| Arbour Living Holdings Limited | Macclesfield | 2026 |
| Arbour Lodge Limited | Wolverhampton | 1998 |
| Arbour Walk Ltd | Ashbourne | 2025 |
| Arbra Investment Management Ltd | London | 2024 |
| Arbra Limited | London | 2022 |
| Arbra Partners Ltd | London | 2023 |
| Arbra Proper Services Ltd | Edgware | 2024 |
| Arbra Wealth Management Ltd | London | 2023 |
| Arbridge Network Ltd | London | 2026 |
| Arbury Delights Ltd | Coventry | 2022 |
| Arbus Holdings Limited | Saxmundham | 2021 |
| Arbuthnot Banking Group PLC | London | 1985 |
| Arbuthnot Commercial Asset Based Lending Limited | London | 2017 |
| Arbuthnot Fund Managers Limited | London | 1919 |
| Arbuthnot Investments Limited | London | 1995 |
| Arbuthnot Latham & Co., Limited | London | 1964 |
| Arbuthnot Latham (Nominees) Limited | London | 1971 |
| Arbuthnot Limited | London | 2002 |
| Arbuthnot Properties Limited | London | 1995 |
| Arbuthnot Securities Limited | London | 2002 |
| Arbuthnot Specialist Finance Limited | London | 2017 |
| Arbuthnot Unit Trust Management Limited | London | 1980 |
| Arbutus Wealth Management (AWM) Ltd | Hertford | 2010 |
| Arbyd Investments Ltd | Ilford | 2021 |
| ARC & Cask Holdings Ltd | London | 2026 |
| ARC & Co Private Finance Ltd | Woking | 2009 |
| ARC 2005 Holdings Limited | Tunbridge Wells | 2025 |
| ARC Academy Holdings UK Limited | Pontypridd | 2017 |
| ARC Asset Holdings Ltd | Glasgow | 2026 |
| ARC Assist Ltd | Oldham | 2025 |
| ARC Broker Services Limited | Lincoln | 2018 |
| ARC Build Group Limited | Nottingham | 2015 |
| ARC Capital Group Ltd | Harrogate | 2022 |
| ARC Capital Holdings Ltd | London | 2024 |
| ARC Club Limited | London | 2022 |
| ARC Club Stratford Limited | London | 2024 |
| ARC Club Tottenham Hale Limited | London | 2024 |
| ARC Club Walthamstow Limited | London | 2024 |
| ARC Corporate Finance Brokers Ltd | Cardiff | 2018 |
| ARC Displays UK Group Ltd | Stratford-Upon-Avon | 2025 |
| ARC Eden Limited | Cumbria | 2004 |
| ARC Financial Consultancy Limited | Pinner | 2019 |
| ARC Financial Management Ltd | Hebburn | 2021 |
| ARC Group Holdings Limited | London | 2020 |
| ARC Hearing Holdings Ltd | Scarborough | 2023 |
| ARC Holding Group Limited | Liverpool | 2024 |
| ARC Housing Ltd | Bristol | 2020 |
| ARC Infinity Group Limited | Birmingham | 2026 |
| ARC Investment Group Holdings Ltd | London | 2026 |
| ARC Investment Group Limited | Twickenham | 2024 |
| ARC Investment Holdings Ltd | Leeds | 2021 |
| ARC Investment Services Limited | Newcastle Upon Tyne | 2019 |
| ARC Legal Assistance Limited | Colchester | 2003 |
| ARC LP (UK) Limited | Didcot | 1993 |
| ARC M1 Ltd | Weybridge | 2026 |
| ARC Metal Bending Group Limited | Tipton | 2020 |
| ARC Mortgage Solutions Ltd | Hamilton | 2018 |
| ARC Mortgages Limited | London | 2023 |
| ARC Operations Ltd | Glasgow | 2025 |
| ARC Pennant Limited | Llandegla | 2023 |
| ARC Project Finance Limited | Bournemouth | 2021 |
| ARC Projects Corporation Limited | London | 2025 |
| ARC South Wales Quarries Limited | Maidenhead | 1963 |
| ARC SS Ltd | Dunstable | 2023 |
| ARC Streaming Limited | Coleraine | 2025 |
| ARC Treasury Services Limited | London | 2023 |
| ARC Trustee Services Limited | Salford | 2016 |
| ARC Trustees Limited | Manchester | 2013 |
| ARC UK Financing Limited | London | 2018 |
| ARC UK Holdings Limited | Nottingham | 2015 |
| ARC UK Industrial Holdco 3 Limited | London | 2026 |
| ARC11 Ltd | Ruislip | 2023 |
| Arc:Mc Holdings Limited | Sutton | 2011 |
| Arca 888 Limited | Lymm | 2024 |
| Arca Bidco Limited | Portsmouth | 2014 |
| Arca Capital Ltd. | London | 2003 |
| Arca Financial Ltd | Bushey Heath | 2021 |
| Arca Group Limited | London | 2025 |
| Arca Holdco Limited | Portsmouth | 2014 |
| Arca Holdings Limited | London | 2024 |
| Arca Living Holdings Ltd | Birmingham | 2021 |
| Arca Midco Limited | Portsmouth | 2014 |
| Arca Mora Limited | London | 2022 |
| Arca Payments Company Limited | Halifax | 2020 |
| Arca Shipping Limited | Portsmouth | 2005 |
| Arca Topco Limited | Portsmouth | 2014 |
| Arcade Club Holdings Limited | Rossendale | 2019 |
| Arcade Group Ltd | Worthing | 2025 |
| Arcade London Group Ltd | London | 2025 |
| Arcades Galore Holdings Ltd | London | 2019 |
| Arcadia & Co Capital Ltd | Kington | 2025 |
| Arcadia Consulting (Holdco) Limited | London | 2022 |
| Arcadia Finance Ltd | Llanelli | 2026 |
| Arcadia Financial Services Ltd | Horley | 2016 |
| Arcadia Global UK Limited | London | 2021 |
| Arcadia Group Pension Trust Limited | London | 1938 |
| Arcadia Marshall Holdings Limited | Newport | 2024 |
| Arcadia Mews Holdings | Rugby | 2019 |
| Arcadia Solutions Ltd | Manchester | 2025 |
| Arcadia Travel and Marketing Limited | Keighley | 1981 |