STOCK TITAN

Horizon Quantum (HQ) sponsor granted 1.16M shares and 2.88M warrants

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Horizon Quantum Holdings Ltd. reported that dMY Squared Sponsor, LLC, an entity associated with director and 10% owner Harry L. You, acquired indirect equity interests in connection with the closing of its business combination with Horizon Quantum Computing Pte. Ltd. and dMY Squared Technology Group, Inc.

The Sponsor received 1,163,484 Class A ordinary shares as a grant in exchange for 1,163,484 shares of DMY Class A common stock, and 2,884,660 warrants to purchase Class A ordinary shares at an exercise price of $11.50 per share, both at a transaction price of $0.00 per security. On the business combination effective date, DMY’s Class A common stock closed at $13.50 and its warrants at $2.69.

After these transactions, Mr. You is reported with 1,163,484 Class A ordinary shares and 2,884,660 warrants held indirectly through the Sponsor and 49,214 Class A ordinary shares held directly, while each reporting person disclaims beneficial ownership except to the extent of pecuniary interest.

Positive

  • None.

Negative

  • None.

Insights

Equity and warrants were granted for a SPAC business combination, not open-market buying.

The filing shows dMY Squared Sponsor, LLC, associated with Harry L. You, receiving 1,163,484 Class A ordinary shares and 2,884,660 warrants at $0.00 per security. These grants occurred as consideration in the business combination between Horizon Quantum Holdings, Horizon Quantum Computing Pte. Ltd., and dMY Squared Technology Group.

The warrants carry an exercise price of $11.50 and expire on March 19, 2031, so any future value realization depends on Horizon Quantum’s share price exceeding this level. On the effective date, DMY’s Class A stock and warrants closed at $13.50 and $2.69, respectively, highlighting the economic value exchanged at closing.

The filing also reports 49,214 Class A shares held directly by Mr. You. Because the transactions are compensation-like awards tied to the deal closing, rather than discretionary market purchases or sales, they mainly clarify post-merger ownership structure rather than signaling a change in insider sentiment.

Insider You Harry L.
Role Director, 10% Owner
Type Security Shares Price Value
Grant/Award Warrants 2,884,660 $0.00 --
Grant/Award Class A Ordinary Shares 1,163,484 $0.00 --
holding Class A Ordinary Shares -- -- --
Holdings After Transaction: Warrants — 2,884,660 shares (Indirect, See footnote); Class A Ordinary Shares — 1,163,484 shares (Indirect, See footnote); Class A Ordinary Shares — 49,214 shares (Direct)
Footnotes (1)
  1. In connection with the closing of the business combination (the "Business Combination") among Horizon Quantum Holdings Ltd. (the "Issuer"), Horizon Quantum Computing Pte. Ltd. ("Horizon"), and dMY Squared Technology Group, Inc. ("DMY"), these Class A ordinary shares of the Issuer were issued pursuant to the terms of the Business Combination Agreement, dated as of September 9, 2025, by and among the Issuer, Horizon, and DMY (the "Business Combination Agreement") upon the exchange of 1,163,484 shares of Class A common stock of DMY. On the effective date of the Business Combination, the closing price of DMY's Class A common stock was $13.50. In connection with the closing of the Business Combination, these warrants of the Issuer were issued pursuant to the terms of the Business Combination Agreement upon the exchange of 2,884,660 warrants of DMY. On the effective date of the Business Combination, the closing price of DMY's warrants was $2.69. dMY Squared Sponsor, LLC (the "Sponsor") Sponsor is the record holder of the securities reported herein. 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. Each of the Sponsor and Mr. You is a "Reporting Person" and may be deemed to beneficially own the securities reported herein; however, each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein. Solely for purposes of Section 16 of the Exchange Act, each Reporting Person may be deemed a "director by deputization".
SEC Form 4
FORM 4UNITED 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)
XDirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Class A Ordinary Shares03/19/2026A1,163,484A(1)1,163,484ISee footnote(3)
Class A Ordinary Shares49,214D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Warrants$11.503/19/2026A2,884,66004/18/202603/19/2031Class A Ordinary Shares2,884,660(2)2,884,660ISee footnote(3)
Explanation of Responses:
1. In connection with the closing of the business combination (the "Business Combination") among Horizon Quantum Holdings Ltd. (the "Issuer"), Horizon Quantum Computing Pte. Ltd. ("Horizon"), and dMY Squared Technology Group, Inc. ("DMY"), these Class A ordinary shares of the Issuer were issued pursuant to the terms of the Business Combination Agreement, dated as of September 9, 2025, by and among the Issuer, Horizon, and DMY (the "Business Combination Agreement") upon the exchange of 1,163,484 shares of Class A common stock of DMY. On the effective date of the Business Combination, the closing price of DMY's Class A common stock was $13.50.
2. In connection with the closing of the Business Combination, these warrants of the Issuer were issued pursuant to the terms of the Business Combination Agreement upon the exchange of 2,884,660 warrants of DMY. On the effective date of the Business Combination, the closing price of DMY's warrants was $2.69.
3. dMY Squared Sponsor, LLC (the "Sponsor") Sponsor is the record holder of the securities reported herein. 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. Each of the Sponsor and Mr. You is a "Reporting Person" and may be deemed to beneficially own the securities reported herein; however, each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein. Solely for purposes of Section 16 of the Exchange Act, each Reporting Person may be deemed a "director by deputization".
Remarks:
Due to the Issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Act, the Reporting Person's transactions in the Issuer's equity securities are exempt from Sections 16(b) and 16(c) of the Act.
/s/ Harry L. You03/20/2026
** Signature of Reporting PersonDate
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 insider transactions did Horizon Quantum Holdings (HQ) report in this Form 4?

The filing reports dMY Squared Sponsor, LLC, associated with Harry L. You, receiving 1,163,484 Class A ordinary shares and 2,884,660 warrants of Horizon Quantum Holdings as grants at $0.00 per security, all issued in connection with the company’s business combination involving Horizon and dMY Squared Technology Group.

How many Horizon Quantum Holdings (HQ) warrants were granted and on what terms?

The Sponsor received 2,884,660 Horizon Quantum Holdings warrants as part of the business combination. Each warrant allows the purchase of one Class A ordinary share at an exercise price of $11.50 and carries an expiration date of March 19, 2031, defining a long-dated potential equity position.

What share grants did the Sponsor linked to Harry L. You receive in Horizon Quantum (HQ)?

In connection with the business combination, dMY Squared Sponsor, LLC received 1,163,484 Class A ordinary shares of Horizon Quantum Holdings. These were issued in exchange for 1,163,484 shares of DMY Squared Technology Group Class A common stock, with no cash consideration reported in the transaction.

Does Harry L. You hold Horizon Quantum (HQ) shares directly after these transactions?

Yes. The Form 4 shows Harry L. You with 49,214 Class A ordinary shares held directly. Separately, 1,163,484 Class A shares and 2,884,660 warrants are held indirectly through dMY Squared Sponsor, LLC, with each reporting person disclaiming beneficial ownership beyond pecuniary interests.

How are the Horizon Quantum (HQ) securities attributed between Harry L. You and the Sponsor?

The securities issued in the business combination are held of record by dMY Squared Sponsor, LLC. Harry L. You is the Sponsor’s managing member with voting and investment discretion, so both are reporting persons, yet each disclaims beneficial ownership except for their pecuniary interest in the reported securities.

What were DMY Squared’s market prices when the Horizon Quantum (HQ) deal closed?

On the effective date of the business combination, DMY Squared Technology Group’s Class A common stock closed at $13.50 per share and its warrants closed at $2.69. These prices indicate the market valuation of the exchanged DMY securities used to determine the Horizon Quantum consideration.