| Blue Mountain Properties Limited | Real estate | 2009 |
| Blue Mountain Properties Southern Limited | Real estate | 2019 |
| Blue Ocean Chippy Limited | Hospitality | 2023 |
| Blue Ocean Fish Bar and Kebabs Ltd | Hospitality | 2020 |
| Blue Pine Caravan Storage Ltd | Transport & logistics | 2025 |
| Blue Pool Homes Ltd | Real estate | 2025 |
| Blue Roan Consulting Ltd | Professional & scientific | 2015 |
| Blue Sky Care Limited | Health & social care | 2006 |
| Blue Sky Care Group Ltd | Other services | 2016 |
| Blue Sky Football Ltd | Arts & recreation | 2021 |
| Blue Sky Sports Limited | Arts & recreation | 2019 |
| Blue Sky Travel Services Ltd | Administrative & support | 2021 |
| Blue Spinnaker Limited | Professional & scientific | 2011 |
| Blue Wave Facilities (UK) Limited | Administrative & support | 2025 |
| Blue Whistle Ltd | Real estate | 2024 |
| Blue Whistling Duck Ltd | Manufacturing | 2016 |
| Bluebell (Tomlinson) Ltd | Hospitality | 2025 |
| Bluebell Dairy Limited | Manufacturing | 2007 |
| Bluebiome Ltd | Professional & scientific | 2025 |
| Bluebridgetraders Ltd | Wholesale & retail | 2025 |
| Bluechain & Link Supply Chain Limited | Wholesale & retail | 2026 |
| Bluecoast Group Limited | Construction | 2020 |
| Bluecore Capital Ltd | Financial services | 2023 |
| Bluefound Ltd | Administrative & support | 2023 |
| Blueline Commercial Limited | Construction | 2021 |
| Blueline Group (Derby) Limited | Financial services | 2023 |
| Blueline Residential Limited | Real estate | 2021 |
| Bluephase Limited | Construction | 2023 |
| Blueprint Consulting Group Limited | Professional & scientific | 2022 |
| Blueprint Financial Services (Midlands) Limited | Financial services | 2011 |
| Blueprint for Good Living Limited | Real estate | 2019 |
| Blueprint QS Limited | Professional & scientific | 2025 |
| Blueprint Sales Engine Ltd | Information & communication | 2025 |
| Bluesky Couriers Limited | Transport & logistics | 2020 |
| Blueswizz Ltd | Wholesale & retail | 2018 |
| Bluevibe Commerce Ltd | Wholesale & retail | 2026 |
| Blueville Limited | Professional & scientific | 2007 |
| Bluewave Enterprises Ltd | Transport & logistics | 2026 |
| Bluewave Maintenance Ltd | Construction | 2019 |
| Bluewave(Derby) Properties Limited | Real estate | 2023 |
| Bluezilla Collective Ltd | Professional & scientific | 2019 |
| Blunile Ltd | Professional & scientific | 2023 |
| Blunts Solicitors Ltd | Professional & scientific | 2014 |
| Bluu Sky Connections Limited | Information & communication | 2008 |
| Blyth Car Sales Ltd | Wholesale & retail | 2026 |
| Blythe Fields Estate Management Company Limited | Households | 2020 |
| BM Civil Engineering Ltd | Professional & scientific | 2024 |
| BM Tech Limited | Water & waste | 2005 |
| BM Technical Support Services Limited | Administrative & support | 2012 |
| BMC ASC Ltd | Financial services | 2023 |
| BMC Azurri GA Solutions Limited | Information & communication | 2013 |
| BMC Birmingham Marketing Company Ltd | Other services | 2025 |
| BMC Cable-Talk Limited | Information & communication | 2013 |
| BMC Equip Limited | Information & communication | 2013 |
| BMC Exect Ltd | Professional & scientific | 2019 |
| BMC Precept Limited | Administrative & support | 2013 |
| BMC Recruit Ltd | Administrative & support | 2023 |
| BME Service Engtech Ltd | Professional & scientific | 2019 |
| Bmfc Construction Ltd | Construction | 2025 |
| BMG Ltd | Information & communication | 2022 |
| BMI Investments Limited | Real estate | 2020 |
| BMR Construction (Midlands) Limited | Construction | 2026 |
| BMS Hair Limited | Other services | 2014 |
| BMW Car Club (Great Britain) Limited | Other services | 1982 |
| BNC 83/84/85 Ltd | Financial services | 2015 |
| BNG Properties One Ltd | Real estate | 2025 |
| BNS Derby Limited | Wholesale & retail | 2025 |
| Bntva Museum CIC | Arts & recreation | 2024 |
| Boali Limited | Real estate | 2025 |
| Boat Harbour Properties Limited | Real estate | 2009 |
| Boatyard Supplies Limited | Wholesale & retail | 2009 |
| BOB Barca Limited | Transport & logistics | 2013 |
| BOB Callender Engineering Services Ltd | Professional & scientific | 2023 |
| BOB Minion Limited | Wholesale & retail | 1959 |
| Bob's Building Service Ltd | Professional & scientific | 2021 |
| Bobbie Donovan OHA Ltd | Health & social care | 2016 |
| Bobo PUB Co Ltd | Hospitality | 2021 |
| Boccia England | Arts & recreation | 2009 |
| Bock Developments (Midlands) Limited | Real estate | 2022 |
| Bodhi Consulting Services Ltd | Information & communication | 2016 |
| Bodhi UX Limited | Professional & scientific | 2024 |
| Body in Mind Pilates Limited | Arts & recreation | 2005 |
| Boiler Beavers Limited | Construction | 2025 |
| Boiler Boss Ltd | Construction | 2011 |
| Boiler Repair Experts Limited | Construction | 2025 |
| Boiler Repair Pro Ltd | Construction | 2025 |
| Boiler Repair Specialist Ltd | Construction | 2023 |
| Boiler Room Exhibitions Ltd | Administrative & support | 2018 |
| Bold Move Creative Limited | Professional & scientific | 2022 |
| Bold Run Angel Publishing Limited | Wholesale & retail | 2024 |
| Bolek Drive Ltd | Transport & logistics | 2017 |
| Bolhoff Ltd | Wholesale & retail | 2025 |
| Bolib Limited | Health & social care | 2023 |
| Bollards and Cycle Shelters Limited | Professional & scientific | 2023 |
| Bolo Recovery Ltd | Administrative & support | 2025 |
| Bomb Squad Media Ltd | Administrative & support | 2020 |
| Bomead Limited | Hospitality | 2000 |
| Bona RES Ltd | Hospitality | 2024 |
| Bonika Ltd | Transport & logistics | 2019 |
| Bonington Grange Management Company Limited | Households | 2022 |