As of November 6, 2026, 5 holders' latest Schedule 13D or 13G filings report owning 5% or more of Ribbon Acquisition Corp. The largest reported stake is W. R. Berkley Corporation's, at 7.9%. 11 filings are on record since August 13, 2025 (Schedule 13G/A, May 8, 2026).
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Key facts
- · Reporting person: Wolverine Asset Management, LLC · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-10-05
- · Holder: Westchester Capital Management, LLC · Percent: 7.77% · SCHEDULE 13G
- · Holder: Polar Asset Management Partners Inc. · Percent: 2.1% · SCHEDULE 13G/A
- · Holder: Hudson Bay Capital Management LP · Percent: 5.22% · SCHEDULE 13G
- · Holder: W. R. Berkley Corporation · Percent: 7.9% · SCHEDULE 13G/A
Ribbon Acquisition Corp. has 11 Schedule 13D or 13G filings on record since 2025-08-13. 5 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 |
|---|---|---|---|---|
| W. R. Berkley Corporation | 7.9% | 297,589 | SCHEDULE 13G/A, 2026-05-08 | 2026-03-31 |
| Westchester Capital Management, LLC | 7.77% | 372,417 | SCHEDULE 13G, 2026-05-15 | 2026-03-31 |
| Rivernorth Capital Management, LLC | 7.66% | 400,000 | SCHEDULE 13G, 2026-02-17 | 2025-12-31 |
| Feis Equities LLC | 5.29% | 266,293 | SCHEDULE 13G, 2026-02-11 | 2026-02-11 |
| Hudson Bay Capital Management LP | 5.22% | 250,000 | SCHEDULE 13G, 2026-05-12 | 2026-03-31 |
| Polar Asset Management Partners Inc. | 2.1% | 100,000 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Mizuho Financial Group, Inc. | 0.2% | 12,398 | SCHEDULE 13G/A, 2026-02-12 | 2025-12-31 |
| Wolverine Asset Management, LLC | 0% | 0 | SCHEDULE 13G/A, 2026-10-05 | 2026-09-11 |
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Keep reading
More on Ribbon Acquisition Corp. and the records around it.
Companies that share a holder
- RIVERNORTH CAPITAL MANAGEMENT, LLC also filed stake reports on 23 other companies: FG Merger II Corp. (Oct 2026), YHN Acquisition I Ltd (Oct 2026), BLACKROCK MUNIYIELD QUALITY FUND III, INC. (Aug 2026)
- Westchester Capital Management, LLC also filed stake reports on 31 other companies: Lakeshore Acquisition III Corp. (Aug 2026), Sizzle Acquisition Corp. II (Aug 2026), Tavia Acquisition Corp. (Aug 2026)
- Hudson Bay Capital Management LP also filed stake reports on 34 other companies: Newbridge Acquisition Ltd (Nov 2026), Eos Energy Enterprises, Inc. (Nov 2026), FG Imperii Acquisition Corp. (Nov 2026)
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What the Full Report on Ribbon Acquisition Corp. covers
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Warning Bells
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Wolverine Asset Management, LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-05 |
| Wolverine Holdings, LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-05 |
| Christopher L. Gust | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-05 |
| Robert R. Bellick | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-05 |
The latest filing identifies Ribbon Acquisition Corp. by CUSIP G7552W109 and gives its principal executive office as Central Park Tower, LaTour Shinjuku,Room, 3001, 6-15-1 Nishi Shinjuku, Shinjuku-ku, Tokyo (SCHEDULE 13G/A, 2026-10-05).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Mizuho Financial Group, Inc. | 9% | SCHEDULE 13G/A |
| 2025-08-14 | Rivernorth Capital Management, LLC | 6.18% | SCHEDULE 13G |
| 2025-11-14 | Rivernorth Capital Management, LLC | 1.92% | SCHEDULE 13G/A |
| 2026-02-11 | Feis Equities LLC | 5.29% | SCHEDULE 13G |
| 2026-02-12 | Mizuho Financial Group, Inc. | 0.2% | SCHEDULE 13G/A |
| 2026-02-17 | Rivernorth Capital Management, LLC | 7.66% | SCHEDULE 13G |
| 2026-05-08 | W. R. Berkley Corporation | 7.9% | SCHEDULE 13G/A |
| 2026-05-12 | Hudson Bay Capital Management LP | 5.22% | SCHEDULE 13G |
| 2026-05-15 | Westchester Capital Management, LLC | 7.77% | SCHEDULE 13G |
| 2026-05-15 | Polar Asset Management Partners Inc. | 2.1% | SCHEDULE 13G/A |
| 2026-10-05 | Wolverine Asset Management, LLC | 0% | SCHEDULE 13G/A |
Questions about who owns Ribbon Acquisition Corp.
Who owns Ribbon Acquisition Corp.?
On this page, 5 holders' latest ownership filings report 5% or more of Ribbon Acquisition Corp.: W. R. Berkley Corporation (7.9%, Schedule 13G/A, filed 2026-05-08), Westchester Capital Management, LLC (7.77%, Schedule 13G, filed 2026-05-15), Rivernorth Capital Management, LLC (7.66%, Schedule 13G, filed 2026-02-17), Feis Equities LLC (5.29%, Schedule 13G, filed 2026-02-11) and Hudson Bay Capital Management LP (5.22%, Schedule 13G, filed 2026-05-12).
Who are the largest shareholders of Ribbon Acquisition Corp.?
By the share each holder's latest filing reports, the largest holders of Ribbon Acquisition Corp. on this page are W. R. Berkley Corporation (7.9%), Westchester Capital Management, LLC (7.77%) and Rivernorth Capital Management, LLC (7.66%).
When did W. R. Berkley Corporation buy into Ribbon Acquisition Corp.?
The filings give report dates, not purchase dates. The earliest filing from W. R. Berkley Corporation on this page is the Schedule 13G/A, filed 2026-05-08, reporting 7.9%. That earliest filing is itself an amendment, which updates an earlier report.
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.
Also on the record for Ribbon Acquisition Corp.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| January 16, 2025 | IPO filing, Form 424B4 | — | IPO filings | Source |
| January 8, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| December 20, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| December 6, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| November 14, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| October 15, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| August 28, 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.