| Bath Street Boxes Limited | Walsall | 1991 |
| Bath Stuff Limited | Surbiton | 2023 |
| Bath TAP Buddy Ltd | Manchester | 2023 |
| Bath-A-Licious Limited | Ballymoney | 2024 |
| Bath-Lift Limited | Stoke-On-Trent | 2000 |
| Bathams (Delph) Limited | West Midlands | 1980 |
| Bathe in Safety Limited | Uckfield | 2014 |
| Batheaston Cabinet Makers Limited | West Yorkshire | 2003 |
| Bathex (Bathroom & Accessories) Limited | Birmingham | 1977 |
| Bathford Joinery Limited | Bath | 2021 |
| Bathgate Auto Services Ltd | Bathgate | 2015 |
| Bathgate Flooring Limited | Liverpool | 2004 |
| Bathgate Slate Technologies Limited | Liverpool | 2004 |
| Bathing Beauty Ltd | Denbigh | 2015 |
| Batho Sports Cars Ltd | Hinckley | 2016 |
| Bathroom Supplies Ltd | Bolton | 2026 |
| Bathrooms Direct NE Limited | London | 2022 |
| Bathrooms Kitchens Ltd | Harrow | 2023 |
| Bathrooms Select Limited | Hockley | 1998 |
| Bathrooms World Ltd | London | 2025 |
| Bathtime Buddy Ltd | Stockport | 2024 |
| Batimet UK Limited | London | 2014 |
| Batis Ceramics Ltd | Edinburgh | 2024 |
| Batista Handyman Service Ltd | Woking | 2024 |
| Batley & Robinson(Worsteds)Limited | Harrogate | 1950 |
| Batley Beds Ltd | Batley | 2025 |
| Batley Carr Beds Ltd | Dewsbury | 2013 |
| Batley Fabrications Limited | Batley | 2010 |
| Batley Foundry Limited | North Lincolnshire | 1964 |
| Batley Moulds Ltd | Batley | 2009 |
| Batorer Limited | Bradford Road Cleckheaton | 1974 |
| Batri Cells Limited | London | 2024 |
| Batri Limited | Bridgend | 2020 |
| Batri Materials Limited | London | 2024 |
| Batribike Limited | Lincoln | 2017 |
| Batricar Mobility Centre Limited | Wimborne | 2003 |
| Batronics Limited | Bury St. Edmunds | 2025 |
| Bats Publications Ltd. | Spalding | 2017 |
| Batsford SAW Mills and Timber Limited | Frome | 1997 |
| Batsford Timber Limited | Frome | 1994 |
| Batson Clothing Ltd | London | 2020 |
| Batt Brothers Carpentry & Building Services Ltd | Grays | 2024 |
| Batt Sails Limited | Fareham | 2002 |
| Batt Wrapz Limited | Goytre, Near Pontypool | 2025 |
| Batt-Boxes Ltd | London | 2025 |
| Batt-Re Microgrid Systems Ltd | Brighouse | 2023 |
| Battaglia Marble & Granite Ltd. | Huddersfield | 2003 |
| Battals Baklava & Patisserie Limited | Birmingham | 2010 |
| Battcave Ltd | Yateley | 2026 |
| Batten and Allen International Limited | Cirencester | 1997 |
| Batten and Allen Limited | Cirencester | 1972 |
| Battenfeld Gloucester Europe Limited | Milton Keynes | 1968 |
| Batter and Splatter Ltd | Watford | 2020 |
| Batteries 4 U Limited | Bishop'S Stortford | 2019 |
| Batteries and Solar Ltd | Plymouth | 2016 |
| Batteries Plus Limited | Hartley | 2000 |
| Battersea Cooling Station Ltd | London | 2023 |
| Battersea Tailor Ltd | London | 2024 |
| Battery Bear Ltd | Dundee | 2026 |
| Battery Covers Ltd | Painswick | 2025 |
| Battery Examination Services & Training Limited | Telford | 2016 |
| Battery MAN (Yorkshire) Limited | West Yorkshire | 2005 |
| Battery Minerals Ltd | Norwich | 2024 |
| Battery Power Technology Ltd | County Durham | 2003 |
| Battery Safe Solutions Ltd | Stockport | 2025 |
| Battery Service & Components Limited | Northampton | 2021 |
| Battery Technologies UK Limited | Bristol | 2013 |
| Battery Terotech Limited | Aberdeen | 2000 |
| Batteryware Limited | Solihull | 2019 |
| Battilori Limited | London | 2025 |
| Battison Joinery Ltd | Perth | 2025 |
| Battistoni Ltd | London | 2021 |
| Battle BAG Limited | Ashford | 2018 |
| Battle Bakes and Cakes Ltd | St. Leonards-On-Sea | 2018 |
| Battle Borne Tactical Ltd | Surrey | 2026 |
| Battle Bounce Bass Limited | Bognor Regis | 2023 |
| Battle Grid Workshop Ltd | London | 2026 |
| Battle Heritage Ltd | Worthing | 2017 |
| Battle Honours 3D Limited | Deal | 2022 |
| Battle Horse Ltd | Aberystwyth | 2021 |
| Battle Krabz Ltd | Ruislip, | 2023 |
| Battle Wardrobe Ltd | Wallingford | 2015 |
| Battle-Gibbs Engineering Ltd | Andover | 2023 |
| Battlebox HQ Ltd | Edinburgh | 2017 |
| Battlefield Bakery Ltd | Strathaven | 2014 |
| Battlefield Glass Limited | Shrewsbury | 2016 |
| Battlefield Performance Ltd | Nairn | 2016 |
| Battleforge Miniatures Ltd | Northampton | 2025 |
| Battleforged Wargames Ltd | London | 2025 |
| Battlerigs Media Ltd | Lincoln | 2019 |
| Battles of London Ltd | Exeter | 2016 |
| Battlesoap Ltd | Southampton | 2023 |
| Battley Marine Ltd. | Dereham | 1978 |
| Batts Engineering & Fabrications Limited | Rotherham | 2000 |
| Batts Hill Distillers Ltd | Redhill | 2020 |
| Baty International Limited | Sheffield | 1943 |
| Bau&Miao Ltd | London | 2025 |
| Baudet Pods Limited | Shipley | 2012 |
| Baudouin UK Ltd | Broadstairs | 2020 |
| Bauer Coatings & Inspection Ltd | Dingwall | 2020 |