Arqit Quantum Inc.: CEO Andrew Leaver sold 5,353 shares

What happened

• Andrew Leaver, CEO, sold 2,535 shares at $23.78 for $60,294 and 2,818 shares at $24.47 for $68,969 on Oct 5, 2026. The filing also reports conversions/exercises and related dispositions of derivative awards at no cash price.

Key details

• Transaction dates and prices: Oct 5, 2026 — sale of 2,535 shares @ $23.78 and 2,818 shares @ $24.47; additional entries on Oct 5, 2026 show acquisitions and dispositions of 5,209 and 5,208 shares at $0.00 tied to derivative conversions/exercises.
• Reported cash proceeds from the sales: $60,294 and $68,969, total $129,263.
• Shares acquired/converted: 5,209 shares and 5,208 shares shown as acquired at $0.00 (derivative conversions/exercises) and corresponding disposals at $0.00 also reported.
• Shares owned after the transactions: not stated in the filing.
• Relevant footnotes from the filing:
  • F1: This trade canceled an Oct 2, 2026 transaction to correct the applicable tax rate and number of units required to be sold in a sell-to-cover transaction.
  • F2: Restricted share units (RSUs) convert into ordinary shares on a one-for-one basis.
  • F3: The price for acquiring the ordinary shares is the same price that the units were sold for on Oct 2, 2026.
  • F4: RSUs vest quarterly on Oct 1, 2026; Jan 1, Apr 1, Jul 1, Oct 1 for 2027, 2028, and 2029 (as listed).
• Filing and reporting: Form filed Oct 7, 2026 reporting transactions dated Oct 5, 2026. The filing does not indicate a late report.

Why it may matter

• The filing shows exercises or conversions of derivative awards (codes M/J) and immediate disposals, consistent with a sell-to-cover or similar transaction per footnote F1.
• The RSUs convert one-for-one into ordinary shares and have a multi-year quarterly vesting schedule per footnotes F2 and F4.
• For derivative transactions, the filing reports that options or RSUs were exercised/converted and related shares were disposed.
• A filing does not show why the insider traded or why the company acted.