Polar Asset Management reports 5% stake in Oceanhawk

Polar Asset Management Partners Inc., an investment advisor based in Ontario, Canada, reported beneficial ownership of Class A Ordinary Shares of Oceanhawk Acquisition Corp..

Rhea-AI Filing Summary

Polar Asset Management Partners Inc., an investment advisor based in Ontario, Canada, reported beneficial ownership of Class A Ordinary Shares of Oceanhawk Acquisition Corp..

The firm beneficially owns 950,000 Class A Ordinary Shares, representing 5.0% of the class. Polar has sole voting and sole dispositive power over all 950,000 shares and no shared voting or dispositive power.

Key Figures

Shares beneficially owned: 950,000 shares Percent of class: 5.0% Sole voting power: 950,000 shares +4 more

7 metrics

Shares beneficially owned 950,000 shares Class A Ordinary Shares beneficially owned by Polar Asset Management Partners Inc.

Percent of class 5.0% Percentage of Oceanhawk Acquisition Corp Class A Ordinary Shares owned by Polar

Sole voting power 950,000 shares Shares over which Polar has sole power to vote or direct the vote

Shared voting power 0 shares Shares over which Polar has shared power to vote or direct the vote

Sole dispositive power 950,000 shares Shares over which Polar has sole power to dispose or direct disposition

Shared dispositive power 0 shares Shares over which Polar has shared power to dispose or direct disposition

Par value per share $0.0001 Par value of Oceanhawk Acquisition Corp Class A Ordinary Shares

Key Terms

beneficially owned, sole voting power, sole dispositive power, Schedule 13G, +1 more

5 terms

beneficially owned financial

"Amount beneficially owned: 950000"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole power to vote or to direct the vote: 950000"

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 financial

"Sole power to dispose or to direct the disposition of: 950000"

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.

Schedule 13G regulatory

"This statement is filed by Polar Asset Management Partners Inc."

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Class A Ordinary Share financial

"Title of class of securities: Class A Ordinary Share, $0.0001 par value"

A Class A ordinary share is a type of common stock a company issues that carries a specific set of rights—most often particular voting power, dividend terms, or transfer rules—distinct from other share classes. For investors it matters because those rights affect control over company decisions, how income is paid out, and how easy shares are to buy or sell; think of it like a tiered ticket that gives different access and influence at the same event.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What percentage of Oceanhawk Acquisition Corp (OHAC) does Polar Asset Management Partners own?

Polar Asset Management Partners Inc. reports beneficial ownership of 5.0% of Oceanhawk Acquisition Corp’s Class A Ordinary Shares. This represents a significant reporting threshold under SEC rules for large shareholders.

How many Oceanhawk Acquisition Corp (OHAC) shares are beneficially owned by Polar?

Polar Asset Management Partners Inc. beneficially owns 950,000 Class A Ordinary Shares of Oceanhawk Acquisition Corp. Polar has sole voting and sole dispositive power over all 950,000 shares and no shared authority.

What type of securities of Oceanhawk Acquisition Corp (OHAC) does Polar hold?

Polar Asset Management Partners Inc. holds Class A Ordinary Shares of Oceanhawk Acquisition Corp, each with a par value of $0.0001. The holding totals 950,000 shares, representing 5.0% of this class.

Does Polar Asset Management Partners share voting control over its OHAC shares?

No. Polar Asset Management Partners Inc. reports sole voting power over 950,000 shares of Oceanhawk Acquisition Corp and 0 shares with shared voting power, indicating exclusive voting authority on this position.

Who signed the Schedule 13G filing for Oceanhawk Acquisition Corp (OHAC)?

The Schedule 13G was signed by Andrew Ma, Chief Compliance Officer of Polar Asset Management Partners Inc. His signature certifies the reported 950,000 shares and related 5.0% beneficial ownership information.

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Available on EDGAR 08/14/2026 - 09:55 PM Accepted by SEC EDGAR 08/14/2026 - 09:54 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 Share, $0.0001 par value

(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

Polar Asset Management Partners Inc.

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

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 950,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 950,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

950,000.00

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)

5.0 %

12

Type of Reporting Person (See Instructions)

IA

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 Polar Asset Management Partners Inc., a company incorporated under the laws of Ontario, Canada, which serves as the investment advisor to Polar Multi-Strategy Master Fund, a Cayman Islands exempted company ("PMSMF") with respect to the shares directly held by PMSMF.
(b)	Address or principal business office or, if none, residence: 16 York Street, Suite 2900, Toronto, Ontario, M5J 0E6
(c)	Citizenship: Canada
(d)	Title of class of securities: Class A Ordinary Share, $0.0001 par value
(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).
	The Reporting Person is an investment fund manager, portfolio manager, exempt market dealer and commodity trading manager registered with the Ontario Securities Commission.
Item 4.	Ownership
(a)	Amount beneficially owned: 950000
(b)	Percent of class: 5.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 950000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 950000
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	Not Applicable
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.

Polar Asset Management Partners Inc.

Signature:	Andrew Ma
Name/Title:	Chief Compliance Officer
Date:	08/14/2026