#11NFirst of Long Island Corporation Going Further KBW Investor Presentation August 2, 2022 Christopher Becker President & CEO Jay McConie EVP, CFO & Treasurer William Aprigliano FSVP, CAO#21NFirst of Long Island Corporation Safe Harbor Statement This presentation contains forward-looking statements that are based on The First of Long Island Corporation's ("FLIC") assumptions and beliefs. Such statements pertain to the outlook for FLIC's business, plans and objectives and market trends and other matters. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those discussed in such statements and no assurance can be given that the results in any forward-looking statement will be achieved. For these statements, FLIC claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. Any forward-looking statement speaks only as of the date on which it is made, and we disclaim any obligation to subsequently revise any forward-looking statement to reflect events or circumstances after such date or to reflect the occurrence of anticipated or unanticipated events. Certain factors could cause FLIC's future results to differ materially from those expressed or implied in any forward-looking statements contained in this presentation. These factors include the factors discussed in Part I, Item 1A of FLIC's Annual Report on Form 10-K for the year ended December 31, 2021 under the heading "Risk Factors" and any other cautionary statements, written or oral, which may be made or referred to in connection with any such forward-looking statements. Since it is not possible to foresee all such factors, these factors should not be considered as complete or exhaustive. First of Long Island Corporation | KBW Investor Presentation 2#31NFirst of Long Island Corporation Board of Directors Christopher Becker Director, President & Chief Executive Officer Paul T. Canarick Director Louisa M. Ives Director Alexander L. Cover Director John J. Desmond Director & Chair of the Audit Committee Stephen V. Murphy Director & Chair of the Asset Liability Committee Peter Quick Director & Chair of the Loan Committee Denise Strain Director & Chair of the Risk Committee Milbrey Rennie Taylor Director & Chair of the Governance and Nominating Committee Walter C. Teagle III Chairman of the Board Eric J. Tveter Director & Chair of the Compensation Committee First of Long Island Corporation | KBW Investor Presentation 3#41NFirst of Long Island Corporation Executives Christopher Becker President & Chief Executive Officer Tanweer S. Ansari, Esq Internal Counsel & Chief Compliance Officer Christopher Hilton Chief Lending Officer Donald L. Manfredonia Senior Business Development Officer Jay P. McConie, CPA Chief Financial Officer Richard P. Perro Chief Retail Officer Susanne Pheffer Chief Information Officer Michael J. Spolarich Chief Credit Officer Janet T. Verneuille, CPA Chief Risk Officer First of Long Island Corporation | KBW Investor Presentation 4#51NFirst of Long Island Corporation Celebrating 95 Years in Banking YEARS วาม N SINCE 1927 Long Island's Longest Standing Independent Bank First of Long Island Corporation | KBW Investor Presentation 5#61NFirst of Long Island Corporation No IN Nations First of Long Island Corporation | KBW Investor Presentation Arst National YEARS IN P'sCelebrate whook to Ce onay cele nt National Har Stolacion Celebrating 95 Years: Client Appreciation Days itation 1N First Nation N Bank LI Go First. Go Far. Celebrate vestments The year-long Celebration will recognize each Branch on the anniversary of its opening date. 100 1Ν First National Bank LI Gor Trat 6#71NFirst of Long Island Corporation To Merrick 1N First National Bank LI Go First. Go Far. in Let Connect. Visit us at tablicom First of Long Island Corporation | KBW Investor Presentation ACE SIGMEN LUSTGARTER Celebrating 95 Years: Investing in Our Communities CommunityFirst A newly established "CommunityFirst" program expands institutional support to the volunteer work our local branches are doing in service of their communities. AN First National Bank LI Go First. Go Far BUSTGARTS LUSTGART First National INE Bank Lt Go First. Go Far. iet Bag IN uty Tools Nail Co 7#81NFirst of Long Island Corporation Recent Deals Real Estate $19,600,000 Acquisition Financing SUFFOLK COUNTY Let's Connect. Richard O'Rourke Senior Vice President, Team Leader, Commercial Real Estate (516) 671-4900 x 7356 [email protected] www.fnbli.com All loans are subject to credit approval. First of Long Island Corporation | KBW Investor Presentation GoFirst to unlock competitiv IN Cybersecurity Account Monitoring: mochang. Dy dong so, yog sasutus acting th dla&sudny aracions, chaches a yout credite, and mon Follows Us @1NBankLI The newly expanded social media strategy enhances brand exposure and provides targeted, continuous communication with our followers. HEWLETT 1 GREAT NECK LOCUST VALLEY SINCE 1927 YEARS 1N 8#91NFirst of Long Island Corporation 41 Branches as of June 30, 2022 First of Long Island Corporation | KBW Investor Presentation First Southampton Branch Optimization ATM First National East Hampton#101NFirst of Long Island Corporation First of Long Island Corporation | KBW Investor Presentation First National Melville Office Expansion Relocated during 2Q 2022 ⚫40,000 Square-Foot Space • State-of-the-art Branch Opening 9-6-2022 Collaborative Work Environment • Space for Flexible Work Arrangements Class A Amenities 10 10#111NFirst of Long Island Corporation $2.00 Earnings Per Share ($) $1.60 $1.20 $0.80 $0.40 $1.01 $1.00 $1.81 $0.75 $1.06 $0.50 $.42 $0.25 Steady Growth Dividends Per Share ($) $0.00 $0.00 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 YTD 2012 2013 2014 2015 2016 2017 2018 2019 First of Long Island Corporation | KBW Investor Presentation $.78 $.40 2020 2021 2Q22 11#121NFirst of Long Island Corporation 1.50% Return on Assets 14.00% Consistent Performance Return on Equity 12.00% 1.18% 11.09% 1.20% 10.51% 10.61% 10.47% 10.34% 1.04% 1.00% 0.99% 1.00% 10.00% 0.95% 0.90% 0.60% 0.30% 8.00% 6.00% 4.00% 2.00% 12.43% 0.00% 0.00% 2017 2018 2019 2020 2021 Six Months 2017 2018 2019 2020 2021 Ended 6/30/2022 Six Months Ended 6/30/2022 First of Long Island Corporation | KBW Investor Presentation 12#131NFirst of Long Island Corporation Performance Measures ROA ROE Efficiency Ratio Nonaccrual Loans/Loans Net Chargeoffs/Average Loans Six Months Ended June 30, 2022 FLIC FLIC Versus Peers Peer Averages* Mid-Atlantic1 Nationwide² 1.18% 1.05% 1.11% 12.43% 11.19% 11.69% 49.38% 61.41% 62.19% 0.01% 0.59% 0.49% 0.01% 0.11% 0.06% *Comparison of FLIC performance metrics for the average of twelve-months ended March 31, 2022 1 Includes publicly-traded banks and thrifts headquartered in the Mid-Atlantic region with total assets between $1 billion and $5 billion 2 Includes publicly-traded banks and thrifts nationwide with total assets between $1 billion and $5 billion Source: SNL First of Long Island Corporation | KBW Investor Presentation 13#141NFirst of Long Island Corporation $400 $350 $300 $250 $200 $150 $100 $50 $0 60 1/1/12 12/31/12 12/31/13 12/31/14 Total Return Performance 12/31/15 The First of Long Island First of Long Island Corporation | KBW Investor Presentation 12/31/16 12/31/17 12/31/18 12/31/19 12/31/20 Peer Group* 12/31/21 3/31/22 $300 $250 Stock Performance FLIC Stock Price Performance 10.5 Year Returns $205.51 $200 $262.27 $150 $228.14 $50 $149.86 $100 $100 $100 CAGR 7.1% CAGR 3.9% $0 60 Dividends Reinvested Simple Price Appreciation 1/1/12 16/30/22 * Peer group includes ACNB Corporation, Arrow Financial Corporation, BCB Bancorp, Inc., Cambridge Bancorp, C&F Financial Corporation, Chemung Financial Corporation, CNB Financial Corporation, ConnectOne Bancorp, Inc., Enterprise Bancorp, Inc., Financial Institutions, Inc., Flushing Financial Corporation, HarborOne Bancorp, Inc., Kearny Financial Corp., Northfield Bancorp, Inc., Orrstown Financial Services, Inc., Peapack-Gladstone Financial Corporation, Primis Financial Corp., Republic First Bancorp, Inc., Tompkins Financial Corporation, TrustCo Bank Corp NY, Univest Financial Corporation, Washington Trust Bancorp, Inc. and Western New England Bancorp, Inc.. 14#151NFirst of Long Island Corporation 5.50% 5.00% 4.63% 4.50% 4.00% Net Interest Margin 4.04% 3.74% 3.64% 3.54% 3.49% 3.52% 3.55% 3.52% 3.57% 3.49% 3.50% 3.34% 3.18% 3.03% 2.94% 2.91% 2.93% 2.89% 2.74% 2.64% 2.64% 2.57% NIM Expansion From Lower Deposit Costs 3.00% 2.50% First of Long Island Corporation | KBW Investor Presentation 2.00% 1.42% 1.50% 1.02% 1.00% 0.83% 0.62% 0.63% 0.65% 0.58% 0.58% 0.50% 0.93% 0.49% 0.36% 0.00% 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 YTD Loan Yields -Deposit Costs Net Interest Margin 15#16$4,000 $3,000 $2,000 1NFirst of Long Island Corporation $1,147 $1,000 Total Loans ($M) Total Commercial Loans ($M) 12.3% CAGR* $3,105 $3,336 $3,000 $2,000 $1,000 $559 14.4% CAGR* $3,000 $2,061 $1,858 $2,000 Steady Growth Total Residential Loans ($M) 9.8% CAGR* $1,000 $584 $1,247 $1,274 $0 $0 $0 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 * 10.5 Year CAGR First of Long Island Corporation | KBW Investor Presentation 16#171N First of Long Island Corporation 23% 2Q 2022 $3.3B YE 2021 $3.1B 7% 3% 29% 38% 23% ■Residential Multifamily 3% 5% 28% 17% 40% Other CRE Owner Occ C & I SBA PPP 4% YE 2020 $3.0B 3% 5% 26% * Excludes $1 million in other loans for the 2Q 2022 and 2021 periods and $2 million for the 2020 period that fall outside the stated categories. First of Long Island Corporation | KBW Investor Presentation Loan Mix* 45% 17#181NFirst of Long Island Corporation Credit Quality Non-Performing Loans Ratio Net Charge-off Ratio Reserve Coverage Ratio $1,235 $260 $633 0.04% $125 0.01% 12/31/2021 6/30/2022 0.02% 12/31/2021 0.01% 6/30/2022 Non-Performing Loans ($000s) NPL / Total Loans YTD Net Charge-offs ($000s) NCO / Average Loans First of Long Island Corporation | KBW Investor Presentation $30.9 $29.8 0.96% 0.93% 12/31/2021 6/30/2022 ACL ($M) ACL/Total Loans 18#191NFirst of Long Island Corporation $4,000 $3,000 $2,000 $1,633 $1,000 60 $0 Total Deposits ($M) 8.7 CAGR* $3,315 $3,605 $3,000 $2,000 $1,000 Total Noninterest-Bearing Checking Deposits ($M) 12.3% CAGR* $529 $1,401 $1,470 الاس $3,000 $2,000 $1,000 $249 Steady Growth Total Borrowings ($M) -0.6% CAGR* $311 $289 $0 $0 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2Q22 * 10.5 Year CAGR First of Long Island Corporation | KBW Investor Presentation 19#201N First of Long Island Corporation 11% Deposit Mix 2Q 2022 $3.3B YE 2021 $3.3B YE 2020 $3.3B 12% 4% 32% First of Long Island Corporation | KBW Investor Presentation 7% 41% 5% 12% 34% 13% 42% Checking Money Market Time NOW Savings 11% 4% 35% 37% 20 20#211NFirst of Long Island Corporation 7% 4% 6% 2Q 2022 $3.9B 11% 4% 38% 30% 9% Funding Costs: 0.54% Effective Federal Funds Rate: 1.58% Money Market First of Long Island Corporation | KBW Investor Presentation 6% Funding Mix YE 2021 $3.6B YE 2020 $3.6B 4% 11% 39% 9% 32% 4% Funding Costs: 0.68% Effective Federal Funds Rate: 0.08% 8% 10% 4% 33% 32% Funding Costs: 1.12% Effective Federal Funds Rate: 0.09% Noninterest-bearing Time Brokered CDs Borrowings NOW Savings 21 21#221NFirst of Long Island Corporation Key Strategic Initiatives • Supporting the growth of our balance sheet with a profitable relationship banking business Improving the quality of technology through continuing digital enhancements Optimizing our branch network across a larger geography Using new branding and a "CommunityFirst" • focus to improve name recognition • • Enhancing our website and social media presence including the promotion of First Investments Recruiting additional seasoned banking professionals to support growth initiatives Focusing on strong cybersecurity and environmental, social and governance practices First of Long Island Corporation | KBW Investor Presentation 22 222#231NFirst of Long Island Corporation QA 23