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 Carlo Calabria reported the conversion of 250 restricted share units into 250 ordinary shares on October 2, 2026. The RSUs convert one-for-one, and the ordinary-share entries report a price of $0.00 per share. The RSUs vest in equal quarterly installments, with the schedules attached to the reported amounts running from October 1, 2026, through October 1, 2028.
Arqit Quantum Inc. (ARQQ) is the issuer named in a notice listing a proposed sale by Patrick Willcocks, an officer, of 555 common shares, with an aggregate market value of $13,426.28, through Fidelity Brokerage Services LLC. The approximate sale date is October 6, 2026. Arqit shares outstanding are listed as 15,291,767.
The shares to be sold are listed as acquired from the issuer on October 5, 2026, through restricted stock vesting as compensation. The remarks say the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. Joshua Schmitt signed as a duly authorized representative of Fidelity Brokerage Services LLC and attorney-in-fact for Patrick Willcocks.
Arqit Quantum Inc. officer Nicholas W. Nilan gave notice of a proposed sale of 493 common shares, with an aggregate market value of $11,926.41 and an approximate sale date of October 6, 2026. The shares were acquired from the issuer through restricted stock vesting on October 5, 2026, as compensation. The notice says the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. It also lists two sales during the prior three months: 494 shares for $12,090.30 on October 2, 2026, and 522 shares for $12,415.61 on October 5, 2026.
Arqit Quantum Inc. director Garth Ritchie reported a proposed sale of 118 common shares on October 6, 2026, with an aggregate market value of $2,854.60. Those shares were acquired from the issuer through restricted stock vesting on October 5, 2026, as compensation. The notice says the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. It also lists prior sales of 121 shares for $2,961.39 on October 2, 2026, and 127 shares for $3,020.66 on October 5, 2026.
Arqit Quantum Inc. officer Ben Simon Wilder reported a planned sale of 218 common shares on October 6, 2026, through Fidelity Brokerage Services LLC, with an aggregate market value of $5,273.75. The notice says the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award. The past-three-months section lists Ben Wilder sales of 221 shares for $5,408.82 on October 2 and 233 shares for $5,541.83 on October 5. Wade Moss signed as Fidelity Brokerage Services LLC’s duly authorized representative and attorney-in-fact for Ben Wilder.
Arqit Quantum Inc. (ARQQ) is named in a notice listing a proposed sale for Andrew J. Leaver, identified as an officer and director: 2,398 common shares through Fidelity Brokerage Services LLC. The notice lists an aggregate market value of $58,011.22 and an approximate sale date of October 6, 2026. The shares were acquired through restricted stock vesting as compensation on October 5, 2026; the sale includes an amount to cover a tax obligation from settlement of a vested equity award. The notice also lists 2,535 shares sold during the prior three months, valued at $60,294.21. Jennifer Ruchti signed as a duly authorized representative of Fidelity Brokerage Services LLC and attorney-in-fact for Leaver.
Arqit Quantum Inc. officer Paul Feenan reported an intended sale of 504 common shares, with an approximate sale date of October 6, 2026, through Fidelity Brokerage Services LLC on Nasdaq; the stated aggregate market value is $12,192.51. The 504 shares were acquired through restricted-stock vesting on October 5, 2026, as compensation. The notice says the sale includes an amount necessary to cover a tax obligation resulting from settlement of the vested equity award distribution.
Arqit Quantum Inc. director Carlo Calabria reported the vesting and conversion of 252 RSUs into 252 ordinary shares on October 1, 2026. The RSUs convert one-for-one, and the ordinary-share entries report a price of 0.0000 per share. The four awards vest in equal quarterly installments, with schedules extending through dates as late as October 1, 2028.
Arqit Quantum Inc. Chief Revenue Officer Paul Feenan reported converting 1,036 restricted share units into 1,036 ordinary shares on October 1, 2026. The RSUs convert one-for-one. The three award groups have quarterly vesting schedules: two extend through 2027, while one extends through October 2028.
Arqit Quantum Inc. Chief Executive Officer Andrew Leaver converted 5,209 restricted share units (RSUs) into 5,209 ordinary shares on October 1, 2026, under the one-for-one conversion terms. Afterward, his direct holdings were 56,692 ordinary shares and 197,916 RSUs. The RSUs vest in equal quarterly installments on dates running from July 1, 2026, through October 1, 2029.