| ARK Salons Limited | Herts | 2014 |
| ARK Solutions Midlands Limited | Sutton Coldfield | 2024 |
| ARK UK Integrated Services Ltd | Croydon | 2021 |
| ARK, Home of God's Children Ministries | Aldershot | 2023 |
| Ark-I-Tec Limited | Bradford | 2011 |
| Arka Office Services Ltd. | Northolt | 2011 |
| Arka Original Funerals Limited | Haywards Heath | 2003 |
| Arka Salon Collective Ltd | York | 2025 |
| Arkaa Ltd | Surbiton | 2023 |
| Arkaa Services Limited | Sutton Coldfield | 2010 |
| Arkadata Ltd | Cardiff | 2021 |
| Arkadin Limited | London | 2021 |
| Arkan AL Benaa for Contracting Ltd | Manchester | 2021 |
| Arkan Alkemah Ltd | Edinburgh | 2024 |
| Arkan RAV Ltd | Luton | 2017 |
| Arkaufen Ltd | London | 2023 |
| Arkbar Developments Limited | Shrewsbury | 2021 |
| Arkbuildersuk Ltd | Ilford | 2022 |
| Arke Consultancy Ltd | Belfast | 2016 |
| Arkeera Limited | Cardiff | 2025 |
| Arkendale Group Ltd | Selby | 2022 |
| Arkenstone International Ltd. | London | 2022 |
| Arkhamconsultants.Com Limited | Birmingham | 2015 |
| Arkitekton Ltd | Ashford | 2019 |
| Arkle Capital Limited | Chichester | 2021 |
| Arkle Estates Limited | Chichester | 2015 |
| Arkle Holdings Limited | Chichester | 2015 |
| Arkle Management Limited | Swinton | 2025 |
| Arkle Partners Limited | Chichester | 2014 |
| Arkley Car Wash Ltd | Barnet | 2024 |
| Arkley Gardeners Ltd | Birmingham | 2025 |
| Arklow Cattery Limited | London | 1993 |
| Arklow Kennels Limited | London | 1964 |
| Arknod Ltd | Edinburgh | 2024 |
| Arková Ltd | Cardiff | 2025 |
| Arkrose Limited | London | 2019 |
| Arkwright Aviation Limited | Wallingford | 2022 |
| Arkwright DRY Cleaners Limited | Nottingham | 2011 |
| Arkwright Repair Shop Limited | Tansley | 2022 |
| Arlblack Enterprises Limited | Manchester | 2022 |
| Arlco Limited | Covent Garden | 2023 |
| Arlen Commercial Limited | Potters Bar | 2017 |
| Arlene (UK) Ltd | Ilford | 2008 |
| Arlene Conroy Limited | Dundee | 2016 |
| Arleo Biodiversity Limited | Reading | 2025 |
| Arleron Ltd | Slough | 2025 |
| Arlesey Tyres Ltd | Arlesey | 2019 |
| Arley & ST. Michael`S Community Centre | Coventry | 2008 |
| Arley House Estates Limited | Altrincham | 2025 |
| Arlington Carr Ltd | Leicester | 2012 |
| Arlington Cattery Ltd | Eastbourne | 2010 |
| Arlington Funeral Services Limited | Stoke-On-Trent | 2001 |
| Arlion Holdings Limited | London | 2023 |
| Arlion Ltd | Beaconsfield | 2023 |
| Arlo & Sage Grooming Ltd | Eastbourne | 2025 |
| Arlo Enterprises Ltd | London | 2015 |
| Arlo Exec Ltd | Aylesbury | 2021 |
| Arlo Fades Limited | Kingston Upon Thames | 2025 |
| Arlo Leisure Limited | Wynyard | 2017 |
| Arlo of London Ltd | Acton | 2007 |
| Arlo Palace Limited | Peterborough | 2026 |
| Arlo Services Limited | Southampton | 2014 |
| Arlos Adventures Dog Care Ltd | Bedford | 2024 |
| Arlot Limited | Walton-On-Thames | 2023 |
| Arlson Global Limited | Wellingborough | 2018 |
| Arlyhe Limited | Ringwood | 2025 |
| ARM Associates & Consultancy Limited | Cardiff | 2014 |
| ARM Beauty Ltd | Liverpool | 2022 |
| ARM Connect Ltd | London | 2025 |
| ARM Domestic Cleaning Limited | Hull | 2019 |
| ARM Euroimpex Ltd | Harrow | 2023 |
| ARM Locksmiths Limited | Hailsham | 2019 |
| ARM Mansfield Ltd | Walsall | 2018 |
| Arma UK Chapter | Hertford | 2012 |
| ARMA2022 Limited | Wakefield | 2023 |
| Armaa Services Ltd | Yell | 2026 |
| Armaa Services Shetland Ltd | Yell | 2024 |
| Armaan Air Travels Ltd | Bradford | 2022 |
| Armaan Media Ltd | Willenhall | 2018 |
| Armada Athletics Network CIC | Plymouth | 2013 |
| Armada Club Ltd | London | 2026 |
| Armada Contract Hire Limited | Wolverhampton | 2017 |
| Armada Electrical Ltd | Horley | 2023 |
| Armada Enterprises Limited | London | 1997 |
| Armada House Securities Limited | Sutton | 1992 |
| Armada Leisure Ltd | Longsight Road | 2022 |
| Armada Yacht Club Ltd | London | 2025 |
| Armadillo Associates Limited | Bristol | 1992 |
| Armadillo Limited | Altrincham | 1970 |
| Armadillo SEC Ltd | Macclesfield | 2016 |
| Armadillo Translation Limited | Hove | 2014 |
| Armagh City Vineyard Church | Richhill | 2017 |
| Armagh Nail & Spa Ltd | Belfast | 2026 |
| Armagh Nails & Beauty Ltd | Armagh | 2022 |
| Arman Watan Consultancy Ltd | Newham | 2024 |
| Armandi Ltd | London | 2021 |
| Armando Health Care Ltd | Leeds | 2019 |
| Armani's Tailor Limited | Scarborough | 2020 |
| Armani’S Tanning Limited | Ballynahinch | 2026 |
| Armanji Barbers Ltd | London | 2024 |