Arqit Quantum Inc.
ARQQNasdaqTechnology · Services-Prepackaged Software · E9 · SEC filings ↗ · Compare ⊕
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SEC XBRL · annualNo structured XBRL financials available (common for pre-2009 filers, foreign issuers, or companies that never reported as a US public company).
5%+ owners
SEC Schedule 13D / 13G · last 3 yrs- Heritage Assets Scsp.Activist (13D)May 26, 2026
- Evolution Technology Fund Ii, Scsp.Activist (13D)Feb 10, 2025
- D2bw LtdActivist (13D)Dec 18, 2024
Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.
Insider transactions
SEC Form 4 · most recent4 acquisitions0 disposalsnet +8,160 shares · last 4
| Insider | Date | Type | Shares | Price |
|---|---|---|---|---|
| Pointon NicholasOfficer — Chief Financial Officer | Apr 20, 2026 | Option exercise | 3,066 | $0.00 |
| Ritchie GarthDirector | May 7, 2026 | Option exercise | 1,887 | $0.00 |
| Lefebvre D'Ovidio ManfrediDirector | May 6, 2026 | Option exercise | 1,509 | $0.00 |
| Calabria CarloDirector | May 6, 2026 | Option exercise | 1,698 | $0.00 |
Headline trade per Form 4 (officers, directors, 10%+ owners). Buy/sell read from the filing's structured data — blank where a field isn't cleanly tagged.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 1.5M | 3.6 | +25.0% |
| Apr 30, 2026 | 1.2M | 2.8 | +18.6% |
| Apr 15, 2026 | 1.0M | 3.6 | -2.8% |
| Mar 31, 2026 | 1.1M | 6.1 | +1.4% |
| Mar 13, 2026 | 1.0M | 5.5 | -1.6% |
Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.
Recent SEC filings
All filings ↗- 4OWNERSHIP DOCUMENTJun 1, 2026
- 4OWNERSHIP DOCUMENTMay 28, 2026
- SCHEDULE 13D/AMay 26, 2026
- 4OWNERSHIP DOCUMENTMay 26, 2026
- 4OWNERSHIP DOCUMENTMay 21, 2026
- 424B3May 21, 2026
- 6-KFORM 6-KMay 21, 2026
- 4PRIMARY DOCUMENTMay 20, 2026
- 4OWNERSHIP DOCUMENTMay 19, 2026
- 4OWNERSHIP DOCUMENTMay 15, 2026
- 4OWNERSHIP DOCUMENTMay 13, 2026
- 4OWNERSHIP DOCUMENTMay 12, 2026
- 4PRIMARY DOCUMENTMay 8, 2026
- 4PRIMARY DOCUMENTMay 8, 2026
- 4PRIMARY DOCUMENTMay 8, 2026