| Bluebell Farms Ltd | Agriculture & fishing | 2006 |
| Bluebell Lakes Limited | Agriculture & fishing | 2023 |
| Blueberry Project Management Ltd | Professional & scientific | 2015 |
| Bluebridge Healthcare Ltd | Health & social care | 2025 |
| Bluecane.Net Limited | Information & communication | 2001 |
| Bluedge Limited | Information & communication | 2021 |
| Bluegate AMB Ltd | Construction | 2026 |
| Bluegate Talent Ltd | Administrative & support | 2025 |
| Bluegrid Technology Ltd | Construction | 2025 |
| Bluehawk Property Ltd | Real estate | 2021 |
| Bluehive Technologies Limited | Information & communication | 2025 |
| Bluelight Services Limited | Real estate | 2021 |
| Blueprint Strategy Ltd | Professional & scientific | 2025 |
| Bluerock Construction & Maintenance Ltd | Construction | 2026 |
| Bluerock Properties Ltd | Real estate | 2026 |
| Bluesky Software Industries Ltd | Information & communication | 2023 |
| Bluestar Forecourt Limited | Wholesale & retail | 2024 |
| Bluestone Autos Ltd | Wholesale & retail | 2019 |
| Blush Property Ltd | Real estate | 2022 |
| Bluwater Valves Limited | Water & waste | 2024 |
| Blynai Properties Limited | Real estate | 2021 |
| BM Cambs Limited | Hospitality | 2026 |
| BM Catering Peterborough Ltd | Hospitality | 2024 |
| BM Construction 27 Ltd | Construction | 2023 |
| BM Grocery Ltd | Wholesale & retail | 2025 |
| BM Installations (Peterborough) Limited | Construction | 2011 |
| BM Production Services Ltd | Information & communication | 2024 |
| BM Property Lettings Ltd | Real estate | 2025 |
| BMA Builder Ltd | Construction | 2026 |
| Bmad Technology Limited | Information & communication | 2025 |
| Bmaw Property Maintenance Ltd | Construction | 2025 |
| BMC Health Ltd | Professional & scientific | 2024 |
| Bmhf | Other services | 2020 |
| BMO Brand Building Ltd | Professional & scientific | 2024 |
| BMP (Cambridge) Limited | Construction | 2003 |
| BMP (Peterborough) Limited | Construction | 2015 |
| BNG Partnership Ltd | Administrative & support | 2020 |
| BNK Accountancy Services Limited | Professional & scientific | 2013 |
| BNR Technical Services Limited | Professional & scientific | 2022 |
| Boardman Innovative Ltd | Wholesale & retail | 2019 |
| Boards of Ferrar Ltd | Hospitality | 2025 |
| Boatemaa Limited | Health & social care | 2024 |
| BOB Production England Ltd | Hospitality | 2026 |
| Boba on Wheels Ltd | Hospitality | 2025 |
| Bobbybean Limited | Information & communication | 2010 |
| Bobtrans Service Ltd | Transport & logistics | 2017 |
| Bobzar Network Ltd | Information & communication | 2025 |
| Bode Global Properties Limited | Real estate | 2026 |
| Bodhx Academy Limited | Education | 2026 |
| Bodsap Consulting Limited | Professional & scientific | 2022 |
| Body Aesthetica Ltd | Health & social care | 2019 |
| Body and Trim (Cambs) Limited | Wholesale & retail | 2014 |
| Bodyshop Bros Limited | Wholesale & retail | 2023 |
| Bodyworx Gym (Peterborough) Ltd | Arts & recreation | 2006 |
| Boekestyn Holdings Ltd | Financial services | 2019 |
| BOG & Andra Limited | Transport & logistics | 2019 |
| Bogatu Services Ltd | Transport & logistics | 2024 |
| Bogdan U.M. Limited | Professional & scientific | 2016 |
| Bogdavis Trans Limited | Wholesale & retail | 2015 |
| Bogdi Logistics Ltd | Administrative & support | 2020 |
| Boguzas Limited | Transport & logistics | 2023 |
| Boiler Monkey Ltd | Construction | 2018 |
| Boiler Moore Limited | Construction | 2017 |
| Bojar-Ski Limited | Construction | 2017 |
| Boks Holdings Limited | Financial services | 2016 |
| Bold & Wise Group Limited | Financial services | 2023 |
| Bold & Wise Properties Limited | Real estate | 2023 |
| Boleyn Support Services Limited | Professional & scientific | 2014 |
| Bollard Maritime UK Limited | Professional & scientific | 2024 |
| Bolton Instructor Services Limited | Education | 2023 |
| Bolton Thorp | Financial services | 2022 |
| Bolubab Medical Limited | Health & social care | 2019 |
| Bombonel Trans Ltd | Transport & logistics | 2025 |
| Bonawentura Ltd | Transport & logistics | 2025 |
| Bone Surgery Ltd | Professional & scientific | 2014 |
| Boneca Ltd | Administrative & support | 2022 |
| Boneca Properties Ltd | Real estate | 2024 |
| Bonnex Investments Limited | Extraterritorial | 2020 |
| Bonnex Ltd | Construction | 2015 |
| Bonnie Gems Ltd | Wholesale & retail | 2026 |
| Bonnie Yau's Food Products Limited | Manufacturing | 2012 |
| Bonum Properties Ltd | Real estate | 2021 |
| Bookbridge Tutoring Limited | Education | 2025 |
| Booked and Busy Marketing Services Ltd | Professional & scientific | 2025 |
| Bookkeeping, Accounting and Consultancy Services Limited | Professional & scientific | 2021 |
| Books N’ Bobs Ltd | Wholesale & retail | 2024 |
| Boon and Boon Consulting Limited | Administrative & support | 2019 |
| Boongate Hand Car Wash Ltd | Other services | 2017 |
| Boongate Holdings Limited | Financial services | 2023 |
| Boongate KIA Limited | Wholesale & retail | 2011 |
| Boongate Property Limited | Real estate | 2011 |
| Boons Transport Partners LLP | | 2022 |
| Booom! Limited | Professional & scientific | 2015 |
| Boranthaimassage Ltd | Health & social care | 2024 |
| Border Rock Holdings Limited | Financial services | 2021 |
| Bordon (ST Lucia Park) Residents Company Limited | Households | 2019 |
| Bordon Residents Company Limited | Households | 2002 |
| Borealis Nexus Group Limited | Professional & scientific | 2024 |
| Boring Outfit Ltd | Wholesale & retail | 2022 |
| Borough Cars Ltd | Transport & logistics | 2025 |