| Alderman Grange Ltd | Professional & scientific | 2011 |
| Alderwood Fitted Furniture Limited | Manufacturing | 2004 |
| Aldgate Wealth Management Limited | Financial services | 2025 |
| Aldgate Wealth Planning Ltd | Financial services | 2022 |
| ALE 5 Stars Ltd | Administrative & support | 2024 |
| Aleaden Ltd | Transport & logistics | 2026 |
| Aleré Group Ltd | Wholesale & retail | 2026 |
| Alex Carr Holdings Ltd | Financial services | 2010 |
| Alex Cook Ltd | Other services | 2014 |
| Alex Davis PCS Ltd | Wholesale & retail | 2023 |
| Alex Tech Solutions Ltd | Professional & scientific | 2018 |
| Alexander Construction (Yorkshire) Limited | Wholesale & retail | 2020 |
| Alexander Luxury (Yorkshire) Limited | Construction | 2022 |
| Alexander MAY Properties Limited | Real estate | 2023 |
| Alexander Properties (Yorkshire) Limited | Real estate | 2019 |
| Alexandra Court Management Services (Hull) Limited | Households | 1981 |
| Alexandra House 2025 Limited | Professional & scientific | 2025 |
| Alexandra James Salon Limited | Other services | 2023 |
| Alexandra Marrs Interior Design Ltd | Professional & scientific | 2023 |
| Alexandra Stanley Property Limited | Real estate | 2019 |
| ALF Management Limited | Professional & scientific | 2026 |
| Alfaihan Used Car Ltd | Wholesale & retail | 2024 |
| Alfie Media Ltd | Information & communication | 2024 |
| Alfies Super Whippy Ltd | Hospitality | 2026 |
| Alfred Freehold Group Ltd | Real estate | 2026 |
| Alfred Property Group Ltd | Real estate | 2026 |
| Algam Limited | Health & social care | 2011 |
| Algorigence Ltd | Information & communication | 2026 |
| ALI House Takeaway Limited | Hospitality | 2025 |
| ALI Hull Limited | Other services | 2024 |
| Aliam Properties Limited | Real estate | 2015 |
| Alibaba Inernational Superstore Limited | Wholesale & retail | 2025 |
| Alice (Yorkshire) Limited | Real estate | 2003 |
| Aligie Limited | Health & social care | 2001 |
| Alipes Limited | Other services | 2011 |
| ALK Mechanical Ltd | Construction | 2025 |
| Alkareem Medical Ltd | Health & social care | 2023 |
| ALL About Damp Ltd | Construction | 2025 |
| ALL About Homes Hull Ltd | Real estate | 2019 |
| ALL About Joinery Ltd | Construction | 2018 |
| ALL Aspects Fire Protection Limited | Construction | 2009 |
| ALL Aspects of Accounts Ltd | Professional & scientific | 2020 |
| ALL Bright Electrical Hull Ltd | Construction | 2023 |
| ALL Developments Commercial Limited | Real estate | 2026 |
| ALL Developments Ltd | Real estate | 2020 |
| ALL Fibre Ltd | Professional & scientific | 2014 |
| ALL Flying Colours Ltd | Administrative & support | 2022 |
| ALL Iceland Limited | Administrative & support | 2003 |
| ALL Nation Security Ltd | Administrative & support | 2024 |
| ALL Patto Ltd | Hospitality | 2025 |
| ALL Right Autos Ltd | Wholesale & retail | 2015 |
| ALL Saints Mews (Preston) Limited | Real estate | 2013 |
| ALL Sorted Studio Ltd | Administrative & support | 2025 |
| ALL Stars OUT of School Club Ltd | Education | 2026 |
| ALL Trade Services 4U Ltd | Construction | 2020 |
| All-Inc Fitness Limited | Arts & recreation | 2017 |
| Allam Developments Limited | Construction | 1996 |
| Allam Generators Limited | Manufacturing | 2005 |
| Allam Marine Limited | Extraterritorial | 2025 |
| Allam Power Limited | Manufacturing | 1992 |
| Allamhouse Limited | Professional & scientific | 2009 |
| Allan Wood Inspection Limited | Professional & scientific | 2025 |
| Allclear Glass & Glazing Limited | Manufacturing | 2000 |
| Allderidge Homes Limited | Construction | 2024 |
| Allderidge Properties Limited | Financial services | 2008 |
| Allen Harrison Co Ltd | Wholesale & retail | 2021 |
| Allen Recovery Group Limited | Administrative & support | 2026 |
| Allen Smith (Haulage) Limited | Transport & logistics | 1975 |
| Allenby Commercial (Construction) Limited | Construction | 2011 |
| Allenby Engineering Limited | Professional & scientific | 2025 |
| Allenby Property Ltd | Hospitality | 2025 |
| Allensby Group Limited | Manufacturing | 2018 |
| Allfab Services Limited | Manufacturing | 2021 |
| Alliance Electrical Ltd | Construction | 2015 |
| Alliance General Property Developments Ltd | Construction | 2020 |
| Alliance Local Ltd | Wholesale & retail | 2026 |
| Alliance Steel Services Limited | Manufacturing | 2010 |
| Alliance Structures Limited | Manufacturing | 2015 |
| Allied Facilities Compliance Limited | Construction | 2021 |
| Allied Properties (Hull) Limited | Real estate | 1988 |
| Allied Properties Holdings Limited | Financial services | 2023 |
| Allison Rents Ltd | Real estate | 2023 |
| Allon Construction Limited | Construction | 2018 |
| Allon Homes Limited | Construction | 2011 |
| Allon Investments Limited | Real estate | 2013 |
| Alloy Wheel Refurbishment Hull Ltd | Wholesale & retail | 2019 |
| Allsorts Co. Ltd | Wholesale & retail | 2026 |
| Allspares (Hull) Limited | Water & waste | 2011 |
| Alltech Door Systems Limited | Manufacturing | 2017 |
| Alltechmotors Limited | Wholesale & retail | 2024 |
| Allure Aesthetics Hull Ltd | Other services | 2020 |
| Allwood Farm Ltd | Agriculture & fishing | 2020 |
| Alma Construction Consultancy Ltd | Construction | 2022 |
| Alma Delikatesy Limited | Wholesale & retail | 2019 |
| Alma MAY Enterprise Ltd | Financial services | 2025 |
| Alma YAP Limited | Health & social care | 2016 |
| Almerico Limited | Construction | 2006 |
| Alob Appliances Ltd | Manufacturing | 2025 |
| ALP Solutions Ltd | Professional & scientific | 2024 |
| Alpaida Ltd | Real estate | 2021 |