| Aarti Wholesale Ltd | Manufacturing | 2024 |
| Aaru Enterprise Ltd | Wholesale & retail | 2015 |
| Aarushi Fashion Hub Limited | Manufacturing | 2018 |
| Aarushiv Properties Limited | Real estate | 2023 |
| Aarvish Global Ltd | Wholesale & retail | 2023 |
| Aarya Care Services Ltd | Health & social care | 2026 |
| Aarya Estates Group Ltd | Real estate | 2026 |
| Aarya Investments Limited | Real estate | 2023 |
| Aarya Ltd | Real estate | 2022 |
| Aarya Retail Limited | Wholesale & retail | 2025 |
| AAS Consultancy Services Ltd | Professional & scientific | 2019 |
| AAS Trade UK Ltd | Wholesale & retail | 2022 |
| Aashvee Removals & Logistics Ltd | Transport & logistics | 2026 |
| Aaska Motors Limited | Wholesale & retail | 2025 |
| Aasra Associates Limited | Professional & scientific | 2021 |
| AAT Trade Limited | Wholesale & retail | 2024 |
| Aathi Cash &Curry Ltd | Wholesale & retail | 2025 |
| AAV Motors Trading Limited | Wholesale & retail | 2025 |
| Aavaar Homes Ltd | Real estate | 2021 |
| Aavaar Investments Ltd | Financial services | 2024 |
| Aavad Krupa Developments Ltd | Construction | 2023 |
| Aavkar Limited | Wholesale & retail | 2018 |
| Aayan (Leic) Ltd | Manufacturing | 2025 |
| Aayushmaan Properties Ltd | Real estate | 2024 |
| Aazaac Social and Therapeutic Work Ltd | Extraterritorial | 2022 |
| AB 55 Limited | Wholesale & retail | 2019 |
| AB Assembly Services Ltd | Other services | 2018 |
| AB Autocare Limited | Wholesale & retail | 2020 |
| AB Cuisine Ltd | Hospitality | 2025 |
| AB Development and Consultancy Solutions Limited | Health & social care | 2015 |
| AB Food(Uk) Ltd | Hospitality | 2025 |
| AB Gems Ltd | Wholesale & retail | 2026 |
| AB Leicester Ltd | Hospitality | 2025 |
| AB Management Consulting Services Ltd | Professional & scientific | 2021 |
| AB Navsa Ltd | Real estate | 2023 |
| AB Racing Services Ltd | Wholesale & retail | 2020 |
| AB Retail Store Ltd | Wholesale & retail | 2025 |
| AB Window Cleaning Ltd | Administrative & support | 2018 |
| Ab.Rf Locums Ltd | Professional & scientific | 2025 |
| AB10 Design Limited | Manufacturing | 2025 |
| AB54TAR Ltd | Real estate | 2025 |
| Ababbeel Cars Ltd | Wholesale & retail | 2017 |
| Abacaii Ltd | Professional & scientific | 2014 |
| Abaco Systems Limited | Manufacturing | 1987 |
| Abaco UK Holdco Limited | Professional & scientific | 2016 |
| ABACUS92 Limited | Financial services | 2026 |
| Abawan Ltd | Health & social care | 2026 |
| Abaya Klosette Limited | Professional & scientific | 2026 |
| Abaya Lounge Ltd | Wholesale & retail | 2024 |
| Abbasi Automobile and Recovery Ltd | Wholesale & retail | 2025 |
| Abbataz Motors Limited | Wholesale & retail | 2008 |
| Abberdale Limited | Health & social care | 2011 |
| Abberley Ace Ltd | Transport & logistics | 2014 |
| Abberville Capital Partners Ltd | Real estate | 2026 |
| Abberville Investments Ltd | Real estate | 2019 |
| Abbey Aspinall Limited | Professional & scientific | 2024 |
| Abbey Blinds Barrow Ltd | Wholesale & retail | 2023 |
| Abbey Building Holdings Limited | Financial services | 2018 |
| Abbey Business School Limited | Education | 2010 |
| Abbey Fencing & Timber Supplies Ltd | Wholesale & retail | 2024 |
| Abbey Fire (UK) Limited | Professional & scientific | 2002 |
| Abbey Food & Spice UK Limited | Hospitality | 2021 |
| Abbey Hotel (Minster on Sea) Limited | Hospitality | 2026 |
| Abbey Housing Services Ltd | Real estate | 2021 |
| Abbey Lane Tracking and Services Ltd | Wholesale & retail | 2025 |
| Abbey Management Development International Ltd | Professional & scientific | 2012 |
| Abbey Motorcycles Limited | Wholesale & retail | 2003 |
| Abbey Nurseries Limited | Education | 2003 |
| Abbey Products (2017) Limited | Manufacturing | 2016 |
| Abbey Quarter Apartments Management Company Leicester Limited | Households | 2012 |
| Abbey RAI Legal Limited | Professional & scientific | 2025 |
| Abbey Support and Services Limited | Health & social care | 2014 |
| Abbey Windows Limited | Extraterritorial | 2012 |
| Abbeywalk Limited | Construction | 1997 |
| Abboià Limited | Professional & scientific | 2025 |
| Abbots Oak Manor LLP | | 2015 |
| Abbott Traders Limited | Wholesale & retail | 2017 |
| Abbsolve Cleaning Services Ltd | Administrative & support | 2025 |
| ABC 168 Limited | Hospitality | 2019 |
| ABC Accounts Limited | Professional & scientific | 2010 |
| ABC Building and Joinery Ltd | Manufacturing | 2020 |
| ABC Cosmetics Ltd | Other services | 2025 |
| ABC Food Private Limited | Other services | 2018 |
| ABC Global Market Ltd | Information & communication | 2025 |
| ABC Heating Services Ltd | Manufacturing | 2005 |
| ABC Holdings (Leic) Limited | Financial services | 2023 |
| ABC Leicester Limited | Professional & scientific | 2012 |
| ABC Logistics Limited | Transport & logistics | 2015 |
| ABC Private Ltd | Real estate | 2016 |
| ABC Specialist Limited | Professional & scientific | 2012 |
| ABC Taxis (Leics) Ltd | Transport & logistics | 2024 |
| Abcd (Global) Ltd | Other services | 2015 |
| Abcd Holdco Limited | Financial services | 2024 |
| Abcrent Ltd | Real estate | 2025 |
| ABD and Bros Limited | Wholesale & retail | 2023 |
| Abd(Leicester) Medics Ltd | Health & social care | 2025 |
| Abdb Constructions Ltd | Construction | 2023 |
| Abdeali Ltd | Construction | 2026 |
| Abdel Healthcare Ltd | Public administration | 2026 |
| Abdiaziz Ltd | Administrative & support | 2024 |