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 |
|---|---|---|---|
| 25-NSE | Delisting notice | Sep 2, 2026 | — |
| EFFECT | Filing | Jan 26, 2026 | — |
| CORRESP | Letter to the SEC | Jan 23, 2026 | — |
| UPLOAD | Letter from the SEC | Jan 16, 2026 | — |
| EFFECT | Filing | Sep 19, 2025 | — |
| CORRESP | Letter to the SEC | Sep 17, 2025 | — |
| UPLOAD | Letter from the SEC | Sep 9, 2025 | — |
| EFFECT | Filing | Jan 29, 2025 | — |
| CORRESP | Letter to the SEC | Jan 28, 2025 | — |
| UPLOAD | Letter from the SEC | Jan 27, 2025 | — |
| EFFECT | Filing | Dec 30, 2022 | — |
| CORRESP | Letter to the SEC | Dec 28, 2022 | — |
| UPLOAD | Letter from the SEC | Dec 23, 2022 | — |
| EFFECT | Filing | Nov 22, 2022 | — |
| UPLOAD | Letter from the SEC | Aug 15, 2022 | — |
| CORRESP | Letter to the SEC | Jul 11, 2022 | — |
| UPLOAD | Letter from the SEC | Jun 28, 2022 | — |
| CORRESP | Letter to the SEC | Jun 15, 2022 | — |
| UPLOAD | Letter from the SEC | Jun 1, 2022 | — |
| EFFECT | Filing | Dec 23, 2021 | — |
| EFFECT | Filing | Oct 12, 2021 | — |
| CORRESP | Letter to the SEC | Oct 12, 2021 | — |
| UPLOAD | Letter from the SEC | Oct 6, 2021 | — |
| CERT | 8a cert | Sep 3, 2021 | — |
| 8-A12B | Form 8-a12b | Sep 1, 2021 | — |
| 425 | Filing | Sep 1, 2021 | — |
| 425 | Filing | Aug 30, 2021 | — |
| 425 | Filing | Aug 27, 2021 | — |
| 425 | Filing | Aug 27, 2021 | — |
| 425 | Filing | Aug 24, 2021 | — |
| 425 | Filing | Aug 19, 2021 | — |
| 425 | Filing | Aug 12, 2021 | — |
| 425 | Filing | Aug 11, 2021 | — |
| 425 | Filing | Aug 11, 2021 | — |
| 425 | Filing | Aug 9, 2021 | — |
| 425 | Filing | Aug 3, 2021 | — |
| 425 | Filing | Aug 3, 2021 | — |
| 425 | Filing | Aug 3, 2021 | — |
| 425 | Filing | Aug 3, 2021 | — |
| EFFECT | Filing | Jul 30, 2021 | — |
| CORRESP | Letter to the SEC | Jul 29, 2021 | — |
| CORRESP | Letter to the SEC | Jul 29, 2021 | — |
| UPLOAD | Letter from the SEC | Jul 27, 2021 | — |
| 425 | Filing | Jul 27, 2021 | — |
| 425 | Filing | Jul 27, 2021 | — |
| 425 | Form 425 | Jul 23, 2021 | — |
| 425 | Filing | Jul 19, 2021 | — |
| CORRESP | Letter to the SEC | Jul 9, 2021 | — |
| UPLOAD | Letter from the SEC | Jun 24, 2021 | — |
| 425 | Filing | Jun 17, 2021 | — |
| 425 | Filing | May 20, 2021 | — |
| 425 | Filing | May 17, 2021 | — |
| 425 | Filing | May 12, 2021 | — |
| 425 | Filing | May 12, 2021 | — |
| 425 | Filing | May 12, 2021 | — |
Showing 55 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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
Other Services-Prepackaged Software companies
- Microsoft Corp MSFT
- Palantir Technologies Inc. PLTR
- Oracle Corp ORCL
- Sap SE SAP
- CrowdStrike Holdings, Inc. CRWD
- Shopify Inc. SHOP
- Salesforce, Inc. CRM
- ServiceNow, Inc. NOW
Source: SEC EDGAR filings. This is company-reported data, not investment advice.