Director Manfredi Lefebvre d'Ovidio filed a Form 4 with the SEC on September 23, 2026, reporting the exercise of Ordinary Share Purchase Warrants and a resulting change in beneficial ownership of Arqit Quantum Inc. (NASDAQ:ARQQ) ordinary shares dated September 22, 2026.

Key Highlights

  • Warrant exercise: 4,600,000 Ordinary Share Purchase Warrants were exercised on September 22, 2026, at a price of $2.5 per share, acquiring 4,600,000 ordinary shares.
  • Post-transaction ownership: Following the transaction, the reporting person beneficially owns 8,942,448 ordinary shares, held indirectly through Heritage Assets SCSp.
  • Warrants disposed: The 4,600,000 warrants exercised are reported as disposed of, leaving 0 warrants remaining, according to the filing.
  • Separate disposal: 49,023 ordinary shares were also reported as disposed of (transaction code not accompanied by a date in the filing).
  • Indirect ownership: All reported ordinary shares are held indirectly through Heritage Assets SCSp.
  • Foreign private issuer exemption: The filing notes that transactions are exempt from Sections 16(b) and 16(c) of the Securities Exchange Act of 1934 due to Arqit Quantum's status as a foreign private issuer under Rule 3a12-3(b).

Lefebvre d'Ovidio Reports Warrant Exercise and Ownership Change at Arqit Quantum

According to the Form 4 filing, Manfredi Lefebvre d'Ovidio, identified as a Director of Arqit Quantum Inc., reported a transaction dated September 22, 2026, in which 4,600,000 Ordinary Share Purchase Warrants were exercised at a conversion or exercise price of $2.50. The filing states that each warrant entitles the holder to purchase one ARQQ ordinary share at the holder's election. The warrants had an expiration date of September 30, 2026, and carried a derivative security price of $0.

Following the reported exercise, the filing discloses that Lefebvre d'Ovidio beneficially owns 8,942,448 ordinary shares of Arqit Quantum Inc., held indirectly through Heritage Assets SCSp. Separately, the filing reports a disposal of 49,023 ordinary shares, though no transaction date, price, or transaction code is recorded alongside that line item in the filing. All ordinary share positions are reported as indirectly owned through Heritage Assets SCSp.

The filing further notes, in the Remarks section, that "due to the Issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Securities Exchange Act of 1934 (the 'Act'), the reporting person's transactions in the Issuer's securities are exempt from Sections 16(b) and 16(c) of the Act." The Form 4 was signed by Amir Heyat as Attorney-in-Fact on September 23, 2026.

What Was Disclosed

Director Manfredi Lefebvre d'Ovidio reported the exercise of 4,600,000 Ordinary Share Purchase Warrants at $2.50 in Arqit Quantum Inc. (NASDAQ:ARQQ) on September 22, 2026, resulting in indirect beneficial ownership of 8,942,448 ordinary shares through Heritage Assets SCSp.