| Bestival Limited | Salisbury | 2004 |
| Bestkick Sports Limited | London | 2014 |
| Bestonlinecasinos Ltd | London | 2024 |
| Bestskill Limited | London | 2019 |
| Beswicks Sports Holdings Limited | Stoke On Trent | 2016 |
| Beswicks Sports Limited | Stoke On Trent | 2001 |
| BET 21 Limited | Epping | 2014 |
| BET 247 Limited | London | 1959 |
| BET Ahoy Ltd | Uckfield | 2025 |
| BET Americano Limited | London | 2025 |
| BET Centre (Kiosk) Limited | Stourbridge | 2017 |
| BET Essex (UK) Ltd | Romford | 2011 |
| BET Limited | Wetherby | 2015 |
| BET LMS Limited | Sheffield | 2025 |
| BET Noble Ltd | Louth | 2026 |
| BET Solutions International Limited | Chelmsford | 2002 |
| BET ST George Ltd | Sheffield | 2025 |
| BET TOM Ltd | Uckfield | 2023 |
| BET With Sherlock Limited | Rickmansworth | 2017 |
| Beta Art Limited | Edinburgh | 2025 |
| Beta Band Touring Limited | Manchester | 2024 |
| Beta Bodz Gym Ltd | Birmingham | 2013 |
| Beta Boulders Limited | Bristol | 2017 |
| Beta Design Ltd | Bournemouth | 2019 |
| Beta Events Ltd | London | 2019 |
| Beta Performance Ltd | Aylesbury | 2023 |
| Beta Yachting Ltd | London | 2021 |
| Betaglen Limited | Cannock | 1982 |
| Betaglow Limited | Hampstead | 1982 |
| Betanal Systems Limited | Hertfordshire | 1989 |
| Betcave Ltd | London | 2022 |
| Betchworth Park Golf Club (Dorking) Limited | Dorking | 1941 |
| Betextra Limited | Rotherham | 2010 |
| Betfair Limited | Birmingham | 2004 |
| Betfred Group Holdings Limited | Warrington | 2011 |
| Betfred International Holdings Limited | Warrington | 2018 |
| Betfred Limited | Warrington | 2003 |
| Betfred Sports Cafe Limited | Warrington | 2018 |
| Betfred Technology Limited | Warrington | 2017 |
| Beth Carter Limited | Bristol | 2012 |
| Beth Dawson Ltd | London | 2024 |
| Beth Dunn Voice Limited | Stourbridge | 2026 |
| Beth Edwards Limited | Headley Down | 2010 |
| Beth Fit Ltd | Bishop'S Stortford | 2021 |
| Beth Golding Stylist Limited | London | 2022 |
| Beth Green School of Arts Limited | Bromley | 2024 |
| Beth Morris Workshops Ltd | Cardiff | 2023 |
| Beth Music Limited | Colwyn Bay | 2022 |
| Beth Nicholas Ltd | Wells | 2017 |
| Beth Nixon Ltd | York | 2025 |
| Beth O'Leary Ltd | London | 2017 |
| Beth Painter Artistry Ltd | Wigan | 2026 |
| Beth Potter Limited | Leeds | 2021 |
| Beth Shalom Limited | Newark | 1978 |
| Beth Tweddle Gym Stars Limited | Milton Keynes | 2013 |
| Beth Ward Ltd | Seaham | 2017 |
| Beth-May Design Ltd | Chelmsford | 2019 |
| Bethan Laura Wood Studio Ltd | Doncaster | 2023 |
| Bethan Seller Limited | Manchester | 2019 |
| Bethanie Lauren Wilson Ltd | Saltburn By The Sea | 2023 |
| Bethany Cooper Productions Ltd | Salisbury | 2020 |
| Bethany Hepworth Ltd | Leeds | 2021 |
| Bethanyrosefit Ltd | Warwick | 2026 |
| Bethan’S Singing Services Ltd | Newport | 2024 |
| Betheraycompetitions Ltd | London | 2025 |
| Bethesda Foundation Limited | London | 1999 |
| Bethlehem Calling Ltd | Glasgow | 2024 |
| Bethlem Gallery | Beckenham | 2012 |
| Bethnal Films Limited | London | 2005 |
| Bethnall Green Hitz Ltd | London | 2025 |
| Bethquinn Limited | Derby | 2023 |
| Betizen Limited | Salford | 2022 |
| Betl Ltd | Cardiff | 2022 |
| Betley Court Ltd | Crewe | 2019 |
| Betme Limited | Wetherby | 2016 |
| Betpoint (Credit) Limited | Alton | 1994 |
| Betpro IQ Ltd | London | 2025 |
| Betrescue Limited | Skipton | 2003 |
| Betryan Ltd | London | 2023 |
| Bets and Banter Ltd | Cardiff | 2018 |
| Betsafe Analytics Ltd | London | 2025 |
| Betsafe Ltd | Bury St. Edmunds | 2025 |
| Betsetgo Limited | London | 2018 |
| Betson Ltd | Loughton | 2017 |
| Betsy-Blue Entertainment Ltd | London | 2015 |
| Betsybars Ltd | Doncaster | 2024 |
| Betta Bodies Ltd | Bury | 2026 |
| Bettee's CIC | Newent | 2026 |
| Better Active London Limited | London | 2017 |
| Better Bodies Blackburn Limited | Blackburn | 2021 |
| Better Bodies by Simon Burke Ltd | Wakefield | 2019 |
| Better Bodies Ladies Blackburn Limited | Blackburn | 2021 |
| Better Bodies Ltd | Bedford | 1997 |
| Better Bodies Personal Training Limited | Benfleet | 2014 |
| Better Bodies Westgate Ltd | Skelmersdale | 2023 |
| Better Body Blackheath Limited | Sevenoaks | 2009 |
| Better Body Facilities Limited | Sevenoaks | 2015 |
| Better Body Group Limited | Sevenoaks | 2019 |
| Better Body Sevenoaks Limited | Sevenoaks | 2015 |
| Better Body Training Limited | Truro | 2015 |