| A Taberna Portuguese Ltd | Hospitality | 2025 |
| A Tasca (Corby) Ltd | Hospitality | 2013 |
| A Tasca Exclusive Ltd | Hospitality | 2025 |
| A to B Car Sales Luton Ltd | Wholesale & retail | 2018 |
| A to B Cars (Luton) Limited | Administrative & support | 2011 |
| A to B Transfers Ltd | Transport & logistics | 2020 |
| A to Z Home Improvement Builders Ltd | Construction | 2024 |
| A to Z Home Improvements (Luton) Limited | Construction | 2024 |
| A to Z London Properties Ltd | Construction | 2025 |
| A to Z Stop and Shop Ltd | Wholesale & retail | 2025 |
| A V Panto Limited | Information & communication | 2022 |
| A Valeting Centre Ltd | Administrative & support | 2026 |
| A Verma Ltd | Professional & scientific | 2016 |
| A W Group Limited | Real estate | 1994 |
| A W UK Meats Limited | Wholesale & retail | 2023 |
| A Y Maintenance Ltd | Construction | 2021 |
| A&A Carwash Ltd | Administrative & support | 2019 |
| A&A Groundwork Construction Ltd | Construction | 2023 |
| A&A Homecare Ltd | Health & social care | 2018 |
| A&A Legacy Travel Ltd | Administrative & support | 2024 |
| A&A London UK Construction Company Ltd | Construction | 2025 |
| A&A ROS Ltd | Real estate | 2025 |
| A&Al Transport Ltd | Transport & logistics | 2021 |
| A&B Servicing Limited | Wholesale & retail | 2024 |
| A&C1 Ltd | Information & communication | 2022 |
| A&D Communications Limited | Information & communication | 2017 |
| A&D Luton Homes Ltd | Real estate | 2026 |
| A&D Maintenance Services Ltd | Construction | 2011 |
| A&D Trans Ltd | Transport & logistics | 2015 |
| A&Dcarservice Ltd | Wholesale & retail | 2026 |
| A&F Residential Lettings Ltd | Real estate | 2026 |
| A&H Accountancy Ltd | Professional & scientific | 2021 |
| A&I Logistics Ltd | Transport & logistics | 2025 |
| A&J Civils Limited | Construction | 2025 |
| A&J Sons Ltd | Wholesale & retail | 2026 |
| A&J’S Logistics Ltd | Wholesale & retail | 2025 |
| A&K Ecommerce Ltd | Wholesale & retail | 2026 |
| A&K Wholesales Ltd | Wholesale & retail | 2026 |
| A&L Mahmutaj(Holdings) Limited | Financial services | 2025 |
| A&M Accounts Ltd | Professional & scientific | 2024 |
| A&M Advisers Limited | Professional & scientific | 2024 |
| A&M Building Construction Ltd | Construction | 2022 |
| A&N Wholesale Ltd | Wholesale & retail | 2010 |
| A&O Serv Limited | Transport & logistics | 2018 |
| A&O Trading Limited | Public administration | 2013 |
| A&R Facilities & Solutions Ltd | Real estate | 2022 |
| A&R Global Holdings Ltd | Financial services | 2025 |
| A&Rl Consultancy Ltd | Professional & scientific | 2020 |
| A&S Beauty Limited | Wholesale & retail | 2018 |
| A&S Hashmi's Ltd | Wholesale & retail | 2022 |
| A&S Innovations Limited | Information & communication | 2014 |
| A&S Nickalls Ltd | Professional & scientific | 2020 |
| A&S Pharma Holdings Ltd | Financial services | 2022 |
| A&S Real Limited | Real estate | 2023 |
| A&S Top Cleaning Services Ltd | Administrative & support | 2023 |
| A&T Bespoke Builds Ltd | Construction | 2025 |
| A&T Bespoke Renovations Ltd | Construction | 2026 |
| A&U Consultants Ltd | Administrative & support | 2021 |
| A&Z Comfort Homes Ltd | Real estate | 2021 |
| A-Akm Services Ltd | Transport & logistics | 2020 |
| A-M Motors & Cars Ltd | Wholesale & retail | 2025 |
| A-Star Hospitality Limited | Hospitality | 2019 |
| A-Z Parts Ltd | Wholesale & retail | 2022 |
| A-Z Productsandaccessories Ltd | Wholesale & retail | 2025 |
| A-Z Security Services Ltd | Administrative & support | 2019 |
| A. Cars (Express Despatch) Limited | Transport & logistics | 1982 |
| A. Fulton Company Limited | Wholesale & retail | 1955 |
| A. Ghaffar Property Investment Ltd | Real estate | 2025 |
| A. Qayyum Accountants Ltd | Professional & scientific | 2013 |
| A.B. Interiors Limited | | 1992 |
| A.B.E&Emanuel Ltd | Administrative & support | 2022 |
| A.D.A Services Ltd | Hospitality | 2022 |
| A.D.H Builders (Luton) Ltd | Construction | 2025 |
| A.I. Choudhery Ltd | Financial services | 2018 |
| A.K. Halal Poultry Limited | Wholesale & retail | 2025 |
| A.K.O Trans Services Limited | Transport & logistics | 2018 |
| A.L. Roddy Limited | Professional & scientific | 2003 |
| A.M Carpentry (London) Ltd | Construction | 2024 |
| A.M.R Services Ltd | Manufacturing | 2018 |
| A.N Lifestyle Limited | Administrative & support | 2021 |
| A.N.S Consultancy Limited | Professional & scientific | 2024 |
| A.N.V Delivery Services Ltd | Transport & logistics | 2025 |
| A.P. Publications Limited | Arts & recreation | 2006 |
| A.S.C Business Enterprises Limited | Wholesale & retail | 2017 |
| A.T. Oliver & Sons Limited | Professional & scientific | 2004 |
| A.U.D Trading Limited | Extraterritorial | 2024 |
| A.W. House Property Investments Limited | Real estate | 2025 |
| A.W. Securities Limited | Real estate | 1972 |
| A.Y.Suga Media Ltd | Professional & scientific | 2025 |
| A1 24 Hour Luton Ltd | Transport & logistics | 2019 |
| A1 Auto Design Limited | Wholesale & retail | 2022 |
| A1 Cars ST Albans Limited | Transport & logistics | 2016 |
| A1 Commercial Service Ltd | Wholesale & retail | 2022 |
| A1 Direct Homes Ltd | Real estate | 2024 |
| A1 Executive Travel Ltd | Transport & logistics | 2016 |
| A1 Frozen Foods Limited | Wholesale & retail | 2002 |
| A1 House Mover Limited | Transport & logistics | 2026 |
| A1 Lahori Desserts Ltd | Hospitality | 2024 |
| A1 Lahori Taste Ltd | Hospitality | 2024 |
| A1 Lahori Zaiqa Ltd | Hospitality | 2017 |