| Bankwood Kennels and Cattery Limited | Extraterritorial | 2018 |
| Banv Aesthetics Ltd | Health & social care | 2016 |
| Barbara Mucha Ltd | Professional & scientific | 2026 |
| Bare Beauty Yorkshire Ltd | Other services | 2025 |
| Barends Limited | Professional & scientific | 2003 |
| Bargain Brothers Ltd | Wholesale & retail | 2020 |
| Barkers Installation Ltd | Manufacturing | 2026 |
| Barkers Pontefract Ltd | Manufacturing | 2026 |
| Barlie Estates Ltd | Real estate | 2021 |
| Barlow Whale Ltd | Real estate | 2025 |
| Barncroft Engineering Limited | Manufacturing | 2010 |
| Barnsdale Leisure Limited | Wholesale & retail | 2013 |
| Barracks Inns Limited | Hospitality | 2010 |
| Barreg Group Limited | Financial services | 2026 |
| Barrington Property Investment Limited | Real estate | 2018 |
| Barrys Poultry Handling Limited | Agriculture & fishing | 2025 |
| Bartley Tavern Ltd | Hospitality | 2020 |
| Base Supplements Ltd | Wholesale & retail | 2019 |
| Bash Base Ltd | Arts & recreation | 2025 |
| Baxter Interiors Ltd | Construction | 2022 |
| BBQ Ltd | Hospitality | 2025 |
| BC Steam Engineers Ltd | Manufacturing | 2016 |
| Bcnuk Ltd | Administrative & support | 2016 |
| BCW Car Sales Ltd | Wholesale & retail | 2019 |
| BD Coatings Ltd | Construction | 2022 |
| BDK Automotion Ltd | Wholesale & retail | 2021 |
| Beaumont Grange (Warrington) Management Company Limited | Households | 2012 |
| Beauty@Urbanescape Ltd | Other services | 2016 |
| Because Conveyancing Matters Ltd | Professional & scientific | 2023 |
| BEE Tasara Ltd | Real estate | 2025 |
| Behappi Limited | Professional & scientific | 2012 |
| Bekfabs Limited | Manufacturing | 2021 |
| Believe Accounting Limited | Professional & scientific | 2021 |
| Believe Recruitment Limited | Administrative & support | 2019 |
| Bell Lane Garage Limited | Wholesale & retail | 2014 |
| Bellamy Building Co. Limited | Construction | 2003 |
| Belle VIE Bridal Ltd | Wholesale & retail | 2026 |
| Belz Property Ltd | Real estate | 2022 |
| Bems Manager Ltd | Professional & scientific | 2025 |
| Benchmark Realty Solutions Ltd | Real estate | 2024 |
| Bennze Auto Tech Ltd | Health & social care | 2025 |
| Benova Healthcare UK Ltd | Wholesale & retail | 2019 |
| Bentomic Consulting Ltd | Information & communication | 2025 |
| Berk Cafe Ltd | Hospitality | 2025 |
| Berriman Carpets Limited | Wholesale & retail | 2017 |
| Bespoke Growth Solutions Ltd | Professional & scientific | 2024 |
| Best Dogs Security Ltd | Administrative & support | 2020 |
| Best Dogs Security West Ltd | Administrative & support | 2021 |
| Best of Media Ltd | Professional & scientific | 2022 |
| Beta Club Limited | Hospitality | 2025 |
| Better & Bright Ltd | Hospitality | 2015 |
| Better Home Investments Ltd | Real estate | 2026 |
| Beyond Healing Ltd | Health & social care | 2019 |
| BG & a Developments Ltd | Real estate | 2022 |
| BG Haulage UK Ltd | Transport & logistics | 2018 |
| BG Smalls Limited | Professional & scientific | 2019 |
| BHD Haulage Ltd | Transport & logistics | 2022 |
| BHD Interiors Ltd | Other services | 2023 |
| Bhutan Authentic Flavours Ltd | Wholesale & retail | 2024 |
| Bibendum Limited | Wholesale & retail | 2025 |
| Big Size Ltd. | Transport & logistics | 2024 |
| Birdsall Farms Limited | Agriculture & fishing | 1997 |
| BJ Raffles Ltd | Arts & recreation | 2024 |
| BJR Transport Limited | Transport & logistics | 2019 |
| BK Consultancy Ltd | Professional & scientific | 2025 |
| BK Yorkshire Limited | Construction | 2023 |
| Bkmr Legal Services Ltd | Administrative & support | 2019 |
| Black Label Tattoo Academy Limited | Other services | 2025 |
| Black Sheep Wellbeing Ltd | Health & social care | 2025 |
| Blackwell Haulage Ltd | Other services | 2020 |
| Bladetech Limited | Manufacturing | 2022 |
| Blakely Safety Solutions Ltd | Professional & scientific | 2017 |
| Blank Street Properties Ltd | Real estate | 2025 |
| Blex Retail Ltd | Wholesale & retail | 2026 |
| Blitz Rigging Limited | Administrative & support | 2022 |
| Blossom Modular MMC C.I.C. | Construction | 2022 |
| Blossom Street Limited | Wholesale & retail | 2026 |
| Blue Bell Properties (Pontefract) Ltd | Construction | 2016 |
| Blue Lagoon Estates Ltd | Financial services | 2019 |
| Blue Talent Limited | Administrative & support | 2017 |
| BM Travel Limited | Transport & logistics | 2014 |
| BN Transport Ltd | Transport & logistics | 2021 |
| BNL Solutions Limited | Professional & scientific | 2012 |
| Boardtek Limited | Manufacturing | 2007 |
| Bob's Burgers & Shakes Ltd | Hospitality | 2021 |
| Body Smart Aesthetics Ltd | Health & social care | 2014 |
| Boomit Ltd | Information & communication | 2025 |
| Boothtown Brewery Co Ltd | Manufacturing | 2016 |
| BORN2DRIFT Ltd | Wholesale & retail | 2021 |
| Boutite Ltd | Wholesale & retail | 2025 |
| Bowerman Contracts Limited | Administrative & support | 2012 |
| Bowkirk Joinery Solutions Ltd | Construction | 2013 |
| Bowkirk Properties Limited | Households | 2018 |
| Box Greener Ltd | Professional & scientific | 2023 |
| Boycott 1967 Limited | Extraterritorial | 2015 |
| Bp&S Manchester Limited | Administrative & support | 2017 |
| BPS Project Consulting Limited | Administrative & support | 2014 |
| BPS Property & Development Holdings Ltd | Financial services | 2026 |
| Brackenhill Sport Horses Ltd | Agriculture & fishing | 2020 |
| Bradleys Real Estate Limited | Real estate | 2021 |