SCHEDULE 13D/A: Major Shareholder Trims Arqit Quantum Stake

A group of major shareholders, including Manfredi Lefebvre d'Ovidio, reduced their beneficial ownership in Arqit Quantum Inc. to 43.2% following recent sales of shares and warrants.

Summary

• Heritage Assets SCSp, M Management S.A., and Manfredi Lefebvre d'Ovidio (the "Reporting Persons") filed Amendment No. 7 to Schedule 13D.
• The amendment updates the aggregate number and percentage of Ordinary Shares of Arqit Quantum Inc. beneficially owned by the Reporting Persons.
• The change is due to the sale of Business Combination Warrants and Ordinary Shares in open market transactions.
• The Reporting Persons' aggregate beneficial ownership is now 9,593,764 Ordinary Shares, representing approximately 43.2% of the outstanding Ordinary Shares.
• This represents a decrease of over one percent (1%) in their aggregate percentage ownership since the filing of Amendment No. 6 on September 24, 2025.
• Sales included 7,889 Business Combination Warrants at an average price of $19.70 on October 13, 2025.
• An additional 10,174 Business Combination Warrants were sold at an average price of $13.80 on October 14, 2025.
• Further, 2,426 Business Combination Warrants were sold at an average price of $16.80 on October 15, 2025.
• 600,000 Ordinary Shares were sold at an average price of $42.76 on October 16, 2025.
• The percentage of beneficial ownership is calculated based on 22,184,708 Ordinary Shares outstanding as of September 18, 2025.
• Arqit Quantum Inc. implemented a 1-for-25 reverse stock split on September 19, 2024, with post-split trading commencing on the Nasdaq Capital Market on September 25, 2024.

Sentiment

Score: 3

Explanation: The reduction in beneficial ownership by a significant shareholder group, through the sale of both ordinary shares and warrants, suggests a potentially negative outlook or strategic divestment by these key investors.

Negatives

• Reporting Persons reduced their beneficial ownership in Arqit Quantum Inc. by selling Business Combination Warrants and Ordinary Shares.
• The aggregate percentage ownership of the Reporting Persons decreased by over 1% since the previous amendment.
• 600,000 Ordinary Shares were sold at an average price of $42.76 on October 16, 2025.
• A total of 20,489 Business Combination Warrants were sold between October 13-15, 2025, at average prices ranging from $13.80 to $19.70.

Future Outlook

No forward-looking statements or guidance from Arqit Quantum Inc. are provided in this filing, which focuses on a change in beneficial ownership by a major shareholder group.

Industry Context

This filing details a significant reduction in ownership by a major shareholder group in Arqit Quantum Inc., a company operating in the quantum technology sector. While the filing does not provide broader industry context, such divestment by a large investor can be interpreted by the market as a signal regarding the company's prospects within its competitive landscape.

Stakeholder Impact

• Shareholders: Potential negative sentiment and downward pressure on share price due to a major shareholder's divestment.

Key Dates

Recommendation

The significant reduction in beneficial ownership by a major shareholder group, including the sale of 600,000 ordinary shares and a substantial number of warrants, signals a potential lack of confidence or a strategic exit. Such divestment by a large, informed investor often precedes downward pressure on the stock price, suggesting a 'sell' recommendation for other investors.

Keywords

Arqit Quantum, Schedule 13D, beneficial ownership, stock sale, warrant sale, insider selling, institutional ownership, reverse stock split