Mizuho Reports 8.5% Stake in DT Cloud Star (308,995 shares)

DT Cloud Star Acquisition Corporation ownership disclosure: Mizuho Financial Group, Inc. reports beneficial ownership of 308,995 common shares (CUSIP G2853N106), representing 8.5% of the class as shown in the filing dated 03/31/2026.

Rhea-AI Filing Summary

DT Cloud Star Acquisition Corporation ownership disclosure: Mizuho Financial Group, Inc. reports beneficial ownership of 308,995 common shares (CUSIP G2853N106), representing 8.5% of the class as shown in the filing dated 03/31/2026. The filing states the position is held through a subsidiary relationship and identifies Mizuho Securities USA LLC as the direct holder; related entities including Mizuho Bank and Mizuho Americas LLC are noted as potential indirect beneficial owners. The Schedule 13G is signed by Takahiro Katsura on 05/14/2026 under the parent holding company framework.

Insights

Institutional Ownership Analyst

Passive institutional stake reported: 308,995 shares (8.5%).

The filing shows Mizuho Financial Group, Inc. as a parent holding company reporting beneficial ownership of 308,995 shares of DT Cloud Star Acquisition Corporation with CUSIP G2853N106. The disclosure identifies a subsidiary, Mizuho Securities USA LLC, as the direct holder and notes related Mizuho entities as indirect owners.

Under the parent filing framework, the statement emphasizes regulatory comparability and willingness to furnish Schedule 13D-type information on request. The ownership level of 8.5% is material for disclosure but remains below common control thresholds that would typically trigger an active acquisition narrative; subsequent filings would show any change in voting or disposition intent.

Key Figures

Filing date (position): 03/31/2026 Shares beneficially owned: 308,995 shares Percent of class: 8.5% +1 more

4 metrics

Filing date (position) 03/31/2026 position date shown on Schedule 13G

Shares beneficially owned 308,995 shares Common Shares (CUSIP G2853N106)

Percent of class 8.5% Percent of class as reported on Schedule 13G

Signature date 05/14/2026 Signed by Takahiro Katsura

Key Terms

Schedule 13G, beneficially owned, Parent Holding Company, CUSIP

4 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: DT Cloud Star Acquisition Corporation"

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: 308,995"

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"

CUSIP financial

"CUSIP Number(s): G2853N106"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

FAQ

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

What stake does Mizuho Financial Group report in DTSQ?

Mizuho Financial Group reports beneficial ownership of 308,995 common shares, equal to 8.5% of the class as shown in the filing dated 03/31/2026. The shares are reported under CUSIP G2853N106.

Who directly holds the DTSQ shares reported by Mizuho?

The filing identifies Mizuho Securities USA LLC as the entity directly holding the reported shares, with Mizuho Bank and Mizuho Americas LLC noted as potential indirect beneficial owners in the exhibit note.

When was the Schedule 13G signed and filed?

The Schedule 13G shows the position date 03/31/2026 and is signed by Takahiro Katsura on 05/14/2026 under the parent holding company certification.

Does this Schedule 13G indicate active acquisition intent by Mizuho?

The filing is a Schedule 13G parent holding company statement and includes a comparability certification; it reports ownership but does not state active acquisition intent or plans to change their position.

What CUSIP and security class are reported for DTSQ?

The filing lists CUSIP G2853N106 and the security class as Common Shares of DT Cloud Star Acquisition Corporation.

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

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Accepted by SEC EDGAR 05/14/2026 - 06:24 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

DT Cloud Star Acquisition Corporation

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G2853N106

(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): G2853N106

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 308,995.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 308,995.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

308,995.00

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)

8.5 %

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: DT Cloud Star Acquisition Corporation
(b)	Address of issuer's principal executive offices: Office 51, 10 Fl 31 Hudson Yards New York, NY 10001
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): G2853N106
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: 308,995
(b)	Percent of class: 8.5 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 308,995
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 308,995
	(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