| Beal Securities Limited | Professional & scientific | 2010 |
| Beautique Beauty and Aesthetics Ltd | Other services | 2024 |
| Beauty Haus by Chloe Ltd | Extraterritorial | 2024 |
| BED Outlet Limited | Wholesale & retail | 2026 |
| BED Saver (Shipley) Limited | Wholesale & retail | 2014 |
| Bell & Co Estates Limited | Real estate | 2019 |
| Bell & Co Professional Recruitment Limited | Administrative & support | 2020 |
| Bell & Higgins (Hull) Limited | Wholesale & retail | 2005 |
| BELL4BUSINESS Limited | Administrative & support | 2017 |
| Belle Beauty Hessle Limited | Other services | 2020 |
| Bemora Skincare Limited | Wholesale & retail | 2019 |
| Bennett Decorating Services Limited | Wholesale & retail | 2003 |
| Benson Park Limited | Extraterritorial | 2002 |
| Bethnal Green LLP | | 2010 |
| Better Together - Humber Limited | Health & social care | 2022 |
| Beverley Groundworks Limited | Construction | 2023 |
| Beverley House Dispensary Limited | Wholesale & retail | 2022 |
| Bianca’S Place Ltd | Wholesale & retail | 2025 |
| Big Deal Games (UK) Ltd | Administrative & support | 2007 |
| Bingo Express Limited | Information & communication | 2011 |
| Bishop Court Property Management Limited | Administrative & support | 2011 |
| Bismor Care Homes Ltd | Health & social care | 2015 |
| Bits & Bobs (Hull) Limited | Wholesale & retail | 2003 |
| Bladeteam Limited | Manufacturing | 2023 |
| Blind Swine (Willerby) Limited | Hospitality | 2025 |
| Blink Agency Limited | Information & communication | 2008 |
| BLM Media Ltd | Professional & scientific | 2025 |
| Bloo Horizon Limited | Construction | 1962 |
| BLS Retail Limited | Wholesale & retail | 2024 |
| Bluesky the Weir Ltd | Hospitality | 2023 |
| Bofgo Properties Ltd | Real estate | 2024 |
| Boluda Towage SMS (Bristol Channel) Limited | Transport & logistics | 2011 |
| Boluda Towage SMS Limited | Transport & logistics | 2002 |
| Bombiix Ltd | Manufacturing | 2017 |
| Bombyx Ltd | Information & communication | 2024 |
| Bonties Limited | Wholesale & retail | 2014 |
| Boomerang Digital Holdings Limited | Financial services | 2021 |
| Boomerang Digital Limited | Information & communication | 1994 |
| Boothferry Barber Limited | Other services | 2019 |
| Boothferry Property Ltd | Real estate | 2025 |
| Borneri Ltd | Wholesale & retail | 2023 |
| Boss Trattoria Limited | Hospitality | 2018 |
| Bossmans Fast Food Limited | Hospitality | 2024 |
| Boston Energy Limited | Professional & scientific | 2011 |
| Bovill & SON Ltd | Construction | 2021 |
| Bowerham Road Developments Limited | Construction | 2025 |
| Boyd Line Limited | Agriculture & fishing | 1980 |
| Braddison Trading Ltd | Administrative & support | 2014 |
| Bradheath Limited | Construction | 2014 |
| Brand Syndicate Ltd | Professional & scientific | 2021 |
| BRG Developments Limited | Professional & scientific | 2011 |
| Bridge Markets Limited | Information & communication | 2023 |
| Bright Happiness Ltd | Hospitality | 2012 |
| Brightbridge Executive Search Ltd | Administrative & support | 2018 |
| British Acquisitions Ltd | Real estate | 2024 |
| Brompton Properties Europe Ltd | Real estate | 2014 |
| Brooklands Business Estates Limited | Real estate | 1995 |
| Brooklands Grovehill Ltd | Real estate | 2021 |
| Brooklands Leasing Ltd. | Professional & scientific | 1981 |
| Brooklands Property Holdings Limited | Real estate | 1957 |
| Brooklands the Agency Ltd | Real estate | 2021 |
| BT Travel Limited | Administrative & support | 2026 |
| Building Maintenance and Construction Ltd | Construction | 2022 |
| Bulk Logistic Solutions (Food) Limited | Transport & logistics | 2007 |
| Bureau Technical Inspection Services Limited | Administrative & support | 1979 |
| Bureau Technical Recruitment Limited | Extraterritorial | 2011 |
| Bureau Technical Services Holdings Limited | Financial services | 2024 |
| Bureau Technical Services Limited | Professional & scientific | 2010 |
| Burst Creatives Ltd | Professional & scientific | 2017 |
| Burton Facial & Dental Aesthetics Ltd | Health & social care | 2026 |
| Business Bites Ltd | Hospitality | 2025 |
| Butterflies Childrens Nursery Limited | Health & social care | 2000 |
| Buzz (Hessle) Limited | Professional & scientific | 2010 |
| Bwpb Ltd | Hospitality | 2023 |
| C & K Controls (Hull) Ltd | Professional & scientific | 2017 |
| C P Plumbing & Heating Limited | Construction | 2002 |
| C X C Plumbing and Heating Limited | Construction | 2025 |
| C&C Business Solutions Limited | Information & communication | 2024 |
| C.R. Reynolds Limited | Construction | 1983 |
| Cadron Engineering Ltd | Professional & scientific | 2025 |
| Calcutt Properties Limited | Real estate | 2025 |
| Caley International Limited | Extraterritorial | 1983 |
| Callum James Group Ltd | Wholesale & retail | 2017 |
| Calpe UK Ltd | Real estate | 2025 |
| Candy Fashion Limited | Wholesale & retail | 2018 |
| Capital & Provincial Developments Limited | Construction | 2007 |
| Car Phone Installations Limited | Manufacturing | 2000 |
| Carbon Visibility Ltd | Professional & scientific | 2020 |
| Card Dojo Ltd | Wholesale & retail | 2025 |
| Cardiac 126 Ltd | Health & social care | 2023 |
| Cardiac Dpow Limited | Health & social care | 2016 |
| Care Precious Ltd | Other services | 2009 |
| Care Quality Management Hull Limited | Health & social care | 2015 |
| Carlam Hill Ltd | Real estate | 2015 |
| Carter Business Systems Limited | Manufacturing | 1998 |
| Carter Construction (Roofing and Cladding) Limited | Construction | 2011 |
| Carter Rainscreen Cladding Ltd | Construction | 2019 |
| Cast Iron Security Ltd | Financial services | 2020 |
| Castlewood Fishing Limited | Agriculture & fishing | 2013 |
| Caythorpe GAS Storage Limited | Energy | 2004 |