Arqit Quantum Inc. reports

Company location: London, United Kingdom
Fiscal year end: 30 September

Arqit Quantum Inc. has filed 400 SEC EDGAR filings since 12 May 2021

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SEC filing history

Showing 1-25 of 400 matching filings.

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1

4

OWNERSHIP DOCUMENT

Filing date: 17 Jun 2026
Reporting date: 15 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

144 File 001-40777

144 filing

Filing date: 17 Jun 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

6-K File 001-40777

FORM 6-K

Filing date: 17 Jun 2026
Reporting date: 17 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 15 Jun 2026
Reporting date: 11 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 11 Jun 2026
Reporting date: 09 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 09 Jun 2026
Reporting date: 05 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2026
Reporting date: 03 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 05 Jun 2026
Reporting date: 05 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 05 Jun 2026
Reporting date: 03 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

3

PRIMARY DOCUMENT

Filing date: 05 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

3

PRIMARY DOCUMENT

Filing date: 05 Jun 2026
Reporting date: 01 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 03 Jun 2026
Reporting date: 01 Jun 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 01 Jun 2026
Reporting date: 28 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 28 May 2026
Reporting date: 26 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

SCHEDULE 13D/A File 005-92850

SCHEDULE 13D/A filing

Filing date: 26 May 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 26 May 2026
Reporting date: 21 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 21 May 2026
Reporting date: 19 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

424B3 File 333-259982

424B3

Filing date: 21 May 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

6-K File 001-40777

FORM 6-K

Filing date: 21 May 2026
Reporting date: 31 Mar 2026
SEC evidence: Open document Open filing Open XBRL
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 20 May 2026
Reporting date: 20 Apr 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 19 May 2026
Reporting date: 15 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 15 May 2026
Reporting date: 13 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 13 May 2026
Reporting date: 12 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

OWNERSHIP DOCUMENT

Filing date: 12 May 2026
Reporting date: 08 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4

PRIMARY DOCUMENT

Filing date: 08 May 2026
Reporting date: 07 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

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