| Britshine Cleaning Ltd | Administrative & support | 2025 |
| Brittains Beverages Ltd | Manufacturing | 2018 |
| Brittenden Diagnostics Ltd | Health & social care | 2019 |
| Brizza Limited | Professional & scientific | 2002 |
| Broadacre Financial Management Ltd | Financial services | 2013 |
| Broadbent Property Management (York) Ltd | Real estate | 2023 |
| Broader Solutions Ltd | Professional & scientific | 2025 |
| Broadlands Consulting Ltd | Professional & scientific | 2021 |
| Broadmanor Consulting Limited | Professional & scientific | 2020 |
| Broadmanor Limited | Construction | 1973 |
| Broadswordintl Ltd | Administrative & support | 2024 |
| Broadvale Developments Limited | Construction | 1996 |
| Broadway (Rainham) Residents Management Company Limited | Households | 2020 |
| Broadway 50/50 Limited | Other services | 2010 |
| Broadway Flats (York) Management Company Limited | Hospitality | 2008 |
| Broadway Flats Management Company Limited | Households | 2001 |
| Brock & Briar Ltd | Wholesale & retail | 2024 |
| Brockceramics Ltd | Wholesale & retail | 2024 |
| Brocket Management Company Limited | Households | 2008 |
| Brockhill East (Redditch) Management Company Limited | Households | 2025 |
| Brocklehurst Properties Ltd | Real estate | 2019 |
| Brodericks (York) Ltd | Professional & scientific | 2014 |
| Broken Chair Ltd | Wholesale & retail | 2024 |
| Bromets Solicitors Limited | Professional & scientific | 2015 |
| Bromwich Bakehouse Ltd | Hospitality | 2023 |
| Bromwich Family Butchers Ltd | Wholesale & retail | 2022 |
| Bromwich Holdings Ltd | Financial services | 2026 |
| Bromworth Darley Limited | Professional & scientific | 2014 |
| Bromyard Vets Limited | Extraterritorial | 2016 |
| Bronte House Group Limited | Health & social care | 2024 |
| Bronte Properties Limited | Real estate | 1962 |
| Bronze Doors & Windows Limited | Manufacturing | 2018 |
| Brook Estates Ltd | Construction | 2011 |
| Brook Fmcg Consulting Ltd | Professional & scientific | 2015 |
| Brookdale Holdings Yorkshire Limited | Construction | 2024 |
| Brooke Williams Solicitors Limited | Professional & scientific | 2003 |
| Brookenby Limited | Real estate | 2025 |
| Brookenby Park Limited | Real estate | 2019 |
| Brooklands Energy Group Ltd | Professional & scientific | 2026 |
| Brookley Property Limited | Real estate | 2018 |
| Brooklyn Country Parks Limited | Hospitality | 2020 |
| Brooklyn Holiday Parks Ltd | Hospitality | 2023 |
| Brookside House Holidays Limited | Real estate | 2025 |
| Brookson (5012I) Limited | Professional & scientific | 2007 |
| Brookson (5212) Limited | Administrative & support | 2007 |
| Brookson (5645M) Limited | Professional & scientific | 2007 |
| Broom Associates Limited | Professional & scientific | 2014 |
| Broomco (2377) Limited | Professional & scientific | 2000 |
| Broomco (3385) Limited | Extraterritorial | 2003 |
| Broomhill View (Togston) Residents Management Company Limited | Real estate | 2023 |
| Broomsdale Ltd | Real estate | 2022 |
| Brothers Forever Ltd | Real estate | 2020 |
| Broughton VET Group Ltd | Professional & scientific | 2014 |
| Browfection by Emily Limited | Other services | 2025 |
| Brown & Blond Ltd. | Manufacturing | 2005 |
| Brown & Brown Fine Art Specialists Limited | Information & communication | 2024 |
| Brown & Company Architects Ltd | Professional & scientific | 2023 |
| Brown North East Lettings Ltd | Real estate | 2011 |
| Brown Pear Interiors Limited | Manufacturing | 2022 |
| Brown's Motor Care Ltd | Wholesale & retail | 2022 |
| Browncommerce Property Management Limited | Households | 2023 |
| Bruce Fletcher (Leicester) Limited | Extraterritorial | 1960 |
| Bruce Patrick Limited | Other services | 2008 |
| Brume Cafe & Wine Bar Ltd | Hospitality | 2026 |
| Brunch & Boards Ltd | Hospitality | 2026 |
| Brunch Limited | Hospitality | 2011 |
| Brunches Ltd | Hospitality | 2025 |
| Brunel Developments Limited | Real estate | 2022 |
| Brunswick of York CIC | Wholesale & retail | 2011 |
| Brunswick Organic Nurseries Limited | Agriculture & fishing | 1991 |
| Bryn Street Dental Clinic Limited | Health & social care | 2007 |
| Brynmoor (Harpers Lane) Management Company Limited | Households | 2008 |
| BS3 Studios Ltd | Real estate | 2021 |
| Bsap Property Limited | Households | 2019 |
| BSB York Ltd | Hospitality | 2025 |
| BSC Design Limited | Professional & scientific | 2021 |
| BSC Filters Limited | Manufacturing | 1989 |
| BSI Dental Limited | Health & social care | 2022 |
| Bsic Limited | Education | 2023 |
| Bsjc Ltd | Transport & logistics | 2024 |
| BSP Building Contractors Ltd | Construction | 2010 |
| Bspace Laboratories Ltd | Information & communication | 2024 |
| Bss-Va Ltd | Administrative & support | 2023 |
| BT Estates Ltd | Real estate | 2018 |
| BT7 Media Limited | Information & communication | 2026 |
| BTL Solutions Limited | Real estate | 2016 |
| BTS Property Developers Ltd | Construction | 2025 |
| BU4U Counselling Ltd | Health & social care | 2026 |
| BUA YAI Thai Ltd | Wholesale & retail | 2018 |
| Bubaadri Limited | Professional & scientific | 2022 |
| Bubble BAO Ltd | Hospitality | 2020 |
| Bubbles Inc Limited | Other services | 2016 |
| Buccaneer Properties LLP | | 2004 |
| Buchanan Mitchell Ltd | Real estate | 2012 |
| Buchanan Mitchell Stephenson Ltd | Professional & scientific | 2021 |
| Bucharest Bidco Limited | Financial services | 2018 |
| Bucharest Holdco Limited | Financial services | 2018 |
| Bucharest Midco Limited | Financial services | 2018 |
| Bucharest Topco Limited | Financial services | 2018 |
| Buck & Trail Outfitters Ltd | Wholesale & retail | 2026 |