| Arrest Holdings Limited | Glasgow | 2021 |
| Arrichardson Limited | London | 2025 |
| Arrida Financial Services Ltd | Coalville | 2026 |
| Arringford Limited | London | 1996 |
| Arris Finance Limited | Harrow | 2025 |
| Arriva Finance Lease Limited | Sunderland | 1972 |
| Arriva Group Limited | Gloucester | 1998 |
| Arriva Holdco Limited | Sunderland | 2023 |
| Arriva Holdings Limited | Gloucester | 2009 |
| Arriva International Group Limited | Sunderland | 2023 |
| Arriva International Holdings Limited | London | 2023 |
| Arriva London Pension Scheme Trustee Limited | Sunderland | 2019 |
| Arriva Midco Limited | Sunderland | 2023 |
| Arrize Xtech UK Limited | Oxford | 2022 |
| Arrk Product Development Group Limited | Gloucester | 1988 |
| Arro Associates Unlimited | Chester | 2024 |
| Arrokoth Ltd | London | 2024 |
| Arroll Holdings Limited | Belfast | 2021 |
| Arroum Group Holdings Ltd | Birmingham | 2024 |
| Arrow Acquisition Company Limited | London | 2024 |
| Arrow Acquisitionco Limited | London | 2026 |
| Arrow Bidco Limited | London | 2010 |
| Arrow Business Comms (UK) Limited | Liverpool | 2019 |
| Arrow Business Telecoms Limited | Liverpool | 2019 |
| Arrow Capital Management Ltd | South Croydon | 2025 |
| Arrow Claims Management Ltd | London | 2025 |
| Arrow Commercial Holdings Limited | Huddersfield | 2018 |
| Arrow Communications Group Limited | Liverpool | 2019 |
| Arrow Communications Holdings Limited | Liverpool | 2019 |
| Arrow Companies Ltd | Poole | 2022 |
| Arrow Contracting Ltd | Rotherham | 2017 |
| Arrow Driving Group Ltd | Hull | 2015 |
| Arrow Electronics Limited | Harlow | 1996 |
| Arrow Energy Markets (Holdings) Limited | London | 2023 |
| Arrow Fortune Limited | Cardiff | 2024 |
| Arrow Glasgow Holdings Limited | London | 2019 |
| Arrow Global Accounts Management Limited | Manchester | 2005 |
| Arrow Global Birch Holdings Limited | Manchester | 2022 |
| Arrow Global Europe Limited | Manchester | 2014 |
| Arrow Global European Service Company Limited | Manchester | 2022 |
| Arrow Global Group Limited | Manchester | 2013 |
| Arrow Global Investments Holdings Limited | Manchester | 2008 |
| Arrow Global Luna Limited | Manchester | 2014 |
| Arrow Global MGA UK Holding Limited | Manchester | 2026 |
| Arrow Global One Limited | Manchester | 2013 |
| Arrow Global Portugal Investments Limited | Manchester | 2014 |
| Arrow Global Portugal Limited | Manchester | 2010 |
| Arrow Global Receivables Management Limited | Manchester | 2006 |
| Arrow Group Holdings Ltd | London | 2025 |
| Arrow Holdco Limited | London | 2026 |
| Arrow Holdings Ltd | Lowestoft | 2015 |
| Arrow Homes (Yorkshire) Ltd | Birmingham | 2020 |
| Arrow I Limited | London | 2020 |
| Arrow II Limited | London | 2021 |
| Arrow III Limited | London | 2021 |
| Arrow IV Limited | London | 2022 |
| Arrow Midco I Limited | London | 2026 |
| Arrow Midco II Limited | London | 2026 |
| Arrow Midco Limited | London | 2024 |
| Arrow Mortgage Solutions Ltd | Brighton | 2020 |
| Arrow Mortgages Ltd | Bridgend | 2023 |
| Arrow Professional Services Limited | Market Harborough | 2006 |
| Arrow Property Developer Ltd | London | 2026 |
| Arrow Reit Investment Limited | London | 2023 |
| Arrow Reit Master Limited | London | 2023 |
| Arrow Risk Management Limited | London | 2020 |
| Arrow Shipping and Energy Limited | London | 2018 |
| Arrow Topco Limited | London | 2024 |
| Arrow UK Holdings Limited | Smethwick | 2020 |
| Arrow UK Property Holdings Limited | London | 2022 |
| Arrow Underwriting Agency Limited | London | 2017 |
| Arrow V Limited | London | 2022 |
| Arrowcruit Holdings Limited | Billingham | 2010 |
| Arrowe Financial Limited | Wirral | 2013 |
| Arrowfield Capital Nominees Ltd | Oxford | 2019 |
| Arrowforce Limited | Staines | 1999 |
| Arrowgrass Capital Services UK Limited | London | 2007 |
| Arrowhead Data Services Limited | London | 2025 |
| Arrowhead Equity Ltd | Buckingham | 2022 |
| Arrowhead Financial Ltd | Airdrie | 2021 |
| Arrowmark International Limited | Beaconsfield | 2019 |
| Arrows International Limited | Withington | 1986 |
| Arrowscroft Ltd | Crewe | 2011 |
| Arrowsmith Consultants Limited | Maidstone | 2016 |
| Arrvic Holdings Limited | Huntingdon | 2023 |
| ARS Actuarial Ltd | Wimborne | 2024 |
| ARS Assets Holdings Ltd | Cambridge | 2019 |
| ARS Beheer Limited | Taunton | 2026 |
| ARS Capital Limited | London | 2014 |
| ARS Equities Ltd | London | 2025 |
| ARS Properties & Travel Ltd | London | 2018 |
| Arsa Services Ltd | Ealing | 2025 |
| Arsb Ltd | Luton | 2023 |
| Arscott Square Limited | London | 2023 |
| Arsenal (AFC Holdings) Limited | London | 2005 |
| Arsenal Securities Limited | London | 2005 |
| Arsenale Group UK Limited | London | 2026 |
| Arsha Holdings Limited | Chesterfield | 2026 |
| Arshad Holdings Group Ltd | Sheffield | 2025 |
| Arshad Holdings Limited | Bradford | 2025 |