| 0XF-SECURITY Limited | Information & communication | 2023 |
| 1 Call Accountants Limited | Professional & scientific | 2006 |
| 153 Cragside Walk Limited | Real estate | 2024 |
| 1ST Next Stop Store Ltd | Wholesale & retail | 2026 |
| 2025 Holdings Ltd | Construction | 2022 |
| 21ALC Ltd | Financial services | 2024 |
| 247 Taxi Service Ltd | Transport & logistics | 2020 |
| 345 Data Ltd | Professional & scientific | 2022 |
| 3AM-AN Ltd | Professional & scientific | 2017 |
| 49 Properties Limited | Real estate | 2017 |
| 5 Towns Plumbing & Heating Contractors Limited | Administrative & support | 2006 |
| 5 Towns Property Solutions Ltd | Construction | 2015 |
| 6-10 Montrose Gardens RTM Company Limited | Households | 2010 |
| 911 Targa Ltd | Information & communication | 2026 |
| 96 Property Ventures Limited | Households | 2025 |
| 9JAFOODS Ltd | Hospitality | 2026 |
| A & G Signs Limited | Manufacturing | 2005 |
| A & G Signs Properties Limited | Real estate | 2014 |
| A & R Evolve Developments Limited | Real estate | 2025 |
| A Gift of Happiness Limited | Wholesale & retail | 2017 |
| A Higgins Hire Limited | Administrative & support | 2019 |
| A Higgins Limited | Transport & logistics | 2019 |
| A R Design and Development Limited | Information & communication | 2015 |
| A&I Property Rental Ltd | Households | 2025 |
| A-Trans Freight Ltd | Transport & logistics | 2025 |
| A.D.I. Industrial Supplies Limited | Transport & logistics | 2008 |
| A.M.P. Foods Limited | Administrative & support | 1995 |
| A.P.R. Morris Limited | Financial services | 2020 |
| A11YTEST.AI Ltd | Information & communication | 2026 |
| A2B Plant and Rail Services Ltd | Manufacturing | 2025 |
| A4POWER Limited | Manufacturing | 2023 |
| AA Services Yorkshire Ltd | Wholesale & retail | 2021 |
| AAA Cars Castleford Ltd | Administrative & support | 2017 |
| AAA Dwellings Castleford Ltd | Households | 2021 |
| AAA Taxi Rentals Ltd | Transport & logistics | 2022 |
| Abbey Event Services Limited | Administrative & support | 2016 |
| Abcd Dance Studios Ltd | Arts & recreation | 2015 |
| ABS Hand Carwash Ltd | Administrative & support | 2025 |
| Acacia Joinery Services Ltd | Construction | 2009 |
| Access Contracting Limited | Professional & scientific | 1996 |
| Accountsaide (Yorkshire) Limited | Professional & scientific | 2013 |
| Acescott Specialist Services Limited | Professional & scientific | 2008 |
| ACL Refrigeration & Air Conditioning Ltd | Manufacturing | 2010 |
| Acorn Joinery (Leeds) Limited | Construction | 2017 |
| Actavis Holdings UK II Limited | Manufacturing | 1998 |
| Actavis Holdings UK Ltd. | Administrative & support | 2004 |
| Actavis UK Group Limited | Professional & scientific | 2015 |
| ACTIV8 Accounting Ltd | Professional & scientific | 2019 |
| ACTIV8 Payroll Limited | Professional & scientific | 2022 |
| ACW Lifting Limited | Professional & scientific | 2019 |
| Adam Convenience Store Ltd | Wholesale & retail | 2025 |
| Adam Jake Goldthorpe Ltd | Transport & logistics | 2026 |
| Adam Store 1 Ltd | Wholesale & retail | 2026 |
| Adnath Healthcare Ltd | Health & social care | 2024 |
| ADP Environmental Services Ltd | Manufacturing | 2018 |
| ADP Safety Supplies Limited | Wholesale & retail | 2009 |
| AE Plant Repairs Limited | Manufacturing | 2022 |
| AER Support Limited | Information & communication | 2004 |
| Aerosite Ltd | Professional & scientific | 2025 |
| Aether Gardens Ltd | Financial services | 2024 |
| AG Signs Limited | Extraterritorial | 2005 |
| Agape Family Holdings Ltd | Households | 2020 |
| AGE UK Wakefield District Enterprises Limited | Health & social care | 2013 |
| Ahmed's Property Solutions Ltd | Construction | 2020 |
| Air Freight Solutions Ltd | Transport & logistics | 2019 |
| Aire (Holdings) Ltd | Professional & scientific | 1986 |
| Airedale Amateur Boxing Club CIC | Arts & recreation | 2025 |
| Airedale Community Trading (ACT) Ltd | Water & waste | 2005 |
| AJ Property Training Ltd | Information & communication | 2018 |
| Ajax Properties (Yorkshire) Ltd | Real estate | 2018 |
| AJB ( UK ) Ltd | Professional & scientific | 2016 |
| AJH LED Lighting Ltd | Manufacturing | 2021 |
| AK Oils Ltd | Wholesale & retail | 2020 |
| AK Wiles Holdings Limited | Real estate | 2023 |
| Aketon Partners Limited | Professional & scientific | 2025 |
| Alan Morrison TM Ltd | Transport & logistics | 2015 |
| Alan's Barber 46 Ltd | Other services | 2023 |
| ALL Seasons Roofing and Guttering Ltd | Construction | 2025 |
| ALL Shape UP Ltd | Other services | 2021 |
| All-Pro Sports & Wellbeing Limited | Health & social care | 2023 |
| Allcare Mobility Limited | Wholesale & retail | 2003 |
| Allerton Burgers and Shakes Ltd | Hospitality | 2019 |
| Allerton Express Pizza Ltd | Hospitality | 2023 |
| Allied 4 Vans (Hire) Limited | Wholesale & retail | 2013 |
| Allied Aggregates (Northern) Limited | Administrative & support | 2009 |
| Allied Plant Limited | Administrative & support | 1999 |
| Allisons Home & Garden Limited | Wholesale & retail | 2012 |
| Almantis Foods Ltd | Manufacturing | 2026 |
| Almantis Limited | Real estate | 2024 |
| Almantis Merchant Limited | Wholesale & retail | 2025 |
| Alphamore Corporation Ltd | Financial services | 2000 |
| Alpheta Design Limited | Other services | 2018 |
| Alpino Steak and Shakes Ltd | Wholesale & retail | 2019 |
| Alternative Software Limited | Information & communication | 1986 |
| Altofts CUT Private Moorings Limited | Arts & recreation | 2012 |
| Amazonista Hospitality Limited | Hospitality | 2025 |
| Ambler Financial Services Ltd | Financial services | 2024 |
| Amico IT Ltd | Information & communication | 2017 |
| Amore Holidays Ltd | Administrative & support | 2024 |
| Andrea's Healing & Wellbeing Centre Limited | Health & social care | 2024 |