| Bhattia Ltd | Health & social care | 2020 |
| Bhdh Enterprise Ltd | Wholesale & retail | 2024 |
| Bhulet Bathroom and Kitchen Fitters Ltd | Construction | 2025 |
| Biccys Limited | Hospitality | 2025 |
| Big Discount (Dewsbury) Ltd | Wholesale & retail | 2016 |
| Big Fellas Limited | Hospitality | 2015 |
| Bilal Yakub Locums Ltd | Health & social care | 2009 |
| Bilamdh Solutions Ltd | Information & communication | 2024 |
| Biofusion Care Ltd | Public administration | 2025 |
| Birkdale 1963 Limited | Extraterritorial | 2014 |
| Birkdale Foods (Batley) Ltd | Hospitality | 2024 |
| Birmingham Direct Support Services Ltd | Professional & scientific | 2025 |
| Birria Bandits Ltd | Hospitality | 2022 |
| Bisham Roberts Ltd | Professional & scientific | 2024 |
| Bismillah Butchers MF Ltd | Wholesale & retail | 2026 |
| Bison Leeds Limited | Hospitality | 2024 |
| Bison Storage Holdings Limited | Financial services | 2020 |
| Bison Storage Services Limited | Transport & logistics | 2003 |
| Bistro 26 Dewsbury Limited | Hospitality | 2023 |
| Bizzy Parties Ltd | Other services | 2018 |
| BK Halal Mobile Butchers Ltd | Wholesale & retail | 2023 |
| Black Bear Recruitment Ltd | Administrative & support | 2020 |
| Black Opal Estates Ltd | Real estate | 2024 |
| Black Seed Farms Ltd | Administrative & support | 2024 |
| Black Swan PUB Co Ltd | Hospitality | 2025 |
| Blackburns Waste Disposal Limited | Water & waste | 1996 |
| Blackstone Properties (Yorkshire) Ltd | Real estate | 2024 |
| Blameless Juice Co Ltd | Wholesale & retail | 2019 |
| Bland Electrical Services Ltd | Construction | 2022 |
| Blenheim Financial Services Limited | Professional & scientific | 2024 |
| Blenheim Property Investments Limited | Real estate | 2023 |
| Blessed Peter Snow Catholic Academy Trust | Education | 2014 |
| Blhealthyvending Ltd | Manufacturing | 2024 |
| Bliss Supports Limited | Health & social care | 2023 |
| Bloom Retail Limited | Wholesale & retail | 2025 |
| Blossomandrest Limited | Wholesale & retail | 2025 |
| Blue Buraq Services Ltd | Wholesale & retail | 2024 |
| Blue Estates Limited | Construction | 2002 |
| Blue Khan Ltd | Hospitality | 2024 |
| Blue Mantle Investments Ltd | Financial services | 2025 |
| Blue Riband Limited | Financial services | 2021 |
| Blue Star Pharma Ltd | Health & social care | 2022 |
| Bluebell Health Ltd | Wholesale & retail | 2026 |
| Blueglo Services Ltd | Health & social care | 2022 |
| Bluevaria Investments and Proceeds Ltd | Financial services | 2022 |
| Bluubean Limited | Households | 2015 |
| BM Electrics and Home Improvements Ltd | Construction | 2023 |
| Bmcbargains Limited | Wholesale & retail | 2023 |
| BMM Consultancy Ltd | Professional & scientific | 2022 |
| Bobbys Smash Burgers Limited | Hospitality | 2023 |
| Bodanskis Ltd | Hospitality | 2024 |
| Bodens Ltd | Wholesale & retail | 2024 |
| Body Ease Ltd | Manufacturing | 2004 |
| Bond Publishers Ltd | Information & communication | 2025 |
| Booraq Limited | Construction | 2015 |
| Botla Ltd | Hospitality | 2026 |
| Boxking Sports Academy Ltd | Education | 2024 |
| BPM4 Limited | Information & communication | 2012 |
| Brabyns Brow Restaurant Limited | Hospitality | 2017 |
| Bradley Walton T/A the Ponty Tavern Ltd | Hospitality | 2024 |
| Branch FM | Information & communication | 2007 |
| BRANDS2MORE Limited | Wholesale & retail | 2021 |
| Bratek Mini Market Ltd | Wholesale & retail | 2024 |
| Breezy Buy Limited | Wholesale & retail | 2026 |
| Breitstone Enterprise Ltd | Other services | 2022 |
| Breitstone Estates Ltd | Extraterritorial | 2022 |
| Brentwood Automotive Ltd | Wholesale & retail | 2022 |
| Brett Yarrows Transport Ltd | Transport & logistics | 2025 |
| Bretton Properties Limited | Real estate | 2006 |
| Bretton Real Estate Ltd | Real estate | 2020 |
| Brian Degnan Limited | | 1983 |
| Brigantia Creative Ltd | Administrative & support | 2020 |
| Briggs Property Refreshers Limited | Administrative & support | 2025 |
| Brighouse Timber Company Limited | | 1982 |
| Bright Blox Ltd | Professional & scientific | 2022 |
| Brighter Future Group Ltd | Education | 2023 |
| Brightfolk HR Ltd | Professional & scientific | 2025 |
| Brightwave Group Limited | Other services | 2025 |
| Brilliant Minds (Learning Centres) Limited | Education | 2017 |
| Brisant Secure Ltd | Manufacturing | 2011 |
| Britannia Translations Ltd | Professional & scientific | 2024 |
| Broad ST Properties Ltd | Construction | 2021 |
| Brocklehurst Holdings Ltd | Financial services | 2019 |
| Brofeeds Limited | Agriculture & fishing | 1987 |
| Brookfield Investments (NO.1) Ltd | Financial services | 2020 |
| Brookfield Property (Holdings) Ltd | Wholesale & retail | 2008 |
| Brookfield Retail Ltd | Wholesale & retail | 2014 |
| Brownie Bites Ltd | Hospitality | 2023 |
| Bstoreglobal Ltd | Wholesale & retail | 2026 |
| BTC Exterior Cleaning Ltd | Administrative & support | 2026 |
| BTS Beds Ltd | Manufacturing | 2019 |
| Bubble and Burst Limited | Hospitality | 2024 |
| Buildbeast Limited | Construction | 2018 |
| Bukta Sportswear Limited | Manufacturing | 2018 |
| Bulbulia Consultancy Limited | Information & communication | 2012 |
| Bullion Xpress.Co.Uk Limited | Other services | 2022 |
| Bunz Ltd | Wholesale & retail | 2020 |
| Burger Bronx Ltd | Hospitality | 2024 |
| Burton Beds Limited | Manufacturing | 2020 |
| Business Intelectuals Limited | Other services | 2023 |