| "Five Towns Plus" Hospice Fund Limited(The) | Health & social care | 1984 |
| (UK) WF Ltd | Professional & scientific | 2017 |
| 01056044 Limited | Professional & scientific | 1972 |
| 1 Diamond Home Care Ltd | Health & social care | 2011 |
| 10 Palmers Avenue Ltd | Real estate | 2022 |
| 100 Larks Hill Limited | Real estate | 2024 |
| 13STKA UK Ltd | Transport & logistics | 2021 |
| 141 Investments Ltd | Real estate | 2025 |
| 15EMS Ltd | Hospitality | 2023 |
| 1902 Ropergate Ltd | Wholesale & retail | 2017 |
| 19EIGHTY4 Ltd | Information & communication | 2025 |
| 1ST Choice Leeds Ltd | Transport & logistics | 2015 |
| 21ST Century Eco-Homes Limited | Construction | 2013 |
| 25 Tuna Ltd | Information & communication | 2026 |
| 3 Ships Properties Limited | Real estate | 2019 |
| 321 Productions Limited | Information & communication | 2012 |
| 335 Promotions Ltd | Arts & recreation | 2024 |
| 360 Clicks Limited | Wholesale & retail | 2002 |
| 360 Degrees Media Limited | Information & communication | 2005 |
| 3D Custom Creations Ltd | Manufacturing | 2019 |
| 3FOR Limited | Administrative & support | 2014 |
| 3RN Company Ltd. | Wholesale & retail | 2025 |
| 42 the Bakehouse Limited | Wholesale & retail | 2018 |
| 432 Films Ltd | Professional & scientific | 2023 |
| 4BROTHERS Takeaway Ltd | Hospitality | 2024 |
| 4JTTRANSPORT Limited | Transport & logistics | 2023 |
| 5 Star Fisheries Management Ltd | Agriculture & fishing | 2021 |
| 5 Towns Veterans Support Hub CIC | Health & social care | 2019 |
| 56 Southgate Road Management Company Limited | Real estate | 2012 |
| A & B Groundworks Limited | Construction | 2020 |
| A a Smith Limited | Manufacturing | 1976 |
| A BIT of Chaos Theory Limited | Construction | 2026 |
| A C Logistics Limited | Transport & logistics | 2007 |
| A D I Enterprises (Yorkshire) Limited | Hospitality | 2018 |
| A Kiss From a Goddess Limited | Manufacturing | 2018 |
| A L Utilities Limited | Professional & scientific | 2020 |
| A M Leisure (Brotherton) Ltd | Wholesale & retail | 2018 |
| A R Joinery (Design & Manufacture) Limited | Manufacturing | 2008 |
| A Rated Powerflush Ltd | Construction | 2024 |
| A Space to Love Limited | Wholesale & retail | 2019 |
| A Wood Services Limited | Transport & logistics | 2017 |
| A&D Lettings Ltd | Real estate | 2021 |
| A&L Takeaway Ltd | Hospitality | 2017 |
| A&S Catering Services Limited | Hospitality | 2015 |
| A-Z Scaffolding Services Ltd | Construction | 2016 |
| A. & S. Turner (Haulage) Ltd | Transport & logistics | 1971 |
| A.A Utilities & Groundworks Ltd | Construction | 2024 |
| A.C. UK Services Ltd | Construction | 2024 |
| A.D.D. Fisheries Ltd | Hospitality | 2024 |
| A.Hollins Ltd | Construction | 2020 |
| A.J. Brook & Sons Ltd | Transport & logistics | 2013 |
| A.S.W Building Services Ltd | Construction | 2024 |
| A.Schofield(Pontefract)Limited | Administrative & support | 1936 |
| A1 Car Recyclers Limited | Wholesale & retail | 2012 |
| A1 INK Ltd | Wholesale & retail | 2021 |
| A1-METALS Limited | Manufacturing | 2023 |
| Aathiraa Retail Ltd | Wholesale & retail | 2024 |
| Abbey Comms Ltd | Information & communication | 2023 |
| Abbie Baylis PT Ltd | Arts & recreation | 2022 |
| Abdou Couriers Limited | Transport & logistics | 2017 |
| Abdullah Shahzad Ltd | Wholesale & retail | 2025 |
| Abel Bowman & Co Limited | Administrative & support | 2018 |
| ABG Safety Consultancy Limited | Professional & scientific | 2019 |
| ABH Vendors Ltd | Real estate | 2024 |
| Ability Bridge Limited | Information & communication | 2026 |
| Abisamasi Ltd | Health & social care | 2014 |
| ABL Roofing & Cladding Ltd | Construction | 2023 |
| Able K9 Pet Supplies Ltd | Wholesale & retail | 2024 |
| Above & Below Leisure Ltd | Arts & recreation | 2019 |
| ABP Transport Ltd | Transport & logistics | 2016 |
| ABV Racing Limited | Transport & logistics | 2013 |
| Academy of Live Technology Ltd | Education | 2011 |
| Accio Developments Ltd. | Real estate | 2025 |
| Accurate Industrial Doors Limited | Manufacturing | 2011 |
| Ace Homefuels Limited | Wholesale & retail | 2025 |
| Ace K9 Limited | Other services | 2016 |
| Ace Metalworx Limited | Manufacturing | 2020 |
| Ace Motors (South Elmsall) Limited | Wholesale & retail | 1994 |
| Acent Civil Engineering Limited | Construction | 2025 |
| Aces' N Dimensions Limited | Professional & scientific | 2015 |
| Aceweld and Supplies Limited | Professional & scientific | 2025 |
| ACG Group Ltd | Wholesale & retail | 2018 |
| Ackworth Autoserv Limited | Wholesale & retail | 2020 |
| Ackworth Hands Car Wash Ltd | Other services | 2025 |
| Ackworth Rambling School of Excellence Ltd | Arts & recreation | 2020 |
| Ackworth Scaffolding Limited | Construction | 2025 |
| Ackworth School | Education | 2017 |
| ACS Logistics Ltd | Transport & logistics | 2019 |
| Action 2 Change Limited | Education | 2015 |
| Action Cars & Taxis Ltd | Transport & logistics | 2012 |
| Action Services 247 Ltd | Construction | 2024 |
| Active Minds Pontefract Ltd | Public administration | 2021 |
| Active Wellbeing Group CIC | Health & social care | 2026 |
| ACTIVE8 Builders & Joiners Ltd | Construction | 2011 |
| Actum Logistics Ltd | Transport & logistics | 2025 |
| AD Nails & Beauty Limited | Other services | 2026 |
| Adam Plaice Limited | Extraterritorial | 2016 |
| Adamas Academy Ltd | Education | 2025 |
| Adams Restaurant Ltd | Hospitality | 2026 |
| Addy Builders Limited | Construction | 2003 |