Columbus Acquisition: Mizuho Reports 8.9% Stake

Columbus Acquisition Corp received a Schedule 13G/A amendment reporting that Mizuho Financial Group, Inc. beneficially owns 400,877 common shares, representing 8.9% of the class.

Rhea-AI Filing Summary

Columbus Acquisition Corp received a Schedule 13G/A amendment reporting that Mizuho Financial Group, Inc. beneficially owns 400,877 common shares, representing 8.9% of the class. The amendment, filed as Amendment No. 3 and signed on 05/14/2026, states sole voting and dispositive power over the reported shares.

The filing notes that Mizuho Securities USA LLC directly holds the shares and that Mizuho Bank, Mizuho Americas LLC and related entities may be deemed indirect beneficial owners.

Insights

Corporate Ownership Specialist

Mizuho reports an 8.9% passive stake in Columbus Acquisition Corp.

The amendment shows 400,877 shares beneficially owned with sole voting and dispositive power, consistent with a parent holding company filing that attributes holdings to a subsidiary. The filing identifies the direct holder as Mizuho Securities USA LLC.

Timing and intent language are limited to the Schedule 13G/A framework; subsequent disclosures would be required for any change in voting arrangements or holdings.

Regulatory Compliance Advisor

Filing follows parent-holding disclosure practice and references comparable foreign regulatory scheme.

The signer certifies that the foreign regulatory scheme is substantially comparable and offers to provide Schedule 13D-type information on request. The filing includes the parent/subsidiary attribution language required under the rules for parent holding companies.

Monitor future amendments if the holder's status moves from passive to active, which would affect filing obligations.

Key Figures

Beneficial ownership: 400,877 shares Percent of class: 8.9% Filing signature date: 05/14/2026

3 metrics

Beneficial ownership 400,877 shares Reported beneficially owned by Mizuho Financial Group

Percent of class 8.9% Percent of common shares reported in Schedule 13G/A

Filing signature date 05/14/2026 Signature date on Amendment No. 3

Key Terms

Schedule 13G/A, Parent Holding Company, Beneficially owned

3 terms

Schedule 13G/A regulatory

"Amendment No. 3 Colum(bus) Acquisition Corp Common Shares"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Parent Holding Company regulatory

"Item 7. | Identification and Classification of the Subsidiary"

Beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 400,877"

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.

FAQ

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

What stake does Mizuho Financial Group report in COLA?

Mizuho Financial Group reports beneficial ownership of 400,877 shares, equal to 8.9% of Columbus Acquisition Corp's common shares. The filing states Mizuho has sole voting and dispositive power over those shares.

Which entity directly holds the reported shares for Mizuho?

The filing attributes the direct holdings to Mizuho Securities USA LLC. It states Mizuho Bank, Mizuho Americas LLC and related entities may be indirect beneficial owners through that wholly‑owned subsidiary.

When was the Schedule 13G/A amendment signed?

The amendment (Amendment No. 3) is signed by Takahiro Katsura on 05/14/2026. The cover header also displays 03/31/2026 in the document text.

Does the filing indicate active control or voting agreements?

The filing shows sole voting and dispositive power over the reported shares but does not disclose any separate voting agreements or change from a passive position within the provided excerpt.

What regulatory assertion does the signer make in the amendment?

The signer certifies that the foreign regulatory scheme applicable to the parent holding company is "substantially comparable" to the U.S. regime and offers to furnish Schedule 13D-type information to the Commission staff upon request.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/14/2026 - 06:22 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Columbus Acquisition Corp

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G2295P107

(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): G2295P107

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 400,877.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 400,877.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

400,877.00

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)

8.9 %

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: Columbus Acquisition Corp
(b)	Address of issuer's principal executive offices: 14 Prudential Tower, Singapore, Republic of Singapore, 049712
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.: G2295P107
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: 400,877
(b)	Percent of class: 8.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 400,877
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 400,877
	(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