| Belle Vale Specsavers Limited | Wholesale & retail | 2009 |
| Belle Vale Visionplus Limited | Wholesale & retail | 2009 |
| Bells Auto Services Ropley Ltd. | Wholesale & retail | 2013 |
| Bellshill Specsavers Limited | Wholesale & retail | 2017 |
| Belpar Rubber Company Limited | Manufacturing | 1954 |
| Belper Specsavers Limited | Wholesale & retail | 2005 |
| Belper Visionplus Limited | Wholesale & retail | 2005 |
| Belvedere Farm Ltd | Real estate | 2023 |
| Bemarketable Limited | Professional & scientific | 2017 |
| Bemoreathlete Limited | Arts & recreation | 2020 |
| BEN Brazzo Hairdressing Limited | Other services | 2026 |
| BEN Weedon Research Ltd | Professional & scientific | 2017 |
| Bench Connect Limited | Information & communication | 2026 |
| Benchmark Safety Services Ltd | Information & communication | 2017 |
| Benchuk Ltd | Manufacturing | 2022 |
| Benedict's Place Residents Company Limited | Real estate | 2008 |
| Benjamin Fisher Limited | Health & social care | 2026 |
| Benlee Construction Limited | Construction | 1996 |
| Benn Lock and Safe Limited | Administrative & support | 2017 |
| Bennett (Opticians) Limited | Professional & scientific | 2012 |
| Benny & Co Hair Ltd | Other services | 2024 |
| Benosey Limited | Other services | 2011 |
| Benson Advisory Security International Limited | Professional & scientific | 2012 |
| Bentley CID Electrical Services Ltd | Construction | 2025 |
| Bere Forest Tree Services & Milling Ltd | Administrative & support | 2026 |
| Beresford Administration Services Limited | Professional & scientific | 2020 |
| Beresford Auto Service Centre Limited | Wholesale & retail | 2025 |
| Berinov Property Limited | Real estate | 2022 |
| Berkey Waterfilters Limited | Wholesale & retail | 2014 |
| Berkshire 1 Domiciliary Specsavers Limited | Wholesale & retail | 2014 |
| Berkshire Newmedica Limited | Health & social care | 2023 |
| Berwick Specsavers Limited | Wholesale & retail | 2005 |
| Berwick Visionplus Limited | Wholesale & retail | 2005 |
| Berwick-Upon-Tweed Specsavers Hearcare Limited | Wholesale & retail | 2020 |
| Bespoke Beauty by Deborah Ltd | Other services | 2019 |
| Bespoke Music Tuition Limited | Education | 2023 |
| Bespoke Wealth Limited | Financial services | 2019 |
| Beta Electrical Services Ltd | Construction | 2016 |
| Beth Gibbons Physiotherapy Limited | Health & social care | 2016 |
| Bethnal Green Specsavers Limited | Wholesale & retail | 2004 |
| Bethnal Green Visionplus Limited | Wholesale & retail | 2004 |
| Beulah Lodge Ltd | Real estate | 2020 |
| Beverley Specsavers Limited | Wholesale & retail | 1999 |
| Beverley Visionplus Limited | Wholesale & retail | 1999 |
| Bev’S Bar Limited | Hospitality | 2019 |
| Bexhill Specsavers Limited | Wholesale & retail | 2002 |
| Bexleyheath Specsavers Hearcare Limited | Wholesale & retail | 2006 |
| Bexleyheath Specsavers Limited | Wholesale & retail | 1994 |
| Bexleyheath Visionplus Limited | Wholesale & retail | 1994 |
| Beyk Ltd | Manufacturing | 2026 |
| Beyond 90 Football Agency Ltd | Professional & scientific | 2026 |
| Beyond C Ltd | Professional & scientific | 2014 |
| Beyond Encryption Ltd | Information & communication | 2013 |
| Beyond the Castle Limited | Construction | 2017 |
| BG Solent Properties Limited | Real estate | 2024 |
| BGP Transport Ltd | Transport & logistics | 2025 |
| BH Industrial Building and Maintenance Ltd | Construction | 2017 |
| Bhavedi Ltd | Real estate | 2022 |
| Biarritz Consulting Group Ltd | Information & communication | 2021 |
| Bicester Specsavers Hearcare Limited | Wholesale & retail | 2019 |
| Bicester Specsavers Limited | Wholesale & retail | 1996 |
| Biciri Ltd | Information & communication | 2025 |
| Bideford Specsavers Limited | Wholesale & retail | 2005 |
| Bideford Visionplus Limited | Wholesale & retail | 2005 |
| Big Chip Limited | Wholesale & retail | 2007 |
| Big Hill Associates Ltd | Professional & scientific | 2019 |
| Biggleswade Bells Brook Specsavers Limited | Wholesale & retail | 2018 |
| Biggleswade Specsavers Hearcare Limited | Wholesale & retail | 2024 |
| Biggleswade Specsavers Limited | Wholesale & retail | 2010 |
| Biggs Wealth Management Limited | Real estate | 2018 |
| Bike Republic Limited | Wholesale & retail | 1998 |
| Biker Parts Direct Limited | Wholesale & retail | 2005 |
| Bikers Care Approved Limited | Other services | 2018 |
| Bilet Ltd | Real estate | 2022 |
| Bilkhu Projects Limited | Health & social care | 2018 |
| Bill & Freds Ltd | Wholesale & retail | 2026 |
| Billericay Specsavers Limited | Wholesale & retail | 2005 |
| Billericay Visionplus Limited | Wholesale & retail | 2005 |
| Bilston Specsavers Limited | Wholesale & retail | 2005 |
| Bilston Visionplus Limited | Wholesale & retail | 2005 |
| BIMINI4BOATS Ltd | Manufacturing | 2019 |
| Bingham Specsavers Limited | Wholesale & retail | 2016 |
| Bingley Specsavers Limited | Wholesale & retail | 2022 |
| BIO Diverse Management Ltd | Financial services | 2023 |
| BIO Dose Limited | Manufacturing | 2020 |
| Biomechanics Education Ltd | Health & social care | 2013 |
| BIP III Project GJ AIV (I) L.P. | | 2022 |
| BIP III Project GJ AIV (II) L.P. | | 2022 |
| BIP V Co-Investment a L.P. | | 2026 |
| Birchwood Investment Management Limited | Financial services | 1984 |
| Bird of Paradise Enterprises Limited | Education | 2017 |
| Birdysnbogeys Ltd | Wholesale & retail | 2025 |
| Birdytravellight Ltd | Administrative & support | 2025 |
| Birkenhead Specsavers Hearcare Limited | Wholesale & retail | 2005 |
| Birmingham 1 Domiciliary Specsavers Limited | Wholesale & retail | 2013 |
| Birmingham 2 Domiciliary Specsavers Limited | Wholesale & retail | 2014 |
| Birmingham Domi Audiology Specsavers Limited | Wholesale & retail | 2023 |
| Birmingham Newmedica Limited | Health & social care | 2022 |
| Bishop Auckland Specsavers Hearcare Limited | Wholesale & retail | 2005 |
| Bishop Auckland Specsavers Limited | Wholesale & retail | 1995 |