Institutional Disclosure: Mizuho Files Schedule 13G/A for HSPT 6.9% Holding

Rhea-AI Filing Summary

Mizuho Financial Group reports beneficial ownership of 629,000 common shares of Horizon Space Acquisition II Corp., representing 6.9% of the class. The filing states Mizuho has sole voting and sole dispositive power over these shares, which are directly held by Mizuho Securities USA LLC and may be indirectly owned by related Mizuho entities.

The statement classifies Mizuho as a parent holding company and affirms the securities were acquired and are held in the ordinary course of business, not for the purpose of changing or influencing control of the issuer.

Positive

• Material institutional stake disclosed: 629,000 shares representing 6.9% of the class
• Sole voting and dispositive power: Mizuho reports sole authority to vote and dispose of the reported shares
• Clear ownership chain: Shares are directly held by Mizuho Securities USA LLC, with related Mizuho entities acknowledged as indirect owners

Negative

• None.

Insights

Financial Analyst

TL;DR: Mizuho holds a material, passive 6.9% stake with sole voting/dispositive power, disclosed under Schedule 13G/A.

The 6.9% position (629,000 shares) is above the 5% disclosure threshold and therefore material for shareholder-register monitoring. The filing frames the stake as passive and held in the ordinary course, reducing immediate governance concerns, but sole voting/dispositive power means Mizuho can vote these shares unilaterally. Investors should note institutional interest from a major banking group, though no change-in-control intent is declared in the filing.

Corporate Governance Expert

TL;DR: Disclosure signals significant institutional ownership without declared intent to influence control.

Classifying Mizuho as a parent holding company and identifying the intermediary (Mizuho Securities USA LLC) clarifies ownership chains, which is important for compliance and proxy recordkeeping. The explicit certification that the shares were not acquired to influence control is standard for Schedule 13G filings claiming passive investor status. The combination of sole voting power and a passive declaration creates a clear, documentable position but not a governance action by itself.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Horizon Space Acquisition II Corp.

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G4627B103

(CUSIP Number)

06/30/2025

(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. G4627B103

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 629,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 629,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

629,000.00

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)

6.9 %

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: Horizon Space Acquisition II Corp.
(b)	Address of issuer's principal executive offices: 1412 BROADWAY, 21ST FLOOR SUITE 21V NEW YORK, NY, 10018
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.: G4627B103
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: 629,000
(b)	Percent of class: 6.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 629,000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 629,000
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	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:	08/13/2025

FAQ

How many Horizon Space (HSPT) shares does Mizuho report owning?

Mizuho reports beneficial ownership of 629,000 shares, equal to 6.9% of the class.

Does Mizuho have voting control over its HSPT shares?

Yes. The filing states Mizuho has sole voting power and sole dispositive power over the 629,000 shares.

Which entity filed the Schedule 13G/A for HSPT?

The Schedule 13G/A was filed by Mizuho Financial Group, Inc.

Are the HSPT shares held directly by Mizuho Financial Group?

The shares are directly held by Mizuho Securities USA LLC; Mizuho Financial Group and related entities may be deemed indirect beneficial owners.

Does the filing indicate Mizuho intends to influence control of Horizon Space (HSPT)?

No. The filing certifies the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control.