As of November 6, 2026, Momentus Inc. has Schedule 13D or 13G filings on record, none whose latest reports a stake of 5% or more. 6 filings are on record since August 14, 2025 (Schedule 13G/A, August 14, 2026).
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Key facts
- · Reporting person: M.H. Davidson & Co. · Sole voting: 0 · Shared voting: 15,471 · Sole dispositive: 0 · Shared dispositive: 15,471 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: Citadel Advisors LLC · Sole voting: 0 · Shared voting: 248,366 · Sole dispositive: 0 · Shared dispositive: 248,366 · SCHEDULE 13G/A, 2026-08-14
- · Holder: Davidson Kempner Capital Management LP · Percent: 8.9% · SCHEDULE 13G
- · Holder: M.H. Davidson & Co. · Percent: 0% · SCHEDULE 13G
- · Holder: Kenneth Griffin · Percent: 9.99% · SCHEDULE 13G
Momentus Inc. has 6 Schedule 13D or 13G filings on record since 2025-08-14. No holder's latest filing reports 5% or more. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Armistice Capital, LLC | 4.99% | 209,340 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| Davidson Kempner Capital Management LP | 4.51% | 850,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| 1.6% | 309,865 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
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More on Momentus Inc. and the records around it.
Momentus Inc. elsewhere on the record
- Form D filing Oct 2025
- Form D filing May 2025
- Who owns it
Companies that share a holder
- M.H. Davidson & Co. also filed stake reports on 17 other companies: Greenland Mines Ltd (Sep 2026), Qtrex Quantum Ltd. (Aug 2026), AIB Data Centers Inc. (Aug 2026)
- Citadel Advisors LLC also filed stake reports on 58 other companies: Quantinuum Inc. (Oct 2026), REALLOYS INC. (Oct 2026), STARFIGHTERS SPACE, INC. (Oct 2026)
- Armistice Capital, LLC also filed stake reports on 120 other companies: Autolus Therapeutics plc (Aug 2026), Bicycle Therapeutics plc (Aug 2026), BioXcel Therapeutics, Inc. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| M.H. Davidson & Co. | 0 | 15,471 | 0 | 15,471 | SCHEDULE 13G/A, 2026-08-14 |
| Davidson Kempner Arbitrage, Equities & Relative Value LP | 0 | 834,529 | 0 | 834,529 | SCHEDULE 13G/A, 2026-08-14 |
| Davidson Kempner Capital Management LP | 0 | 850,000 | 0 | 850,000 | SCHEDULE 13G/A, 2026-08-14 |
| Anthony A. Yoseloff | 0 | 850,000 | 0 | 850,000 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel Advisors LLC | 0 | 248,366 | 0 | 248,366 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel Advisors Holdings LP | 0 | 248,366 | 0 | 248,366 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel GP LLC | 0 | 248,366 | 0 | 248,366 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel Securities LLC | 0 | 61,499 | 0 | 61,499 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel Securities Group LP | 0 | 61,499 | 0 | 61,499 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel Securities GP LLC | 0 | 61,499 | 0 | 61,499 | SCHEDULE 13G/A, 2026-08-14 |
| Kenneth Griffin | 0 | 309,865 | 0 | 309,865 | SCHEDULE 13G/A, 2026-08-14 |
The latest filing identifies Momentus Inc. by CUSIP 60879E408 and gives its principal executive office as 1762 AUTOMATION PARKWAY, SAN JOSE, CA 95131 (SCHEDULE 13G/A, 2026-08-14).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | Armistice Capital, LLC | 4.99% | SCHEDULE 13G/A |
| 2026-04-22 | Kenneth Griffin | 9.99% | SCHEDULE 13G |
| 2026-05-15 | M.H. Davidson & Co. | 0% | SCHEDULE 13G |
| 2026-05-28 | Davidson Kempner Capital Management LP | 8.9% | SCHEDULE 13G |
| 2026-08-14 | Davidson Kempner Capital Management LP | 4.51% | SCHEDULE 13G/A |
| 2026-08-14 | Kenneth Griffin | 1.6% | SCHEDULE 13G/A |
Also on the record for Momentus Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 2, 2025 | Form D, private offering | $1.63M sold | Form D page | Source |
| May 9, 2025 | Form D, private offering | $248K sold | Form D page | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.