Exhibit 99.2

1 Columbia Financial, Inc. to Convert to Fully Public Company and Partner with Northfield Bancorp, Inc. Unlocking Shareholder Value in Conjunction With Our Second Step Conversion & Stock Offering February 2, 2026

2 Disclaimer and Caution About Forward - Looking Statements Certain statements in this communication constitute “forward - looking statements” within the meaning of the Private Securities Li tigation Reform Act of 1995, as amended, which statements involve inherent risks and uncertainties. Examples of forward - looking statements include, but are not limited to, statements regarding t he outlook and expectations of Columbia Financial, Inc. (“Columbia” or “CLBK”) and Northfield Bancorp, Inc. (“Northfield” or “NFBK”), respectively, with respect to the proposed transaction, the st rat egic benefits and financial benefits of the proposed transaction, including the expected impact of the proposed transaction on the combined company’s future financial performance (including anticipated ac cretion to earnings per share, the tangible book value earn - back period and other operating and return metrics), the timing of the closing of the proposed transaction, and the ability to suc ces sfully integrate the combined businesses. Such statements are often characterized by the use of qualified words (and their derivatives) such as “may,” “will,” “anticipate,” “could,” “should,” “ wou ld,” “believe,” “contemplate,” “expect,” “estimate,” “continue,” “plan,” “project” and “intend,” as well as words of similar meaning or other statements concerning opinions or judgment of Columbia or Northfie ld or their respective management about future events. Forward - looking statements are based on assumptions as of the time they are made and are subject to risks, uncertainties and other factors th at are difficult to predict with regard to timing, extent, likelihood and degree of occurrence, which could cause actual results to differ materially from anticipated results expressed or implied by such fo rwa rd - looking statements. Such risks, uncertainties and assumptions, include, among others, the following: ( i ) the occurrence of any event, change or other circumstances that could give rise to the right of one or both of the parties to terminate the merger agreement; (ii) the failure to obtain necessary regulatory approvals (and the risk that such approvals may result in the imposition of conditions th at could adversely affect the combined company or the expected benefits of the proposed transaction) and the possibility that the proposed transaction does not close when expected or at all because re qui red regulatory approvals, the approval by Columbia’s and/or Northfield’s stockholders, or other approvals and the other conditions to closing are not received or satisfied on a timely basis or at al l; (iii) the outcome of any legal proceedings that may be instituted against Columbia or Northfield; (iv) the possibility that the anticipated benefits of the proposed transaction, including anticipated co st savings and strategic gains, are not realized when expected or at all, including as a result of changes in, or problems arising from, general economic and market conditions, interest and exchange rat es, monetary policy, laws and regulations and their enforcement, and the degree of competition in the geographic and business areas in which Columbia and Northfield operate; (v) the possibility tha t the integration of the two companies may be more difficult, time - consuming or costly than expected; (vi) Columbia’s ability to successfully complete its second step conversion; (vii) the pos sib ility that the final appraisal of Columbia conducted by RP Financial, LC will differ from the preliminary appraisal conducted by RP Financial, LC; (viii) the impact of purchase accounting with respect to th e proposed transaction, or any change in the assumptions used regarding the assets acquired and liabilities assumed to determine their fair value and credit marks; (ix) the possibility that the pro pos ed transaction may be more expensive or take longer to complete than anticipated, including as a result of unexpected factors or events; (x) the diversion of management’s attention from ongoing bus iness operations and opportunities; (xi) potential adverse reactions of Columbia’s or Northfield’s customers or changes to business or employee relationships, including those resulting from the ann oun cement or completion of the proposed transaction; (xii) a material adverse change in the financial condition of Columbia or Northfield; (xiii) changes in Columbia’s or Northfield’s share price be fore closing; (xiv) risks relating to the potential dilutive effect of shares of Columbia’s common stock to be issued in the proposed transaction; (xv) general competitive, economic, political and market co ndi tions, impact of any potential government shutdowns; (xvi) major catastrophes such as earthquakes, floods or other natural or human disasters, including infectious disease outbreaks; and (xv ii) other factors that may affect future results of Columbia or Northfield, including, among others, changes in asset quality and credit risk; the imposition of tariffs and any retaliatory responses; t he inability to sustain revenue and earnings growth; changes in interest rates; deposit flows; inflation; customer borrowing, repayment, investment and deposit practices; the impact, extent and timing of t ech nological changes; capital management activities; and other actions of the Federal Reserve Board and legislative and regulatory actions and reforms. These factors are not necessarily all of the factors that could cause Columbia’s, Northfield’s or the combined company’s actu al results, performance or achievements to differ materially from those expressed in or implied by any of the forward - looking statements. Other factors, including unknown or unpredictable factors, als o could harm Columbia’s, Northfield’s or the combined company’s results. Although each of Columbia and Northfield believes that its expectations with respect to forward - looking statements are based upo n reasonable assumptions based on its existing knowledge of its business and operations, there can be no assurance that actual results of Columbia or Northfield will not differ materially f rom any projected future results expressed or implied by such forward - looking statements. Additional factors that could cause results to differ materially from those described above can be found in Colum bia ’s most recent annual report on Form 10 - K for the fiscal year ended December 31, 2024, quarterly reports on Form 10 - Q, and other documents subsequently filed by Columbia with the Securities Exchan ge Commission (the “SEC”), and in Northfield’s most recent annual report on Form 10 - K for the fiscal year ended December 31, 2024, and its other filings with the SEC and quarterly reports on Form 10 - Q, and other documents subsequently filed by Northfield with the SEC. The actual results anticipated may not be realized or, even if substantially realized, they may not have the ex pec ted consequences to or effects on Columbia, Northfield or each of their respective businesses or operations. Investors are cautioned not to rely too heavily on any such forward - looking statements. Col umbia and Northfield urge you to consider all of these risks, uncertainties and other factors carefully in evaluating all such forward - looking statements made by Columbia and Northfield. For ward - looking statements speak only as of the date they are made and Columbia and/or Northfield undertake no obligation to update or clarify these forward - looking statements, whether as a result of new information, future events or otherwise, except to the extent required by applicable law.

3 Important Additional Information About the Transaction and Where to Find It In connection with the proposed transaction, Columbia Financial, Inc., a newly formed Maryland corporation (the “Holding Comp any ”), intends to file with the SEC a Registration Statement on Form S - 4 (the “Registration Statement”) to register the shares of Holding Company common stock to be issued in connection with the pro pos ed transaction and that will include a joint proxy statement of Columbia and Northfield and a prospectus of the Holding Company (the “Joint Proxy Statement/Prospectus”), and a Registration Sta tement on Form S - 1 to register the shares of Holding Company common stock to be issued in connection with the second step conversion offering and each of Columbia, the Holding Company an d N orthfield may file with the SEC other relevant documents concerning the proposed transaction. A definitive Joint Proxy Statement/Prospectus will be sent to the stockholders of Columb ia and Northfield to seek their approval of the proposed transaction. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, INVESTORS AND STOCKHOLDERS OF COLUMBIA AND NORTHFIELD ARE URGED TO READ THE REG ISTRATION STATEMENT AND JOINT PROXY STATEMENT/PROSPECTUS REGARDING THE PROPOSED TRANSACTION WHEN THEY BECOME AVAILABLE AND ANY OTHER RE LEV ANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMAT ION ABOUT COLUMBIA, THE HOLDING COMPANY AND NORTHFIELD AND THE PROPOSED TRANSACTION AND RELATED MATTERS. This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or the solicita tio n of any vote or approval with respect to the proposed transaction between Columbia and Northfield. No offer of securities shall be made except by means of a prospectus meeting the re quirements of the Securities Act of 1933, as amended, and no offer to sell or solicitation of an offer to buy shall be made in any jurisdiction in which such offer, solicitation o r s ale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. A copy of the Registration Statement, Joint Proxy Statement/Prospectus, as well as other filings containing information about Co lumbia, the Holding Company and Northfield, may be obtained, free of charge, at the SEC’s website (http://www.sec.gov). You will also be able to obtain these documents, when they are filed, free of charge, from Columbia by accessing Columbia’s website at https://ir.columbiabankonline.com/financials/sec - filings/default.aspx or from Northfield by accessing Northfield’s website at ht tps://ir.enorthfield.com/financials/sec - filings/default.aspx. Copies of the Registration Statement on Form S - 4, the Joint Proxy Statement/Prospectus and the filings with the SEC that will be incorporated by reference therein can also be obtained, without charge, by directing a request to Columbia Investor Relations, 19 - 01 Route 208 North, Fair Lawn, New Jersey 07410, or by calling (833) 550 - 0717, or t o Northfield by directing a request to Northfield Investor Relations, 581 Main Street, Suite 810, Woodbridge, New Jersey 07095 or by calling (732) 499 - 7200 x2519. The information on Columbia’s or Northf ield’s respective websites is not, and shall not be deemed to be, a part of this communication or incorporated into other filings either company makes with the SEC. Participants in the Solicitation Columbia, Northfield and certain of their respective directors, executive officers and employees may be deemed to be particip ant s in the solicitation of proxies from the stockholders of Columbia and Northfield in connection with the proposed transaction. Information about the interests of the directors and executive offi cer s of Columbia and Northfield and other persons who may be deemed to be participants in the solicitation of stockholders of Columbia and Northfield in connection with the proposed transaction and a de scription of their direct and indirect interests, by security holdings or otherwise, will be included in the Joint Proxy Statement/Prospectus related to the proposed transaction, which will be filed wit h the SEC. Information about the directors and executive officers of Columbia and their ownership of Columbia common stock is also set f ort h in the definitive proxy statement for Columbia’s 2025 Annual Meeting of Shareholders, as filed with the SEC on Schedule 14A on April 25, 2025 (the “Columbia 2025 Proxy Statement”) and other docu men ts subsequently filed by Columbia with the SEC. Information about the directors and executive officers of Columbia, their ownership of Columbia common stock, and Columbia’s transactions with rel ated persons is set forth in the sections entitled “Stock Ownership,” “Proposal 1 – Election of Directors,” “Director Compensation,” “Compensation Discussion and Analysis” and “Executive Compensatio n,” of the Columbia 2025 Proxy Statement. To the extent holdings of Columbia’s common stock by the directors and executive officers of Columbia’s have changed from the amounts of Columbia’s com mon stock held by such persons as reflected therein, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Information about the directors and executive officers of Northfield and their ownership of Northfield common stock can also be found in Northfield’s definitive proxy statement in connection with its 2025 Annual Meeting of Stockholders, as filed with the SEC on April 14, 2025 (the “Northfield 2025 Proxy Statement”) and other doc ume nts subsequently filed by Northfield with the SEC. Information about the directors and executive officers of Northfield, their ownership of Northfield common stock, and Northfield’s transactions wi th related persons is set forth in the sections entitled “Voting Securities and Principal Holders Thereof,” “Corporate Governance and Board Matters,” “Executive Compensation” and “Proposal 1 – Election of Dir ectors” of the Northfield 2025 Proxy Statement. To the extent holdings of Northfield common stock by the directors and executive officers of Northfield have changed from the amounts of No rth field common stock held by such persons as reflected therein, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Free copies of thes e d ocuments may be obtained as described in the preceding paragraph.

4 Non - GAAP Financial Measures This presentation contains financial information presented in accordance with U.S. Generally Accepted Accounting Principles ( "GA AP"). This presentation also contains certain non - GAAP information that the Company's management uses in its analysis of the Company's financial results, including tangible stockholders' equit y t o tangible assets (“TCE / TA”) and other non - GAAP metrics. Specifically, the Company provides measures based on what it believes are its operating earnings on a consistent basis and excludes materia l n on - routine operating items which affect the GAAP reporting of results of operations. The Company's management believes that providing this information to analysts and investors allows them to bet ter understand and evaluate the Company's core financial results for the periods presented. Because non - GAAP financial measures are not standardized, it may not be possible to compare these financial m easures with other companies' non - GAAP financial measures having the same or similar names. The Company also provides measurements and ratios based on tangible stockholders' equity. T hes e measures are commonly utilized by regulators and market analysts to evaluate the Company's financial condition and, therefore, the Company's management believes that such informatio n i s useful to investors. A reconciliation of the non - GAAP financial measures used in this presentation to the most directly comparable GAAP measures is provided in the appendix to this presenta tio n. Pro Forma Forward - Looking Data Neither Columbia’s nor Northfield’s independent registered public accounting firms have studied, reviewed or performed any pr oce dures with respect to the pro forma forward - looking financial data for the purpose of inclusion in this presentation, and, accordingly, neither have expressed an opinion or provided any form of as sur ance with respect thereto for the purpose of this presentation. This pro forma forward - looking financial data is for illustrative purposes only and should not be relied on as necessarily being indicati ve of future results. The assumptions and estimates underlying the proforma forward - looking financial data are inherently uncertain and are subject to a wide variety of significant business, economic and competitive risks and uncertainties that could cause actual results to differ materially from those contained in the prospective financial information, including those in the “Disclaimer and Caution abou t F orward - Looking Statements” disclaimer on slide 2 of this presentation. Pro forma forward - looking financial data is inherently uncertain due to a number of factors outside of Columbia’s and Northfield’s c ontrol. Accordingly, there can be no assurance that the prospective results are indicative of future performance of the combined company after the proposed second step conversion and acquisition or tha t a ctual results will not differ materially from those presented in the pro forma forward - looking financial data. Inclusion of pro forma financial data in this presentation should not be regarded as a rep resentation by any person that the results contained in the prospective financial information will be achieved.

5 OVERVIEW OF THE SECOND STEP CONVERSION Overview of the Transaction Second Step Conversion and Partnership with Northfield Two - part transaction whereby Columbia conducts a second step offering and acquires Northfield with a combination of stock and cash Offering is expected to produce gross proceeds of ~$1.4bn - $1.9bn Stock sold in the subscription offering only to Columbia depositors Community offering and stand - by firm commitment underwritten offering led by Keefe, Bruye tte & Woods, A Stifel Company for any shares remaining after subscription offering Headquartered in Woodbridge, NJ and operates 37 retail branches in attractive markets across New Jersey, Staten Island and Brooklyn Experienced management team and board with compatible cultures and strong ties to markets served Conservative credit culture, lending and asset quality Stable low cost core deposit base • Combined transactions will meaningfully e nhance the scale of pro forma Columbia • Eliminates the “minority discount” in Columbia’s stock as an MHC • Strategically expands the franchise into new markets while adding density to existing markets • A merger with Northfield is financially attractive and significantly improves the operating performance, balance sheet and strategic positioning of the pro forma Company • Combines two well - respected management teams with proven track records in the markets they serve Pro Forma Scale at Close (1)(2) ~$18bn Assets ~$12bn Loans ~$13bn Deposits Acquisition Deal Value / Multiples (1)(2) $597mm Deal Value 0.86x P / TBV 10.6x P / ’27E EPS Transaction Impacts (1)(2) ~50% ’27E EPS Accretion 4.4% TBV Dilution 1.8 Yr. TBV Earnback (1) Data presented at the midpoint of the preliminary appraisal conducted by RP Financial. The final appraisal may differ fro m t he preliminary appraisal due to market conditions or other factors (2) A ssumes that 41,763,852 Northfield common shares outstanding and 103,407 Northfield PSUs are converted to Columbia common shar es at the fixed exchange ratio; Assumes 70% stock / 30% cash consideration The second step offering and the acquisition would close simultaneously OVERVIEW OF NORTHFIELD

6 • Pro forma board will consist of 9 Columbia directors and 4 Northfield directors • Thomas Kemly (Columbia) to serve as Chief Executive Officer of the holding company and bank • Dennis Gibney (Columbia) to serve as 1 st Senior Executive Vice President and Chief Banking Officer of the holding company and bank • Steven Klein (Northfield) to serve as Senior Executive Vice President, Chief Operating Officer of the holding company and ban k • Thomas Splaine (Columbia) will serve as Executive Vice President and Chief Financial Officer of the holding company and bank • Anticipated closing early Q3 2026 • Customary regulatory approvals • Columbia depositor and shareholder approvals and completion of the second step offering • Northfield shareholder approval Transaction Summary • Northfield shareholders may elect either stock or cash consideration for each share (with cash consideration to be paid for u p t o 30% of outstanding Northfield shares) – Presentation assumes 70% stock / 30% cash consideration structure • Merger consideration per Northfield share based on final appraisal for Columbia at closing as outlined below: – Appraisal value less than $2.3 billion: either (a) 1.425 shares of converted Columbia common stock or (b) $14.25 in cash; – Appraisal value equal to or greater than $2.3 billion and less than $2.6 billion: either (a) 1.450 shares of converted Columb ia common stock or (b) $14.50 in cash; – Appraisal value equal to or greater than $2.6 billion: either (a) 1.465 shares of converted Columbia common stock or (b) $14. 65 in cash • $597 - $613 million potential aggregate deal value range (1) Merger Structure Timing & Approvals Acquisition Multiples Board Composition & Management • Appraisal Value Range: (2) $1.9 billion - $2.6 billion • Gross Offering Size Range: $1.4 billion – $ 1.9 billion, expected to be funded concurrently at transaction close • Conversion Price: $10.00 per share • Post closing of the transactions, Columbia intends to pay a cash dividend Second Step Transaction (1) Assumes that 41,763,852 Northfield common shares outstanding and 103,407 Northfield PSUs are converted to Columbia common sh ares at a fixed exchange ratio and cash (2) Ranges presented per the preliminary independent appraisal conducted by RP Financial. The final appraisal may differ from the prelim ina ry appraisal due to market conditions or other factors $14.65 Offer Price ( Appraisal > $2.6 billion ) Price / TBV: 0.89x Price / 2027 EPS: 10.9x $14.50 Offer Price ( Appraisal between $2.3 and $2.6 billion ) Price / TBV: 0.88x Price / 2027 EPS: 10.7x $14.25 Offer Price ( Appraisal < $2.3 billion ) Price / TBV: 0.86x Price / 2027 EPS: 10.6x

7 Low Risk Transaction Strategic Rationale behind Second Step Conversion & Acquisition Strategic Market Positioning Strategic Rationale Source: S&P Global Market Intelligence; Note: Deposit market share data as of 6/30/2025; Data presented at the midpoint of th e p reliminary appraisal conducted by RP Financial. The final appraisal may differ from the preliminary appraisal due to market conditions or other factors (1) “Community Bank” defined as a bank with less than $25 billion in total assets as of 12/31/2025 • Complementary geographic footprint that strengthens share in attractive markets • Creates a top 5 community bank (1) headquartered in the NYC metro area with an expanded presence in vibrant Brooklyn and Staten Island markets • Adds approximately $1.8bn of deposits in New Jersey, making the combined company the third largest New Jersey - headquartered bank by market share • Additional scale and product offerings expected to create new lending and deposit opportunities across legacy Northfield mark ets • Creates a formidable competitor in the greater New Jersey / metro New York area • Eliminates Columbia’s “minority discount” embedded in the MHC structure • Acquiring Northfield simultaneously with a second step conversion leverages the net proceeds in a way that allows the Company to achieve a normalized return on equity level faster than on a standalone basis • Pro forma company will have capital ratios that far exceed regulatory buffers and a regulatory CRE ratio well below 300% • Conservative credit and fair value marks supported by thorough and detailed due diligence process with independent third part ies • Conservative credit cultures and low nonperforming assets and charge - off history • Attractively priced transaction relative to other recent M&A transactions • Columbia is an experienced acquiror and integrator with four successfully - executed M&A transactions since completing their minority stock transaction in 2018

8 Pro Forma Scale (1) Creating a Formidable NJ/NY Metro Competitor Enhanced Profitability 1.06% 2027E ROAA 48% 2027E Efficiency 2.90% 2027E Net Interest Margin Fortress Balance Sheet With Added Flexibility (1) ~96% Loans / Deposits 211% CRE / TRBC Ratio (2) 16.7% TCE Ratio ~1.2% ACL / Loans HFI 28% Cash & Securities / Assets (4) 71% Core Deposits / Deposits (3)(4) Note: Data presented at the midpoint of the preliminary appraisal conducted by RP Financial. The final appraisal may differ f rom the preliminary appraisal due to market conditions or other factors; Assumes 6/30/2026 transaction close (1) Pro forma balance sheet and ratios shown at close unless otherwise noted (2) Excludes ow ner - occupied CRE per regulatory definition (3) Core deposits defined as total deposits less total CD balances (4) Pro forma metrics shown at 12/31/2025 include impact of second step offe rin g and exclude purchase accounting adjustments ~$18bn Total Assets ~$12bn Gross Loans ~$13bn Total Deposits ~$3bn Tangible Common Equity 100+ Branches

9 39% 35% 8% 4% 15% 57% 30% 13% $1,784M $781M $322M $237M $124M $39M 54.3% 23.8% 9.8% 7.2% 3.8% 1.2% $17.9B $14.7B $13.5B $11.8B $10.9B $10.9B $7.2B $3.7B 11.1% 9.1% 8.4% 7.3% 6.8% 6.8% 4.4% 2.3% + …With a Strong, Complementary Branch Network ( 2 ) Pro Forma Franchise Overview Creating a Premier New Jersey and New York Franchise Adding Density in One of the Best Banking Markets… Deposit Market Share For Community Banks Headquartered in NYC MSA (1) Source: S&P Global Market Intelligence; Note: Deposit market share and geography data as of 6/30/2025; Data shown pro forma for pending or recently completed transactions (1) “Community Bank” defined as a bank with less than $25 billion in total assets as of 12/31/2025 (2) “Northern NJ” includes Bergen, Essex, Hudson, Morris, Passaic, Sussex and Warren counties; “Central NJ” includes Hunterdon, Mercer, Middlesex, Monmouth, Somerset and Union counties; “South NJ” includes Atlantic, Burlington, Camden, Cape M ay, Cumberland, Gloucester, Ocean and Salem counties; “Brooklyn & Other NYC” includes the Bronx, New York, and Queens; “Staten Island” includes Richmond County Provident Financial Services Apple Financial Holdings Inc. OceanFirst Financial Corp. Dime Community Bancshares Inc. ConnectOne Bancorp, Inc. CLBK ( 71 ) NFBK (37) Staten Island Manhattan Brooklyn Southern NJ New York City Central NJ Columbia Standalone Deposit Geography (2) Pro Forma Deposit Geography (2) Northern NJ Central NJ Southern NJ Brooklyn & Other NYC Southern NJ Staten Island Northern NJ Central NJ #1 #2 #3 #4 #5 #6 Deposit Market Share For Community Banks In Staten Island (1) Deposits ($M) Market Share (%) #1 #2 #3 #4 #5 #6 Rank Deposits ($ B ) Market Share (%) Rank Dime Community Bancshares Inc. ES Bancshares, Inc. Apple Financial Holdings Inc. BCB Bancorp, Inc. Kearny Financial Corp. Northern NJ #14

10 Trenton Company Snapshot of Prominent New Jersey and Metro New York Footprint • Long Operating History with Deep Roots : 135+ years in the market, evolving from a savings and loan association into a robust publicly - traded bank holding company • Strong Core Markets : Top three counties by deposits (77% of Northfield deposit base) have a 20%+ greater median household income compared to the national median (1) • Seasoned Executives : Management and Board lead by Chairman, President and CEO Steven Klein. Management team has an average tenure of 14 years and 165+ years of cumulative banking/securities industry experience • Strong Footprint in Attractive Markets: Deep rooted client network and longstanding relationships across Northfield’s 32 branches located in the New York City MSA and 5 branches in the Trenton - Princeton MSA • Attractive Low - Cost Funding Base: ~85bps below peer median cost of interest - bearing deposits driven by a granular deposit mix and high - value relationships (2) NFBK (37) 2025 Q4 Financial Overview $5.8bn Total Assets $4.0bn Total Deposits $3.8bn Net Loans 0.95% Non - GAAP ROAA (3) 7.5% Non - GAAP ROAE (3) 50.9% Non - GAAP Efficiency Ratio (3) 4.77% Yield on Loans 2.23% Cost of Int. Bearing Deposits 2.70% Net Interest Margin 12.0% TCE / TA (3) 0.28% NPAs / Assets 236% ACL / NPLs (4) Company Overview Source: S&P Global Market Intelligence; Financial data as of or for the quarter ended 12/31/2025 (1) U.S. market demographic dat a as of 6/30/2025; Deposit figures per bank level regulatory filings as of 6/30/2025; Top 3 counties of operation include Richmond County, NY, Union County, NJ and Middlesex County, NJ (2) Peers inclu de major exchange traded banks and thrifts headquartered in NJ, CT or the NYC MSA with total assets between $2.0 billion and $10.0 billion and core ROAA less than 2.00%; excludes merger target s a nd mutual holding companies; peer financial data as of most recent quarter available (3) Reflects non - GAAP metrics; see appendix for further detail (4) Excludes loans held - for - sale New York City Staten Island Manhattan Brooklyn

11 Appraisal Range (1) Adjusted Appraisal Maximum Midpoint Minimum Minimum (2) $shown in millions Peer Median (3) Second Step & Acquisition Assumptions $2,635 $2,291 $1,948 $1,948 Appraisal Value $1,926 $1,675 $1,424 $1,424 Gross Offering Size (73.1% of total) $10.00 $10.00 $10.00 $10.00 Offering Price per Share 2.5340 x 2.2035 x 1.8729 x 1.8729 x Minority Holders Exchange Ratio $25.34 $22.03 $18.73 $18.73 Minority Stock Price at Exchange Ratio $14.65 $14.25 $14.25 $14.25 Acquisition Price per Share to Northfield Pro Forma Valuation 1.24 x 0.98 x 0.94 x 0.89 x 0.87 x P / TBV 10.2 x 15.8 x 14.5 x 13.1 x 11.5 x P / '26E EPS 8.6 x 14.0 x 12.7 x 11.4 x 9.9 x P / '27E EPS Pro Forma Capital Impact at Close 8.6% 17.7% 16.7% 15.5% 13.5% TCE / TA 11.7% 26.9% 25.0% 23.1% 19.8% CET1 14.5% 27.6% 25.7% 23.7% 20.4% TRBC 306% 196% 211% 228% 265% CRE / TRBC (4) Pro Forma Ownership Breakdown 86.0% 84.6% 82.3% 78.6% Columbia Ownership 14.0% 15.4% 17.7% 21.4% Northfield Ownership Transaction Impact At Preliminary Appraisal Source: S&P Global Market Intelligence (1) Appraisal conducted by RP Financial, LC. is based on the midpoint of the offering; th e preliminary Independent appraisal will be updated prior to the S - 1 filing in early March (2) Assumes 100% of the shares issued to NFBK are part of the community offering (3) Peer medians based on compar abl e companies group presented by RP Financial, LC. in their preliminary independent appraisal (peers include KRNY, PFS, WSFS, CCNE, CNOB, DCOM, FCF, NBTB, OCFC, PGC, STBA, TMP and UVSP) based on fi nan cial data as of or for the most recent quarter available (4) Excludes owner - occupied CRE per regulatory definition Note: Market data as of 1/30/2026 Adjusted minimum feature: The adjusted minimum allows for any unsold shares from the subscription offering to be allocated towards the merger shares, r esu lting in a corresponding reduction in outstanding shares upon the completion of the conversion and the merger. The use of an adjusted minimum is subject to regulatory approval as part of the second step conversion transaction. The adjusted minimum feature is accretive to tangible book value and EPS

12 68.4% 56.5% 48.1% CLBK Pro Forma (2nd Step) 2027E Pro Forma (2nd Step + Merger) 2027E 2.36% 2.58% 2.90% CLBK Pro Forma (2nd Step) 2027E Pro Forma (2nd Step + Merger) 2027E 0.57% 0.82% 1.06% CLBK Pro Forma (2nd Step) 2027E Pro Forma (2nd Step + Merger) 2027E Enhanced Performance A Partnership With Northfield Dramatically Improves Profitability Metrics Note: Pro forma financial data shown at the midpoint of the preliminary appraisal. The final appraisal may differ from the pr eli minary appraisal due to market conditions or other factors; Assumes 6/30/2026 transaction close (1) Columbia standalone financial data as of 12/31/2025 (2) Based on a TCE / TA ratio of 9.00% (3 ) U nder Federal Reserve Board regulations, stock repurchases are not permitted during the first year following the completion of the second step conversion Return on Average Assets Net Interest Margin +25bps Identified Ways to Leverage ~$1.4bn (2) of Excess Capital to Drive Shareholder Value Organic Growth Cash Dividends AFS Securities Restructuring +24 bps +22bps +32 bps Efficiency Ratio (8%) (12%) (1) (1) (1) Share Repurchases (3) 1 2 3 4 De - emphasis on bank M&A for the next 18 months

13 0.16% 0.14% 0.08% 0.05% 0.09% 0.09% 0.03% 0.00% 0.03% 0.12% 0.07% 0.09% 0.03% (0.01%) 0.04% (0.04%) 0.11% 0.07% 0.02% 0.15% 0.16% 0.11% 0.16% 0.18% 0.10% 0.23% 0.18% 0.19% 0.10% 0.07% 0.14% 0.16% 0.17% 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 CLBK NFBK Appraisal Peers 66% 71% CLBK Pro Forma (12/31/2025) 18% 28% CLBK Pro Forma (12/31/2025) 182% 115% NYC Peer Median Pro Forma (12/31/2025) 4.5% 1.5% NFBK Pro Forma (12/31/2025) 10.5% 3.3% NFBK Pro Forma (12/31/2025) Strong Underwriting Standards Supported by a Top Tier Balance Sheet History of Prudent Underwriting Culture… NCOs / Avg. Loans …Supported By a De - Risked Loan Portfolio …And Enhanced Liquidity Core Deposits / Deposits (7) Cash & Securities / Assets Source: S&P Global Market Intelligence (1) Peer medians based on the peer group presented by RP Financial, LC. in its indepen den t appraisal (includes KRNY, PFS, WSFS, CCNE, CNOB, DCOM, FCF, NBTB, OCFC, PGC, STBA, TMP and UVSP) (2) Includes all multifamily loans that have rent - regulated units in New York City (in cludes New York County, Kings County, Bronx County, Queens County and Richmond County) (3) Northfield standalone financial data as of 12/31/2025 (4) Includes impact of second step offering and excludes purchase accounting adjustments (5) NYC peers include major exchange traded banks headquartered in the NYC MSA with total assets between $5 billion and $25 billion (includ es PFS, DCOM, OCFC, CNOB, AMAL, MCB, KRNY and PGC); peer financial data per regulatory filings ( 6 ) Columbia standalone financial data as of 12/31/2025 (7) Core deposits defined as total deposits less total CD balances (1) (4) (4) (4) (4) Multifamily / TRBC (6) (6) NY Rent - Regulated (2) / Loans HFI (3) Office / Loans HFI (3) (5) (4)

14 DSCR (x) LTV (%) Balance ($mm) County 1.57x 49.6% $178 Kings 1.68x 50.3% $115 Bronx 1.48x 45.7% $44 New York 1.89x 43.2% $36 Queens 1.35x 59.9% $31 Richmond 1.21x 57.7% $13 Westchester 2.13x 35.3% $2 Nassau 1.60x 49.8% $419 Total 42% 27% 10% 9% 7% 3% 1% Westchester Portfolio by County (1) Kings Bronx New York Queens Richmond Nassau Overview of Northfield’s NY Rent - Regulated Multifamily Portfolio • Low LTV and Conservative Underwriting: Sub - 50% weighted - average LTV combined with a granular loan portfolio ($1.7 million average balance) • Legacy Assets: Portfolio has demonstrated strength through multiple interest rate cycles • Low Historical Loss Rate: Over the past 10 years, NFBK has only charged - off $414 thousand of rent - regulated loans (all related to a single credit) NY Rent - Regulated Portfolio Key Highlights Note: Financial data as of 12/31/2025 (1) Includes all multifamily loans that have rent - regulated units (2) Includes all multifa mily loans that have rent - regulated units in New York (Kings County, Bronx County, New York County, Queens County, Richmond County, Westchester County, and Nassau County) (3) The loan is current as to principal and interest in accordance with its original contractual terms 10% 10% 15% 65% Portfolio by % Regulated Units (1) $419mm Rent - Regulated Portfolio Loans to properties by % of rent - regulated units 100% 60% - 90% 30% - 60% >0% - 30% Portfolio Statistics (1) • Approximately 10.9% or $419 million of loans outstanding are collateralized by properties in New York with units subject to some percentage of rent - regulation • None of the loans that are rent - regulated in New York are interest only • 21 loans with an aggregate principal balance of $50.2 million will re - price in 2026 • Loans to properties with greater than 50% of units that are rent - regulated represent approximately 46% of the total NY multifamily portfolio and have a weighted average DSCR of 1.59x (2) • ~$2.0mm or 0.47% of the portfolio is on non - accrual status (3)

15 Comprehensive Due Diligence • 70+ professionals (inclusive of advisors and consultants) conducted a c omprehensive due diligence review of Northfield over a more than 30 - day period • In person and virtual due diligence review of all functional areas, in addition to business strategies, clients, employees and culture • Heightened diligence focus surrounding loan portfolio and credit administration • Long standing relationship among key principals with significant market knowledge and an emphasis on cultural fit Due Diligence Scope of Review Credit Review Summary • SRA Consulting LLC conducted an independent loan review across all major business lines and loan products achieving over 50% coverage of commercial loans • Columbia staff also reviewed over 50% of the commercial loan portfolio in conjunction with the loan review • Conducted a thorough examination of underwriting and credit standards along with the alignment of credit cultures • Comprehensive loan review consisted of the following: • 100% of all criticized, classified, special mention, and non - accrual loans • Over 50% of the commercial loan portfolio • Comprehensive review of the NYC rent - regulated portfolio consisted of the following: • Both Columbia and SRA reviewed 100% of the NYC rent - regulated multifamily loans • Columbia commissioned geographic based market studies of the rent - regulated portfolio prepared by New York based independent appraisal experts • Columbia’s Collateral Risk Team stress tested the portfolio LTVs. Any loan with a stressed LTV >90% was appraised by a NYC - based independent appraisal firm in January 2026 − The appraisal’s LTV shortfalls total only $2.7 million on 11 loans and confirmed that the stress test assumptions were conservative relative to appraised values • Review resulted in a ~14% combined mark on the NYC rent regulated portfolio (~7% credit mark / ~7% interest rate mark) • Aggregate credit mark of $81.0 million or 2.1% of the portfolio Credit & Loan Review Finance & Accounting Branch Network Commercial & Retail Banking Tax Investment Services Legal & Regulatory HR, IT & Operations ALCO / Liquidity Compliance & Audit Treasury Key Diligence Focus Areas Risk Management

16 Transaction Highlights Leverages a portion of the capital from Columbia’s second step offering to drive improved financial performance and better position the Company for future growth Bolsters Columbia’s position in New Jersey and establishes a robust platform in Brooklyn and Staten Island Attractively priced transaction that balances meaningful EPS accretion with acceptable levels of tangible book value dilution Low risk transaction combining two sound community banking franchises with shared visions, culture and operating philosophies Combines two strong management teams and boards with a wealth of industry experience

17 Appendix

18 6% 31% 9% 8% 20% 22% 3% <1% 1% 4% 4% 10% 61% 13% 5% <1% 18% 27% 14% 12% 29% 18% 35% 7% 21% 18% 18% 24% 17% 7% 34% Pro Forma Loan & Deposit Composition Complementary Lending & Deposit Verticals Note: Financial data as of 12/31/2025 (1) Excludes purchase accounting adjustments (2) Excludes loans classified as PCD and n et deferred loan costs, fees and purchase premiums and discounts (3) Excludes loans classified as PCD (4) Includes all multifamily loans that have rent - regulated units in New York City (New Yor k County, Kings County, Bronx County, Queens County and Richmond County) Deposit Mix Loan Mix Pro Forma (1) Multifamily 1 – 4 Family Home Equity Loans & Advances $8.2bn (2) $8.4bn $3.8bn (3) $4.0bn $12.1bn Other CRE Commercial Owner - Occupied CRE Yield on Loans: 5.03% NY Rent - Regulated / Loans (4) : <0.1% Cost of Interest - bearing Deposits: 2.79% Loans / Deposits: 98.2% $12.4bn NIB Demand Deposits Interest Bearing Demand Deposits Money Market Accounts CDs Savings & Club Deposits NIB Demand Deposits Interest Bearing Demand Deposits Money Market Accounts CDs Savings & Club Deposits NIB Demand Deposits Interest Bearing Demand Deposits Money Market Accounts CDs Savings & Club Deposits Cost of Interest - bearing Deposits: 2.23% Loans / Deposits: 96.0% Cost of Interest - bearing Deposits: 2.61% Loans / Deposits: 97.5% Yield on Loans: 4.77% NY Rent - Regulated / Loans (4) : 10.5% Yield on Loans: 4.95% NY Rent - Regulated (4) / Loans: 3.3% Construction Other Multifamily Owner - Occupied CRE Other CRE Commercial Home Equity Loans & Advances Other Construction 1 – 4 Family 4% 23% 8% 9% 33% 19% 4% <1% Multifamily Other CRE Home Equity Loans & Advances Other Construction 1 – 4 Family Owner - Occupied CRE Commercial

19 Detailed Transaction Assumptions Earnings Cost Savings Merger Expenses Credit Pre - Tax Fair Value Marks Other • CLBK earnings through 2027 per FactSet Consensus Estimates and includes adjustments related to the second step conversion and stock offering • NFBK earnings through 2027 per FactSet Consensus Estimates • Pre - tax cost savings estimated at 35.0% of NFBK non - interest expense, phased in 50% in 2026, 90% in 2027 and 100% thereafter • Pre - tax one - time expenses of $55.0 million (~1.8x 2026E fully - phased in cost savings after - tax or 9.2% of deal value pre - tax) • Gross credit mark of 2.1% of NFBK’s gross loans at close ($81 million, ~2.2x reserves at close) − Review resulted in ~14% combined mark (~7% credit mark / ~7% interest rate mark) on NFBK’s NYC rent - regulated portfolio • Assumes early adoption of FASB’s amendments to ASU 2016 - 13, eliminating non - PCD credit mark and related “double count” • $137.3mm (3.6%) loan portfolio write - down, accreted over 4 years straight line • $0.3mm (3.8%) HTM securities write - down, accreted over 5 years straight line • $1.2mm aggregate write - down of funding liabilities, amortized or accreted over the life of individual liabilities • $5.8mm pre - tax unrealized AFS loss already in equity, accreted over 5 years straight line • Core deposit intangibles of 2.25% or $73.3mm, amortized over 10 years sum - of - the - years - digits • Assumes a 45.0% reduction to interchange income from Durbin Amendment • Assumes NFBK ESOP is terminated at close (~$15 million increase to NFBK’s common equity) • 27.0% marginal effective tax rate on NFBK earnings and merger adjustments

20 ~$18B Pro Forma Assets (1) Note: Financial data as of respective year end; (1) Pro forma assets shown at 6/30/2026 close $10.5B Assets $10.6B Assets $11.0B Assets • Sold 43% of Company • Raised $498 million • Pro Forma TCE: 15.6% Completed IPO $6.7B Assets $8.8B Assets $10.4B Assets • Mutual merger • $422 million in total assets • Net addition of 3 branches Acquired Roselle • Mutual merger • $595 million in total assets • Net addition of 3 branches Acquired RSI $8.2B Assets $9.2B Assets • $136 million cash acquisition • $962 million in total assets • Net addition of 7 branches Acquired Stewardship • Mutual merger • $316 million in total assets • 2 branches added Acquired Freehold Transformative Merger With Northfield & Second Step Offering 2018 2019 2020 2021 2022 2026 2024 2023 2023 2024 2025 Seasoned & Disciplined Acquiror Strong Track Record of Successful M&A Execution Built the Infrastructure to Grow

21 Pro Forma Earnings Per Share & Goodwill Reconciliation 2027 Earnings per Share Goodwill Reconciliation at Close Note: Pro forma financial data shown at the midpoint of the preliminary appraisal. The final appraisal may differ from the pr eli minary appraisal due to market conditions or other factors $ in millions $597.1 Fully Diluted Deal Value 704.3 NFBK Common Equity 15.3 Plus: ESOP Elimination (28.2) Less: NFBK After Tax Restructuring Charge (0.0) Less: NFBK Intangibles 691.4 Tangible Common Equity Purchase Accounting Adjustments: (0.3) Investment Securities Mark (81.0) Gross Loans - Credit Mark 37.3 ALLL Reversal (137.3) Gross Loans - Rate Mark 1.4 Time Deposit Mark (0.4) Borrowings Mark 0.2 Subordinated Debt (180.0) Net FMV Adjustments 48.6 Deferred Tax Asset / (Liability) 560.0 NFBK Adjusted Tangible Common Equity (Pre - CDI) Premium Allocation 73.3 Core Deposit Intangible (19.8) Deferred Tax Asset / (Liability) 613.5 NFBK Adjusted Tangible Common Equity (Inc. CDI) ($16.4) Goodwill Allocation / (Bargain Purchase) 2027E $ in millions, except per share figures $85.3 CLBK Consensus Net Income Additional 2nd Step Income Adjustments: 43.1 Earnings on 2nd Step Net Proceeds (1.7) ESOP Expense (4.0) MRP Expense (3.9) Options Expense (8.1) Capital Management Strategies $110.7 CLBK Adjusted Net Income $0.52 CLBK Adjusted Earnings per Share $56.6 NFBK Net Income After - Tax Merger Adjustments: $22.1 Cost Savings (6.1) Opportunity Cost of Cash (0.7) Durbin Amendment Impact (0.1) Pro Forma REIT Tax Dis - synergy 25.7 Accretion of Interest Rate Marks (7.8) Core Deposit Amortization from Transaction $200.4 Pro Forma Net Income $0.79 Pro Forma Earnings Per Share 51% Estimated Earnings Accretion 0.82% CLBK Standalone ROAA 1.06% CLBK Pro Forma ROAA

22 Pro Forma Tangible Book Value Per Share Reconciliation at Close $10.58 $11.68 ($0.16) $11.16 $1.10 ($0.36) After - Tax Net Merger Consideration & FMV Impacts 2 nd Step Conversion Impact Standalone CLBK TBVPS CLBK Fully Converted Pro Forma CLBK TBVPS After - Tax One - Time Merger Expenses 4.4% TBV Dilution Note: Assumes a consistent appraisal with and without the deal. Pro forma financial data shown at the midpoint of the prelimi nar y appraisal. The final appraisal may differ from the preliminary appraisal due to market conditions or other factors

23 Non - GAAP Reconciliations $000s MRQ Return on Average Assets $5,671,628 Average Assets (27,402) Net / (Loss) income 41,034 Add: Goodwill and Intangible Impairment $13,632 Net Income Excluding Goodwill & Intangible Impairment (1.92%) GAAP ROAA 0.95% Non - GAAP ROAA MRQ Return on Average Total Stockholder’s Equity $722,024 Average Total Stockholders' Equity ($27,402) Net / (Loss) income 41,034 Add: Goodwill and Intangible Impairment $13,632 Net Income Excluding Goodwill & Intangible Impairment (15.06%) GAAP ROAE 7.49% Non - GAAP ROAE MRQ Efficiency Ratio $41,343 Total Revenue 62,076 Total Noninterest Expense (41,034) Less: Goodwill and Intangible Impairment $21,042 Noninterest Expense Excluding Goodwill & Intangible Impairment 150.15% GAAP Efficiency Ratio 50.90% Non - GAAP Efficiency Ratio $000s MRQ Tangible Common Equity / Tangible Assets $5,754,010 Total Assets 0 Less: Goodwill and Core Deposit Intangibles $5,754,010 Non - GAAP Tangible Assets 690,059 Total Stockholders' Equity 0 Less: Goodwill and Core Deposit Intangibles $690,059 Non - GAAP Tangible Stockholders’ Equity 11.99% Non - GAAP Tangible Common Equity / Tangible Assets