| Badotsa Ltd | Education | 2019 |
| Baert Research Ltd | Professional & scientific | 2026 |
| BAG Katering Limited | Hospitality | 2017 |
| Bagalad Ltd | Wholesale & retail | 2025 |
| Bageco Limited | Financial services | 2025 |
| Baghdad Wall International Trading Co., Ltd | Extraterritorial | 2020 |
| Bagno Trading Ltd | Extraterritorial | 2013 |
| Baibide (Holland) Group Co., Ltd. | Wholesale & retail | 2025 |
| Baichuan Import and Export Co., Ltd | Manufacturing | 2017 |
| Bailey and Carter Land Portfolio Builder Ltd | Real estate | 2025 |
| Bailey and Carter Portfolio Builder Ltd | Real estate | 2024 |
| Bailey Fisher Executive Search Limited | Administrative & support | 1998 |
| Bailey Fisher Holdings Limited | Professional & scientific | 2018 |
| Bailey Mews Management Ltd | Households | 1982 |
| Baiolee Limited | Wholesale & retail | 2025 |
| Baitech Management Limited | Real estate | 2023 |
| Baiv LP | | 2018 |
| Baiyun International Trading Co., Ltd | Extraterritorial | 2010 |
| Baked Coffee Shop Ltd | Hospitality | 2022 |
| Baker Accountancy Associates Limited | Professional & scientific | 1998 |
| Baker Richards Employee Trustee Limited | Extraterritorial | 2020 |
| Baker Studios Ltd | Administrative & support | 2020 |
| Balaban Kebab Ltd | Hospitality | 2021 |
| Balagan Limited | Real estate | 1999 |
| Balance Build Ltd | Construction | 2023 |
| Baldur PR Ltd | Professional & scientific | 2020 |
| Baldwin Court Management Company Limited | Households | 2001 |
| Balik Arts | Information & communication | 1999 |
| Balisun Limited | Construction | 1995 |
| Ball Coaching Ltd | Education | 2025 |
| Ballcroft Industries Limited | Manufacturing | 2017 |
| Balletpro Limited | Wholesale & retail | 2005 |
| Balloon Systems Limited | Information & communication | 2014 |
| Balmforth Care Group Ltd | Health & social care | 2024 |
| Balmoral Gardens (Littleover) Management Company Limited | Households | 2006 |
| Balsham Boilers Limited | Construction | 2012 |
| Balsham Dairy Limited | Hospitality | 2023 |
| Balsham Management Company Limited | Households | 2017 |
| Balsham Shoot Limited | Agriculture & fishing | 2018 |
| Balsham Spice House Limited | Hospitality | 2026 |
| Baltazar Health Ltd | Health & social care | 2024 |
| Baltec Ltd | Professional & scientific | 2024 |
| Baltic Sensei Ltd | Manufacturing | 2022 |
| Balvard Residential Holdings Limited | Real estate | 2024 |
| Balzano Catering Services Limited | Professional & scientific | 2022 |
| Balzano's Limited | Wholesale & retail | 2003 |
| Bamarook Ltd | Professional & scientific | 2010 |
| Bamber Estates Limited | Construction | 2026 |
| Bamber Outdoors Limited | Administrative & support | 2025 |
| Bamboo Apparel Co., Ltd | Wholesale & retail | 2024 |
| Bamboo Bridge Ltd | Professional & scientific | 2022 |
| Bamboo Hairdressing Limited | Other services | 2008 |
| Bamboo Sky Ltd | Hospitality | 2025 |
| Bamboos Media Ltd | Professional & scientific | 2024 |
| Bamini Trade Limited | Wholesale & retail | 2019 |
| Bance Global Teknic Limited | Mining & quarrying | 2024 |
| Banda Sportswear Limited | Manufacturing | 2015 |
| Bandenburg Sachs Limited | Health & social care | 2013 |
| Bang the Table (UK) PTY Ltd | Information & communication | 2012 |
| Bango 22 Limited | Information & communication | 2016 |
| Bango PLC | Information & communication | 2005 |
| Bango Resale Holdings Limited | Information & communication | 2020 |
| Bango Resale Limited | Information & communication | 2020 |
| Bango. NET Limited | Information & communication | 1999 |
| Bangonapps Limited | Information & communication | 2022 |
| Banks END Holdings Limited | Real estate | 2024 |
| Banktech Software Services Limited | Information & communication | 2006 |
| Banmo Education Group Ltd | Education | 2026 |
| Banner Maintenance Group Ltd | Manufacturing | 2026 |
| Bannerchoice Cockfield Limited | Construction | 2024 |
| Bannerchoice Developments Limited | Construction | 1973 |
| Bannerchoice Finance Ltd | Professional & scientific | 2019 |
| Bannerchoice Investments Limited | Real estate | 1985 |
| Bannold Supplies and Services Limited | Wholesale & retail | 1998 |
| Banquo Logistics and Services Limited | Transport & logistics | 2025 |
| Banyan Consultants Limited | Professional & scientific | 2014 |
| BAO Ning Plant Nutrition (UK) Ltd | Mining & quarrying | 2026 |
| Baobo International Trading Limited | Extraterritorial | 2023 |
| Baochem Industries Limited | Extraterritorial | 2011 |
| Baodel Electric System Co., Ltd | Extraterritorial | 2021 |
| Baofang Business Ltd | Manufacturing | 2023 |
| Baoji Group Limited | Manufacturing | 2024 |
| Bar Hill Motors Limited | Wholesale & retail | 2016 |
| Bar OH Limited | Hospitality | 2021 |
| Barak Lettings Limited | Real estate | 2022 |
| Barakah Performance Ltd | Wholesale & retail | 2025 |
| Barakat Global Limited | Extraterritorial | 2017 |
| Barbara Stogden Music Foundation | Arts & recreation | 2013 |
| Barbaros Yachting Ltd | Other services | 2026 |
| Barber Group Limited | Other services | 2019 |
| Barberlink Ltd | Information & communication | 2025 |
| Barbotta Ltd | Professional & scientific | 2019 |
| Barbu Sandrei Ltd | Manufacturing | 2024 |
| Bard Pharmaceuticals Limited | Manufacturing | 1970 |
| Bardhi & Sons Pristine Autos Ltd | Wholesale & retail | 2024 |
| Bare and Bloom Ltd | Manufacturing | 2021 |
| Barham & Moore Solutions Ltd | Information & communication | 2024 |
| Barham Stocks Ltd | Financial services | 2025 |
| Barista Verde Limited | Manufacturing | 2020 |
| Barker Bros Butchers Ltd. | Wholesale & retail | 2011 |