SCHEDULE 13G Filed 2026-05-28 Event — SEC 0000919574-26-003737 →

DAVIDSON KEMPNER CAPITAL MANAGEMENT LP → Momentus Inc. MNTSW

Stake: — Shares: — Class: Class A Common Stock, par value $0.00001 per share

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

4 transactions

3 buys · 0 sales · 1 awards/exercises

Issuer Cluster

4 13D/G filings on this issuer

3 other filings besides this one

Filer Track Record

17 filings by this filer

16 other filings in the data moat

Short Interest · settle 2026-07-15

DTC 1.15

142,465 shares short · +3.7% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-05-19	SCHWARZ ROBERT E	officer	Award	6,457	—	—
2026-05-19	SCHWARZ ROBERT E	officer	Award	10,635	—	—
2026-05-18	Hadfield Chris	director	Option exercise	913	—	—
2026-05-18	Hadfield Chris	director	Award	6,039	—	—

Other 13D/G Filings on Momentus Inc.

Filed	Form	Filer	Stake	Shares
2023-06-12	SC	Prime Movers Lab Fund I LP	—	—	view →
2022-02-18	SC	Prime Movers Lab Fund I LP	—	—	view →
2022-02-11	SC	SRC-NI Holdings LLC	—	—	view →

Other Filings by DAVIDSON KEMPNER CAPITAL MANAGEMENT LP

Filed	Form	Issuer	Stake	Shares
2026-07-16	SCHEDULE 13D/A	Angel Oak Mortgage REIT, Inc.	5.01%	1,158,320	view →
2026-07-08	SCHEDULE 13G	FreeCast, Inc. CAST	—	—	view →
2026-07-07	SCHEDULE 13G	PowerBank Corporation PBK	—	—	view →
2026-06-22	SCHEDULE 13G	Humacyte, Inc. HUMAW	—	—	view →
2026-06-15	SCHEDULE 13G	BlockchAIn Digital Infrastructure, Inc. AIB	—	—	view →
2026-06-08	SCHEDULE 13G	Serve Robotics Inc. SERV	—	—	view →
2026-05-21	SCHEDULE 13D/A	Angel Oak Mortgage REIT, Inc. AOMN	8.04%	1,858,320	view →
2025-05-05	SCHEDULE	Vacasa, Inc.	—	—	view →
2025-03-24	SCHEDULE	Vacasa, Inc.	19.99%	13,865,908	view →
2025-03-24	SCHEDULE	Playa Hotels & Resorts N.V.	—	—	view →
2025-03-17	SCHEDULE	Vacasa, Inc.	19.99%	13,865,908	view →
2025-03-03	SCHEDULE	Vacasa, Inc.	19.99%	13,865,908	view →
2025-02-07	SCHEDULE	Trinity Place Holdings Inc. TPHS	—	—	view →
2025-02-03	SCHEDULE	Vacasa, Inc.	19.99%	13,865,908	view →
2024-09-19	SC	Angel Oak Mortgage REIT, Inc. AOMN	—	—	view →
2023-01-23	SC	ACORDA THERAPEUTICS INC	—	—	view →

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