Mizuho Financial Group (OAKU) discloses 4.6% passive stake in Oak Woods

Rhea-AI Filing Summary

Mizuho Financial Group, Inc. filed an amended Schedule 13G reporting its beneficial ownership in Oak Woods Acquisition Corporation common shares. The firm reports beneficial ownership of 164,308 common shares, representing 4.6% of the class as of the event date, with sole voting and dispositive power over all reported shares.

The filing is made as a parent holding company, with the shares directly held by its wholly owned subsidiary Mizuho Securities USA LLC. Mizuho states the position is held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

Oak Woods Acquisition Corporation

(Name of Issuer)

Common Shares

(Title of Class of Securities)

67190B104

(CUSIP Number)

12/31/2025

(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)

SCHEDULE 13G

CUSIP No. 67190B104

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 164,308.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 164,308.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

164,308.00

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)

4.6 %

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 Rosewell Drive Nepean, Ontario, Canada K2J0H5
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 No.: 67190B104
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: 164,308
(b)	Percent of class: 4.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 164,308
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 164,308
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
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:	02/12/2026

FAQ

What ownership stake does Mizuho report in Oak Woods Acquisition Corporation (OAKU)?

Mizuho Financial Group reports beneficial ownership of 164,308 common shares of Oak Woods Acquisition Corporation, representing 4.6% of the outstanding class. Mizuho has sole voting and sole dispositive power over all of these reported shares.

Is Mizuho Financial Group’s stake in OAKU above or below 5 percent?

Mizuho’s reported ownership in OAKU is 4.6% of the class, which is below the 5 percent threshold. The filing confirms ownership of 5 percent or less of the class of common shares.

How are the OAKU shares held that Mizuho reports on this Schedule 13G/A?

The filing explains that the equity securities are directly held by Mizuho Securities USA LLC, a wholly owned subsidiary. Mizuho Financial Group, Mizuho Bank, and Mizuho Americas LLC may be deemed to be indirect beneficial owners of these shares.

Does Mizuho intend to influence control of Oak Woods Acquisition Corporation (OAKU)?

Mizuho certifies the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of Oak Woods Acquisition Corporation, nor in connection with any transaction having that purpose or effect.

What type of reporting person is Mizuho in this OAKU Schedule 13G/A?

Mizuho identifies itself as a parent holding company under the Schedule 13G classification. The filing notes that Mizuho’s foreign regulatory scheme is represented as substantially comparable to that applicable to functionally equivalent U.S. institutions.

Who signed the Schedule 13G/A filed for Mizuho regarding OAKU?

The Schedule 13G/A is signed by Takahiro Katsura, identified as Managing Director, Global Corporate Function Coordination Department. The signature section certifies that the information contained in the statement is true, complete, and correct to the best of his knowledge and belief.