ARQQ

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.

SEC source: 0001104659-26-054870 · tm2613491-1_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: 26,142.92

Underlying: Ordinary Shares · 91 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.

SEC source: 0001104659-26-052879 · tm2613228-1_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: 26,234.12

Underlying: Ordinary Shares · 967 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 655,853 Business Combination Warrants, which, if exercised in full, would be equivalent to 26,234.12 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 655,853 Business Combination Warrants, which, if exercised in full, would be equivalent to 26,234.12 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-051483 · tm2612984-1_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: 27,200.84

Underlying: Ordinary Shares · 421 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 680,021 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,200.84 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 680,021 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,200.84 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-051483 · tm2612984-1_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: 27,622.16

Underlying: Ordinary Shares · 41 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 680,021 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,200.84 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 680,021 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,200.84 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-049428 · tm2612698-1_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: 27,663.28

Underlying: Ordinary Shares · 205 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 691,582 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,663.28 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 691,582 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,663.28 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-049428 · tm2612698-1_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: 27,868.64

Underlying: Ordinary Shares · 182 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 691,582 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,663.28 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 691,582 Business Combination Warrants, which, if exercised in full, would be equivalent to 27,663.28 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-047682 · tm2612473-1_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: 28,050.8

Underlying: Ordinary Shares · 381 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 701,270 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,050.8 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 701,270 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,050.8 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-047682 · tm2612473-1_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: 28,432.2

Underlying: Ordinary Shares · 103 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 701,270 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,050.8 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 701,270 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,050.8 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-045995 · tm2612253-1_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: 28,535.04

Underlying: Ordinary Shares · 307 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 713,376 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,535.04 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 713,376 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,535.04 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001859690-26-000085 · form4.xml · derivative · entry 3

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 3,066 shares

Expires 2031-03-01

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_date: Each Employee Share Option can be exercised at any time after vesting, at the holder's election, to purchase one ARQQ ordinary share.

SEC source: 0001859690-26-000085 · form4.xml · nonDerivative · entry 2

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,238

SEC source: 0001859690-26-000085 · form4.xml · nonDerivative · entry 1

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,673

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.

SEC source: 0001859690-26-000113 · form4.xml · derivative · entry 2

Bers Jennifer · CIK 0002119424 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,821

Underlying: Ordinary Shares · 15,000 shares

Expires not disclosed

F2 · derivative.exercise_price: The RSUs convert into ARQQ ordinary shares on a one-for-one basis. RSUs vest within the same quarter.

F2 · derivative.exercise_date: The RSUs convert into ARQQ ordinary shares on a one-for-one basis. RSUs vest within the same quarter.

F2 · derivative.expiration_date: The RSUs convert into ARQQ ordinary shares on a one-for-one basis. RSUs vest within the same quarter.

SEC source: 0001104659-26-045995 · tm2612253-1_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: 28,841.8

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 713,376 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,535.04 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 713,376 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,535.04 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-044898 · tm2612062-1_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: 28,992.8

Underlying: Ordinary Shares · 159 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 724,820 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,992.8 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 724,820 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,992.8 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001104659-26-044898 · tm2612062-1_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: 29,151.84

Underlying: Ordinary Shares · 713 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 724,820 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,992.8 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 724,820 Business Combination Warrants, which, if exercised in full, would be equivalent to 28,992.8 ARQQ ordinary shares on a post-reverse stock split basis.

SEC source: 0001859690-26-000067 · form4.xml · nonDerivative · entry 1

Leaver Andrew · CIK 0002035890 · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,751

SEC source: 0001859690-26-000062 · form4.xml · nonDerivative · entry 5

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,607

SEC source: 0001859690-26-000059 · form4.xml · nonDerivative · entry 5

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,916

SEC source: 0001859690-26-000064 · form4.xml · nonDerivative · entry 5

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,963

SEC source: 0001859690-26-000061 · form4.xml · nonDerivative · entry 5

Ritchie Garth · CIK 0001840684 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,800

SEC source: 0001859690-26-000060 · form4.xml · nonDerivative · entry 3

Wilder Ben Simon · CIK 0002101275 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,018.47

SEC source: 0001859690-26-000058 · form4.xml · derivative · entry 2

Leaver Andrew · CIK 0002035890 · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 218,750

Underlying: Ordinary Shares · 15,625 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.

F2 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028, and January 1, April 1, July 1, and October 1, 2029.

F2 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028, and January 1, April 1, July 1, and October 1, 2029.

SEC source: 0001859690-26-000058 · form4.xml · nonDerivative · entry 1

Leaver Andrew · CIK 0002035890 · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,346

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.

SEC source: 0001859690-26-000062 · form4.xml · derivative · entry 9

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,240

Underlying: Ordinary Shares · 824 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.

F5 · derivative.exercise_date: 824 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

F5 · derivative.expiration_date: 824 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

SEC source: 0001859690-26-000062 · form4.xml · derivative · entry 8

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102

Underlying: Ordinary Shares · 104 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.

F4 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.

F4 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.

SEC source: 0001859690-26-000062 · form4.xml · derivative · entry 7

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,011

Underlying: Ordinary Shares · 403 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.

F3 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.

F3 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.

SEC source: 0001859690-26-000062 · form4.xml · derivative · entry 6

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,495

Underlying: Ordinary Shares · 2,083 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.

F2 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

F2 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

SEC source: 0001859690-26-000062 · form4.xml · nonDerivative · entry 4

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,316

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.

SEC source: 0001859690-26-000062 · form4.xml · nonDerivative · entry 3

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,492

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.

SEC source: 0001859690-26-000062 · form4.xml · nonDerivative · entry 2

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,388

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.

SEC source: 0001859690-26-000062 · form4.xml · nonDerivative · entry 1

Pointon Nicholas · CIK 0001967201 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,305

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.

SEC source: 0001859690-26-000059 · form4.xml · derivative · entry 9

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,232

Underlying: Ordinary Shares · 448 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.

F5 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.

F5 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.

SEC source: 0001859690-26-000059 · form4.xml · derivative · entry 8

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,155

Underlying: Ordinary Shares · 916 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.

F4 · derivative.exercise_date: 916 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

F4 · derivative.expiration_date: 916 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

SEC source: 0001859690-26-000059 · form4.xml · derivative · entry 7

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 110

Underlying: Ordinary Shares · 116 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.

F3 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.

F3 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.

SEC source: 0001859690-26-000059 · form4.xml · derivative · entry 6

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,495

Underlying: Ordinary Shares · 2,083 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.

F2 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

F2 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

SEC source: 0001859690-26-000059 · form4.xml · nonDerivative · entry 4

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,706

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.

SEC source: 0001859690-26-000059 · form4.xml · nonDerivative · entry 3

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,790

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.

SEC source: 0001859690-26-000059 · form4.xml · nonDerivative · entry 2

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,342

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.

SEC source: 0001859690-26-000059 · form4.xml · nonDerivative · entry 1

Willcocks Patrick · CIK 0001967211 · General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,226

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.

SEC source: 0001859690-26-000064 · form4.xml · derivative · entry 9

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,357

Underlying: Ordinary Shares · 472 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.

F5 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.

F5 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027.

SEC source: 0001859690-26-000064 · form4.xml · derivative · entry 8

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,655

Underlying: Ordinary Shares · 966 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.

F4 · derivative.exercise_date: 966 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

F4 · derivative.expiration_date: 966 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

SEC source: 0001859690-26-000064 · form4.xml · derivative · entry 7

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 119

Underlying: Ordinary Shares · 122 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.

F3 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.

F3 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, and July 1, 2026.

SEC source: 0001859690-26-000064 · form4.xml · derivative · entry 6

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,996

Underlying: Ordinary Shares · 1,666 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.

F2 · derivative.exercise_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

F2 · derivative.expiration_date: The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

SEC source: 0001859690-26-000064 · form4.xml · nonDerivative · entry 4

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,595

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.

SEC source: 0001859690-26-000064 · form4.xml · nonDerivative · entry 3

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,123

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.

SEC source: 0001859690-26-000064 · form4.xml · nonDerivative · entry 2

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,157

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.

SEC source: 0001859690-26-000064 · form4.xml · nonDerivative · entry 1

Feenan Paul · CIK 0001967068 · Chief Revenue Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,035

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.

SEC source: 0001859690-26-000065 · form4.xml · derivative · entry 8

Calabria Carlo · CIK 0001863192 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,499

Underlying: Ordinary Shares · 501 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.

F5 · derivative.exercise_date: 501 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

F5 · derivative.expiration_date: 501 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.