Lefebvre d'Ovidio Manfredi

SEC source: 0001859690-26-000142 · form4.xml · nonDerivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,851

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

SEC source: 0001859690-26-000142 · form4.xml · nonDerivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,801

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

SEC source: 0001104659-26-080395 · tm2619693-1_4seq1.xml · derivative · entry 3

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 14,986.76

Underlying: Ordinary Shares · 154 shares

Expires 2026-09-03

F3 · derivative.exercise_price: On September 19, 2024, the Issuer announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 369,792 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,791.68 ARQQ ordinary shares on a post-reverse stock split basis.

F4 · price: The price reported is a weighted average price. The Business Combination Warrants were sold in multiple transactions at prices ranging from $1.22 to $1.79 per Business Combination Warrant, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Commission, upon request, full information regarding the number of Business Combination Warrants sold at each separate price within the range set forth in this footnote.

F3 · derivative.exercise_date: On September 19, 2024, the Issuer announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 369,792 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,791.68 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-080395 · tm2619693-1_4seq1.xml · nonDerivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 4,374,870

F1 · price: The price reported is a weighted average price. The Ordinary Shares were sold in multiple transactions at prices ranging from $30.00 to $30.29 per Ordinary Share, inclusive. The reporting person undertakes to provide to Arqit Quantum Inc. (the "Issuer") (ARQQ), any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "Commission"), upon request, full information regarding the number of Ordinary Shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001104659-26-079321 · tm2619435-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 14,986.76

Underlying: Ordinary Shares · 113 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-079321 · tm2619435-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 15,099.32

Underlying: Ordinary Shares · 317 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 374,669 Business Combination Warrants, which, if exercised in full, would be equivalent to 14,986.76 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-078243 · tm2619087-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 15,416.08

Underlying: Ordinary Shares · 455 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 385,402 Business Combination Warrants, which, if exercised in full, would be equivalent to 15,416.08 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 385,402 Business Combination Warrants, which, if exercised in full, would be equivalent to 15,416.08 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-078243 · tm2619087-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 15,871.28

Underlying: Ordinary Shares · 659 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 385,402 Business Combination Warrants, which, if exercised in full, would be equivalent to 15,416.08 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 385,402 Business Combination Warrants, which, if exercised in full, would be equivalent to 15,416.08 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-077300 · tm2618867-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 16,530

Underlying: Ordinary Shares · 492 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 413,250 Business Combination Warrants, which, if exercised in full, would be equivalent to 16,530.00 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 413,250 Business Combination Warrants, which, if exercised in full, would be equivalent to 16,530.00 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-077300 · tm2618867-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 17,021.76

Underlying: Ordinary Shares · 120 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 413,250 Business Combination Warrants, which, if exercised in full, would be equivalent to 16,530.00 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 413,250 Business Combination Warrants, which, if exercised in full, would be equivalent to 16,530.00 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-076365 · tm2618452-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 17,141.76

Underlying: Ordinary Shares · 524 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 428,544 Business Combination Warrants, which, if exercised in full, would be equivalent to 17,141.76 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 428,544 Business Combination Warrants, which, if exercised in full, would be equivalent to 17,141.76 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-076365 · tm2618452-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 17,666.16

Underlying: Ordinary Shares · 880 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 428,544 Business Combination Warrants, which, if exercised in full, would be equivalent to 17,141.76 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 428,544 Business Combination Warrants, which, if exercised in full, would be equivalent to 17,141.76 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-075124 · tm2618176-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 18,546.32

Underlying: Ordinary Shares · 428 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 463,658 Business Combination Warrants, which, if exercised in full, would be equivalent to 18,546.32 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 463,658 Business Combination Warrants, which, if exercised in full, would be equivalent to 18,546.32 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-075124 · tm2618176-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 18,974.48

Underlying: Ordinary Shares · 356 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 463,658 Business Combination Warrants, which, if exercised in full, would be equivalent to 18,546.32 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 463,658 Business Combination Warrants, which, if exercised in full, would be equivalent to 18,546.32 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-074020 · tm2617965-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 19,330.48

Underlying: Ordinary Shares · 687 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 483,262 Business Combination Warrants, which, if exercised in full, would be equivalent to 19,330.48 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 483,262 Business Combination Warrants, which, if exercised in full, would be equivalent to 19,330.48 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-074020 · tm2617965-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 20,017.32

Underlying: Ordinary Shares · 841 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 483,262 Business Combination Warrants, which, if exercised in full, would be equivalent to 19,330.48 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 483,262 Business Combination Warrants, which, if exercised in full, would be equivalent to 19,330.48 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-072928 · tm2617682-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 20,858.04

Underlying: Ordinary Shares · 62 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 521,451 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,858.04 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 521,451 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,858.04 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-072928 · tm2617682-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 20,919.68

Underlying: Ordinary Shares · 52 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 521,451 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,858.04 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 521,451 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,858.04 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-071828 · tm2617338-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 20,971.32

Underlying: Ordinary Shares · 18 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 524,283 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,971.32 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 524,283 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,971.32 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-071828 · tm2617338-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 20,989.36

Underlying: Ordinary Shares · 156 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 524,283 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,971.32 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 524,283 Business Combination Warrants, which, if exercised in full, would be equivalent to 20,971.32 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-070965 · tm2617008-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 21,145.36

Underlying: Ordinary Shares · 124 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 528,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,145.36 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 528,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,145.36 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-070965 · tm2617008-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 21,269.36

Underlying: Ordinary Shares · 116 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 528,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,145.36 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 528,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,145.36 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-070094 · tm2616813-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 21,385.36

Underlying: Ordinary Shares · 132 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 534,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,385.36 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 534,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,385.36 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-070094 · tm2616813-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 21,517.36

Underlying: Ordinary Shares · 106 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 534,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,385.36 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 534,634 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,385.36 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-068902 · tm2616532-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 21,623.52

Underlying: Ordinary Shares · 227 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 540,588 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,623.52 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 540,588 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,623.52 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-068902 · tm2616532-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 21,850.64

Underlying: Ordinary Shares · 150 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 540,588 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,623.52 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 540,588 Business Combination Warrants, which, if exercised in full, would be equivalent to 21,623.52 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-067471 · tm2615892-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 22,000.52

Underlying: Ordinary Shares · 152 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 550,013 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,000.52 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 550,013 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,000.52 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-067471 · tm2615892-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 22,152.52

Underlying: Ordinary Shares · 151 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 550,013 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,000.52 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 550,013 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,000.52 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-066253 · tm2615661-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 22,303.36

Underlying: Ordinary Shares · 1,001 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 557,584 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,303.36 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 557,584 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,303.36 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-066253 · tm2615661-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 23,304.8

Underlying: Ordinary Shares · 787 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 557,584 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,303.36 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 557,584 Business Combination Warrants, which, if exercised in full, would be equivalent to 22,303.36 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-065136 · tm2615339-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,092.24

Underlying: Ordinary Shares · 72 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 602,306 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,092.24 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 602,306 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,092.24 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-065136 · tm2615339-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,164.24

Underlying: Ordinary Shares · 116 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 602,306 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,092.24 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 602,306 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,092.24 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-063814 · tm2615099d1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,280.24

Underlying: Ordinary Shares · 106 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 607,006 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,280.24 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 607,006 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,280.24 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-063814 · tm2615099d1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,386.56

Underlying: Ordinary Shares · 110 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 607,006 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,280.24 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 607,006 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,280.24 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-062503 · tm2614789-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,496.52

Underlying: Ordinary Shares · 47 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 612,413 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,496.52 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 612,413 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,496.52 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-062503 · tm2614789-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,543.56

Underlying: Ordinary Shares · 80 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 612,413 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,496.52 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 612,413 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,496.52 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-060231 · tm2614511-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,623.88

Underlying: Ordinary Shares · 13 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 615,597 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,623.88 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 615,597 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,623.88 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-059371 · tm2614374-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,636.44

Underlying: Ordinary Shares · 112 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 615,911 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,636.44 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 615,911 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,636.44 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-059371 · tm2614374-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,748.8

Underlying: Ordinary Shares · 181 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 615,911 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,636.44 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 615,911 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,636.44 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001859690-26-000081 · form4.xml · derivative · entry 7

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 1,082 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.exercise_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.expiration_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

SEC source: 0001859690-26-000081 · form4.xml · derivative · entry 6

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,082

Underlying: Ordinary Shares · 1,082 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.exercise_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.expiration_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

SEC source: 0001859690-26-000081 · form4.xml · nonDerivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,217

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

SEC source: 0001104659-26-057902 · tm2614075-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,929.96

Underlying: Ordinary Shares · 11 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 623,249 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,929.96 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 623,249 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,929.96 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001859690-26-000081 · form4.xml · derivative · entry 5

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 1,509 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.exercise_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.expiration_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

SEC source: 0001859690-26-000081 · form4.xml · derivative · entry 4

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,509

Underlying: Ordinary Shares · 1,509 shares

Expires not disclosed

F1 · derivative.exercise_price: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.exercise_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

F1 · derivative.expiration_date: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

SEC source: 0001859690-26-000081 · form4.xml · nonDerivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,135

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested immediately on the date of grant.

SEC source: 0001104659-26-057902 · tm2614075-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 24,941.28

Underlying: Ordinary Shares · 404 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 623,249 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,929.96 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 623,249 Business Combination Warrants, which, if exercised in full, would be equivalent to 24,929.96 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-056238 · tm2613750-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 25,345.2

Underlying: Ordinary Shares · 68 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 633,630 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,345.20 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 633,630 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,345.20 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-056238 · tm2613750-1_4seq1.xml · derivative · entry 1

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 25,413.04

Underlying: Ordinary Shares · 328 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 633,630 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,345.20 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 633,630 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,345.20 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-054870 · tm2613491-1_4seq1.xml · derivative · entry 2

Lefebvre d'Ovidio Manfredi · CIK 0001840678 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Beneficially owned through Heritage Assets SCSp

Disclosed balance after: 25,741.32

Underlying: Ordinary Shares · 402 shares

Expires 2026-09-03

F1 · derivative.exercise_price: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 643,533 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,741.32 ARQQ ordinary shares on a post-reverse stock split basis.

F1 · derivative.exercise_date: On September 19, 2024, Arqit Quantum Inc. (ARQQ) announced the implementation of a reverse stock split whereby every 25 outstanding ARQQ ordinary shares were consolidated into one ordinary share, par value $0.0025 per share. Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share on a post-reverse stock split basis, and cannot be exercised for fractional shares. Accordingly, on a post-reverse stock split basis holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 643,533 Business Combination Warrants, which, if exercised in full, would be equivalent to 25,741.32 ARQQ ordinary shares on a post-reverse stock split basis.