[July 30, 2026]

Momentus Delivering On-Orbit Success as Vigoride 7 Maneuvers Cleanly and Payload Mission Execution Continues

Momentus Inc. (NASDAQ: MNTS) ("Momentus" or the "Company"), a U.S. commercial space company specializing in satellite technology, space transportation, and in-orbit services, today announced its Vigoride 7 Orbital Service Vehicle (OSV) has successfully completed another key milestone during its mission, which is scheduled to last for several months. The Vigoride 7 mission began on March 30, 2026 when the OSV was launched to low-Earth orbit on the SpaceX Transporter 16 mission. The Vigoride 7 OSV is carrying 10 payloads for a range of customers including NASA and U.S. Defense Department/Department of War organizations and commercial customers.

The Vigoride 7 OSV has completed a series of orbit-lowering maneuvers, reducing its altitude nearly 20 km through more than 50 controlled and precisely timed operations of both of its on-board Microwave Electrothermal Thrusters (METs) that utilize water as its propellant. The innovative Momentus MET has now cumulatively been used over 400 times to maneuver the Vigoride spacecraft on the Company's missions since 2023 demonstrating the maturity of this proprietary system.

In addition to completing orbit-lowering maneuvers, Momentus and its mission partners continue to operate hosted payloads on the Vigoride 7 mission. Two hosted payloads developed by Momentus are showing good results.

• Vigoride's momentum wheels, flown on the vehicle for the first time, are working smoothly and responding to commands as expected.
• Flight testing of a titanium, additively manufactured fuel tank designed by Momentus is going well and holding pressure as expected. The flight test of this fuel tank is a key step in demonstrating the potential of additive manufacturing, otherwise known as 3D printing, to accelerate innovation in spacecraft design, reduce production timelines, and enable complex geometries that improve performance of mission-critical spacecraft components. The Momentus designed fuel tank is of the type that is in high demand as smal satellites are produced in much greater numbers.

"We're proud of the performance that our satellite technologies, including our Vigoride 7 spacecraft, continue to show in orbit," said John Rood, CEO of Momentus. "We leverage the many decades of space experience of our engineering and technology team and the experience gained on our past missions since 2022 to provide cost-effective results for our customers who, like Momentus, operate at the cutting-edge of space technology."

The Company's upcoming fully-booked Vigoride 8 mission is scheduled to fly in 2027 carrying two NASA payloads. Momentus has also begun work on its Vigoride 9 spacecraft. Momentus still has capacity available on the Vigoride-9 mission, and organizations interested in securing a payload slot can contact the Momentus Commercial team at [email protected].

About Momentus

Momentus is a U.S. commercial space company offering satellites, satellite components, and in-space transportation and infrastructure services. Through its Vigoride orbital service vehicle, the Company delivers hosted payload support, last-mile delivery, and servicing capabilities tailored to scalable mission architectures.

Forward-Looking Statements

This press release contains certain statements which may constitute "forward-looking statements" for purposes of the federal securities laws. Forward-looking statements include, but are not limited to, statements regarding the expected filing of the Company's Form 10-K and Form 10-Q and 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. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of Momentus' control. Many factors could cause actual future events to differ materially from the forward-looking statements in this press release, including but not limited to risks and uncertainties included under the heading "Risk Factors" in the Annual Report on Form 10-K filed by the Company on March 31, 2026, as such factors may be updated from time to time in our other filings with the Commission, accessible on the Commission's website at www.sec.gov and the Investor Relations section of our website at investors.momentus.space. Forward-looking statements speak only as of the date they are made. 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 of new information, future events, or otherwise.

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