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. (ARQQ) director d'Ovidio Manfredi Lefebvre reported conversion of 1,364 restricted share units into ordinary shares on October 1, 2026; the units convert on a one-for-one basis. The five RSU and ordinary-share entries were 1,112, 17, 67, 84 and 84 shares, and the ordinary-share entries report $0.00 per share. Separately, he reported 4,396,891 ordinary shares held indirectly through Heritage Assets SCSP. The RSUs have quarterly vesting schedules extending through October 1, 2028.
Arqit Quantum Inc. General Manager-US Nicholas William Nilan converted 960 Restricted Share Units into 960 ordinary shares on October 1, 2026. His reported direct holdings afterward were 7,671 RSUs and 960 ordinary shares. The RSUs convert into ordinary shares on a one-for-one basis.
Garth Ritchie, a director of Arqit Quantum Inc. (ARQQ), reported four conversions of restricted share units totaling 252 RSUs into 252 ordinary shares on October 1, 2026. The ordinary-share acquisitions were reported at $0.00 per share; RSUs convert on a one-for-one basis. The awards have quarterly vesting schedules with final installments ranging from July 1, 2027, to October 1, 2028. No Rule 10b5-1 plan is reported.
Arqit Quantum Inc. Chief Operating Officer Ben Simon Wilder reported that 445 restricted share units vested on October 1, 2026, converting one-for-one into 445 ordinary shares. The 278 RSUs vest in equal quarterly installments on October 1, 2026, and January 1, April 1, July 1 and October 1, 2027; the 167 RSUs follow quarterly installments through October 1, 2028.
Arqit Quantum Inc. General Counsel Patrick Willcocks reported that 695, 150 and 306 Restricted Share Units vested on October 1, 2026, converting one-for-one into the same respective numbers of ordinary shares. The ordinary-share entries report $0.00 per share. The tranches have quarterly vesting schedules running through July 1, 2027, October 1, 2027, and October 1, 2028, respectively.
Arqit Quantum Inc. officer Nicholas William Nilan reported a proposed sale of 522 common shares on October 5, 2026, through Fidelity Brokerage Services LLC, with an aggregate market value of $12,415.61. The shares are associated with restricted stock vesting on October 2, 2026. The remarks state that the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. The notice also lists 494 shares sold during the past three months on October 2, 2026, with gross proceeds of $12,090.30.
Arqit Quantum Inc. officer and director Andrew J. Leaver filed notice of a proposed sale of 2,535 common shares, with an aggregate market value of $60,294.21 and an approximate sale date of October 5, 2026. The shares are listed as resulting from restricted-stock vesting on October 2, 2026; the notice says the sale includes shares needed to cover a tax obligation from settling the vested award. It also reports 2,818 shares sold during the prior three months for $68,968.58. Wade Moss signed as Fidelity Brokerage Services LLC’s authorized representative and Leaver’s attorney-in-fact.
Arqit Quantum Inc. director Garth Ritchie reported a proposed sale of 127 common shares, with an approximate sale date of October 5, 2026, and an aggregate market value of $3,020.66. The shares are identified as acquired through restricted stock vesting on October 2, 2026. Ritchie stated that the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution.
Arqit Quantum Inc. officer Ben Simon Wilder reported a proposed sale of 233 common shares, with an approximate sale date of October 5, 2026, through Fidelity Brokerage Services LLC. The notice lists an aggregate market value of $5,541.83 and says the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award. It also reports a sale of 221 common shares for an aggregate market value of $5,408.82 on October 2, 2026.
Arqit Quantum Inc. (ARQQ) officer Paul Feenan filed notice of a planned sale of 533 common shares through Fidelity Brokerage Services LLC, with an aggregate market value of $12,677.24. The notice also reports that Feenan sold 506 common shares on October 2, 2026, for $12,384.00. Its remarks say that sale included an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution.