| Building Your Confidence Limited | Denbigh | 2024 |
| Built Around Fitness Ltd | Peterborough | 2023 |
| Built by Bryce Limited | Leyland | 2025 |
| Built Different Day Care Ltd | Newark | 2024 |
| Built for Life Online Coaching Limited | Northampton | 2026 |
| Built in Your 20S Ltd | London | 2026 |
| Builthealth Limited | Abingdon | 2025 |
| Buizer Family Eyecare Ltd | Great Yarmouth | 1956 |
| Buji Technologies Limited | London | 2025 |
| Bujorean Limited | Leighton Buzzard | 2017 |
| Bujud Limited | Wolverhampton | 2025 |
| BUK Care Limited | Dagenham | 2019 |
| Bukaf Services Limited | Edgware | 2015 |
| Bukaid Ltd | London | 2023 |
| Bukata Ltd | Romsey | 2015 |
| Bukay Limited | Sidcup | 2015 |
| Bukcs Limited | Milton Keynes | 2016 |
| Bukenzo Limited | Northampton | 2016 |
| Bukhari Group Ltd | Leicester | 2023 |
| Bukhari Healthcare Limited | Welwyn | 2021 |
| Bukhari Optics Ltd | Preston | 2014 |
| Bukharis Ltd | Newport | 2022 |
| Bukhsh Company Limited | Cambridge | 2013 |
| Bukkis Ltd | Welling | 2022 |
| Bukkyj Limited | Bristol | 2019 |
| Bukkysonik Ltd | Stanford-Le-Hope | 2022 |
| Bukliz Steps Limited | Rainham | 2025 |
| Bukola Kassim Business Company Ltd | Erith | 2018 |
| Bukola Olarewaju and Co. Ltd | Slough | 2021 |
| Bukshimer Limited | Bournemouth | 2024 |
| Bukylade Ltd | Wolverhampton | 2025 |
| Bulak Ltd | London | 2026 |
| Bulan Consulting Limited | Kilmarnock | 2024 |
| Bulawayo Brothers Limited | Cardiff | 2014 |
| Bulawayo Limited | Bracknell | 2009 |
| Bulby Psychology Ltd | Birmingham | 2023 |
| Bule Nile Consultancy Limited | Milton Keynes | 2022 |
| Bulegiles Ltd | Ilford | 2020 |
| Bulgarians in Kent CIC | Gillingham | 2024 |
| Bulijoe Limited | Stevenage | 2018 |
| Buliks Limited | Aberdeen | 2020 |
| Bulinska Dermatology Medical Services Limited | Burnham-On-Crouch | 2015 |
| Bulius Limited | St. Helens | 2014 |
| Bulk&Swole Ltd | Ross-On-Wye | 2023 |
| Bulkbru Limited | London | 2020 |
| Bull Care Services Ltd | Dartford | 2022 |
| Bull Medical Services Ltd | Leeds | 2022 |
| Bullamore Systems Limited | Carlisle | 2015 |
| Bulldog Comps Limited | Leicester | 2025 |
| Bulldog Event Medical Services Ltd | Benfleet | 2025 |
| Bullen-Brown Limited | Wilden | 2016 |
| Bullet Coaching Ltd | Bromyard | 2021 |
| Bulletproofbodies Ltd | Fleet | 2014 |
| Bullingdon Medicolegal Ltd | Lincoln | 2024 |
| Bulls Healthcare Services Ltd | Paisley | 2017 |
| Bullsmoor Dental Practice Limited | Enfield | 2010 |
| Bulmershe Medical Limited | Oxford | 2019 |
| Bulolo and Family Limited | Feltham | 2012 |
| Bulstrode Plastic Surgery Limited | Wilmslow | 2020 |
| Bult Ltd | Leeds | 2022 |
| Bultitude Medical Services Limited | London | 2014 |
| Bulwark Supported Living Ltd | Eastleigh | 2024 |
| Bulwell Dental Practice Ltd | Nottingham | 2026 |
| Bulya Limited | Northampton | 2023 |
| Bumade Healthcare Services Ltd | Chatham | 2021 |
| Bumat Healthcare Ltd | Sheerness | 2019 |
| Bumble & Bloom Childcare Limited | Egham | 2026 |
| Bumble & Bloom Childminding Ltd | Bedford | 2026 |
| Bumble BEE Physio Ltd | London | 2018 |
| Bumble Bees Childcare Limited | London | 2017 |
| Bumble Bees Day Nursery and Preschool Ltd | Sevenoaks | 2026 |
| Bumble Bees Nursery Limited | London | 2013 |
| Bumble Bees Private Day Nursery School Ltd | Tonbridge | 2023 |
| Bumble Bells Ltd | Orpington | 2023 |
| Bumblebee Coaching Ltd | London | 2026 |
| Bumblebee Daycare Limited | London | 2025 |
| Bumblebeepsychology Ltd | Colchester | 2025 |
| Bumblebees Sensory and Messy Play Limited | Sudbury | 2026 |
| Bumblee Ltd | London | 2023 |
| Bumblefit Ltd | Manchester | 2025 |
| Bumbles B Day Nursery Limited | Liskeard | 2015 |
| Bumbles Children's Day Nursery Limited | Leeds | 2017 |
| Bumbles Daycare Limited | Belfast | 2014 |
| Bumbly Bees Nursery School Ltd | Dundee | 2025 |
| Bump & Beyond Ryecroft Day Nursery Limited | Manchester | 2023 |
| Bump and Beyond Best Body for Pregnancy Ltd | Berkhamsted | 2022 |
| Bump and Beyond Health & Wellness Group Ltd | Bury | 2021 |
| Bump Boobs Babi Ltd | Newport | 2021 |
| Bump Health Ltd | Manchester | 2012 |
| Bump of Blackpool Ltd | Blackpool | 2026 |
| Bump of Churchtown Limited | Southport | 2016 |
| Bump of Preston Ltd | Preston | 2022 |
| Bump to Baby (Scotland) Limited | Glasgow | 2016 |
| Bump to Baby Scanning Limited | Ayr | 2019 |
| Bump to Balance Ltd | Leigh-On-Sea | 2024 |
| Bump to Beyond Ltd | Rochdale | 2019 |
| Bump to Three (& Beyond!) Community Interest Company | Kenilworth | 2012 |
| Bump, Birth & Boobs Ltd | Church Crookham, Fleet, | 2023 |
| BUMP2BABY Scans Limited | Leicester | 2017 |
| Bumpkins-York Limited | York | 2016 |