| Arch 76 | London | 2013 |
| Arch and Align Ltd | Doncaster | 2025 |
| Arch and Enhance Ltd | London | 2026 |
| Arch Arena Design Ltd | London | 2024 |
| Arch Beauty Ltd | Ashford | 2020 |
| Arch Consultants Ltd | Leeds | 2018 |
| Arch Cosmetics Ltd | Chatham | 2024 |
| Arch Define UK Limited | Birmingham | 2024 |
| Arch Dental Ltd | Manchester | 2019 |
| Arch EM SA Holdco Limited | London | 2020 |
| Arch Emerging Markets Partners Limited | London | 2018 |
| Arch Energy Business Investments Ltd | Birmingham | 2024 |
| Arch Engineering Design Limited | St. Asaph | 2015 |
| Arch N Blink Ltd | London | 2025 |
| Arch Organic Ltd | London | 2025 |
| Arch Podiatry Ltd | Brighton | 2020 |
| Arch Property Management Ltd | Southampton | 2010 |
| Arch Rival Brows Ltd | Skelmersdale | 2020 |
| Arch Serve Limited | Swindon | 2013 |
| Arch Shoreditch Ltd | St. Albans | 2018 |
| Arch the Agency Limited | London | 2022 |
| Arch UK Consult Ltd | Milton Keynes | 2021 |
| Arch Under the Bridge Limited | Liverpool | 1998 |
| Archaeological Management Solutions Limited | York | 2016 |
| Archagelos Limited | London | 1998 |
| Archange Lebrun Trust Limited | London | 2001 |
| Archangel (UK) Limited | Croydon | 2002 |
| Archangel Consultants Limited | Weybridge | 2022 |
| Archangel Corporation Limited | Croydon | 2010 |
| Archangel Funerals Ltd | London | 2023 |
| Archangel Michael | London | 2010 |
| Archangel Security and Consultancy Limited | Dumfries | 2022 |
| Archbishop Porter Past Students' Association United Kingdom (Appsa UK) | London | 2026 |
| Archbishop Rowan Williams Hermitage Trust Property Ltd | Liskeard | 2013 |
| Archbridge Commerce Limited | Hungerford | 2022 |
| Archbuild Limited | London | 1985 |
| Archdale EMW Ltd | Mold | 2015 |
| Archdiocesan Parish Centres Management Company Limited | Liverpool | 1997 |
| Arche DE L'Alliance Limited | Brentford | 2019 |
| Archer Clinical Ltd | Sheffield | 2019 |
| Archer Enterprises Limited | Stratford-Upon-Avon | 2025 |
| Archer Express Limited | Sevenoaks | 2018 |
| Archer Knight (Holdings) Limited | Aberdeen | 2016 |
| Archer Knight Consultancy Limited | Aberdeen | 2018 |
| Archer Knight Market Intelligence Limited | Aberdeen | 2018 |
| Archer Sports Management Ltd | Weybridge | 2015 |
| Archerfield Properties Ltd. | Auchterarder | 2018 |
| Archers Antique Restorations Limited | Guildford | 2026 |
| Archers Garden Rooms Ltd | Glasgow | 2018 |
| Archers Marquees Ltd | Bath | 2010 |
| Archers Pest Control Ltd | Maldon | 2019 |
| Archers Television Service Ltd. | Kent | 1992 |
| Arches Blow DRY Bar Limited | Lisburn | 2012 |
| Arches Engineering Ltd | London | 2008 |
| Arches Local CIC | Chatham | 2022 |
| Arches Training Limited | Windsor | 2017 |
| Archetypal Design Ltd | Farnham | 2013 |
| Archfield Consulting Limited | Bristol | 2025 |
| Archfit Beauty by Rabia Ehsan Ltd | Birmingham | 2022 |
| Archfit Limited | Birmingham | 2014 |
| Archgate Developments Limited | London | 2010 |
| Archglebe Ltd | Harrow | 2001 |
| Archi Capital Limited | London | 2024 |
| Archibald GD Limited | Verwood | 2005 |
| Archibald Macrae Limited | Stornoway | 2016 |
| Archibald Trading Limited | Portrush | 2022 |
| Archiclad DFI (UK) Limited | London | 2022 |
| Archie Capital Ltd | Rotherham | 2021 |
| Archie Rogers Limited | Cambridge | 2009 |
| Archies Gallery Limited | Chesham | 2019 |
| Archieshair Ltd | Lewes | 2025 |
| Archietech Limited | London | 2020 |
| Archijss Ltd | Peterborough | 2022 |
| Archimar Ltd | London | 2016 |
| Archimotect Beauty Ltd | London | 2025 |
| Archipelago Yachting Limited | London | 2013 |
| Archipelo Limited | Hassocks | 2012 |
| Architectural Antiques & Salvage Co Ltd | Holmfirth | 2021 |
| Architectural Installations Ltd | Gravesend | 2014 |
| Architectural Technology Academy Limited | London | 2008 |
| Architectural Technology Services Limited | | 1987 |
| Architectural Wraps UK Ltd | Maidstone | 2019 |
| Architecture Lgbt CIC | London | 2026 |
| Architecture Shop Ltd | London | 2018 |
| Archive Tattoo Ltd | Bristol | 2026 |
| Archive Vintage Dubai Limited | London | 2026 |
| Archive ZOO Limited | Gerrards Cross | 2018 |
| Archive-Vault Limited | Norwich | 2006 |
| Archives and Records Association (UK and Ireland) | Bristol | 1994 |
| Archives for London Limited | | 2005 |
| Archland Property Management Limited | Tunbridge Wells, Kent | 2017 |
| Archon Family Investments Limited | Berwick Upon Tweed | 2018 |
| Archspan Construction Ltd | Gateshead | 2014 |
| Archway Comtech Limited | London | 2013 |
| Archway Developments (2) Limited | Newport Pagnell | 2019 |
| Archway Developments (3) Limited | Newport Pagnell | 2019 |
| Archway DRY Cleaners Limited | London | 2023 |
| Archway Funeral Service Limited | Ripley | 2016 |
| Archway New Style Ltd | N19 3Qs London | 2019 |
| Archwell Damp Proofing Ltd | London | 2026 |