Horizon Space (HSPT) CEO and 10% owner files Form 4 with no insider trades

Rhea-AI Filing Summary

Horizon Space Acquisition II Corp. director and Chief Executive Officer Li Mingyu filed a Form 4 as a ten percent owner, but the filing reports no insider transactions. All buy, sell, acquire, dispose, and derivative transaction counts are zero, indicating no changes in reported holdings in this period.

Key Figures

Net insider share change: 0 shares Buy transactions reported: 0 Sell transactions reported: 0 +2 more

5 metrics

Net insider share change 0 shares NetBuySellShares for this Form 4

Buy transactions reported 0 buyCount in transactionSummary

Sell transactions reported 0 sellCount in transactionSummary

Derivative transactions reported 0 derivativeTransactionCount in transactionSummary

Exercise transactions 0 exerciseCount in transactionSummary

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Li Mingyu

(Last) (First) (Middle)

C/O HORIZON SPACE ACQUISITION II CORP.

1412 BROADWAY, 21ST FLOOR, SUITE 21V

(Street)

NEW YORK NEW YORK 10018

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Horizon Space Acquisition II Corp. [ HSPT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Horizon Space Acquisition II Sponsor Corp. (the "Sponsor") was the record holder of certain securities of Horizon Space Acquisition II Corp. ("HSPT"). Mr. Mingyu Li beneficially owns 50% issued and outstanding shares of the Sponsor. In accordance with the governing documents of the Sponsor, Mr. Mingyu Li is the sole director of the Sponsor and deemed to have the voting and dispositive rights over the securities of HSPT held by the Sponsor. This "Exit" Form 4 is voluntarily filed to report that, in connection with the consummation of the initial business combination of HSPT on June 12, 2026 pursuant to the Business Combination Agreement dated May 9, 2025 by and among HSPT, SL Science Holding Limited, a Cayman Islands exempted company limited by shares, SL BIO Ltd., a Cayman Islands exempted company limited by shares, CW Mega Limited, a Cayman Islands exempted company limited by shares, and WW Century Limited, a Cayman Islands exempted company limited by shares, (i) the Reporting Person no longer served as a director or officer of HSPT or held more than 10% of the issued and outstanding ordinary shares of HSPT after June 12, 2026, and therefore is no longer subject to Section 16 reporting, and (ii) the Sponsor no longer held more than 10% of the issued and outstanding ordinary shares of HSPT after June 12, 2026, and therefore is no longer subject to Section 16 reporting.

	/s/ Mingyu Li	06/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What does Li Mingyu's latest Form 4 for HSPT show?

The Form 4 for Horizon Space Acquisition II Corp. shows no insider transactions by Li Mingyu. All buy, sell, acquire, dispose, and derivative activity counts are zero, indicating no reported change in holdings during the covered period.

Did the Horizon Space (HSPT) CEO buy or sell any shares in this Form 4?

No. The Form 4 shows the Horizon Space Acquisition II Corp. CEO reported zero shares bought or sold. BuyShares, SellShares, exerciseShares, giftShares, and taxWithholdingShares are all listed as 0 for this filing.

What roles does Li Mingyu hold at Horizon Space Acquisition II Corp. (HSPT)?

Li Mingyu is identified as a director, Chief Executive Officer, and ten percent owner of Horizon Space Acquisition II Corp. in this Form 4, reflecting significant leadership responsibility and a substantial ownership position in the company.

Are there any derivative transactions reported for HSPT in this Form 4?

No derivative activity is reported. The filing lists derivativeTransactionCount as 0 and the derivativeSummary is empty, meaning there were no option exercises, conversions, or other derivative transactions disclosed in this Form 4.

Does this Horizon Space (HSPT) Form 4 indicate any gifts or tax-related share transfers?

No. The Form 4 shows giftCount and taxWithholdingCount both at 0, with corresponding share amounts also zero, indicating no reported gifts or tax-withholding share transfers for this period.