| Apex Recovery Ltd | Transport & logistics | 2011 |
| Apexsolutionx Ltd | Transport & logistics | 2026 |
| Apic Property Holdings Limited | Real estate | 2015 |
| Apmsh Optics Limited | Health & social care | 2022 |
| Apna Desserts Ltd | Wholesale & retail | 2025 |
| Apna Media Ltd | Professional & scientific | 2025 |
| Apna Punjab Properties Ltd | Real estate | 2026 |
| Apna Punjab Stonecross Limited | Wholesale & retail | 2026 |
| Apna Punjab Store Ltd | Wholesale & retail | 2021 |
| Apna Punjab West Bromwich Limited | Wholesale & retail | 2025 |
| Applaud Ltd | Financial services | 2024 |
| Appsolute Care Ltd | Information & communication | 2018 |
| Apware Systems Limited | Information & communication | 2004 |
| Aqua Bricks Ltd | Real estate | 2019 |
| Aquatech Civils Limited | Construction | 2025 |
| AR Crown Ltd | Wholesale & retail | 2026 |
| AR Estate Agents Ltd | Real estate | 2023 |
| AR Skyline Construction Ltd | Construction | 2019 |
| Aranja Limited | Wholesale & retail | 2019 |
| Aranja Properties Ltd | Real estate | 2025 |
| Arben Properties Ltd | Real estate | 2024 |
| ARC Kinetics Limited | Professional & scientific | 1985 |
| Arcade Vending Ltd | Administrative & support | 2023 |
| Archdevelo Ltd | Construction | 2020 |
| Archibald Kenrick & Sons Limited | Manufacturing | 1908 |
| Ariel Online Services Ltd | Other services | 2023 |
| Arins Capital Ltd | Real estate | 2020 |
| Arins Investments Ltd | Real estate | 2019 |
| Arioline Ltd | Transport & logistics | 2019 |
| Arjun Properties Midland Ltd | Real estate | 2020 |
| Arjun Transport Ltd | Transport & logistics | 2025 |
| Armaan Property Ltd | Real estate | 2025 |
| Armata Limited | Transport & logistics | 2018 |
| Arms Rehab Limited | Health & social care | 2010 |
| Aroma Albrighton Ltd | Extraterritorial | 2016 |
| Aroos Supermarket Westbrom Ltd | Wholesale & retail | 2025 |
| Arora Snacks Ltd | Manufacturing | 2025 |
| Arora Transporting Solutions Limited | Transport & logistics | 2024 |
| ARP Accident Repair & Paint Limited | Wholesale & retail | 2023 |
| Arsh Transport Services Ltd | Transport & logistics | 2025 |
| Art Cleaning ALL Limited | Administrative & support | 2022 |
| Arthur Williams Advisory Ltd | Administrative & support | 2024 |
| Artic Solutions Limited | Wholesale & retail | 2023 |
| Aryana Star Ltd | Transport & logistics | 2018 |
| ASA Imports Ltd | Wholesale & retail | 2025 |
| Asap 247 Home Emergency and Maintenance Ltd | Other services | 2021 |
| Asap 247 Ltd | Other services | 2021 |
| ASB Property Solutions Limited | Construction | 2024 |
| Ascend Health Care and Childcare Training Ltd | Education | 2017 |
| Asden House Nominees Limited | Other services | 1992 |
| Aseyori 4 U Ltd | Wholesale & retail | 2025 |
| ASG Conglomerate Ltd | Wholesale & retail | 2023 |
| ASG Courierss Ltd | Wholesale & retail | 2024 |
| ASH Motor Sales Ltd | Wholesale & retail | 2025 |
| ASH Rubber Products Limited | Manufacturing | 2012 |
| Ash's Auto Repairs Limited | Wholesale & retail | 2018 |
| Asher’S Aluminium Design Ltd | Construction | 2025 |
| Ashharcher Productions Ltd | Professional & scientific | 2025 |
| Ashmati Ltd | Hospitality | 2025 |
| Ashmore Properties Limited | Real estate | 1977 |
| ASJ Facilitie Building Management Ltd | Construction | 2021 |
| Askm Solutions Limited | Other services | 2020 |
| ASO Property Ltd | Real estate | 2025 |
| ASO Windows Ltd | Construction | 2026 |
| Aspbury & Sons Property's Ltd | Households | 2025 |
| ASR and P Holdings Limited | Financial services | 2024 |
| ASS Soultion Ltd | Transport & logistics | 2025 |
| Assetaro Ltd | Administrative & support | 2024 |
| Assist CBL Capital Limited | Real estate | 2023 |
| Assist Eco Solutions Ltd | Professional & scientific | 2020 |
| Assist Energy Group Ltd | Construction | 2024 |
| Assist Rendering Solutions Ltd | Households | 2024 |
| Astronomical Educational C.I.C. | Education | 2016 |
| Astronomical Entertainment Limited | Education | 2016 |
| ASV Prime Logistics Ltd | Transport & logistics | 2026 |
| AT.10 Limited | Manufacturing | 2026 |
| Atena Ltd | Manufacturing | 2018 |
| Athi Law LLP | | 2010 |
| Atif Aziz Ltd | Wholesale & retail | 2021 |
| Atlas Forklift Holdings Limited | Financial services | 2019 |
| Atlas Freight (UK) Limited | Transport & logistics | 2014 |
| Atlas Global Talent Ltd | Administrative & support | 2026 |
| Atlas Investment (U K) Limited | Real estate | 2019 |
| Atlasforklift.Co.Uk Ltd | Manufacturing | 2016 |
| Atoyen's Kitchen Ltd | Hospitality | 2021 |
| Atwal Caterers Ltd | Hospitality | 2020 |
| Atwal Properties (Midlands) Ltd | Real estate | 2021 |
| Auction Afrique UK Ltd | Water & waste | 2018 |
| Auda Traders Limited | Wholesale & retail | 2024 |
| Augus Engineering Limited | Manufacturing | 1997 |
| Aujla Building Contractors Ltd | Construction | 2024 |
| Aujla Property Group Ltd | Real estate | 2024 |
| Aujla Transport Services Ltd | Transport & logistics | 2026 |
| Aulakh Properties Service Limited | Real estate | 2025 |
| AUM Professional Services (UK) Limited | Professional & scientific | 2016 |
| Aura Climate Ltd | Construction | 2026 |
| Aurora Management Services Limited | Real estate | 2026 |
| Auto Body Care Limited | Wholesale & retail | 2018 |
| Auto Market Ltd | Wholesale & retail | 2015 |
| Auto Pass Academy Ltd | Education | 2025 |