Form 4 Filing for Arqit Quantum Inc.

This filing details transactions by Manfredi Lefebvre d'Ovidio, a director at Arqit Quantum Inc. (ARQQ), involving Business Combination Warrants. On June 15, 2026, 356 warrants were disposed of at a price of $1.40 per share, resulting in 18,974.48 warrants remaining. On June 16, 2026, an additional 428 warrants were disposed of at $1.60 per share, leaving 18,546.32 warrants. These transactions are exempt from Section 16(b) of the Act due to Arqit Quantum Inc. being a foreign private issuer. A reverse stock split was implemented on September 19, 2024, consolidating 25 shares into one. Each warrant is exercisable for 0.04 ordinary shares post-split, requiring the exercise of at least 25 warrants for one whole ordinary share at an aggregate exercise price of $287.50.