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.
Patrick Willcocks, an officer of Arqit Quantum Inc. (ARQQ), reported a planned sale of 588 common shares, with an aggregate market value of $13,985.40 and an approximate sale date of October 5, 2026. Fidelity Brokerage Services LLC is listed as broker and NASDAQ as the exchange. The shares were acquired through restricted stock vesting on October 2, 2026, as compensation; the sale includes an amount necessary to cover a tax obligation from settlement of a vested equity award distribution. The notice also lists 557 shares sold on October 2, 2026, for $13,632.18 during the prior three months.
Arqit Quantum Inc. director Garth Ritchie reported a proposed sale of 121 common shares, with an aggregate market value of $2,961.39 and an approximate sale date of October 2, 2026. The notice lists 121 shares acquired from the issuer through restricted stock vesting on October 1, 2026, as compensation. It also reports a sale of 439 common shares for $11,063.94 on July 2, 2026, during the prior three months. Remarks state the proposed sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution.
Arqit Quantum Inc. officer Nicholas William Nilan gave notice of an intended sale of 494 common shares, with an aggregate market value of $12,090.30. The notice lists October 2, 2026 as the approximate sale date, through Fidelity Brokerage Services LLC on Nasdaq. It also lists 494 common shares as restricted stock vesting on October 1, 2026, and says the sale includes an amount necessary to cover a tax obligation from settlement of a vested equity award distribution. Daniel Tucci signed as Fidelity Brokerage Services LLC’s authorized representative and attorney-in-fact for Nicholas Nilan.
Arqit Quantum Inc. (ARQQ) officer Patrick Willcocks reported a proposed sale of 557 common shares through Fidelity Brokerage Services LLC, with an approximate sale date of October 2, 2026 and an aggregate market value of $13,632.18. He acquired 557 common shares from the issuer on October 1, 2026 through restricted stock vesting as compensation. A prior sale listed for July 2, 2026 covered 2,009 common shares with an aggregate market value of $50,632.02. The proposed sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution.
Arqit Quantum Inc. officer Paul Feenan reported a proposed sale of 506 common shares for October 2, 2026, with an aggregate market value of $12,384.00. 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 506 shares acquired from the issuer as compensation upon restricted stock vesting on October 1, 2026, and 1,834 shares sold on July 2, 2026, with gross proceeds of $46,221.57.
Arqit Quantum Inc. identifies Andrew J. Leaver, marked as an officer and director, in a Form 144 notice for a proposed sale of 2,818 common shares on October 2, 2026, with an aggregate market value of $68,968.58; Fidelity Brokerage Services LLC is named as broker. The remarks say the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. The notice also lists 9,893 common shares sold on July 2, 2026, for an aggregate value of $249,329.32 during the preceding three months. Jennifer Ruchti signed as the broker's duly authorized representative and attorney-in-fact for Leaver.
Arqit Quantum Inc. officer Ben Wilder reported a proposed sale of 221 common shares, with an approximate sale date of October 2, 2026. The shares are listed as compensation from restricted stock vesting on October 1, 2026. The notice says the sale includes an amount necessary to cover a tax obligation resulting from settlement of a vested equity award distribution. Ben Wilder reported sales of 769 common shares for $19,380.80 during the prior three months.
Arqit Quantum Inc. (ARQQ) director Lefebvre d'Ovidio Manfredi reported that Heritage Assets SCSp exercised 4,600,000 Ordinary Share Purchase Warrants on September 22, 2026, acquiring 4,600,000 ordinary shares at $2.50 per share. Each warrant entitled its holder to purchase one ordinary share and had an expiration date of September 30, 2026. After the transaction, 8,942,448 ordinary shares were beneficially owned indirectly through Heritage Assets SCSp, and the director held 49,023 ordinary shares directly. No Rule 10b5-1 plan is reported.
Arqit Quantum Inc. (ARQQ) received an amended Schedule 13G from Notion Capital III reporting beneficial ownership of 1,812,206 Ordinary Shares, representing 10.0% of the class. All shares are held of record by Liberum Wealth Limited for the account of Notion Capital III LP, including 124 shares held by Notion Platform Limited and 76,381 shares issuable upon conversion of Registered Direct Warrants at $19.50 per share, all after a Reverse Share Split. On June 26, 2026, Notion Capital III exercised in full 600,000 September 2024 Warrants at $2.50 per share, resulting in the issuance of 600,000 Ordinary Shares, and on June 24, 2026 it sold 58,263 Ordinary Shares from previously held shares. Notion Capital III reports shared voting and dispositive power over all 1,812,206 shares and no sole power.
Arqit Quantum Inc. (ARQQ) reports the results of its 2026 annual general meeting of shareholders held on September 8, 2026. Holders of 9,421,171 ordinary shares as of the August 13, 2026 record date were represented in person or by proxy, constituting a quorum, and all proposals were approved. Shareholders reappointed directors, including Carlo Calabria and Andrew Leaver, to serve until the 2029 AGM or until their successors are appointed and qualified. The information in this report is also incorporated by reference into the company’s existing Form S-8 and Form F-3 registration statements, except as otherwise indicated.