Momentus Results Presentation Deck

Q1 Financial Highlights $33 million backlog as of April 30, 2023.* Non-restricted cash and cash equivalents of $39 million as of March 31, 2023. Approximately $12 million term loan debt as of December 31, 2022. Recognized $22 thousand in revenue, which included customer deposit. • Q1 loss from operations was approximately $20 million. Q1 Adjusted EBITDA was negative $16.1 million, an improvement over Q1 2022 of $0.5 million. Adjusted EBITDA excludes stock-based compensation expense, certain legal matters, and net mark-to-market gains and losses on warrant liabilities, and other adjusting items. Refer to the Appendix of this presentation for reconciliation with equivalent GAAP financials. ● ● ● ● Backlog includes signed contracts spanning across 19 companies in 13 countries. Backlog contains firm orders as well as options, which allow customers to opt-in to launches on shorter notice without requiring a separate agreement. In general, our customers have the right to cancel their contracts with the understanding that they will forfeit their deposits. If a customer cancels a contract before it is required to pay non-refundable deposits, we may not receive revenue from these orders, except for an initial deposit which is paid at the time the contract is signed. Copyright 2023. Momentus Inc. Not Export Controlled. Any use, reproduction, or distribution without the express consent of Momentus is strictly prohibited. 14

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