| Best of Asia Ltd | Manufacturing | 2025 |
| Best of Poland Ltd | Manufacturing | 2020 |
| Betty Bramble Ltd | Wholesale & retail | 2013 |
| Beventuresome Ltd | Information & communication | 2018 |
| Bezara Consultancy Limited | Professional & scientific | 2024 |
| BF Creative Ltd | Professional & scientific | 2014 |
| Big Print Plan Limited | Administrative & support | 2011 |
| Birchpoint Management Company Limited | Households | 1975 |
| Birds Hill Oxshott Estate Company Limited | Real estate | 1980 |
| Bishops Court Residents Company (Sunbury) Limited | Households | 1998 |
| Bitesize Computer Training Limited | Information & communication | 2011 |
| Bjpce Limited | Education | 2010 |
| BJR Golf Ltd | Wholesale & retail | 2015 |
| BJW Enterprises Limited | Real estate | 2010 |
| Bkonsulting Ltd | Professional & scientific | 2025 |
| BKP Property Developments Limited | Construction | 2015 |
| BKZ Business Solutions Ltd | Information & communication | 2019 |
| Black Card Competitions Limited | Arts & recreation | 2026 |
| Black Kifaru Records Ltd | Extraterritorial | 2009 |
| Black Level Television Limited | Information & communication | 2011 |
| Black Life Sciences Limited | Professional & scientific | 2016 |
| Black Sands Consultancy Ltd | Professional & scientific | 2021 |
| Blackforge Industrial Supplies Limited | Wholesale & retail | 2025 |
| Blackops Ltd | Professional & scientific | 2026 |
| Blakes of Bookham Event Services Limited | Wholesale & retail | 2021 |
| Blakes of Bookham Flowers Limited | Wholesale & retail | 2020 |
| Blboonlerts Limited | Real estate | 2026 |
| Bleckfield Limited | Information & communication | 2002 |
| Blenheim Court Management (Leatherhead) Limited | Administrative & support | 2007 |
| Blenheim Group Limited | Financial services | 2000 |
| Blissli Limited | Wholesale & retail | 2025 |
| Blondie & the Bears Limited | Other services | 2016 |
| Blue Amber Limited | Information & communication | 2011 |
| Blue Cedars (London) LLP | | 2023 |
| Blue Cedars Group Ltd | Construction | 2023 |
| Blue Light Locksmiths Ltd | Other services | 2026 |
| Blue Sky Systems Limited | Information & communication | 2014 |
| Bluebdigital Limited | Professional & scientific | 2022 |
| Bluebird Mews Management Company (1) Limited | Real estate | 2023 |
| BM Security Limited | Administrative & support | 2002 |
| BN Patel & Co Limited | Wholesale & retail | 2023 |
| BOB Martin Consultants Ltd | Financial services | 2013 |
| Bobbylush Carpentry Ltd | Manufacturing | 2026 |
| Bobo Kitchen Ltd | Hospitality | 2024 |
| Body & Soul Organic Foods Limited | Hospitality | 2008 |
| Body ARE Limited | Health & social care | 2026 |
| Bogo Limited | Wholesale & retail | 2017 |
| Bolters Management Company Limited | Households | 1982 |
| Boncasa Nydlsey Hall Ltd | Real estate | 2026 |
| Bonney Property Ltd | Hospitality | 2024 |
| Bonnie Dogs Ltd | Wholesale & retail | 2006 |
| Bonny 7 Project Management Company Limited | Professional & scientific | 2008 |
| Bonny BIN Limited | Manufacturing | 2023 |
| Bonsor Drive (Tadworth) Management Company Limited | Households | 2015 |
| Bookham Acmi Ltd | Transport & logistics | 2020 |
| Bookham Beauty Limited | Other services | 2021 |
| Bookham Bungalow Stores Limited | Wholesale & retail | 2009 |
| Bookham Charcoal Grill Ltd | Hospitality | 2019 |
| Bookham Colts Youth Football Club Limited | Arts & recreation | 2026 |
| Bookham Community Association | Health & social care | 2012 |
| Bookham Eats Limited | Health & social care | 2021 |
| Bookham Energy Services Ltd | Professional & scientific | 2011 |
| Bookham Fitted Wardrobes Ltd | Construction | 2025 |
| Bookham Grange Management Company Limited | Administrative & support | 1998 |
| Bookham Mini Mart Limited | Wholesale & retail | 2021 |
| Bookham Resources Limited | Professional & scientific | 2004 |
| Bookham Software Services Limited | Information & communication | 1995 |
| Bookham Tennis Club Limited | Arts & recreation | 2011 |
| Bookham UK Limited | Manufacturing | 1965 |
| Bookham Youth and Community Association Limited | Arts & recreation | 2008 |
| Bookkeeping & Beyond Ltd | Information & communication | 2010 |
| Boostford Limited | Professional & scientific | 2021 |
| Booth Mechanical Services Limited | Construction | 1989 |
| Booth Securities Limited | Professional & scientific | 2010 |
| Bosfin Limited | Financial services | 2018 |
| Both Worlds Limited | Professional & scientific | 2017 |
| Bound Brothers Limited | Professional & scientific | 2021 |
| Box and Betty Limited | Wholesale & retail | 2018 |
| Box Street Studios Ltd | Information & communication | 2019 |
| Boxgrove Gardens Management Company Limited | Households | 2009 |
| Boxhill Living Ltd | Construction | 2023 |
| Bppr Limited | Information & communication | 2026 |
| Brackenbrae Management Company Limited | Households | 2003 |
| Brackenwood Management RTM Company Limited | Households | 2019 |
| Braeblock Hill Consulting Ltd | Professional & scientific | 2015 |
| Braids by Teephar Ltd | Other services | 2025 |
| Brainchild Productions Limited | Information & communication | 2009 |
| Bramble and BEE Ltd | Hospitality | 2024 |
| Bramblewood Solutions Ltd | Professional & scientific | 2019 |
| Branded Talent Ltd | Arts & recreation | 2017 |
| Brandie Digital Ltd | Information & communication | 2026 |
| Brandpropertyventures Ltd | Real estate | 2024 |
| Brands United Limited | Professional & scientific | 2000 |
| Braver Minds Ltd | Professional & scientific | 2016 |
| Brett Davey Ltd | Arts & recreation | 2022 |
| Bridgehead Software Limited | Information & communication | 1994 |
| Bridgehead Systems Limited | Information & communication | 1999 |
| Bridj Ltd | Professional & scientific | 2025 |
| Briggs Principal Investments Ltd | Administrative & support | 2013 |
| Bright Futures Resourcing Limited | Extraterritorial | 2003 |