| 03681154 Limited | Wholesale & retail | 1998 |
| 18 SIX Event Consultants Ltd | Professional & scientific | 2017 |
| 19TH Hole @ DGC Limited | Hospitality | 2016 |
| 1ST Call Recovery (Skipsea ) Limited | Real estate | 2026 |
| 1ST Call Recovery Limited | Agriculture & fishing | 2008 |
| 1ST Defence Fabrications Limited | Manufacturing | 2008 |
| 24/7 Security and Events Ltd | Administrative & support | 2015 |
| 3 Peaks Digital Limited | Professional & scientific | 2021 |
| 3P Design & Company Limited | Wholesale & retail | 1967 |
| 4P Agriculture Limited | Agriculture & fishing | 2011 |
| 53 Tennyson Avenue Management Company Limited | Real estate | 2012 |
| 5C Designs Ltd | Professional & scientific | 2023 |
| 7MEDALMOUNTING Ltd | Wholesale & retail | 2020 |
| A & G Residential Limited | Real estate | 2021 |
| A C Windows (Beverley) Limited | Construction | 2003 |
| A K Refrigeration Limited | Professional & scientific | 2006 |
| A Little Piece of Land CIC | Education | 2023 |
| A M K Fuel Services Ltd | Wholesale & retail | 2002 |
| A M Safety Services Limited | Professional & scientific | 2013 |
| A M Skips (Yorkshire) Limited | Administrative & support | 2006 |
| A N Holmes Plumbing & Heating Contractor Ltd | Wholesale & retail | 2002 |
| A T V Applications Ltd | Agriculture & fishing | 2018 |
| A Twist in the Tale CIC | Wholesale & retail | 2024 |
| A. R. I. Environmental Services Limited | Other services | 1999 |
| A. S. Chappell & SON Ltd. | Wholesale & retail | 2002 |
| A. Smith Electrical Services Limited | Construction | 2015 |
| A.E. & J.C. Roofing Limited | Construction | 2021 |
| A.J.Steel Fabrications Limited | Manufacturing | 2001 |
| A.M. Warkup Limited | Construction | 2002 |
| A.N.D Civils Ltd | Construction | 2016 |
| A.P. Printing & Stationery Limited | Wholesale & retail | 2013 |
| A1 Valets Ltd | Administrative & support | 2025 |
| A121 Training Ltd | Professional & scientific | 2021 |
| AA SET Ltd | Households | 2021 |
| Abbeywold Limited | Wholesale & retail | 2016 |
| Abbotsford Ltd | | 1995 |
| Abbs Trims & Things Ltd | Construction | 2017 |
| Absolutely Shaw Limited | Wholesale & retail | 1996 |
| AC & CE Skelton Limited | Transport & logistics | 2002 |
| Academic Soulcraft Limited | Education | 2024 |
| Ad-Bench U.K. Limited | Extraterritorial | 1995 |
| ADB Healthcare Limited | Wholesale & retail | 2010 |
| ADR Engineering & Lifting Limited | Manufacturing | 2014 |
| ADR Surveying Limited | Professional & scientific | 2010 |
| Adventure Parks Limited | Arts & recreation | 2021 |
| Aegis East Yorkshire LLP | | 2014 |
| Aegis Martial Arts East Yorkshire Limited | Education | 2014 |
| Aerial Defence Ltd | Professional & scientific | 2021 |
| Affordable Cars (Driffield) Limited | Wholesale & retail | 2015 |
| Affordable Choices Limited | Extraterritorial | 2002 |
| AG Catfoss Ltd | Real estate | 2019 |
| AGG Business Solutions Ltd | Professional & scientific | 2025 |
| Agri Sandflow Systems Ltd | Wholesale & retail | 2026 |
| Agri-Consulting Limited | Professional & scientific | 2022 |
| Agri-Sense Limited | Professional & scientific | 2014 |
| Agricola Bottling Limited | Manufacturing | 2010 |
| Agricultural Laboratory Services Limited | Agriculture & fishing | 2023 |
| Agriv Workwear Ltd | Manufacturing | 2023 |
| Agriweld Limited | Manufacturing | 2003 |
| Agronomy Supplies Limited | Agriculture & fishing | 2011 |
| AJ Offshore Wind Ltd | Construction | 2026 |
| AJ Reddy Limited | Professional & scientific | 2019 |
| AJD Farms Limited | Agriculture & fishing | 1996 |
| AKT Imaging Supplies Limited | Wholesale & retail | 2008 |
| Aldgate Holdings Ltd | Financial services | 2023 |
| Aldgate Veterinary Practice Ltd | Professional & scientific | 2012 |
| Alec W G Hall Limited | Wholesale & retail | 2021 |
| Alert CMS Limited | Professional & scientific | 2013 |
| Alex Derevon Ltd | Construction | 2025 |
| ALI Bilton IP Holdings Ltd | Information & communication | 2019 |
| Allan Binks Timber Limited | Wholesale & retail | 1983 |
| Allsorts (Driffield) LLP | | 2014 |
| Alpha Digital Radio Limited | Information & communication | 2024 |
| Alphasite Limited | Professional & scientific | 2006 |
| Alternative Financial Advice Limited | Professional & scientific | 2020 |
| Amie Jolly Ltd | Other services | 2025 |
| Anchor Point Management Limited | Households | 2002 |
| Andrew Corrigan Ltd | Agriculture & fishing | 2017 |
| Andromeda Health Limited | Health & social care | 2022 |
| Andy Watts Consulting Partnership Limited | Professional & scientific | 2017 |
| Angilou Upholstery Ltd | Other services | 2020 |
| Animal Technology Limited | Manufacturing | 2025 |
| Anjel Solutions Ltd | Information & communication | 2023 |
| ANN Gravells Limited | Education | 2010 |
| Annie Plant Hire Limited | Administrative & support | 2016 |
| Antlin Holdings Limited | Real estate | 2024 |
| Antlin Property Ltd | Construction | 2025 |
| Apis Regina Consulting Limited | Administrative & support | 2019 |
| Apple Food Systems Limited | Manufacturing | 2011 |
| Apple Removals Limited | Transport & logistics | 2025 |
| Aptek (UK) Limited | Administrative & support | 2000 |
| Aqueduct Plumbing Solutions Ltd | Construction | 2017 |
| ARB Accountancy Services Ltd | Professional & scientific | 2022 |
| Ardella Investments Limited | Real estate | 2022 |
| Arden House Residential Home Ltd | Health & social care | 2002 |
| Arthur Leslie Limited | Professional & scientific | 2007 |
| Artley Plumbing and Bathrooms Ltd | Construction | 2023 |
| ASC Developments (Brandesburton) Ltd | Construction | 2003 |
| Ascertain (GB) Limited | Agriculture & fishing | 2005 |
| Ashlie Prescott Family Law & Mediation Limited | Professional & scientific | 2015 |