Highbridge Capital Management (OHAC) discloses 7.9% ownership of Oceanhawk Class A shares

Rhea-AI Filing Summary

Highbridge Capital Management, LLC, as investment adviser to certain funds and accounts, reports beneficial ownership of 1,500,000 Class A Ordinary Shares of Oceanhawk Acquisition Corp. This represents 7.9% of the Class A Ordinary Shares outstanding, based on 18,930,000 shares following the issuer’s offering and related transactions.

Highbridge reports sole voting and dispositive power over these 1,500,000 shares, with no shared voting or dispositive power. The Highbridge Funds, including Highbridge Tactical Credit Master Fund, L.P., have the right to receive dividends and sale proceeds associated with these shares.

Key Figures

Shares beneficially owned: 1,500,000 Class A Ordinary Shares Ownership percentage: 7.9% Shares outstanding baseline: 18,930,000 Class A Ordinary Shares +2 more

5 metrics

Shares beneficially owned 1,500,000 Class A Ordinary Shares Beneficially owned by Highbridge Capital Management, LLC and related funds

Ownership percentage 7.9% Percentage of Oceanhawk Class A Ordinary Shares beneficially owned by Highbridge

Shares outstanding baseline 18,930,000 Class A Ordinary Shares Aggregate shares outstanding used to calculate Highbridge’s 7.9% stake

Sole voting power 1,500,000 shares Shares over which Highbridge has sole power to vote or direct the vote

Sole dispositive power 1,500,000 shares Shares over which Highbridge has sole power to dispose or direct disposition

Key Terms

beneficial owner, sole voting power, sole dispositive power, percent of class, +1 more

5 terms

beneficial owner regulatory

"beneficial owner of the securities reported herein"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

sole voting power regulatory

"Sole Voting Power 1,500,000.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power regulatory

"Sole Dispositive Power 1,500,000.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

percent of class financial

"Percent of class: 7.9%"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

investment adviser financial

"the investment adviser to certain funds and accounts"

An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.

FAQ

What percentage of Oceanhawk Acquisition Corp (OHAC) does Highbridge Capital Management own?

Highbridge Capital Management reports beneficial ownership of 7.9% of Oceanhawk Acquisition Corp’s Class A Ordinary Shares, representing 1,500,000 shares out of an aggregate 18,930,000 Class A Ordinary Shares outstanding after the company’s offering and related transactions.

How many Oceanhawk (OHAC) shares does Highbridge Capital Management control voting for?

Highbridge Capital Management has sole voting power over 1,500,000 Class A Ordinary Shares of Oceanhawk Acquisition Corp and no shared voting power, giving it individual authority to vote or direct the vote for those reported shares.

What is the total number of Oceanhawk (OHAC) Class A shares used to calculate Highbridge’s 7.9% stake?

The reported 7.9% ownership is calculated using an aggregate of 18,930,000 Class A Ordinary Shares, as described in Oceanhawk’s prospectus and current report, reflecting completion of the offering, private placement, and full exercise of the underwriters’ over-allotment option.

Who ultimately receives dividends and sale proceeds from Highbridge’s OHAC shares?

The Highbridge Funds, advised by Highbridge Capital Management, have the right to receive or direct the receipt of dividends and sale proceeds from the reported Class A Ordinary Shares, including Highbridge Tactical Credit Master Fund, L.P. for more than 5% of the outstanding shares.

Does Highbridge claim to be the beneficial owner of OHAC shares for all legal purposes?

Highbridge states that filing this Schedule 13G should not be construed as an admission that it or any referenced persons are beneficial owners of the securities for purposes of Section 13 of the Exchange Act, limiting the implication of ownership beyond what is reported.

Where is Highbridge Capital Management, LLC located according to the OHAC Schedule 13G?

Highbridge Capital Management’s business office is listed at 390 Madison Avenue, 28th Floor, New York, NY 10017, while Oceanhawk Acquisition Corp’s principal executive offices are at 515 Madison Avenue, 8th Floor, New York, NY 10022.

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Available on EDGAR 08/14/2026 - 12:34 PM Accepted by SEC EDGAR 08/14/2026 - 12:33 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Oceanhawk Acquisition Corp.

(Name of Issuer)

Class A Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G6722R107

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G6722R107

1

Names of Reporting Persons

Highbridge Capital Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,500,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,500,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,500,000.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.9 %

12

Type of Reporting Person (See Instructions)

IA, OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Oceanhawk Acquisition Corp.
(b)	Address of issuer's principal executive offices: 515 Madison Avenue, 8th Floor, New York, NY 10022
Item 2.
(a)	Name of person filing: This statement is filed by Highbridge Capital Management, LLC ("Highbridge" or the "Reporting Person"), a Delaware limited liability company and the investment adviser to certain funds and accounts (the "Highbridge Funds"), with respect to the Class A ordinary shares, par value $0.0001 per share ("Class A Ordinary Shares"), of Oceanhawk Acquisition Corp., a Cayman Islands exempted company (the "Issuer"), directly held by the Highbridge Funds; The filing of this statement should not be construed as an admission that any of the foregoing persons or the Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the securities reported herein.
(b)	Address or principal business office or, if none, residence: The address of the business office of the Reporting Person is 390 Madison Avenue, 28th Floor, New York, NY 10017.
(c)	Citizenship: Highbridge is a Delaware limited liability company.
(d)	Title of class of securities: Class A Ordinary Shares, par value $0.0001 per share
(e)	CUSIP Number(s): G6722R107
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 18,930,000 Class A Ordinary Shares, as reported in the Issuer's Prospectus filed pursuant to Rule 424(b)(4) with the Securities and Exchange Commission on May 22, 2026, and in the Issuer's Current Report on Form 8-K, filed with the Securities and Exchange Commission on June 4, 2026, after giving effect to the completion of the offering, the consummation of the simultaneous private placement and the full exercise of the underwriters' over-allotment option, all as described therein.
(b)	Percent of class: 7.9%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. See Item 2(a). The Highbridge Funds have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Class A Ordinary Shares reported herein. Highbridge Tactical Credit Master Fund, L.P., a Highbridge Fund, has the right to receive or the power to direct the receipt of dividends or the proceeds from the sale of more than 5% of the outstanding Class A Ordinary Shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Highbridge Capital Management, LLC

Signature:	/s/ Kirk Rule
Name/Title:	By: Kirk Rule, Executive Director
Date:	08/14/2026