| Bullitt Properties Limited | Real estate | 2022 |
| Bullivant Trustees UK Ltd | Financial services | 2024 |
| Bullock Investments Limited | Manufacturing | 2014 |
| Bullock Property Investments Limited | Real estate | 2021 |
| Bulls Consultancy Limited | Professional & scientific | 2024 |
| Bulls Estate Limited | Real estate | 2023 |
| Bulltech Belting Ltd | Manufacturing | 2022 |
| Bully's Ltd | Hospitality | 2011 |
| Bumperluxe Ltd | Wholesale & retail | 2024 |
| Bundlecorp Limited | Information & communication | 2020 |
| Bunspot Ltd | Hospitality | 2025 |
| Bunton-Williams Ltd | Hospitality | 2022 |
| Bunty Autos Ltd | Wholesale & retail | 2024 |
| Bunz Shakez Ltd | Hospitality | 2024 |
| Buraq Capital Ltd | Financial services | 2023 |
| Bure View Ltd | Real estate | 2024 |
| Burgar.Box Limited | Manufacturing | 2023 |
| Burgerhood Ltd | Hospitality | 2025 |
| Burgerific Derby Ltd | Hospitality | 2024 |
| Burghfield Park Management Company Limited | Households | 2018 |
| Burkes Building and Maintenance Ltd | Construction | 2026 |
| Burkes Trading Ltd | Wholesale & retail | 2026 |
| Burleigh Apartments (Derby) Management Company Limited | Households | 2025 |
| Burleigh Mews (Derby) Management Company Limited | Real estate | 2005 |
| Burley Grange Investments Limited | Professional & scientific | 2021 |
| Burley Property Ltd | Real estate | 2021 |
| Burlington Travel Limited | Administrative & support | 1980 |
| Burms Aviation Limited | Transport & logistics | 2019 |
| Burnaston Body Shop Limited | Wholesale & retail | 2023 |
| Burnaston Car Sales Ltd | Wholesale & retail | 2015 |
| Burnham House Developments Limited | Construction | 2023 |
| Burnhope Renewables Limited | Energy | 2024 |
| Burnthebook Limited | Information & communication | 2002 |
| Burridge - Oliver (Slating & Tiling) Limited | Construction | 2009 |
| Burridge Oliver (Holdings) Limited | Financial services | 2016 |
| Burrow and Branch PUB Co Limited | Hospitality | 2025 |
| Burrows Recovery Limited | Transport & logistics | 2002 |
| Burton 545 Limited | Real estate | 2025 |
| Burton Dessert Limited | Hospitality | 2026 |
| Burton Grillhouse Limited | Hospitality | 2025 |
| Burton Joinery Limited | Construction | 2014 |
| Burton Joyce RMC Limited | Households | 2023 |
| Burton Local Ltd | Wholesale & retail | 2025 |
| Burton Midway Limited | Construction | 2018 |
| Burton Road Auto Centre Limited | Wholesale & retail | 2006 |
| Burton Sheet Metal Limited | Manufacturing | 1997 |
| Bury Hill Angling Club Limited | Agriculture & fishing | 2016 |
| Bury Hill Fisheries Limited | Agriculture & fishing | 2002 |
| BUS Bar Hire Ltd | Wholesale & retail | 2018 |
| Busa Transport Ltd | Transport & logistics | 2019 |
| Business Accommodation Solutions Ltd | Administrative & support | 2024 |
| Business Action Centre (BAC) Limited | Real estate | 2022 |
| Business Consultants 4U LLP | | 2012 |
| Business Document Hub Ltd | Administrative & support | 2023 |
| Business Fasttrack Limited | Information & communication | 2016 |
| Business Integrity Matters Limited | Professional & scientific | 2025 |
| Business Investments Limited | Construction | 2024 |
| Business IT Management & Consultancy Services Limited | Information & communication | 2012 |
| Business Maker Limited | Administrative & support | 2021 |
| Business Mentor Academy Ltd | Other services | 2019 |
| Business Plus Consultants Ltd | Wholesale & retail | 2013 |
| Business Saving Experts Ltd | Other services | 2022 |
| Buster Jimmy CV Limited | Professional & scientific | 2022 |
| Buster Jimmy Finance Holdings Ltd | Financial services | 2022 |
| Buster Jimmy Finance Limited | Financial services | 2019 |
| Buster Jimmy Glendower Ltd | Financial services | 2021 |
| Buster Jimmy Gryphon Ltd | Financial services | 2021 |
| Buster Jimmy Holdco Limited | Financial services | 2022 |
| Buster Jimmy Investments Limited | Financial services | 2019 |
| Buster Jimmy Limited | Professional & scientific | 2012 |
| Buster Jimmy Private Equity Limited | Financial services | 2022 |
| Buster Jimmy S4S Limited | Financial services | 2022 |
| Bustler Derby Ltd | Hospitality | 2017 |
| Bustler Holdings Ltd | Financial services | 2026 |
| Bustler Nottingham Ltd | Hospitality | 2026 |
| Bustupik Ltd | Wholesale & retail | 2025 |
| Busy Box Limited | Financial services | 2014 |
| Busythings (Holdings) Limited | Information & communication | 2019 |
| Busythings Holdings Group Limited | Information & communication | 2026 |
| Busythings Limited | Information & communication | 2000 |
| Butcher and BAB Limited | Hospitality | 2018 |
| Bute Living Limited | Real estate | 2018 |
| Butler Group Holdings Limited | Financial services | 2025 |
| Butler M Ltd | Manufacturing | 2018 |
| Butler Recruitment Limited | Financial services | 2019 |
| Butler Reynolds Limited | Wholesale & retail | 1980 |
| Butlers RPS Limited | Real estate | 2022 |
| Butopia Ltd | Wholesale & retail | 2024 |
| Butt Heads Brew Co Limited | Hospitality | 2022 |
| Butterflies EDC Ltd | Health & social care | 2023 |
| Butterfly Blue Day Nurseries Limited | Education | 2012 |
| Buxton and Gidlow Ltd | Real estate | 1999 |
| Buxton Brothers (Heanor) Limited | Construction | 1949 |
| Buxton Firewood Supplies Ltd | Agriculture & fishing | 2025 |
| Buxton Joinery Limited | Construction | 2014 |
| Buxton Property & Maintenance Limited | Real estate | 2025 |
| Buynext Ltd | Wholesale & retail | 2025 |
| Buzmasol Ltd | Information & communication | 2026 |
| BV Direct Limited | Wholesale & retail | 2015 |
| BV Investments (Derby) Ltd | Real estate | 2020 |