| A C Whole Sale Merchandiser Ltd. | Energy | 2008 |
| A Coldwell Tiling Limited | Construction | 2022 |
| A D Solutions (Rotherham) Ltd | Construction | 2026 |
| A Dyson Plastering Limited | Construction | 2018 |
| A Five Starz Ltd | Wholesale & retail | 2025 |
| A for Appointments Limited | Administrative & support | 1999 |
| A H GAS Services Ltd | Manufacturing | 2011 |
| A H Properties Ideal Ltd | Real estate | 2019 |
| A Haynes Plastering Limited | Construction | 2023 |
| A J and S Developments Limited | Construction | 2021 |
| A J Loveland (Central) Limited | Construction | 2008 |
| A J Spares Ltd | Wholesale & retail | 2018 |
| A K Housing Services Limited | Real estate | 2000 |
| A Khan Consultancy Ltd | Health & social care | 2021 |
| A L Hayes Property Ltd | Real estate | 2023 |
| A Lightfoot Property Ltd | Real estate | 2025 |
| A Locksmiths Ltd | Administrative & support | 2018 |
| A Macreadie Window Cleaning Ltd | Administrative & support | 2023 |
| A Mason Limited | Construction | 2013 |
| A Otley Limited | Construction | 2006 |
| A P Smith Rigging Limited | Information & communication | 2019 |
| A Premier Developments Ltd | Construction | 2024 |
| A Proper JOB Ltd | Construction | 2022 |
| A R Naylor & Sons Limited | Construction | 2005 |
| A Ramzan Ltd | Health & social care | 2022 |
| A S Dental Holdings Ltd | Health & social care | 2017 |
| A S Fuels Limited | Mining & quarrying | 2013 |
| A S Insurance Services Limited | Financial services | 2010 |
| A S Metalcraft Ltd | Construction | 2011 |
| A S Retail Limited | Mining & quarrying | 2013 |
| A Star PH Ltd | Wholesale & retail | 2026 |
| A T Home Staging and Refurbishment Limited | Real estate | 2025 |
| A W Cladding Limited | Construction | 2020 |
| A&A Transport and Logistics Ltd | Transport & logistics | 2025 |
| A&A Travel Rotherham Ltd | Transport & logistics | 2025 |
| A&H&A Associates Ltd | Professional & scientific | 2025 |
| A&J Homestead Company Ltd. | Agriculture & fishing | 2023 |
| A&L World Ltd | Real estate | 2014 |
| A&M Security Solutions Ltd | Construction | 2026 |
| A&M-Omar Hcare Ltd | Health & social care | 2024 |
| A&R Securities Ltd | Administrative & support | 2024 |
| A&S Alam Property Group Ltd | Real estate | 2026 |
| A&S Partners Ltd | Professional & scientific | 2018 |
| A&T Services Services Ltd | Construction | 2026 |
| A. B. Gray Limited | Arts & recreation | 2019 |
| A. Smith ANP Limited | Health & social care | 2025 |
| A.Cooper Ltd | Construction | 2020 |
| A.H.G Assets Ltd | Other services | 2022 |
| A.H.G Buying Ltd | Administrative & support | 2022 |
| A.H.G Sheff Ltd | Hospitality | 2022 |
| A.I Facilities Management Ltd | Construction | 2025 |
| A.I Properties (Yorkshire) Ltd | Real estate | 2026 |
| A.J Millward Property Solutions Ltd | Construction | 2017 |
| A.J. Beaumont Limited | Construction | 2016 |
| A.J. Loveland Limited | Construction | 1962 |
| A.J.R TV Ltd | Information & communication | 2022 |
| A.J.W Properties & Property Maintenance Ltd | Construction | 2023 |
| A.J.W Works Ltd | Construction | 2018 |
| A.K.A Properties (Huddersfield) Ltd | Real estate | 2023 |
| A.L.M.E.C Services Ltd | Manufacturing | 2023 |
| A.M. & J. Credland Limited | Wholesale & retail | 1979 |
| A.P.Smith & Bros.Limited | Wholesale & retail | 1935 |
| A.P.V Group Limited | Real estate | 2022 |
| A.R Lettings and Management Ltd | Real estate | 2022 |
| A.R.Ansari's Consultants Limited | Professional & scientific | 2025 |
| A.R.B Plastering Ltd | Construction | 2022 |
| A.R.T. 3 Private Hire Ltd | Transport & logistics | 2014 |
| A.T.S.Uk Private Limited | Wholesale & retail | 2017 |
| A1 Autofit Limited | Wholesale & retail | 2001 |
| A1 Body Repairs Ltd | Wholesale & retail | 2021 |
| A1 Precision Engineering (2015) Ltd | Manufacturing | 2015 |
| A1 Taxis Rotherham Limited | Transport & logistics | 2021 |
| A1 Windows and Roofing Ltd | Construction | 2024 |
| A19 Customs Limited | Wholesale & retail | 2026 |
| A2B Trucking UK Ltd | Transport & logistics | 2012 |
| A2Z Web Ltd | Information & communication | 2012 |
| A3 Hire Club Ltd | Hospitality | 2020 |
| A3G Ltd | Professional & scientific | 2022 |
| A78 Ltd | Wholesale & retail | 2018 |
| AA Global Traders (UK) Limited | Wholesale & retail | 2024 |
| AA Home Investments Ltd | Financial services | 2025 |
| AA Islam Ltd | Wholesale & retail | 2023 |
| AA MOT Ltd | Wholesale & retail | 2016 |
| Aace Limited | Construction | 2017 |
| Aadam Hassan Ltd | Health & social care | 2021 |
| AAF Real Estate Ltd | Real estate | 2025 |
| AAG Plumbing & Heating Ltd | Construction | 2013 |
| Aahmed Properties Ltd | Real estate | 2026 |
| AAJ Locum Services Ltd | Health & social care | 2023 |
| AAM Convenience Store Ltd | Hospitality | 2024 |
| AAM Techventures Ltd | Administrative & support | 2015 |
| AAR International Ltd | Manufacturing | 2013 |
| Aaraav Metal Recycling Ltd | Water & waste | 2016 |
| Aardvark Display Lighting Limited | Manufacturing | 2014 |
| Aardvark Holdings Limited | Financial services | 2022 |
| Aardvark Swift Recruitment Limited | Administrative & support | 2005 |
| AB & C Holdings Limited | Real estate | 2026 |
| AB Design & Build Yorkshire Ltd | Construction | 2024 |
| AB Pan-European Investment Group Ltd | Financial services | 2019 |
| AB Trade Group Ltd | Wholesale & retail | 2025 |