| B M Fashions (Holdings) Limited | Leicester | 1999 |
| B M Jewellery Limited | Welling | 2016 |
| B M Packaging Limited | Huddersfield | 1990 |
| B M Plastic Services Limited | East Ham | 2014 |
| B M Prickett Joinery Ltd | Stratford-Upon-Avon | 2003 |
| B M Prototyping Limited | Cirencester | 2023 |
| B M S Electrical Services Limited | Washington | 2008 |
| B M Steel Fabrications Limited | Newry | 2004 |
| B M Welding & Fabrication (NW) Ltd | Carnforth | 2023 |
| B Marshall Engineering Limited | Cleveland | 2007 |
| B Martin Construction Limited | Barrow-In-Furness | 2020 |
| B Mcelwee Carpentry & Joinery Ltd | Biggleswade | 2022 |
| B Mulford Historic Carpentry Ltd | Poole | 2015 |
| B N Optical Ltd | Ryton | 2013 |
| B Napnest Ltd | Halstead | 2025 |
| B O'Connell Ltd | Coventry | 2019 |
| B ORR Blinds Limited | Glasgow | 2017 |
| B P C Building Products Limited | High Peak | 1977 |
| B P Digital Ltd | Preston | 2018 |
| B P Mobile Welding Services Ltd | Dudley | 2026 |
| B P Rolls (Hull) Limited | Andover | 2008 |
| B P S.Com Ltd | Stoke-On-Trent | 2008 |
| B Pharmaceutical Limited | London | 2025 |
| B Price Mus-Max Specialist Ltd | Walsall | 2019 |
| B Profiled Ltd | Croydon | 2025 |
| B R G Recycling Machinery Limited | Sheffield | 2007 |
| B R K (UK) Limited | Milton Keynes | 2008 |
| B R LE Blond Ltd | Whitby | 2017 |
| B R M Jewel Craft Limited | Holborn | 2017 |
| B R Staffs Group Ltd | Stoke-On-Trent | 2022 |
| B R Ventures Ltd | Fitzrovia | 2023 |
| B R Windows Ltd | Swansea | 2017 |
| B RAW Cakes Ltd | London | 2016 |
| B Rawlings Services Ltd | Ludlow | 2018 |
| B Russell Rail Limited | London | 2024 |
| B S Eaton Limited | Nr Walsall | 1960 |
| B S Glass and Glazing Ltd | Oxford | 2008 |
| B S P Labels Limited | Royston | 2000 |
| B S Polythene Limited | Birmingham | 2010 |
| B S Pump Hire Limited | Slough | 2018 |
| B S Tank Solutions Ltd | Barnsley | 2013 |
| B S W Engineering (U.K.) Limited | Reading | 2000 |
| B Safe Safety Solutions UK Ltd | London | 2024 |
| B Scientific Consultancy Ltd | Gillingham | 2018 |
| B Sidoli & Sons Limited | Gwent | 1963 |
| B Simms Engineering Ltd | Melton Mowbray | 2025 |
| B Sm@Rt Cctv Limited | Wolverhampton | 2004 |
| B Smart Vehicle Repairs Ltd | Taunton | 2019 |
| B Studio Ltd | Burnley | 2025 |
| B Supply Ltd | Lisburn | 2025 |
| B T M Engineering & Fabrication Limited | Snodland | 2016 |
| B T Q Limited | Yate | 1985 |
| B T Seal Electrical Services Ltd | Dartford | 2026 |
| B Tea Limited | Hatfield | 2020 |
| B Thompson Engineering Ltd. | Portsmouth | 2016 |
| B Tomlin & SON Limited | Great Missenden | 2005 |
| B Traylor Carpentry & Roofing Limited | Bucknell | 2023 |
| B V Marine Ltd | Poole | 2023 |
| B V Tools Ltd | London | 2026 |
| B Van-Engel Wind Solutions Ltd | Cowes | 2025 |
| B W B Bespoke Joinery Ltd | Holsworthy | 2026 |
| B W Carpentry & Building Ltd | Norwich | 2025 |
| B W Carpentry (WM) Limited | Walsall | 2026 |
| B W Electronics Limited | Hainault | 2010 |
| B W Fabrications Limited | Bristol | 2008 |
| B W Jigs Ltd | Deal | 2020 |
| B W M Limited | Pontypridd | 1996 |
| B W Machinery Ltd | Leeds | 2013 |
| B W Manufacturing Limited | Bridlington | 2002 |
| B W Technical Moulding Limited | Watton | 2015 |
| B W Wind Turbine Technician Services Ltd | Morpeth | 2023 |
| B White Bakery Ltd | Brighouse | 2025 |
| B White Butchers Ltd | Brighouse | 2025 |
| B Z S Motors Ltd | Cottingham | 2013 |
| B&A Carpentery&Joinery Ltd | Barking | 2023 |
| B&B Design Ltd | London | 2020 |
| B&B Inc Ltd | London | 2025 |
| B&B International Services Ltd | Bishop Auckland | 2021 |
| B&B Mechanical Ltd | Cardiff | 2020 |
| B&B Pallets & SON Ltd | Bristol | 2022 |
| B&B Radical Limited | Beccles | 2014 |
| B&B Refrigeration Limited | Grays | 2021 |
| B&B Timber Limited | Birmingham | 2025 |
| B&B Trading Group Limited | Blackburn | 2015 |
| B&C Ceramics Ltd | Southampton | 2011 |
| B&C Commercial Repairs Ltd | Ipswich | 2025 |
| B&C Woodworks Ltd | Washington | 2025 |
| B&Cco Ltd | London | 2025 |
| B&D Building Solutions Ltd | Doncaster | 2021 |
| B&D Tiling Limited | Leeds | 2025 |
| B&E Cosmetics Organic Ltd | Sheffield | 2026 |
| B&E Exquisite Ltd | Leeds | 2026 |
| B&E FAB Ltd | South Shields | 2025 |
| B&E Tools Limited | Baldock | 2014 |
| B&E-Engineers Ltd | Borehamwood | 2019 |
| B&G Tool Hire Ltd | Colindale | 2015 |
| B&G Upholstery and Embroidery Design Ltd | Felixtowe | 2019 |
| B&H Contractors Limited | Ulverston | 2026 |
| B&H Motors Services Ltd | Huddersfield | 2023 |
| B&H.Pt. Limited | Manchester | 1996 |