As of November 6, 2026, 6 holders' latest Schedule 13D or 13G filings report owning 5% or more of Oceanhawk Acquisition Corp. The largest reported stake is Highbridge Capital Management, LLC's, at 7.9%. 8 filings are on record since May 29, 2026 (Schedule 13G, August 14, 2026).
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Key facts
- · Reporting person: Css LLC · Sole voting: 1,038,610 · Shared voting: 0 · Sole dispositive: 1,038,610 · Shared dispositive: 0 · SCHEDULE 13G, 2026-10-06
- · Reporting person: Highbridge Capital Management, LLC · Sole voting: 1,500,000 · Shared voting: 0 · Sole dispositive: 1,500,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-14
- · Reporting person: Polar Asset Management Partners Inc. · Sole voting: 950,000 · Shared voting: 0 · Sole dispositive: 950,000 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-14
- · Reporting person: Harraden Circle Investments, LLC · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: Magnetar Financial LLC · Sole voting: 0 · Shared voting: 986,320 · Sole dispositive: 0 · Shared dispositive: 986,320 · SCHEDULE 13G, 2026-08-13
Oceanhawk Acquisition Corp has 8 Schedule 13D or 13G filings on record since 2026-05-29. 6 holders' latest filing reports 5% or more of class a ordinary share, $0.0001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Highbridge Capital Management, LLC | 7.9% | 1,500,000 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| The Goldman Sachs Group, Inc. | 7.8% | 1,479,187 | SCHEDULE 13G, 2026-08-11 | 2026-06-30 |
| Adage Capital Management, L.P. | 5.68% | 1,075,000 | SCHEDULE 13G, 2026-08-12 | 2026-06-30 |
| Css LLC | 5.49% | 1,038,610 | SCHEDULE 13G, 2026-10-06 | 2026-06-09 |
| Magnetar Financial LLC | 5.21% | 986,320 | SCHEDULE 13G, 2026-08-13 | 2026-06-30 |
| Polar Asset Management Partners Inc. | 5% | 950,000 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| Harraden Circle Investments, LLC | 0% | 0 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
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More on Oceanhawk Acquisition Corp and the records around it.
Oceanhawk Acquisition Corp elsewhere on the record
- Leadership changes Aug 2026
Companies that share a holder
- CSS LLC/IL also filed stake reports on 9 other companies: RiverNorth Capital & Income Fund, Inc. (Nov 2026), Liberty Broadband Corporation (Nov 2026), Herzfeld Credit Income Fund, Inc (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)
- Highbridge Capital Management, LLC also filed stake reports on 83 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 Oceanhawk 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 |
|---|---|---|---|---|---|
| Highbridge Capital Management, LLC | 1,500,000 | 0 | 1,500,000 | 0 | SCHEDULE 13G, 2026-08-14 |
| The Goldman Sachs Group, Inc. | 0 | 1,479,187 | 0 | 1,479,187 | SCHEDULE 13G, 2026-08-11 |
| Goldman Sachs & Co. LLC | 0 | 1,479,187 | 0 | 1,479,187 | SCHEDULE 13G, 2026-08-11 |
| Adage Capital Management, L.P. | 0 | 1,075,000 | 0 | 1,075,000 | SCHEDULE 13G, 2026-08-12 |
| Robert Atchinson | 0 | 1,075,000 | 0 | 1,075,000 | SCHEDULE 13G, 2026-08-12 |
| Phillip Gross | 0 | 1,075,000 | 0 | 1,075,000 | SCHEDULE 13G, 2026-08-12 |
| Css LLC | 1,038,610 | 0 | 1,038,610 | 0 | SCHEDULE 13G, 2026-10-06 |
| Magnetar Financial LLC | 0 | 986,320 | 0 | 986,320 | SCHEDULE 13G, 2026-08-13 |
| Magnetar Capital Partners LP | 0 | 986,320 | 0 | 986,320 | SCHEDULE 13G, 2026-08-13 |
| Supernova Management LLC | 0 | 986,320 | 0 | 986,320 | SCHEDULE 13G, 2026-08-13 |
| David J. Snyderman | 0 | 986,320 | 0 | 986,320 | SCHEDULE 13G, 2026-08-13 |
| Polar Asset Management Partners Inc. | 950,000 | 0 | 950,000 | 0 | SCHEDULE 13G, 2026-08-14 |
| Harraden Circle Investments, LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-14 |
| Frederick V. Fortmiller, Jr. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-14 |
The latest filing identifies Oceanhawk Acquisition Corp by CUSIP G6722R107 and gives its principal executive office as 515 Madison Ave, 8th Floor, New York, NY 10022 (SCHEDULE 13G, 2026-10-06).
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 5.21% of the total number of shares outstanding (based upon the information provided by the Issuer in Form 8-K filed, there were approximately 18,930,000 Shares outstanding as of May 27, 2026).Magnetar Financial LLC, SCHEDULE 13G, 2026-08-13
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-05-29 | Harraden Circle Investments, LLC | 7.88% | SCHEDULE 13G |
| 2026-08-11 | The Goldman Sachs Group, Inc. | 7.8% | SCHEDULE 13G |
| 2026-08-12 | Adage Capital Management, L.P. | 5.68% | SCHEDULE 13G |
| 2026-08-13 | Magnetar Financial LLC | 5.21% | SCHEDULE 13G |
| 2026-08-14 | Highbridge Capital Management, LLC | 7.9% | SCHEDULE 13G |
| 2026-08-14 | Harraden Circle Investments, LLC | 0% | SCHEDULE 13G/A |
| 2026-08-14 | Polar Asset Management Partners Inc. | 5% | SCHEDULE 13G |
| 2026-10-06 | Css LLC | 5.49% | SCHEDULE 13G |
Questions about who owns Oceanhawk Acquisition Corp
Who owns Oceanhawk Acquisition Corp?
On this page, 6 holders' latest ownership filings report 5% or more of Oceanhawk Acquisition Corp: Highbridge Capital Management, LLC (7.9%, Schedule 13G, filed 2026-08-14), The Goldman Sachs Group, Inc. (7.8%, Schedule 13G, filed 2026-08-11), Adage Capital Management, L.P. (5.68%, Schedule 13G, filed 2026-08-12), Css LLC (5.49%, Schedule 13G, filed 2026-10-06) and Magnetar Financial LLC (5.21%, Schedule 13G, filed 2026-08-13); 1 more is listed above.
Who are the largest shareholders of Oceanhawk Acquisition Corp?
By the share each holder's latest filing reports, the largest holders of Oceanhawk Acquisition Corp on this page are Highbridge Capital Management, LLC (7.9%), The Goldman Sachs Group, Inc. (7.8%) and Adage Capital Management, L.P. (5.68%).
When did Highbridge Capital Management, LLC buy into Oceanhawk Acquisition Corp?
The filings give report dates, not purchase dates. The earliest filing from Highbridge Capital Management, LLC on this page is the Schedule 13G, filed 2026-08-14, reporting 7.9%.
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%); 8 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 Oceanhawk Acquisition Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 19, 2026 | Leadership change: Jimmy D. Ford appointed, Director | — | Leadership changes | Source |
| May 27, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
| May 22, 2026 | IPO filing, Form 424B4 | $10 a share | IPO filings | Source |
| May 19, 2026 | IPO filing, Form S-1/A | — | IPO filings | Source |
| March 23, 2026 | 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.