Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Momentus Inc.

CIK 0001781162MNTS· quarter ending 2026-06-30

Shares outstanding

21,963,401

as of 2026-08-10 · 10-Q cover page, filed 2026-08-11

Held by 13F filers

2,556,775

11.6% of shares outstanding

Holders

+31 vs 2026-03-31 · 35 new, 4 exited

Value

$17.2M

shares +1250.2% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-11, as of 2026-08-10)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	MNTS · NASDAQ	21,963,401	2,556,775	11.6%	45	60879E408

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	60879E408	COM CL A	45	2,556,775	21,963,401	11.6%	$17.2M	3 call / 3 put	13DG	holders →
	60879E119	*W EXP 08/12/202not common	13	1,713,099	—	—	$29K	—	prefix	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 3 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (45 of 45 · 60879E408)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Davidson Kempner Capital Management LP	850,000	3.87%	$5.7M	NEW
2	BlackRock, Inc.	351,504	1.60%	$2.4M	+351,461 (+817351.2%)
3	CITADEL ADVISORS LLC	294,365	1.34%	$2.0M	NEW
4	Weiss Asset Management LP	179,416	0.82%	$1.2M	NEW
5	Jefferies Financial Group Inc.	146,000	0.66%	$981K	NEW
6	UBS Group AG	142,403	0.65%	$957K	+136,343 (+2249.9%)
7	GEODE CAPITAL MANAGEMENT, LLC	118,712	0.54%	$798K	+96,942 (+445.3%)
8	VANGUARD CAPITAL MANAGEMENT LLC	115,779	0.53%	$778K	+113,550 (+5094.2%)
9	STATE STREET CORP	74,176	0.34%	$498K	NEW
10	Penserra Capital Management LLC	64,782	0.29%	$435K	-65,623 (-50.3%)
11	VANGUARD FIDUCIARY TRUST CO	54,303	0.25%	$365K	+51,550 (+1872.5%)
12	NORTHERN TRUST CORP	22,405	0.10%	$151K	NEW
13	LPL Financial LLC	20,826	0.09%	$140K	NEW
14	GSA CAPITAL PARTNERS LLP	19,512	0.09%	$131K	NEW
15	Engineers Gate Manager LP	15,300	0.07%	$103K	NEW
16	Parisi Gray Wealth Management	12,154	0.06%	$82K	NEW
17	SUSQUEHANNA INTERNATIONAL GROUP, LLP	11,776	0.05%	$79K	NEW
18	Pure Financial Advisors, LLC	10,001	0.05%	$67K	NEW
19	Legacy Capital Wealth Partners, LLC	10,000	0.05%	$67K	NEW
20	INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC	10,000	0.05%	$65K	NEW
21	OSAIC HOLDINGS, INC.	7,526	0.03%	$51K	+7,441 (+8754.1%)
22	Vanguard Global Advisers, LLC	5,708	0.03%	$38K	NEW
23	MORGAN STANLEY	4,547	0.02%	$31K	NEW
24	SBI Securities Co., Ltd.	3,207	0.01%	$22K	+2,699 (+531.3%)
25	SIMPLEX TRADING, LLC	2,446	0.01%	$16K	NEW
26	Global Retirement Partners, LLC	1,911	0.01%	$13K	NEW
27	JONES FINANCIAL COMPANIES LLLP	1,603	0.01%	$11K	+1,581 (+7186.4%)
28	NATIONAL BANK OF CANADA /FI/	1,065	0.00%	$7K	NEW
29	Federation des caisses Desjardins du Quebec	1,000	0.00%	$7K	NEW
30	PNC Financial Services Group, Inc.	940	0.00%	$6K	NEW
31	Larson Financial Group LLC	700	0.00%	$5K	NEW
32	FMR LLC	600	0.00%	$4K	NEW
33	Ameritas Advisory Services, LLC	450	0.00%	$3K	NEW
34	WELLS FARGO & COMPANY/MN	400	0.00%	$3K	NEW
35	TSFG, LLC	350	0.00%	$2K	NEW
36	Farther Finance Advisors, LLC	250	0.00%	$2K	NEW
37	Lloyd Advisory Services, LLC.	175	0.00%	$1K	NEW
38	NewEdge Advisors, LLC	125	0.00%	$840	NEW
39	ROYAL BANK OF CANADA	116	0.00%	$1K	NEW
40	TD Waterhouse Canada Inc.	100	0.00%	$650	NEW
41	US BANCORP \DE\	60	0.00%	$403	NEW
42	SWAN Capital LLC	45	0.00%	$302	NEW
43	WOLVERINE ASSET MANAGEMENT LLC	26	0.00%	$175	NEW
44	Comprehensive Financial Planning, Inc./PA	10	0.00%	$67	NEW
45	DANSKE BANK A/S	1	0.00%	$7	—

Exited since 2026-03-31 (4 filers; largest 4 shown)

Virtu Financial LLC	−22,025
Tower Research Capital LLC (TRC)	−1,895
Elequin Capital, LP	−1,461
Clear Street Group Inc.	−100

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Citadel Securities Group LP	SCHEDULE 13G/A	2026-08-14	2026-06-30	61,499	0.3%
Citadel Advisors Holdings LP	SCHEDULE 13G/A	2026-08-14	2026-06-30	248,366	1.3%
Citadel Advisors LLC	SCHEDULE 13G/A	2026-08-14	2026-06-30	248,366	1.3%
Citadel GP LLC	SCHEDULE 13G/A	2026-08-14	2026-06-30	248,366	1.3%
Citadel Securities GP LLC	SCHEDULE 13G/A	2026-08-14	2026-06-30	61,499	0.3%
Anthony A. Yoseloff	SCHEDULE 13G/A	2026-08-14	2026-06-30	850,000	4.51%
Citadel Securities LLC	SCHEDULE 13G/A	2026-08-14	2026-06-30	61,499	0.3%
Davidson Kempner Arbitrage, Equities & Relative Value LP	SCHEDULE 13G/A	2026-08-14	2026-06-30	834,529	4.43%
Davidson Kempner Capital Management LP	SCHEDULE 13G/A	2026-08-14	2026-06-30	850,000	4.51%
Kenneth Griffin	SCHEDULE 13G/A	2026-08-14	2026-06-30	309,865	1.6%
M.H. Davidson & Co.	SCHEDULE 13G/A	2026-08-14	2026-06-30	15,471	0.08%
Armistice Capital, LLC	SCHEDULE 13G/A	2025-08-14	2025-06-30	209,340	4.99%
Steven Boyd	SCHEDULE 13G/A	2025-08-14	2025-06-30	209,340	4.99%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.