| Baycon Alliance LP | | 2015 |
| Bayel Realty Ltd | Real estate | 2025 |
| Bayersdorf LP | | 2015 |
| Bayesian Labs Ltd | Information & communication | 2026 |
| Bayestin LP | | 2015 |
| Bayfirth Research CIC | Professional & scientific | 2023 |
| Bayley Enterprises L.P. | | 2012 |
| Bayne Ltd | Construction | 2021 |
| Bayona Finance SP | | 2002 |
| Bayonet Holdings Limited | Hospitality | 2025 |
| Bayport Finance LP | | 2014 |
| Bayres Limited | Information & communication | 2026 |
| Bayring Corporation LP | | 2013 |
| Bayron Investments LP | | 2013 |
| Bayrou Business LP | | 2012 |
| Baysal Holding LP | | 2025 |
| Bayshore Marine L.P. | | 2011 |
| Bayside Industrial L.P. | | 2011 |
| Bayside Logistics LP | | 2015 |
| Baysville SP | | 2003 |
| Bayswater Investment SP | | 2003 |
| Bayview Enterprises L.P. | | 2012 |
| Bayview Real Estate L.P. | | 2011 |
| Bazinga Homes Ltd | Hospitality | 2022 |
| Bazis Group LP | | 2017 |
| Bazley Alliance LP | | 2015 |
| BB Cottage Ltd | Hospitality | 2022 |
| BB Hotels Worldwide LP | | 2014 |
| BB Shelf 6 LP | | 2020 |
| BB Taxis Ltd. | Professional & scientific | 2006 |
| Bb&C LP | | 2017 |
| BB25 Ltd | Extraterritorial | 2019 |
| BBA Aviation Scottish Limited Partnership | | 2014 |
| BBB Foods | | 2004 |
| Bbca Property Ltd | Real estate | 2021 |
| Bbcia Ltd | Professional & scientific | 2007 |
| BBG Media LP | | 2025 |
| Bbgp Special Limited Partner LP | | 2005 |
| Bbl.Me Ltd. | Wholesale & retail | 2010 |
| BBO IT LP | | 2017 |
| BBQ and Bar Limited | Hospitality | 2026 |
| Bbspa UK Ltd | Professional & scientific | 2024 |
| Bbtps FP GP Limited | Financial services | 2007 |
| Bbtps FP LP | | 2007 |
| BC Advertising Network LP | | 2019 |
| BC Fsba SMA SFP LP | | 2025 |
| BC II FP SGP Limited | Administrative & support | 2017 |
| BC II GP LLP | | 2017 |
| BC II GP LP | | 2017 |
| BC II SFP LP | | 2017 |
| BC SMA II Carry GP LLP | | 2021 |
| BC SMA II SFP LP | | 2021 |
| BC Stamps Limited | Wholesale & retail | 2008 |
| BC1 Engineering Ltd | Professional & scientific | 2026 |
| BCA - Business Centre Automotive, Limited Partnership | | 2001 |
| Bcac Management Ltd | Extraterritorial | 2012 |
| Bccim GP (Scotland) Limited | Financial services | 2021 |
| BCD Storage Ltd | Transport & logistics | 2019 |
| BCE Catering Limited | Hospitality | 2018 |
| Bcgss 2 Carry LP | | 2014 |
| Bchires Ltd | Hospitality | 2022 |
| Bcip L.P. | | 2004 |
| BCK Geoscience Ltd | Professional & scientific | 2019 |
| Bckm Limited | Professional & scientific | 2024 |
| BCL International LP | | 2016 |
| BCM Testing Limited | Information & communication | 2011 |
| BCO II Carry GP LLP | | 2020 |
| BCO II FC I LP | | 2014 |
| BCO II SLP LP | | 2012 |
| BCO III Carry GP LLP | | 2020 |
| BCO III FC I LP | | 2017 |
| BCO III FC II LP | | 2017 |
| BCO III SLP LP | | 2015 |
| BCO IV Carry GP LLP | | 2021 |
| BCO IV SFP LP | | 2021 |
| BCO V Carry GP LLP | | 2024 |
| BCO V SFP LP | | 2024 |
| BCP Consultancy Limited | Professional & scientific | 2017 |
| Bcpe II Founder Partner S LP | | 2012 |
| Bcpe II FP GP Limited | Financial services | 2012 |
| BCR Trade Ltd | Wholesale & retail | 2023 |
| Bcube Property Ltd | Real estate | 2026 |
| BD 50 Sports Limited | Arts & recreation | 2023 |
| BD Accounting Services Limited | Professional & scientific | 2019 |
| BD Edinburgh Services Limited | Other services | 2026 |
| BD Intel Ltd | Information & communication | 2026 |
| BD Network (Holdings) Limited | Professional & scientific | 2007 |
| BD Network Limited | Professional & scientific | 2001 |
| BD Relations Limited | Information & communication | 2022 |
| BD Ventures Limited | Hospitality | 2025 |
| BD Warehouse UK Limited | Wholesale & retail | 2017 |
| BDC GP LP | | 2014 |
| BDC II (SGP) Limited | Financial services | 2011 |
| BDC II FP GP Limited | Financial services | 2011 |
| BDC II FP LP | | 2011 |
| BDC II GP LP | | 2011 |
| BDC III SFP GP Limited | Financial services | 2016 |
| BDC III SFP LP | | 2016 |
| BDC Investment Management Ltd | Extraterritorial | 2012 |
| BDC IV (French) Co-Invest LP | | 2021 |