| 25BEYOND Limited | Professional & scientific | 2025 |
| 33 Victory Ltd | Arts & recreation | 2024 |
| 37 Fairholme Road Residents Association Limited | Real estate | 1987 |
| 3A-SPACES Ltd | Real estate | 2026 |
| 440 Distribution Limited | Wholesale & retail | 2010 |
| 5 Deep Limited | Administrative & support | 2001 |
| 5 for Silver Limited | Extraterritorial | 2013 |
| 6 to 8 Boroughgate Property Management Limited | Professional & scientific | 2017 |
| 689 Ltd | Administrative & support | 2025 |
| 800 LB Gorilla Limited | Professional & scientific | 2009 |
| 86 Leeds Road RTM Company Limited | Households | 2017 |
| 8X Ltd | Professional & scientific | 2016 |
| A & K Kennels Ltd | Other services | 2013 |
| A 2 B Motorcycle Training (Harrogate) Limited | Education | 2010 |
| A 2 B Motorcycle Training Limited | Education | 2010 |
| A G Excavations Ltd | Construction | 2021 |
| A Handley IR Limited | Arts & recreation | 2021 |
| A Place Beyond Ltd. | Professional & scientific | 2001 |
| A Sezer IR Limited | Real estate | 2022 |
| A Tate Developments Ltd | Construction | 2024 |
| A Tate Properties Limited | Real estate | 2020 |
| A.M. Equestrian Ltd | Agriculture & fishing | 2024 |
| A.M.Laverty & Co.,Limited | Wholesale & retail | 1958 |
| Aaran Metal Fabrications Ltd | Manufacturing | 2018 |
| Aaran Steel Services Ltd | Manufacturing | 2024 |
| AB OPS Solutions Ltd | Information & communication | 2024 |
| ABL (South West) Ltd | Professional & scientific | 2018 |
| ABL Business Ltd | Professional & scientific | 2013 |
| ABL Capital Ltd | Financial services | 2012 |
| Abode Construction (Otley) Limited | Construction | 2018 |
| Absolute Coldroom Limited | Construction | 2009 |
| AC & CC Investments Ltd | Other services | 2023 |
| Ace Fabrications (Yorkshire) Ltd | Professional & scientific | 2019 |
| Acorn Dental (York) Limited | Health & social care | 2015 |
| Acrecliffe Equichange CIC | Other services | 2024 |
| Active Tagging Limited | Wholesale & retail | 2007 |
| AD Safety Services Limited | Administrative & support | 2019 |
| Adamor Limited | Real estate | 2025 |
| Addison Coates Limited | Real estate | 2026 |
| Adel Wills Ltd | Financial services | 2016 |
| Adrian Johnson Limited | Professional & scientific | 2012 |
| ADS (Yorkshire) Limited | Professional & scientific | 2014 |
| Advanced Consultancy in Education Limited | Education | 2013 |
| Advanteq Ltd | Professional & scientific | 2011 |
| Advice Matters Financial Planning Ltd | Financial services | 2017 |
| AE General Builder Ltd | Construction | 2022 |
| AEI Electrical Limited | Construction | 2011 |
| Afjm Investments Limited | Financial services | 2023 |
| Agate Consultants Limited | Professional & scientific | 2018 |
| Agile Pixel Limited | Information & communication | 2013 |
| AH & RT LLP | | 2017 |
| AHJ Properties Limited | Hospitality | 2022 |
| AI First Movers Ltd | Other services | 2023 |
| Aich Limited | Health & social care | 2023 |
| Aire Services Limited | Extraterritorial | 2003 |
| Aire Valley Flooring Limited | Construction | 2023 |
| Aire Van Centre Ltd | Wholesale & retail | 2003 |
| Airvest Ltd | Wholesale & retail | 2012 |
| Ajfm Holdings Limited | Information & communication | 2023 |
| Ajroxx Ltd | Wholesale & retail | 2019 |
| AJS Services Ltd | Professional & scientific | 2021 |
| Akers Properties Ltd | Financial services | 2018 |
| Alan Broadwell Ltd | Financial services | 2014 |
| Alcedo Selection Limited | Administrative & support | 2021 |
| Alex Sewter Editorial Limited | Information & communication | 2015 |
| ALL Terrain Group Ltd | Wholesale & retail | 2024 |
| Almond Gardening Services Limited | Wholesale & retail | 2017 |
| Almscroft Limited | Professional & scientific | 2012 |
| Alpha Tiling Solutions Ltd | Construction | 2023 |
| Alpine Refuge Ltd | Wholesale & retail | 2022 |
| Always Home Solutions Ltd | Information & communication | 2016 |
| Amanda Devi Communications Limited | Information & communication | 2016 |
| Amaracre Ltd | Real estate | 2021 |
| AMG Search & Selection Limited | Administrative & support | 2017 |
| AMH Servicing Limited | Manufacturing | 2018 |
| AMY Mathews Limited | Real estate | 1995 |
| Andrew Hillas Properties Limited | Construction | 1996 |
| Andrew Smith Technology Solutions Limited | Information & communication | 2023 |
| Andy MAC IT (Bingley) Limited | Information & communication | 2018 |
| Andy Shack Ltd | Construction | 2018 |
| Angela Wilkinson HR Ltd | Administrative & support | 2026 |
| Annecto Marketing Ltd | Information & communication | 2016 |
| Antalya Barbers Shop Ltd | Other services | 2022 |
| Anticline CS Ltd | Professional & scientific | 2019 |
| Aoonea Ltd | Financial services | 2026 |
| Apollo Junction Ltd | Information & communication | 2020 |
| Apparel Leeds Limited | Wholesale & retail | 2017 |
| Appointify AI Ltd | Professional & scientific | 2025 |
| Apricus Developments Limited | Construction | 2023 |
| APW Engineering Consultants Ltd | Professional & scientific | 2014 |
| Aquavita UK Limited | Real estate | 2001 |
| ARC Executive Headhunters Ltd | Administrative & support | 2020 |
| Arep Consulting Ltd | Professional & scientific | 2012 |
| Armitage Property Holdings Ltd | Real estate | 2025 |
| Armstrong Siddeley Limited | Manufacturing | 2020 |
| Artemis Aesthetic Limited | Health & social care | 2011 |
| Artemis Aesthetic Medical Ltd | Health & social care | 2016 |
| Artemis Surgical Ltd | Financial services | 2026 |
| Arteutile Limited | Hospitality | 2003 |
| Arthington Cricket Club Ltd | Arts & recreation | 2026 |