Momentus SPAC Presentation Deck

KEY SUBSYSTEMS DEVELOPMENT AND TESTS VIGORIDE VI.O VIGORIDE V2.0 VIGORIDE V2.1 PROPULSION Developed and built Developed Development Complete Q3 2021 AVIONICS Developed and built Flight Delivery October, 2020 Flight Delivery Q2 2021 POWER SYSTEM Developed and built Flight Delivery October, 2020 Flight Delivery Q2 2021 Copyright 2020. Momentus Inc. Proprietary & Confidential. Not Export Controlled. Any use, reproduction, or distribution without the express consent of Momentus is strictly prohibited. If you are not the intended recipient, please immediately delete this document and any associated communications. STRUCTURE Developed and built Developed, Build in Process Flight Delivery Q2 2021 VIBRATION/ VACUUM TESTING Tested, flight-ready Nov 2020 - Jan 2021 September 2021 23

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