| Birmingham Tradfest Ltd | Solihull | 2013 |
| Birmingham Walking Football Club Ltd | Solihull | 2022 |
| Birmingham Young Volunteers Association Limited | Lozells Birmingham | 1982 |
| Birmingham Youth Theatre Ltd | Bedworth | 2003 |
| Birmz IS Grime Ltd | Birmingham | 2019 |
| Birnam Arts | Birnam, Dunkeld | 2011 |
| Birnam Wood Productions Limited | London | 2024 |
| Birnbeck Regeneration Trust | Weston Super Mare | 2004 |
| Birring Events Limited | Birmingham | 2025 |
| Birse Community Trust | Perthshire | 1998 |
| Birth of a MAN Limited | Norfolk | 1980 |
| Birth of a Nation Limited | Wanstead | 1985 |
| Birth Rites Exhibition | London | 2006 |
| Birthday Bouncers Gatley Limited | Cheadle | 2012 |
| Birthday Films Limited | London | 2024 |
| Birtle RC Ltd | Rochdale | 2025 |
| Birtley (Portobello) Golf Club Limited | Chester Le Street | 1966 |
| Birtley Gym Ltd | Chester Le Street | 2021 |
| Birtley Town Football Club (Trading) Limited | Birtley | 2026 |
| Birtsmorton Court Events Limited | Worcester | 2020 |
| Birtsmorton Court Limited | Worcester | 2000 |
| Biscits Music Ltd | London | 2024 |
| Biscuit & Mothersole Ltd | London | 2025 |
| Bish Bash Bosh TV & Film Ltd | Broadway | 2019 |
| Bish Bash Music Limited | Birmingham | 2013 |
| Bish Bash POT Limited | York | 2017 |
| Bish Bash Productions Limited | Pinner | 2003 |
| Bishahockey Limited | Southend-On-Sea | 2008 |
| Bisham Abbey Sailing and Navigation School Ltd | Marlow | 1998 |
| Bishop Auckland Football Club Limited | Bishop Auckland | 1997 |
| Bishop Auckland Rugby Union Football Club Limited | Bishop Auckland | 2019 |
| Bishop Juniors FC Ltd | Shildon | 2017 |
| Bishop Scenic Arts Ltd | Swindon | 2026 |
| Bishop Sutton AFC CIC | Bishop Sutton | 2025 |
| Bishop Triathlon Limited | Ipswich | 2016 |
| Bishop United CIC | Bishop Auckland | 2019 |
| Bishop's Castle Michaelmas Fair | Bishops Castle | 2000 |
| Bishop's Stortford Football Club Limited | Bishop'S Stortford | 1990 |
| Bishop's Stortford Golf Club 2004 Limited | Bishop'S Stortford | 2004 |
| Bishop's Stortford Rugby Football Club (2015) | Bishop'S Stortford | 2015 |
| Bishop's Stortford Sinfonia Ltd. | Saffron Walden | 2001 |
| Bishops Avenue Entertainment Ltd | London | 2019 |
| Bishops Castle Carnival Limited | Bishops Castle | 2014 |
| Bishops Itchington Sports Association Ltd | Southam | 2003 |
| Bishops Lydeard Association Football Club Community Interest Company | Taunton | 2008 |
| Bishops Nympton Community Club | South Molton | 2017 |
| Bishops Stortford Community Football Club | Bishop'S Stortford | 2016 |
| Bishops Stortford Futsal Ltd | Bishop'S Stortford | 2025 |
| Bishops Waltham Festival | Bishops Waltham | 2004 |
| Bishopscourt Diff and Drift Ltd | Downpatrick | 2023 |
| Bishopscourt Kart Club Ltd | Craigavon | 1996 |
| Bishopstoke Fishing Club Trustees Ltd | Eastleigh | 2011 |
| Bishopstoke Football Club Ltd | Southampton | 2025 |
| Bishopswood Golf Limited | Walton On Thames | 2015 |
| Bishopthorpe Moorings and Marina Limited | York | 2023 |
| Bishopton Community Development Trust | Bishopton | 2016 |
| Bishop’S Stortford Community Sports Club | Buntingford | 1978 |
| Biskit Productions Limited | Ascot | 2020 |
| Bisko Limited | Rainhill | 2023 |
| Bisley at Braidwood Limited | Bisley | 1998 |
| Bisley PAY and Play Limited | Bisley | 2020 |
| Bison in the Community Limited | Lichfield | 2011 |
| Bison Manoeuvres Ltd | Ashford | 2013 |
| Bison Productions Ltd | Manchester | 2023 |
| Bison Strength and Fitness Limited | Reigate | 2019 |
| Bisonne Ltd | London | 2025 |
| Bisp Solutions Ltd | Ormskirk | 2020 |
| Bissalanka Jazz Events & Production Ltd | London | 2024 |
| Bisset Adams Limited | London | 1994 |
| Bistro L!Ve Limited | Leicester | 2000 |
| Biswas Music Limited | Salford | 1988 |
| BIT Bash Entertainment Ltd | Barnstaple | 2025 |
| BIT of FUN Limited | Lee On The Solent | 2022 |
| Bitabobs Limited | Bolton | 2016 |
| Bitb Cash Ltd | Edinburgh | 2020 |
| Bitca Limited | Sheffield | 2003 |
| Bitcoin Giveaway Club Ltd | London | 2024 |
| Bitcoin Racing Limited | West Malling | 2022 |
| Bite Back With LIZ Ltd | London | 2022 |
| Bite the Apple CIC | Shepton Mallet | 2025 |
| Bite the Bullet Esports Ltd | Wellingborough | 2026 |
| Biteback Self Defence Ltd | London | 2023 |
| Bitesize Films Ltd | London | 2011 |
| Bitesized Media Ltd | London | 2025 |
| Bits & Pieces Theatre Limited | Canterbury | 2024 |
| Bits and Pieces Entertainment Limited | Dartford | 2022 |
| Bitter Pill Limited | London | 2015 |
| Bitter Thirst Production Limited | Saffron Walden | 2022 |
| Bittle Performance Ltd | Kington | 2026 |
| Bitton A.F.C. Limited | Bitton | 2003 |
| Bitz and Bobz UK Competitions Ltd | Hull | 2025 |
| Bitzcomps Ltd | Minehead | 2023 |
| Bivona Brown Limited | High Wycombe | 2017 |
| Bizel Art Limited | Cardiff | 2026 |
| Bizet Media Limited | Fulham | 2020 |
| Bizi Arts Studios CIC | Stockton-On-Tees | 2020 |
| Bizi Club Limited | Winchester | 1999 |
| Bizi ENT Ltd | Woodford Green | 2025 |
| Bizmane Entertainment Limited | | 1998 |
| Bizwash Ltd | London | 2020 |