| Belper Window Cleaners Limited | Administrative & support | 2013 |
| Belston BMS Ltd | Construction | 2026 |
| Bemo Project Engineering UK Limited | Construction | 2007 |
| BEN Finch Supply Chain Ltd | Administrative & support | 2023 |
| BEN Joyce Appliances Ltd | Construction | 2026 |
| Benson Developments (Derby) Ltd | Real estate | 2016 |
| Benz Bavarian Limited | Wholesale & retail | 1999 |
| Better Flooring Ltd | Construction | 2018 |
| Beyond Spreadsheets Ltd | Information & communication | 2025 |
| Beyond Tutoring Derbyshire Ltd | Education | 2026 |
| BFJ Buxton Ltd | Hospitality | 2024 |
| BFJ Buxton PUB Ltd | Hospitality | 2024 |
| BHB Limited | Hospitality | 2021 |
| Bhsafety Consulting Limited | Professional & scientific | 2013 |
| Bicester ARC Management Company Limited | Real estate | 2023 |
| Big G Belper Ltd | Hospitality | 2026 |
| Bijou Enterprises Belper Ltd | Real estate | 2026 |
| Bijou Enterprises Ltd | Real estate | 2026 |
| BJE Quantity Surveying Ltd | Professional & scientific | 2018 |
| BK Developments (Belper) Limited | Real estate | 2025 |
| Black Dust Creations Ltd | Information & communication | 2019 |
| Black Orchid Limited | Real estate | 2026 |
| Black Rocks Distillery Limited | Manufacturing | 2024 |
| Black Warren Limited | Information & communication | 2022 |
| Blackbrook House Ltd | Hospitality | 2019 |
| Blackbrook Plant Operators Ltd | Construction | 2018 |
| Blacksmith's Forge Homes Limited | Construction | 2017 |
| Blade and Press Ltd | Hospitality | 2017 |
| Blake Associates Limited | Real estate | 2007 |
| Blockboxe Ltd | Information & communication | 2025 |
| Bloom Within Psychotherapy Ltd | Health & social care | 2020 |
| Blue FIN Creative Ltd | Professional & scientific | 2023 |
| Blue JAY Openers Limited | Manufacturing | 2022 |
| Blue Sky BI Ltd | Information & communication | 2014 |
| Bluefabric Multimedia Limited | Information & communication | 2003 |
| Bluishe Consulting Ltd | Information & communication | 2017 |
| Blunt Composites Ltd | Manufacturing | 2017 |
| BMC Group Services Limited | Construction | 2025 |
| Bo'Ness Retail Development Limited | Real estate | 2011 |
| Body A-Wake Limited | Arts & recreation | 2008 |
| Boltercourt Limited | Real estate | 1974 |
| Bond Street Catering Limited | Extraterritorial | 2001 |
| Bonkers Illumination Bar Ltd | Hospitality | 2023 |
| Bonkers Illumination Golf Ltd | Arts & recreation | 2023 |
| Boothswood Limited | Financial services | 2017 |
| Bosnia UK Imports Limited | Wholesale & retail | 2022 |
| Boulevard Property Management Company Limited | Real estate | 2025 |
| Bowmer & Kirkland (London) Limited | Construction | 1988 |
| Bowmer and Kirkland Limited | Construction | 1961 |
| Bowyer Holdings Limited | Real estate | 2020 |
| BPF Painting & Decorating Ltd | Construction | 2025 |
| Brace Golf Ltd | Manufacturing | 2023 |
| Bradbourne Cottages Limited | Real estate | 2021 |
| Bradley Brothers Ltd | Transport & logistics | 2019 |
| Bradxholmes Limited | Information & communication | 2025 |
| Braithwaite Mcdonnell Limited | Extraterritorial | 2016 |
| Bramber 1954 Limited | Extraterritorial | 2013 |
| Brand X Marketing & Sales Limited | Information & communication | 2013 |
| Brandman Digital Limited | Professional & scientific | 2018 |
| Brewin Distributions Ltd | Wholesale & retail | 2025 |
| Broadhurst ERP Consulting Ltd | Information & communication | 2026 |
| Broadleaf Limited | Wholesale & retail | 1997 |
| Broadway Fields Company Limited | Households | 2025 |
| Brook Energy Consulting Limited | Professional & scientific | 2025 |
| Brook Farm Windley Limited | Agriculture & fishing | 2005 |
| Brooke Property Investments Ltd | Real estate | 2026 |
| Brooke Property Management Limited | Real estate | 2012 |
| Brookhouse Education Associates Ltd | Education | 2015 |
| Brooks Babies Limited | Arts & recreation | 2021 |
| Brooks Home Improvements Limited | Construction | 2023 |
| Brooks Wright Limited | Professional & scientific | 2016 |
| Brough Services (Derby) Limited | Construction | 1998 |
| BT Engineering Ltd | Professional & scientific | 2015 |
| Bubolechka Ltd | Real estate | 2025 |
| Bullsmoor Developments Limited | Construction | 1981 |
| Bumblegreen Studio Limited | Information & communication | 2009 |
| Burton Management Company Ltd | Administrative & support | 2015 |
| Busy B Cleaning Services Ltd | Administrative & support | 2022 |
| Butcher & SON Developments Limited | Construction | 2021 |
| Butler Windsor Limited | Extraterritorial | 1999 |
| Buxton Chiropractic Ltd | Health & social care | 2022 |
| Buxton Kelly Investments Limited | Real estate | 2017 |
| Buzz Fire & Security Ltd | Public administration | 2020 |
| Buzzin.Life Limited | Wholesale & retail | 2023 |
| Buzzy Bees Physiotherapy Ltd | Other services | 2024 |
| Byard Design Limited | Professional & scientific | 2019 |
| C & C Autocentres Limited | Wholesale & retail | 2016 |
| C Eaton Joinery Limited | Construction | 2006 |
| C F Vernon Gate Ltd | Real estate | 2013 |
| C J Bradshaw Ltd | Manufacturing | 2024 |
| C M Painting and Decorating Ltd | Construction | 2019 |
| C.B.Eaton Joinery Ltd | Manufacturing | 2015 |
| C.Holmes Limited | Professional & scientific | 2012 |
| C6 Diamond Ltd | Manufacturing | 2019 |
| Cactus Images Limited | Professional & scientific | 2008 |
| Cadelec Building Services Limited | Professional & scientific | 2008 |
| Cadwell Services Limited | Extraterritorial | 2022 |
| Cafe Express Coventry Limited | Hospitality | 2023 |
| Cafe Express Loughborough Limited | Hospitality | 2022 |
| Cafe Express Stoke Limited | Hospitality | 2023 |