Mizuho (NYSE: RFAI) reports 8.8% ownership — 732,379 shares

Rhea-AI Filing Summary

Mizuho Financial Group reports 8.8% ownership of RF Acquisition Corp II common shares. The filing states Mizuho beneficially owns 732,379 shares of Common Shares (CUSIP G75389109) as reported for the period ending 03/31/2026. The filing lists sole voting and dispositive power over the same 732,379 shares and notes indirect ownership through related entities including Mizuho Securities USA LLC.

Insights

Corporate Governance Analyst

Mizuho holds a sizable passive stake (8.8%) reported on a Schedule 13G.

The filing shows 732,379 shares and attributes sole voting and dispositive power to Mizuho as of 03/31/2026. This Schedule 13G classification typically indicates a passive investor position rather than an intent to influence control.

Watch future filings for any change to Schedule 13D treatment or additional acquisitions that could signal an active intent; timing not specified in the excerpt.

Equity Markets Specialist

This disclosure updates market participants on institutional ownership concentration in RFAI.

The reported 8.8% stake may affect perceived shareholder composition and potential trading interest. The filing explicitly links holdings to Mizuho Securities USA LLC as a subsidiary.

Subsequent ownership updates or transactions would appear in later schedules; cash-flow treatment and transaction dates beyond the 03/31/2026 reporting date are not provided in the excerpt.

Key Figures

Beneficial ownership: 732,379 shares Percent of class: 8.8% Sole voting power: 732,379 shares +1 more

4 metrics

Beneficial ownership 732,379 shares Common Shares (CUSIP G75389109) as of <date>03/31/2026

Percent of class 8.8% Percent of class as reported in Schedule 13G

Sole voting power 732,379 shares Sole power to vote as reported in Item 4

Sole dispositive power 732,379 shares Sole power to dispose as reported in Item 4

Key Terms

Schedule 13G, Beneficially owned, Parent Holding Company

3 terms

Schedule 13G regulatory

"Item 1. Name of issuer: RF Acquisition Corp — Schedule 13G filing context"

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

"Item 4. (a) Amount beneficially owned: 732,379"

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.

Parent Holding Company regulatory

"Item 7. Identification and Classification of the Subsidiary — Parent Holding Company"

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

RF Acquisition Corp II

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G75389109

(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): G75389109

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 732,379.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 732,379.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

732,379.00

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)

8.8 %

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: RF Acquisition Corp II
(b)	Address of issuer's principal executive offices: 111 Somerset #05-07 Singapore, Republic of Singapore, 238164
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): G75389109
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: 732,379
(b)	Percent of class: 8.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 732,379
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 732,379
	(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

FAQ

What stake does Mizuho Financial Group hold in RF Acquisition Corp II (RFAI)?

Mizuho Financial Group beneficially holds 732,379 shares, equal to 8.8% of the class as of 03/31/2026. The filing lists sole voting and dispositive power over those shares held through affiliated entities.

Does the Schedule 13G filed by Mizuho indicate active control over RFAI?

No, a Schedule 13G filing generally indicates a passive investor status rather than an intent to exert control. The filing reports beneficial ownership and voting/dispositive powers but does not assert an active control intent.

Which entity holds the RFAI shares on behalf of Mizuho?

The filing states the shares are directly held by Mizuho Securities USA LLC, with Mizuho Financial Group, Mizuho Bank, Ltd., and Mizuho Americas LLC noted as indirect beneficial owners in the disclosure.

When was the ownership percentage reported for Mizuho's RFAI stake?

The Schedule 13G reports the ownership figures for the period ending 03/31/2026. The signature block shows the filing was signed on 05/14/2026 by Takahiro Katsura.