| A to Z Sofa Ltd | Manufacturing | 2022 |
| A V Cuff Ltd. | Real estate | 2016 |
| A Vause & SON Limited | Other services | 2003 |
| A Venus Cultural Media Limited | Information & communication | 2025 |
| A Vibe Called Tech Ltd | Professional & scientific | 2020 |
| A Vintage Co Ltd | Information & communication | 2013 |
| A W Electrics (Sheffield) Limited | Construction | 2011 |
| A W S Consulting Engineers Limited | Professional & scientific | 2003 |
| A W Tools (Europe) Limited | Manufacturing | 2006 |
| A Watson Decorators Limited | Construction | 2018 |
| A Williamson Contracting Limited | Construction | 2011 |
| A Wingfield Performance Engineering Ltd | Wholesale & retail | 2024 |
| A&A Apex Automotive Limited | Wholesale & retail | 2026 |
| A&A Auto Service Ltd | Wholesale & retail | 2024 |
| A&A Carers Ltd | Health & social care | 2022 |
| A&A Couriers Ltd | Transport & logistics | 2024 |
| A&A Farming Ltd | Financial services | 2026 |
| A&A Growth Ltd | Wholesale & retail | 2022 |
| A&A Motors (Wombwell) Limited | Wholesale & retail | 2024 |
| A&A Nexus Ltd | Health & social care | 2022 |
| A&A Riverside Group Ltd | Hospitality | 2020 |
| A&A Telecom Ltd | Other services | 2017 |
| A&A.Sirius Limited | Hospitality | 2021 |
| A&Aplus Estates Ltd | Households | 2025 |
| A&Aplus Group Ltd | Households | 2025 |
| A&D Guarding and Facilities Services Ltd | Wholesale & retail | 2022 |
| A&D Private Limited | Wholesale & retail | 2023 |
| A&D Travel Solutions Ltd | Administrative & support | 2025 |
| A&E Consultancy Limited | Professional & scientific | 2015 |
| A&E Cosy Homes Limited | Real estate | 2024 |
| A&E Hall's Limited | Hospitality | 2025 |
| A&G Holmes Developments Ltd | Real estate | 2025 |
| A&G Stores Ltd | Wholesale & retail | 2025 |
| A&K Fish Bar Ltd | Hospitality | 2022 |
| A&M Group Holdings Ltd | Professional & scientific | 2023 |
| A&N Kaplans Investment Ltd | Real estate | 2025 |
| A&O Building Solution Limited | Construction | 2016 |
| A&O Roofing Ltd | Construction | 2022 |
| A&R (Sheffield) Limited | Real estate | 2020 |
| A&R Sheeting Ltd | Construction | 2025 |
| A&S Investment Holdings Limited | Real estate | 2025 |
| A&S Properties (SY) Ltd | Real estate | 2023 |
| A&S Transport Training Limited | Education | 2012 |
| A&T Complete Joinery Ltd | Construction | 2015 |
| A&T Realty Group Ltd | Real estate | 2024 |
| A&Y Electrical Solutions Ltd | Extraterritorial | 2022 |
| A-Grade Ltd | Wholesale & retail | 2024 |
| A-Plus Trading Limited | Professional & scientific | 2011 |
| A-Sec Installations Ltd | Administrative & support | 2025 |
| A-Tek Roofing and Cladding Ltd | Construction | 2022 |
| A-Z Properties Ltd | Real estate | 2016 |
| A. & E. Transport Limited | Transport & logistics | 1974 |
| A. & W. Helliwell & Sons Limited | Agriculture & fishing | 1973 |
| A. Ball & SON Limited | Wholesale & retail | 1972 |
| A. Cumberlidge Limited | Construction | 1974 |
| A. J. Salisbury Ltd | Transport & logistics | 2018 |
| A. Jones Property Holdings Ltd | Real estate | 2022 |
| A. M. & Sons (HMC) Ltd | Wholesale & retail | 2012 |
| A. M. Savage Limited | Wholesale & retail | 2002 |
| A. Ozturk Accountancy Limited | Professional & scientific | 2020 |
| A. Pattison Contractors Ltd | Construction | 2010 |
| A. Prime Maintenance Group Ltd | Construction | 2025 |
| A. R. C. Network Limited | Administrative & support | 2009 |
| A. S Motors(Uk) Ltd | Wholesale & retail | 2020 |
| A. Steadman & SON (Holdings) Limited | Extraterritorial | 2006 |
| A. Steadman & SON Limited | Extraterritorial | 1987 |
| A.A. Aesthetics Ltd | Health & social care | 2015 |
| A.A.S.Auto Ltd | Wholesale & retail | 2019 |
| A.B. Hotels (Five Lakes) Limited | Hospitality | 2016 |
| A.B.S Property Specialists Limited | Construction | 2015 |
| A.C.H. (Medical Legal) Limited | Health & social care | 2010 |
| A.C.H. (Yorkshire) Limited | Health & social care | 2010 |
| A.D Access Scaffolding Contractors Ltd | Construction | 2007 |
| A.D. Fergusson & Co. Limited | Wholesale & retail | 1981 |
| A.D.D. Restaurant & Bar Ltd | Hospitality | 2018 |
| A.E. Transport Limited | Transport & logistics | 1999 |
| A.E.K Sports Ltd | Education | 2025 |
| A.E.M.I Group Ltd | Real estate | 2023 |
| A.E.Y Consultancy Limited | Wholesale & retail | 2026 |
| A.F. Dobson Limited | Wholesale & retail | 1936 |
| A.G.A. Limited | Information & communication | 1997 |
| A.G.A. Profilers Limited | Manufacturing | 2009 |
| A.G.G. Direction Limited | Administrative & support | 2006 |
| A.H.Walker Cardiac Surgeon Limited | Health & social care | 2019 |
| A.Hemingway and Sons Limited | Agriculture & fishing | 1959 |
| A.Holroyd Ltd. | Energy | 2018 |
| A.I.A.M Investments Limited | Real estate | 2025 |
| A.J. Hamer Limited | Health & social care | 2009 |
| A.J. Sharp Holdings Limited | Financial services | 2018 |
| A.J. Sharp Limited | Manufacturing | 1999 |
| A.J.G. Leisure Ltd | Arts & recreation | 2009 |
| A.J.P. (Holdings) Company | Professional & scientific | 1962 |
| A.L.Simpkin & Co.Limited | Manufacturing | 1929 |
| A.M. Proos & Sons Limited | Extraterritorial | 1977 |
| A.M.C. Contracts (UK) Limited | Construction | 2001 |
| A.M.Clark Limited | Wholesale & retail | 1928 |
| A.P.A.G.B.I. Limited | Other services | 2006 |
| A.P.C.U. Learning Group Limited | Education | 2025 |
| A.P.E (Yorks) Limited | Manufacturing | 2009 |
| A.Pinder Limited | Manufacturing | 1938 |