| A.C.Services (UK) Limited | Construction | 2001 |
| A.D Management Services Limited | Professional & scientific | 2022 |
| A.D. Stutterheim Limited | Manufacturing | 2020 |
| A.D.P. Truck Ltd | Construction | 2015 |
| A.Davies & Co.(Shopfitters)Limited | Wholesale & retail | 1926 |
| A.E. Cook Limited | Real estate | 1973 |
| A.H.F Air Conditioning Ltd | Construction | 2026 |
| A.H.L Heating Ltd | Construction | 2024 |
| A.H.S. (Mechanical) Limited | Arts & recreation | 2000 |
| A.I.R. Capital Limited | Real estate | 2017 |
| A.J Roof Repairs & Renovations Ltd | Construction | 2024 |
| A.J Roofing & Property Maintenance Ltd | Construction | 2021 |
| A.J. Lill Building Contractors Limited | Construction | 2002 |
| A.J. Specialist Welding Services Limited | Construction | 1975 |
| A.J.B. Woodworking Limited | Manufacturing | 1999 |
| A.J.R Housing Limited | Real estate | 2021 |
| A.K Abba IT Solutions Ltd | Information & communication | 2019 |
| A.K Auto Empire Ltd | Wholesale & retail | 2021 |
| A.M Equities Ltd | Wholesale & retail | 2026 |
| A.N Service Ltd | Wholesale & retail | 2021 |
| A.P. Merrion and Associates Limited | Construction | 1979 |
| A.P.S News Ltd | Wholesale & retail | 2022 |
| A.P.T. Training & Consultancy Limited | Administrative & support | 2006 |
| A.R.E Investment Holdings Ltd | Wholesale & retail | 2023 |
| A.S Legal Services Ltd | Professional & scientific | 2023 |
| A.S Painting Contractors Group Ltd | Construction | 2025 |
| A.S. Thakor Limited | Real estate | 1990 |
| A.S.H. Bricklaying Limited | Construction | 2018 |
| A.S.H. Plumbing Heating Ltd | Construction | 2012 |
| A.S.J. Financial Services Limited | Financial services | 1989 |
| A.S.T Commercial Property Consultants Limited | Real estate | 2014 |
| A.Safdar Medical Ltd | Health & social care | 2026 |
| A.Smith & Co. Heating & Plumbing Ltd | Manufacturing | 2026 |
| A.T Power Services Ltd | Professional & scientific | 2024 |
| A.T Surfacing Ltd | Construction | 2025 |
| A.T. Services Air Conditioning & Ventilation Limited | Construction | 2023 |
| A.T. Services Building Services Maintenance Limited | Construction | 2023 |
| A.T. Services Limited | Construction | 1997 |
| A.T.Siddons & Sons Limited | Manufacturing | 1955 |
| A.V.A.S Consultancy Limited | Professional & scientific | 2016 |
| A.Vrubels Limited | Transport & logistics | 2014 |
| A.Walia Ltd | Information & communication | 2015 |
| A.Wilson & Sons(Transport)Limited | Wholesale & retail | 1971 |
| A.Y Watercoolers Limited | Wholesale & retail | 2017 |
| A.Z's MOT & Service Centre Limited | Wholesale & retail | 2012 |
| A1 & Co Accountants Ltd | Professional & scientific | 2021 |
| A1 Auto Repairs Ltd | Wholesale & retail | 2023 |
| A1 Binding Ltd | Manufacturing | 2014 |
| A1 Cable Installations Limited | Administrative & support | 2025 |
| A1 Car Sale Leicester Ltd | Wholesale & retail | 2024 |
| A1 Car Traders Ltd | Wholesale & retail | 2024 |
| A1 Dukan Ltd | Transport & logistics | 2023 |
| A1 Electrical Holdings Ltd | Financial services | 2022 |
| A1 Electrical Services (Leicester) Ltd | Other services | 2007 |
| A1 Eyecare Ltd | Health & social care | 2025 |
| A1 Haulage Ltd | Transport & logistics | 2014 |
| A1 HGV Training Limited | Transport & logistics | 2012 |
| A1 Japaneeds Auto Ltd | Wholesale & retail | 2006 |
| A1 Leicester Taxi Ltd | Transport & logistics | 2022 |
| A1 Mart Ltd | Wholesale & retail | 2023 |
| A1 Mobile Car Valeting Service Ltd | Administrative & support | 2018 |
| A1 Powder Coat Ltd | Wholesale & retail | 2021 |
| A1 Scaffolding (Leicester) Limited | Construction | 1999 |
| A1 Signs & Graphics (Leicester) Ltd | Wholesale & retail | 2011 |
| A1 Store Ltd | Wholesale & retail | 2017 |
| A1 Sulutions Limited | Professional & scientific | 2019 |
| A1 Trade Windows Ltd | Construction | 2019 |
| A10 Taxis Ltd | Transport & logistics | 2026 |
| A1REAL Ltd | Real estate | 2022 |
| A2 Fashion Ltd | Manufacturing | 2024 |
| A2B Building & Landscaping Limited | Administrative & support | 2018 |
| A2B Movements Ltd | Transport & logistics | 2020 |
| A2L Care Services Limited | Health & social care | 2016 |
| A2R Limited | Real estate | 2024 |
| A2V2 Limited | Construction | 2020 |
| A2X International Limited | Professional & scientific | 2024 |
| A2Z Coating Ltd | Manufacturing | 2023 |
| A2Z Hub Group Limited | Construction | 2023 |
| A3 Electrical and Renewables Limited | Construction | 2024 |
| A3S Solutions Limited | Manufacturing | 2021 |
| A4 Cozy Furnishings Ltd | Wholesale & retail | 2024 |
| A4 Trading Limited | Hospitality | 2010 |
| A47 Logistics Ltd | Transport & logistics | 2025 |
| A4CARGO Freight Ltd | Transport & logistics | 2026 |
| A7 Cars Ltd | Wholesale & retail | 2023 |
| A964 Limited | Information & communication | 2024 |
| AA & AH Limited | Real estate | 2010 |
| AA Account & Consult Ltd | Professional & scientific | 2023 |
| AA Aluminium Windows Limited | Manufacturing | 2012 |
| AA Cars and Tech Ltd | Wholesale & retail | 2024 |
| AA Consultancy (London) Limited | Professional & scientific | 2017 |
| AA Consultancy Services PVT Ltd | Information & communication | 2025 |
| AA Cosmetica Ltd | Health & social care | 2024 |
| AA Daycare Ltd | Health & social care | 2024 |
| AA Electrical (UK) Limited | Professional & scientific | 2014 |
| AA Foods Limited | Manufacturing | 2012 |
| AA Fresh Fruit&Veg Ltd | Wholesale & retail | 2025 |
| AA GAS Plumbing Ltd | Construction | 2024 |
| AA Holdings Leicester Limited | Financial services | 2020 |
| AA Lifestyle Luxury Ltd | Wholesale & retail | 2026 |