| Blossoms Home Care Ltd | Administrative & support | 2024 |
| Blou Label Ltd | Wholesale & retail | 2025 |
| BLR Yorkshire Ltd | Manufacturing | 2023 |
| Blrconstruct Ltd | Construction | 2025 |
| Blsh Limited | Information & communication | 2024 |
| BLU Onyx Limited | Real estate | 2026 |
| Blue & White Limited | Extraterritorial | 1985 |
| Blue 101 Ltd | Professional & scientific | 2012 |
| Blue Bay Holidays Limited | Hospitality | 2021 |
| Blue Corner Shop Limited | Wholesale & retail | 2026 |
| Blue Cuckoo Creative Limited | Professional & scientific | 2022 |
| Blue Horizon Transport Limited | Transport & logistics | 2025 |
| Blue Lagoon Enterprise UK Ltd | Real estate | 2025 |
| Blue Lane Solutions Ltd | Transport & logistics | 2026 |
| Blue Leaf Distribution Ltd | Wholesale & retail | 2023 |
| Blue Pharma Care Ltd | Health & social care | 2024 |
| Blue Ridge Mortgages Limited | Financial services | 2019 |
| Blue Sapphire Middle East Investments Limited | Financial services | 2022 |
| Blue Sky Shop Fronts Ltd | Other services | 2017 |
| Blue Store Ivegate Ltd | Wholesale & retail | 2024 |
| Blue Sun Real Estate Limited | Real estate | 2022 |
| Blue Sunshine Limited | Hospitality | 2024 |
| Blue Tape Ltd | Administrative & support | 2021 |
| Blue Tech (Bradford) Limited | Wholesale & retail | 2023 |
| Blue Test Limited | Other services | 2021 |
| Bluebell Motorhouse Limited | Wholesale & retail | 2019 |
| Blueberry International Ltd | Wholesale & retail | 2024 |
| Blueberry IT Solutions Ltd | Information & communication | 2014 |
| Bluefinch Fashions Limited | Information & communication | 2023 |
| Bluegatex Ltd | Information & communication | 2025 |
| Bluegrid Global Technologies Ltd | Wholesale & retail | 2026 |
| Bluegroup Mechanical and Electrical Limited | Wholesale & retail | 2026 |
| Blueline Auto Parts Ltd | Wholesale & retail | 2025 |
| Blueline College Limited | Education | 2019 |
| Blueline Consultants Limited | Professional & scientific | 2017 |
| Bluemount Construction Ltd | Construction | 2025 |
| Blueoaks Developments Limited | Construction | 2025 |
| Blues HQ Limited | Other services | 2022 |
| Blues Medical Limited | Health & social care | 2024 |
| Blues Medispa Ltd | Other services | 2026 |
| Blues WQ Ltd | Other services | 2024 |
| Bluesky 3 Developments Ltd | Real estate | 2024 |
| Bluesky 3 Investments Ltd | Real estate | 2024 |
| Bluesky 4 Developments Ltd | Real estate | 2026 |
| Bluesky BFD Limited | Real estate | 2020 |
| Bluestone Films Limited | Arts & recreation | 2004 |
| Bluewater Real Estate Limited | Households | 2021 |
| Blurred Vision Productions Ltd | Information & communication | 2020 |
| Blush Beauty Training Academy Ltd | Other services | 2021 |
| Blush Zone Ltd | Other services | 2020 |
| Bluskye Investments Ltd | Real estate | 2017 |
| BLW Properties Limited | Real estate | 2005 |
| Blynexa Ltd | Wholesale & retail | 2025 |
| Blynk Group LLP | | 2013 |
| BM & BM Ltd | Wholesale & retail | 2022 |
| BM Autoclinic Ltd | Wholesale & retail | 2024 |
| BM Car Mats Ltd | Wholesale & retail | 2021 |
| BMA Car Care Ltd | Wholesale & retail | 2025 |
| BMC Bradford Marine Centre Ltd | Agriculture & fishing | 2020 |
| BMC Electrical Services Limited | Construction | 2000 |
| BMC Law Limited | Professional & scientific | 2013 |
| BMC Yorkshire Ltd | Wholesale & retail | 2021 |
| BMC-2025 Ltd | Professional & scientific | 2025 |
| BMD News Ltd | Information & communication | 2024 |
| Bmds Holdings Limited | Real estate | 2023 |
| BMH Blade Limited | Professional & scientific | 1965 |
| BMI Tech Solutions Limited | Information & communication | 2017 |
| BMK Services Ltd | Administrative & support | 2023 |
| BMM Courier Ltd | Transport & logistics | 2024 |
| BMS Talent Solutions Limited | Administrative & support | 2023 |
| BMZ Properties Ltd | Real estate | 2024 |
| BN Homes Limited | Real estate | 2022 |
| BN Property Management Ltd | Real estate | 2025 |
| BN Renovations Limited | Construction | 2010 |
| BN Skips Recycling Solutions Ltd | Water & waste | 2026 |
| Bnb's Inflatable Hire Limited | Arts & recreation | 2017 |
| BNI Ltd | Wholesale & retail | 2019 |
| Bnktop Barbers Ltd | Extraterritorial | 2025 |
| BNL Logistics Ltd | Transport & logistics | 2025 |
| BNM Group Ltd | Construction | 2019 |
| Bnmsr Ltd | Health & social care | 2023 |
| BNS Trading Ltd | Information & communication | 2021 |
| Boar and Fable Ltd | Hospitality | 2025 |
| BOB Consultancy Ltd | Information & communication | 2016 |
| BOB Services Limited | Other services | 2019 |
| Bobbin and Bumble Ltd | Wholesale & retail | 2024 |
| Bobs and Bits UK Ltd | Wholesale & retail | 2024 |
| Bobsy Investments Ltd | Real estate | 2021 |
| Boca Limited | Professional & scientific | 2024 |
| Bodbox Ltd | Wholesale & retail | 2016 |
| Bods Limited | Professional & scientific | 2003 |
| Bodtech Computer Limited | Information & communication | 2025 |
| Body Image Coach Community Interest Company | Education | 2023 |
| Body Revolution Ltd | Health & social care | 2019 |
| Body Sculpture International Europe Limited | Professional & scientific | 2006 |
| Bodyflex Bradford Ltd | Arts & recreation | 2022 |
| Bodylogiic Ltd | Health & social care | 2021 |
| Bodyrestore Rehab Limited | Professional & scientific | 2026 |
| Bogle Boxing Academy Limited | Arts & recreation | 2025 |
| Bogle Boxing CIC | Education | 2024 |