| 1010 Boutique Limited | Wholesale & retail | 2018 |
| 122 Ferme Park Road Limited | Households | 2006 |
| 1MULBERRY Care Homes LLP | | 2025 |
| 350 Strategy Limited | Professional & scientific | 2011 |
| 365COACHING Ltd | Other services | 2026 |
| 36J Group Ltd | Water & waste | 2024 |
| 4 Care Services Limited | Health & social care | 2022 |
| 400 Leisure Limited | Other services | 2011 |
| 47A Limited | Real estate | 2013 |
| 48 Power Limited | Energy | 2024 |
| 4ADVENTURES Limited | Professional & scientific | 2018 |
| 4MY Limited | Professional & scientific | 2024 |
| 60STICKS Ltd. | Professional & scientific | 2005 |
| 6396 Ltd | Manufacturing | 2025 |
| 7 Walcot Terrace, Bath Management Company Limited | Households | 2003 |
| A & S Properties (Holmfirth) Ltd | Real estate | 2022 |
| A Biggar Picture Ltd | Wholesale & retail | 2025 |
| A Colley Plumbing & Heating Services Ltd | Construction | 2020 |
| A E Haywood & Sons Limited | Construction | 1999 |
| A H Construction (Holmfirth) Limited | Construction | 2020 |
| A J W Holdings Ltd | Wholesale & retail | 2019 |
| A K Morris Consulting Ltd | Professional & scientific | 2008 |
| A L Construction (Holmfirth) Limited | Construction | 2006 |
| A M Landscapes Limited | Administrative & support | 2014 |
| A M Riley Properties Ltd | Real estate | 2023 |
| A Owens Consulting Limited | Professional & scientific | 2016 |
| A R T Inns Ltd | Hospitality | 2018 |
| A Somerville Limited | Wholesale & retail | 1994 |
| A&M Hospitality Ltd | Hospitality | 2026 |
| A+Dp Architecture+Design Partnership LLP | | 2004 |
| A.B.G. Limited | Manufacturing | 1988 |
| A.J.Lucas Plumbing & Heating Ltd | Other services | 2015 |
| A2W Solutions Ltd. | Information & communication | 2009 |
| AAA Developments (Wakefield) Ltd | Construction | 2019 |
| AAA Investments (Yorkshire) Limited | Real estate | 2013 |
| AAA Investments One Limited | Real estate | 2018 |
| AAA Investments Two Limited | Real estate | 2019 |
| AAA Property (Leeds 28) Ltd | Construction | 2023 |
| AAA Property (Leeds 44) Ltd | Construction | 2021 |
| AAA Property (Leeds 46) Ltd | Construction | 2022 |
| AAA Property Group Limited | Real estate | 2019 |
| AAA Property Limited | Extraterritorial | 2019 |
| AB Glazing Limited | Construction | 2017 |
| AB Infusions Ltd | Wholesale & retail | 2020 |
| ABA Electrical and Property Maintenance Ltd | Construction | 2007 |
| ABA FM Limited | Administrative & support | 2017 |
| Abacus Stone Sales Ltd | Manufacturing | 2024 |
| Abbey Farm House Ltd | Hospitality | 2024 |
| ABC Enterprises Limited | Financial services | 2023 |
| Able Tree Surgeons Ltd | Agriculture & fishing | 2018 |
| Absolutely Gorgeous Accessories Ltd | Wholesale & retail | 2023 |
| Abson Limited | Construction | 2002 |
| ACA Imaging Ltd | Health & social care | 2020 |
| Academic Method Ltd | Education | 2025 |
| Accents of Asia Ltd | Wholesale & retail | 2025 |
| Accomeco Limited | Manufacturing | 2018 |
| Ace Electrical Huddersfield Ltd | Construction | 2014 |
| Ace Family.Uk Limited | Information & communication | 2024 |
| Ace Sports Coaching Ltd | Arts & recreation | 2017 |
| Aceman Limited | Professional & scientific | 1998 |
| Acfg Holdings Limited | Financial services | 2021 |
| Acfg Limited | Extraterritorial | 2021 |
| Achille Ratti Climbing Club Limited | Other services | 2023 |
| Acklam Road Motor Factors Ltd | Wholesale & retail | 2018 |
| ACM Estate Management Limited | Real estate | 2017 |
| ACM Projects Limited | Administrative & support | 2004 |
| ACM Rentals Ltd | Other services | 2020 |
| Acquire Financial Planning Ltd | Financial services | 2017 |
| Acre and Holme Properties Ltd | Real estate | 2022 |
| Action Fraud Limited | Education | 2019 |
| Active Paper Pro Limited | Wholesale & retail | 2022 |
| Acupips Ltd | Health & social care | 2021 |
| Adage Consultancy Limited | Water & waste | 2024 |
| Adam Cartwright Limited | Wholesale & retail | 2003 |
| Addy Murgatroyd Ltd | Professional & scientific | 2019 |
| Addy Murgatroyd Properties Limited | Real estate | 2016 |
| Addy Murgatroyd Services Ltd | Professional & scientific | 2008 |
| Addys Limited | Wholesale & retail | 2003 |
| Adelie Psychology Ltd | Health & social care | 2021 |
| Adgm Limited | Professional & scientific | 2011 |
| ADH Business Services Limited | Professional & scientific | 2023 |
| ADJ Contractors Limited | Construction | 2026 |
| ADMIN4QS Limited | Professional & scientific | 2007 |
| ADP Architecture and Design Ltd | Professional & scientific | 2016 |
| Advanced Flight Training Limited | Education | 2009 |
| African Fabric Shop Ltd | Wholesale & retail | 2014 |
| Aftermarket Advocates Ltd | Professional & scientific | 2016 |
| AGC Security Consultants Ltd | Administrative & support | 2016 |
| AGT Consultancy Limited | Professional & scientific | 2023 |
| AGW Financial Planning Ltd | Professional & scientific | 2020 |
| AHU Management Limited | Extraterritorial | 2008 |
| AIM High Consulting Limited | Professional & scientific | 2012 |
| Airmatic Systems Limited | Construction | 2003 |
| AJB Plumbing and Heating (Yorkshire) Ltd | Construction | 2023 |
| AJS Datasolutions Limited | Information & communication | 2006 |
| AKB Environmental Limited | Hospitality | 2014 |
| Akins Properties Limited | Real estate | 2019 |
| Akudo Ltd | Real estate | 2019 |
| Alan Frost Pattern Makers Limited | Extraterritorial | 1995 |
| Alan Pearson and SON Limited | Administrative & support | 2001 |