| A T K Asset Holdings Limited | Real estate | 2020 |
| A Taste of Salsa Limited | Arts & recreation | 2026 |
| A Team Lofts & Staircases Limited | Construction | 2019 |
| A Techno Ltd | Wholesale & retail | 2024 |
| A to Z Appliances and Gadgets Limited | Wholesale & retail | 2020 |
| A to Z Auto Car Parts Limited | Wholesale & retail | 2020 |
| A to Z Available Limited | Wholesale & retail | 2020 |
| A to Z Motor Spares Limited | Wholesale & retail | 2020 |
| A to Z Networxx Ltd | Other services | 2014 |
| A to Z Recruitment Personnel Ltd | Administrative & support | 2019 |
| A to Zeee Construction Ltd | Construction | 2014 |
| A Touch of Class Valeting & Car Wash Limited | Administrative & support | 2015 |
| A Trade Ltd | Wholesale & retail | 2021 |
| A V Capital UK Limited | Health & social care | 2013 |
| A Y & U Ltd | Professional & scientific | 2016 |
| A Z International Limited | Wholesale & retail | 2017 |
| A Zholi Ltd | Construction | 2025 |
| A&A Advisory Ltd | Information & communication | 2011 |
| A&A Event Creations Ltd | Wholesale & retail | 2024 |
| A&A Global Solutions Ltd | Information & communication | 2020 |
| A&A IT Consulting Ltd | Information & communication | 2020 |
| A&A Mobile Services Ltd | Wholesale & retail | 2026 |
| A&A Properties Management Ltd | Real estate | 2023 |
| A&A Reserved Ltd | Other services | 2025 |
| A&A Vehicles Ltd | Wholesale & retail | 2024 |
| A&B Construction Services Limited | Construction | 2018 |
| A&B Electrical Contractors Limited | Construction | 2013 |
| A&B Imported UK Ltd | Wholesale & retail | 2021 |
| A&B Motor Ltd | Wholesale & retail | 2025 |
| A&C Mihai Ltd | Construction | 2021 |
| A&D Build Ltd | Construction | 2021 |
| A&D Property Lettings Ltd | Real estate | 2020 |
| A&D SAH Limited | Wholesale & retail | 2023 |
| A&E Global Marketing Ltd | Professional & scientific | 2017 |
| A&F Global Venture Limited | Wholesale & retail | 2025 |
| A&G Building Services Limited | Construction | 2025 |
| A&H Alliance Limited | Other services | 2020 |
| A&H Electrics Ltd | Construction | 2018 |
| A&H Fire and Electrical Ltd | Construction | 2025 |
| A&H Health Solutions Ltd | Health & social care | 2026 |
| A&H Properties and Investments Limited | Real estate | 2026 |
| A&Hashir Limited | Wholesale & retail | 2022 |
| A&I Exports Limited | Wholesale & retail | 2024 |
| A&I Sons Limited | Real estate | 2022 |
| A&J Buy 2 LET UK Limited | Real estate | 2021 |
| A&M Sons Ltd | Other services | 2023 |
| A&N Holdings Ltd | Wholesale & retail | 2026 |
| A&N Quality Construction Ltd | Construction | 2022 |
| A&N UK Enterprise Ltd | Wholesale & retail | 2025 |
| A&O Business Services Limited | Hospitality | 2021 |
| A&Q Group Limited | Wholesale & retail | 2024 |
| A&R Elite Detailing Ltd | Administrative & support | 2026 |
| A&R Online Education Ltd | Education | 2020 |
| A&R Property Ventures Ltd | Real estate | 2019 |
| A&S Building Services Ltd | Construction | 2018 |
| A&S Business Ventures Ltd | Real estate | 2020 |
| A&S Cosmetic Ltd | Wholesale & retail | 2025 |
| A&S ENG Services Limited | Professional & scientific | 2015 |
| A&S London Estates Limited | Real estate | 2021 |
| A&S Partnerz Ltd | Wholesale & retail | 2024 |
| A&S Rentals Limited | Real estate | 2022 |
| A&S Specialist Supplies Ltd. | Manufacturing | 2016 |
| A&V Desing Ltd | Construction | 2021 |
| A&Y Housing Ltd | Real estate | 2022 |
| A&Z Holding Ltd | Real estate | 2022 |
| A&Z Style Ltd | Wholesale & retail | 2026 |
| A-Line Decorators Limited | Construction | 2026 |
| A-One Technology Ltd | Wholesale & retail | 2024 |
| A-Plus Contractors Limited | Construction | 2019 |
| A-Stone Ltd | Construction | 2019 |
| A-Z Chauffeurs Ltd | Transport & logistics | 2020 |
| A-Z Concepts UK Limited | Wholesale & retail | 2013 |
| A-Z Construction and Consultancy Limited | Construction | 2022 |
| A-Z Essentials Ltd | Wholesale & retail | 2011 |
| A-Z Ultimate Support Ltd | Construction | 2023 |
| A. & J. Car & Travel Service Limited | Transport & logistics | 1972 |
| A. a. Security Ltd | Administrative & support | 2021 |
| A. Ahad Mart Solutions Ltd | Wholesale & retail | 2025 |
| A. Hussain & F. Ahmed LLP | | 2023 |
| A. K. Hirani Limited | Other services | 2000 |
| A.A.Hafezi Limited | Professional & scientific | 2015 |
| A.A.Z Property Limited | Households | 2024 |
| A.B Picture Ltd | Other services | 2015 |
| A.B. Concord Properties Ltd | Real estate | 2024 |
| A.F.B. Heating and Airconditioning Ltd | Other services | 2004 |
| A.G. Autos Ltd. | Wholesale & retail | 2014 |
| A.Gem Logistics Ltd | Transport & logistics | 2025 |
| A.H Data Consultancy Ltd | Information & communication | 2024 |
| A.H Education Center Ltd | Education | 2020 |
| A.H. Page | Professional & scientific | 2008 |
| A.I Property Consultancy Ltd | Real estate | 2026 |
| A.Ibrahim & Co. Consultants Ltd | Administrative & support | 2026 |
| A.K.A Productive Solutions Ltd | Administrative & support | 2013 |
| A.K.Samy & SON UK Ltd | Wholesale & retail | 2026 |
| A.Kola Groundwork (U.K.) Ltd | Construction | 2023 |
| A.L Select Ltd | Professional & scientific | 2019 |
| A.L.E Huzum Limited | Transport & logistics | 2021 |
| A.L.J. Distributors Limited | | 1984 |
| A.M Business Consultancy Limited | Professional & scientific | 2013 |
| A.M Men&Van Ltd | Transport & logistics | 2025 |