Welcome to our dedicated page for Arqit Quantum SEC filings (Ticker: ARQQ), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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 exercised derivative securities to increase his direct equity stake. He exercised Ordinary Share Purchase Warrants covering 120,000 Arqit Quantum ordinary shares at an exercise price of $2.50 per share, converting them into Ordinary Shares.
After this warrant exercise, Calabria directly holds 230,922 Ordinary Shares. The related warrant position reported in this filing was fully exercised, with zero warrants remaining outstanding from this specific grant.
Arqit Quantum Inc. director Ritchie Garth exercised Ordinary Share Purchase Warrants to acquire additional equity in the company. He exercised warrants covering 73,562 Ordinary Shares at an exercise price of $2.50 per share, converting a derivative position into common equity.
Following the exercise, Garth directly holds 104,249 Ordinary Shares of Arqit Quantum Inc. The warrants exercised relate to Ordinary Share Purchase Warrants that now show zero remaining derivative balance in this filing, indicating a full exercise of that specific warrant block with no same-day share sales reported.
Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported open‑market sales of Business Combination Warrants. The entity sold 124 warrants on June 4, 2026 and 116 warrants on June 3, 2026, both at $1.50 per warrant.
According to the footnote, the reporting person beneficially owns 528,634 Business Combination Warrants, each with an exercise price of $11.50 and exercisable into 0.04 ordinary share, equivalent to 21,145.36 ordinary shares on a post‑reverse‑split basis.
Arqit Quantum Inc. filed an initial Form 3 for Chief Financial Officer Russell Robert Michael. This filing establishes him as a reporting insider of the company and, based on the data provided, does not report any buy, sell, or other equity transactions at this time.
Arqit Quantum Inc. director Cristina Levis filed an initial Form 3, which is a statement of beneficial ownership for insiders. This filing does not show any stock purchases, sales, option exercises, or other transactions, and it does not list any specific share holdings.
Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported small open-market sales of Business Combination Warrants. The entity sold 132 warrants on June 2, 2026 and 106 warrants on June 1, 2026, both at $1.60 per warrant. The footnote states the reporting person beneficially owns 534,634 such warrants in total, which, if fully exercised at an exercise price of $11.50 each for 0.04 of an ordinary share per warrant, would equal 21,385.36 ordinary shares on a post–reverse stock split basis. The warrants relate to Arqit’s 25‑for‑1 reverse stock split and are exercisable until September 3, 2026.
Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi, through Heritage Assets SCSp, reported small open-market sales of Business Combination Warrants linked to Arqit ordinary shares. On May 28, 2026, Heritage Assets SCSp sold 150 warrants at $1.80 each, and on May 29, 2026 it sold 227 warrants at $1.70 each.
The warrants each have an exercise price of $11.50 and, after Arqit’s 1-for-25 reverse stock split announced on September 19, 2024, every warrant represents the right to purchase 0.04 of an ordinary share, with at least 25 warrants needed for one whole share. The reporting person beneficially owns 540,588 Business Combination Warrants, which if fully exercised would equal 21,623.52 ordinary shares, so the 377 warrants sold represent a small portion of this position.
Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi reported open-market sales of Business Combination Warrants that are beneficially owned through Heritage Assets SCSp. On May 26 and 27, 2026, entities associated with the director sold a total of 303 Business Combination Warrants at $1.80 per warrant.
The reporting person continues to beneficially own 550,013 Business Combination Warrants, which are equivalent to 22,000.52 Arqit Quantum ordinary shares on a post-reverse stock split basis. Each warrant has an exercise price of $11.50 and entitles the holder to purchase 0.04 of an ordinary share, requiring 25 warrants to receive one whole share.
Heritage Assets SCSp, M Management S.A. and Manfredi Lefebvre d'Ovidio filed Amendment No. 9 to update their beneficial ownership in Arqit Quantum Inc. after dilution from new Ordinary Shares issued by Arqit. They report beneficial ownership of about 9,249,963.80 Ordinary Shares, or 38.4% of the class on a post–reverse stock split basis, while Manfredi Lefebvre d'Ovidio is deemed to beneficially own 9,298,313.80 shares, or 38.6%. Percentages are based on 24,090,585 Ordinary Shares outstanding as of May 19, 2026. The amendment also details open‑market sales of Arqit Business Combination Warrants at various prices between November 2025 and May 2026.
Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi reported indirect open-market sales of Business Combination Warrants beneficially owned through Heritage Assets SCSp. On May 21 and May 22, the entity sold a total of 1,788 warrants at prices of $2.10 and $1.90 per warrant.
After these transactions, the reporting person continues to beneficially own 557,584 Business Combination Warrants, which the footnote states are equivalent to 22,303.36 ordinary shares on a post-reverse stock split basis. Each warrant has an exercise price of $11.50 and can be exercised until September 3, 2026.