| Bana Consulting Ltd | Administrative & support | 2018 |
| Band AID Trading Limited | Arts & recreation | 2004 |
| Bandara Ltd | Professional & scientific | 2024 |
| Barber Vision Ltd | Other services | 2017 |
| Barcem Express Ltd | Wholesale & retail | 2021 |
| Barcem Ltd | Wholesale & retail | 2019 |
| Barclay Search Limited | Administrative & support | 2016 |
| Barefoot Productions Ltd | Professional & scientific | 2017 |
| Baringa Ltd | Administrative & support | 2008 |
| Barnard Mercer Limited | Real estate | 2016 |
| Barnfield Gardens Freehold Ltd | Households | 2020 |
| Baroncino Ltd | Real estate | 2022 |
| Bartholomews Lettings Ltd. | Administrative & support | 2000 |
| Bartholomews Limited | Administrative & support | 1997 |
| Bartholomews Property Management Ltd. | Administrative & support | 2000 |
| Bartholomews Sales Limited | Administrative & support | 2000 |
| Barto Limited | Professional & scientific | 2011 |
| Barton Technology Limited | Information & communication | 2000 |
| Barttech Limited | Information & communication | 2009 |
| Baruk Hashem Investments Limited | Wholesale & retail | 2020 |
| Basclub.Co.Uk Ltd | Arts & recreation | 2026 |
| Basecone Ltd. | Information & communication | 2013 |
| Basic Properties Limited | Real estate | 2003 |
| Basio Construction Ltd | Construction | 2019 |
| Bass.It Limited | Professional & scientific | 2014 |
| BAT Gardens Maintenance Limited | Households | 2015 |
| Bathroom Eleven Limited | Construction | 2013 |
| Batterseayoga Limited | Arts & recreation | 2010 |
| Battle Resources UK Limited | Financial services | 2025 |
| Bavaria Exim Ltd | Wholesale & retail | 2016 |
| Bawi Law Offices Ltd | Professional & scientific | 2022 |
| Baxford Ltd | Information & communication | 2010 |
| BAXTER4 Solutions Ltd | Administrative & support | 2020 |
| Bayliss Illustrations Ltd | Arts & recreation | 2025 |
| Bays Farm Court RTM Company Limited | Households | 2008 |
| BBG Professionals Ltd | Professional & scientific | 2011 |
| BC Consulting and Coaching Psychology Ltd | Professional & scientific | 2019 |
| BCL Contracting Solutions Limited | Professional & scientific | 2025 |
| Bcpl Limited | Wholesale & retail | 2005 |
| BE Collective Europe Limited | Information & communication | 2019 |
| BE Innovative Software Solutions Ltd | Information & communication | 2016 |
| BE Seen Media Ltd. | Professional & scientific | 2015 |
| Be-Do Projects Limited | Manufacturing | 2016 |
| BEA Bryan Ltd | Real estate | 2024 |
| Beaconpoint Properties Limited | Construction | 2006 |
| Beargamil Limited | Hospitality | 2022 |
| Beaumont Designs Limited | Administrative & support | 2009 |
| Beaumont Ventures (Investments) Limited | Real estate | 2015 |
| Beaumont Ventures Limited | Real estate | 2009 |
| Beautty Hub Ltd | Other services | 2024 |
| Beauty and Deen Limited | Wholesale & retail | 2024 |
| Beauty N Grace London Ltd | Other services | 2026 |
| Beauty N Grace Ltd | Other services | 2025 |
| Beautyart Kingston Ltd | Other services | 2019 |
| Beautytem Ltd | Wholesale & retail | 2020 |
| Beddington Park Residents Company Limited | Households | 1995 |
| BEE Investments Ltd | Professional & scientific | 2009 |
| Beechfield Residents Association (Weybridge) Limited | Real estate | 2014 |
| Beeclearance UK Ltd | Water & waste | 2023 |
| Beeclearence Ltd | Water & waste | 2023 |
| Beerwell Ltd | Wholesale & retail | 2021 |
| Behind the Curtains Ltd | Wholesale & retail | 2019 |
| Belinda Riley Limited | Professional & scientific | 2021 |
| BELLA7501 Ltd | Hospitality | 2023 |
| Bellex H Limited | Professional & scientific | 2000 |
| Bellsaddle Limited | Administrative & support | 1983 |
| Belvedera Ltd | Information & communication | 2013 |
| Belvedere Place Management Company NO.2 Limited | Households | 2000 |
| Belysimo Ltd | Professional & scientific | 2013 |
| BEN Summersby Artwork Limited | Manufacturing | 2024 |
| BEN Wellington Producer Limited | Administrative & support | 2023 |
| Bending Spoons UK Limited | Information & communication | 2025 |
| Benhill Properties Limited | Real estate | 2023 |
| Benjamin JW Sumrie Ltd | Arts & recreation | 2025 |
| Bentley Boys Property Limited | Construction | 2015 |
| Bentley Pugh & Associates Ltd | Professional & scientific | 2010 |
| BER Limited | Construction | 2004 |
| Berringford Limited | Administrative & support | 2014 |
| Bespoke Fabrication Services Limited | Manufacturing | 2018 |
| Bespoke Security Systems Limited | Administrative & support | 2018 |
| Bespokeecohaircare Ltd | Other services | 2023 |
| Besuto Limited | Information & communication | 2018 |
| Beta Design Consultants Ltd | Professional & scientific | 2009 |
| Beta Holding Group Limited | Financial services | 2022 |
| Beta Real Estate Ltd | Construction | 2020 |
| Bethbowie Ltd | Professional & scientific | 2018 |
| Betsense Limited | Information & communication | 2017 |
| Better Hospitality Ltd | Administrative & support | 2015 |
| Better Q Ltd | Wholesale & retail | 2019 |
| Betterleather Collective Ltd | Wholesale & retail | 2023 |
| Betterton Hotels Ltd | Hospitality | 2011 |
| Betterton IT Projects Limited | Administrative & support | 2017 |
| Betterton Personnel Services Ltd | Administrative & support | 2019 |
| Betterton Services Ltd | Professional & scientific | 2013 |
| Betts Construction & Development Limited | Construction | 2013 |
| Bexholt Limited | Construction | 2024 |
| Bexts.Com Ltd | Information & communication | 2018 |
| Beyondbeliefaesthetics Ltd | Other services | 2023 |
| Bezacroft Limited | Hospitality | 2005 |
| BF Hair HAM Limited | Other services | 2026 |