| Bishop Road Afterschool Club | Education | 2004 |
| Bishop Systems Limited | Administrative & support | 1993 |
| Bishop's Knoll Management Company Limited | Households | 1985 |
| Bishop's Rest Management Company Limited | Households | 2015 |
| Bishop's Stortford North Consortium Limited | Construction | 2011 |
| Bishopbriggs Crematorium Limited | Professional & scientific | 2021 |
| Bishops House Consulting Limited | Information & communication | 2023 |
| Bishops Knoll Freehold Ltd | Households | 2018 |
| Bishopsmead Management Company Limited | Households | 1983 |
| Bishopston Bakery Company Limited | Wholesale & retail | 2004 |
| Bishopston Beanstalks Ltd | Education | 2013 |
| Bishopston Construction Contracts Limited | Administrative & support | 2013 |
| Bishopston Custom Paints Ltd | Wholesale & retail | 2016 |
| Bishopston Electrical Services Ltd | Construction | 2017 |
| Bishopston Homes Ltd. | Construction | 2017 |
| Bishopston Local Store Ltd | Wholesale & retail | 2023 |
| Bishopston Property Development Limited | Construction | 2016 |
| Bishopsworth Manorial Estates Limited | Real estate | 2000 |
| Bishopsworth Motor Services Limited | Wholesale & retail | 2013 |
| Bishton Holdings Limited | Construction | 1954 |
| Bisley House Bar and Grill Ltd | Hospitality | 2025 |
| Bisley House Bar and Restaurant Ltd | Financial services | 2025 |
| Bismillah Care Ltd | Health & social care | 2023 |
| Bispo.Tv Ltd | Information & communication | 2017 |
| Bisson International Holdings Limited | Financial services | 2021 |
| Bitbloom Ltd | Information & communication | 2019 |
| Bitcoin News Ltd | Extraterritorial | 2024 |
| Bite Haven Ltd | Hospitality | 2024 |
| Bite Your Tongue Productions Ltd | Information & communication | 2021 |
| Biteki Marketing Ltd | Professional & scientific | 2020 |
| Bitesize Bakes Limited | Manufacturing | 2025 |
| Bitflip Solutions Limited | Information & communication | 2022 |
| Bithika Medical Limited | Health & social care | 2013 |
| Bitica-Md Consulting Ltd | Professional & scientific | 2026 |
| Bits & Bezels Ltd | Other services | 2025 |
| Bitsolver Limited | Information & communication | 2012 |
| Bitton Automated Access Limited | Construction | 2017 |
| Bitton Motor Company Limited | Wholesale & retail | 2018 |
| BIZ Boosters Limited | Information & communication | 2023 |
| Bizalondon Ltd | Wholesale & retail | 2025 |
| Bizbuy Limited | Administrative & support | 2004 |
| Bizi Payments Ltd | Information & communication | 2023 |
| Bizley Barns Management Company Limited | Real estate | 2019 |
| Biznify Prime Solutions Limited | Public administration | 2024 |
| Bizpanion Consulting Ltd | Administrative & support | 2019 |
| Biztr Ltd | Wholesale & retail | 2025 |
| Bizzle Limited | Arts & recreation | 2013 |
| Bizztrex Ltd | Wholesale & retail | 2021 |
| Bizzy BEE IT Ltd | Information & communication | 2025 |
| Bizzy Kidz Club Ltd | Health & social care | 2025 |
| Bizzybumbobee Ltd | Households | 2024 |
| BJ & Sons Properties Ltd | Real estate | 2023 |
| BJ Investment Property Limited | Real estate | 2021 |
| BJB Travel Ltd | Administrative & support | 2017 |
| Bjgretail Ltd | Wholesale & retail | 2025 |
| BJJ Republic Ltd | Manufacturing | 2025 |
| BJL Hospitality Limited | Hospitality | 2023 |
| Bjmc Ltd | Health & social care | 2025 |
| BJR Logistics Limited | Transport & logistics | 2016 |
| BK Asset and Property Investments Ltd | Real estate | 2024 |
| BK Bristol Properties Ltd | Construction | 2026 |
| BK Interiors Limited | Professional & scientific | 2024 |
| BK Prestige Ltd | Wholesale & retail | 2025 |
| BK Scaffolding Ltd | Construction | 2020 |
| BK Swansea Wingmasters Ltd | Hospitality | 2026 |
| BKB Services Group Ltd | Construction | 2017 |
| BKD Interiors Ltd | Wholesale & retail | 2023 |
| BKG Talent Solutions Ltd | Administrative & support | 2022 |
| BKL Consulting Ltd | Professional & scientific | 2026 |
| BKS Stockwood Ltd | Hospitality | 2025 |
| BKT Properties Limited | Real estate | 2017 |
| BL Autosource (Sales) Ltd | Wholesale & retail | 2005 |
| BL Autosource LLP | | 2002 |
| BL Bristol Services Ltd | Transport & logistics | 2019 |
| BL Computer Services Limited | Wholesale & retail | 1992 |
| BL Property Holdings Limited | Real estate | 2023 |
| BL3 Consulting Ltd | Information & communication | 2024 |
| Black & Gold Tech Support Ltd | Wholesale & retail | 2018 |
| Black & White Bookkeepers Limited | Professional & scientific | 2009 |
| Black & White Theatre Ltd | Arts & recreation | 2025 |
| Black Acre Artist Management Ltd | Arts & recreation | 2017 |
| Black Acre Records Ltd | Information & communication | 2017 |
| Black and Blue Business Limited | Administrative & support | 2022 |
| Black and White FD Ltd | Professional & scientific | 2024 |
| Black and White Hospitality Europe Limited | Hospitality | 2021 |
| Black and White Hospitality Limited | Hospitality | 2013 |
| Black and White Hospitality Management Limited | Hospitality | 2013 |
| Black and White Hotel Management Limited | Hospitality | 2025 |
| Black Apron Group Ltd | Hospitality | 2026 |
| Black CAB Building Group Ltd | Construction | 2022 |
| Black Cat Cleaners Limited | Administrative & support | 2002 |
| Black Cat Films Limited | Information & communication | 2009 |
| Black Cat Thinking Limited | Professional & scientific | 2008 |
| Black City Records Ltd | Wholesale & retail | 2020 |
| Black Claw Investments Limited | Real estate | 2026 |
| Black Country PPP Health Services Limited | Construction | 1998 |
| Black Crest Consulting Limited | Professional & scientific | 2017 |
| Black Diamond Engineering Ltd | Professional & scientific | 2012 |
| Black Diamond Tattoos Bristol Ltd | Health & social care | 2022 |
| Black Dog Development (Bristol) Ltd | Professional & scientific | 2015 |