| 007 Developments Ltd | Real estate | 2026 |
| 1858 Bar & Restaurant Ltd | Hospitality | 2022 |
| 1979 MJ Limited | Financial services | 2021 |
| 1ST Accountancy Solutions Ltd | Professional & scientific | 1999 |
| 20 Waterside Ltd | Hospitality | 2024 |
| 2D2C Property Investment Ltd | Real estate | 2022 |
| 32 Kent Road Ltd | Households | 2024 |
| 4 Seasons (Yorkshire) Limited | Wholesale & retail | 2007 |
| 42 Digital Media Ltd | Professional & scientific | 2014 |
| 94-96 High Street Limited | Real estate | 2021 |
| A & S Keal Limited | Financial services | 2019 |
| A Casa DI Alessia Limited | Hospitality | 2020 |
| A Jelly Race Ltd | Hospitality | 2021 |
| A L Engineering Services Ltd | Water & waste | 2008 |
| A M Ahmad Investments Ltd | Real estate | 2020 |
| A M Ahmad Ltd | Professional & scientific | 2020 |
| A Reed Ltd | Financial services | 2019 |
| A W Dent Ltd | Professional & scientific | 2012 |
| A.G.A Plumbing Limited | Construction | 2021 |
| A.M Electrical Harrogate Ltd | Construction | 2012 |
| A.S Autoworks Limited | Wholesale & retail | 2025 |
| A1 Concrete (Harrogate) Ltd | Manufacturing | 2017 |
| AA Property Solutions (UK) Limited | Construction | 2014 |
| Ab&J Properties Ltd | Real estate | 2020 |
| Abbey Mill Investments Ltd | Administrative & support | 2021 |
| Abbey Road (Knaresborough) Management Company Ltd | Real estate | 2021 |
| Abbey Works Limited | Real estate | 2011 |
| Aberford Agencies Ltd | Real estate | 2014 |
| Absolute UFH & Screed Ltd | Construction | 2020 |
| Acanthus Contracts Limited | Wholesale & retail | 1993 |
| Access Underwater Ltd | Construction | 2012 |
| Ace Brickwork Contractors Limited | Construction | 2023 |
| Aceso Clinical Services Limited | Professional & scientific | 2011 |
| Acorn Property Enterprises Ltd | Real estate | 2019 |
| Acrs Properties Limited | Hospitality | 2024 |
| ACT Commercial Property Ltd | Administrative & support | 2019 |
| AD 2026 Ltd | Wholesale & retail | 2026 |
| Adams Infra Holdings Limited | Financial services | 2025 |
| Adams Infra Limited | Professional & scientific | 2024 |
| Adapted Developments Ltd | Real estate | 2019 |
| Adapted Ltd | Construction | 2021 |
| Adapted Projects Ltd | Construction | 2024 |
| Addymans Recycling Ltd | Water & waste | 2017 |
| Adrian Pearson (Agencies) Ltd | Wholesale & retail | 2004 |
| Adriana Florina Healthcare Resources Limited | Health & social care | 2017 |
| Advance Motors (Leeds) Ltd | Extraterritorial | 1979 |
| Advance Product Services Ltd. | Manufacturing | 2002 |
| Aeroscene Aviation LLP | | 2023 |
| Aeroscene Limited | Administrative & support | 2002 |
| Afro-Nija Kitchen Ltd | Hospitality | 2025 |
| AFT Garden Services Ltd | Administrative & support | 2026 |
| After Hours Harrogate Ltd | Wholesale & retail | 2024 |
| Agrisense Industrial Monitoring Limited | Manufacturing | 2015 |
| AI Earthworks Ltd | Construction | 2025 |
| Aimes Health and Beauty Limited | Other services | 2012 |
| Ainsty Property Ltd | Real estate | 2025 |
| Aire Properties Limited | Real estate | 2003 |
| Albert & Co Automotive Solutions Ltd | Professional & scientific | 2023 |
| Alex Gates Online Consultancy Limited | Other services | 2022 |
| ALL Containers Great and Small Limited | Real estate | 2021 |
| ALL Glass & Mirrors Ltd | Construction | 2024 |
| Allen Francis Ltd | Wholesale & retail | 2020 |
| Allenhurst Solutions Limited | Professional & scientific | 2011 |
| Allerton Castle Limited | Real estate | 2020 |
| Allerton Park Horse Trials LLP | | 2012 |
| Allerton Park Trading Limited | Hospitality | 2023 |
| ALM Group Limited | Professional & scientific | 2016 |
| ALM Manufacturing Limited | Manufacturing | 1996 |
| ALT Dance Ltd | Education | 2023 |
| Alym Estates Ltd | Real estate | 2021 |
| AMA Dentcare Ltd | Health & social care | 2017 |
| Amari Enterprises Ltd | Construction | 2026 |
| Ambitious Group Contracting Limited | Administrative & support | 2021 |
| Amhza Limited | Health & social care | 2023 |
| Andrew Bull Insurance Services Ltd | Financial services | 2015 |
| Andway Healthcare Ltd | Wholesale & retail | 2010 |
| Andway Servicing Ltd | Professional & scientific | 2022 |
| APF Electrics Ltd | Construction | 2021 |
| Apollo Creative Ltd | Manufacturing | 2010 |
| Appleby Development Consultancy Ltd | Professional & scientific | 2019 |
| Appleton Business Advisors Limited | Professional & scientific | 2020 |
| Aquila Industrial Cleaning Limited | Administrative & support | 2020 |
| Arabo Medical Consulting Limited | Health & social care | 2009 |
| Archigraph Limited | Real estate | 1995 |
| Armitage House Ltd | Real estate | 2024 |
| Arrowsmith Associates LLP | | 2012 |
| Arthur Atkinson (Knaresborough) Limited | Wholesale & retail | 2014 |
| Arthur Atkinson (Summerbridge) Limited | Wholesale & retail | 1934 |
| Artisan Asset Limited | Construction | 2021 |
| Artisan Droitwich Spa Limited | Construction | 2021 |
| Artisan Enterprises Limited | Construction | 2022 |
| AS & MS Pedel LLP | | 2023 |
| Ashcourt Acquisitions Ltd | Transport & logistics | 2021 |
| Ashcourt Holdings Yorkshire Limited | Real estate | 2021 |
| Ashcourt Metals Ltd | Wholesale & retail | 2025 |
| Ashtons Automotive Ltd | Wholesale & retail | 2019 |
| Aspin Park Early Years Group Limited | Administrative & support | 2011 |
| ASQ Financial Services Limited | Financial services | 2019 |
| Atlantis House Holdings Ltd | Real estate | 2022 |
| Attollo Services Ltd | Administrative & support | 2021 |