IRHO · Iron Horse Acquisition II Corp. · Holdings

$10.09

Market Cap

$295.84M

29.32M

Volume · Oct 28 17.34K Avg daily vol (3M) 91.28K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of IRHO: 13F, 13D and 13G, insiders and funds →

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 71

Total Value: $223,364,567

Total Shares: 40,307,489

Showing 1–100 of 115 holdings by value · page 1 of 2

Institutional Ownership Trend

4 quarters

Holder Concentration

Across 71 13F filers

Top Holder

6.9%

of institutional value

Top 5

32.5%

of institutional value

Top 10

50.6%

of institutional value

HHI

362

Broadly held

Who Holds IRHO

Last 4 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 71 filers, like-for-like change +11.6%; actively managed books +11.6%; index-like books -100.0%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	61.9%	37	+13.9%	6	2
Exempt adviser	4.3%	2	-29.8%	0	1
Adviser	3.0%	4	+17.8%	0	0
Bank	1.4%	4	+52.9%	1	0
Insurer	0.6%	1	-50.0%	0	0
Broker-dealer	0.0%	1	+13.1%	0	0
Benefit plan	1.0%	1	0.0%	0	0
Non-US	13.7%	6	+28.8%	0	0
Holding company	0.0%	1	new	1	0
Unknown	14.0%	14	+9.9%	0	0

Style	Share	Filers	Change	New	Exited
Index-like	0.0%	1	-100.0%	1	1
Systematic-like	7.6%	7	+21.9%	1	0
Concentrated	14.6%	11	+16.7%	0	0
Diversified active	77.8%	52	+9.8%	6	2
Not measured	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	1.8%	5	+67.0%	2	0
Medium turnover	54.8%	29	+8.8%	2	0
High turnover	40.0%	31	+13.1%	4	3
Unknown	3.4%	6	+19.6%	0	0
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	55.2%	34	+10.1%	2	2
Medium horizon	19.5%	6	+30.6%	2	0
Long horizon	11.3%	13	+39.8%	2	0
Unknown	14.0%	18	-15.1%	2	1
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	19.1%	20	+12.9%	2	1
$1B to $10B	49.3%	30	+10.1%	3	2
$10B to $100B	25.7%	13	+9.4%	1	0
$100B or more	5.9%	8	+32.1%	2	0
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	0.1%	1	0.0%	0	0
Pooled investment vehicles	56.1%	32	+14.8%	6	1
Registered funds and BDCs	2.1%	3	-41.8%	0	1
Other investment advisers	3.7%	1	+99.8%	0	0
Unknown	38.1%	34	+8.0%	2	1

Private funds	Share	Filers	Change	New	Exited
Hedge funds	55.8%	34	+10.7%	6	2
Private equity funds	5.1%	2	+7.8%	0	0
Other private funds	1.2%	1	0.0%	0	0
Private funds, type not stated	3.7%	1	0.0%	0	0
No private funds	0.4%	1	-14.3%	0	1
Unknown	33.8%	32	+16.0%	2	0

Location	Share	Filers	Change	New	Exited
United States	67.6%	53	+8.6%	8	2
Outside the US	32.4%	18	+18.4%	0	1

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Conviction and Crowding

55 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

0.000% of filers hold it in their top 10

Mar 31, 2026: 1

Holders above 5%

median weight 0.123%

Mar 31, 2026: 0

Crowding

53.3%

of shares outstanding, 98th percentile

Mar 31, 2026: 43.0%

Private-fund advisers

44.7%

of shares outstanding

Institutional ownership

66.7%

114.4% of the estimated free float above 100%: filers can report lent or client shares more than once

Top 10 holders

52.3%

of 13F shares, Herfindahl 0.039

Active holders

+29.5%

like-for-like share change of active filers

5% stakes on record

1 13D, 0 13G

How long holders have held it value-weighted 1.8 quarters

Under 1 year 100.0% 1 to 3 years 0.000% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost

$9.91

estimated per share

Mar 31, 2026: $9.87

Quarter-end price

$10.03

implied by 13F values

Estimated gain or loss

+1.2%

price against the estimated cost

Estimated at a loss

0.000%

of costed 13F value

Estimated cost covers 98.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies IRHO's active holders also own, quarter ended Jun 30, 2026

#	Company	Shared holders	Similarity
1	MESH Meshflow Acquisition Corp	14	0.624
2	JACS Jackson Acquisition Co II	13	0.619
3	MBVI M3-Brigade Acquisition VI Corp.	14	0.599
4	ITHA ITHAX Acquisition Corp III	12	0.586
5	LPBB Launch Two Acquisition Corp.	12	0.546
6	DMII Drugs Made In America Acquisition II Corp.	14	0.524
7	SZZL Sizzle Acquisition Corp. II	12	0.514
8	CEPV Cantor Equity Partners V, Inc.	12	0.504
9	CGCF Cartesian Growth Corp IV	9	0.491
10	ADAC American Drive Acquisition Co	9	0.491

Shareholder Targets

13F filers that own its peers but not IRHO, quarter ended Jun 30, 2026

Found through its holder-overlap peers: MESH, JACS, MBVI, ITHA, LPBB, DMII, SZZL, CEPV, CGCF, ADAC, NPAC, AXIN, HACQ, ALOV, SCII, LWAC, CRAN, MLAA, POLE, LPCV. 80 filers in all.

#	Filer	In peers	Of book	Largest peers
1	D. E. Shaw & Co., Inc. Unknown, Systematic-like	$140,881,120 17 held	0.090%	DMII, POLE, LPBB
2	ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active	$117,221,317 10 held	0.160%	CRAN, MLAA, ALOV
3	Verition Fund Management LLC Registered adviser, Diversified active	$75,571,989 16 held	0.580%	CRAN, MBVI, LPBB
4	Governors Lane LP Registered adviser, Diversified active	$55,519,404 11 held	5.49%	CEPV, CRAN, NPAC
5	Ghisallo Capital Management LLC Registered adviser, Diversified active	$48,643,525 13 held	1.16%	NPAC, DMII, ADAC
6	Crossingbridge Advisors, LLC Adviser, Diversified active	$43,104,798 10 held	8.14%	DMII, SZZL, POLE
7	Fort Baker Capital Management LP Registered adviser, Diversified active	$36,674,618 3 held	3.57%	CRAN, MLAA, AXIN
8	GOLDMAN SACHS GROUP INC Holding company, Index-like	$28,332,867 5 held	0.000%	LPBB, POLE, NPAC
9	PEAK6 LLC Broker-dealer, Diversified active	$26,894,553 6 held	0.660%	MBVI, HACQ, CGCF
10	Jain Global LLC Registered adviser, Systematic-like	$26,818,394 5 held	0.340%	MESH, CGCF, CEPV

Fund Ownership of IRHO by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 0.00% of shares outstanding.

Fund type	Of shares outstanding	Shares	Funds
Index funds	0.00%	0	0
Index ETFs	0.00%	0	0
Active ETFs	0.00%	0	0
Active funds	2.03%	596,507	2
Unclassified	0.00%	0	0
All registered funds	2.03%	596,507	2

How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 37 Exempt adviser 2 Adviser 4 Bank 4 Insurer 1 Broker-dealer 1 Benefit plan 1 Non-US 6 Holding company 1 Unknown 14

Showing 100 of 115

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

LMR Partners LLP IRHOU

$15,330,000

6.86%

1,500,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	1,500,000	$15,330,000	100.0%	Sole

MMCAP International Inc. SPC

$15,045,000

6.74%

1,500,000

Magnetar Financial LLC

$15,045,000

6.74%

1,500,000

Linden Advisors LP

$15,045,000

6.74%

1,500,000

AQR Arbitrage LLC

$11,232,276

5.03%

1,119,868

GLAZER CAPITAL, LLC

$9,110,610

4.08%

908,336

PICTON MAHONEY ASSET MANAGEMENT

$9,027,000

4.04%

900,000

Polar Asset Management Partners Inc.

$8,024,000

3.59%

800,000

Wealthspring Capital LLC

$7,387,195

3.31%

736,510

BNP PARIBAS ARBITRAGE, SA

$6,510,824

2.91%

649,135

Radcliffe Capital Management, L.P.

$6,090,035

2.73%

607,182

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND

$6,039,714

2.70%

602,165

First Trust Capital Management L.P.

$6,018,000

2.69%

600,000

TENOR CAPITAL MANAGEMENT Co., L.P.

$5,491,505

2.46%

547,508

HIGHBRIDGE CAPITAL MANAGEMENT LLC

$5,051,950

2.26%

503,684

HEIGHTS CAPITAL MANAGEMENT, INC

$4,714,100

2.11%

470,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	470,000	$4,714,100	100.0%	Other

MANGROVE PARTNERS IM, LLC

$4,513,500

2.02%

450,000

OMERS ADMINISTRATION Corp IRHOU

$4,088,000

1.83%

400,000

Context Capital Management, LLC

$4,012,000

1.80%

400,000

TIG Advisors, LLC

$4,012,000

1.80%

400,000

Hudson Bay Capital Management LP

$3,802,854

1.70%

379,148

Kryger Capital LLC

$3,791,861

1.70%

378,052

TWO SIGMA INVESTMENTS, LP

$3,635,875

1.63%

362,500

WHITEBOX ADVISORS LLC

$3,510,500

1.57%

350,000

MILLENNIUM MANAGEMENT LLC

$3,009,000

1.35%

300,000

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS

$3,009,000

1.35%

300,000

HGC Investment Management Inc.

$2,993,844

1.34%

298,489

Mint Tower Capital Management B.V.

$2,507,500

1.12%

250,000

Alberta Investment Management Corp

$2,507,500

1.12%

250,000

BERKLEY W R CORP

$2,485,935

1.11%

247,850

SONA ASSET MANAGEMENT (US) LLC

$2,448,713

1.10%

244,139

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SONA ASSET MANAGEMENT (UK) LLP	244,139	$2,448,713	100.0%	Other

JPMORGAN CHASE & CO

$2,194,654

0.98%

218,809

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities LLC	218,809	$2,194,654	100.0%	Defined

METEORA CAPITAL, LLC

$2,181,013

0.98%

217,449

Shaolin Capital Management LLC

$2,097,022

0.94%

209,075

BlueCrest Capital Management Ltd IRHOU

$1,793,750

0.80%

175,000

Clear Street Group Inc. IRHOU

$1,760,323

0.79%

172,243

Westchester Capital Management, LLC IRHOU

$1,530,000

0.68%

150,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WESTCHESTER CAPITAL PARTNERS, LLC	1,402	$14,300	0.9%	Sole
Virtus Investment Advisers, LLC	135,064	$1,377,652	90.0%	Other
Held directly	13,534	$138,046	9.0%	Sole

Periscope Capital Inc.

$1,504,500

0.67%

150,000

Yakira Capital Management, Inc.

$1,473,477

0.66%

146,907

TORONTO DOMINION BANK

$1,314,501

0.59%

131,057

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	131,057	$1,314,501	100.0%	Defined

WOLVERINE ASSET MANAGEMENT LLC

$1,136,078

0.51%

113,268

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	113,268	$1,136,078	100.0%	Defined

L1 Global Manager Pty Ltd

$1,003,000

0.45%

100,000

O'Connor Alternative Investments LLC

$1,003,000

0.45%

100,000

MOORE CAPITAL MANAGEMENT, LP

$1,003,000

0.45%

100,000

Karpus Management, Inc.

$789,110

0.35%

78,675

SummitTX Capital, L.P.

$572,321

0.26%

57,061

Stoic Point Capital Management LLC

$551,650

0.25%

55,000

PRELUDE CAPITAL MANAGEMENT, LLC

$551,650

0.25%

55,000

RIVERNORTH CAPITAL MANAGEMENT, LLC

$500,497

0.22%

49,900

Kepos Capital LP

$401,200

0.18%

40,000

PenderFund Capital Management Ltd.

$258,774

0.12%

25,800

DELTEC ASSET MANAGEMENT LLC

$251,750

0.11%

25,000

FNY Investment Advisers, LLC

$251,750

0.11%

25,000

Magnetar Financial LLC IRHOR

$241,350

0.11%

1,500,000

MMCAP International Inc. SPC IRHOR

$241,200

0.11%

1,500,000

Linden Advisors LP IRHOR

$240,600

0.11%

1,500,000

MIZUHO SECURITIES USA LLC

$210,369

0.09%

20,974

Ionic Capital Management LLC

$189,316

0.08%

18,875

Lineage Point Capital LP IRHOU

$171,810

0.08%

16,600

AQR Arbitrage LLC IRHOR

$159,711

0.07%

992,610

Virtu Financial LLC

$153,900

0.07%

15,344

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	15,344	$153,900	100.0%	Defined

UBS Group AG

$147,972

0.07%

14,753

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Europe SE	14,753	$147,972	100.0%	Defined

PICTON MAHONEY ASSET MANAGEMENT IRHOR

$144,810

0.06%

900,000

Polar Asset Management Partners Inc. IRHOR

$128,640

0.06%

800,000

CSS LLC/IL IRHOR

$118,686

0.05%

73,810

METEORA CAPITAL, LLC IRHOR

$111,996

0.05%

696,490

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$110,330

0.05%

11,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	11,000	$110,330	100.0%	Other

Radcliffe Capital Management, L.P. IRHOR

$96,995

0.04%

604,519

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND IRHOR

$96,888

0.04%

602,165

TENOR CAPITAL MANAGEMENT Co., L.P. IRHOR

$88,039

0.04%

547,508

Clear Street Group Inc.

$87,662

0.04%

8,740

BNP PARIBAS ARBITRAGE, SA IRHOR

$84,223

0.04%

526,392

HGC Investment Management Inc. IRHOR

$84,177

0.04%

523,489

TIG Advisors, LLC IRHOR

$64,320

0.03%

400,000

Harraden Circle Investments, LLC IRHOR

$62,616

0.03%

389,400

Hudson Bay Capital Management LP IRHOR

$61,005

0.03%

379,148

WHITEBOX ADVISORS LLC IRHOR

$56,280

0.03%

350,000

Kryger Capital LLC IRHOR

$55,316

0.02%

344,005

HEIGHTS CAPITAL MANAGEMENT, INC IRHOR

$51,060

0.02%

317,338

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	317,338	$51,060	100.0%	Other

MANGROVE PARTNERS IM, LLC IRHOR

$48,399

0.02%

300,987

MILLENNIUM MANAGEMENT LLC IRHOR

$48,240

0.02%

300,000

Shaolin Capital Management LLC IRHOR

$40,918

0.02%

254,466

Alberta Investment Management Corp IRHOR

$40,225

0.02%

250,000

SONA ASSET MANAGEMENT (US) LLC IRHOR

$39,257

0.02%

244,139

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SONA ASSET MANAGEMENT (UK) LLP	244,139	$39,256	100.0%	Other

Sculptor Capital LP IRHOR

$39,089

0.02%

243,088

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sculptor Capital II LP joint	243,088	$39,089	100.0%	Sole

ARISTEIA CAPITAL, L.L.C. IRHOR

$32,192

0.01%

200,200

TORONTO DOMINION BANK IRHOR

$30,588

0.01%

189,989

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	189,989	$30,588	100.0%	Defined

BOOTHBAY FUND MANAGEMENT, LLC IRHOR

$27,738

0.01%

172,498

Yakira Capital Management, Inc. IRHOR

$23,623

0.01%

146,907

Ionic Capital Management LLC IRHOR

$20,153

0.01%

125,327

MOORE CAPITAL MANAGEMENT, LP IRHOR

$16,080

0.01%

100,000

O'Connor Alternative Investments LLC IRHOR

$16,040

0.01%

100,000

Periscope Capital Inc. IRHOR

$14,150

0.01%

88,000

SummitTX Capital, L.P. IRHOR

$9,181

0.00%

57,061

Stoic Point Capital Management LLC IRHOR

$8,844

0.00%

55,000

PRELUDE CAPITAL MANAGEMENT, LLC IRHOR

$8,844

0.00%

55,000

RIVERNORTH CAPITAL MANAGEMENT, LLC IRHOR

$8,530

0.00%

50,000

Clear Street Group Inc. IRHOR

$6,271

0.00%

39,000

ExodusPoint Capital Management, LP IRHOR

$5,890

0.00%

36,628

Schonfeld Strategic Advisors LLC IRHOR

$3,601

0.00%

22,399

Showing the top 100 of 115 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 2051985 CUSIP 46283H103 13F (30d) 2 filings 2 filers Visit website Investor relations