| B3AVIS Limited | Construction | 2015 |
| BA & S Limited | Other services | 2013 |
| Back to Fitness Sports Therapy Limited | Arts & recreation | 2022 |
| BAD HAT Media Ltd | Information & communication | 2012 |
| Bahman Store Limited | Wholesale & retail | 2024 |
| Bala Healthcare Limited | Health & social care | 2015 |
| Baldwin Bennett Ltd | Real estate | 2020 |
| Balla Enterprise Ltd | Other services | 2016 |
| Ballykelly Construction Limited | Construction | 2023 |
| Ballykelly Consulting Ltd | Professional & scientific | 2018 |
| Barbers of East Street Limited | Other services | 2004 |
| Barclays House Management Ltd | Households | 2026 |
| Barnett Enterprises Limited | Administrative & support | 2021 |
| Baron Management Services Ltd | Professional & scientific | 2023 |
| Barrington Black Consultants Limited | Professional & scientific | 2009 |
| Barrington Black Limited | Real estate | 1998 |
| Baserace Limited | Real estate | 2005 |
| Baska Restaurant Ltd | Hospitality | 2025 |
| Basset Rescue Network GB | Other services | 2014 |
| Batelli Surgical Ltd | Health & social care | 2023 |
| Bayley and Lord Limited | Hospitality | 2018 |
| BBM Accounting Limited | Professional & scientific | 2025 |
| BCP Advisors Ltd | Professional & scientific | 2024 |
| BDH Consulting Ltd | Administrative & support | 2024 |
| Beaulieu Property Limited | Real estate | 2020 |
| Beautiful Lawns Limited | Agriculture & fishing | 2010 |
| Beauty Trading Link Ltd | Wholesale & retail | 2026 |
| Bedside Manor House Care Ltd | Health & social care | 2024 |
| BEE Innovation Limited | Administrative & support | 2021 |
| Beech Farm Land Limited | Households | 2006 |
| Beech Wood (Caterham) Residents Association Limited | Households | 1965 |
| Beechwood Grove Ltd | Real estate | 2025 |
| Beechwood Residential Trust Limited | Households | 1978 |
| Beerhog Ltd | Information & communication | 2016 |
| Behavioural Works Ltd | Professional & scientific | 2017 |
| Bellatti & Co Limited | Other services | 2016 |
| Belvedere Studios Ltd | Information & communication | 2024 |
| BEN Dale Gardening Services Limited | Administrative & support | 2021 |
| Benga Data Intelligence Ltd | Information & communication | 2016 |
| Benison Associates Limited | Professional & scientific | 2007 |
| Benison Services Ltd | Administrative & support | 2023 |
| Benjamin Chocolatier Ltd | Extraterritorial | 2019 |
| Bennett Investment Properties Ltd | Real estate | 2020 |
| Bentley Drive Management Company Limited | Households | 2008 |
| BEP (Surrey) Limited | Construction | 2026 |
| Berry Landscapes Ltd | Administrative & support | 2017 |
| Bespoke MDF Designs Limited | Construction | 2018 |
| Bespoke Refurbishments (S.E.) Ltd | Construction | 2018 |
| Bessward Developments Ltd | Real estate | 2021 |
| Best Foods Mega Mart Limited | Wholesale & retail | 2019 |
| Best Gourmet Limited | Wholesale & retail | 2017 |
| Best Wind UK 1 Limited | Energy | 2015 |
| Bestfood Supermarket Crawley Limited | Wholesale & retail | 2025 |
| Better Living Housing Limited | Health & social care | 2008 |
| BG Sales Consultancy Services Ltd | Professional & scientific | 2022 |
| BGJ Property Ltd | Real estate | 2021 |
| Bias Development Ltd | Information & communication | 2010 |
| Big & Small Aggregates Ltd | Construction | 2023 |
| Big & Small Construction Limited | Construction | 2025 |
| Billy&Michael Scaffolding Services Ltd | Construction | 2016 |
| Binderton Consulting Limited | Professional & scientific | 2018 |
| Binfield Superstore Ltd | Wholesale & retail | 2026 |
| Birchcroft Park Residents Association (Chaldon) Limited | Other services | 1989 |
| Birchwold Homes Ltd | Construction | 2023 |
| Birdking Recruitment Services Ltd | Administrative & support | 2023 |
| Birdstone Software Ltd | Information & communication | 2023 |
| Birdwin Properties Limited | Professional & scientific | 2002 |
| Birkett Lets Limited | Real estate | 2017 |
| Bisley GUN Club ( Down the Line ) Ltd. | Extraterritorial | 2013 |
| Bisley GUN Club ( DTL ) Ltd. | Extraterritorial | 2013 |
| Bisley GUN Club (1923) Ltd. | Extraterritorial | 2013 |
| Bisley GUN Club (CTS) Ltd | Extraterritorial | 2013 |
| Bisley GUN Club Ltd. | Extraterritorial | 2013 |
| Blakebarrett Consultancy Ltd | Professional & scientific | 2023 |
| Blaze Guard Ltd | Public administration | 2025 |
| Blendell Painting & Decorating Limited | Construction | 2019 |
| BLG Media Limited | Information & communication | 2017 |
| Blinds & Window Films Limited | Wholesale & retail | 2018 |
| Blossoms Godstone Ltd | Hospitality | 2022 |
| Bloxham Property Ventures Ltd | Real estate | 2020 |
| Blue London Electrical Solutions Ltd | Construction | 2026 |
| Blueboard Training and Consultancy Ltd | Other services | 2019 |
| Blushrooms Digital Ltd | Other services | 2025 |
| BMC Roofing Ltd | Construction | 2018 |
| Boasenda (UK) Ltd | Professional & scientific | 2025 |
| Body Heat Gym Ltd | Arts & recreation | 2018 |
| Body Praise Ltd | Other services | 2018 |
| Bonwycks London Ltd | Water & waste | 2024 |
| Booker Venue Ltd | Administrative & support | 2018 |
| Born Purple Ltd | Information & communication | 2019 |
| Borrowdale Brook Developments Ltd | Construction | 2022 |
| Borrowdale Brook Properties Ltd | Real estate | 2017 |
| Bosky Muse Ltd | Real estate | 2024 |
| Boulton Analytics Associates Limited | Professional & scientific | 2010 |
| Bourne Tax Ltd | Professional & scientific | 2010 |
| Box'D Shipping Limited | Wholesale & retail | 2020 |
| BPG Events Ltd | Arts & recreation | 2023 |
| BR Freight Solutions Ltd | Transport & logistics | 2024 |
| Bragg Investments (Tooting) Limited | Real estate | 1958 |
| Branded Uniform and Business Print Ltd | Administrative & support | 2023 |