| Bexhill Senior Citizens Club | Health & social care | 2024 |
| Bexhill Spice Limited | Hospitality | 2024 |
| Bexhill Storage Solutions Limited | Transport & logistics | 2015 |
| Bexhill Sunny Ltd | Wholesale & retail | 2025 |
| Bexhill Taxis Ltd | Transport & logistics | 2025 |
| Bexhill Trade & Commerce CIC | Administrative & support | 2026 |
| Bexhill Van Sales T/A Central Car Sales Ltd | Wholesale & retail | 2012 |
| Bexhill Vape Co. Ltd | Wholesale & retail | 2017 |
| Bexhill Wild Domesday CIC | Professional & scientific | 2023 |
| Bexley Court Management Company Limited | Households | 1973 |
| Bexwar Flats Limited | Households | 1961 |
| Beyond Brilliant Events Ltd | Arts & recreation | 2008 |
| Biddesden Ltd | Health & social care | 2018 |
| Big FAT Group Ltd | Energy | 2021 |
| Bill Bowden Event Logistics Limited | Transport & logistics | 2014 |
| Birkdale Flats Limited | Other services | 1989 |
| Birkdale Nursery Ltd | Education | 2011 |
| Bitmovin UK Limited | Information & communication | 2017 |
| BJS Engineering Ltd | Professional & scientific | 2022 |
| Black Attic Kitchenette Ltd | Hospitality | 2024 |
| Black Pearl Tattoo Limited | Professional & scientific | 2008 |
| Black Watch Tartan Films Ltd | Information & communication | 2020 |
| Blacklands Fire Limited | Public administration | 2015 |
| Blackwells Design & Build Ltd | Construction | 2015 |
| Blooming Sentimental Ltd | Wholesale & retail | 2024 |
| Blossom Through Play Ltd | Education | 2026 |
| Blue Duchy Limited | Wholesale & retail | 2020 |
| Blue Moon Vapes Limited | Wholesale & retail | 2024 |
| Blue Pool Properties Ltd | Real estate | 2023 |
| Blue Response Ltd | Professional & scientific | 2013 |
| Blueprint Mortgages & Protection Ltd | Financial services | 2022 |
| Blukonzept Group Limited | Financial services | 2024 |
| Blusii Ltd | Wholesale & retail | 2017 |
| Bmva Limited | Other services | 2025 |
| Bodiam Meat Company Limited | Wholesale & retail | 1986 |
| BOL Soul Ltd | Arts & recreation | 2015 |
| Bold Developments Ltd | Construction | 2021 |
| Bold Property Group Ltd | Real estate | 2019 |
| Bolebrooke Gardens Residents Association Limited | Households | 1988 |
| Bolt Bikes Limited | Transport & logistics | 2014 |
| Bonjour Trading Limited | Hospitality | 2019 |
| Boomhauer & Associates Ltd | Professional & scientific | 2024 |
| Boricuacats Ltd | Education | 2017 |
| Bowland Fell Park Limited | Hospitality | 2011 |
| BP Carpentry and Construction Ltd | Construction | 2026 |
| BPC Therapeutics Limited | Other services | 2017 |
| BPM Holdings (Sussex) Limited | Financial services | 2026 |
| BPM Lets Limited | Construction | 2024 |
| BPM Property Claims Management Limited | Construction | 2018 |
| BPN Property Ltd | Real estate | 2025 |
| Brand Crucible Limited | Professional & scientific | 2009 |
| Brand Foundry Design Consultants Limited | Professional & scientific | 2016 |
| Brede Valley Farm Ltd | Real estate | 2020 |
| Brian Duncan Plumbing & Heating Ltd | Construction | 2015 |
| Brian Knott Consulting Ltd | Information & communication | 2026 |
| Brick Well Homes Limited | Real estate | 2025 |
| Bricktop Holdings Ltd | Real estate | 2024 |
| Brickwork Property Investments Ltd | Real estate | 2021 |
| Bridge and Tunnel Project Ltd | Wholesale & retail | 2026 |
| Bridge Leisure Bidco Limited | Professional & scientific | 2014 |
| Bridge Leisure Finco Limited | Professional & scientific | 2014 |
| Bridge Leisure Management (North) Limited | Hospitality | 2011 |
| Bridge Leisure Management Limited | Professional & scientific | 2008 |
| Bridge Leisure Midco Limited | Professional & scientific | 2014 |
| Bridge Leisure Parks (Finance) Limited | Hospitality | 2009 |
| Bridge Leisure Parks (Holdings) Limited | Hospitality | 2009 |
| Bridge Leisure Parks Limited | Hospitality | 2009 |
| Bridge Leisure Topco Limited | Professional & scientific | 2014 |
| Bright & Beautiful Gardens Sussex Ltd | Administrative & support | 2014 |
| Bright Films Ltd | Information & communication | 2020 |
| Brighter Future for Owners RTM Company Limited | Households | 2019 |
| Brighter Homes Property Development Limited | Real estate | 2024 |
| Brightpath Neuro Ltd | Health & social care | 2025 |
| Bristow Management Ltd | Real estate | 2026 |
| Britannia Enterprise Centre Limited | Real estate | 1995 |
| Broadwater House Ltd | Real estate | 2022 |
| Brockhurst Gate (Bexhill) Management Limited | Other services | 1992 |
| Brockhurst Gate RTM Company Limited | Other services | 2007 |
| Brody Holdings Limited | Real estate | 2017 |
| Brogt Holding Limited | Professional & scientific | 2008 |
| Brooks Access Maintenance Limited | Construction | 2013 |
| Brooksby Mews Management Company Limited | Households | 2013 |
| Brown Stone Management Solutions Ltd | Professional & scientific | 2014 |
| Browns Property Development Limited | Construction | 2013 |
| Broxbourne Developments Limited | Real estate | 1964 |
| Bruce Developments Limited | Real estate | 2022 |
| Bryterard Limited | Households | 1964 |
| BS Building & Construction Limited | Construction | 2021 |
| Bubble 'N Sweets Ltd | Hospitality | 2022 |
| Buckholt Investments Limited | Other services | 2006 |
| Build Wise AI Ltd | Information & communication | 2025 |
| Build Your Adventure Ltd | Wholesale & retail | 2026 |
| Buildatrix Limited | Construction | 2024 |
| Burnham Beach Shack Limited | Wholesale & retail | 2026 |
| Burton ST Leonards Limited | Real estate | 2023 |
| Burtons' ST Leonards Society Limited (the) | Other services | 1970 |
| Bushycroft Properties Limited | Real estate | 2022 |
| Butler Michael Limited | Wholesale & retail | 2020 |
| Buttercup Environmental Ltd | Financial services | 2025 |
| Buzspoke Limited | Wholesale & retail | 2010 |