| Bibble Property Limited | Real estate | 2022 |
| Bibendum PLB (Topco) Limited | Administrative & support | 2016 |
| Bibi Food Bristol Ltd | Hospitality | 2026 |
| Bibi Shoes Limited | Wholesale & retail | 2025 |
| Bibisnuggi Ltd | Wholesale & retail | 2026 |
| Bibisnuggy Ltd | Manufacturing | 2019 |
| Biblios Adventure Ltd | Education | 2018 |
| Biblos Ltd | Hospitality | 2011 |
| Bibstone Blacksmiths Limited | Manufacturing | 2014 |
| Bibury Limited | Real estate | 2024 |
| Bicep Press Ltd | Manufacturing | 2020 |
| Bicknell Construction Limited | Wholesale & retail | 1955 |
| Bicknell Holdings Limited | Construction | 1971 |
| BID Clifton Village Limited | Other services | 2012 |
| BID Craft Ltd | Professional & scientific | 2017 |
| BID Professionals Ltd | Professional & scientific | 2021 |
| Bidex Limited | Professional & scientific | 2025 |
| Bidford on Avon Tyres Ltd | Extraterritorial | 2022 |
| Bidford Taxis Ltd | Other services | 2017 |
| Bidgat Properties Ltd | Real estate | 2025 |
| Bidtrix Ltd | Extraterritorial | 2026 |
| Bidwell Metals Limited | Real estate | 1963 |
| BIE Autors Limited | Wholesale & retail | 2021 |
| BIE Consultancy Limited | Information & communication | 2020 |
| Bifa Holdings (UK) Ltd | Financial services | 2026 |
| Bifield Close Freeholders Ltd | Households | 2023 |
| Bifrost Bathrooms and Boilers Ltd | Construction | 2026 |
| Big 2 Fuels Limited | Wholesale & retail | 1998 |
| Big BAD Films Ltd | Information & communication | 2021 |
| Big BAD Music LLP | | 2026 |
| Big BEN Property Management Limited | Real estate | 2022 |
| Big Ben's Van Ltd | Transport & logistics | 2025 |
| Big Bite Bristol 1 Ltd | Hospitality | 2025 |
| Big Bite Food Ltd | Professional & scientific | 2018 |
| Big BLU Books Ltd | Information & communication | 2006 |
| Big Blue Communications Limited | Professional & scientific | 2017 |
| Big Bobble Films Limited | Information & communication | 2010 |
| Big Brand Theory Ltd | Professional & scientific | 2025 |
| Big BRO Services Ltd | Administrative & support | 2024 |
| Big Brow Films Ltd | Information & communication | 2025 |
| Big C Engineering Ltd | Construction | 2014 |
| Big Cats Marketing Limited | Professional & scientific | 2025 |
| Big Dave Property Maintenance and Facilities Management Limited | Other services | 2025 |
| Big Discount Bargain Store Bristol Ltd | Wholesale & retail | 2026 |
| Big Driver PW Limited | Transport & logistics | 2021 |
| Big Dude's Big Deals Ltd | Extraterritorial | 2025 |
| Big Hair Styles Limited | Other services | 2012 |
| Big Healthy Limited | Wholesale & retail | 2014 |
| Big Ideas Productions Ltd | Wholesale & retail | 2014 |
| Big Juice Ltd | Hospitality | 2012 |
| Big Kitchen (Bristol) Limited | Wholesale & retail | 2018 |
| Big Legs Studios Ltd | Real estate | 2026 |
| Big Likkle Bars Ltd | Wholesale & retail | 2024 |
| Big Mood Food Ltd | Hospitality | 2025 |
| Big Mouth Media Limited | Information & communication | 2024 |
| Big Nath's BBQ Shop Ltd | Wholesale & retail | 2025 |
| Big Naths’ BBQ Ltd | Hospitality | 2020 |
| Big O Ltd | Real estate | 2015 |
| Big Pale Nasty Coaching Ltd | Arts & recreation | 2024 |
| Big PI Limited | Real estate | 2023 |
| Big Property Limited | Real estate | 2019 |
| Big Red Square Ltd | Information & communication | 1999 |
| Big Sister Records Limited | Professional & scientific | 2025 |
| Big Sky Films Limited | Information & communication | 2019 |
| Big T Music Ltd | Wholesale & retail | 2016 |
| Big Team CIC | Administrative & support | 2019 |
| Big TIM Holdings Limited | Financial services | 2017 |
| Big Tonic Ltd | Manufacturing | 2025 |
| Big Tree CBD Ltd. | Wholesale & retail | 2023 |
| Big Tree Consultancy Limited | Professional & scientific | 2014 |
| Big Tree FD Limited | Professional & scientific | 2014 |
| Big Uproar CIC | Arts & recreation | 2025 |
| Big Wave Consulting Limited | Professional & scientific | 2017 |
| Big Youth Lifting Ltd | Other services | 2022 |
| Bigbellytelly Ltd | Information & communication | 2022 |
| Bigg Limited | Professional & scientific | 2007 |
| Biggie Best Limited | Wholesale & retail | 2002 |
| Bigly Ltd | Extraterritorial | 2024 |
| Bigolesecuritycompany Ltd | Information & communication | 2025 |
| Bigsiz Limited | Transport & logistics | 2024 |
| Bigt's Properties Ltd | Real estate | 2020 |
| Bigupcoffee Ltd | Information & communication | 2025 |
| Bijou Day Nursery & Creche (Baglan) Limited | Health & social care | 2023 |
| Bikar Aerospace Metals Ltd | Wholesale & retail | 2020 |
| Bike Events Limited | Administrative & support | 1995 |
| Bike Services UK Ltd | Transport & logistics | 2023 |
| Bike Station UK Limited | Wholesale & retail | 2004 |
| Bikeforyou Ltd | Wholesale & retail | 2020 |
| Biker's Toolbox Limited | Wholesale & retail | 2012 |
| Bikkle Island Ltd | Hospitality | 2017 |
| Bilates Ltd | Arts & recreation | 2024 |
| Bilayer Solutions Ltd | Extraterritorial | 2026 |
| Bilberry (Bristol) Ltd | Financial services | 2021 |
| Bilhan Enterprises Limited | Real estate | 2016 |
| Biliki Limited | Hospitality | 2023 |
| Bilingual Club Ltd | Education | 2025 |
| Biljania Ltd | Wholesale & retail | 2026 |
| Bill Davies & Co Ltd | Professional & scientific | 2019 |
| Bill LEE Professional Training Solutions Limited | Education | 2004 |
| Billdco Limited | Construction | 2023 |