Mizuho Financial Group (OAKU) discloses 148,100 shares, 9.0% stake

Rhea-AI Filing Summary

Mizuho Financial Group, Inc. reported it beneficially owns 148,100 common shares of Oak Woods Acquisition Corporation, representing 9.0% of the class.

The filing states Mizuho Securities USA LLC directly holds the shares and that Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed indirect beneficial owners. The filing is signed by Takahiro Katsura.

Insights

Institutional Ownership Analyst

Large passive stake disclosed: 148,100 shares (9.0%).

The Schedule 13G shows Mizuho Financial Group, Inc. reports 148,100 shares beneficially owned, equating to 9.0% of Oak Woods Acquisition Corporation common stock. The ownership is held directly by Mizuho Securities USA LLC with related entities noted as indirect owners.

The filing is a passive disclosure under Schedule 13G classification; cash‑flow treatment and acquisition timing are not described in the excerpt. Subsequent filings would disclose material changes in holdings.

Key Figures

Filing type: Schedule 13G Shares beneficially owned: 148,100 shares Percent of class: 9.0% +2 more

5 metrics

Filing type Schedule 13G ownership disclosure

Shares beneficially owned 148,100 shares beneficial ownership reported by Mizuho Financial Group

Percent of class 9.0% percentage of Oak Woods common stock beneficially owned

CUSIP 67190B112 Oak Woods Acquisition Corporation common shares

Signature date 05/14/2026 date of signed Schedule 13G

Key Terms

Schedule 13G, Beneficially owned, Sole dispositive power, Parent Holding Company

4 terms

Schedule 13G regulatory

"Mizuho Financial Group, Inc. filed a Schedule 13G indicating passive ownership"

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.

Beneficially owned financial

"Amount beneficially owned: 148,100 (b) Percent of class: 9.0 %"

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 dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 148,100"

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.

Parent Holding Company regulatory

"Parent Holding Company Item 4. Ownership and Exhibit A references"

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Accepted by SEC EDGAR 05/14/2026 - 06:13 AM Learn about SEC filing dates

FAQ

What stake does Mizuho Financial Group hold in Oak Woods Acquisition (OAKU)?

Mizuho reports holding 148,100 shares, which equals 9.0% of the common stock. The Schedule 13G lists the shares as directly held by Mizuho Securities USA LLC, with related entities noted as indirect beneficial owners.

Who directly holds the Oak Woods shares for Mizuho Financial Group?

Mizuho Securities USA LLC directly holds the disclosed 148,100 shares. The filing notes Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed indirect beneficial owners through that wholly‑owned subsidiary.

Does the Schedule 13G indicate active trading or a passive stake?

The filing is submitted on Schedule 13G, indicating a passive disclosure of ownership rather than an active acquisition statement. No purchase timing, transaction details, or cash‑flow treatment are included in the excerpt.

Who signed the ownership disclosure for Mizuho Financial Group?

Takahiro Katsura, Managing Director, signed the Schedule 13G on behalf of Mizuho Financial Group, Inc. The signature block appears with a date of 05/14/2026 in the excerpt.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Oak Woods Acquisition Corporation

(Name of Issuer)

Common Shares

(Title of Class of Securities)

67190B112

(CUSIP Number)

03/31/2026

(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): 67190B112

1

Names of Reporting Persons

Mizuho Financial Group, 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

JAPAN

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 148,100.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 148,100.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

148,100.00

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)

9.0 %

12

Type of Reporting Person (See Instructions)

FI

Comment for Type of Reporting Person: Mizuho Financial Group, Inc., Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed to be indirect beneficial owners of said equity securities directly held by Mizuho Securities USA LLC which is their wholly-owned subsidiary.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Oak Woods Acquisition Corporation
(b)	Address of issuer's principal executive offices: 101 Roswell Drive Nepean Ontario, A6 K2J 0H5
Item 2.
(a)	Name of person filing: Mizuho Financial Group, Inc.
(b)	Address or principal business office or, if none, residence: 1-5-5, Otemachi, Chiyoda-ku, Tokyo, 100-8176, Japan
(c)	Citizenship: Japan
(d)	Title of class of securities: Common Shares
(e)	CUSIP Number(s): 67190B112
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).
	Parent Holding Company
Item 4.	Ownership
(a)	Amount beneficially owned: 148,100
(b)	Percent of class: 9.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 148,100
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 148,100
	(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.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit A
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. By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to Parent Holding Company is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

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.

Mizuho Financial Group, Inc.

Signature:	/s/ Takahiro Katsura
Name/Title:	Takahiro Katsura, Managing Director, Global Corporate Function Coordination Department
Date:	05/14/2026