| Bella&Snoopy Limited | Real estate | 2023 |
| Bellajo Consulting Ltd | Information & communication | 2014 |
| Bellajo Productions Ltd | Arts & recreation | 2014 |
| Belle Skin Clinic Ltd | Other services | 2025 |
| Belle VIE Rentals Chesterfield Ltd | Real estate | 2025 |
| Belleza Aesthetics Ltd | Health & social care | 2019 |
| Bellfield Construction Limited | Construction | 2014 |
| Bellfield Lettings Limited | Real estate | 2018 |
| Bels Roofing Limited | Construction | 2025 |
| Belvoir Moss Removal MAN Limited | Construction | 2026 |
| BEN Barnicoat Services Ltd | Education | 2018 |
| BEN Chambers Management Services Ltd | Professional & scientific | 2022 |
| BEN Powell Automotive Ltd | Wholesale & retail | 2023 |
| BEN Wood Group Ltd | Construction | 2018 |
| Benji Noodle Ltd | Wholesale & retail | 2023 |
| Bennett's Construction Limited | Construction | 2025 |
| Bentley Walk Apartments Management Company Ltd | Households | 2024 |
| Bentley Walk Management Company Ltd | Households | 2023 |
| Benzi Camper Conversions Ltd | Manufacturing | 2017 |
| Beresfords Mobile Mechanics Limited | Wholesale & retail | 2025 |
| Berg Enterprise Limited | Transport & logistics | 2020 |
| Berkeley DE Veer (Easingwold) Limited | Construction | 2020 |
| Berkeley DE Veer (North East) Limited | Construction | 2016 |
| Berkeley DE Veer (Southern) Limited | Construction | 2020 |
| Berkeley DE Veer Holdings Ltd | Extraterritorial | 2019 |
| Berkeley DE Veer Investments Limited | Construction | 2018 |
| Berkeley DE Veer Limited | Construction | 2014 |
| Bespoke Blinds Limited | Wholesale & retail | 2006 |
| Bespoke Brows by Hannah Limited | Health & social care | 2018 |
| Bespoke Casual Ltd | Wholesale & retail | 2025 |
| Bespoke Leasing Limited | Administrative & support | 2024 |
| Bespoke PM Limited | Professional & scientific | 2023 |
| Bespoke Projects Construction Ltd | Construction | 2024 |
| Best View Designers Ltd | Construction | 2025 |
| Bestwick Estates Limited | Construction | 2014 |
| Bestwick Estates Management Limited | Real estate | 2021 |
| Beta International (UK) Limited | Transport & logistics | 2020 |
| Bethel Adorn&Decors Ltd | Construction | 2024 |
| Better Driven Ltd | Transport & logistics | 2015 |
| Beverage GAS Limited | Extraterritorial | 2003 |
| Bexton`S Butchers Limited | Wholesale & retail | 2005 |
| Beyond Consultants Limited | Professional & scientific | 2003 |
| Beyond IT Services Ltd | Professional & scientific | 2017 |
| Beyond Masonry U.K Ltd | Construction | 2025 |
| Beyond the Box Counselling Services Ltd | Education | 2012 |
| BF Financial Planning Limited | Professional & scientific | 2018 |
| Bfkc Ltd | Hospitality | 2026 |
| BH Linked Services Ltd | Real estate | 2023 |
| BHA Haulage Ltd | Transport & logistics | 2025 |
| BHH Developments Limited | Construction | 1997 |
| Bhogal Holdings Limited | Financial services | 2022 |
| BI GAS Supplies Limited | Extraterritorial | 2012 |
| BI Group Limited | Professional & scientific | 1948 |
| BI Group Properties Limited | Professional & scientific | 1986 |
| BI Group Services Limited | Professional & scientific | 1987 |
| BI Industrial Limited | Professional & scientific | 1990 |
| BI Plastics Limited | Professional & scientific | 1987 |
| BI Precision Limited | Professional & scientific | 1991 |
| Bidlec Limited | Construction | 2007 |
| Bidwell Investments Ltd | Real estate | 2020 |
| Big Catering Ltd | Hospitality | 2024 |
| Big Roar Ltd | Professional & scientific | 2015 |
| Big Tree Consulting Limited | Information & communication | 2009 |
| Big Turtle Car Company Ltd | Wholesale & retail | 2017 |
| Big Village Games Ltd | Information & communication | 2020 |
| Bigbenfamilygroup Ltd | Health & social care | 2024 |
| Bigpulse Europe Limited | Professional & scientific | 2003 |
| Bike Track Limited | Extraterritorial | 2006 |
| Bilalsaddique Clothing Ltd | Wholesale & retail | 2019 |
| Bill Lomas (Motor Cycles) Limited | Wholesale & retail | 1955 |
| Bill Norman Estates Ltd | Real estate | 2020 |
| Bilstein Properties UK Ltd | Construction | 2015 |
| Bilstein Trading UK Ltd | Real estate | 2016 |
| Bilton Property (17 and 26) Limited | Construction | 2021 |
| Bilton Property (Anchor) Limited | Real estate | 2021 |
| Bilton Property (Saltergate) Limited | Real estate | 2024 |
| Bilton Property (Thoresby Street) Limited | Real estate | 2024 |
| Bilton Property Services Limited | Real estate | 2013 |
| Bingham Homes Limited | Real estate | 2020 |
| Bingham Rail(Ds) Limited | Manufacturing | 2010 |
| BIO 8 Industrial Ltd | Manufacturing | 2021 |
| BIO 8 Ltd | Agriculture & fishing | 2006 |
| Birches Brow Holdings Limited | Financial services | 2022 |
| Bird Security Consultants Ltd | Other services | 2016 |
| Birdholme Farm Limited | Real estate | 2016 |
| Birds Property Investments Ltd | Real estate | 2025 |
| Birkenhead Collection Limited | Real estate | 2025 |
| Birks Holdings Ltd | Financial services | 2022 |
| Birks Properties Limited | Real estate | 2019 |
| Birley Grange Estates Limited | Extraterritorial | 2011 |
| Birmingham Skills Academy Limited | Extraterritorial | 2020 |
| Bishop Mortgages Limited | Financial services | 2013 |
| Bishops Quarter (Sherburn) Management Company Limited | Households | 2024 |
| BIT Loopy Games Limited | Information & communication | 2008 |
| Bite to EAT 1 Ltd | Hospitality | 2023 |
| Bitz 'N' Pc'Z Limited | Information & communication | 2006 |
| Biuk Medica Limited | Wholesale & retail | 2023 |
| BIX Homes Ltd | Construction | 2020 |
| BIX Property Development Ltd | Real estate | 2015 |
| Bizlink Tailor-Made Cable UK Limited | Manufacturing | 2000 |