| Backland Studios Ltd | Peterborough | 2022 |
| Backloop Ltd | Newcastle Upon Tyne | 2026 |
| Backseat Media Ltd | London | 2024 |
| Backspindle Games Limited | Newtownards | 2010 |
| Backstage Rigging Ltd | London Colney | 2014 |
| Backstory Limited | Edinburgh | 2016 |
| Backstrap Worldwide Ltd | London | 2022 |
| Backup Medical Ltd. | Glasgow | 2016 |
| Backup Power Services Ltd | Leicester | 2025 |
| Backupstores Limited | Devon | 2000 |
| Backwater Fisheries Ltd | Peterborough | 2020 |
| Backwater Forge Ltd | Cambridge | 2023 |
| Backyard Limited | London | 2015 |
| Backyard Sublimation Ltd | Livingston | 2025 |
| Baco. Global Ltd. | London | 2022 |
| Bacobara Limited | London | 2007 |
| Bacon & Elms Ltd | Colchester | 2024 |
| Bacrown UK Ltd | Bradford | 2025 |
| Bacs (Scotland) Limited | Dalkeith | 1996 |
| Bact Fabrications Limited | Hessle | 2023 |
| Bacterzyme Global Ltd | Tunbridge Wells | 2024 |
| Bacx Life Sciences Ltd. | Oxford | 2020 |
| BAD and Boojie Coffee Ltd | Olney | 2023 |
| BAD Apple Cider Limited | Newark | 2015 |
| BAD Apple Engineering Ltd | Ellesmere Port | 2016 |
| BAD ASS Baboon Group Ltd | Doncaster | 2020 |
| BAD ASS Bikes Ltd | Bristol | 2004 |
| BAD B Frames Limited | London | 2022 |
| BAD B Media Limited | Borehamwood | 2023 |
| BAD BOY Chilli Mash Limited | Lostwithiel | 2014 |
| BAD BOY Lanyards Ltd | Godalming | 2021 |
| BAD Boys Garage Ltd | Welwyn | 2019 |
| BAD Breed Prints Ltd | London | 2025 |
| BAD Coffee Limited | Leigh On Sea | 2021 |
| BAD Dog Designs Nixie Clocks Limited | Stafford | 2016 |
| BAD Dragon Limited | Greenfield | 2020 |
| BAD Girl Bakery Ltd | Edinburgh | 2015 |
| BAD Hair Day Club Ltd | London | 2025 |
| BAD Indies Limited | London | 2025 |
| BAD Label Ltd | Watford | 2022 |
| BAD London Limited | Lincoln | 2012 |
| BAD Monday Limited | Stevenage | 2018 |
| BAD Monkey Conversions Ltd | Scunthorpe | 2019 |
| BAD News Delivered Ltd | St. Neots | 2022 |
| BAD Records Limited | Lechlade | 2024 |
| BAD World Ltd | Towcester | 2023 |
| Bad-Boy Brewing Company Ltd | Bexhill-On-Sea | 2020 |
| Badachro Distillery Ltd | Gairloch | 2018 |
| Badco & Co Ltd | Northampton | 2022 |
| Badcock Services Limited | Headcorn | 2003 |
| Baddeley Brothers Limited | London | 1993 |
| Baddow Joinery Ltd | Maldon | 2011 |
| Bade Body Ltd | London | 2025 |
| Bade Newby Display Limited | Loughborough | 2005 |
| Bade World Ltd. | London | 2019 |
| Badge Bespoke Ltd | London | 2017 |
| Badge BOY Ltd | Hockley | 2013 |
| Badge Creation Limited | Borehamwood | 2013 |
| Badge of Honour UK Limited | London | 2026 |
| Badgeco Ltd | Belfast | 2025 |
| Badgemaster Group Limited | Newstead | 2014 |
| Badgemaster Limited | Newstead | 1992 |
| Badger Ales Limited | Dorset | 1974 |
| Badger and FOX Jewellers Limited | Fareham | 2025 |
| Badger Anodising (Birmingham) Limited | Birmingham | 1985 |
| Badger Beard Games Ltd | Tonbridge | 2025 |
| Badger Brand Assemblies Ltd | Cardiff | 2020 |
| Badger Converters Limited | East Bergholt | 1974 |
| Badger Dampers Limited | Halesowen | 2022 |
| Badger Energy Limited | Manchester | 2021 |
| Badger Fabrications Ltd | Halesowen | 2024 |
| Badger Media Ltd | Basingstoke | 2016 |
| Badger Perrow Ltd | Guisborough | 2014 |
| Badger Print Southern Ltd | Henfield | 2014 |
| Badgers Artisan Foods Limited | St. Neots | 2017 |
| Badgerworx 3D Printing Ltd | Newcastle Emlyn | 2025 |
| Badges Limited | Peterborough | 2007 |
| Badges Plus (UK) Limited | Birmingham | 2013 |
| Badges Plus Limited | Birmingham | 1976 |
| Badgeworld Limited | Horncastle | 2013 |
| Badguy Brand Ltd. | Glasgow | 2015 |
| Badgyalmerch Limited | London | 2017 |
| Badhu Builder Ltd | Ilford | 2018 |
| Badiani Limited | London | 2014 |
| Badlab Developments Ltd | London | 2026 |
| Badlees Brewing Limited | Sheerness | 2025 |
| Badley Baked Ltd | Birmingham | 2023 |
| Badminton Horseboxes Ltd | Badminton | 1994 |
| Badoi Logistics Ltd | Milton Keynes | 2026 |
| Badom Ltd | Broxbourne | 2024 |
| Badomato Ltd | Cambridge | 2024 |
| Badon Composites Limited | Bordon | 2017 |
| Badr Airlines (UK) Branch Ltd | London | 2024 |
| Badran Bakery Ltd | Bradford | 2020 |
| Badu.Pl Ltd | Leicester | 2017 |
| Badukweld Ltd | Aberdeen | 2018 |
| Badulet Engineering Ltd Limited | Reading | 2025 |
| Badvo Distillery Limited | Pitlochry | 2017 |
| BAE Geso Systems Ltd. | Beckenham | 2021 |
| BAE London Limited | London | 2026 |