| Best Buy Retail Limited | Wholesale & retail | 2017 |
| Best Buy Supermarket Ltd | Wholesale & retail | 2021 |
| Best Buyerz Ltd | Wholesale & retail | 2025 |
| Best Chops Leicester Ltd | Hospitality | 2025 |
| Best City Rooms Ltd | Real estate | 2017 |
| Best Clean Solutions Limited | Administrative & support | 2026 |
| Best Cosmetics Limited | Wholesale & retail | 2019 |
| Best Deal Care Limited | Health & social care | 2014 |
| Best Deal Shipping Ltd | Transport & logistics | 2022 |
| Best Deal Trading Ltd | Wholesale & retail | 2023 |
| Best for Less Nappies Limited | Wholesale & retail | 2006 |
| Best Glass and Glazing Limited | Manufacturing | 2023 |
| Best Language Services Limited | Professional & scientific | 2024 |
| Best Pizza Point Ltd | Hospitality | 2025 |
| Best Price Bathroom (Leicester) Limited | Wholesale & retail | 2010 |
| Best Professional Cleaning Services Ltd | Administrative & support | 2025 |
| Best Staff for YOU Ltd | Administrative & support | 2025 |
| Best Trend Interiors Limited | Wholesale & retail | 2016 |
| Best Vape Brands Ltd | Wholesale & retail | 2018 |
| Best West Bridgford Home Care Ltd | Health & social care | 2021 |
| BESTBARBER2772 Ltd | Other services | 2026 |
| Bestbarberr Ltd | Other services | 2026 |
| Bestbarberrr Ltd | Other services | 2026 |
| Bestbase Investments Limited | Real estate | 2001 |
| Bestbusy Limited | Construction | 1986 |
| Bestcare Ltd | Health & social care | 2004 |
| Bestdealsuk Limited | Wholesale & retail | 2026 |
| Bestvalue Properties Limited | Real estate | 2020 |
| Bestway Management Ltd. | Health & social care | 2019 |
| Betahydria Limited | Wholesale & retail | 2025 |
| Betahydrio Limited | Hospitality | 2022 |
| Betelgeuse Artificial Intelligence (AI) Research Centre Limited | Information & communication | 2017 |
| Bethel Healthcare Ltd | Health & social care | 2024 |
| Bethel MED Ltd | Health & social care | 2024 |
| Bethel Portfolio Management Ltd | Real estate | 2023 |
| Betim Hand Car Wash Ltd | Other services | 2018 |
| Betsley Limited | Health & social care | 2021 |
| Betta-Fit Auto Centre Limited | Wholesale & retail | 2003 |
| Bettagrade Limited | Hospitality | 1997 |
| Better Deal Furniture Ltd | Wholesale & retail | 2025 |
| Better Future Training Ltd | Extraterritorial | 2020 |
| Better Mark Ltd | Wholesale & retail | 2025 |
| Better Together Resource Management Limited | Administrative & support | 2016 |
| Betterplate Ltd | Other services | 2026 |
| Bettiscombe Choice Ltd | Transport & logistics | 2014 |
| Bettles Accountancy Limited | Professional & scientific | 2020 |
| Betts Heating Limited | Construction | 2015 |
| Betty and the Beauties Ltd | Other services | 2025 |
| Betty Bay Design Limited | Wholesale & retail | 2012 |
| Bevans Building Contracts Limited | Manufacturing | 2015 |
| Bevingtons & Sons Limited | Financial services | 1949 |
| Bevingtons Holdings Limited | Financial services | 2016 |
| Bevstar Distribution Limited | Wholesale & retail | 2020 |
| Bexfield Supreme Ltd | Transport & logistics | 2014 |
| Beygrove Limited | Real estate | 1987 |
| Beyond Analytics Ltd | Information & communication | 2022 |
| Beyond Code Ltd | Education | 2026 |
| Beyond Flavours Ltd | Hospitality | 2026 |
| Beyond Limits Learning and Wellbeing Limited | Education | 2025 |
| Beyond Neuroequity Ltd | Professional & scientific | 2025 |
| Beyond Smiles Ltd | Health & social care | 2021 |
| Beyond Stays Group Limited | Real estate | 2024 |
| Beyond Stays Mgmt Limited | Real estate | 2025 |
| Beyond the Beats Limited | Administrative & support | 2025 |
| Beyond the Stars Sapcote Limited | Health & social care | 2024 |
| Beyourcomfort Ltd | Wholesale & retail | 2023 |
| Bez's Autos Ltd | Wholesale & retail | 2019 |
| Bezendi Limited | Hospitality | 2015 |
| BF Pro Coaching Ltd | Education | 2025 |
| Bfdc Ltd | Administrative & support | 2009 |
| BFG Coaching Limited | Education | 2015 |
| BFG Employment Ltd | Administrative & support | 2020 |
| BFG Enterprises Limited | Professional & scientific | 2016 |
| BFG People Ltd | Professional & scientific | 2023 |
| BFG Studies Limited | Education | 2020 |
| Bfgdj Limited | Arts & recreation | 2017 |
| Bflion Ltd | Administrative & support | 2025 |
| BFP UK Services Limited | Health & social care | 2016 |
| BFS Transport Ltd | Transport & logistics | 2024 |
| Bfsl Construction Ltd | Construction | 2020 |
| Bfsl Developments Ltd | Construction | 2025 |
| BFT Leicester Limited | Arts & recreation | 2022 |
| BG Clothing Ltd | Manufacturing | 2022 |
| BGD5 Ltd | Health & social care | 2020 |
| BGH Timber Limited | Manufacturing | 2001 |
| Bgii Energy Ltd | Professional & scientific | 2023 |
| Bgii Ltd | Professional & scientific | 2020 |
| Bgii Origination Ltd | Professional & scientific | 2022 |
| BGK Couriers Limited | Transport & logistics | 2016 |
| BGM Proclean Ltd | Administrative & support | 2025 |
| Bgno Properties Ltd | Real estate | 2026 |
| Bgnr Development Ltd | Construction | 2006 |
| Bgnr Land Development Limited | Real estate | 2007 |
| BGS Accounting Limited | Professional & scientific | 2018 |
| BGS Accounting R&D Ltd | Professional & scientific | 2020 |
| BGV Distribution Limited | Wholesale & retail | 2024 |
| BH Building Contractor Ltd | Construction | 2009 |
| BH Business Consultancy Ltd | Professional & scientific | 2025 |
| BH Estate Holdings Limited | Real estate | 2022 |
| BH Khelifa Ltd | Construction | 2020 |