| A J Bihla Construction Limited | Construction | 2021 |
| A J Executive Services Ltd | Transport & logistics | 2021 |
| A J Property and Consultancy Ltd | Real estate | 2024 |
| A J1 London Ltd | Transport & logistics | 2021 |
| A K C Health Therapy Ltd | Health & social care | 2023 |
| A K Durrani Limited | Hospitality | 2021 |
| A K Hayes Ltd | Wholesale & retail | 2016 |
| A Kattan Ltd | Construction | 2026 |
| A List Chauffeur Drive Ltd | Transport & logistics | 2015 |
| A Media Studio Ltd | Professional & scientific | 2025 |
| A Medical Services Ltd | Administrative & support | 2016 |
| A One Superstore Ltd | Real estate | 2013 |
| A Plus Travel Ltd | Administrative & support | 2020 |
| A R General Builders Ltd | Construction | 2024 |
| A R Prime Holdings Ltd | Transport & logistics | 2025 |
| A R V Tamil Ltd | Wholesale & retail | 2019 |
| A S Brar Ltd | Transport & logistics | 2017 |
| A S Mobile Accessories Ltd | Wholesale & retail | 2026 |
| A Star Retail Ltd | Wholesale & retail | 2025 |
| A Star Wholesale Ltd | Wholesale & retail | 2023 |
| A to Z Automan Ltd | Wholesale & retail | 2020 |
| A to Z Automotive Garage Ltd | Wholesale & retail | 2025 |
| A to Z Homeware Ltd | Other services | 2022 |
| A to Z Mobiles UK Limited | Wholesale & retail | 2017 |
| A to ZEE Cars Limited | Administrative & support | 2021 |
| A&B Daily Fresh Ltd | Wholesale & retail | 2025 |
| A&B Glazing Ltd | Manufacturing | 2025 |
| A&E GAS Ltd | Construction | 2024 |
| A&E Heating Services Ltd | Other services | 2017 |
| A&F Professional Cleaning Ltd | Administrative & support | 2024 |
| A&K Build Co Ltd | Construction | 2026 |
| A&K Catering London Ltd | Hospitality | 2025 |
| A&M Bhullar Limited | Transport & logistics | 2025 |
| A&M Services and Solutions Ltd | Wholesale & retail | 2026 |
| A&P Gaba Ltd | Real estate | 2021 |
| A&R Construction Group Ltd | Construction | 2025 |
| A&S Property Letting and Management Ltd | Real estate | 2015 |
| A&S Windows Craftsman Ltd | Construction | 2025 |
| A&V Khurana Limited | Wholesale & retail | 2025 |
| A&V Retail Ltd | Wholesale & retail | 2020 |
| A-2-Z Tree & Garden Services Ltd | Administrative & support | 2017 |
| A-List Builders Ltd | Construction | 2014 |
| A-Zod Limited | Wholesale & retail | 2025 |
| A.A.S.G Properties Limited | Real estate | 2024 |
| A.Regal Radio Cars Ltd | Transport & logistics | 2019 |
| A1 Assets Ltd | Real estate | 2025 |
| A1 Bedrooms and Kitchen Solutions Limited | Manufacturing | 2013 |
| A1 Cleaning & Silicone Services Ltd | Administrative & support | 2025 |
| A1 Construction & Building Ltd | Construction | 2018 |
| A1 Drive Limited | Construction | 2026 |
| A1 Global Ltd | Wholesale & retail | 2017 |
| A1 Home Contractors Ltd | Construction | 2026 |
| A1 Optics Ltd | Administrative & support | 2019 |
| A1 Paving & Driveways Ltd | Construction | 2018 |
| A1 Roofing Service Ltd | Construction | 2025 |
| A1 Star Construction Ltd | Construction | 2019 |
| A1 VEG Limited | Wholesale & retail | 1999 |
| A2A Retail Limited | Wholesale & retail | 2025 |
| A2A Traders Limited | Hospitality | 2025 |
| A2N2 Ltd | Real estate | 2021 |
| A2Z Complete Care Ltd | Water & waste | 2025 |
| A2Z Prop Co Ltd | Real estate | 2022 |
| A2Z Properties Solution Ltd | Construction | 2024 |
| A2ZITEMS Limited | Wholesale & retail | 2025 |
| AA Automotive Seat Covers Ltd | Manufacturing | 2018 |
| AA Cityride Limited | Transport & logistics | 2025 |
| AA Consultancy Services Ltd | Professional & scientific | 2024 |
| AA Financial Bizz Limited | Information & communication | 2014 |
| Aa&J Construction Ltd | Construction | 2022 |
| Aa&J Electrical and Plumbing Ltd | Construction | 2025 |
| AAA Elite Limited | Wholesale & retail | 2022 |
| Aaart Investments Ltd | Real estate | 2026 |
| AAB Consultanting Limited | Administrative & support | 2017 |
| Aaconnected Ltd | Administrative & support | 2026 |
| Aadams Apartments Ltd | Real estate | 2017 |
| Aadams Island Limited | Real estate | 2015 |
| Aadams Property Services Limited | Real estate | 2012 |
| Aadhvyan Data Services Ltd | Information & communication | 2022 |
| Aadhya Veda Limited | Health & social care | 2024 |
| AAG Builders Ltd | Construction | 2024 |
| AAH Traders Ltd | Wholesale & retail | 2024 |
| Aahar Vegetarian Limited | Hospitality | 2019 |
| Aahil Apartments Limited | Real estate | 2026 |
| AAK Recruitment Ltd | Water & waste | 2025 |
| AAK Superstore Limited | Wholesale & retail | 2022 |
| Aamrit Ltd | Construction | 2026 |
| Aansa Limited | Wholesale & retail | 2025 |
| Aarav GAS and Heating Ltd | Professional & scientific | 2023 |
| Aarfin Services Ltd | Transport & logistics | 2014 |
| Aashiana Bazaar Limited | Other services | 2015 |
| Aathani Limited | Real estate | 2024 |
| Aayat London Limited | Manufacturing | 2022 |
| AAZ Services Ltd | Other services | 2024 |
| Aazm Properties Ltd | Real estate | 2025 |
| AB Food & Clothing Ltd | Wholesale & retail | 2019 |
| AB Tetrawatts Limited | Energy | 2023 |
| Abantic.Com Ltd | Information & communication | 2024 |
| Abba Supplies Limited | Wholesale & retail | 2012 |
| Abba-Awo Ltd | Professional & scientific | 2026 |
| Abby Business Services Ltd | Wholesale & retail | 2018 |