| Bowers & Bowers Holdings Limited | Financial services | 2024 |
| Box 123 Ltd | Other services | 2022 |
| Boxfour Limited | Construction | 2003 |
| Boyes Properties Ltd | Real estate | 2015 |
| BP24 Digital Media Limited | Extraterritorial | 2018 |
| BPI Auctions Ltd. | Wholesale & retail | 2010 |
| BR Tyre & Auto Services Ltd. | Wholesale & retail | 2015 |
| Bradford Brothers (Leeds) Ltd | Real estate | 2023 |
| Bradford Lofts Limited | Real estate | 2019 |
| Bradford Lofts Management Company Limited | Households | 2021 |
| Bradford Propco Limited | Real estate | 2009 |
| Bradshaw Plumbing and GAS Services Ltd | Construction | 2025 |
| Brahma Automotive Ltd | Wholesale & retail | 2018 |
| Brain Health Ltd | Health & social care | 2013 |
| Brainfood Publishing Ltd | Information & communication | 2022 |
| Brakesense Ltd | Manufacturing | 2025 |
| Brammers Training and Consultancy Limited | Education | 2015 |
| Branch Hyperbaric Ltd | Health & social care | 2024 |
| Branches Bereavement Support Community Interest Company | Health & social care | 2025 |
| Branded Clearance Sportswear Ltd | Wholesale & retail | 2004 |
| Brandeston Management Limited | Real estate | 2000 |
| Brandshipper Limited | Wholesale & retail | 2019 |
| Brandsome Digital & Design Limited | Professional & scientific | 2021 |
| Brandthing Ltd | Professional & scientific | 2007 |
| Brannon Holdings Limited | Real estate | 2025 |
| Branston Surveying Limited | Professional & scientific | 2020 |
| Brava Education Ltd | Administrative & support | 2025 |
| Braveshire Limited | Manufacturing | 1982 |
| Brazuka International Foods Ltd | Wholesale & retail | 2017 |
| Break - Fast (Wakefield) Limited | Hospitality | 2017 |
| Breakthrough MH Limited | Professional & scientific | 2014 |
| Breathing Space HR Limited | Administrative & support | 2006 |
| Bregus Investments, LP | | 2009 |
| Brets Property Limited | Real estate | 2024 |
| Brew Partners Ltd | Construction | 2020 |
| Brewed Coffee Co East Ardsley Limited | Hospitality | 2025 |
| Brewhouse Consultants Limited | Professional & scientific | 2016 |
| Briarwood Holdings Limited | Financial services | 2019 |
| Bricksxpert Limited | Real estate | 2018 |
| Bridge Facenet Limited | Professional & scientific | 2009 |
| Bridge Town Canteen Ltd | Hospitality | 2019 |
| Bridge Town PIE Co. Ltd | Hospitality | 2023 |
| Bridging the GAP 2 Limited | Professional & scientific | 2009 |
| Brier Consultancy Services Ltd | Professional & scientific | 2020 |
| Brigantes Healthcare Limited | Extraterritorial | 2016 |
| Briggs' Bakes Ltd | Wholesale & retail | 2024 |
| Bright & Precious Cleaning Services Ltd | Administrative & support | 2026 |
| Bright EYE Games Limited | Manufacturing | 2021 |
| Bright Removals Ltd | Transport & logistics | 2025 |
| Brighter Steps Living Limited | Health & social care | 2025 |
| Brighthawk Consulting Limited | Professional & scientific | 2025 |
| Brightstone Group Ltd | Professional & scientific | 2026 |
| Brillo Ltd | Information & communication | 2023 |
| Brindle Books Ltd | Information & communication | 2021 |
| Bring ME to Life- Women's Wellness CIC | Other services | 2021 |
| Britalian Ltd | Hospitality | 2023 |
| Britannia Observation Wheels Limited | Administrative & support | 1997 |
| Britannia Preservation Limited | Construction | 2011 |
| British Jeffrey Diamond Limited | Extraterritorial | 2024 |
| Britlex Motors UK Limited | Wholesale & retail | 2024 |
| Britology Ltd | Education | 2011 |
| Britwheelsuk Ltd | Wholesale & retail | 2025 |
| BRM Textile Ltd | Wholesale & retail | 2022 |
| Broadswift Limited | Other services | 1976 |
| Brocol Holdings Limited | Financial services | 2025 |
| Brocol Mechanical Services Limited | Manufacturing | 2001 |
| Brocol Nitrogen Limited | Manufacturing | 2021 |
| Brodie and Flynn Limited | Hospitality | 2021 |
| Broken Buttons Ltd | Information & communication | 2019 |
| Broken-Bonesboutique Ltd | Administrative & support | 2017 |
| Brook Brothers (Yorkshire) Limited | Water & waste | 2019 |
| Brook Lodge Management (Wakefield) Limited | Real estate | 2007 |
| Brooke Property Developments Limited | Real estate | 1987 |
| Brooke Race Exhausts Ltd. | Manufacturing | 2016 |
| Brookehouselettings Ltd | Real estate | 2025 |
| Brookes Property Management Limited | Real estate | 2020 |
| Brookhouse Wakefield Ltd | Hospitality | 2023 |
| Brooklands Motor Centres Limited | Professional & scientific | 2011 |
| Brooklyn Desserts Limited | Wholesale & retail | 2023 |
| Brooklyn Smash Burgers Limited | Hospitality | 2024 |
| Brooklyn Transport Ltd | Transport & logistics | 2026 |
| Brookroyd Enterprises Limited | Real estate | 2024 |
| Broom Fleet & Vehicle Solutions Ltd | Transport & logistics | 2026 |
| Brothers New Lodge Ltd | Wholesale & retail | 2025 |
| Brotherton Esseco Limited | Manufacturing | 2011 |
| Brotox Yorkshire Ltd | Health & social care | 2023 |
| Browns Decorators Limited | Other services | 2001 |
| Browns Plastering Ltd | Construction | 2020 |
| Brue Ltd | Information & communication | 2025 |
| Brunswick Russell Limited | Real estate | 2025 |
| Brunsworth Ltd | Wholesale & retail | 2022 |
| Bryson Wilde Chemicals Ltd | Wholesale & retail | 2021 |
| BSB Systems Consulting Ltd | Information & communication | 2019 |
| BSL Displays Ltd | Construction | 2008 |
| Bsoft Technologies Ltd | Information & communication | 2015 |
| BSR Property Services Ltd | Real estate | 2021 |
| Bssk Oberflaechentechnik - Innovative Bauerhaltung Ltd | Administrative & support | 2010 |
| Btll Properties Limited | Real estate | 2025 |
| BTS Lettings Limited | Real estate | 2023 |
| Bubble & Blow Ltd | Manufacturing | 2019 |