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.

Iron Horse Acquisition II Corp.

CIK 0002051985IRHOIRHORIRHOU· quarter ending 2026-06-30

Shares outstanding

29,320,000

as of 2026-07-13 · 10-Q cover page, filed 2026-07-13

Held by 13F filers

19,542,255

66.7% of shares outstanding

Holders

+13 vs 2026-03-31 · 17 new, 4 exited

Value

$196.0M

shares +29.5% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-07-13, as of 2026-07-13)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	IRHO · NASDAQ	29,320,000	19,542,255	66.7%	55	46283H103

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

CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
46283H103	COM	55	19,542,255	29,320,000	66.7%	$196.0M	—	13DG	holders →
46283H202	UNIT 07/11/2030not common	10	2,640,538	—	—	$27.0M	—	13DG	holders →
46283H129	RIGHT 07/11/2030not common	50	18,124,596	—	—	$3.0M	—	NPORT	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.

Top holders (55 of 55 · 46283H103)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	MMCAP International Inc. SPC	1,500,000	5.12%	$15.0M	NEW
2	Linden Advisors LP	1,500,000	5.12%	$15.0M	—
3	Magnetar Financial LLC	1,500,000	5.12%	$15.0M	—
4	AQR Arbitrage LLC	1,119,868	3.82%	$11.2M	+192,667 (+20.8%)
5	GLAZER CAPITAL, LLC	908,336	3.10%	$9.1M	+640,582 (+239.2%)
6	PICTON MAHONEY ASSET MANAGEMENT	900,000	3.07%	$9.0M	—
7	Polar Asset Management Partners Inc.	800,000	2.73%	$8.0M	—
8	Wealthspring Capital LLC	736,510	2.51%	$7.4M	NEW
9	BNP PARIBAS FINANCIAL MARKETS	649,135	2.21%	$6.5M	+68,624 (+11.8%)
10	Radcliffe Capital Management, L.P.	607,182	2.07%	$6.1M	—
11	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	602,165	2.05%	$6.0M	NEW
12	First Trust Capital Management L.P.	600,000	2.05%	$6.0M	—
13	TENOR CAPITAL MANAGEMENT Co., L.P.	547,508	1.87%	$5.5M	—
14	HIGHBRIDGE CAPITAL MANAGEMENT LLC	503,684	1.72%	$5.1M	+388,230 (+336.3%)
15	HEIGHTS CAPITAL MANAGEMENT, INC	470,000	1.60%	$4.7M	—
16	MANGROVE PARTNERS IM, LLC	450,000	1.53%	$4.5M	—
17	TIG Advisors, LLC	400,000	1.36%	$4.0M	NEW
18	Context Capital Management, LLC	400,000	1.36%	$4.0M	—
19	Hudson Bay Capital Management LP	379,148	1.29%	$3.8M	—
20	Kryger Capital LLC	378,052	1.29%	$3.8M	+98,260 (+35.1%)
21	TWO SIGMA INVESTMENTS, LP	362,500	1.24%	$3.6M	—
22	WHITEBOX ADVISORS LLC	350,000	1.19%	$3.5M	—
23	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	300,000	1.02%	$3.0M	+100,000 (+50.0%)
24	MILLENNIUM MANAGEMENT LLC	300,000	1.02%	$3.0M	NEW
25	HGC Investment Management Inc.	298,489	1.02%	$3.0M	NEW
26	Alberta Investment Management Corp	250,000	0.85%	$2.5M	—
27	Mint Tower Capital Management B.V.	250,000	0.85%	$2.5M	—
28	BERKLEY W R CORP	247,850	0.85%	$2.5M	—
29	SONA ASSET MANAGEMENT (US) LLC	244,139	0.83%	$2.4M	—
30	JPMORGAN CHASE & CO	218,809	0.75%	$2.2M	NEW
31	Meteora Capital, LLC	217,449	0.74%	$2.2M	-201,364 (-48.1%)
32	Shaolin Capital Management LLC	209,075	0.71%	$2.1M	-41,026 (-16.4%)
33	Periscope Capital Inc.	150,000	0.51%	$1.5M	+62,000 (+70.5%)
34	Yakira Capital Management, Inc.	146,907	0.50%	$1.5M	NEW
35	TORONTO DOMINION BANK	131,057	0.45%	$1.3M	NEW
36	WOLVERINE ASSET MANAGEMENT LLC	113,268	0.39%	$1.1M	-88,532 (-43.9%)
37	L1 Global Manager Pty Ltd	100,000	0.34%	$1.0M	—
38	O'Connor Alternative Investments LLC	100,000	0.34%	$1.0M	NEW
39	MOORE CAPITAL MANAGEMENT, LP	100,000	0.34%	$1.0M	—
40	Karpus Management, Inc.	78,675	0.27%	$789K	+33,675 (+74.8%)
41	SummitTX Capital, L.P.	57,061	0.19%	$572K	NEW
42	PRELUDE CAPITAL MANAGEMENT, LLC	55,000	0.19%	$552K	NEW
43	Stoic Point Capital Management LLC	55,000	0.19%	$552K	NEW
44	RIVERNORTH CAPITAL MANAGEMENT, LLC	49,900	0.17%	$499K	-100 (-0.2%)
45	Kepos Capital LP	40,000	0.14%	$401K	NEW
46	PenderFund Capital Management Ltd.	25,800	0.09%	$259K	+20,800 (+416.0%)
47	FNY Investment Advisers, LLC	25,000	0.09%	$250K	NEW
48	DELTEC ASSET MANAGEMENT LLC	25,000	0.09%	$251K	—
49	MIZUHO SECURITIES USA LLC	20,974	0.07%	$207K	—
50	Ionic Capital Management LLC	18,875	0.06%	$189K	NEW
51	Virtu Financial LLC	15,344	0.05%	$154K	-9,238 (-37.6%)
52	UBS Group AG	14,753	0.05%	$148K	+13,548 (+1124.3%)
53	SUSQUEHANNA INTERNATIONAL GROUP, LLP	11,000	0.04%	$110K	—
54	Clear Street Group Inc.	8,740	0.03%	$88K	-105,654 (-92.4%)
55	MORGAN STANLEY	2	0.00%	$20	NEW

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

CSS LLC/IL	−737,555
Ilex Capital Partners (UK) LLP	−400,000
Sculptor Capital LP	−249,938
ROYAL BANK OF CANADA	−21,679

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
MM Asset Management Inc.	SCHEDULE 13G/A	2026-05-11	2026-03-31	1,500,000	5.1%
MMCAP International Inc. SPC	SCHEDULE 13G/A	2026-05-11	2026-03-31	1,500,000	5.1%
LMR Partners LLC	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
LMR Partners LLP	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
SUPERNOVA MANAGEMENT LLC	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.11%
Stefan Renold	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
DAVID J. SNYDERMAN	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.11%
LMR Partners AG	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
LMR PARTNERS (DIFC) Ltd	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
LMR Partners (Ireland) Limited	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
Ben Levine	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
MAGNETAR FINANCIAL LLC	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.11%
LMR PARTNERS Ltd	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.1%
MAGNETAR CAPITAL PARTNERS LP	SCHEDULE 13G	2026-02-17	2025-12-31	1,500,000	5.11%
Jose Bengochea	SCHEDULE 13D	2026-01-16	2025-12-18	6,120,000	21%
IRHO SPAC SPONSOR LLC	SCHEDULE 13D	2026-01-16	2025-12-18	6,120,000	21%
William Caragol	SCHEDULE 13D	2026-01-16	2025-12-18	6,120,000	21%
Linden GP LLC	SCHEDULE 13G	2025-12-23	2025-12-18	1,436,406	6.1%
Siu Min Wong	SCHEDULE 13G	2025-12-23	2025-12-18	1,500,000	6.4%
Linden Capital L.P.	SCHEDULE 13G	2025-12-23	2025-12-18	1,436,406	6.1%
Linden Advisors LP	SCHEDULE 13G	2025-12-23	2025-12-18	1,500,000	6.4%

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.