 ,451 72 48 Commercial Real Estate 3 ,536 51 69 Agricultural 2 ,088 60 35 Other 2 ,954 106 28 Total $225,793 $119 1 ,898 Loan Origination Pool Total Funded Expected Fees # of Loans < $350,000 $117,104 $5,855 1,746 $350,000 - $2,000,000 94,758 2,843 147 > $2,000,000 13,931 139 5 Total $225,793 $8,837 1,898 52 Note: Data as of June 30, 2020SBA PPP LOANS SBA PAYCHECK PROTECTION PROGRAM (PPP) BY INDUSTRY (AS OF JUNE 30, 2020) ($ in thousands) Total Loans Average Loan # of Loans Manufacturing $49,737 $208 239 Healthcare 32,265 173 187 Construction 2 8,974 143 202 Professional and Business Services 23,606 110 215 Retail 15,487 88 175 Other Services 12,254 64 190 Accomodation and Food Services 11,853 65 182 Administrative and Waste Management 9 ,584 114 84 Transportation and Warehousing 8,587 124 69 Wholesale 7 ,444 146 51 Finance and Insurance 4 ,807 71 68 Mining, Quarrying and Oil and Gas Extraction 4,748 125 38 Information 4,418 245 18 Arts and Entertainment 3 ,451 72 48 Commercial Real Estate 3 ,536 51 69 Agricultural 2 ,088 60 35 Other 2 ,954 106 28 Total $225,793 $119 1 ,898 Loan Origination Pool Total Funded Expected Fees # of Loans < $350,000 $117,104 $5,855 1,746 $350,000 - $2,000,000 94,758 2,843 147 > $2,000,000 13,931 139 5 Total $225,793 $8,837 1,898 52 Note: Data as of June 30, 2020

ECONOMICALLY SENSITIVE INDUSTRIES TOTAL GROSS LOANS AS OF 6/30/2020 COMMENTARY HOSPITALITY § The Company identifies its most economically sensitive 6% loan exposure categories as hospitality, energy, ENERGY 1% restaurants, and healthcare RESTAURANTS § The Company is not significantly dependent on these 1% economically sensitive industries HEALTHCARE 6% § In its underwriting criteria for these companies, the Company prioritizes: OTHER 86% § Projects, properties, or operators that are in- market § Experienced and proven owner-operators § Debt service coverage of 1.25 or better and LTV of 80% or better ADDITIONAL DETAIL AS OF 6/30/2020 Outstanding Average Past Non- $ in Thousands Balance Loan Size Due Performing (1) Most Economically Sensitive Industries $411,746 $400 0.3% $12,603 All Other Loans $2,623,042 $96 0.5% $16,666 Total Gross Loans $3,034,788 $134 0.5% $29,269 53ECONOMICALLY SENSITIVE INDUSTRIES TOTAL GROSS LOANS AS OF 6/30/2020 COMMENTARY HOSPITALITY § The Company identifies its most economically sensitive 6% loan exposure categories as hospitality, energy, ENERGY 1% restaurants, and healthcare RESTAURANTS § The Company is not significantly dependent on these 1% economically sensitive industries HEALTHCARE 6% § In its underwriting criteria for these companies, the Company prioritizes: OTHER 86% § Projects, properties, or operators that are in- market § Experienced and proven owner-operators § Debt service coverage of 1.25 or better and LTV of 80% or better ADDITIONAL DETAIL AS OF 6/30/2020 Outstanding Average Past Non- $ in Thousands Balance Loan Size Due Performing (1) Most Economically Sensitive Industries $411,746 $400 0.3% $12,603 All Other Loans $2,623,042 $96 0.5% $16,666 Total Gross Loans $3,034,788 $134 0.5% $29,269 53

HEALTHCARE LOAN PORTFOLIO HEALTHCARE LOANS BY CATEGORY (6/30/20) HEALTHCARE LOAN PORTFOLIO § Total healthcare portfolio comprises approximately 6% of total loan portfolio as of 6/30/20 OFFICES OF HOSPITALS HEALTHCARE 24% § Well diversified portfolio PROFESSIONALS 25% § Full recourse from owners/partners at origination $170M § Hard cash/land in the project or purchase PERSONAL CARE SOCIAL § Delinquency and non-performing loans include one HOMES SERVICES 26% 25% $9.7 million loan relationship with adequate collateral support ADDITIONAL DETAIL AS OF 6/30/2020 # of Outstanding Average Past Non- $ in Thousands Loans Balance Loan Size Due Performing Social Services 86 $42,152 $490 0.5% $211 Offices of Healthcare Professionals 316 43,322 137 0.0% 0 Hospitals 9 40,819 4,535 0.0% 0 Nursing and Residential Care Facilities 45 43,669 970 0.0% 9,747 Total Healthcare Loans 456 $169,962 $373 0.1% $9,958 54HEALTHCARE LOAN PORTFOLIO HEALTHCARE LOANS BY CATEGORY (6/30/20) HEALTHCARE LOAN PORTFOLIO § Total healthcare portfolio comprises approximately 6% of total loan portfolio as of 6/30/20 OFFICES OF HOSPITALS HEALTHCARE 24% § Well diversified portfolio PROFESSIONALS 25% § Full recourse from owners/partners at origination $170M § Hard cash/land in the project or purchase PERSONAL CARE SOCIAL § Delinquency and non-performing loans include one HOMES SERVICES 26% 25% $9.7 million loan relationship with adequate collateral support ADDITIONAL DETAIL AS OF 6/30/2020 # of Outstanding Average Past Non- $ in Thousands Loans Balance Loan Size Due Performing Social Services 86 $42,152 $490 0.5% $211 Offices of Healthcare Professionals 316 43,322 137 0.0% 0 Hospitals 9 40,819 4,535 0.0% 0 Nursing and Residential Care Facilities 45 43,669 970 0.0% 9,747 Total Healthcare Loans 456 $169,962 $373 0.1% $9,958 54

APPENDIX OTHER RELEVANT INFORMATIONAPPENDIX OTHER RELEVANT INFORMATION

KROLL RATINGS SUMMARY KROLL BOND RATING AGENCY - RATINGS SUMMARY Ratings last affirmed July 2020 CNB FINANCIAL CORP Senior Unsecured Debt BBB Subordinated Debt BBB- Short-Term Debt K3 CNB BANK Senior Unsecured Debt BBB+ Subordinated Debt BBB Short-Term Deposit K2 Short-Term Debt K2 OUTLOOK Stable 56 Source: Press Release – “KBRA Affirms Ratings for CNB Financial Corporation” (July 22, 2020) KROLL RATINGS SUMMARY KROLL BOND RATING AGENCY - RATINGS SUMMARY Ratings last affirmed July 2020 CNB FINANCIAL CORP Senior Unsecured Debt BBB Subordinated Debt BBB- Short-Term Debt K3 CNB BANK Senior Unsecured Debt BBB+ Subordinated Debt BBB Short-Term Deposit K2 Short-Term Debt K2 OUTLOOK Stable 56 Source: Press Release – “KBRA Affirms Ratings for CNB Financial Corporation” (July 22, 2020)

NON-GAAP RECONCILIATION Tangible common equity, tangible assets, and tangible book value per share are non-GAAP financial measures calculated using GAAP amounts. Tangible common equity is calculated by excluding the balance of goodwill and the core deposit intangible from the calculation of shareholders’ equity. Tangible assets are calculated by excluding the balance of goodwill and core deposit intangible from the calculation of total assets. Tangible book value per share is calculated by dividing tangible common equity by the number of shares outstanding. CNB believes that these non-GAAP financial measures provide information to investors that is useful in understanding its financial condition, because, in the case of the tangible common equity to tangible assets ratio, the ration is an additional measure used to assess capital adequacy and, in the case of tangible book value per share, tangible book value per share is an additional measure used to assess CNB’s value. Because not all companies use the same calculations of tangible common equity and tangible assets, this presentation may not be comparable to other similarly titled measures calculated by other companies. A reconciliation of these non-GAAP financial measures is provided below (dollars in thousands, except per share data). As of or for the year ending December 31, As of or for quarter, Dollars in thousands, except per share data 2016 2017 2018 2019 6/30/2020 Total common stockholder's equity (GAAP) $211,784 $243,910 $262,830 $304,966 $330,272 Less goodwill and other intangible assets $41,584 $40,355 $39,457 $38,890 $38,738 Tangible common equity (non-GAAP) $170,200 $203,555 $223,373 $266,076 $291,534 Shares outstanding 14,467,815 1 5,264,740 15,207,281 1 5,247,985 15,396,561 Book value per common share $14.64 $15.98 $17.28 $20.00 $21.45 Tangible book value per common share (Non-GAAP) $11.76 $13.33 $14.69 $17.45 $18.94 Total assets (GAAP) $2,573,821 $2,768,773 $3,221,521 $3,763,659 $4,469,551 Less goodwill and other intangible assets $41,584 $40,355 $39,457 $38,890 $38,738 Tangible common assets (Non-GAAP) $2,532,237 $2,728,418 $3,182,064 $3,724,769 $4,430,813 Tangible common equity to tangible assets (GAAP) 6.72% 7.46% 7.02% 7.14% 6.58% 57NON-GAAP RECONCILIATION Tangible common equity, tangible assets, and tangible book value per share are non-GAAP financial measures calculated using GAAP amounts. Tangible common equity is calculated by excluding the balance of goodwill and the core deposit intangible from the calculation of shareholders’ equity. Tangible assets are calculated by excluding the balance of goodwill and core deposit intangible from the calculation of total assets. Tangible book value per share is calculated by dividing tangible common equity by the number of shares outstanding. CNB believes that these non-GAAP financial measures provide information to investors that is useful in understanding its financial condition, because, in the case of the tangible common equity to tangible assets ratio, the ration is an additional measure used to assess capital adequacy and, in the case of tangible book value per share, tangible book value per share is an additional measure used to assess CNB’s value. Because not all companies use the same calculations of tangible common equity and tangible assets, this presentation may not be comparable to other similarly titled measures calculated by other companies. A reconciliation of these non-GAAP financial measures is provided below (dollars in thousands, except per share data). As of or for the year ending December 31, As of or for quarter, Dollars in thousands, except per share data 2016 2017 2018 2019 6/30/2020 Total common stockholder's equity (GAAP) $211,784 $243,910 $262,830 $304,966 $330,272 Less goodwill and other intangible assets $41,584 $40,355 $39,457 $38,890 $38,738 Tangible common equity (non-GAAP) $170,200 $203,555 $223,373 $266,076 $291,534 Shares outstanding 14,467,815 1 5,264,740 15,207,281 1 5,247,985 15,396,561 Book value per common share $14.64 $15.98 $17.28 $20.00 $21.45 Tangible book value per common share (Non-GAAP) $11.76 $13.33 $14.69 $17.45 $18.94 Total assets (GAAP) $2,573,821 $2,768,773 $3,221,521 $3,763,659 $4,469,551 Less goodwill and other intangible assets $41,584 $40,355 $39,457 $38,890 $38,738 Tangible common assets (Non-GAAP) $2,532,237 $2,728,418 $3,182,064 $3,724,769 $4,430,813 Tangible common equity to tangible assets (GAAP) 6.72% 7.46% 7.02% 7.14% 6.58% 57

NON-GAAP RECONCILIATION As of or for the year ending December 31, Year-to-Date Dollars in thousands, except per share data 2016 2017 2018 2019 6/30/2020 Average Common Equity $212,058 $239,223 $250,496 $285,324 $317,587 LESS: Average Intangibles 34,072 4 0,941 39,877 39,145 38,820 Average Tangible common equity (non-GAAP) $177,986 $198,282 $210,619 $246,179 $278,767 A Net Income Available to Common 2 0,411 2 3,725 33,569 39,934 17,059 B ADD: Tax-Affected Amortization of Intangibles 731 799 709 448 120 C Net Income + Tax-Affected Amortization of Intangibles $21,142 $24,524 $34,278 $40,382 $17,179 D (B + C) Return on Average Tangible Common Equity 11.88% 12.37% 16.27% 16.40% 12.33% (D / A) 58NON-GAAP RECONCILIATION As of or for the year ending December 31, Year-to-Date Dollars in thousands, except per share data 2016 2017 2018 2019 6/30/2020 Average Common Equity $212,058 $239,223 $250,496 $285,324 $317,587 LESS: Average Intangibles 34,072 4 0,941 39,877 39,145 38,820 Average Tangible common equity (non-GAAP) $177,986 $198,282 $210,619 $246,179 $278,767 A Net Income Available to Common 2 0,411 2 3,725 33,569 39,934 17,059 B ADD: Tax-Affected Amortization of Intangibles 731 799 709 448 120 C Net Income + Tax-Affected Amortization of Intangibles $21,142 $24,524 $34,278 $40,382 $17,179 D (B + C) Return on Average Tangible Common Equity 11.88% 12.37% 16.27% 16.40% 12.33% (D / A) 58