Arqit Quantum Inc. filings document foreign private issuer disclosures for a quantum-safe encryption software company listed on Nasdaq under ARQQ and ARQQW. Recent Form 6-K reports furnish preliminary financial results, revenue-recognition context tied to customer contracts, board and audit committee changes, executive-transition matters, and litigation contingency updates.
The filing record also references registration statements on Form S-8 and Form F-3, linking current reports to equity compensation and securities-registration disclosures. These documents frame Arqit’s public-company reporting around governance, capital structure, operating results, litigation contingencies and material events associated with its cybersecurity business.
Arqit Quantum Inc. director d'Ovidio Manfredi Lefebvre reported 8,942,448 ordinary shares beneficially owned indirectly through Heritage Assets SCSP as of October 1, 2026. The amendment incorporates total indirect holdings after the reporting person's transactions reported for June 30 and July 1, 2026. The entry records a holding, not a purchase or sale.
Arqit Quantum Inc. director d'Ovidio Manfredi Lefebvre is listed with 4,342,448 ordinary shares beneficially owned through Heritage Assets SCSP. The amendment incorporates total indirect holdings after the reporting person exercised a reported transaction on September 22, 2026.
Arqit Quantum Inc. director d'Ovidio Manfredi Lefebvre received a grant of 817 restricted share units (RSUs) on October 15, 2026; the RSUs vested within the week of the grant date. On October 16, 2026, they converted one-for-one into 817 ordinary shares, leaving him with 53,924 directly held ordinary shares. Separately, 8,942,448 ordinary shares were beneficially owned through Heritage Assets SCSP as of October 15, 2026.
Arqit Quantum Inc. director Carlo Calabria received a grant of 919 restricted share units on October 15, 2026. The RSUs vested within the week of grant and converted on October 16, 2026, into 919 ordinary shares on a one-for-one basis. After conversion, his reported direct holdings were 234,147 ordinary shares.
Arqit Quantum Inc. director Garth Ritchie received 1,021 restricted share units on October 15, 2026. On October 16, he converted 1,021 RSUs into 1,021 ordinary shares; the units vested within the week of the grant date and convert into ordinary shares on a one-for-one basis. His reported direct holdings after the conversion were 106,855 ordinary shares.
Arqit Quantum Inc. Chief Executive Officer Andrew Leaver sold 2,573 ordinary shares on October 13, 2026, at $16.4040 per share. After the sale, he directly held 53,966 ordinary shares. Arqit states that, as a foreign private issuer, the reporting person's transactions are exempt from Sections 16(b) and 16(c) of the Securities Exchange Act of 1934.
Arqit Quantum Inc. Chief Executive Officer Andrew Leaver converted 5,209 restricted share units into 5,209 ordinary shares on October 12, 2026, on a one-for-one basis. After conversion, his reported direct holdings were 56,539 ordinary shares and 187,500 restricted share units. The reported schedule lists quarterly vesting dates from October 1, 2026, through October 1, 2029.
Arqit Quantum Inc. reports Andrew J. Leaver’s proposed sale of 2,573 common shares, with an aggregate market value of $42,207.49 and an approximate sale date of October 13, 2026. Fidelity Brokerage Services LLC is listed in the sale information. The shares are listed as acquired through restricted stock vesting on October 9, 2026, as compensation; the sale includes an amount needed to cover a tax obligation resulting from settlement of a vested equity award.
Arqit Quantum Inc. Chief Operating Officer Ben Simon Wilder reported a sale of 218 ordinary shares on October 6, 2026, at $24.1915 per share, in a transaction described as an open-market or private transaction. His reported direct holdings afterward were 4,243 shares, and no Rule 10b5-1 plan is reported.
Arqit Quantum Inc.'s General Manager-US, Nicholas William Nilan, reported selling 493 Ordinary Shares on October 6, 2026, at $24.1915 per share. He reported 1,370 directly held Ordinary Shares following the transaction; no Rule 10b5-1 plan is reported.