| Balti International Limited | Hospitality | 2015 |
| Baltic Timber Imports Ltd | Wholesale & retail | 2026 |
| BAM BAM Creatives Ltd | Information & communication | 2019 |
| BAM Trading Ltd | Administrative & support | 2016 |
| Bambuuu Community Interest Company | Health & social care | 2020 |
| Bamfords Auctioneers and Valuers Limited | Other services | 2002 |
| Bampton Communications Limited | Professional & scientific | 2006 |
| Banbury Chase Management Company Limited | Households | 2018 |
| Bangar Properties Limited | Real estate | 2023 |
| Bangkok Street Food Ltd | Hospitality | 2018 |
| Banikhlan Ltd | Wholesale & retail | 2024 |
| Bank Security Printing Limited | Hospitality | 1985 |
| Banner Management Associates Limited | Professional & scientific | 2020 |
| Bansal Investments Ltd | Financial services | 2021 |
| Bansal Property Ltd | Real estate | 2021 |
| Bansals Plumbing and Heating Ltd | Construction | 2021 |
| Banwait Holdings Limited | Real estate | 2025 |
| Banwait Trading Ltd | Wholesale & retail | 2023 |
| Banyan Enterprises Limited | Other services | 2025 |
| Baps Kitchen Ltd | Hospitality | 2025 |
| Bar 56 Derby Ltd | Hospitality | 2019 |
| Bar Egos Limited | Hospitality | 2020 |
| Baran Cars Limited | Wholesale & retail | 2021 |
| Baran Motors Ltd | Wholesale & retail | 2025 |
| Barclay Stewart Property Limited | Construction | 2025 |
| Barcode Promotions Ltd | Information & communication | 2017 |
| Bardon Retail Limited | Real estate | 2025 |
| Bareeraa Enterprises Ltd | Wholesale & retail | 2026 |
| Barefoot Coaching EBT Trustee Limited | Professional & scientific | 2023 |
| Barefoot Coaching Holdings Limited | Financial services | 2023 |
| Barefoot Coaching Limited | Professional & scientific | 2009 |
| Barehurst Estates Limited | Professional & scientific | 2007 |
| Barevape Ltd | Wholesale & retail | 2025 |
| Bargain Fabrics Castle Donington Limited | Wholesale & retail | 2023 |
| Bargain Pound Plus Limited | Wholesale & retail | 2024 |
| Bargainarena Limited | Information & communication | 2003 |
| Barge Building Consultants Ltd | Construction | 2018 |
| Barge Estates Limited | Real estate | 2023 |
| Bark and Bathe Ltd | Other services | 2025 |
| Barkers Lettings Ltd | Real estate | 2023 |
| Barlborough Links Golf and Leisure Limited | Arts & recreation | 2016 |
| Barley Green Residents Management Company Limited | Households | 2014 |
| Barleyfields Ltd | Arts & recreation | 2019 |
| Barleyfields Riding School Ltd | Arts & recreation | 2019 |
| Barleythorpe Limited | Real estate | 2011 |
| Barlife Limited | Hospitality | 2018 |
| Barling Advisers Limited | Information & communication | 2019 |
| Barlows Flooring Limited | Wholesale & retail | 2012 |
| Barn Farm Dog Services Limited | Agriculture & fishing | 2023 |
| Barnett Surveyors Ltd | Professional & scientific | 2023 |
| Barney Precast Limited | Extraterritorial | 1989 |
| Barnkids Limited | Health & social care | 2003 |
| Barranco’S Coffee, Champagne & Co Limited | Manufacturing | 2025 |
| Barrie Green Limited | Professional & scientific | 2015 |
| Barron Mccann Holdings Limited | Financial services | 2013 |
| Barron Mccann Limited | Information & communication | 1972 |
| Barron Pest & Environmental Solutions Limited | Administrative & support | 2024 |
| Barrowash Catering Ltd | Hospitality | 2017 |
| Barsar NH Property Limited | Real estate | 2026 |
| Bart Couriers Ltd | Transport & logistics | 2022 |
| Barton Plant Hire & Contractors Limited | Construction | 2005 |
| BAS Partners Ltd | Wholesale & retail | 2016 |
| Base Construct Limited | Construction | 2025 |
| Basi Holdings Ltd | Real estate | 2025 |
| Basic Movement CIC | Education | 2025 |
| Basilisk Consulting Ltd | Professional & scientific | 2026 |
| Basilo Limited | Hospitality | 2019 |
| Basireddy Medical Ltd | Health & social care | 2017 |
| Baskerville Investments Limited | Real estate | 2019 |
| Baskerville Properties Ltd | Real estate | 2006 |
| Basketball AID Limited | Education | 2026 |
| Bass Construction (Midlands) Limited | Construction | 2023 |
| Bass Melody UK Limited | Wholesale & retail | 2025 |
| Bass Removals Ltd | Transport & logistics | 2015 |
| Bassford Building Ltd | Construction | 2025 |
| Bassi Beauty Limited | Other services | 2025 |
| Bastian Brown Publishing Ltd | Information & communication | 2022 |
| Bastin Holmes Limited | Real estate | 2024 |
| Basuta International Limited | Construction | 1991 |
| Basuta Ophthalmic Services Limited | Health & social care | 2009 |
| Batchelor Engineering Ltd | Manufacturing | 2026 |
| Batecool Refrigeration Limited | Construction | 1998 |
| Bates Housing Limited | Wholesale & retail | 2020 |
| Bates Weston Audit Limited | Professional & scientific | 1991 |
| Bates Weston Corporate Finance LLP | | 2015 |
| Bates Weston Corporate Trustee Limited | Extraterritorial | 2017 |
| Bates Weston Holdings Limited | Professional & scientific | 2022 |
| Bates Weston LLP | | 2011 |
| Bates Weston Probate LLP | | 2019 |
| Bates Weston Tax Advisory Limited | Professional & scientific | 2017 |
| Bates Weston Tax LLP | | 2015 |
| Bath Street Launderette Limited | Other services | 2013 |
| Batimo Ltd | Construction | 2017 |
| Batteries Retail Ltd | Wholesale & retail | 2024 |
| Battersea Foods Limited | Hospitality | 2018 |
| Baxendale Properties Ltd | Real estate | 2019 |
| Baxter and Hill Ltd | Health & social care | 2016 |
| Bay Farm Foods Ltd | Extraterritorial | 2020 |
| Bay Lane Limited | Real estate | 2021 |
| Bay Leaf FF Limited | Hospitality | 2022 |