| Armara Group Ltd | London | 2025 |
| Armarge Limited | Poulton-Le-Fylde | 2015 |
| Armarine Services Limited | London | 2015 |
| Armasure Limited | Gosport | 2014 |
| Armcorp Limited | Glasgow | 2017 |
| Arme Services Ltd | Telford | 2023 |
| Armed Forces Community HQ CIC | Wigan | 2018 |
| Armenian Church Trust (UK) Limited | Brentford | 2010 |
| Armer Fit Limited | Enfield | 2014 |
| Armer Sound and Light Ltd | Dunstable | 2016 |
| Armev Limited | Bexley | 2018 |
| Armgods Ltd | Newry | 2024 |
| Armichi Ltd | Winchester | 2020 |
| Armina Group Ltd | London | 2023 |
| Arminius Partners Ltd | Cheshire | 2020 |
| Armir Ltd | London | 2021 |
| Armitage Cleaning Limited | West Yorkshire | 2003 |
| Armitage Law Services Ltd | London | 2024 |
| Armitage Road (Rugeley) Management Limited | Shrewsbury | 2006 |
| Armix Holdings Limited | Leicester | 2014 |
| Armley Amusements Limited | York | 2005 |
| Armley Beauty Lounge Limited | Leeds | 2025 |
| Armona Beauty Limited | Birmingham | 2018 |
| Armonia Group UK Ltd | London | 2024 |
| Armonia Limited | York | 2000 |
| Armonia Wellness and Beauty Ltd | London | 2025 |
| Armouk Ltd | Birmingham | 2025 |
| Armour Academy Ltd | Harrow | 2020 |
| Armour Brothers Locksmiths Ltd | London | 2017 |
| Armour Building & Refurbishment Ltd | Leigh On Sea | 2012 |
| Armour Environmental Services Limited | Dagenham | 2008 |
| Armour Fire Protection Limited | Huddersfield | 2025 |
| Armour Food Group Limited | Stockport | 2025 |
| Armours Security Services Ltd | Ilford | 2017 |
| Armourstore Limited | Ely | 2006 |
| Armourstore Self Storage Ltd | Ely | 2010 |
| Armourtech Consultancy Ltd | London | 2018 |
| Armrite Pro Clean Limited | Portsmouth | 2025 |
| Arms of Grace | Watford | 2010 |
| Armstrong and Fraser Funeral Directors Ltd | Louth | 2023 |
| Armstrong Appliances Ltd | London | 2013 |
| Armstrong Auctions Limited | Bangor | 2022 |
| Armstrong Aviation (Holdings) Limited | Long Eaton | 2023 |
| Armstrong Chase Limited | Stourbridge | 2021 |
| Armstrong Cuthbert Hairdressing Limited | Brentford | 2007 |
| Armstrong Fortescue Ltd | Eastbourne | 2017 |
| Armstrong Funeral Directors & Memorials Ltd | Omagh | 2021 |
| Armstrong Health and Wellness Limited | Swansea | 2017 |
| Armstrong Hifi Video Services Limited | | 1989 |
| Armstrong Holdings Northern Limited | Bishop Auckland | 2021 |
| Armstrong Rentals Limited | Omagh | 2015 |
| Armstrong Safety and Training Services Ltd | Sunderland | 2024 |
| Armstrong Siddeley Heritage Trust Ltd | Reading | 2013 |
| Armstrong Surveys Ltd | Wrexham | 2007 |
| Armstrong Walker Holdings Limited | Bristol | 2018 |
| Armstrong's Hairdressing & Barbering Ltd | Chippenham | 2023 |
| Armstrongs Funeral Service Limited | Bury St. Edmunds | 2005 |
| Armthorpe Carwash Doncaster Ltd | Doncaster | 2019 |
| Army of Christ Pentecostal Church Ltd | London | 2025 |
| Army of Christ Sanctuary Ltd | London | 2025 |
| Army of the END of Time CIC | London | 2025 |
| Armyne Ltd | Chesham | 2020 |
| ARN Consultant Ltd | Peterbrough | 2014 |
| ARN DEC Limited | London | 2022 |
| ARN Oldham Ltd | Oldham | 2014 |
| ARN Services (Essex) Limited | Basildon | 2019 |
| Arna Group Ltd | London | 2023 |
| Arnaut Collective Ltd | Brentwood | 2025 |
| Arncroach and Carnbee Community Development Trust | Anstruther | 2011 |
| Arndale Star Nails and Beauty Ltd | Manchester | 2023 |
| Arney Fender Katsalidis Limited | London | 2013 |
| Arng Limited | Saltash | 2025 |
| Arni Stars Services Ltd | London | 2022 |
| Arnia Services Ltd | Birmingham | 2026 |
| Arnison Heelis Trust Corporation Limited | Penrith | 2021 |
| Arnold & Calvert Limited | London | 2021 |
| Arnold and Hobbs Limited | Ashford | 2015 |
| Arnold Funeral Service Limited | Beaconsfield | 1993 |
| Arnold Securities Limited | Leeds | 1969 |
| Arnold TV Repairs Ltd | Nottingham | 2026 |
| Arnold's Aesthetics Ltd | Liverpool | 2021 |
| Arnos Grove Launderette Ltd | London | 2026 |
| Arnott and Wright Ltd | Falkirk | 2023 |
| Arnoulds Limited | Wymondham | 2025 |
| Arnside Services Ltd | Nottingham | 2025 |
| ARO Barber Ltd | Derby | 2022 |
| ARO Barber Wakefield Limited | Wakefield | 2025 |
| ARO Franchisees Limited | Emsworth | 2016 |
| ARO Linen Ltd | London | 2026 |
| ARO Supercut Ltd | Doncaster | 2024 |
| ARO Trading Ltd | Preston | 2019 |
| ARO X Barber Limited | Edinburgh | 2026 |
| Aro's Paving Ltd | Manchester | 2026 |
| ARO1 Ltd | Orpington | 2024 |
| ARO12 Ltd | Broxburn | 2026 |
| Arobase Services Ltd | Leicester | 2017 |
| Aroc Consulting Ltd | Sevenoaks | 2016 |
| Arogy Beauty and Holistic Therapies Ltd | Bracknell | 2025 |
| Arohra Community Interest Company | London | 2023 |
| AROJAFF2020 Limited | Pontefract | 2022 |