| (NOT) Forever Yone Ltd | Arts & recreation | 2021 |
| 121BOOTFERRY Limited | Other services | 2015 |
| 16849219 Ltd | Administrative & support | 2025 |
| 1860 Interiors Ltd | Wholesale & retail | 2019 |
| 1ST Practice Limited | Health & social care | 2004 |
| 2XL UK Limited | Transport & logistics | 2016 |
| 34 Davenport Avenue Limited | Households | 2018 |
| 4 Seasons Tyres Ltd | Wholesale & retail | 2025 |
| @NO1 the Educators Ltd | Education | 2020 |
| A G Exon Limited | Wholesale & retail | 2018 |
| A K Building Services Limited | Construction | 2003 |
| A K Sheet Metal Fabrications Limited | Manufacturing | 1997 |
| A&C Recruitment Group Ltd | Administrative & support | 2026 |
| A.P. Menswear Limited | Wholesale & retail | 2020 |
| A64 Hand Car Wash Limited | Other services | 2016 |
| AB School of Dance Limited | Arts & recreation | 2022 |
| AB Social Work Services Limited | Health & social care | 2019 |
| AB Squared Limited | Professional & scientific | 2021 |
| Abel & Cole Limited | Wholesale & retail | 2000 |
| Absail Roofing Ltd | Construction | 2006 |
| AC Global Recruitment Ltd | Administrative & support | 2026 |
| Accountscloud Limited | Professional & scientific | 2017 |
| Acorn Associates Inc. Limited | Financial services | 2006 |
| Active Claim Services Limited | Construction | 2001 |
| Adams and Green Holdings Limited | Financial services | 2025 |
| Adams and Green Limited | Manufacturing | 2011 |
| Admiral Roofing Specialists Limited | Construction | 2018 |
| Advanced Care Yorkshire Training Limited | Health & social care | 2014 |
| Aerman Ltd | Real estate | 2022 |
| Affinity Podiatry LLP | | 2023 |
| Afford Recruitment Ltd | Construction | 2018 |
| Ahead in HR Limited | Professional & scientific | 2016 |
| AI Enterprise Hull Limited | Hospitality | 2024 |
| Air Dice Services (UK) Limited | Information & communication | 2016 |
| AJ Ward Investments Ltd | Real estate | 2024 |
| AJK Properties Hull Ltd | Households | 2025 |
| Ajmonk Limited | Hospitality | 2026 |
| AJR Consulting Ltd | Professional & scientific | 2026 |
| Akjlts Holding Limited | Financial services | 2025 |
| AKN Home Improvement Ltd | Construction | 2019 |
| Alamo Legal Enforcement Services Limited | Administrative & support | 2016 |
| Alan Bangs Ltd | Construction | 2022 |
| Albies Bar Limited | Wholesale & retail | 2023 |
| Albion Consulting Engineers Limited | Construction | 2022 |
| Aletheo Contracting & Consultancy Ltd | Professional & scientific | 2025 |
| Alfila Property Limited | Real estate | 2023 |
| Alford Limited | Extraterritorial | 2010 |
| ALL Interior Solutions Ltd | Construction | 2022 |
| Alsquared Ltd | Financial services | 2025 |
| Alterever Limited | Manufacturing | 1998 |
| Amity Coffee Limited | Hospitality | 2025 |
| AMK Homes Ltd | Real estate | 2017 |
| Anagen Therapies Limited | Other services | 2022 |
| Anand Medical Ltd | Health & social care | 2026 |
| Ancient Recipes Limited | Extraterritorial | 1992 |
| Anderson Management Consultancy Limited | Professional & scientific | 2024 |
| Andrew Palmer Consultancy Limited | Professional & scientific | 2016 |
| Anklita Limited | Wholesale & retail | 2018 |
| Anlaf Limited | Construction | 2021 |
| AP Professional Development Ltd | Education | 2026 |
| APG (Hull) Limited | Construction | 2024 |
| Applied Psychologies Trustees Limited | Professional & scientific | 2022 |
| Apus Productions Limited | Arts & recreation | 2014 |
| AQ Client Services Limited | Professional & scientific | 2013 |
| Aquatic Distribution Services Ltd | Wholesale & retail | 2026 |
| Aquatik Limited | Construction | 2016 |
| Arcs & Sparks Electrical Ltd | Construction | 2009 |
| Argg Access Solutions Limited | Professional & scientific | 2014 |
| Armartronic Limited | Information & communication | 1988 |
| Armstrong Natural Walling Limited | Wholesale & retail | 2023 |
| Arnott Building Services Ltd | Construction | 2021 |
| Arthur Smith (Grimsby) Limited | Transport & logistics | 1995 |
| Arysab Ltd | Transport & logistics | 2020 |
| Ascit Consulting Ltd | Professional & scientific | 2025 |
| Ashbridge Interiors Ltd | Construction | 2024 |
| Astral Electrical and Security Ltd | Construction | 2025 |
| Atkinson Investment Properties Limited | Real estate | 2020 |
| Atko Computer Consultants Ltd | Information & communication | 1998 |
| Atlas Industries Group Ltd | Manufacturing | 2026 |
| ATS Hygiene Innovations Ltd | Wholesale & retail | 2010 |
| Attain Fishing Limited | Agriculture & fishing | 2013 |
| Aura Hair Hull Limited | Other services | 2025 |
| Auto Magic (Hull) Limited | Wholesale & retail | 2016 |
| AVC GAS Ltd | Construction | 2021 |
| AWH Properties (Hull) Limited | Real estate | 2020 |
| AWH Waste Management Limited | Professional & scientific | 2023 |
| AWP Construction & Surfacing Ltd | Construction | 2009 |
| Azores Limited | Other services | 2025 |
| B & W Property Holdings Limited | Real estate | 2017 |
| B Clark & SON Limited | Construction | 2018 |
| Bacb Renewables Limited | Construction | 2019 |
| Bact Fabrications Limited | Manufacturing | 2023 |
| Barleymow Developments Limited | Construction | 2025 |
| Bay Shipping Limited | Professional & scientific | 1992 |
| Beal 1234 Limited | Construction | 2018 |
| Beal Capricorn Limited | Construction | 2000 |
| Beal Developments Limited | Construction | 1968 |
| Beal Holdings Limited | Professional & scientific | 2000 |
| Beal Homes Limited | Construction | 2017 |
| Beal Land Limited | Real estate | 2020 |