| 06949717 | Professional & scientific | 2009 |
| 1 Creative (Solutions) Limited | Information & communication | 2014 |
| 1805 Property Consultants Limited | Construction | 2022 |
| 2 Sons Home Lettings Ltd | Real estate | 2024 |
| 20THIRTYRECORDS Ltd | Administrative & support | 2021 |
| 3 Southdene Limited | Households | 2013 |
| 303 Automation and Electrical Engineering Ltd | Construction | 2025 |
| 35 Hanover Holding Ltd | Households | 2024 |
| 4DS (Holdings) Ltd | Administrative & support | 2014 |
| 4T Properties Ltd | Construction | 2021 |
| 4WOOD FR8 Ltd | Transport & logistics | 2019 |
| A & G Property Renovations Ltd | Construction | 2017 |
| A & J Electrical Contractors Limited | Construction | 2008 |
| A Davies Holdings Ltd | Financial services | 2021 |
| A Davies Transport Ltd | Transport & logistics | 2007 |
| A Heeley Plumbing & Heating Ltd | Construction | 2014 |
| A Howard Estates Ltd | Real estate | 2025 |
| A J Dickinson Ltd | Professional & scientific | 2024 |
| A Price Services Ltd | Construction | 2025 |
| A Star Electrics Ltd | Construction | 2025 |
| A Touch of Glass (Yorkshire) Ltd | Construction | 2015 |
| A&W Driveways Limited | Construction | 2018 |
| A.C.M.S. Fabrication Limited | | 1962 |
| A.C.R. Plastering Limited | Construction | 2013 |
| A.I.P. Compressor Services Limited | Manufacturing | 1981 |
| A.I.P. Compressors Limited | Real estate | 2025 |
| A.M.S. Plumbing Limited | Manufacturing | 2013 |
| A.Mushtaq Ltd. | Information & communication | 2017 |
| A.P.D. Fitness Services Ltd | Other services | 2024 |
| A1 Property Portfolio Ltd | Real estate | 2021 |
| ABC Installations Limited | Information & communication | 2016 |
| AC Electrical & Fire Ltd. | Construction | 2011 |
| Access Fobs Limited | Wholesale & retail | 2021 |
| Access Solutions Yorkshire Limited | Manufacturing | 2024 |
| Accord Multi Academy Trust | Education | 2011 |
| Aceprint West Yorkshire Ltd | Administrative & support | 2017 |
| Ackroyd Renovations Ltd | Construction | 2019 |
| Acne Contract Engineering Services Limited | | 1982 |
| AD Consultants Limited | Wholesale & retail | 2009 |
| Adam Stabler Joinery Ltd | Construction | 2025 |
| Adams Electrical & Property Ltd | Construction | 2026 |
| Adel Property Solutions Ltd | Real estate | 2022 |
| Adept Concrete Cutting Limited | Construction | 2001 |
| Admynex Limited | Administrative & support | 2024 |
| AES (YKS) Holdings Limited | Financial services | 2026 |
| AFL Academy Ltd | Education | 2026 |
| AGD Yorkshire Ltd | Construction | 2025 |
| Ainleys Insurance Brokers (Barnsley) Limited | Real estate | 2005 |
| Ainleys Insurance Brokers (Ossett) Limited | Financial services | 2009 |
| Airedale Tours Limited | Administrative & support | 1986 |
| Airedale Tours Transport Ltd | Administrative & support | 1999 |
| Airedale Travel Limited | Extraterritorial | 2015 |
| AJ Hire Limited | Administrative & support | 2024 |
| AJ Steel Rigging and Lifting Ltd | Construction | 2016 |
| AJD Interiors (Yorkshire) Limited | Construction | 2022 |
| AJK Vent & Plumbing Services Ltd | Construction | 2023 |
| Ajpsports Ltd | Arts & recreation | 2019 |
| AJW Finance Ltd | Professional & scientific | 2022 |
| Alacer Group Ltd | Wholesale & retail | 2026 |
| Alakai Ltd | Professional & scientific | 2020 |
| Albatross Marketing Limited | Professional & scientific | 1993 |
| Alex Fine Line Tattoo Studio Limited | Other services | 2026 |
| Alfmya Properties Ltd | Real estate | 2025 |
| Alice Wine Company Limited | Hospitality | 2025 |
| Alkan Polishing Limited | Administrative & support | 2014 |
| ALL Things Facilities Management Limited | Professional & scientific | 2020 |
| ALL Things Fire & Security Limited | Professional & scientific | 2014 |
| Allsop Bros. Limited | Construction | 2018 |
| Alpha White Lining Limited | Construction | 1991 |
| Alternative Drainage Company Limited | Other services | 2009 |
| AM Services (WY) Ltd | Manufacturing | 2015 |
| Amarok Construction Ltd | Construction | 2020 |
| Amichi Ltd | Wholesale & retail | 2022 |
| Amissou Properties Limited | Real estate | 2001 |
| Ammaxx Ltd | Construction | 2025 |
| Andrew Jones (Pies) Limited | Transport & logistics | 2005 |
| Anisa F Pharma Ltd | Health & social care | 2019 |
| AP Mechanical & Hvac Services Limited | Construction | 2021 |
| Apex Metals & Alloys Limited | Wholesale & retail | 2015 |
| APG Property Services Ltd | Real estate | 2023 |
| Apollonia Llewellyn Ltd | Arts & recreation | 2025 |
| Apollonias Property Portfolio Ltd | Real estate | 2026 |
| Appleyard Rippon Limited | Wholesale & retail | 2019 |
| Approved Design Consultancy Limited | Professional & scientific | 2000 |
| APW Training Centre Ltd | Education | 2023 |
| APX Studios Limited | Information & communication | 2026 |
| Archangel Monitoring Ltd | Extraterritorial | 2025 |
| ARCHIV3D Ltd | Wholesale & retail | 2023 |
| Arena Surfacing Ltd | Construction | 2026 |
| Arro Print Media Limited | Administrative & support | 1999 |
| Arslan Estates Ltd | Real estate | 2024 |
| Arthritis Specialists Limited | Health & social care | 2025 |
| Artisan Fireplace Design Limited | Construction | 2000 |
| Artofbim Ltd | Professional & scientific | 2025 |
| Ashcroft Holding Group Ltd | Financial services | 2025 |
| Ashcroft Renovations Ltd | Construction | 2025 |
| Ashcroft Residential Ltd | Construction | 2025 |
| Ashmore Spencer Ltd | Construction | 2015 |
| Ashton Mobile Solutions Limited | Information & communication | 2026 |
| Ashwood Court (Tateley Lane) Management Company Limited | Households | 2003 |