| Arifi Cleaning Ltd | Nuneaton | 2023 |
| Arihzans Kennels Limited | Hagley Stourbridge | 2021 |
| Arii Fades Ltd | Birmingham | 2025 |
| Arijan Limited | London | 2023 |
| Arik Consulting Limited | Pinner | 2025 |
| Arika Coaching Ltd | London | 2024 |
| Arika Face & Body N B Aesthetics Limited | Milton Keynes | 2025 |
| Arikson Group Limited | Birmingham | 2019 |
| Arilou Hair Ltd | Ayr | 2020 |
| Arin Barbers Ltd | Bathgate | 2024 |
| Arinola Ayodele UK Limited | Heywood | 2024 |
| Arinrima Ltd | London | 2025 |
| Arinze Studios Ltd | London | 2025 |
| Ario Holdings Limited | Ebbsfleet | 2024 |
| Ariola Music Limited | London | 1978 |
| Ariomaghwa Ladies Association UK Limited | Luton | 2015 |
| Ariomori Forest House Limited | London | 2019 |
| Arios Barber Limited | Newcastle Upon Tyne | 2022 |
| Aris Aesthetics Ltd | London | 2022 |
| Aris Consultancy Ltd | London | 2015 |
| Aris Consulting Ltd | Henley-In-Arden | 2023 |
| Aris Design & Management Ltd | Croydon | 2007 |
| Aris Distributor Ltd | Hampton | 2020 |
| Aris R. Ltd | Bury St. Edmunds | 2025 |
| Arisaig Community Trust | Arisaig | 2009 |
| Arisaig Sauna Ltd | Argyll | 2024 |
| Arise - Shine Your Light CIC | Buckhurst Hill | 2025 |
| Arise and Shine Christian Ministries (Manchester) Limited | Manchester | 2011 |
| Arise and Shine Evangelistic Association | London | 1995 |
| Arise and Shine South West Ltd | Torquay | 2023 |
| Arise Church Lincoln | Lincoln | 2001 |
| Arise Church Ltd. | Kingswinford | 2007 |
| Arise Fellowship Christian Church CIC | Croydon | 2023 |
| Arise Renewable Energy UK Limited | London | 2021 |
| Arise Shine Light CIC | Newport | 2025 |
| Arised International Ltd | Carcroft | 2019 |
| Arisen Capital Ltd | Bradford | 2026 |
| Arish Barber (NE) Ltd | Darlington | 2021 |
| Arish Barber Ltd | Holyhead | 2025 |
| Arish Barber Shop Ltd | Wareham | 2022 |
| Arising Cleaning East London Ltd | London | 2018 |
| Arising Solutions Limited | Harrow, | 2015 |
| Arista Hairdressing Ltd | Newport | 2021 |
| Arista IBC Limited | Hythe | 2024 |
| Aristocat Cleaning Limited | Liverpool | 2014 |
| Aristocats Pet Minding Limited | Morden | 2013 |
| Aristocrat Drycleaning Limited | London | 2008 |
| Aristocrate Investments Limited | Leicestershire | 1993 |
| Aristocratic Drycleaners Ltd | London | 2020 |
| Aristocrats Luxury Limited | London | 2019 |
| Aristocuts Limited | Dunstable | 2004 |
| Aristocutz Limited | Eastbourne | 2007 |
| Aristos Physiotherapy Ltd | Stewarton | 2021 |
| Aristotle Limited | Glasgow | 2018 |
| Aritma Barber Ltd | Horley | 2025 |
| Ariva Trading Limited | Handsworth Birmingham | 2022 |
| Arivon Limited | Birmingham | 2021 |
| Ariyo Hair Ltd | London | 2025 |
| Ariyoconnect Ltd. | London | 2013 |
| Ariz Haji Ltd | Peterborough | 2023 |
| Arizia Ltd | Farnham | 2023 |
| Arizona Hair Limited | Eastleigh | 2017 |
| Ariztech Ltd | Ware | 2026 |
| Ari’S Beauty Bar Limited | Leicester | 2025 |
| ARJ Fire Safety Ltd | Bromley Heath, Downend | 2006 |
| Arjan & Son's Ltd | London | 2014 |
| Arjan Quality Constructions Ltd | London | 2026 |
| Arjgent Dynamics Ltd | London | 2026 |
| Arjin & Brothers Ltd | Birmingham | 2018 |
| Arjin Power Ltd | Birmingham | 2025 |
| Arjj Skincare Ltd | Hounslow | 2023 |
| Arjm Promotions Limited | Whetstone | 2017 |
| Arjoi Ltd | Wolverhampton | 2018 |
| Arjun Global Ltd | London | 2013 |
| ARK & Ocean Ltd | London | 2024 |
| ARK Appliances Limited | Swansea | 2003 |
| ARK Bidco Limited | London | 2024 |
| ARK Bridal Limited | Carluke | 2025 |
| ARK Care Homes Limited | Bideford | 2003 |
| ARK Cmcs Limited | Leeds | 2021 |
| ARK Computer Repair Ltd | Fareham | 2020 |
| ARK Computer Solutions Ltd | York | 2015 |
| ARK Corporation (U.K.) Co Ltd | Chesham | 2011 |
| ARK Dog Walking Ltd | Blackburn | 2015 |
| ARK Establishment Ltd | Cardiff | 2019 |
| ARK Groundworks Ltd | Eastleigh | 2017 |
| ARK Hair and Beauty Ltd | Kingswinford | 2023 |
| ARK Hair Ltd | Hexham | 2024 |
| ARK Hairdressing Ltd | Bonnyrigg | 2022 |
| ARK Heating and Plumbing Ltd | Harlow | 2018 |
| ARK Infrastructure Ltd | Sale | 2005 |
| ARK Innovations Solutions Ltd | Epsom | 2026 |
| ARK Interiors Limited | Crawley | 2010 |
| ARK Invest Ltd | Smethwick | 2006 |
| ARK Kent Limited | Canterbury | 2017 |
| ARK of Gods Covenant Outreach Ministry International | Basingstoke | 2017 |
| ARK of the Covenant Prayer and Worship Tabernacle | Grays | 2008 |
| ARK of Victory | Leeds | 2010 |
| ARK Offshore International Ltd. | Great Yarmouth | 1993 |
| ARK Payroll UK Limited | London | 2020 |