Horizon Quantum director receives 1.16M shares

After the share distribution, Harry L. You reported 1,212,698 directly held Class A Ordinary Shares; the transfer changed only the form of beneficial ownership.

Available on EDGAR 11/05/2026 - 06:32 PM EST Accepted by SEC EDGAR 11/05/2026 - 06:26 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Horizon Quantum Holdings Ltd. director and 10% owner Harry L. You reported that dMY Squared Sponsor, LLC distributed shares and warrants to its members for no consideration on November 3, 2026. You received 1,163,484 Class A Ordinary Shares and 1,442,330 warrants, which he now owns directly. The share transfer changed only the form of his beneficial ownership; his reported direct share position afterward was 1,212,698 shares. The warrants have an exercise price of $11.50 and expire March 19, 2031.

Insider Trade Summary

Other: 3,769,298 shares

Other 3 txns

Insider You Harry L.

Role Director, 10% Owner

Type	Security	Shares	Price	Value
Other	Warrants F2	1,442,330	$0.00	$0.00
Other	Class A Ordinary Shares F1, F3	1,163,484	$0.00	$0.00
Other	Class A Ordinary Shares F1	1,163,484	$0.00	$0.00

Holdings After Transaction: Warrants — 0 contracts (Direct); Class A Ordinary Shares — 0 shares (Indirect, See footnote); Class A Ordinary Shares — 1,212,698 shares (Direct)

Holdings Before and After: Warrants, 1,442,330 to 0 contracts (Direct); Class A Ordinary Shares, 1,163,484 to 0 shares (Indirect, See footnote); Class A Ordinary Shares, 49,214 to 1,212,698 shares (Direct)

Footnotes (3)

1. F1. dMY Squared Sponsor, LLC (the "Sponsor") distributed an aggregate of 1,163,484 Class A Ordinary Shares to its members, pro rata, for no consideration. Harry You, the managing member of the Sponsor, received 1,163,484 of the Class A Ordinary Shares distributed by the Sponsor in respect of his membership interest and now owns such shares directly. The distribution effected only a change in the form of Mr. You's beneficial ownership and is exempt from Section 16(b) pursuant to Rule 16a-13.
2. F2. The Sponsor distributed an aggregate of 2,884,660 warrants to its members, pro rata, for no consideration. Harry You, the managing member of the Sponsor, received 1,442,330 of the warrants distributed by the Sponsor in respect of his membership interest and now owns the warrants directly. The distribution effected only a change in the form of Mr. You's beneficial ownership and is exempt from Section 16(b) pursuant to Rule 16a-13.
3. F3. Prior to the distribution reported herein, Sponsor was the record holder of such securities. Harry L. You is the managing member of the Sponsor and has voting and investment discretion with respect to the securities held of record by the Sponsor.

Key Figures

Class A Ordinary Shares received: 1,163,484 shares Direct Class A Ordinary Shares after transaction: 1,212,698 shares Warrants received: 1,442,330 warrants +2 more

5 metrics

Class A Ordinary Shares received 1,163,484 shares Received by Harry L. You on November 3, 2026, for no consideration

Direct Class A Ordinary Shares after transaction 1,212,698 shares Reported after the November 3, 2026 transaction

Warrants received 1,442,330 warrants Received by Harry L. You on November 3, 2026, for no consideration

Warrant exercise price $11.50 per underlying share Warrants received by Harry L. You

Aggregate warrants distributed by Sponsor 2,884,660 warrants Distributed to the Sponsor's members

Key Terms

pro rata, beneficial ownership, Rule 16a-13

3 terms

pro rata technical

"distributed to its members, pro rata"

Pro rata means dividing or distributing something proportionally based on a specific factor, such as ownership or contribution. For example, if an investor owns 10% of a company, they would receive 10% of any dividends or benefits allocated. This approach ensures everyone gets their fair share relative to their stake or input, helping investors understand how benefits, costs, or responsibilities are fairly shared.

beneficial ownership regulatory

"change in the form of Mr. You's beneficial ownership"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Rule 16a-13 regulatory

"exempt from Section 16(b) pursuant to Rule 16a-13"

FAQ

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

What are the exercise price and expiration date of the HQ warrants?

The warrants have an exercise price of $11.50 and an expiration date of March 19, 2031.

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

Form 4 Insider Transactions: What Each Field Means →

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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

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^*

You Harry L.

(Last) (First) (Middle)

1180 NORTH TOWN CENTER DR

SUITE 100

(Street)

LAS VEGAS NEVADA 89144

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Horizon Quantum Holdings Ltd. [ HQ ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/03/2026

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
Class A Ordinary Shares	11/03/2026		J(1)		1,163,484	D	$0	0	I	See footnote(3)
Class A Ordinary Shares	11/03/2026		J(1)		1,163,484	A	$0	1,212,698	D

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
Warrants	$11.5	11/03/2026		J(2)			1,442,330	04/18/2026	03/19/2031	Class A Ordinary Shares	1,442,330	$0	0	D

Explanation of Responses:

1. dMY Squared Sponsor, LLC (the "Sponsor") distributed an aggregate of 1,163,484 Class A Ordinary Shares to its members, pro rata, for no consideration. Harry You, the managing member of the Sponsor, received 1,163,484 of the Class A Ordinary Shares distributed by the Sponsor in respect of his membership interest and now owns such shares directly. The distribution effected only a change in the form of Mr. You's beneficial ownership and is exempt from Section 16(b) pursuant to Rule 16a-13.

2. The Sponsor distributed an aggregate of 2,884,660 warrants to its members, pro rata, for no consideration. Harry You, the managing member of the Sponsor, received 1,442,330 of the warrants distributed by the Sponsor in respect of his membership interest and now owns the warrants directly. The distribution effected only a change in the form of Mr. You's beneficial ownership and is exempt from Section 16(b) pursuant to Rule 16a-13.

3. Prior to the distribution reported herein, Sponsor was the record holder of such securities. Harry L. You is the managing member of the Sponsor and has voting and investment discretion with respect to the securities held of record by the Sponsor.

	/s/ Harry L. You	11/05/2026
	** 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)