| Bull - IT Print Limited | Cannock | 2008 |
| Bull and a COW Butchers Limited | St Albans | 2017 |
| Bull Barrier Limited | Bury St. Edmunds | 2015 |
| Bull Dogs Recovery Rescue & Transport Services Ltd | Northampton | 2025 |
| Bull Fabrications Limited | Rugby | 2013 |
| Bull Ring Fashion Ltd | Leicester | 2014 |
| Bull Shark Vodka Limited | Corringham | 2026 |
| Bull Ventilation Ltd | Wolverhampton | 2025 |
| Bull-Works Gates and Railings Ltd | Kilwinning | 2021 |
| Bullard Corporations Ltd | London | 2024 |
| Bullard Family Limited | Dereham | 2019 |
| Bullards Beers Limited | Norwich | 2018 |
| Bullbarrow Products Limited | Tipton | 2019 |
| Bulldog Boats Ltd | Coventry | 2019 |
| Bulldog Castors Ltd | Leicester | 2015 |
| Bulldog CSU Ltd | Louth | 2023 |
| Bulldog Gear Ltd | Rugeley | 2011 |
| Bulldog International Gifts Limited | Stoke On Trent | 2026 |
| Bulldog IP Co Ltd | Rugeley | 2022 |
| Bulldog Locksmiths Limited | Wembley | 2021 |
| Bulldog Marine & Technical Services Limited | Stockton-On-Tees | 2001 |
| Bulldog Metal Products Limited | Kingswinford | 2020 |
| Bulldog Plant & Equipment Ltd | Dunmow | 2021 |
| Bulldog Plant Ltd | Lowestoft | 2021 |
| Bulldog Print Group Ltd | Bicester | 2021 |
| Bulldog Remoulds Limited | Warwick | 1968 |
| Bulldog Security Products Limited | Much Wenlock | 1984 |
| Bulldog Sheds and Fencing Limited | High Wycombe | 2007 |
| Bulldog Steel Fabrications Limited | Market Harborough | 1999 |
| Bulldogz TS Ltd | Baldock | 2019 |
| Bulldozer Media Limited | Orpington | 2002 |
| Bulleigh Fabrications Limited | Newton Abbot | 2018 |
| Bullen Fabrication Ltd | Cardiff | 2011 |
| Bullen International Healthcare Limited | Liverpool | 1995 |
| Bullet 69 Ltd | 472 Hackney Road | 2001 |
| Bullet Engineering Limited | Lincolnshire | 1996 |
| Bullet Lift Services Limited | Rotherham | 2003 |
| Bullet Liner UK Ltd | Darlington | 2023 |
| Bullet Ventures Limited | Exeter | 2010 |
| Bulletproof Brewing Ltd | Plymouth | 2016 |
| Bullfinch Brewery Limited | Ottery St. Mary | 2013 |
| Bullfinch(Gas Equipment)Limited | Tyseley | 1959 |
| Bullfit Ltd | Rotherham | 2020 |
| Bullfit Sports Limited | Dudley | 2025 |
| Bullfix Ltd | Warwick | 2018 |
| Bullforge Studio Ltd | London | 2025 |
| Bullgate Engineering Services Limited | Alderley Edge | 1998 |
| Bullhorn Foods Ltd | London | 2026 |
| Bullhouse Brewing Company Limited | Belfast | 2017 |
| Bullion Brother Investment Limited | London | 2018 |
| Bullion Group Limited | Sheffield | 2016 |
| Bullion X UK Inc Ltd | Cardiff | 2025 |
| Bullitt Tech Co., Ltd | London | 2024 |
| Bullivant Agricultural Limited | Durham | 2021 |
| Bullivant Engineering Limited | Sheffield | 2002 |
| Bullmastiff Brewery Limited | Cardiff | 2015 |
| Bulloak Ltd | Reading | 2021 |
| Bullock Investments Limited | Derby | 2014 |
| Bullock Joinery Limited | Hereford | 2007 |
| Bullring Bakers Ltd | Birmingham | 2021 |
| Bullring Fabrics Ltd | Birmingham | 2024 |
| Bulls Bridge Timber Limited | Saffron Walden | 2019 |
| Bullseye PR Consultants Ltd | Yarm | 2019 |
| Bullshark Aero Ltd | Horndean | 2024 |
| Bullshift Sales Limited | Nantwich | 2016 |
| Bulltech Belting Ltd | Derby | 2022 |
| Bullwater Limited | Yeadon | 2012 |
| Bullyade Limited | Telford | 2017 |
| Bullyion International Ltd | Leicester | 2023 |
| Bulman (Metal Fabrications) Limited | 41 Park Cross Street | 1951 |
| Bulmer & Lumb Group Limited | Bradford | 2001 |
| Bulmers Carpentry & Joinery Ltd | Alcester | 2024 |
| Bulmers Machinery Company Limited | Alcester | 2012 |
| Bulmor Lancer Ltd | Leighton Buzzard | 2000 |
| Bulned Ltd | London | 2024 |
| Bulp Ltd | Birmingham | 2023 |
| Bulpha Limited | Cullompton | 2021 |
| Bulpitt Print Limited | Andover | 1998 |
| Bulrush (Norfolk) Ltd | Thetford | 2019 |
| Bulsar Engineering (Coventry) Limited | Coventry | 2006 |
| Bulte Plastics (UK) Limited | Waterlooville | 1999 |
| Bulten Stainless Limited | Scunthorpe | 1964 |
| Bulu Limited | Edgware | 2009 |
| Bulut 1 Limited | Birkenhead | 2025 |
| Bulut Limited | Wellingborough | 2015 |
| Bulut Ltd Group Ltd | Chester | 2023 |
| Bulvar International Limited | Market Drayton | 2016 |
| Bulwark Services Limited | Stonehaven | 2007 |
| Bumba Zonkie Limited | Newport | 1999 |
| Bumble & BEA Limited | London | 2026 |
| Bumble & BEE Jewellery Ltd | Basingstoke | 2021 |
| Bumble & Goose Ltd | Bangor | 2021 |
| Bumble and Brae Ltd | Gardenstown | 2025 |
| Bumble Beez International Ltd | London | 2025 |
| Bumble Boards Ltd | Ilford | 2020 |
| Bumble Hole Eggs Limited | Bromsgrove | 1973 |
| Bumble Hole Foods Limited | Worcestershire | 2001 |
| Bumblebee Bakes Ltd | Cheadle | 2022 |
| Bumblebee Cottage U.K Limited | Bude | 2023 |
| Bumblebee Lighting Limited | Southampton | 2016 |