| Bastech Ltd | Wing | 2024 |
| Bastet Noir Ltd | London | 2026 |
| Bastion Coffee Ltd | Blyth | 2023 |
| Bastion Fibre Ltd | London | 2026 |
| Bastion Glassfibre ROD & Sections Limited | Team Valley Trading Estate | 1973 |
| Bastion Meadery Ltd | Cambridge | 2026 |
| Bastion Security Products Ltd. | Church Stretton | 2013 |
| Basvi Group PVT Ltd | London | 2026 |
| Basx Ltd | Sandhurst | 2021 |
| BAT Audio Ltd | London | 2025 |
| BAT Aviation Ltd | Milton Keynes | 2016 |
| BAT Country Brew Co Limited | Romsey | 2020 |
| BAT Design Ltd | London | 2017 |
| BAT Electrical Services Limited | Dundee | 2018 |
| BAT Fabrications Limited | Cannock | 2013 |
| BAT Kave Ltd | London | 2025 |
| BAT Master Ltd | Dagenham | 2025 |
| BAT Powder Coating Limited | Norton Canes | 2023 |
| Bat-Tea Ltd | London | 2025 |
| Bata Shoes Ltd | Rainham | 2025 |
| Batal Core Ltd | London | 2025 |
| Batam Pastry Ltd | Nottingham | 2021 |
| Batbox Limited | Olney | 2003 |
| Batcars Limited | Wigton | 2025 |
| Batch & Peel Ltd | Harrogate | 2026 |
| Batch Bakery Ltd | London | 2024 |
| Batch Bournemouth Ltd | Bournemouth | 2025 |
| Batch Brew Ltd | Burnley | 2011 |
| Batch Brewery Limited | Lyme Regis | 2024 |
| Batch Farm Cheesemakers Limited | Somerest | 2006 |
| Batch Kitchen Limited | Bournemouth | 2025 |
| Batch Semi UK Ltd | St Austell | 2019 |
| Batchable Enterprises Limited | Manchester | 1993 |
| Batched Coffee Roasters Ltd | Glasgow | 2026 |
| Batched Limited | Stowmarket | 2017 |
| Batchelor Engineering Ltd | Derby | 2026 |
| Batchelor Polyurethanes Limited | Birmingham | 1997 |
| Batchelor Resources Limited | Birmingham | 2025 |
| Batchelor Technical Services Limited | Barnet | 2003 |
| Batchelors Patisserie Limited | Margate | 2014 |
| Batches Bakery CIC | Bristol | 2022 |
| Batchflow Engineering Limited | Warwick | 2001 |
| Batchglow Limited | Dinnington | 1981 |
| Batching & Blending Systems Limited | Chatham | 1996 |
| Batchmix Limited | Doncaster | 1990 |
| Batchsafe Ltd | Waltham Abbey | 2026 |
| Batchtech Engineering Ltd | Swanley Village | 2012 |
| Batchw Limited | London | 2017 |
| Bateman & Landa Limited | Basingstoke | 2026 |
| Bateman Thermotooling (NW) Limited | Chorley | 2023 |
| Bateman Thermotooling Limited | Preston | 2007 |
| Batemans Film & Fabrication Ltd | Potters Bar | 2026 |
| Bates Boatyard Limited | Tring | 2012 |
| Bates Body Foods Ltd | Towcester | 2018 |
| Bates Carpentry Contractors Ltd | Wolverhampton | 2019 |
| Bates Composites Ltd | Daventry | 2018 |
| Bates Outdoors Ltd | Lincoln | 2025 |
| Bates Print Engineering Ltd | Bridgwater | 2002 |
| Bates Timber Merchants Limited | Nuneaton | 1994 |
| Bates' Bespoke Ltd | Preston | 2023 |
| Batesify Ltd | Mildenhall | 2025 |
| Bateson Consulting Limited | Diss | 2001 |
| Bateson Fabrications Limited | Antrim | 2016 |
| Bateson Trailers Limited | Marple Stockport | 1972 |
| Batesons Bakery Ltd | Castleford | 2005 |
| Batewood Renovations Ltd | Bath | 2022 |
| Batey Metallic Packing Company Limited | Newcastle Upon Tyne | 1920 |
| BATFINK1974 Limited | Hove | 2025 |
| Bath & Bristol Carpentry Ltd | Shepton Mallet | 2023 |
| Bath and Blossom Ltd | London | 2025 |
| Bath and Cotswold Architectural Masonry Limited | Bath | 2000 |
| Bath Aqua Glass Limited | Bristol | 1998 |
| Bath Bags Ltd | Brighton | 2025 |
| Bath Beverages Limited | Hilperton | 2013 |
| Bath Bomb Bliss Ltd | Seaham | 2023 |
| Bath Botanics Limited | Batheaston | 2014 |
| Bath Cast Stone Ltd | Radstock | 2010 |
| Bath Central Garage Ltd | Bath | 2019 |
| Bath Chocolate Company Limited | Bath | 2017 |
| Bath Ciders Limited | St. Austell | 2008 |
| Bath City Joinery Limited | Trowbridge | 2012 |
| Bath Culture House Ltd | Bristol | 2019 |
| Bath Cycle Company Limited | Bath | 2017 |
| Bath Doctor Marine Limited | Omagh | 2019 |
| Bath Electrics Limited | Salisbury | 2017 |
| Bath Honey Boys Limited | Cardiff | 2025 |
| Bath Masonry Ltd | Banbury | 2021 |
| Bath Mate Innovations Ltd | Grays | 2024 |
| Bath Natural Mineral Water Limited | Cheddar | 2006 |
| Bath Natural Spring Water Limited | Cheddar | 2006 |
| Bath Panel Store Ltd | Gillingham | 2013 |
| Bath Potions Ltd | London | 2003 |
| Bath Press Limited | Croydon | 1943 |
| Bath ROW Bottling Company Ltd | Birmingham | 2023 |
| Bath Signs Ltd | Calne | 2019 |
| Bath Slabs Limited | Wells | 2003 |
| Bath Spring Water Limited | Bath | 2025 |
| Bath Stone Direct Ltd | Bath | 2023 |
| Bath Stone Fireplaces Ltd | Corsham | 2018 |
| Bath Stoves Ltd | Bath | 2021 |