Momentus Results Presentation Deck

Q2 Financial Highlights ● $32 million backlog as of June 30, 2023.* • Non-restricted cash and cash equivalents of $20 million as of June 30, 2023. Approximately $9 million term loan debt as of June 30, 2023. Recognized $1.7 million in revenue, which included V5 and V6 missions. Q2 loss from operations was approximately $19 million. Q2 Adjusted EBITDA was negative $14.4 million, an improvement over Q2 2022 of $3.8 million. ● ● This Document is Public Domain ● ● 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 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. 14

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