| Bridgehead South Management Limited | Real estate | 2018 |
| Bridgeland Developments Limited | Construction | 2000 |
| Bridgeman Enterprises Limited | Wholesale & retail | 2006 |
| Bridges Hull Ltd | Health & social care | 2008 |
| Bridges Property Solutions Ltd | Households | 2024 |
| Bridgestock Developments Limited | Real estate | 2016 |
| Bridgeview HR Solutions Limited | Administrative & support | 2025 |
| Bridgeways (Alford) Management Company Limited | Real estate | 2018 |
| Bridlington Bay Boat Launch 2025 Ltd | Transport & logistics | 2003 |
| Bridlington Flats Management Ltd | Households | 2020 |
| Briethorn Limited | Hospitality | 2007 |
| Briggs & Mortar Building Services Limited | Construction | 2010 |
| Briggs Draper Property Investments Ltd | Real estate | 2024 |
| Brigham's Limited | Manufacturing | 2002 |
| Bright Beginnings (Hull) Limited | Education | 2018 |
| Bright Edge Networks Limited | Information & communication | 2025 |
| Bright Eyes (Optical) Limited | Wholesale & retail | 2003 |
| Bright Green UK Ltd | Wholesale & retail | 2009 |
| Bright House Investors Ltd | Real estate | 2020 |
| Bright Site Solutions Ltd | Administrative & support | 2025 |
| Brightam Property Solutions Ltd | Real estate | 2024 |
| Brighter Tomorrow Limited | Health & social care | 2022 |
| Brill & Noru Limited | Construction | 2025 |
| Brilliant Buying Limited | Professional & scientific | 2014 |
| Brit Merchants Ltd | Transport & logistics | 2026 |
| Britannia Monitoring Services Limited | Administrative & support | 2017 |
| Britasiadoctors Limited | Administrative & support | 2018 |
| Britdec Ltd | Construction | 2016 |
| Brittkinson Property Ltd | Real estate | 2026 |
| Brjoinery Services Ltd | Construction | 2023 |
| BRM Marketing Limited | Wholesale & retail | 2010 |
| Broad Haulage Services Limited | Transport & logistics | 2017 |
| Broadley Corporate Livery Ltd | Manufacturing | 2023 |
| Broadman Limited | Energy | 1990 |
| Broadway House 2020 Ltd | Real estate | 2020 |
| Broadway Ventures Limited | Hospitality | 2010 |
| Brobinsongroup Ltd | Wholesale & retail | 2022 |
| Brocklehurst Chemists Limited | Wholesale & retail | 1994 |
| Brockspace Ltd | Households | 2020 |
| Brody Bassett Metals Limited | Water & waste | 2024 |
| Brolin Company Limited | Wholesale & retail | 2023 |
| Bromley Education Enterprises (BEE) Limited | Professional & scientific | 2017 |
| Brook Street Local Limited | Wholesale & retail | 2025 |
| Brook Systems Limited | Other services | 2023 |
| Brooke Ceramics Limited | Wholesale & retail | 1987 |
| Brookes Group (Hull) Limited | Construction | 2008 |
| Brookfield LR Parts Ltd | Wholesale & retail | 2008 |
| Brooklands Road 1960 Limited | Extraterritorial | 2014 |
| Brooks Law EOT Limited | Financial services | 2021 |
| Brooks Law Ltd | Professional & scientific | 2011 |
| Brooks of Hull Limited | Wholesale & retail | 1961 |
| Brooks Ronnie Construction Limited | Construction | 2022 |
| Brookside Management (Hull) Limited | Real estate | 1984 |
| Broomco (3554) Limited | Professional & scientific | 2004 |
| Broomco (3555) Limited | Professional & scientific | 2004 |
| Brotherhood Barbers (Hull) Limited | Other services | 2024 |
| Brough MOT Centre Limited | Wholesale & retail | 2013 |
| Broughton & SON Ltd | Real estate | 2024 |
| Broughtons Fishing Limited | Agriculture & fishing | 2025 |
| Browar -Polski PUB Ltd | Hospitality | 2025 |
| Brown Atkinson Cargo Services Ltd. | Administrative & support | 1992 |
| Brown Bros Ventures Ltd | Hospitality | 2025 |
| Brownings Holdings Limited | Manufacturing | 2006 |
| Brownings Limited | Manufacturing | 1993 |
| Browns Blinds, Shutters and Curtains Ltd | Construction | 2025 |
| Brownzircon Digital Ltd | Information & communication | 2026 |
| Browse Studios C.I.C. | Information & communication | 2023 |
| BRS Plumbing & Heating (Hull) Ltd | Construction | 2025 |
| Brulik Trans Ltd | Transport & logistics | 2018 |
| Brumhead Holdings Limited | Households | 2011 |
| Brummitt Animal Health Ltd | Professional & scientific | 2025 |
| Brunel Newco Limited | Financial services | 2025 |
| Bryan Humphreys Limited | Professional & scientific | 2021 |
| Bryce Europe Limited | Extraterritorial | 2015 |
| Bryce Mennell Limited | Professional & scientific | 2003 |
| BSC Energy Ltd | Construction | 2020 |
| Bsjconstruction Ltd | Construction | 2015 |
| BSN Agri Services Ltd | Agriculture & fishing | 2019 |
| BSN Industrial Contractors Ltd | Construction | 2026 |
| BSN Medical Limited | Professional & scientific | 2000 |
| BSN Paint Contractors Limited | Construction | 2025 |
| BSR Property Management Ltd | Real estate | 2018 |
| Bubble 1 Hand Car Wash Ltd | Administrative & support | 2025 |
| Bubble House Hull Ltd | Hospitality | 2026 |
| Bubbleshop Scarborough Ltd | Manufacturing | 2024 |
| Bucharest B Ltd | Wholesale & retail | 2026 |
| Bucharest Convenience Ltd | Wholesale & retail | 2024 |
| Buckingham Optical Services Ltd | Wholesale & retail | 2019 |
| Buckle Group Limited | Financial services | 2020 |
| Bucks Garage Services Ltd | Manufacturing | 2017 |
| Bucuresti Hull Ltd | Wholesale & retail | 2024 |
| Budd and Todd Ltd | Wholesale & retail | 2021 |
| Buddies Family Show Bar Ltd | Hospitality | 2020 |
| Budget Tyres (Hull) Ltd | Wholesale & retail | 2016 |
| Budofix Ltd | Manufacturing | 2017 |
| Buffet City (Hull) Limited | Hospitality | 2011 |
| Buila | Education | 2026 |
| Builders' Merchant Company Ltd | Wholesale & retail | 2004 |
| Buildfast Hull Limited | Construction | 2020 |
| Building Control Partnership Ltd | Construction | 2006 |