Order-to-Cash Solution Overview

Important Notices This presentation is provided for informational purposes only and has been prepared to assist interested parties in making their own evaluation with respect to the proposed business combination (the "Business Combination") between North Mountain Merger Corp. ("North Mountain") and Corcentric, Inc. ("Corcentric") and the related transactions. In connection with the proposed Business Combination, North Mountain has filed a registration statement on Form S-4 (the "Registration Statement") with the U.S. Securities and Exchange Commission (the "SEC"). The Registration Statement includes preliminary proxy materials that will be distributed to North Mountain's shareholders in connection with its solicitation for voting proxies in respect of the proposed Business Combination and other matters described in the Registration Statement, as well as a prospectus relating to the offer of North Mountain's securities to be issued in the proposed Business Combination. Investors, shareholders and other interested parties are advised to read the Registration Statement (and all amendments thereto) as well as other documents filed by North Mountain with the SEC in connection with the proposed Business Combination because these documents will contain important information about Corcentric, North Mountain and the proposed Business Combination. The definitive proxy statement/prospectus will be mailed to North Mountain's shareholders as of the record date established for voting on the proposed Business Combination. Interested parties will also be able to obtain copies of such documents, without charge, at the SEC's website located at www.sec.gov or by directing a request to North Mountain Merger Corp., 767 Fifth Avenue, 9th Floor, New York, NY, 10153, ATTN: Secretary, or by calling (646) 446-2700. No Representations or Warranties No representation or warranties, express or implied, are given in, or in respect of, this presentation. To the fullest extent permitted by law, in no circumstances will North Mountain, Corcentric or any of their respective subsidiaries, stockholders, affiliates, representatives, partners, directors, officers, employees, investment banks, advisers or agents be responsible or liable for any direct, indirect or consequential loss or loss of profit arising from the use of this presentation, its contents, its omissions, reliance on the information contained within it, or on opinions communicated in relation thereto or otherwise arising in connection therewith. Industry and market data used in this presentation have been obtained from third-party industry publications and sources as well as from research reports prepared for other purposes that North Mountain and Corcentric believe are reasonable. Neither North Mountain nor Corcentric has independently verified the data obtained from these sources and cannot assure you of the data's accuracy or completeness. This data is subject to change. In addition, this presentation does not purport to be all-inclusive or to contain all of the information that may be required to make a full analysis of North Mountain, Corcentric or the Business Combination. Viewers of this presentation should each make their own evaluation of North Mountain and Corcentric, and of the relevance and adequacy of the information and should make such other investigations as they deem necessary. In addition, this presentation is not, and does not purport to be, an appraisal of the securities, assets or business of North Mountain, Corcentric or any other entity. North Mountain and Corcentric reserve the right to amend or replace this presentation at any time but none of North Mountain, Corcentric, their subsidiaries, affiliates, legal advisors or financial advisors shall have any obligation to update or supplement any content set forth in this presentation or otherwise provide any additional information to the recipient should circumstances, or management's estimates or opinions, change or any information provided in this presentation become inaccurate. The statements in this presentation, including all forward-looking statements, should not be relied upon as representing North Mountain and Corcentric's assessments as of any date subsequent to the date of this presentation. Forward-Looking Statements Certain statements, estimates, targets and projections in this presentation may be considered forward-looking statements within the meaning of the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements generally relate to future events, or involve the future performance of, Corcentric and North Mountain. For example, statements regarding the benefits of the proposed Business Combination, the anticipated timing of the proposed Business Combination, projections of future revenue or EBITDA, statements regarding anticipated growth in the industry in which Corcentric operates and anticipated growth in demand for Corcentric's products or services, projections of Corcentric's future financial results and other metrics are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as "pro forma", "may", "plan", "possible", "project", "strive", "budget", "forecast", "expect", "intend", "will", "estimate", "anticipate", "believe", "predict", "potential" or "continue", or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or implied by such forward looking statements. These forward-looking statements are based on current estimates and assumptions that are based on management's current expectations and subject to numerous risks and uncertainties. Factors that may cause actual results to differ materially from current expectations include, but are not limited to: the ability to meet stock exchange listing standards following the consummation of the Business Combination; the risk that a business combination disrupts current plans and operations of Corcentric; the ability to recognize the anticipated benefits of a business combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain its management and key employees; costs related to a business combination; changes in applicable laws or regulations; the possibility that Corcentric or the combined company may be adversely affected by other economic, business, regulatory, and/or competitive factors; Corcentric's estimates of expenses and profitability; the evolution of the markets in which Corcentric competes; the inability of Corcentric to implement its business plan; the inability of Corcentric to satisfy regulatory and licensing requirements; the impact of the COVID-19 pandemic on Corcentric's business. While the forward-looking statements included in this presentation, including the projected financial information, have been made in good faith and are based on assumptions we believe to be reasonable, there is no assurance the expected results will be achieved. Corcentric's actual results may differ materially based on the risks and uncertainties noted and incorporated herein, and the inclusion of such information in the presentation should not be regarded as a representation by any person that the results reflected in such projections and other forward-looking statements will be achieved. The risks and uncertainties described and incorporated in this presentation are not the only risks and uncertainties Corcentric may face. Additional risks and uncertainties not presently known to Corcentric, or that Corcentric currently considers immaterial, could also negatively affect the business, financial condition, results of operations, prospects, profits and value of the securities of Corcentric. You should read and carefully consider the other information in this presentation and the section entitled "Risk Factors" in the Registration Statement. corcentric 1