| Alforth Limited | Preston | 2016 |
| Alfostat Ltd | West Drayton | 2012 |
| Alfred Arvesen Invest Limited | London | 2011 |
| Alfred Arvesen Limited | London | 2010 |
| Alfred Couk Wine and Spirits Limited | Edinburgh | 1998 |
| Alfred Edward Jones Limited | Thame | 2022 |
| Alfred Haley & Co. Limited | Leeds | 1897 |
| Alfred Mcalpine International Limited | London | 1979 |
| Alfred Mcalpine Slate Penrhyn Limited | Derby | 1951 |
| Alfred O.Ferguson & Company Limited | Littleborough | 1926 |
| Alfred Price & Sons Trustees Ltd | Ormskirk | 2007 |
| Alfred Quaife & Co Limited | Wadebridge | 2002 |
| Alfred Road 1972 Limited | Dorchester | 2014 |
| Alfred Road Limited | Middlesex | 1991 |
| Alfred's Brewery Ltd | Winchester | 2011 |
| Alfredton Company Limited | Hitchin | 2012 |
| Alfresco Cafes Limited | Wembley | 2006 |
| Alfwoares Co., Ltd | London | 2024 |
| ALG Contracts Limited | Halstead | 2009 |
| ALG Developments (Yorkshire) Limited | Halifax | 2020 |
| Algar Trading Ltd | Milton Keynes | 2024 |
| Algarde Enterprises Limited | Nottingham | 1975 |
| Algarve Golf Courses Limited | Uxbridge | 1995 |
| Algebra Properties Limited | London | 2012 |
| Algen Sweden Limited | London | 2021 |
| Alghero Estates Limited | Stevenage | 2009 |
| Alhamra Import and Export Co., Ltd | London | 2025 |
| ALI Baba Carpets & Furniture Limited | Bradford | 2016 |
| ALI Bongo Limited | London | 2004 |
| ALI Car Care Ltd | London | 2013 |
| ALI Hussain Citizen Advice Security Martial Arts Limited | Waterlooville | 2021 |
| ALI Sajjad Shaikh Ltd | London | 2023 |
| ALI Saroosh Ltd | Ilford | 2022 |
| ALI Scott Ltd | St. Albans | 2025 |
| Ali-Nashe Ltd | Redruth | 2023 |
| Alia Vision Ltd | Manchester | 2024 |
| Aliant Law Limited | London | 2020 |
| Alibaba Hotels Limited | London | 2014 |
| Alibi Creative Ltd | London | 2025 |
| Alibi Trading Ltd | London | 2024 |
| Alicante Transfers Direct Limited | Manchester | 2018 |
| Alicante Transfers Limited | Manchester | 2018 |
| Alicap Ltd | Rugby | 2019 |
| Alice Business Consultant Limited | Cambridge | 2020 |
| Alice Cargo Service Ltd | Kenilworth | 2024 |
| Alice Homes Ltd | Wellingore | 1991 |
| Alice Margaret Gilder Limited | Perranporth | 2025 |
| Alicel Company Service Ltd | Croydon | 2025 |
| Aliceric Ltd | London | 2025 |
| Alices Bear Shop Limited | Seaton | 2010 |
| Alif ZAN Ltd | Ware | 2022 |
| Alifante International Communication Co., Ltd | Beckenham | 2016 |
| Alight International Ltd | London | 2024 |
| Aligma Tattoo Limited | London | 2013 |
| Align Clinics Limited | London | 2020 |
| Align Contracting Ltd | Manchester | 2023 |
| Aligned Building Consultancy Ltd | Colwyn Bay | 2025 |
| Aligned Fixture Ltd | London | 2025 |
| Aligned Holdings (U.K.) Limited | Paisley | 2017 |
| Aligned Limited | St. Albans | 2009 |
| Aligned Technology Services Ltd | London | 2024 |
| Aligra Group Limited | Groundwell Industrial Estate | 2009 |
| Alimenti (UK) Limited | Darwen | 2010 |
| Alimentum Holdings Ltd | Hampton | 2019 |
| Alimonzavi Ltd | London | 2025 |
| Alina Holding Norway Limited | London | 2025 |
| Alinter Group Limited | Brentwood | 2007 |
| Aliou Limited | Beckenham | 2020 |
| Aliport Commercial Limited | Shoreham-By-Sea | 2014 |
| Alis Kebab Invest Limited | London | 2023 |
| Alis Kebab Norway Limited | London | 2022 |
| Alisha Hussain Enterprise Limited | Edinburgh | 2011 |
| Alishba Drosje Invest Limited | London | 2022 |
| Alishba Drosje Limited | London | 2022 |
| Alison Brady Holistic Ltd | Scunthorpe | 2015 |
| Alison Braithwaite Limited | Stourport-On-Severn | 2017 |
| Alison Butters Consulting Limited | Kingston Upon Thames | 2006 |
| Alison Frances Daphne Pritchard Limited | Walsall | 2026 |
| Alison Frances Daphne Teague Limited | Walsall | 2024 |
| Alison Kirk Bridal Limited | Perth | 2012 |
| Alison Leigh Grundy Limited | Blackpool | 2025 |
| Alison Lucinda Richardson Limited | Slough | 2025 |
| Alison Mary Frances Hill Limited | Horsham | 2023 |
| Alison Robinson Ltd | Newcastle Upon Tyne | 2012 |
| Alisoncraine Limited | Blackpool | 2025 |
| Alisons of Cambridge Limited | Loughton | 2023 |
| Alison’S Nail Parlour Ltd | Nottingham | 2022 |
| Alist DS Limited | Leigh On Sea | 2012 |
| Alistair Duncan Lang Fraser Ltd | Glasgow | 2025 |
| Alistair James London Ltd | York | 2016 |
| Alistair John Fraser Ltd | Aviemore | 2024 |
| Alistair Noel Investments Limited | Hythe | 2017 |
| Alister David Wiggan Ltd | Shipley | 2024 |
| Alistide Ltd | London | 2025 |
| Alito Color Limited | London | 2005 |
| Alive Again Ltd | Glasgow | 2025 |
| Alive Events Management Ltd | Swanley | 2025 |
| Alive to Thrive and Prosper Ltd | Manchester | 2024 |
| Alizze Ltd | London | 2025 |
| Aljandeel Ltd | Manchester | 2020 |