| A&S Dentistry and Implant Centre Ltd | Health & social care | 2024 |
| A&S Develop Limited | Real estate | 2024 |
| A&S Group 1 Ltd | Wholesale & retail | 2026 |
| A&W Property Development Limited | Real estate | 2023 |
| A&Z Consultants Management Services Ltd. | Hospitality | 2024 |
| A&Z Financials Ltd | Professional & scientific | 2024 |
| A, R and H Ltd | Real estate | 2020 |
| A-Core Construction Ltd | Construction | 2025 |
| A-Core Site Services Ltd | Construction | 2025 |
| A-Creed Haulage Ltd | Transport & logistics | 2025 |
| A-Grade Interiors (UK) Ltd | Construction | 2023 |
| A-Grade Interiors Design Consultancy Ltd | Professional & scientific | 2023 |
| A-Oges Limited | Wholesale & retail | 2023 |
| A-One Cleaning Services Limited | Administrative & support | 2001 |
| A-Tek Design Ltd | Professional & scientific | 2024 |
| A-Trax Global Limited | Wholesale & retail | 2018 |
| A-Yalife Group Limited | Administrative & support | 2024 |
| A-Z Mortgages & Protection Ltd | Professional & scientific | 2021 |
| A-Z With GOD Trading Ltd | Wholesale & retail | 2025 |
| A. Armstrong and Sons Ltd | Wholesale & retail | 2025 |
| A. Bakewell Domestic Appliances Limited | Other services | 2010 |
| A. C. Michaels Limited | Health & social care | 2019 |
| A. F. Hunt (Builders) Holdings Limited | Professional & scientific | 2004 |
| A. G. Topham Limited | Construction | 2016 |
| A. Hames Limited | Construction | 2013 |
| A. Hinsley Limited | Construction | 1960 |
| A. Holmes Building Services Limited | Construction | 2018 |
| A. Qayum Limited | Wholesale & retail | 2007 |
| A. R. & H. Accountancy Services Limited | Professional & scientific | 2009 |
| A. W. Ellis Limited | Financial services | 2009 |
| A. Wainwright Construction Ltd | Construction | 2023 |
| A. Ward & SON Limited | Construction | 1995 |
| A. Welbourne Electrical Limited | Construction | 1995 |
| A.B Plastering Services Ltd | Construction | 2026 |
| A.B.E.R Investments Limited | Hospitality | 2025 |
| A.C. Asbestos Ltd | Construction | 2026 |
| A.C.A Global Infrastructure Ltd | Professional & scientific | 2026 |
| A.C.E. Response Limited | Construction | 2010 |
| A.C.Gill,Limited | Real estate | 1915 |
| A.D. Composite Services Ltd | Manufacturing | 2025 |
| A.D.E Regeneration Ltd | Administrative & support | 2016 |
| A.D.E Regeneration Properties Ltd | Construction | 2021 |
| A.D.G. Home Center Limited | Wholesale & retail | 1997 |
| A.E GEE Rentals Limited | Real estate | 2020 |
| A.E.Chambers Limited | Manufacturing | 1962 |
| A.E.Herbert Limited | Wholesale & retail | 1962 |
| A.F. Hunt (Builders) Limited | Construction | 1978 |
| A.F. Switchgear (Holdings) Limited | Financial services | 2007 |
| A.F. Technical Services Limited | Professional & scientific | 1997 |
| A.F.S. (UK) Limited | Real estate | 1997 |
| A.G. Higginson and Sons Limited | Hospitality | 1978 |
| A.G. Howick (Farmers) Limited | Agriculture & fishing | 1968 |
| A.G.C. Ltd | Hospitality | 2003 |
| A.G.J.S Properties Limited | Real estate | 2022 |
| A.H. (Notts) Limited | Construction | 2018 |
| A.H.Garner Limited | Manufacturing | 1949 |
| A.I Fabrications Ltd | Manufacturing | 2024 |
| A.I Properties Nottingham Limited | Real estate | 2023 |
| A.I.Motivate C.I.C. | Information & communication | 2025 |
| A.J Builders (UK) Ltd. | Construction | 2013 |
| A.J. Moore Consulting Limited | Wholesale & retail | 2023 |
| A.J. Rice Carpets & Vinyls Ltd | Construction | 2023 |
| A.J.Langford Building and Joinery Services Ltd | Construction | 2010 |
| A.J.R. (Nottingham) Limited | Administrative & support | 1999 |
| A.J.S. Embroidery Services Limited | Wholesale & retail | 1994 |
| A.J.S. Holdings Limited | Financial services | 1999 |
| A.J.W.Demolition Contractors Limited | | 1968 |
| A.Johal Optics Ltd | Health & social care | 2015 |
| A.K Granite and Stone Solutions Ltd | Construction | 2023 |
| A.Kucinskis Ltd | Wholesale & retail | 2024 |
| A.L. Motorcycles Limited | Wholesale & retail | 2021 |
| A.L.C Mechanical Limited | Construction | 2025 |
| A.L.D. Holdings Limited | Professional & scientific | 2001 |
| A.L.T (Holdings) Limited | Transport & logistics | 2012 |
| A.Langham and Sons Limited | Wholesale & retail | 1938 |
| A.M. Tree Services (East Midlands) Ltd | Construction | 2016 |
| A.M.S. Property Management Limited | Real estate | 1999 |
| A.N.T Supported Living Ltd | Health & social care | 2024 |
| A.P PVT Limited | Health & social care | 2014 |
| A.P.S. Complete Services Ltd | Construction | 2024 |
| A.P.T. (Nottingham) Limited | Real estate | 2002 |
| A.R.G Engineering Consultants Ltd | Real estate | 2019 |
| A.R.M. Healthcare Limited | Health & social care | 2009 |
| A.R.O Care Staffing Limited | Administrative & support | 2025 |
| A.S Developments Nottingham Ltd | Construction | 2026 |
| A.S.A. Trading (UK) Ltd | Manufacturing | 2010 |
| A.S.A.P Accounting Limited | Administrative & support | 2017 |
| A.S.Burke Property Limited | Construction | 2023 |
| A.T & Jackson Services Ltd | Construction | 2020 |
| A.T. Mech Services Ltd | Professional & scientific | 2022 |
| A.T.D.K Ltd | Wholesale & retail | 2025 |
| A.V Surgery Limited | Health & social care | 2006 |
| A.W. Drivers Ltd | Transport & logistics | 2018 |
| A.W. Lymn Green Energy Limited | Financial services | 2022 |
| A.W. Lymn Memorial Parks Limited | Other services | 2024 |
| A.W. Lymn Properties Limited | Real estate | 2012 |
| A.W. Lymn the Funeral Planning Service Limited | Other services | 2017 |
| A.W.Green and Sons(Farmers)Limited | Agriculture & fishing | 1965 |
| A.W.Lymn Limited | Other services | 1958 |
| A.W.Lymn the Family Funeral Service Limited | Other services | 1984 |