| Bijou Hair & Beauty Limited | Other services | 2008 |
| Bijou Holistic Ltd | Health & social care | 2025 |
| Bijou Training Academy Ltd | Education | 2021 |
| Bike Works Derby Ltd | Wholesale & retail | 2016 |
| Bilan Consultancy Ltd | Agriculture & fishing | 2013 |
| Bilan Holdings Ltd | Financial services | 2021 |
| Bilan Properties Limited | Real estate | 2025 |
| Bilbie Investment Company Ltd | Real estate | 2019 |
| Billionaire Bro’S Club Ltd | Professional & scientific | 2025 |
| Billy Edwards Ltd | Information & communication | 2019 |
| Billy RAY Sales Limited | Wholesale & retail | 2013 |
| Billys Building Solutions Limited | Construction | 2025 |
| Billysmash Limited | Hospitality | 2025 |
| Billy’S Transport & Haulage Ltd | Transport & logistics | 2025 |
| Bilton Healthcare UK Limited | Wholesale & retail | 2025 |
| Bimal Limited | Health & social care | 2002 |
| BIMK88 Ltd | Transport & logistics | 2022 |
| BIN Wizard Ltd | Administrative & support | 2021 |
| Binary Intelligence Limited | Information & communication | 2026 |
| BINARYFOLD4 Limited | Information & communication | 2010 |
| Binconey Limited | Information & communication | 1985 |
| Bindefeld Holdings Limited | Financial services | 2018 |
| Bindefeld Property Limited | Real estate | 2015 |
| Binder Creations Limited | Manufacturing | 2007 |
| Bindiya Patel Limited | Financial services | 2020 |
| Binga Investment Limited | Real estate | 2025 |
| Binys the Barbershop Ltd | Other services | 2023 |
| Biocas Brickwork Specialists Ltd | Construction | 2019 |
| Bioclean Products Limited | Wholesale & retail | 2006 |
| Bioclear Limited | Manufacturing | 2018 |
| Bionical CTS Limited | Wholesale & retail | 2025 |
| Bionical Health Group Limited | Information & communication | 2024 |
| Bionical Health Limited | Information & communication | 2023 |
| Bionical Limited | Wholesale & retail | 2009 |
| Bionical Solutions Limited | Information & communication | 2001 |
| Bionical Virtual Engagement Limited | Information & communication | 2024 |
| Biopro Environmental Europe Limited | Administrative & support | 2014 |
| Biotaware Ltd | Information & communication | 2016 |
| Biotaware Services Ltd | Administrative & support | 2017 |
| Birch & Porter Ltd | Transport & logistics | 2025 |
| Birch Facilities Management Ltd | Administrative & support | 2005 |
| Birch Homes Limited | Construction | 1987 |
| Birch Limited | Professional & scientific | 1990 |
| Birch Tree Hill Limited | Information & communication | 2019 |
| Bircher Building Services Ltd | Construction | 2007 |
| Birchfields Heating Service Limited | Construction | 1962 |
| Birchover Events Limited | Administrative & support | 2022 |
| Birchover Sport Events Limited | Administrative & support | 2022 |
| Birchwild Properties Limited | Real estate | 2024 |
| Birchwood House Investments Limited | Professional & scientific | 2024 |
| Birdcage Design Limited | Wholesale & retail | 2012 |
| Birds (Derby) Pension Trustee Limited | Financial services | 2020 |
| Birds Bakery Holdings Ltd | Manufacturing | 2022 |
| Birdtour Asia Limited | Administrative & support | 2007 |
| Birkacre Park Management Company Limited | Households | 2008 |
| Birmingham Tamatanga Ltd | Hospitality | 2016 |
| Birtles Computing Company Ltd | Financial services | 2024 |
| Biryani Love Limited | Hospitality | 2025 |
| Biryaniz Derby Ltd | Hospitality | 2024 |
| Bishad Resources Ltd | Wholesale & retail | 2025 |
| Bishop Properties Limited | Real estate | 1979 |
| Bishop's Lodge Management Company Limited | Real estate | 2013 |
| Bismillah Family Butchers (Derby) Ltd | Wholesale & retail | 2024 |
| Bison Group Ltd | Administrative & support | 2025 |
| Bison Shield UK Ltd | Wholesale & retail | 2025 |
| Bitewise Bakery and Confectionery Limited | Manufacturing | 2025 |
| Bitez & Blendz Limited | Hospitality | 2025 |
| Bitez Grillz Ltd | Wholesale & retail | 2026 |
| Bitmist Limited | Information & communication | 2019 |
| Bitomer Ltd | Manufacturing | 2018 |
| Bits and Pixels Limited | Wholesale & retail | 2008 |
| Bittersweet Chocolates Limited | Manufacturing | 2007 |
| Biwood Management Limited | Wholesale & retail | 2025 |
| Biznaga Properties Ltd | Real estate | 2021 |
| Bizpoint Solutions Limited | Hospitality | 2009 |
| BJ Motors Limited | Wholesale & retail | 2013 |
| Bjew Holdings Limited | Financial services | 2025 |
| BJG Services (Derby) Holdings Ltd | Financial services | 2020 |
| BJL Homes Ltd | Real estate | 2026 |
| Bjmc Building Services Ltd | Construction | 2018 |
| Bjorn Consultancy Ltd | Information & communication | 2024 |
| BK Construction Ltd | Construction | 2019 |
| BK Express Limited | Transport & logistics | 2023 |
| BK Johal Properties Limited | Real estate | 2023 |
| BK Performance Ltd | Wholesale & retail | 2025 |
| BK Solutions Ltd | Health & social care | 2014 |
| BKN Developers Ltd | Construction | 2024 |
| Bksk Care Limited | Health & social care | 2026 |
| BKY INT Ltd | Wholesale & retail | 2024 |
| BKZ Development Limited | Households | 2025 |
| BL Boutique Dent Ltd | Health & social care | 2020 |
| BL Impex Ltd | Wholesale & retail | 2021 |
| BL Padel Limited | Arts & recreation | 2024 |
| Black Angel Machinery Ltd | Administrative & support | 2025 |
| Black Bits Ltd | Information & communication | 2016 |
| Black Colony Apparel Limited | Wholesale & retail | 2025 |
| Black Diamond Services Ltd | Transport & logistics | 2016 |
| Black Fern Healthcare Ltd | Wholesale & retail | 2024 |
| Black FOX Capital Partners Limited | Professional & scientific | 2019 |
| Black Hole Brewery Limited | Manufacturing | 2014 |