| Buckettsland Ltd | Edgware | 2023 |
| Buckholt Bryngaer CIC | Monmouth | 2023 |
| Buckholt Investments Limited | Bexhill-On-Sea | 2006 |
| Buckholt Stables Limited | Salisbury | 2025 |
| Buckhurst Hill Leisure Gardens CIC | Buckhurst Hill | 2015 |
| Buckingham Bond Ltd | London | 2019 |
| Buckingham CCA Limited | Buckingham | 2015 |
| Buckingham Cleaners Limited | Bristol | 2015 |
| Buckingham DRY Cleaners Limited | London | 1983 |
| Buckingham Lords Limited | Buckingham | 2016 |
| Buckingham Nails and Spa Ltd | Buckingham | 2024 |
| Buckingham Survey and Design Limited | Stevenage | 2020 |
| Buckingham Tailors Ltd | Ilford | 2018 |
| Buckingham Therapy Group Ltd | Buckingham | 2022 |
| Buckinghamshire Advantage | Aylesbury | 2004 |
| Buckinghamshire Medispa Limited | Mildenhall | 2024 |
| Buckinghamshire Wellness Clinic Ltd | Bury St. Edmunds | 2026 |
| Buckland Beauty Limited | Yelverton | 2012 |
| Buckland Chapel Trust | Yelverton | 2011 |
| Buckland Court Drives Ltd | Betchworth | 2019 |
| Bucklebury Penn Investments Limited | London | 2024 |
| Bucklemount Limited | Birmingham | 1996 |
| Buckler Surveys & Engineering Limited | Weybridge | 1998 |
| Buckley and Associates Limited | London | 2026 |
| Buckley Angling Limited | Buckley | 2021 |
| Buckley Asset Finance Ltd | Sandbach | 2017 |
| Buckley Bracondale Limited | London | 2010 |
| Buckley Landscape Supplies Ltd | Newark | 2021 |
| Buckley Memorials Limited | Widnes | 2001 |
| Buckley Motors Limited | Market Drayton | 2012 |
| Buckley's Pet Boarding Ltd | Huntingdon | 2019 |
| Buckleys Building Surveys Limited | Hampton | 1997 |
| Buckminster Funerals Limited | Leicester | 2004 |
| Buckminster Management Limited | Grantham | 1980 |
| Bucknall James Limited | London | 2013 |
| Bucknell Gardens (Hawthorn Court Solihull) RTM Company Limited | Birmingham | 2009 |
| Bucknell Ltd | Folkestone | 2025 |
| Bucknor & James Ltd | London | 2026 |
| Bucks & Berks Plumbing and Heating Ltd | Maidenhead | 2021 |
| Bucks Aesthetics Limited | Aylesbury | 2025 |
| Bucks Barbers Canalside Ltd | Brentwood | 2017 |
| Bucks Barbers Limited | Loughton | 2013 |
| Bucks Beauty Bar Ltd | High Wycombe | 2025 |
| Bucks FTS Ltd | London | 2025 |
| Bucks Garment Care Ltd | Harrow | 2025 |
| Bucks Gospel Fellowship CIC | Buckingham | 2024 |
| Bucks Hairdressing IT Consultancy Limited | Beaconsfield | 2022 |
| Bucks Housing Ltd | Northwood | 2018 |
| Bucks Laundry Room Ltd | High Wycombe | 2011 |
| Bucks Management Ltd | Northwood | 2018 |
| Bucks Midland Services Ltd | Gateshead | 2021 |
| Bucks Nail Ltd | London | 2019 |
| Bucks Stocktakers Limited | High Wycombe | 2013 |
| Bucks&Doe Hairdressing Limited | Andover | 2021 |
| Buckskin Evangelical Church | Basingstoke | 2011 |
| Buckstechi Ltd | Milton Keynes | 2021 |
| Buckswood Ltd | Worthing | 2020 |
| Buckworths Nominees Limited | London | 2017 |
| Bucky Services Limited | Edinburgh | 2025 |
| Buco Zahit Ltd | Liverpool | 2025 |
| Buczkowski Fork (UK) Limited | London | 2017 |
| BUD and Flower Limited | London | 2020 |
| BUD Flanagan Leukaemia Fund Limited | Eastbourne | 2002 |
| BUD Garden Centre Limited | Manchester | 2014 |
| BUD Gremlin Ltd | Denby | 2019 |
| BUD Rescue & Recovery Limited | St. Albans | 2004 |
| Buda Beauty Ltd | Darlington | 2025 |
| Budara Partners Ltd | Bury St. Edmunds | 2025 |
| Budd Technical Services Ltd | Uxbridge | 2011 |
| Buddha Beauty & Holistic Limited | Manchester | 2023 |
| Buddha Box Limited | London | 2017 |
| Buddha Hair & Beauty Ltd | Poole | 2016 |
| Buddha Hove Nail Ltd | Hove | 2026 |
| Buddha Land Kadampa Meditation Centre Ltd | Keighley | 2001 |
| Buddha Nail Salon Limited | Hove | 2022 |
| Buddha on a Bicycle Ltd | Dorchester | 2008 |
| Buddhadharmasangha Community Interest Company | Norwich | 2022 |
| Buddhist Community Centre Kent Ltd | Ashford | 2017 |
| Buddie (NW) Limited | St. Asaph | 2020 |
| Buddie's Play DEN Ltd | Chesterfield | 2023 |
| Buddies Rail Ltd | Folkestone | 2023 |
| Budding Ventures Ltd | Plymouth | 2018 |
| Buddleford Broadoak Limited | Cullompton | 2013 |
| Buddy AID Ltd | Thornton-Cleveleys | 2018 |
| Buddy and Friends Ltd | South Shields | 2025 |
| Buddy Consulting Ltd | Leeds | 2025 |
| Buddy Hair Ltd | Swansea | 2023 |
| Buddy's Appliance Repairs Ltd | Ferndown | 2026 |
| Buddy's Barbers SCO Limited | Glasgow | 2024 |
| Buddys Barber Shop Ltd | Burton On Trent | 2023 |
| Buddys Barbers Ltd | Leeds | 2019 |
| Bude Area Tourist Board Limited | Bude | 1987 |
| Bude Hawa Barber Ltd | Bude | 2023 |
| Bude Interiors & Consultancy Ltd | Mildenhall | 2016 |
| Bude Laundry Services Ltd | Bude | 2022 |
| Bude Nails Limited | Bude | 2024 |
| Bude Skin Clinic Ltd | Bude | 2025 |
| Bude Windows and Conservatories Limited | Bude | 2003 |
| Budgecrest Limited | Grimsby | 1990 |
| Budget Deals Limited | Glasgow | 2020 |