Name of undertaking

Registered office

Domicile

% held

Arqit Limited

7th Floor, Nova North, 11 Bressenden Place, London, England, SW1E 5BY

U.K.

100

Arqit Inc.

1209 Orange Street, Wilmington, County of Newcastle, Delaware 19801

U.S.

100

Arqit LLC

1209 Orange Street, Wilmington, County of Newcastle, Delaware 19801

U.S.

100

Arqit Italia S.R.L

Via Delle Quattro Fontane, 20, 00184 Roma

Italy

100

Arqit Quantum Pty Ltd

Level 10, 171 Clarence Street, Sydney NSW 2000

Australia

100