| Beesdepe Limited | Health & social care | 2007 |
| Beeswax Energy Ltd | Energy | 2020 |
| Behdad Properties Ltd | Real estate | 2024 |
| Beirutii Foods Ltd | Hospitality | 2025 |
| Bejami Limited | Health & social care | 2021 |
| Belfry Bats Ltd | Hospitality | 2023 |
| Believer Achiever Ltd | Wholesale & retail | 2020 |
| Belift Studio Limited | Arts & recreation | 2023 |
| Bell Mead Freehold Company Limited | Households | 2023 |
| Bellamy Gardens Management Company Ltd | Real estate | 2024 |
| Bellco LX Holdings Ltd | Real estate | 2020 |
| Belle Brummell Ltd | Wholesale & retail | 2019 |
| Bellegrove Dental Surgery Limited | Health & social care | 2024 |
| Bellimo Limited | Real estate | 2014 |
| Belmont Castle Care Limited | Health & social care | 2025 |
| Belvedere Ltd | Wholesale & retail | 2019 |
| Bemberton Ltd | Wholesale & retail | 2021 |
| BEN Butler Brickwork Limited | Construction | 2019 |
| BEN Butler Property Developments Limited | Real estate | 2024 |
| BEN Goodman Physio Ltd | Health & social care | 2026 |
| BEN MAK London Ltd | Manufacturing | 2009 |
| BEN MAX Limited | Real estate | 1999 |
| BEN Sharp Ltd | Construction | 2019 |
| BEN Tseliki Ltd | Real estate | 2022 |
| BEN Walker Ltd | Financial services | 2026 |
| Benchef Limited | Hospitality | 2018 |
| Benedict DU Boulay Research and Development Ltd | Education | 2021 |
| Benedict Luxmoore Limited | Professional & scientific | 2013 |
| Benefits Atelier Ltd | Professional & scientific | 2024 |
| Benez Group Limited | Manufacturing | 2017 |
| Benjamin Monsey Ltd | Professional & scientific | 2025 |
| Bennelong Limited | Professional & scientific | 2016 |
| Bennett Moore Limited | Administrative & support | 2018 |
| Bennett's Independent Trading Ltd | Financial services | 2025 |
| Bennu Services Ltd | Agriculture & fishing | 2018 |
| Bennyfit Ltd | Arts & recreation | 2021 |
| Bentham Solar Farm Limited | Energy | 2013 |
| Berkeley CT (Hove) RTM Company Limited | Real estate | 2025 |
| Berriedale House Limited | Households | 1989 |
| Berry & Co London Ltd | Hospitality | 2011 |
| Bersey Consulting Ltd | Professional & scientific | 2021 |
| Berthllwyd Solar Project Limited | Energy | 2014 |
| Besamalsore.Uk Ltd | Hospitality | 2023 |
| Best Financial Solutions Limited | Financial services | 2003 |
| Best Move Property UK Limited | Other services | 2016 |
| Best Services Team Ltd | Professional & scientific | 2013 |
| BESTFOOD2020LTD Limited | Hospitality | 2020 |
| Beta House Ltd | Households | 2012 |
| Beta House Properties Limited | Real estate | 2021 |
| Better Health Pharmacy Ltd | Health & social care | 2022 |
| Better Media Limited | Professional & scientific | 2010 |
| Better Shift Limited | Administrative & support | 2026 |
| Better Temping Limited | Administrative & support | 2026 |
| Betty's Hair Studio Ltd | Other services | 2017 |
| Beverley & Cranley (Investment) Limited | Households | 2006 |
| Beverley and Cranley (Hove) Limited | Administrative & support | 2005 |
| Beverley Water Treatment Limited | Water & waste | 2000 |
| Bewilder Box Ltd | Arts & recreation | 2015 |
| Beyond Merchandise Ltd | Wholesale & retail | 2005 |
| BFJ Services Ltd | Professional & scientific | 2004 |
| BG & AK Ltd | Real estate | 2020 |
| BH Invest Limited | Real estate | 2013 |
| BHA Trustees Ltd | Financial services | 2019 |
| Bhamber Holdings Limited | Real estate | 2022 |
| Bhamber Limited | Health & social care | 2021 |
| Bhcc Property Services Ltd | Administrative & support | 2018 |
| Bhcm Ltd | Professional & scientific | 2020 |
| Bhrs Development Limited | Construction | 2018 |
| Bhrs Residential Limited | Construction | 2018 |
| Bhsg LLP | | 2023 |
| Bhsp Limited | Professional & scientific | 2014 |
| Bibbabs Ltd | Wholesale & retail | 2024 |
| Biburtry Limited | Construction | 1988 |
| Bicknell Services Limited | Professional & scientific | 2004 |
| Bicknelle.Com Limited | Information & communication | 2016 |
| Bidg Consultants Ltd | Professional & scientific | 2024 |
| Bidlogix Limited | Administrative & support | 2008 |
| Big Beach Marketing Limited | Administrative & support | 2021 |
| Big Bite Productions Limited | Information & communication | 2023 |
| Big Cheese Burger Limited | Hospitality | 2024 |
| Big Red Door Management Limited | Households | 1996 |
| Big School Camp Ltd | Wholesale & retail | 2019 |
| Big Sister & the Holding Company Ltd | Financial services | 2019 |
| Big Space Theatre Productions | Arts & recreation | 1997 |
| Big Thursday Ltd | Information & communication | 2021 |
| Bigfoot Consulting Limited | Professional & scientific | 2009 |
| Bigger Boat Pubco Ltd | Hospitality | 2016 |
| BIK3D Limited | Manufacturing | 2021 |
| Bike Racing Without Mercy Ltd | Information & communication | 2019 |
| Bike Spots Ltd | Administrative & support | 2023 |
| Bilingual Primary School Trust Limited | Education | 2010 |
| Billica Ltd | Professional & scientific | 2024 |
| Billie's Cafe (Hove) Ltd | Hospitality | 2019 |
| Billie's Cafe Ltd | Hospitality | 2019 |
| Bilsborrow Solar Project Limited | Energy | 2014 |
| Bilsham Stores Limited | Wholesale & retail | 2002 |
| Bimm 1 Limited | Education | 2015 |
| Bimm Group Limited | Education | 2010 |
| Bimm Holdings Limited | Education | 2010 |
| Bimm Topco Limited | Administrative & support | 2016 |