As of November 10, 2026, 6 holders' latest Schedule 13D or 13G filings report owning 5% or more of Copley Acquisition Corp. The largest reported stake is Copley Acquisition Sponsors, LLC's, at 26.57%. 10 filings are on record since July 31, 2025 (Schedule 13G, February 17, 2026).
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Key facts
- · Reporting person: W. R. Berkley Corporation · Sole voting: 0 · Shared voting: 1,772,113 · Sole dispositive: 0 · Shared dispositive: 1,772,113 · SCHEDULE 13G/A, 2026-11-09
- · Reporting person: Highbridge Capital Management, LLC · Sole voting: 1,023,151 · Shared voting: 0 · Sole dispositive: 1,023,151 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-14
- · Reporting person: Mizuho Financial Group, Inc. · Sole voting: 1,020,000 · Shared voting: 0 · Sole dispositive: 1,020,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-13
- · Holder: W.R. Berkley Corporation · Percent: 5.7% · SCHEDULE 13G/A
- · Reporting person: Copley Acquisition Sponsors, LLC · Sole voting: 6,305,893 · Shared voting: 0 · Sole dispositive: 6,305,893 · Shared dispositive: 0 · SCHEDULE 13G, 2026-02-17
Copley Acquisition Corp has 10 Schedule 13D or 13G filings on record since 2025-07-31. 6 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
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Copley Acquisition Sponsors, LLC | 26.57% | 6,305,893 | SCHEDULE 13G, 2026-02-17 | 2025-06-30 |
| W. R. Berkley Corporation | 9.9% | 1,772,113 | SCHEDULE 13G/A, 2026-11-09 | 2026-09-30 |
| Aristeia Capital, L.L.C. | 6.23% | 1,085,430 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| Karpus Management, Inc. | 5.73% | 1,359,828 | SCHEDULE 13G, 2025-11-14 | 2025-09-30 |
| Mizuho Financial Group, Inc. | 5.7% | 1,020,000 | SCHEDULE 13G, 2026-08-13 | 2026-06-30 |
| Highbridge Capital Management, LLC | 5.7% | 1,023,151 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| Bank of Montreal | 0% | 0 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
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More on Copley Acquisition Corp and the records around it.
Companies that share a holder
- Bank of Montreal also filed stake reports on 49 other companies: Akari Therapeutics Plc (Aug 2026), Alarm.com Holdings, Inc. (Aug 2026), North American Construction Group Ltd. (Aug 2026)
- Aristeia Capital, L.L.C. also filed stake reports on 54 other companies: Apogee Acquisition Corp (Aug 2026), ARC Group Acquisition I Corp (Aug 2026), ClearThink 1 Acquisition Corp. (Aug 2026)
- Mizuho Financial Group, Inc. also filed stake reports on 74 other companies: Aeon Acquisition I Corp. (Aug 2026), Alpex Acquisition Corp (Aug 2026), Aperture AC (Aug 2026)
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What the Full Report on Copley Acquisition Corp covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Copley Acquisition Sponsors, LLC | 6,305,893 | 0 | 6,305,893 | 0 | SCHEDULE 13G, 2026-02-17 |
| Tok Li | 0 | 6,305,893 | 0 | 6,305,893 | SCHEDULE 13G, 2026-02-17 |
| W. R. Berkley Corporation | 0 | 1,772,113 | 0 | 1,772,113 | SCHEDULE 13G/A, 2026-11-09 |
| Berkley Insurance Company | 0 | 1,772,113 | 0 | 1,772,113 | SCHEDULE 13G/A, 2026-11-09 |
| Mizuho Financial Group, Inc. | 1,020,000 | 0 | 1,020,000 | 0 | SCHEDULE 13G, 2026-08-13 |
| Highbridge Capital Management, LLC | 1,023,151 | 0 | 1,023,151 | 0 | SCHEDULE 13G, 2026-08-14 |
The latest filing identifies Copley Acquisition Corp by CUSIP G24243100 and gives its principal executive office as Suite 4005-4006,40/F,One Exchange Square, 8 Connaught Place, Central, Hong Kong (SCHEDULE 13G/A, 2026-11-09).
What the percentages are based on
The 6,305,893 ordinary shares of the Issuer owned by the Reporting Persons constitute 26.57% of the aggregate total number of issued and outstanding ordinary shares of the Issuer, which include 17,978,393 Class A Ordinary Shares issued and outstanding and 5,750,000 Class B Ordinary Shares outstanding as of November 12, 2025.Copley Acquisition Sponsors, LLC, SCHEDULE 13G, 2026-02-17
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-31 | Bank of Montreal | 7.09% | SCHEDULE 13G |
| 2025-08-08 | W. R. Berkley Corporation | 5.2% | SCHEDULE 13G |
| 2025-08-14 | Aristeia Capital, L.L.C. | 6.23% | SCHEDULE 13G |
| 2025-11-14 | Karpus Management, Inc. | 5.73% | SCHEDULE 13G |
| 2026-02-13 | Bank of Montreal | 0% | SCHEDULE 13G/A |
| 2026-02-17 | Copley Acquisition Sponsors, LLC | 26.57% | SCHEDULE 13G |
| 2026-05-07 | W.R. Berkley Corporation | 5.7% | SCHEDULE 13G/A |
| 2026-08-13 | Mizuho Financial Group, Inc. | 5.7% | SCHEDULE 13G |
| 2026-08-14 | Highbridge Capital Management, LLC | 5.7% | SCHEDULE 13G |
| 2026-11-09 | W. R. Berkley Corporation | 9.9% | SCHEDULE 13G/A |
Questions about who owns Copley Acquisition Corp
Who owns Copley Acquisition Corp?
On this page, 6 holders' latest ownership filings report 5% or more of Copley Acquisition Corp: Copley Acquisition Sponsors, LLC (26.57%, Schedule 13G, filed 2026-02-17), W. R. Berkley Corporation (9.9%, Schedule 13G/A, filed 2026-11-09), Aristeia Capital, L.L.C. (6.23%, Schedule 13G, filed 2025-08-14), Karpus Management, Inc. (5.73%, Schedule 13G, filed 2025-11-14) and Mizuho Financial Group, Inc. (5.7%, Schedule 13G, filed 2026-08-13); 1 more is listed above.
Who are the largest shareholders of Copley Acquisition Corp?
By the share each holder's latest filing reports, the largest holders of Copley Acquisition Corp on this page are Copley Acquisition Sponsors, LLC (26.57%), W. R. Berkley Corporation (9.9%) and Aristeia Capital, L.L.C. (6.23%).
When did Copley Acquisition Sponsors, LLC buy into Copley Acquisition Corp?
The filings give report dates, not purchase dates. The earliest filing from Copley Acquisition Sponsors, LLC on this page is the Schedule 13G, filed 2026-02-17, reporting 26.57%.
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%); 10 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.
Also on the record for Copley Acquisition Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| May 1, 2025 | IPO filing, Form 424B4 | — | IPO filings | Source |
| April 23, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| April 14, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| April 1, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| February 18, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| February 3, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| December 20, 2024 | IPO filing, Form S-1 | — | IPO filings | Source |
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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.