Arqit Quantum Inc. SEC filings ARQQ
Arqit Quantum Inc. has 495 filings in SEC EDGAR's recent list, going back to May 12, 2021. Its latest annual report, Form 20-F, was filed on Dec 9, 2025 for the period ended Sep 30, 2025. The most recent current report (Form 6-K) was filed on Oct 8, 2026. The company's fiscal year ends on September 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| 424B3 | Prospectus | May 21, 2026 | — |
| 424B5 | Prospectus supplement | Jan 26, 2026 | — |
| F-3/A | Filing | Jan 23, 2026 | — |
| F-3 | Shelf registration (foreign issuer) | Jan 12, 2026 | — |
| 424B3 | Prospectus | Dec 9, 2025 | — |
| 424B3 | Prospectus | Dec 9, 2025 | — |
| 424B3 | Prospectus | Sep 19, 2025 | — |
| F-3/A | Filing | Sep 15, 2025 | — |
| 424B5 | Prospectus supplement | Sep 15, 2025 | — |
| F-3 | Shelf registration (foreign issuer) | Aug 29, 2025 | — |
| 424B3 | Prospectus | May 22, 2025 | — |
| S-8 | Employee stock plan registration | Feb 5, 2025 | — |
| 424B5 | Prospectus supplement | Jan 29, 2025 | — |
| F-3 | Shelf registration (foreign issuer) | Jan 17, 2025 | — |
| 424B3 | Prospectus | Dec 3, 2024 | — |
| 424B5 | Prospectus supplement | Oct 1, 2024 | — |
| 424B3 | Prospectus | Oct 1, 2024 | — |
| 424B3 | Prospectus | May 20, 2024 | — |
| 424B5 | Prospectus supplement | Apr 15, 2024 | — |
| 424B3 | Prospectus | Apr 15, 2024 | — |
| S-8 | Employee stock plan registration | Dec 8, 2023 | — |
| 424B5 | Prospectus supplement | Sep 11, 2023 | — |
| 424B3 | Prospectus | Sep 8, 2023 | — |
| 424B3 | Prospectus | May 17, 2023 | — |
| 424B5 | Prospectus supplement | Feb 21, 2023 | — |
| 424B5 | Prospectus supplement | Dec 30, 2022 | — |
| F-3/A | Filing | Dec 28, 2022 | — |
| F-3 | Shelf registration (foreign issuer) | Dec 14, 2022 | — |
| 424B3 | Prospectus | Nov 22, 2022 | — |
| POS AM | Filing | Nov 9, 2022 | — |
| 424B3 | Prospectus | May 12, 2022 | — |
| S-8 | Employee stock plan registration | Jan 18, 2022 | — |
| 424B3 | Prospectus | Dec 23, 2021 | — |
| POS AM | Form pos am | Dec 16, 2021 | — |
| 424B3 | Prospectus | Oct 12, 2021 | — |
| F-1/A | Filing | Oct 8, 2021 | — |
| F-1 | Registration statement (foreign issuer) | Oct 1, 2021 | — |
| 424B3 | Prospectus | Aug 30, 2021 | — |
| 424B3 | Prospectus | Aug 23, 2021 | — |
| 424B3 | Prospectus | Jul 30, 2021 | — |
| F-4/A | Filing | Jul 29, 2021 | — |
| F-4/A | Filing | Jul 26, 2021 | — |
| F-4/A | Filing | Jul 9, 2021 | — |
| F-4 | Filing | May 28, 2021 | — |
Showing 44 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Prepackaged Software (SIC 7372)
- Listed as
- ARQQ (Nasdaq)
- Fiscal year ends
- September 30
- Incorporated in
- Cayman Islands
- Headquarters
- London, United Kingdom
- SEC filer status
- Accelerated filer, Emerging growth company
- SEC CIK
- 1859690
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.