Iron Horse Acquisition II Corp.: 5%+ holders

As of November 6, 2026, 5 holders' latest Schedule 13D or 13G filings report owning 5% or more of Iron Horse Acquisition II Corp. The largest reported stake is Irho Spac Sponsor LLC's, at 21%. 7 filings are on record since December 19, 2025 (Schedule 13D, January 16, 2026).

LMR Partners LLP also filed stake reports on 44 other companies ↓

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Key facts

• Filed 2026-05-11 · Holder: MMCAP International Inc. SPC · Percent: 5.1% · SCHEDULE 13G/A
• Filed 2026-02-17 · Holder: LMR Partners LLP · Percent: 5.1% · SCHEDULE 13G
• Filed 2026-02-17 · Holder: Magnetar Financial LLC · Percent: 5.11% · SCHEDULE 13G
• Filed 2026-02-13 · Holder: MMCAP International Inc. SPC · Percent: 5.7% · SCHEDULE 13G/A
• Filed 2026-01-16 · Holder: Irho Spac Sponsor LLC · Percent: 21% · SCHEDULE 13D

Iron Horse Acquisition II Corp. has 7 Schedule 13D or 13G filings on record since 2025-12-19. 5 holders' latest filing reports 5% or more of ordinary shares, par value $0.0001. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on Iron Horse Acquisition II Corp. and the records around it.

Iron Horse Acquisition II Corp. elsewhere on the record

• Who owns it

Companies that share a holder

• LMR Partners LLP also filed stake reports on 44 other companies: BuzzFeed Inc (Aug 2026), Cartesian Growth Corp IV (Aug 2026), Collective Acquisition Corp. II (Aug 2026)
• MMCAP International Inc. SPC also filed stake reports on 52 other companies: BHAV Acquisition Corp II (Nov 2026), Haymaker Acquisition Corp V (Sep 2026), Thunder Bridge Capital Partners V, Ltd. (Aug 2026)
• Linden Capital L.P. also filed stake reports on 73 other companies: Southport Acquisition Corp. II (Oct 2026), NewHold Investment Corp IV (Sep 2026), Haymaker Acquisition Corp V (Sep 2026)

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Purpose of Transaction (Item 4)

Irho Spac Sponsor LLC

Founder Shares In connection with the organization of the Issuer, in September 2025, the Sponsor paid $32,000 to cover certain of the Issuer's initial public offering costs in exchange for 5,750,000 ordinary shares, (the "Founder Shares"), for approximately $0.004 per share. On December 18, 2025, the underwriter to the public offering exercised its over-allotment option ( "OA Option") in connection with the Issuer's initial public offering ("IPO") which was declared effective on December 16, 2025. See Issuer's registration statement on Form S-1 (File No. 333-284331, the "Registration Statement"), under the heading "Certain Transactions." Public Units On December 18, 2025, the Company closed its initial public offering of 23,000,000 units, at a price of $10.00 per unit (the "Public Units"), for an aggregate purchase price of $230,000,000 with the exercise of the OA Option in connection with the Issuer's IPO for an aggregate of $230,000,000. Each Public Unit consists of one ordinary share and one right (each, a "right"). Each right entitles the holder thereof to receive one-tenth (1/10) of a share upon the consummation of an initial business combination (as described more fully in the Registration Statement). Private Placement Units On December 18, 2025, simultaneously with the closing of the Issuer's IPO, the Sponsor acquired 370,000 private placement units and Cantor acquired 200,000 private placement units ("Private Placement Units" and, together with the Public Units, …The first part of Item 4 of the SCHEDULE 13D filed 2026-01-16; the filing has the rest

Timeline

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Questions about who owns Iron Horse Acquisition II Corp.

Who owns Iron Horse Acquisition II Corp.?

On this page, 5 holders' latest ownership filings report 5% or more of Iron Horse Acquisition II Corp.: Irho Spac Sponsor LLC (21%, Schedule 13D, filed 2026-01-16), Linden Advisors LP (6.4%, Schedule 13G, filed 2025-12-23), Magnetar Financial LLC (5.11%, Schedule 13G, filed 2026-02-17), MMCAP International Inc. SPC (5.1%, Schedule 13G/A, filed 2026-05-11) and LMR Partners LLP (5.1%, Schedule 13G, filed 2026-02-17).

Who are the largest shareholders of Iron Horse Acquisition II Corp.?

By the share each holder's latest filing reports, the largest holders of Iron Horse Acquisition II Corp. on this page are Irho Spac Sponsor LLC (21%), Linden Advisors LP (6.4%) and Magnetar Financial LLC (5.11%).

When did Irho Spac Sponsor LLC buy into Iron Horse Acquisition II Corp.?

The filings give report dates, not purchase dates. The earliest filing from Irho Spac Sponsor LLC on this page is the Schedule 13D, filed 2026-01-16, reporting 21%.

Is this an audit or a full list?

Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.

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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.

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