As of November 6, 2026, Horizon Quantum Holdings Ltd. is a publicly traded company (Nasdaq: HQ). The largest holder reporting an active stake on Schedule 13D is Joseph Francis Fitzsimons, at 38.3%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Founder or officer holdings: Harry L. You, a director and 10% owner (7.4%) (Schedule 13D, March 31, 2026).
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Is Horizon Quantum Holdings Ltd. a real, registered company?
- Horizon Quantum Holdings Ltd. files with the SEC under CIK 2088256 (its SEC filings).
- Its shares are listed under the ticker HQ on Nasdaq (also HQWWW) (SEC company record).
- Incorporated in U0, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Horizon Quantum Holdings Ltd. in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Harry L. You (filed 2026-11-05).
Who are Horizon Quantum Holdings Ltd.'s owners and officers?
Horizon Quantum Holdings Ltd.: industry Services-Computer Programming Services (Schedule 13D/A, 2026-11-05).
| Report | Holder | Share |
|---|---|---|
| Schedule 13D/A, 2026-11-05 | Harry L. You | 7.4% |
| Schedule 13G/A, 2026-08-14 | Tencent Holdings LTD | 11.1% |
| Schedule 13D, 2026-07-09 | Peak Xv Partners Seed Investment | 20.3% |
| Schedule 13G, 2026-06-25 | Ics Opportunities, LTD. | 0.1% |
| Schedule 13D, 2026-04-01 | Ionq, Inc. | 13.3% |
| Schedule 13D, 2026-03-31 | Joseph Francis Fitzsimons | 38.3% |
| Schedule 13G, 2026-03-25 | Tencent Holdings LTD | 13.1% |
| Schedule 13D, 2026-03-20 | Harry L. You | 11.8% |
Questions about who owns Horizon Quantum Holdings Ltd.
Who owns Horizon Quantum Holdings Ltd.?
On this page, 5 holders' latest ownership filings report 5% or more of Horizon Quantum Holdings Ltd.: Joseph Francis Fitzsimons (38.3%, Schedule 13D, filed 2026-03-31), Peak Xv Partners Seed Investment (20.3%, Schedule 13D, filed 2026-07-09), Ionq, Inc. (13.3%, Schedule 13D, filed 2026-04-01), Tencent Holdings LTD (11.1%, Schedule 13G/A, filed 2026-08-14) and Harry L. You (7.4%, Schedule 13D/A, filed 2026-11-05).
Who are the largest shareholders of Horizon Quantum Holdings Ltd.?
By the share each holder's latest filing reports, the largest holders of Horizon Quantum Holdings Ltd. on this page are Joseph Francis Fitzsimons (38.3%), Peak Xv Partners Seed Investment (20.3%) and Ionq, Inc. (13.3%).
When did Joseph Francis Fitzsimons buy into Horizon Quantum Holdings Ltd.?
The filings give report dates, not purchase dates. The earliest filing from Joseph Francis Fitzsimons on this page is the Schedule 13D, filed 2026-03-31, reporting 38.3%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 8 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Horizon Quantum Holdings Ltd. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director and 10% owner: 1,212,698 shares (Form 4, 2026-11-05).
- , a director: 84,602 shares, held indirectly through Penchant Family Holdings LLC (Form 4, 2026-03-25).
- , the chief executive and a director: 10,883 shares (Form 4, 2026-09-15).
- , the chief science officer: 6,337 shares, 2,737 held directly and 3,600 indirectly (Form 4, 2026-09-15).
- , the chief financial officer: 2,165 shares (Form 4, 2026-09-15).
Shares outstanding: 1 as of 2025-12-31, from the company's latest SEC cover page.
How much has Horizon Quantum Holdings Ltd. raised?
Latest IPO step: Horizon Quantum Holdings Ltd. filed to go public (F-1, 2026-04-16).
IPO filings: F-1, 2026-04-16.
Keep reading
More on Horizon Quantum Holdings Ltd. and the records around it.
Horizon Quantum Holdings Ltd. elsewhere on the record
- 5%+ stake filings Nov 2026
Companies that share a holder
- Harry L. You also filed stake reports on 1 other company: Rain Enhancement Technologies Holdco, Inc. (Jun 2026)
- ICS Opportunities, Ltd. also filed stake reports on 2 other companies: Arqit Quantum Inc. (Jun 2026)
- Tencent Holdings Ltd also filed stake reports on 7 other companies: Amer Sports, Inc. (Aug 2026), Kanzhun Ltd (May 2026), Reddit, Inc. (Nov 2025)
Related pages
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