| Beautonic Aesthetics Limited | Health & social care | 2021 |
| Beauty Cocktail Spa Ltd | Other services | 2015 |
| Beauty Within Mehndi Ltd | Other services | 2023 |
| Beauty's Hidden GEM Limited | Other services | 2018 |
| Becc Renovations Limited | Construction | 1982 |
| Becflow Parcels Transport Ltd | Transport & logistics | 2025 |
| Becker Finance & Accounting Limited | Professional & scientific | 2018 |
| Beckett's Brook Holding Limited | Financial services | 2020 |
| Becketts Car Storage Ltd | Wholesale & retail | 2025 |
| Beckwith Services Ltd | Information & communication | 2008 |
| Beckworth BTS Limited | Administrative & support | 2013 |
| Becky’S Lashes Ltd | Other services | 2021 |
| Bedford Engraving Limited | Manufacturing | 2000 |
| Bedggood Ltd | Real estate | 2026 |
| BEE Cosmetics Ltd | Manufacturing | 2015 |
| Beech Burr Ltd | Manufacturing | 2022 |
| Beeches Homes Limited | Real estate | 2007 |
| Beechwood Consulting Services (UK) Ltd | Professional & scientific | 2011 |
| Beedingwood (Woodgate) Management Company Limited | Construction | 2016 |
| Beedingwood Residents Limited | Professional & scientific | 1992 |
| Beehive Properties (Sussex) Ltd | Real estate | 2022 |
| Beer 18 Ltd | Financial services | 2023 |
| Beest Creative Ltd | Professional & scientific | 2018 |
| Beevee Limited | Information & communication | 2014 |
| Beflattered.Com Limited | Wholesale & retail | 2009 |
| Being Cloud Group Ltd | Information & communication | 2019 |
| BEK Asset Consultants Limited | Real estate | 2025 |
| Belfi Limited | Professional & scientific | 2024 |
| Belimed Limited | Manufacturing | 2004 |
| Belinos Consulting Limited | Professional & scientific | 2006 |
| Bell-Bird Marketing Ltd | Professional & scientific | 2025 |
| Bella Pro (UK) Ltd | Wholesale & retail | 2016 |
| Bella Rose Equestrian Ltd | Wholesale & retail | 2018 |
| Belladu Limited | Wholesale & retail | 2023 |
| Belle Zora Ltd | Information & communication | 2024 |
| Bellenden Road Developments Limited | Construction | 2018 |
| Beltours Limited | Professional & scientific | 2014 |
| Belvedere Smith Properties (Key Site) LLP | | 2002 |
| BEN Aldrich Tree Services Ltd | Administrative & support | 2026 |
| BEN Allen Garden Services Ltd | Administrative & support | 2015 |
| BEN Baxter Construction Ltd | Construction | 2022 |
| BEN Carter Locations Limited | Information & communication | 2012 |
| BEN Cluer Ltd | Professional & scientific | 2007 |
| BEN Simpson Furniture Ltd | Manufacturing | 2018 |
| Benaco Edutech Ltd | Information & communication | 2025 |
| Benalpin Limited | Professional & scientific | 2000 |
| Benches & Beans Cafe Ltd | Hospitality | 2021 |
| Benchmark Capital Limited | Financial services | 2015 |
| Benchmark Financial Planning Limited | Financial services | 2011 |
| Benchmarq Limited | Information & communication | 2005 |
| Bennett Electrical (West Sussex) Ltd | Other services | 2020 |
| Bennett Partnership LLP | | 2010 |
| Bennetts Bar & Hospitality Ltd | Hospitality | 2024 |
| Benny BOY Properties Limited | Real estate | 2002 |
| Bentomol Limited | Professional & scientific | 2002 |
| Berkeley Associates Ltd | Professional & scientific | 2016 |
| Beron Estates Limited | Real estate | 1959 |
| Berwick Commercial Property Limited | Real estate | 2025 |
| Berwicks of Horsham Limited | Wholesale & retail | 2017 |
| Bespoke Business Solutions Ltd | Professional & scientific | 2022 |
| Bespoke Coaching Facilitation and Training Limited | Administrative & support | 2008 |
| Bespoke Drinks Media Limited | Professional & scientific | 2010 |
| Bespoke Management and Maintenance Ltd | Households | 2023 |
| Bespoke UK Services Limited | Transport & logistics | 2026 |
| Best Coffee Technologies Limited | Information & communication | 2017 |
| Best Model Toys Limited | Administrative & support | 2023 |
| Best New Life Limited | Health & social care | 2025 |
| Best Options Traders Limited | Wholesale & retail | 2024 |
| Best Practice IFA Group Limited | Financial services | 2002 |
| Bethany Mary Bridal Ltd | Wholesale & retail | 2025 |
| Betina Skovsted Ltd | Professional & scientific | 2018 |
| Betsen Limited | Information & communication | 2013 |
| Bevtec Beverages Limited | Wholesale & retail | 2024 |
| Bevtec Services International Limited | Hospitality | 2016 |
| Bevtec Services Limited | Wholesale & retail | 2011 |
| Bewbush Sports & Community CIC | Arts & recreation | 2025 |
| Beyond Beauty Crawley Ltd | Other services | 2022 |
| Beyond Hair & Beauty Ltd | Other services | 2019 |
| Beyond HR Consultancy Limited | Professional & scientific | 2010 |
| Beyond the Door Limited | Construction | 2025 |
| BG Select Limited | Hospitality | 2025 |
| BGC Environmental Consulting Ltd | Transport & logistics | 2019 |
| Bhlte Limited | Construction | 2025 |
| Bibble Purchasing Limited | Hospitality | 2024 |
| Bien-Air U K Limited | Wholesale & retail | 1983 |
| Big Blue Travel Limited | Administrative & support | 2018 |
| Big Boned Ltd | Wholesale & retail | 2023 |
| Big Book Media Limited | Other services | 1990 |
| Big Cheese Badges Limited | Manufacturing | 2005 |
| Big GUN Graphics Ltd | Arts & recreation | 2015 |
| Big Picture Consulting Ltd. | Professional & scientific | 2015 |
| Big Sister London Limited | Administrative & support | 2018 |
| Bigstep Cloud Limited | Information & communication | 2014 |
| Bika Ltd | Professional & scientific | 2023 |
| Bilbets (Horsham) Managements Limited | Households | 1990 |
| Billingshurst Osteopaths Limited | Health & social care | 2010 |
| Billys Operators Ltd | Wholesale & retail | 2018 |
| Bim-Arc Limited | Professional & scientific | 2024 |
| Binary Planet IT Solutions Limited | Information & communication | 2014 |
| BIO Clean Systems Limited | Financial services | 2018 |