As of November 7, 2026, Arqit Quantum Inc. is a publicly traded company (Nasdaq: ARQQ). The largest holder reporting an active stake on Schedule 13D is Heritage Assets SCSp, at 38.6%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Passive holders reporting on Schedule 13G include Notion Capital III LP (10%) (Schedule 13D/A, May 26, 2026).
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Is Arqit Quantum Inc. a real, registered company?
- Arqit Quantum Inc. files with the SEC under CIK 1859690 (its SEC filings).
- Its shares are listed under the ticker ARQQ on Nasdaq (SEC company record).
- Incorporated in E9; business address in London, X0, 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 Arqit Quantum Inc. in our court records and SEC 8-K records (as of 2026-11-07).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Notion Capital III LP (filed 2026-09-10).
Who are Arqit Quantum Inc.'s owners and officers?
Arqit Quantum Inc.: business address in London, X0; industry Services-Prepackaged Software (Schedule 13G/A, 2026-09-10).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-09-10 | Notion Capital Iii LP | 10% |
| Schedule 13G, 2026-06-23 | Millennium Management LLC | 0.3% |
| Schedule 13D/A, 2026-05-26 | Heritage Assets Scsp | 38.6% |
| Schedule 13D/A, 2025-11-12 | Heritage Assets Scsp | 41.8% |
| Schedule 13D/A, 2025-10-20 | Heritage Assets Scsp | 43.2% |
| Schedule 13D/A, 2025-09-24 | Heritage Assets Scsp | 46% |
| Schedule 13D/A, 2025-08-26 | Heritage Assets Scsp | 49.6% |
Questions about who owns Arqit Quantum Inc.
Who owns Arqit Quantum Inc.?
On this page, 2 holders' latest ownership filings report 5% or more of Arqit Quantum Inc.: Heritage Assets Scsp (38.6%, Schedule 13D/A, filed 2026-05-26) and Notion Capital Iii LP (10%, Schedule 13G/A, filed 2026-09-10).
Who are the largest shareholders of Arqit Quantum Inc.?
By the share each holder's latest filing reports, the largest holders of Arqit Quantum Inc. on this page are Heritage Assets Scsp (38.6%) and Notion Capital Iii LP (10%).
When did Heritage Assets Scsp buy into Arqit Quantum Inc.?
The filings give report dates, not purchase dates. The earliest filing from Heritage Assets Scsp on this page is the Schedule 13D/A, filed 2025-08-26, reporting 49.6%; its latest, Schedule 13D/A filed 2026-05-26, reports 38.6%. That earliest filing is itself an amendment, which updates an earlier report.
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%); 7 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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What the Full Report on Arqit Quantum Inc. covers
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Which insiders own Arqit Quantum Inc. 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: 8,942,448 shares (77.5% of shares outstanding), held indirectly through a beneficially owned through heritage assets scsp (Form 4/A, 2026-11-06).
- , a director: 234,147 shares (2.0% of shares outstanding) (Form 4, 2026-10-20).
- , a director: 106,855 shares (0.93% of shares outstanding) (Form 4, 2026-10-20).
- , the chief executive: 53,966 shares (0.47% of shares outstanding) (Form 4, 2026-10-15).
- , the chief revenue officer: 20,912 shares (0.18% of shares outstanding) (Form 4, 2026-10-08).
Shares outstanding: 11,545,354 as of 2024-09-30, from the company's latest SEC cover page.
How much has Arqit Quantum Inc. raised?
No fundraising or offering filing from Arqit Quantum Inc. is on file with us.
Keep reading
More on Arqit Quantum Inc. and the records around it.
Arqit Quantum Inc. elsewhere on the record
- 5%+ stake filings Sep 2026
Companies that share a holder
- ICS Opportunities, Ltd. also filed stake reports on 2 other companies: Horizon Quantum Holdings Ltd. (Jun 2026)
Related pages
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Cite this page
https://mentionfox.com/who-owns/arqit-quantum