| 100 & First Limited | Professional & scientific | 2020 |
| 100% Tiling Limited | Construction | 2018 |
| 128 Wetherby Road Management Company Limited | Households | 2015 |
| 1NEN Holdings Limited | Real estate | 2017 |
| 2 Degree Field Ltd | Wholesale & retail | 2010 |
| 20TH Century Clothiers Limited | Wholesale & retail | 2009 |
| 26 Exchange Street East Management Company Limited | Households | 2015 |
| 27 - 35 Duke Street Management Company Limited | Construction | 2005 |
| 308 Ability Ltd | Real estate | 2018 |
| 6040 Ltd | Extraterritorial | 2024 |
| 62 Leeds Management Company Limited | Real estate | 2018 |
| 9893 Co Limited | Wholesale & retail | 2026 |
| A & G Motor Engineers 2014 Ltd | Wholesale & retail | 2014 |
| A & V Caine Ltd | Wholesale & retail | 2024 |
| A & Z Best Food and Wine Ltd | Wholesale & retail | 2016 |
| A B 2011 Limited | Real estate | 2012 |
| A-Fax Limited | Manufacturing | 2017 |
| A-Guard Ltd | Manufacturing | 2020 |
| A-Safe Group Holdings Limited | Manufacturing | 2022 |
| A-Safe Group Ltd | Manufacturing | 1983 |
| A-Safe HQ Ltd | Manufacturing | 2005 |
| A-Safe International Ltd | Manufacturing | 2016 |
| A-Safe Limited | Professional & scientific | 1999 |
| A-Safe UK Ltd | Manufacturing | 2016 |
| A. & G. Motor Engineers Limited | Wholesale & retail | 1982 |
| A. & I. Woodhouse Limited | Professional & scientific | 1979 |
| A.B.Y. Knitting Co. Limited | Manufacturing | 2010 |
| A.E.Chesswas & SON Limited | Professional & scientific | 1953 |
| A.F. Connell Limited | Construction | 1988 |
| Aakash Balti Knaresborough Limited | Hospitality | 2018 |
| ABC Fire Protection (Halifax) Limited | Administrative & support | 2005 |
| ABM Developments (Yorkshire) Limited | Construction | 2007 |
| Accept Car Credit Limited | Financial services | 2004 |
| Accept Cards Limited | Financial services | 2017 |
| Accept Cards Trustees Limited | Administrative & support | 2023 |
| Accident & Injury Helpline Limited | Professional & scientific | 2010 |
| Ace Van Conversions Ltd | Manufacturing | 2026 |
| Acegrange Limited | Wholesale & retail | 2017 |
| ACG Control Systems Ltd | Manufacturing | 2024 |
| Acraman (418) Limited | Professional & scientific | 2006 |
| ACS Asbestos Removal Services Ltd | Construction | 2012 |
| ACS Health,Safety & Environment Limited | Construction | 2008 |
| Active Build Ltd | Construction | 2025 |
| AD Transport & Commercial Repairs Limited | Administrative & support | 2016 |
| Adam Halifax Ltd | Wholesale & retail | 2022 |
| Advance Clean HX Ltd | Other services | 2023 |
| Advance Engineering (HX) Ltd | Manufacturing | 2002 |
| Advanced Mechanical Projects Ltd | Manufacturing | 2016 |
| Advantage Distribution Ltd | Transport & logistics | 2013 |
| AHALFABET123 Limited | Administrative & support | 2017 |
| Air Distribution Limited | Construction | 2010 |
| Air Logistics Management Company Limited | Real estate | 2022 |
| Airbourne Construction Limited | Construction | 2017 |
| Aire Shannon Limited | Households | 1979 |
| Aivastark Ltd | Information & communication | 2026 |
| AJ Walkden Ltd | Other services | 2017 |
| AJD Consultancy Ltd | Professional & scientific | 2023 |
| AJH Analytics Limited | Information & communication | 2012 |
| AK Leisure Group Limited | Arts & recreation | 2016 |
| Akhtars Restaurant Ltd | Hospitality | 2024 |
| Alan Higgins Ltd | Health & social care | 2017 |
| Albert Mills Management Company Limited | Households | 2006 |
| ALE House PUB Company (Commercial) Limited | Hospitality | 2013 |
| Alexamanda Healthcare PVT Ltd | Health & social care | 2014 |
| Ali-Fix Limited | Construction | 2019 |
| Allendale Court Management Co. (Lancashire) Limited | Extraterritorial | 2006 |
| Allergia Ltd | Health & social care | 2022 |
| Alliance Fire Protection (North) Ltd | Other services | 2010 |
| Allied Building Services UK Limited | Construction | 2001 |
| Alma's Ethical Cakes and Bakes Ltd | Extraterritorial | 2023 |
| Alpha Cooling Limited | Construction | 2019 |
| Alton Glasshouses Limited | Professional & scientific | 2010 |
| Alvin Plumb Services Ltd | Construction | 2019 |
| Alzin Engineering Limited | Manufacturing | 1973 |
| Amarla Real Estate Limited | Professional & scientific | 2025 |
| AMG Autolease Ltd | Administrative & support | 1962 |
| AMK Electrical Installation Limited | Construction | 2018 |
| Anacarda Limited | Manufacturing | 2012 |
| Andy Cooper Engineering Limited | Manufacturing | 2016 |
| Andy Thornton (at) Limited | Manufacturing | 2020 |
| Andy Thornton Limited | Manufacturing | 2005 |
| Anisha and Ayanda Ltd | Administrative & support | 2026 |
| Anon Lingerie Ltd | Wholesale & retail | 2025 |
| ANY Travel Ltd | Administrative & support | 2024 |
| Apex Autoxchange Ltd | Wholesale & retail | 2025 |
| Apex Motor Solutions Group Ltd | Wholesale & retail | 2026 |
| Arcadia Textiles Limited | Wholesale & retail | 2009 |
| Areera Recycling Holdings Ltd | Water & waste | 2026 |
| Arkam a Ltd | Health & social care | 2018 |
| Art and Soles Ltd | Wholesale & retail | 2015 |
| Ashby's Elland Limited | Hospitality | 2022 |
| Aspire Service Contractors Ltd | Construction | 2025 |
| ASQ Associates Ltd | Financial services | 2019 |
| Assembly Marketing Limited | Professional & scientific | 2017 |
| Assured Fire Services Ltd | Administrative & support | 2013 |
| Astaroth Ltd | Information & communication | 2022 |
| ATG Building and Landscaping Limited | Construction | 2010 |
| Athar Tech Ltd | Information & communication | 2023 |
| Atiz Ltd | Wholesale & retail | 2022 |
| Atlas Machine Knives Limited | Manufacturing | 2003 |