| Beechwood House Estate Limited | Agriculture & fishing | 2023 |
| Beechworth Residents Company Limited | Households | 2011 |
| Beef and Burgundy Limited | Wholesale & retail | 2009 |
| Beenroute Limited | Hospitality | 1987 |
| Beerflow Ltd | Wholesale & retail | 2025 |
| Beesured Ltd | Construction | 2020 |
| Befi Limited | Construction | 2009 |
| Begreat Services Ltd | Administrative & support | 2018 |
| Belgravia Partners Consulting Limited | Professional & scientific | 2020 |
| Believeintalking Limited | Health & social care | 2023 |
| Beliyf Limited | Professional & scientific | 2013 |
| Bell and Blake Limited | Real estate | 2013 |
| Bellis Limited | Arts & recreation | 2024 |
| Belmont Yachts Ltd | Wholesale & retail | 2026 |
| Beluga Spas Limited | Wholesale & retail | 2024 |
| Belvest Limited | Administrative & support | 1997 |
| BEN Hunt Media Ltd | Information & communication | 2023 |
| BEN Sieber Limited | Professional & scientific | 2026 |
| BEN Williams IP Limited | Professional & scientific | 2014 |
| Benchmark Construction Ltd | Construction | 2023 |
| Benedict’S Management Company Limited | Real estate | 2015 |
| Bennett & Game Recruitment Limited | Administrative & support | 2012 |
| Bennett and Game Recruitment (Building Services) Limited | Administrative & support | 2019 |
| Benny 4X4 Ltd | Transport & logistics | 2020 |
| Berkeley Court Management Company (Littlehampton) Limited | Households | 1975 |
| Berkshire Housebuilders Limited | Construction | 1976 |
| Bernard Limited | Professional & scientific | 1996 |
| Berry Financial Solutions Ltd | Professional & scientific | 2018 |
| Berry Stonework Limited | Construction | 2015 |
| Bersted Restaurant Ltd | Hospitality | 2025 |
| Besmoke Holdings Limited | Financial services | 2017 |
| Besmoke Limited | Hospitality | 2007 |
| Bespokability Limited | Professional & scientific | 2026 |
| Bespoke Living Construction Limited | Construction | 2017 |
| Bespoke Projects West Sussex Ltd | Construction | 2024 |
| Bespoke Software Forge Limited | Information & communication | 2025 |
| Best Garden Design Ltd | Professional & scientific | 2024 |
| Best Property Services and Management Ltd | Construction | 2020 |
| Bestlog Ltd | Transport & logistics | 2001 |
| Bethcorp Ltd. | Professional & scientific | 2022 |
| Betterdot Ltd | Information & communication | 2024 |
| Between Inn Ltd | Professional & scientific | 2024 |
| Betwixt Limited | Manufacturing | 2017 |
| Beverley Court (Worthing) Limited | Households | 2002 |
| Beverly House (Westminster) Limited | Households | 1987 |
| Bevtec Communications Limited | Information & communication | 1987 |
| Beyouboo Ltd | Wholesale & retail | 2018 |
| BFA Holdings Limited | Wholesale & retail | 2006 |
| BFS Services Ltd | Administrative & support | 2015 |
| BG Doodles Holdings Limited | Extraterritorial | 2012 |
| BGL Wealth Limited | Financial services | 2012 |
| BGL Williams Ltd | Arts & recreation | 2023 |
| BGR Construction Ltd | Construction | 2023 |
| BH GAS Services Ltd | Construction | 2023 |
| BHL Investments (Chichester) Limited | Real estate | 2016 |
| BHL Properties Limited | Real estate | 2016 |
| BHT Tenerife Limited | Real estate | 2019 |
| BI Smith Design Ltd | Construction | 2018 |
| Biblia Bookkeeping Ltd | Professional & scientific | 2025 |
| Bibove Ltd | Manufacturing | 2020 |
| Bibs & Pips Ltd | Construction | 2019 |
| BID Masters Ltd | Professional & scientific | 1995 |
| BID Profession Initiative Ltd | Other services | 2022 |
| Bidegrove Limited | Construction | 1982 |
| Big BAD Wolf Distribution Ltd | Extraterritorial | 2016 |
| Big Bird Aviation Ltd | Professional & scientific | 2021 |
| Big Brands Group Ltd | Financial services | 2024 |
| Big Brands U.K. Ltd | Other services | 2022 |
| Big Dog Events Limited | Arts & recreation | 2025 |
| Big Leap Limited | Information & communication | 2012 |
| Big Picture Mastery Productions Ltd | Information & communication | 2024 |
| Big Red EYE Ltd | Information & communication | 2010 |
| Big Red Toolbox Holdings Ltd | Financial services | 2025 |
| Bikes and Boots Ltd | Wholesale & retail | 2019 |
| Billingwood Limited | Real estate | 2023 |
| Binkybonk Limited | Financial services | 2021 |
| BIO Cleansing Services UK Ltd | Administrative & support | 2026 |
| Bioaccess Group Limited | Financial services | 2024 |
| Bioaccess Holdings Limited | Financial services | 2019 |
| Bioaccess Sales Limited | Manufacturing | 2019 |
| Bioactive Pharma Ltd | Manufacturing | 2020 |
| Biocoat-Protect Limited | Construction | 2025 |
| Biodot Limited | Professional & scientific | 1989 |
| Biojem Limited | Professional & scientific | 2019 |
| Birdham Animal Feeds Ltd | Wholesale & retail | 2014 |
| Birdham Church Field Limited | Real estate | 2013 |
| Birdham Homes Ltd | Construction | 2022 |
| Birdham Stores Limited | Wholesale & retail | 2004 |
| Birdham Upper Pool Limited | Professional & scientific | 2020 |
| Birdham Yacht Club Limited | Arts & recreation | 2023 |
| Birkdale Associates Limited | Professional & scientific | 2000 |
| Bishop Luffa Learning Partnership | Education | 2013 |
| Bishop Otter Properties Limited | Real estate | 2024 |
| Bishops Botanicals Ltd | Administrative & support | 2025 |
| Bison Events Limited | Administrative & support | 2024 |
| Bitcoin NRG Ltd | Other services | 2024 |
| BJL Enterprise Ltd | Hospitality | 2021 |
| BL Solar 11 (Mundham) Limited | Energy | 2024 |
| BL Solar 12 (Helios Energy Park) Limited | Energy | 2024 |
| Black and White Web Development Ltd | Information & communication | 2024 |