Welcome to our dedicated page for Arqit Quantum SEC filings (Ticker: ARQQW), 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.
Trying to gauge whether Arqit Quantum’s quantum-safe encryption is scaling or how new warrant conversions might affect dilution? Every clue hides inside Arqit Quantum Inc’s SEC disclosures, from satellite launch costs to QuantumCloud subscription metrics—yet those details span hundreds of dense pages and constant Form 4 updates.
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Heritage Assets SCSp, M Management S.A. and Manfredi Lefebvre d'Ovidio filed Amendment No. 6 to their Schedule 13D for Arqit Quantum Inc. (Ordinary Shares, CUSIP G0567U127) to update ownership after dilution and to disclose open-market sales of Business Combination Warrants. The Reporting Persons now beneficially own 10,214,252 Ordinary Shares, representing approximately 46.0% of 22,184,708 outstanding Ordinary Shares (post-Reverse Stock Split basis). The amendment lists multiple warrant sales between August 20 and September 15, 2025, with quantities and average prices disclosed. No other transactions or material changes were reported.
Form 144 filing for ARQQW (Arqit Quantum Inc. Warrants) reports a proposed sale of 3 common shares through Fidelity Brokerage Services with an approximate aggregate market value of $84.99, listed for sale on 09/03/2025 on NASDAQ. The filing shows 11,545,354 shares outstanding. The shares were acquired on 09/03/2025 under an option originally granted on 01/04/2021, and payment is listed as cash. The filer discloses prior sales by the same person: 6,500 shares sold on 06/23/2025 for $247,182.70 and 238 shares sold on 07/02/2025 for $8,151.83. The form includes the standard signature representation that the seller is not aware of undisclosed material adverse information.
Amendment No. 5 to Schedule 13D updates the holdings and recent warrant transactions by Heritage Assets SCSp, M Management S.A. and Manfredi Lefebvre d'Ovidio (the Reporting Persons) in Arqit Quantum Inc. The Reporting Persons now beneficially own 10,273,245 Ordinary Shares, representing approximately 49.6% of the outstanding Ordinary Shares on a post-reverse-split basis. The amendment discloses open-market sales of Business Combination Warrants across multiple dates at average prices ranging from $7.6 to $69.4. It also reports that on August 1, 2025 warrants purchased in September 2024 became exercisable for up to 4,600,000 Ordinary Shares, increasing aggregate reported ownership by over 1%.
Arqit Quantum Inc. (ARQQW) filed a Form 144 disclosing that Patrick Willcocks intends to sell 3,000 common shares through Fidelity Brokerage on or about 21 Jul 2025. The shares were obtained via a stock-option exercise on 13 Feb 2025 and carry an aggregate market value of $150,000. With 11,545,354 shares outstanding, the planned sale equals roughly 0.026 % of the float.
The filing also lists prior insider activity: Willcocks sold 8,373 shares between 23 Jun 2025 and 18 Jul 2025 for total gross proceeds of about $331 k. Adding the proposed sale would raise his 90-day disposals to 11,373 shares, or ≈0.10 % of shares outstanding.
No adverse information about Arqit’s operations is asserted, and the sale appears to be routine liquidity following option exercise. Nonetheless, investors may monitor the continued selling cadence as a sentiment signal.
Form 144 filing details
An affiliate of Arqit Quantum Inc. (symbol: ARQQW) has filed a Form 144 indicating an intention to sell up to 333 common shares through Fidelity Brokerage Services LLC on the NASDAQ exchange. The shares have an aggregate market value of $11,005.72 and represent roughly 0.0029 % of the 11,545,354 shares outstanding.
The seller acquired the shares on 07/01/2025 via restricted-stock vesting received as compensation. No other sales have occurred in the past three months, and the filer certifies that no undisclosed adverse information is known. The approximate sale date listed is 07/07/2025.
Given the small size of the transaction, this notice is unlikely to have a measurable effect on the company’s share price or float. Investors typically view Form 144 filings as neutral routine disclosures unless the volume represents a significant percentage of outstanding shares, which is not the case here.
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