| Balkan Unity Live Ltd | Wholesale & retail | 2025 |
| Baltic Global Trading Ltd | Wholesale & retail | 2025 |
| Bamboura Ltd | Wholesale & retail | 2025 |
| Bambspark Limited | Wholesale & retail | 2024 |
| Bameerd Trade Ltd | Wholesale & retail | 2026 |
| Bana FX Consultantcy Ltd | Information & communication | 2025 |
| Banafshe Limited | Wholesale & retail | 2025 |
| Bandale Limited | Wholesale & retail | 2008 |
| Bandorafa Ltd | Wholesale & retail | 2025 |
| Baneks UK Ltd | Information & communication | 2020 |
| Bangladeshi Ltd | Wholesale & retail | 2025 |
| Banjosa Lake Ltd | Wholesale & retail | 2024 |
| Banley Drive Management Company Limited | Households | 1999 |
| Bannor Industrial Co., Ltd | Extraterritorial | 2014 |
| BAO Tian Electronic Co., Ltd | Administrative & support | 2021 |
| Baoshuo Ltd | Wholesale & retail | 2024 |
| Bar Market Ltd | Wholesale & retail | 2024 |
| Baraldi.Club Ltd. | Wholesale & retail | 2019 |
| Barcarolle Ltd | Professional & scientific | 2024 |
| Bare Halal Ltd | Information & communication | 2026 |
| Barefoot Nutritional Therapy Ltd | Health & social care | 2024 |
| Bargainwaste Ltd | Water & waste | 2020 |
| Barge Walk Films Ltd | Information & communication | 2023 |
| Barn 74 Ltd | Transport & logistics | 2021 |
| Barns Overflow Ltd | Real estate | 2026 |
| Barnsmoke Pictures Ltd | Information & communication | 2024 |
| Baron Famain Limited | Real estate | 2016 |
| Baronial Business Bureau Ltd | Financial services | 2025 |
| Barony Good Product Co., Ltd | Extraterritorial | 2023 |
| Barony Hotels Worldwide Limited | Extraterritorial | 2002 |
| Barrett & Barrett Professional Services Ltd | Other services | 2006 |
| Barrington Legal Limited | Professional & scientific | 2024 |
| Barson Engineering Limited | Professional & scientific | 2011 |
| Barvio Limited | Financial services | 2025 |
| Base Property Moves Ltd | Real estate | 2025 |
| Bash Global Limited | Wholesale & retail | 2018 |
| Basit-Medical Limited | Health & social care | 2007 |
| Bassetown Limited | Wholesale & retail | 2021 |
| Bastionen Auktioner Ltd | Wholesale & retail | 2025 |
| Batach Limited | Health & social care | 2009 |
| Bathos AI Limited | Information & communication | 2025 |
| Battaservices Limited | Professional & scientific | 2025 |
| Baxifu (Netherlands) Int'L Agrochemistry Special Fertilizer Ltd | Extraterritorial | 2025 |
| Bay City Rollers Movie Ltd | Information & communication | 2018 |
| Bayesian Optimism Ltd | Professional & scientific | 2025 |
| Bayley & Green Ltd | Information & communication | 2011 |
| Bazil Bazos Limited | Wholesale & retail | 2026 |
| Bbucket Program C.I.C. | Education | 2025 |
| Bcamcnc Group Ltd | Extraterritorial | 2016 |
| Bcfigures Ltd | Wholesale & retail | 2025 |
| BD Solutionsltd Ltd | Manufacturing | 2026 |
| BE in IT to WIN IT Limited | Other services | 2025 |
| BE Inspired Consulting Limited | Professional & scientific | 2010 |
| BE More Recruitment Limited | Other services | 2020 |
| BE Partners Industrial Ltd | Administrative & support | 2026 |
| Beadribblr Ltd | Education | 2025 |
| Beam Trading Ltd | Wholesale & retail | 2025 |
| Beantiful Eioral Ltd | Wholesale & retail | 2024 |
| Bear XI Limited | Wholesale & retail | 2025 |
| Bearded Skull Ltd | Wholesale & retail | 2024 |
| Beargym Ltd | Other services | 2023 |
| Beast Studio Ltd | Wholesale & retail | 2025 |
| Beast Tapestry Limited | Manufacturing | 2024 |
| Beateno Franster Ltd | Wholesale & retail | 2025 |
| BEATZ4WEEKES Ltd | Information & communication | 2019 |
| Beau Sea Ltd | Wholesale & retail | 2026 |
| Beaudet Limited | Information & communication | 2007 |
| Beaumont Valear Ltd | Wholesale & retail | 2026 |
| Beautiful Home Lettings Limited | Real estate | 2010 |
| Beautifuly Ltd | Wholesale & retail | 2025 |
| Beauty & the Beast Publishing Ltd | Manufacturing | 2020 |
| Beauty and the Lease Ltd | Real estate | 2020 |
| Beauty DOT Academy Ltd | Wholesale & retail | 2020 |
| Beauty Makeup (UK) Limited | Wholesale & retail | 2023 |
| Beauty Perfection Limited | Other services | 2019 |
| Beautyfavor Ltd | Extraterritorial | 2025 |
| Beautyzens Ltd | Wholesale & retail | 2025 |
| Bebyana Ltd | Information & communication | 2025 |
| Becelly Ltd | Extraterritorial | 2025 |
| Beckley Consulting Ltd | Real estate | 2013 |
| Bedlow’S Group Limited | Manufacturing | 2025 |
| BEE Kind Training Ltd | Education | 2021 |
| Beerich Limited | Wholesale & retail | 2023 |
| Bees Organics Limited | Wholesale & retail | 2025 |
| Beeyourcharms Ltd | Manufacturing | 2024 |
| Beezy Global Ltd | Information & communication | 2025 |
| Begeisterung Ltd | Wholesale & retail | 2026 |
| Beggar Music Management Ltd | Information & communication | 2025 |
| Behind Bars PUB Co. Limited | Hospitality | 2003 |
| Behoric Ltd | Wholesale & retail | 2025 |
| Beiertrading Ltd | Wholesale & retail | 2025 |
| Beihai Jiehang Marine Service Co., Ltd | Administrative & support | 2020 |
| Being Developer Ltd | Information & communication | 2025 |
| Beinggo Limited | Wholesale & retail | 2025 |
| Beisheng Trading Ltd | Wholesale & retail | 2025 |
| Beishuo Trading Co., Ltd | Wholesale & retail | 2024 |
| Beiwang Trading Co., Ltd | Wholesale & retail | 2025 |
| Belaid's Co Ltd | Wholesale & retail | 2025 |
| Belapp Ltd | Information & communication | 2022 |
| Belbal (U.K.) Limited | Manufacturing | 1992 |