Momentus Results Presentation Deck

CY 2023 Cash Flow Statement View from Vigoride-5 MOMENTUS INC. CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (in thousands) Cash flows from operating activities: Net loss Adjustments to reconcile net loss to net cash used in operating activities: Depreciation and amortization Amortization of debt discount and issuance costs Amortization of right-of-use asset Change in fair value of warrant liability Loss on disposal of property, machinery, equipment and intangible assets Stock-based compensation expense Issuance of common stock to non-employees Changes in operating assets and liabilities: Prepaids and other current assets Other non-current assets Accounts payable Accrued expenses Accrued interest Other current liabilities Contract liabilities Lease liability Other non-current liabilities Net cash used in operating activities Cash flows from investing activities: Purchases of property, machinery and equipment Purchases of intangible assets Net cash used in investing activities Cash flows from financing activities: Proceeds from exercise of stock options Repurchase of Section 16 Officer shares for tax coverage exchange Principal payments on loan payable Payment of deferred offering costs Payment for repurchase of common shares Proceeds from issuance of common stock and related warrants Payments for issuance costs related to common stock and related warrants Net cash used in financing activities Decrease in cash, cash equivalents and restricted cash Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Supplemental disclosure of non-cash investing and financing activities Purchases of intangibles assets in accounts payable and accrued expenses at period end Deferred offering costs in accounts payable and accrued expenses at period end Stock repurchase liability fair value Supplemental disclosure of cash flow information Cash paid for income taxes Cash paid for interest Three Months Ended March 2023 2022 $ $ $ S $ S (20,825) $ 229 492 267 112 1,720 57 704 41 (211) (1,538) 39 12 481 (282) 6 (18,696) (43) (9) (52) 92 (60) (3,102) (23) (10,000) 10,000 (700) (3,793) (22,541) 62,413 39,872 S 7 $ 64 $ 69 69 $ 389 $ (26,834) 294 742 322 451 70 2,212 1,447 (2,685) 1,387 (273) 13 14 100 (328) 6 (23,062) (290) (231) (521) 48 (59) (927) (938) (24,521) 160,547 136,026 6,000 750 19

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