| BB Events and Media Solutions Ltd | Information & communication | 2025 |
| BB Wines & Spirits Ltd | Wholesale & retail | 2024 |
| BB Wines Ltd | Wholesale & retail | 2022 |
| BBA Consulting Ltd | Professional & scientific | 2001 |
| BBB Investment Holdings Limited | Financial services | 2018 |
| BBB Investment Services Limited | Financial services | 2024 |
| BBB Mandates Limited | Financial services | 2025 |
| BBE International Limited | Professional & scientific | 2015 |
| BBF Coaching Ltd | Education | 2026 |
| BBF Fitness Ltd | Education | 2025 |
| BBI Finance Limited | Financial services | 1995 |
| BBL Surplus Limited | Wholesale & retail | 2016 |
| BBM (Materials) Limited | Extraterritorial | 1932 |
| BBS (Eden Grove) Limited | Wholesale & retail | 1967 |
| BBS Customs Ltd | Wholesale & retail | 2026 |
| Bbss Trade Limited | Wholesale & retail | 2024 |
| Bb`S Italian Restaurant Limited | Hospitality | 2008 |
| BC Care and Repair Services Ltd | Public administration | 2020 |
| BC Dunn Management Ltd | Administrative & support | 2025 |
| BC Lincolnshire Ltd | Health & social care | 2025 |
| BC Properties Trading Ltd | Real estate | 2023 |
| BC RTM Company Limited | Households | 2021 |
| BC Sheffield Ltd | Health & social care | 2009 |
| BCC Management Consultants Limited | Professional & scientific | 2010 |
| BCD Care Limited | Construction | 2010 |
| BCD Holdings Limited | Health & social care | 2007 |
| BCEM1 Ltd | Professional & scientific | 2016 |
| BCH Savage Agri Ltd | Agriculture & fishing | 2026 |
| BCK Fire Ltd | Administrative & support | 2025 |
| Bckt Ltd | Information & communication | 2015 |
| BCM Property Maintenance Ltd | Construction | 2021 |
| BCS Removals Ltd | Transport & logistics | 2023 |
| BCS Solutions Limited | Extraterritorial | 2016 |
| BCV Corporation Ltd | Wholesale & retail | 2024 |
| BD Express Limited | Construction | 2024 |
| BD Printing Ltd | Manufacturing | 2025 |
| BD TUT Limited | Transport & logistics | 2020 |
| BDB Design Build Holdings Limited | Professional & scientific | 2015 |
| BDB Design Build Limited | Construction | 1994 |
| BDB EOT Trustee Limited | Professional & scientific | 2024 |
| BDD Developments Limited | Construction | 2012 |
| BDI Furniture Ltd | Wholesale & retail | 2014 |
| BDK Heating & GAS Services Ltd | Construction | 2023 |
| Bdrmm Ltd | Information & communication | 2022 |
| BDS C.A.D. Services | | 1995 |
| BDS Joinery Leeds Ltd | Manufacturing | 2018 |
| BDT Property Holdings Ltd | Real estate | 2025 |
| BE Just Productions Ltd | Administrative & support | 2022 |
| BE More Mary Limited | Professional & scientific | 2023 |
| BE More Media Ltd | Information & communication | 2019 |
| BE Retail Ready Limited | Wholesale & retail | 2025 |
| BE Social East Mids Ltd | Professional & scientific | 2025 |
| BE Supported Ltd | Health & social care | 2022 |
| BEA Global Limited | Professional & scientific | 2023 |
| BEA London Ltd | Professional & scientific | 2013 |
| Bea's Babies Limited | Professional & scientific | 2020 |
| Beach Lime Ltd | Health & social care | 2011 |
| Beaconwise Ltd | Wholesale & retail | 2025 |
| Beakertron Ltd | Information & communication | 2023 |
| Bealby and Jones Limited | Health & social care | 2020 |
| Beals Blinds Limited | Manufacturing | 2014 |
| Beame Properties Ltd | Construction | 2025 |
| Beamreach Holdings Ltd | Financial services | 2026 |
| Beamshape Holdings Limited | Financial services | 2024 |
| Beamshape Limited | Manufacturing | 1999 |
| Bean Blvd. Ltd | Hospitality | 2023 |
| Bean&Co Limited | Hospitality | 2026 |
| Bear & BOO Hospitality Ltd | Hospitality | 2025 |
| Bear and Babe Limited | Manufacturing | 2016 |
| Bear Concrete Ltd | Manufacturing | 2020 |
| Bear Energy Ltd | Other services | 2024 |
| Bear Necessities Supplies Limited | Wholesale & retail | 2024 |
| Bearbone Productions Limited | Information & communication | 2015 |
| Beardows Corner C.I.C. | Education | 2024 |
| Bearhugs Gifts Limited | Wholesale & retail | 2017 |
| Bearing Warehouse Limited | Wholesale & retail | 2000 |
| Beashem Asphalt Ltd | Construction | 2017 |
| Beasley & Purdy Ltd | Hospitality | 2019 |
| Beasley Properties Management & Lettings Ltd | Real estate | 2024 |
| Beast VFX Ltd | Information & communication | 2018 |
| Beat Box Digital Ltd | Information & communication | 2009 |
| BEAT2BEAT Cardiology Ltd | Health & social care | 2023 |
| Beatson Building Services Ltd | Construction | 2018 |
| Beatson Family Properties Limited | Real estate | 2024 |
| Beatson Limited | Information & communication | 2025 |
| Beatson Plumbing & Heating Ltd | Construction | 2025 |
| Beau Serenity Ltd | Health & social care | 2025 |
| Beauchief Building Solutions Ltd | Construction | 2020 |
| Beauchief Develop and Build Ltd | Construction | 2019 |
| Beauchief Estates Limited | Real estate | 2010 |
| Beauchief Manor Maintenance Limited | Households | 2003 |
| Beauchief Residential Management Limited | Households | 2018 |
| Beaumont Capital Investments Ltd | Real estate | 2026 |
| Beaumont Carpets Limited | Transport & logistics | 2004 |
| Beauties Aesthetics Ltd | Other services | 2025 |
| Beauty Beneath Hairdressing Ltd | Other services | 2021 |
| Beauty Beneath Salon Limited | Other services | 2025 |
| Beauty by Hayley Limited | Administrative & support | 2025 |
| Beauty Diamond Nails Ltd | Other services | 2025 |
| Beauty HQ Ltd | Other services | 2025 |