| American Car Wash Islington Limited | London | 2020 |
| American Car Wash Kilburn Limited | London | 2022 |
| American Carwash Brent Cross Limited | London | 2022 |
| American Christmas Ltd | Liverpool | 2022 |
| American D Clean Ltd | Colindale | 2021 |
| American European Business Association Limited | London | 1983 |
| American Express Holdings 2 Limited | London | 2019 |
| American Fashion Nails Ltd | London | 2019 |
| American Golden Nails Ltd | Orpington | 2017 |
| American Gym Ltd | Glasgow | 2026 |
| American Immigration Law Office Ltd | London | 2012 |
| American Immigration Services Ltd | Abingdon | 2024 |
| American International Church | London | 2019 |
| American Modern Nails Ltd | Tunbridge Wells | 2022 |
| American Motorhome Club UK Limited | Welwyn Garden City | 2023 |
| American Nail & Spa Limited | Belfast | 2025 |
| American Nail Bar Ltd | London | 2019 |
| American Nail Design 393 Ltd | London | 2020 |
| American Nail Design 590 Ltd | London | 2022 |
| American Nail Design Limited | Coventry | 2026 |
| American Nail Fashion Limited | Sevenoaks | 2008 |
| American Nails & Beauty Ltd | Bath | 2019 |
| American Nails & Co. 4 Ltd | Mitlon Keynes | 2022 |
| American Nails & Spa (PA) Limited | Glasgow | 2020 |
| American Nails & Spa 172 Ltd | Bedford | 2024 |
| American Nails & Spa 33 Ltd | Berwick-Upon-Tweed | 2024 |
| American Nails & Spa 6868 Ltd | Greenock | 2025 |
| American Nails (L22) Limited | Liverpool | 2015 |
| American Nails (Leicester) Limited | Leicester | 2015 |
| American Nails (Liverpool) Limited | Liverpool | 2015 |
| American Nails (PA) Limited | Paisley | 2022 |
| American Nails (Wakefield) Ltd | London | 2015 |
| American Nails 1 Ltd | Fishponds | 2024 |
| American Nails 19 Ltd | Bridlington | 2024 |
| American Nails 2 Ltd | Newton Abbot | 2025 |
| American Nails 26 Ltd | Swindon | 2023 |
| American Nails 68 Ltd | London | 2021 |
| American Nails and Beauty HN Ltd | London | 2017 |
| American Nails and Beauty Salon Ltd | Hinckley | 2017 |
| American Nails and Beauty SG Ltd | Yeovil | 2023 |
| American Nails and Spa 15 Ltd | Wetherby | 2024 |
| American Nails and Spa Limited | Glasgow | 2023 |
| American Nails Anniesland Ltd | Glasgow | 2024 |
| American Nails BA3 Ltd | Radstock | 2026 |
| American Nails Beauty Ltd | London | 2026 |
| American Nails Cardiff Ltd | Cardiff | 2017 |
| American Nails Clacton Ltd | Clacton-On-Sea | 2026 |
| American Nails Clarkton Ltd | Glasgow | 2024 |
| American Nails Design Ltd | London | 2017 |
| American Nails DVN Ltd | Basingstoke | 2018 |
| American Nails HMT Ltd | Ebbw Vale | 2023 |
| American Nails HN Ltd | Stourport-On-Severn | 2024 |
| American Nails HO Ltd | London | 2022 |
| American Nails in Wellington Limited | Telford | 2018 |
| American Nails JK Limited | Enfield | 2016 |
| American Nails Kitty Ltd | Catterick Garrison | 2022 |
| American Nails Ltd | Selby | 2026 |
| American Nails North 2 Limited | Alfreton | 2013 |
| American Nails Salon Limited | Tonbridge | 2022 |
| American Nails Shirley Limited | Enfield | 2023 |
| American Nails SLT Ltd | London | 2016 |
| American Nails Studio Limited | Wilmslow | 2015 |
| American Nails Taunton Ltd | Taunton | 2018 |
| American Nails Tonypandy Ltd | Tonypandy | 2026 |
| American Nails TVT Ltd | London | 2018 |
| American Penguin Limited | Cambridge | 2021 |
| American Professional 1 Limited | South Yorkshire | 2006 |
| American Professional Nails 264 Ltd | Essex | 2023 |
| American Regal Nails Limited | Manchester | 2025 |
| American RV Club (1993) Ltd | Sidcup | 2023 |
| American Silk Nails Limited | Bristol | 2024 |
| American Star Nails Limited | London | 2019 |
| American Style Nails Ltd | London | 2012 |
| American Top Nails 125 Ltd | London | 2023 |
| American Top Nails 2 Ltd | Hatfield | 2023 |
| American Valeting Centre Ltd | Windsor | 2011 |
| American Women's Club Limited | London | 1955 |
| Americana Aesthetics Ltd | Portsmouth | 2026 |
| Americana Music Association UK | London | 2013 |
| Americannailspencoed Ltd | London | 2022 |
| Americano Fusion Limited | Hounslow | 2012 |
| Amerie Hair and Beauty Ltd | Walsall | 2024 |
| Ameron Energies Limited | London | 2024 |
| Ameropa UK Limited | Devon | 2002 |
| Amersham Deanery Trust | Chesham | 2012 |
| Amersham Physios Ltd | Amersham | 2021 |
| Amesbury Laundrette and DRY Cleaning Limited | London | 2024 |
| Amesbury's Motor Garage Ltd | Salisbury | 2016 |
| Ameswood Services Limited | | 1999 |
| Amethyst Accountancy Limited | Guildford | 2017 |
| Amethyst and Purple Ltd | London | 2023 |
| Amethyst Hair Design Ltd | Blackburn | 2012 |
| Amethyst HQ Ltd | Darwen | 2024 |
| Amethyst INK Studio Ltd | Glasgow | 2026 |
| Amethyst Purple Limited | Northampton | 2009 |
| Amethyst Therapies Ltd | Ashford | 2024 |
| Amethyst Therapy Limited | Luton | 2004 |
| Ameva Limited | Ruislip | 2025 |
| Amex Energy Consultants Limited | Birmingham | 2026 |
| Amex Housing Solutions Ltd | Mitcham | 2020 |