| Beever and Struthers Limited | London | 2025 |
| Beevfry Estates Limited | Dinas Powys | 1945 |
| Beexpeditions Ltd | Lancaster | 2022 |
| Beezy World Limited | Wellingborough | 2022 |
| Befab Profiles Limited | Glasgow | 2014 |
| Befeliz Ltd | Haverfordwest | 2024 |
| Before I DIE Ltd | Rugby | 2022 |
| Befr Consult Ltd | Dover | 2024 |
| Begbies Professional Appointments Limited | London | 2010 |
| BEGIN2LIVE Ltd | Littlehampton | 2025 |
| Beginner's Luck Ltd | Cambridge | 2022 |
| Begonvil Co. Ltd | London | 2025 |
| Beguiling Day Limited | London | 2015 |
| Begwary 1954 Limited | Peterborough | 2013 |
| BEH Property Management Ltd | Gateshead | 2012 |
| Beharie Property Enterprise Limited | Sheffield | 2008 |
| Behavioural Solutions Limited | London | 2008 |
| Behechi International Limited | West Midlands, England | 2023 |
| Behold Accounting Ltd | Sheffield | 2024 |
| Behr Medical Limited | Gerrards Cross | 2013 |
| Behre Dolbear Emea Limited | Ashford | 2024 |
| Behringer Saws (UK) Limited | Leighton Buzzard | 2025 |
| Beiaierlan Bann Seaweed Co., Ltd | Beckenham | 2025 |
| Beichen Global Limited | London | 2021 |
| Beide (UK) Product Service Limited | Beckenham | 2009 |
| Beiersdorf Verbindungstechnik Co., Ltd. | Beckenham | 2015 |
| Beige Talent Acquisition Ltd | London | 2016 |
| Beigebell International Limited | Chessington | 2020 |
| Beij Consulting Limited | Harrow | 2014 |
| Beijing Banquet Limited | Glasgow | 2012 |
| Beijing Blue Forest Carbon Industry Co., Ltd | London | 2016 |
| Beijing Design Co Ltd | Ashtead | 2019 |
| Beijing Sino-Asia Trading Co., Ltd | Beckenham | 2019 |
| Beijing Zhongrui Import & Export Co., Ltd | Stafford, | 2016 |
| Being Frank Limited | Dunfermline | 2015 |
| Being Global Ltd | London | 2021 |
| Being ME Events Limited | Tonbridge | 2010 |
| Being One Ltd | Manchester | 2022 |
| Being the Best Limited | London | 2003 |
| Beingpurple Ltd | Milton Keynes | 2021 |
| Beingsmith Ltd | Newcastle Upon Tyne | 2015 |
| Beira Dynamics Ltd | Ellon | 2023 |
| Beirun Import&Export Co., Ltd | Stafford | 2020 |
| Beischer Industries Ltd | Stockport | 2021 |
| Beishuo International Co., Ltd | Beckenham | 2016 |
| Beisuo International Ltd | London | 2013 |
| Beit Al-Sultan IMP and EXP Co., Ltd | London | 2024 |
| Beito Limited | London | 2015 |
| Beka Trade Limited | Beckenham | 2024 |
| Bekaa Services Limited | Leeds | 2024 |
| Bekey Co., Ltd | Manchester | 2022 |
| Beks Services Ltd | London | 2023 |
| BEL Capital Limited | Isleworth | 2013 |
| Belamente International Limited | Cheshire | 2007 |
| Belart Venture Investment UK Limited | London | 2014 |
| Belatime (UK) Ecology Technology Co., Ltd. | Manchester | 2019 |
| Belbo Limited | North Ferriby | 2011 |
| Belcher (Holdings) Limited | Sanquhar | 2008 |
| Beldan LLC Ltd. | London | 2018 |
| Beldhamland Limited | Teddington | 1987 |
| Beldi Cafè Limited | Wirral | 2022 |
| Beldougie Consulting Limited | Wiltshire | 2005 |
| Belei Optoelectronic Technology Co., Ltd | London | 2016 |
| Belfast Alarms Ltd | Holywood | 1998 |
| Belfast Coleraine Assets (NO 2) Limited | Manchester | 2015 |
| Belfast Coleraine Assets Limited | Manchester | 2015 |
| Belfast Dundonald Assets (NO 2) Limited | Manchester | 2017 |
| Belfast Dundonald Assets Limited | Manchester | 2017 |
| Belfast Energy Limited | | 1997 |
| Belfast Hotel Developments Limited | Belfast | 2012 |
| Belfast Locksmiths Limited | Co Down | 2002 |
| Belfast Natural GAS Limited | Belfast | 1997 |
| Belfast Springvale Assets (NO 2) Limited | Manchester | 2015 |
| Belfast Springvale Assets Limited | Manchester | 2015 |
| Belfast Victoria Assets (NO 2) Limited | Manchester | 2015 |
| Belfast Victoria Assets Limited | Manchester | 2015 |
| Belfast Wine Co. Limited | | 1988 |
| Belfiore Management Limited | Preston | 2006 |
| Belfmore Investments Ltd | Magherafelt | 2021 |
| Belfort Group Limited | Harrogate | 2026 |
| Belgeonne European Management Ltd | Towcester | 2011 |
| Belgian Agricultural Technology and Production Co., Ltd | London | 2025 |
| Belgian Weddell Group Co., Ltd | London | 2025 |
| Belgian Woodworks Invest Ltd | Dover | 2017 |
| Belgian Woodworks Ltd | Dover | 2017 |
| Belgium Annely Co., Ltd | Beckenham | 2022 |
| Belgium Anteweipu Plant Nutrition Co., Limited | Cambridge | 2025 |
| Belgium Anuom Fertilizers Co., Ltd | Beckenham | 2015 |
| Belgium Canet Chemical Co., Ltd. | London | 2020 |
| Belgium Fuyanuo Ltd | Beckenham | 2023 |
| Belgium Hosdandon Chemical Industry Group Limited | Kington | 2025 |
| Belgium Kelusuo Chemcial Industry Ltd | Beckenham | 2023 |
| Belgium Limate Crop Nutrition Co., Limited | Cambridge | 2025 |
| Belgium Nomic Special Fertilizer Co., Ltd | Cardiff | 2021 |
| Belgium Olida Special Fertilizer Co., Ltd | Fifth Floor | 2023 |
| Belgium Omai Special Fertilizer Co., Ltd. | London | 2020 |
| Belgium Primeax Stock Limited | Kington | 2024 |
| Belgium Shima (Europe) Chemical Industry Ltd | Beckenham | 2024 |
| Belgium Shima BIO Technology Ltd | Beckenham | 2021 |
| Belgium Sunshine Agriculture Co., Ltd. | London | 2024 |