| A a Homes (Yorkshire) Ltd | Construction | 2010 |
| A a Magdum Ltd | Health & social care | 2020 |
| A and a Global Foods Ltd | Wholesale & retail | 2019 |
| A and G Interiors Ltd | Construction | 2017 |
| A and JK Properties Limited | Real estate | 2014 |
| A and L PUB Services Ltd | Professional & scientific | 2023 |
| A and Z Support Services Limited | Administrative & support | 2024 |
| A ARC Investments Limited | Wholesale & retail | 2021 |
| A B Basement Company Ltd | Construction | 2013 |
| A B Building Projects Limited | Construction | 2025 |
| A B Castle Limited | Transport & logistics | 2002 |
| A Barraclough Limited | Manufacturing | 2011 |
| A Better Fit Ltd | Households | 2017 |
| A C Builders Services Ltd | Construction | 2010 |
| A C Electrical & Mechanical Services Limited | Professional & scientific | 2013 |
| A C Elevators Ltd | Manufacturing | 2016 |
| A C K Electrical Services Ltd | Construction | 2012 |
| A C Landscape Services Ltd | Administrative & support | 2025 |
| A C R Asset Management Limited | Real estate | 2002 |
| A Casa DI Flavio Ltd | Hospitality | 2022 |
| A Cass Limited | Wholesale & retail | 2007 |
| A Chapman Consultancy Ltd | Professional & scientific | 2026 |
| A Class Engineering Ltd | Construction | 2025 |
| A D a Machining Services Limited | Manufacturing | 2003 |
| A D Assemblies Ltd | Professional & scientific | 2011 |
| A D Chapman Ltd | Real estate | 2021 |
| A D Payroll Solutions Ltd | Administrative & support | 2024 |
| A Dainty Holdings Ltd | Financial services | 2026 |
| A E Larder & Co Limited | Construction | 2005 |
| A Family Affair Films Ltd | Information & communication | 2018 |
| A Fleet for Change CIC | Transport & logistics | 2023 |
| A G and Sons Hauliers Ltd | Transport & logistics | 2014 |
| A G Property (UK) Limited | Real estate | 2013 |
| A G Systems Limited | Extraterritorial | 1995 |
| A Grade Driveways Ltd | Construction | 2023 |
| A Griffin Interiors Ltd | Manufacturing | 2024 |
| A H S Automotive Limited | Professional & scientific | 2014 |
| A H S Developments Limited | Real estate | 2025 |
| A H T B Ltd | Wholesale & retail | 2025 |
| A H Tyre Distribution Ltd | Wholesale & retail | 2022 |
| A Hird Rail Contractors Limited | Manufacturing | 2014 |
| A Hirst Co-Ordinating Solutions Ltd | Professional & scientific | 2018 |
| A Ilascu Limited | Professional & scientific | 2018 |
| A J C (Yorkshire) Ltd | Manufacturing | 2011 |
| A J MEE Ltd | Professional & scientific | 2019 |
| A J Residential Ltd | Real estate | 2021 |
| A J Sargeant & Co Limited | Administrative & support | 2017 |
| A J Senior Limited | Real estate | 2003 |
| A J Sharp Properties Ltd | Real estate | 2024 |
| A J Systems Limited | Information & communication | 2011 |
| A K Kasumba Ltd | Health & social care | 2019 |
| A K Neurology Limited | Health & social care | 2019 |
| A Khan 1109 Limited | Transport & logistics | 2025 |
| A L D Print Limited | Manufacturing | 2009 |
| A L Flooring Ltd | Construction | 2021 |
| A L VAG Monkeys Ltd | Wholesale & retail | 2018 |
| A L Wild Electrical Ltd | Construction | 2016 |
| A Little Aesthetic Ltd | Information & communication | 2017 |
| A Little Birdie Ltd | Professional & scientific | 2015 |
| A M B Stainless and NON Ferrous Limited | Manufacturing | 1999 |
| A M E Group Ltd | Professional & scientific | 2000 |
| A M E Product Development Solutions Ltd | Extraterritorial | 1997 |
| A M Greaves Accounting Ltd | Professional & scientific | 2026 |
| A M K Fence-In Limited | Construction | 1981 |
| A M K Surfacing and Civils Limited | Construction | 2025 |
| A M Marketing & Sales Ltd | Wholesale & retail | 2014 |
| A Manthorpe Limited | Professional & scientific | 2021 |
| A Mcintyre Roofing Limited | Construction | 2012 |
| A Mind Apart Theatre Company Limited | Education | 2008 |
| A Modern Way Limited | Information & communication | 2014 |
| A O Lynch Ltd | Administrative & support | 2020 |
| A One Motors Ltd | Wholesale & retail | 2024 |
| A One Seller Ltd | Wholesale & retail | 2025 |
| A Painter Consulting Ltd | Information & communication | 2025 |
| A Premier Roofing & Cladding Ltd | Construction | 2023 |
| A Pretty Affair Ltd | Other services | 2023 |
| A Property Portfolio Management Ltd | Real estate | 2025 |
| A QUE Ltd | Professional & scientific | 2015 |
| A R C Research & Consultancy Limited | Real estate | 1999 |
| A R Decorating Limited | Construction | 2018 |
| A R Plant Services Ltd | Construction | 2016 |
| A R Properties (Yorks/Notts) Ltd | Real estate | 2025 |
| A R Tennant Holdings Limited | Financial services | 2014 |
| A R Tennant Limited | Extraterritorial | 2003 |
| A Rehman Limited | Wholesale & retail | 2014 |
| A Revolting Class Ltd | Education | 2025 |
| A S Belts Limited | Manufacturing | 2013 |
| A S Heating & Plumbing Ltd | Construction | 2026 |
| A Sinc Limited | Other services | 2018 |
| A Slater & Sons Ltd | Other services | 2022 |
| A Special Place Company Ltd | Other services | 2023 |
| A Sunshine House Ltd | Real estate | 2021 |
| A Swift Builders Limited | Construction | 2013 |
| A T Helliwell Partnership Limited | Agriculture & fishing | 2023 |
| A T Roofing Limited | Construction | 2022 |
| A T T PUB Company Limited | Hospitality | 2025 |
| A Taste of Arabia Limited | Extraterritorial | 2024 |
| A Theatre (for NOW) CIC | Arts & recreation | 2026 |
| A to Z Building Services Limited | Construction | 2016 |
| A to Z Kidz Ltd | Education | 2015 |