Momentus Results Presentation Deck

Disclaimer and Cautionary Note Regarding Forward-Looking Statements and Non-GAAP Financial Measures Forward-Looking Statements This presentation contains certain statements which constitute "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Exchange Act of 1934. Forward- looking statements include, but are not limited to, statements regarding future financial results, future operations, future financial position, projected costs, objectives of management, and other statements regarding Momentus' or its management team's expectations, hopes, beliefs, intentions or strategies regarding the future, projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, and are not guarantees of future performance. The words "may," "will," "anticipate," "believe, "expect," "continue," could," "estimate," "future," "intends," "may," "might," "plan," "possible," "potential," "aim," "strive," "predict," "project," "should," "would" and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. Many factors could cause actual future events to differ materially from the forward-looking statements in this presentation, including but not limited to risks related to the ability of the Company to raise additional capital to finance its longer-term business plan; obtaining licenses and goverment approvals for our missions; delays or impediments in vehicle development, manufacture, test and deployment; the harsh and unpredictable environment of space in which our products operate; increased competition in our industry due in part to rapid technological development; delays or impediments in the development, manufacture and deployment of our vehicles; failure of our vehicles and components to operate as intended either due to error in design in production or through no fault of our own; launch schedule disruptions; supply chain disruptions; product delays or failures; design and engineering flaws; launch failures or other events that force us to cancel or reschedule launches; our ability to convert backlog or inbound inquiries into revenue; and investigations, claims, disputes, enforcement actions, litigation and/or other regulatory or legal proceedings. These are only some of the factors that may affect the forward-looking statements contained in this presentation. For a discussion identifying additional important factors that could cause actual results to differ materially from those anticipated in the forward-looking statements, see the Company's filings with the U.S. Securities and Exchange Commission including, but not limited to, "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Risk Factors" in the Company's Annual Report on Form 10-K for the year ended Dec. 31, 2022 and subsequent quarterly reports on Form 10-Q. The Company's filings may be accessed through the Investor Relations page of its website, investors.momentus.space, or through the website maintained by the SEC at www.sec.gov. Forward-looking statements speak only as of the date they are made. There can be no assurance that we will achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Moreover, it is not possible for our management to predict all risks or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. You should read this presentation with the understanding that our actual returns may be materially different from the plans, intentions and expectations disclosed in the forward-looking statements we make. Readers are cautioned not to put undue reliance on forward-looking statements, and, except as required by law, the Company assumes no obligation and does not intend to update or revise these forward-looking statements, whether as a result or new information, future events, or otherwise. The technology underlying our anticipated service offerings is still in the process of being developed and has not been fully tested or validated in space. Our ability to execute on our business plan is dependent on the successful development and commercialization of our technologies. Development of space technologies is extremely complex, time consuming, and expensive, and there can be no assurance that our predicted theoretical and ground-based results will translate into operational space vehicles that operate within the parameters we expect, or at all. Use of Non-GAAP Financial Measures This presentation references certain non-GAAP financial measures, including adjusted EBITDA, non-GAAP selling, general, and administrative expense and non-GAAP research and development expense. Momentus defines adjusted EBITDA as earnings before interest expense, taxes, depreciation and amortization, stock-based compensation, and certain other items Momentus believes are not indicative of its core operating performance. Momentus defines non-GAAP selling, general, and administrative expenses and research and development expenses as those respective GAAP amounts, excluding stock-based compensation and non-- recurring items not indicative of core operating performance. None of these non-GAAP financial measures is a substitute for or superior to measures of financial performance prepared in accordance with generally accepted accounting principles in the United States (GAAP) and should not be considered as an alternative to any other performance measures derived in accordance with GAAP. Momentus believes that presenting these non-GAAP financial measures provides useful supplemental information to investors about Momentus that is helpful in understanding and evaluating Its operating returns, enhancing the overall understanding of its past performance and future prospects, and allowing for greater transparency with respect to key financial metrics used by its management in financial and operational-decision making. However, there are a number of limitations related to the use of non-GAAP measures and their nearest GAAP equivalents. For example, other companies may calculate non-GAAP measures differently, or may use other measures to calculate their financial performance, and therefore any non-GAAP measures Momentus uses may not be directly comparable to similarly titled measures of other companies. Copyright 2023. Momentus Inc. Not Export Controlled. Any use, reproduction, or distribution without the express consent of Momentus is strictly prohibited. 2

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