JAB Acquisition Corp I: 5%+ holders

As of November 10, 2026, 7 holders' latest Schedule 13D or 13G filings report owning 5% or more of JAB Acquisition Corp I. The largest reported stake is JAB Acquisition Sponsor I, LLC's, at 36.4%. 11 filings are on record since June 12, 2026 (Schedule 13D, June 12, 2026).

Decagon Asset Management LLP also filed stake reports on 14 other companies ↓

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Key facts

• Filing 2026-11-09 · Reporting person: W. R. Berkley Corporation · Sole voting: 0 · Shared voting: 1,236,319 · Sole dispositive: 0 · Shared dispositive: 1,236,319 · SCHEDULE 13G, 2026-11-09
• Filing 2026-08-14 · Reporting person: Highbridge Capital Management, LLC · Sole voting: 1,638,750 · Shared voting: 0 · Sole dispositive: 1,638,750 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-14
• Filing 2026-08-14 · Reporting person: Aristeia Capital, L.L.C. · Sole voting: 900,000 · Shared voting: 0 · Sole dispositive: 900,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-14
• Filing 2026-08-14 · Reporting person: Sculptor Capital LP · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-14
• Filing 2026-08-13 · Reporting person: Mizuho Financial Group, Inc. · Sole voting: 1,011,661 · Shared voting: 0 · Sole dispositive: 1,011,661 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-13

JAB Acquisition Corp I has 11 Schedule 13D or 13G filings on record since 2026-06-12. 7 holders' latest filing reports 5% or more of class a ordinary shares, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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Companies that share a holder

• Decagon Asset Management LLP also filed stake reports on 14 other companies: Oaktree Acquisition Corp. III Life Sciences (Aug 2026), Alpex Acquisition Corp (Aug 2026), APEX Tech Acquisition Inc. (Aug 2026)
• Sculptor Capital LP also filed stake reports on 40 other companies: Helix Acquisition Corp. III (Oct 2026), Live Oak Acquisition Corp. VI (Oct 2026), Amanat Acquisition Corp (Aug 2026)
• Feis Equities LLC also filed stake reports on 44 other companies: SPACCircle Acquisition Corp. (Oct 2026), Aperture AC (Oct 2026), Pine Tree Acquisition Corp. (Oct 2026)

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Voting and dispositive power, as filed

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The latest filing identifies JAB Acquisition Corp I by CUSIP G50004103 and gives its principal executive office as 270 Sylvan Avenue, Suite 2230, Englewood Cliffs, NJ 07632 (SCHEDULE 13G, 2026-11-09).

What the percentages are based on

As of June 30, 2026, each of the Reporting Persons were deemed to be the beneficial owner constituting approximately 5.22% of the total number of shares outstanding (based upon the information provided by the Issuer in Form 8K filed on June 12, 2026, there were approximately 17,250,000 Shares outstanding).Magnetar Financial LLC, SCHEDULE 13G, 2026-08-13

3.02 - The percentage set forth in row 11 of the cover page for each Reporting Person is based on 18,345,000 Class A ordinary shares outstanding as of July 23, 2026, as reported by the Issuer in its 10-Q filing for the period ending March 31,2026, filed with the Securities and Exchange Commission on July 23, 2026.Feis Equities LLC, SCHEDULE 13G/A, 2026-08-10

Source of funds (Item 3)

The information set forth in Items 4 and 5 of this Schedule 13D is hereby incorporated by reference into this Item 3.JAB Acquisition Sponsor I, LLC, SCHEDULE 13D, 2026-06-12

Purpose of Transaction (Item 4)

JAB Acquisition Sponsor I, LLC

On March 19, 2026, the Reporting Person purchased, and the Issuer issued to such Reporting Person, an aggregate of 9,857,143 Class B ordinary shares for an aggregate purchase price of $25,000. The Reporting Person is deemed to have purchased Class B ordinary shares for $0.002 per share. The Class B ordinary shares will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination, or at any time prior thereto at the option of the holder thereof, on a one-for-one basis, subject to customary adjustments, as described in the Issuer's Registration Statement on Form S-1 (File No. 333-296035), as amended (the "Registration Statement.") On June 11, 2026, the Issuer completed its initial public offering ("IPO") of 17,250,000 units at $10.00 per unit, which includes the exercise in full by the underwriters of their option to purchase an additional 2,250,00 units, with each unit consisting of once Class A ordinary share, one redeemable warrant to purchase one Class A ordinary share at a price of $11.50 per share, subject to certain adjustments, and one right to receive one-fourth (1/4) of one Class A ordinary share upon consummation of the Company's initial business combination. An additional 1,000,000 Class A Ordinary Shares were issued to D. Boral Capital LLC as representative of the underwriters. On June 11, 2026, in connection with the Issuer's IPO, the Reporting Person purchased from …The first part of Item 4 of the SCHEDULE 13D filed 2026-06-12; the filing has the rest

Timeline

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Questions about who owns JAB Acquisition Corp I

Who owns JAB Acquisition Corp I?

On this page, 7 holders' latest ownership filings report 5% or more of JAB Acquisition Corp I: JAB Acquisition Sponsor I, LLC (36.4%, Schedule 13D, filed 2026-06-12), Highbridge Capital Management, LLC (8.8%, Schedule 13G, filed 2026-08-14), Mizuho Financial Group, Inc. (6.6%, Schedule 13G, filed 2026-08-13), W. R. Berkley Corporation (6.6%, Schedule 13G, filed 2026-11-09) and Decagon Asset Management LLP (5.26%, Schedule 13G, filed 2026-08-13); 2 more are listed above.

Who are the largest shareholders of JAB Acquisition Corp I?

By the share each holder's latest filing reports, the largest holders of JAB Acquisition Corp I on this page are JAB Acquisition Sponsor I, LLC (36.4%), Highbridge Capital Management, LLC (8.8%) and Mizuho Financial Group, Inc. (6.6%).

When did JAB Acquisition Sponsor I, LLC buy into JAB Acquisition Corp I?

The filings give report dates, not purchase dates. The earliest filing from JAB Acquisition Sponsor I, LLC on this page is the Schedule 13D, filed 2026-06-12, reporting 36.4%.

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%); 11 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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