| A & B Private Enterprise Ltd | Wholesale & retail | 2024 |
| A & Co (UK) Ltd | Information & communication | 2014 |
| A & D Plumbing & Heating Limited | Construction | 2020 |
| A & E Ventures Limited | Real estate | 2022 |
| A & F Ltd | Other services | 2006 |
| A & K Accountancy Services Limited | Professional & scientific | 2003 |
| A & M Associates (UK) Ltd | Information & communication | 2002 |
| A & M Properties (North West) Limited | Real estate | 2014 |
| A & M Property Solutions Ltd | Real estate | 2026 |
| A & N UK Investments Limited | Financial services | 2016 |
| A & P Consult Limited | Professional & scientific | 2022 |
| A & P Import Export Limited | Wholesale & retail | 2024 |
| A & P Solicitors Limited | Professional & scientific | 2017 |
| A & R Consultancy Limited | Wholesale & retail | 2016 |
| A & R Fashions Limited | Wholesale & retail | 2024 |
| A & R Properties and Investments Ltd | Real estate | 2022 |
| A & R Property Repairs Ltd | Real estate | 2013 |
| A & R Property Solutions Ltd | Real estate | 2024 |
| A & S Cars Limited | Administrative & support | 2013 |
| A & S Consultants Limited | Professional & scientific | 1999 |
| A & S Fast Foods Limited | Hospitality | 1995 |
| A 2 Z Windows Limited | Manufacturing | 2005 |
| A a Signals Limited | Administrative & support | 2010 |
| A and T Tackle Ltd | Wholesale & retail | 2020 |
| A B J Solutions Ltd | Real estate | 2010 |
| A B Publishing Limited | Other services | 1967 |
| A Better Classroom Limited | Education | 2022 |
| A Better YOU Limited | Other services | 2014 |
| A Brockwitz Builders Ltd | Construction | 2013 |
| A C F I Limited | Construction | 2018 |
| A C UK Logistics Limited | Transport & logistics | 2024 |
| A Capital Tyres Limited | Wholesale & retail | 2020 |
| A D Brick Work Ltd | Construction | 2020 |
| A D Consulting (LDN) Ltd | Administrative & support | 2010 |
| A D Salmon Consultancy Ltd | Professional & scientific | 2022 |
| A D Shah Financial Limited | Financial services | 2007 |
| A D Trading Online Ltd | Wholesale & retail | 2025 |
| A Developers Limited | Construction | 2013 |
| A E Industries Limited | Real estate | 2026 |
| A Express Tyre Ltd | Wholesale & retail | 2025 |
| A First Call Plant Hire & Sales Limited | Administrative & support | 2014 |
| A for Authors Agency Limited | Information & communication | 2019 |
| A G & Sons (UK) Ltd | Wholesale & retail | 2005 |
| A G N Financial Limited | Other services | 2012 |
| A H Hotel & Spa Limited | Hospitality | 2014 |
| A I Medics Ltd | Health & social care | 2025 |
| A J Advisory Consultants Ltd | Administrative & support | 2014 |
| A J Dampproofing Ltd | Construction | 2021 |
| A J Shaw Limited | Real estate | 2010 |
| A K Builders Limited | Construction | 2008 |
| A K Cosmetics Limited | Wholesale & retail | 2023 |
| A L Law Associates Limited | Professional & scientific | 2011 |
| A Level Property Ltd | Construction | 2024 |
| A London Chauffeur Ltd | Transport & logistics | 2024 |
| A Luxury Home Ltd | Wholesale & retail | 2016 |
| A M C Management Services Limited | Real estate | 2001 |
| A M Cafe Ltd | Hospitality | 2013 |
| A M Designs Limited | Wholesale & retail | 2003 |
| A M G Truck Ltd | Transport & logistics | 2013 |
| A M Jackson Ltd | Professional & scientific | 2012 |
| A M K O Properties Ltd | Real estate | 1995 |
| A Males Perspective Ltd | Health & social care | 2025 |
| A N B Services Ltd | Education | 2017 |
| A N Collections Ltd | Wholesale & retail | 2013 |
| A N Global Services Ltd | Information & communication | 2019 |
| A New World Ltd | Wholesale & retail | 2024 |
| A P Bookkeeping Ltd | Professional & scientific | 2015 |
| A P Mann Limited | Health & social care | 2014 |
| A P Security (APS) Ltd | Administrative & support | 2003 |
| A Pandit Limited | Other services | 2023 |
| A Photographer Ltd | Professional & scientific | 2018 |
| A R Chauffeur Services Limited | Transport & logistics | 2024 |
| A R Installation Ltd | Construction | 2019 |
| A R Malik Consulting Ltd | Professional & scientific | 2026 |
| A R Marks Contracts Ltd | Construction | 2021 |
| A Rakyan Collection Ltd | Wholesale & retail | 2014 |
| A Really Professional Concierge Service Limited | Hospitality | 2017 |
| A Room With a View Productions Limited | Information & communication | 1985 |
| A S C & Sons Limited | Real estate | 2024 |
| A S Divine Consultants Ltd | Professional & scientific | 2024 |
| A S Oberoi Limited | Professional & scientific | 2023 |
| A Sachoo Ltd | Health & social care | 2026 |
| A Slice Limited | Other services | 2014 |
| A Slice of Nice Education CIC | Hospitality | 2026 |
| A Spark Invest Ltd | Construction | 2026 |
| A Star Chauffeurs Ltd | Transport & logistics | 2024 |
| A Star Fish Bar Limited | Hospitality | 2018 |
| A Star Tutors (UK) Limited | Education | 2005 |
| A Stitch That Fits Ltd | Wholesale & retail | 2018 |
| A T Real Estate Ltd | Real estate | 2025 |
| A T S 3 Limited | Professional & scientific | 2019 |
| A T Valuations Ltd. | Professional & scientific | 2022 |
| A Thread & a Thought Limited | Wholesale & retail | 2016 |
| A to Z Advisory Ltd | Professional & scientific | 2024 |
| A to Z Clothing Co Ltd | Administrative & support | 2018 |
| A to Z Fresh Wealdstone Ltd | Wholesale & retail | 2020 |
| A to Z Home Improvement Ltd | Administrative & support | 2021 |
| A to Z Media Management Limited | Information & communication | 2014 |
| A to Z Medicines Ltd | Wholesale & retail | 2026 |
| A Touch of Angel's Cleaning Limited | Administrative & support | 2016 |