| AR Electrics & Sons Limited | Pinner | 2021 |
| AR Fabrications UK Limited | Hayes | 2022 |
| AR Gems Ltd | London | 2024 |
| AR Graphics & Printing Solutions Ltd | Stoke-On-Trent | 2023 |
| AR Gulf Ltd | London | 2026 |
| AR Hometex Limited | Rochdale | 2022 |
| AR Industries Steelstrip Limited | Stockport | 2002 |
| AR Instrumed UK Ltd | Southsea | 2025 |
| AR Lancashire Ltd | Manchester | 2024 |
| AR Livestock Services Limited | Widnes | 2018 |
| AR Maintenance Ltd | Clevedon | 2023 |
| AR Paintworx Ltd | Birmingham | 2025 |
| AR Printers Ltd | London | 2025 |
| AR Renewables Ltd | Birtley | 2022 |
| AR Retail Solutions Ltd | Cardiff | 2022 |
| AR Simply Electrical Ltd | Stevenage | 2019 |
| AR Technical & Mechanical Services Limited | Birmingham | 2016 |
| AR Technik Limited | Solihull | 2026 |
| AR Thermosensors Ltd | Queenborough | 2022 |
| AR Tracks & Blinds Limited | Salisbury | 2018 |
| AR Truck & Tyre Ltd | Sleaford | 2026 |
| AR UK Beds Ltd | Dewsbury | 2026 |
| AR Welding & Motorsport Ltd | Retford | 2023 |
| AR Welding (NE) Ltd | Gateshead | 2025 |
| Ar&C Properties Ltd | Southampton | 2025 |
| Ar-Be-Da Services Ltd | Turriff | 2023 |
| Ar-Cnc Ltd | Oldham | 2025 |
| Ar-Control Systems Limited | Sittingbourne | 2017 |
| Ar-Fi Tech Ltd | London | 2019 |
| Ar-Mech Ltd | Cumbria | 1999 |
| Ar-Razaaq Holdings Ltd | London | 2021 |
| AR18 Limited | Chesham | 2003 |
| ARA Build & Design Services Ltd | Glasgow | 2025 |
| ARA Health Limited | Southampton | 2012 |
| ARA Hygiene Ltd | Ballymena | 2015 |
| ARA IDE Limited | Sheffield | 2022 |
| ARA Manufacturing Ltd | London | 2024 |
| Araam Health Ltd | Epsom | 2026 |
| Araarah Limited | Cambridge | 2025 |
| Arab Vision Ltd | Doncaster | 2023 |
| Arabella Blinds Ltd | Bolton | 2023 |
| Arabella Donn Limited | London | 2016 |
| Arabella Nuts & Confectionery Limited | Croydon | 2011 |
| Arabelle Services UK Limited | Rugby | 2002 |
| Arabia Powertec Ltd | Mildenhall | 2025 |
| Arabian Brewing Company UK Ltd | Reigate | 2023 |
| Arabian Coffee Limited | Sheffield | 2025 |
| Arabian Luxuries Ltd | London | 2025 |
| Arabian Musk London Limited | Chelmsford | 2023 |
| Arabian White Horse Trading UK Limited | London | 2025 |
| Arabica Espresso Services Limited | Hemel Hempstead | 2010 |
| Arabica Food Limited | London | 2018 |
| Arac Electrical Ltd | Brigg | 2026 |
| Aracary Limited | London | 2019 |
| Arach Ltd | Perth | 2012 |
| Aracom Industries Limited | Newmarket | 2021 |
| Aracya Limited | Stafford | 2024 |
| Arada Limited | Axminster | 1988 |
| Araghi Ltd | London | 2025 |
| Aragrove Limited | Wadhurst | 1993 |
| Arahara Ltd | London | 2025 |
| Arako for OIL Manufacturing and Production Ltd | Manchester | 2026 |
| Aral Bicycle Ltd | Guildford | 2026 |
| Arality E-Vents Limited | Gravesend | 2020 |
| Arall Ltd | London | 2020 |
| Aramco Chemicals Limited | Leeds | 2020 |
| Aramec Limited | Blackwood | 2007 |
| Aramia Fashions Ltd | London | 2018 |
| Araminta Campbell Limited | South Queensferry | 2016 |
| Aramis Rugby Ltd | South Molton | 2013 |
| Aran Bakery Ltd | Dunkeld | 2017 |
| Aran Hufen IA Ltd | Bala | 2023 |
| Aran Road Construction Limited | Oldham | 2016 |
| Arana Coffee Ltd | London | 2025 |
| Arangaranga UK Ltd | London | 2021 |
| Aranha Limited | Cumbria | 2006 |
| Arapina Bakery Limited | London | 2016 |
| Araprint Limited | Solihull | 1988 |
| Ararateam Online Ltd | London | 2025 |
| Ararich Limited | London | 2025 |
| Aras Contracting Ltd | London | 2018 |
| Aras Enterprises Limited | London | 2025 |
| Aras Patisserie Ltd | London | 2026 |
| Aras Tailoring Limited | Newcastle Upon Tyne | 2024 |
| Aras Vogue Ltd | London | 2026 |
| Arash Motor Company Limited | Newmarket | 2000 |
| Arasys Perfector Holdings Limited | Verwood | 2001 |
| Arathy Jewellery Ltd | Hayes | 2025 |
| Aratsh Ltd | Cardiff | 2024 |
| Aravind Automobiles Ltd | London | 2021 |
| Aravon Global Limited | London | 2026 |
| Araw Limited | London | 2022 |
| ARAY2 Limited | Wembley | 2019 |
| Araña London Ltd | Aberdeen | 2026 |
| ARB Automation Limited | Henlow | 2008 |
| ARB Grain Services Ltd | Northallerton | 2026 |
| ARB Microtech Limited | Liss | 2022 |
| ARB Worx Engineering Ltd | Hemel Hempstead | 2023 |
| Arba Store Ltd | Coventry | 2025 |
| Arbab Group Ltd | Northolt | 2020 |