| Beach HUT Auctions Limited | Real estate | 2025 |
| Beach Land Estates Ltd | Construction | 2017 |
| Beach Without Sand Ltd | Extraterritorial | 2024 |
| Beachbox Shoreham Limited | Extraterritorial | 2018 |
| Beachcafeserviceswitterings Ltd | Hospitality | 2025 |
| Beachcomber Leisure Limited | Hospitality | 2019 |
| Beachkarma Limited | Hospitality | 2022 |
| Beacon Business Services (Holdings) Limited | Financial services | 2017 |
| Beacon Business Services (UK) Limited | Professional & scientific | 2012 |
| Beacon Health Services Ltd | Professional & scientific | 2025 |
| Beacon Property Services (Midlands) Limited | Construction | 2017 |
| Beagle PUB Co Ltd | Hospitality | 2014 |
| Bean Building Solutions Ltd | Construction | 2014 |
| Bean There Done That Ltd | Hospitality | 2025 |
| Beast Ltd | Information & communication | 2024 |
| Beat Switch Music Services Ltd | Professional & scientific | 2025 |
| Beatrice and MAE Homes LLP | | 2021 |
| Beatsix Media Ltd | Information & communication | 2025 |
| Beau Bailey Bespoke Ltd | Construction | 2022 |
| Beaumont Fish Bar Limited | Hospitality | 2019 |
| Beautiful Nails (Littlehampton) Ltd | Other services | 2025 |
| Beautify Limited | Other services | 2006 |
| Beautile Showroom Ltd | Wholesale & retail | 2024 |
| Beauty LA Belle Ltd | Other services | 2021 |
| Becket Court Tenants Association Limited | Households | 1961 |
| Beckworth Close Lindfield Limited | Households | 2003 |
| Become - Fitness Ltd | Other services | 2025 |
| BED and Breakfast Association Ltd | Other services | 2009 |
| Beddoes Products Limited | Manufacturing | 2016 |
| Bedfordwell Court Limited | Households | 1958 |
| Bedrock Geoservices Limited | Professional & scientific | 2023 |
| Bedson Boilers Ltd | Construction | 2016 |
| BEE Cleen Education Limited | Administrative & support | 2022 |
| BEE Cleen Limited | Administrative & support | 2018 |
| BEE Cleen Southern Ltd | Administrative & support | 2007 |
| BEE Engineering Ltd | Manufacturing | 2022 |
| BEE Line Travel Limited | Transport & logistics | 2002 |
| Bee's Wing Limited | Information & communication | 2010 |
| Beech Gardens Management Company Limited | Households | 1982 |
| Beech Gardens Worthing Limited | Professional & scientific | 2013 |
| Beeches Services Ltd | Administrative & support | 2017 |
| Beechtree Estate Management Ltd | Real estate | 2021 |
| Beechwood Landscaping Ltd | Administrative & support | 2019 |
| Beehive Aviation Medicals Ltd | Health & social care | 2020 |
| Beehive Care Group | Health & social care | 2021 |
| Beercraft Brewery Limited | Manufacturing | 2015 |
| Beercraft Holdings Ltd | Financial services | 2025 |
| Beerus Limited | Information & communication | 2019 |
| Beetlemania Ltd | Wholesale & retail | 2022 |
| Bega Brighton Limited | Real estate | 2024 |
| BEK Wholesale Ltd | Wholesale & retail | 2003 |
| Beku Development Limited | Construction | 2022 |
| Beleza Brighton LLP | | 2014 |
| Bell (Gardens) Limited | Administrative & support | 1957 |
| Bell House Management Company (Pulborough) Limited | Households | 2026 |
| Bell-Air Developments Management Limited | Households | 2000 |
| Bella Bathrooms of Sussex Ltd | Construction | 2024 |
| Bellby Properties Ltd | Real estate | 2024 |
| Belles Marketing Limited | Professional & scientific | 2026 |
| Bellissimo Bathrooms Ltd | Construction | 2012 |
| Beluna Private PA Services Ltd | Administrative & support | 2023 |
| Bemusement Arcade Ltd | Arts & recreation | 2019 |
| BEN Milton Associates Limited | Information & communication | 2007 |
| BEN20 Enterprise Limited | Real estate | 2013 |
| Benchmark Animal Health Group Limited | Professional & scientific | 2010 |
| Benchmark Animal Health Limited | Professional & scientific | 2014 |
| Benchmark Genetics Limited | Professional & scientific | 2014 |
| Benchmark Holdings Limited | Professional & scientific | 2000 |
| Benchmast Limited | Extraterritorial | 1998 |
| Benedict Black Limited | Information & communication | 2021 |
| Bengo Health Ltd | Health & social care | 2026 |
| Benitoite JV LLP | | 2022 |
| Benjamin Court (Christchurch) Management Company Limited | Households | 2010 |
| Benjamin Court Freehold Limited | Real estate | 2008 |
| Benjamin Dubois Consulting Ltd | Information & communication | 2025 |
| Bennett Griffin LLP | | 2010 |
| Bennett Highways & Infrastructure Services Ltd | Construction | 2019 |
| Bentalls Plumbing and Heating Ltd | Construction | 2020 |
| Benton Group Limited | Real estate | 1970 |
| Benton Weatherstone Limited | Wholesale & retail | 1993 |
| Benyon Ltd | Real estate | 2023 |
| Beokay World Ltd | Wholesale & retail | 2025 |
| BER Engineering Composites Limited | Administrative & support | 2009 |
| Berfin 7 Ltd | Hospitality | 2025 |
| Berlinetta Classic Car Auctions Ltd | Wholesale & retail | 2015 |
| Berry House BED & Breakfast Limited | Hospitality | 2018 |
| Berry TT Holdings Limited | Financial services | 2025 |
| Bespoke Dental Care Limited | Health & social care | 2022 |
| Bespoke Glass & Double Glazing Limited | Construction | 2013 |
| Best Barker Limited | Information & communication | 2026 |
| Best Freelance Design Ltd | Information & communication | 2015 |
| Best Life Care Limited | Health & social care | 2014 |
| Bestatdigital Holdings Limited | Financial services | 2020 |
| Bestatdigital Ltd | Information & communication | 2020 |
| Beth Mayes Consulting Ltd | Professional & scientific | 2023 |
| Betsworth Building Solutions Limited | Construction | 2020 |
| Better Risk Ltd | Other services | 2010 |
| Better Strategic Consultancy Ltd | Professional & scientific | 2024 |
| Between the Blue and Green CIC | Arts & recreation | 2024 |
| Bewise Driving Ltd | Other services | 2014 |