| Bestrx Lifesciences Private Limited | Uxbridge | 2025 |
| Bestsail Ltd | London | 2024 |
| Besturn Industry Co., Ltd | Cambridge | 2015 |
| Bestvenue.Com Ltd | Sittingbourne | 2006 |
| Bestwares Group Co., Ltd | London | 2013 |
| Bestway Limited | London | 1991 |
| Beswethericks Ltd | Truro | 2018 |
| Beswick Westbrook Limited | Harrogate | 2025 |
| Besxeon Ellis Technology Ltd | Beckenham | 2011 |
| BET (NO. 18) Limited | Crawley | 1976 |
| BET 666 Ltd | Holywell | 2006 |
| BET 7/ 11 Ltd | Harrogate | 2012 |
| BET NOW Limited | Newbury | 2006 |
| BET Pension Trust Limited | Crawley | 1965 |
| Beta Asia Industrial Co Limited | Beckenham | 2019 |
| Beta Ballvalves Limited | Dudley | 1985 |
| Beta Management Limited | | 1985 |
| Beta MGL Limited | Slough | 1994 |
| Betabite Hydraulics Limited | Wilmslow | 2015 |
| BETCHA1975 Productions Limited | Droitwich | 2026 |
| Betel Logistics Ltd | London | 2020 |
| Beteo Ltd | Newcastle | 2023 |
| Beth Brownings Bakery Limited | Kilwinning | 2018 |
| Beth Hyland Designs Limited | Liverpool | 2012 |
| Bethany Group Ltd | London | 2023 |
| Bethany Guild Limited | Birmingham | 1974 |
| Bethesda A.F.C. Social Club (1973) Limited | Bethesda | 1973 |
| Bethesda Children's Foundation | London | 2012 |
| Bethlehem Trading Post Limited | Westcliff-On-Sea | 1994 |
| Bethwaite Limited | Haverfordwest | 1999 |
| Betjack Limited | Paisley | 2008 |
| Betley Court 1960 Limited | Walton-On-Thames | 2014 |
| Betmobile Limited | Bournemouth | 2009 |
| Betong & Byggkonsulten Limited | London | 2020 |
| BETPOOL2 Limited | London | 2012 |
| Bettaelite UK Ltd | Stoke-On-Trent | 2025 |
| Bettamix Limited | Birmingham | 1969 |
| Bettans Investment Limited | London | 2021 |
| Bette & Barb Ltd | Somerset | 2013 |
| Better AIM Limited | London | 2025 |
| Better Beard Ltd | High Wycombe | 2013 |
| Better Buy (H.K) Co., Limited | Cambridge | 2018 |
| Better Doors Ltd | Preston | 2017 |
| Better Driver Limited | Crewe | 2016 |
| Better Drives Services Limited | Driffield | 2008 |
| Better Future International Co., Ltd | Beckenham | 2020 |
| Better Future Training Ltd | Leicester | 2020 |
| Better Giggle Limited | London | 2024 |
| Better Here Than There Property Management Limited | London | 2007 |
| Better International Co., Ltd | Beckenham | 2016 |
| Better Line International Ltd | London | 2016 |
| Better Management Services Limited | Newcastle Upon Tyne | 2012 |
| Better Rankings Limited | Manchester | 2017 |
| Better Retirement Solutions Ltd | Milton Keynes | 2011 |
| Better Society Foundation | London | 2012 |
| Better Websites Limited | Manchester | 2017 |
| Better World Creative Limited | Camberley | 2014 |
| Betterbrand Solutions Ltd | London | 2013 |
| Betterlease Limited | Cheshire | 1992 |
| BETTERLIFE4U Solutions Ltd. | London | 2020 |
| Betterness Limited | Lutterworth | 2010 |
| Betterware Home Products Co., Ltd | Cambridge | 2014 |
| Betting Offers Ltd | London | 2017 |
| Bettiss International Ltd. | Okehampton | 2015 |
| Bettone Enterprises Ltd | Luton | 2010 |
| Betts and Broughton Limited | Loughborough | 2017 |
| Betts and Patel Capital Ltd. | Northampton | 2011 |
| Betts Ecology Limited | Worcester | 2013 |
| Betts Environmental Holdings Limited | Worcester | 2016 |
| Betts Estates (Thorpe Meadows) Limited | Worcester | 2014 |
| Betts Estates (Worcester Earls) Limited | Worcester | 2014 |
| Betts Estates Limited | Worcester | 2014 |
| Betts Homes Ltd | Norwich | 2025 |
| Betts Landscape Services (Ledsham) Limited | Worcester | 2014 |
| Betty B Property Company Limited | London | 2023 |
| Betty Swollocks Limited | London | 2004 |
| Betzbuilt Ltd | Woodbridge | 1995 |
| Beuion Limited | Stafford, | 2022 |
| Beulah Estates Limited | Leeds | 2017 |
| Beulah Property Ltd | London | 2015 |
| Beusimi Ltd | Manchester | 2022 |
| BEV IQ Ltd | Witham | 2021 |
| BEV Ltd | Crewe | 2020 |
| Beva Transport Limited | Nantwich | 2014 |
| Bevan & Buckland Trustees Ltd | Swansea | 2017 |
| Bevan Investments Management Ltd | Coventry | 2013 |
| Beverage Belgium Ltd | Dover | 2024 |
| Beverage GAS Limited | Chesterfield | 2003 |
| Beverage Invest Belgium Ltd | Dover | 2024 |
| Beverley (Leeds) Limited | Halifax | 2001 |
| Beverley 1970 Limited | Hull | 2014 |
| Beverley House Management Company (Cullercoats) Limited | North Shields | 2012 |
| Beverley N2 Ltd | London | 2022 |
| Beverley Terrace Management Company Limited | Newcastle Upon Tyne | 1997 |
| Beverly Denkman Limited | Northampton | 2012 |
| Bevintagegb Ltd | Uckfield | 2021 |
| Bevirs Limited | Swindon | 1988 |
| Bevora Ltd | Crewe | 2026 |
| Bewell Bezero Limited | Sleaford | 2024 |
| Bewell Developed Ltd | Upton | 2022 |