| Bsefm Limited | Haywards Heath | 2018 |
| BSF Bespoke Counter Tops Ltd | Brentwood | 2018 |
| BSF Design Ltd | Wednesbury | 2023 |
| BSF Solid Surfaces Limited | Brentwood | 1991 |
| BSG Manufacturing Limited | Houston Industrial Estate | 1999 |
| BSH Holdings UK Limited | Malvern | 2019 |
| BSH Welding and Fabrication Limited | Spalding | 2025 |
| BSI Apparel Limited | Kingston Upon Thames | 2023 |
| BSI Elec-N-Mech Limited | Witham | 1995 |
| BSJ Precision Ltd | Nuneaton | 2019 |
| BSJ Rail Services Ltd | Rye | 2014 |
| Bsjr Services Ltd | Morden | 2023 |
| BSK Aluminium Limited | Birmingham | 1994 |
| BSK Engineering Ltd | Dungannon | 2014 |
| BSK Renewables Ltd | London | 2025 |
| BSL Express Spares Limited | Chelmsford | 2015 |
| BSL GAS Technologies Limited | Estate Rochester | 1990 |
| BSL Industries Limited | Birmingham | 2005 |
| BSL Interiors Limited | Glasgow | 2019 |
| BSL Studio Ltd | London | 2012 |
| BSL Technologies Ltd | London | 2014 |
| BSL Technology Limited | Yateley | 2021 |
| Bslr Limited | London | 2017 |
| BSM Hyde Limitec Limited | Hyde | 2024 |
| BSM Stone Conservation & Restoration Ltd | Bath | 2025 |
| Bsmrox Ltd | Pudsey | 2026 |
| Bsnbuildingandcarpentry Ltd | Norwich | 2026 |
| Bsol 2019 Ltd | Benfleet | 2019 |
| Bsolve Limited | Blantyre | 2003 |
| BSP Engineering Limited | Glasgow | 2019 |
| BSP Hydraulics Limited | Normanton | 2002 |
| BSP TEX Ltd | Ipswich | 1923 |
| Bspk Furniture Company Ltd | King'S Lynn | 2026 |
| Bspk Holdings Ltd | Redruth | 2024 |
| Bspke Limited | Colchester | 2023 |
| Bspoke CUP Company Limited | Congleton | 2015 |
| Bsporty Global Ltd | London | 2024 |
| Bsquare Textile Limited | London | 2018 |
| BSR Developments Ltd | Gainsborough | 2024 |
| BSR Pipeline Services Limited | London | 1996 |
| BSS Automation Limited | Bangor | 2022 |
| BSS Enterprise Solution Ltd | Portsmouth | 2023 |
| BSS Examiner Ltd | Nottingham | 2022 |
| BSS LED [R&D] Limited | Altrincham | 2010 |
| BSS Manufacturing Limited | Baldock | 2019 |
| Bssb Design Limited | Bearwood | 2018 |
| Bssq Limited | London | 2024 |
| BST Aviation Services Ltd | Cambridge | 2024 |
| BST Brick Cutting Limited | Bolton | 2021 |
| BST Instruments Ltd | Grimsby | 2026 |
| BST Motoring Limited | Birmingham | 2025 |
| BST Piping Limited | Middlesbrough | 2018 |
| BSU Trading Limited | High Wycombe | 2013 |
| BSW Energy Limited | Dunfermline | 1955 |
| BSW Pallet Supplies Ltd | Walsall | 2013 |
| BSW Projects Ltd | Aldershot | 2023 |
| BSW Sawmills Limited | Dunfermline | 1958 |
| BSW Solutions Ltd | Fraserburgh | 2023 |
| BSW Systems Limited | Llandow | 1984 |
| BSW Timber Limited | Dunfermline | 1988 |
| BSW Timber Solutions Ltd | Stoke On Trent | 1990 |
| BSW Ventilation Ltd | Potters Bar | 2026 |
| BSZ Surgico (UK) Limited | London | 2025 |
| BT Bolting Solutions Ltd | Blyth | 2014 |
| BT Carpentry and Construction Group Limited | Bromley | 2025 |
| BT Carpentry Limited | Bristol | 2022 |
| BT Coatings Ltd | Dingwall | 2025 |
| BT Elec Ltd | Glasgow | 2023 |
| BT Flavours Limited | Prescot | 2025 |
| BT Howl Joinery & Carpentry Limited | Warrington | 2026 |
| BT Marine Components Ltd | Dawlish | 2025 |
| BT Marine Propellers (UK) Limited | Dawlish | 2006 |
| BT Marine Propellers Limited | Dawlish | 2003 |
| BT Plant Services Ltd | Newport | 2015 |
| BT Proweld Ltd | Colchester | 2021 |
| BT Services and Supplies Ltd | Colne | 2019 |
| BT Stone Ltd | London | 2024 |
| BT Wind Repairs Ltd | Jarrow | 2023 |
| Bt&T (Badges, Ties & Trolley Coins) Limited | Birmingham | 2013 |
| BTA Bore UK Ltd | Ruislip, | 2023 |
| BTA Contract Interiors Ltd | London | 2022 |
| BTB (GRP) Limited | Worksop | 2011 |
| BTB Brew Technology (UK) Limited | Worksop | 2003 |
| BTB Exhausts Limited | Daventry | 1983 |
| BTB Installation Services Ltd | Bridgend | 2009 |
| BTB Products Limited | Poole | 2019 |
| BTC Aviation Ltd | Twickenham | 2025 |
| BTC Citadel Limited | Corby | 2022 |
| BTC Fabrications Ltd | Redditch | 2020 |
| BTC Motronics Limited | Colchester | 2005 |
| Btech Ltd | Bristol | 2003 |
| Btechlaboratories (UK) Ltd. | Beaconsfield | 2017 |
| BTF Originals Ltd | London | 2025 |
| BTG Design Services Ltd | Christchurch | 2014 |
| BTH Components Limited | Bedford | 2011 |
| Bths Manufacturing Ltd | Leyland | 2023 |
| BTI Bakes Ltd | Rushden | 2026 |
| BTI Services Limited | Birmingham | 2008 |
| BTK (Norfolk) Ltd | King'S Lynn | 2026 |
| BTK Fabrication Ltd | Darwen | 2026 |