| Advanced Habitats Limited | Construction | 2019 |
| Advanced Investment Group Ltd | Real estate | 2025 |
| Advanced Leisure Services Limited | Wholesale & retail | 2016 |
| Advanced Plastics Group (EOT) Limited | Financial services | 2025 |
| Advanced Plastics Group Limited | Professional & scientific | 2007 |
| Advanced Plastics Limited | Manufacturing | 1992 |
| Advanced Resin Flooring Ltd | Construction | 2022 |
| Advanced Resin Systems Limited | Construction | 2019 |
| Advanced Rope Access Engineering Ltd | Administrative & support | 2018 |
| Advanced Skin Tech UK Ltd | Wholesale & retail | 2023 |
| Advanced Steel Detailing Limited | Manufacturing | 2015 |
| Advanced Vehicle Parts Ltd | Wholesale & retail | 2025 |
| Advantage Pumping Solutions Limited | Extraterritorial | 2014 |
| Adventure Products Ltd | Wholesale & retail | 2023 |
| Adventure Resources Limited | Administrative & support | 2009 |
| Advotalk Limited | Education | 2024 |
| Ady-Pepe Transport Ltd | Transport & logistics | 2025 |
| AE Electrical, Building Services & Maintenance Limited | Construction | 2025 |
| AE Jewelry Ltd | Manufacturing | 2025 |
| AE Media and Marketing Ltd | Professional & scientific | 2025 |
| AEB Architecture & Design Ltd | Professional & scientific | 2017 |
| AEB Estates Limited | Administrative & support | 2017 |
| AEC Electrics Ltd | Construction | 2024 |
| AEG Traders Ltd | Other services | 2022 |
| Aeivos Auto Service Ltd | Wholesale & retail | 2024 |
| Aelithia Ltd | Other services | 2024 |
| Aerial Erect Limited | Wholesale & retail | 2003 |
| Aero Engineers Ltd | Manufacturing | 2015 |
| Aero Group Limited | Other services | 2015 |
| Aeromed QMS Limited | Administrative & support | 2017 |
| Aerotruss Limited | Construction | 2010 |
| Aesthetics by Moll Ltd | Other services | 2025 |
| Aesthetics Clinic by Chloe Ltd | Health & social care | 2024 |
| Aeternia Group Limited | Wholesale & retail | 2025 |
| Aethm Medical Ltd | Health & social care | 2024 |
| Aezab Limited | Real estate | 2025 |
| AF Agri Ltd | Agriculture & fishing | 2020 |
| AF Steel Coatings Ltd | Manufacturing | 2021 |
| Affinity (Hull) Limited | Other services | 2015 |
| Affordable EVS UK Ltd | Wholesale & retail | 2026 |
| Affordable Justice Limited | Professional & scientific | 2015 |
| Affordable Luxury Homes Ltd | Real estate | 2024 |
| AFG Property Management and Rentals LLP | | 2024 |
| AFG Property Rentals and Management Limited | Real estate | 2025 |
| AFG4N3 Ltd | Wholesale & retail | 2026 |
| Afghan Cuisine Limited | Hospitality | 2024 |
| Afghan Restaurant(Hull) Limited | Hospitality | 2024 |
| AFL Site Solutions Ltd | Construction | 2021 |
| Aflow Ltd | Professional & scientific | 2014 |
| AFN EX CI Limited | Construction | 2022 |
| Afos Holdings Limited | Professional & scientific | 2017 |
| Afos Limited | Manufacturing | 2006 |
| Africa Hub Ltd | Wholesale & retail | 2024 |
| Africa Sema Ltd | Wholesale & retail | 2026 |
| Africa Studios Limited | Information & communication | 2006 |
| African Strategic Metals Limited | Professional & scientific | 2021 |
| Afridi Tastes Ltd | Hospitality | 2026 |
| Afrin 21 Ltd | Health & social care | 2019 |
| Afrina Foods Ltd | Hospitality | 2025 |
| Afrisnap Catering Limited | Manufacturing | 2017 |
| AFS (Hull) Ltd | Manufacturing | 2018 |
| AFS (Training) Limited | Professional & scientific | 2011 |
| After the Click Ltd | Professional & scientific | 2024 |
| AG Auto Expert Ltd | Wholesale & retail | 2024 |
| AG Climate Services Ltd | Construction | 2017 |
| AG Hvac & Refrigeration Services Limited | Professional & scientific | 2016 |
| AG UK Consultancy Limited | Professional & scientific | 2024 |
| Agape Care Services Ltd | Administrative & support | 2017 |
| Agar Construction Ltd | Construction | 2021 |
| AGC Trade Fair Ltd | Information & communication | 2025 |
| AGC Wind Ltd | Professional & scientific | 2026 |
| AGE UK Hull and East Yorkshire Limited | Health & social care | 2003 |
| AGE UK Hull Trading Limited | Extraterritorial | 1994 |
| Agenda Five Limited | Extraterritorial | 2023 |
| Agenda Resource Management Holdings Limited | Financial services | 2023 |
| Agenda Resource Management Limited | Professional & scientific | 1996 |
| Agent Compliance Ltd | Administrative & support | 2023 |
| Agercon Holdings Limited | Real estate | 2013 |
| Aghoco 2360 Limited | Wholesale & retail | 2025 |
| Aghoco 2361 Limited | Wholesale & retail | 2025 |
| Aghoco 2362 Limited | Wholesale & retail | 2025 |
| Aghoco 2363 Limited | Wholesale & retail | 2025 |
| Agilis Management Ltd. | Professional & scientific | 2013 |
| Agnew Renewables Ltd | Construction | 2026 |
| Agricultural Industries Limited | Administrative & support | 2005 |
| Agriculture Machinery Cleaning Ltd | Other services | 2014 |
| AGV 1 Ltd | Construction | 2023 |
| AH Logistics Limited | Transport & logistics | 2024 |
| AH Recovery Ltd | Transport & logistics | 2026 |
| AH Warehousing Limited | Transport & logistics | 2024 |
| Ahaan Limited | Wholesale & retail | 2018 |
| Ahalnila Trading Ltd | Wholesale & retail | 2023 |
| AHC Holdings Group Limited | Financial services | 2023 |
| AHD Fabrications Limited | Manufacturing | 2019 |
| Ahead of Hair Ltd | Other services | 2025 |
| Ahlmark Shipping (UK) Limited | Transport & logistics | 2001 |
| Ahmed & Co Accountants (Hull) Limited | Professional & scientific | 2026 |
| AHS Joinery & Building Limited | Construction | 2015 |
| Ahuicare Limited | Wholesale & retail | 2026 |
| AI Dock Ltd | Information & communication | 2026 |