As of November 10, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Cayson Acquisition Corp. The largest reported stake is Feis Equities LLC's, at 9.83%. 9 filings are on record since August 13, 2025 (Schedule 13G/A, February 2, 2026).
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Key facts
- · Reporting person: W. R. Berkley Corporation · Sole voting: 0 · Shared voting: 273,164 · Sole dispositive: 0 · Shared dispositive: 273,164 · SCHEDULE 13G/A, 2026-11-09
- · Reporting person: Wolverine Asset Management, LLC · Sole voting: 0 · Shared voting: 119,188 · Sole dispositive: 0 · Shared dispositive: 119,188 · SCHEDULE 13G/A, 2026-10-06
- · Reporting person: Polar Asset Management Partners Inc. · Sole voting: 275,000 · Shared voting: 0 · Sole dispositive: 275,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-05-15
- · Reporting person: Kerry Propper · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-05-15
- · Holder: W.R. Berkley Corporation · Percent: 9.4% · SCHEDULE 13G/A
Cayson Acquisition Corp has 9 Schedule 13D or 13G filings on record since 2025-08-13. 4 holders' latest filing reports 5% or more of 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 |
|---|---|---|---|---|
| Feis Equities LLC | 9.83% | 769,472 | SCHEDULE 13G/A, 2026-02-02 | 2025-12-31 |
| Mizuho Financial Group, Inc. | 9% | 704,500 | SCHEDULE 13G/A, 2025-08-13 | 2025-06-30 |
| W. R. Berkley Corporation | 7.1% | 273,164 | SCHEDULE 13G/A, 2026-11-09 | 2026-09-30 |
| Polar Asset Management Partners Inc. | 5.2% | 275,000 | SCHEDULE 13G, 2026-05-15 | 2026-03-31 |
| Wolverine Asset Management, LLC | 3.09% | 119,188 | SCHEDULE 13G/A, 2026-10-06 | 2026-09-30 |
| 0% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
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Keep reading
More on Cayson Acquisition Corp and the records around it.
Companies that share a holder
- Kerry Propper also filed stake reports on 5 other companies: Future Vision II Acquisition Corp. (May 2026), Rising Dragon Acquisition Corp. (May 2026), Black Hawk Acquisition Corporation (Nov 2025)
- 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)
- Polar Asset Management Partners Inc. also filed stake reports on 69 other companies: Aeon Acquisition I Corp. (Aug 2026), Bitcoin Depot Inc. (Aug 2026), ACP Holdings Acquisition Corp. (Aug 2026)
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What the Full Report on Cayson Acquisition Corp covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| W. R. Berkley Corporation | 0 | 273,164 | 0 | 273,164 | SCHEDULE 13G/A, 2026-11-09 |
| Berkley Insurance Company | 0 | 273,164 | 0 | 273,164 | SCHEDULE 13G/A, 2026-11-09 |
| Polar Asset Management Partners Inc. | 275,000 | 0 | 275,000 | 0 | SCHEDULE 13G, 2026-05-15 |
| Wolverine Asset Management, LLC | 0 | 119,188 | 0 | 119,188 | SCHEDULE 13G/A, 2026-10-06 |
| Wolverine Holdings, LLC | 0 | 119,188 | 0 | 119,188 | SCHEDULE 13G/A, 2026-10-06 |
| Christopher L. Gust | 0 | 119,188 | 0 | 119,188 | SCHEDULE 13G/A, 2026-10-06 |
| Robert R. Bellick | 0 | 119,188 | 0 | 119,188 | SCHEDULE 13G/A, 2026-10-06 |
| Kerry Propper | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-15 |
| Antonio Ruiz-Gimenez | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-05-15 |
The latest filing identifies Cayson Acquisition Corp by CUSIP G1993W109 and gives its principal executive office as 205 W 37th St, New York, NY 10018 (SCHEDULE 13G/A, 2026-11-09).
What the percentages are based on
WAM may be deemed the beneficial owner of 3.09 % of the Issuer's outstanding Ordinary Shares and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust may be deemed the beneficial owner of 3.09 % of the Issuer's outstanding Ordinary Shares.Wolverine Asset Management, LLC, SCHEDULE 13G/A, 2026-10-06
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Mizuho Financial Group, Inc. | 9% | SCHEDULE 13G/A |
| 2025-10-23 | Feis Equities LLC | 5.18% | SCHEDULE 13G |
| 2026-02-02 | Feis Equities LLC | 9.83% | SCHEDULE 13G/A |
| 2026-04-20 | Wolverine Asset Management, LLC | 5.21% | SCHEDULE 13G/A |
| 2026-05-07 | W.R. Berkley Corporation | 9.4% | SCHEDULE 13G/A |
| 2026-05-15 | Kerry Propper | 0% | SCHEDULE 13G/A |
| 2026-05-15 | Polar Asset Management Partners Inc. | 5.2% | SCHEDULE 13G |
| 2026-10-06 | Wolverine Asset Management, LLC | 3.09% | SCHEDULE 13G/A |
| 2026-11-09 | W. R. Berkley Corporation | 7.1% | SCHEDULE 13G/A |
Questions about who owns Cayson Acquisition Corp
Who owns Cayson Acquisition Corp?
On this page, 4 holders' latest ownership filings report 5% or more of Cayson Acquisition Corp: Feis Equities LLC (9.83%, Schedule 13G/A, filed 2026-02-02), Mizuho Financial Group, Inc. (9%, Schedule 13G/A, filed 2025-08-13), W. R. Berkley Corporation (7.1%, Schedule 13G/A, filed 2026-11-09) and Polar Asset Management Partners Inc. (5.2%, Schedule 13G, filed 2026-05-15).
Who are the largest shareholders of Cayson Acquisition Corp?
By the share each holder's latest filing reports, the largest holders of Cayson Acquisition Corp on this page are Feis Equities LLC (9.83%), Mizuho Financial Group, Inc. (9%) and W. R. Berkley Corporation (7.1%).
When did Feis Equities LLC buy into Cayson Acquisition Corp?
The filings give report dates, not purchase dates. The earliest filing from Feis Equities LLC on this page is the Schedule 13G, filed 2025-10-23, reporting 5.18%; its latest, Schedule 13G/A filed 2026-02-02, reports 9.83%.
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%); 9 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 Cayson Acquisition Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 20, 2024 | IPO filing, Form 424B4 | $10 a share | IPO filings | Source |
| September 13, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| August 28, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| August 8, 2024 | IPO filing, Form S-1/A | — | 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.