| Bekaert Bradford UK Limited | Bradford | 1907 |
| Beker Studio Limited | London | 2022 |
| Beketo Ltd | Sunbury-On-Thames | 2019 |
| Bekfabs Limited | Pontefract | 2021 |
| Bekiarudis Kebabs Ltd | Bulwell | 2012 |
| Bekim MIF Limited | Redditch | 2024 |
| Bekiri Limited | London | 2022 |
| Beko PLC | Watford | 1989 |
| Beko Technologies Limited | Droitwich | 1988 |
| Bekon NET Limited | Enniskillen | 2014 |
| Bekoz Transport Ticketing Ltd | Pontypridd | 2018 |
| Bekstone UK Limited | Brize Norton | 2017 |
| Bekule UK Ltd | Derby | 2024 |
| Bekunet Ltd | Canterbury | 2019 |
| BEL (NI) Limited | Belfast | 2011 |
| BEL Aire Ltd | Addlestone | 2022 |
| BEL Engineering (UK) Limited | Newcastle Upon Tyne | 2012 |
| BEL Machinery Ltd | Hoyland Common | 2016 |
| BEL Sourire Ltd | Wetherby | 2023 |
| BEL Steel Ltd | Sutton | 2019 |
| BEL Valves Limited | Newcastle Upon Tyne | 1920 |
| Bela Cakes & Desserts Ltd | Rochdale | 2026 |
| Bela Sporting Ltd | London | 2023 |
| Bela's Bakes Ltd | Barking | 2024 |
| Belabreaga Ltd | Dartford | 2024 |
| Belacapitalgroup Ltd | Hastings | 2025 |
| Belay Media Group Ltd | Bury St. Edmunds | 2023 |
| Belay Technologies Limited | London | 2026 |
| Belbakes Limited | London | 2023 |
| Belbal (U.K.) Limited | Kington | 1992 |
| Belbroughton Furniture & Event Hire Limited | Belbroughton | 2023 |
| Belcab UK Ltd | London | 2024 |
| Belcan Test Systems UK Limited | London | 2007 |
| Belchaero Ltd | Waterbeach | 2016 |
| Belcher Engineering Limited | Diss | 1978 |
| Belchers Belting Fences Ltd | 21 Hameldown Close | 2025 |
| Belclere Limited | Oxford | 2024 |
| Belcom Cables Limited | Takeley | 2015 |
| Belcon Precast Limited | Romford | 2018 |
| Beldam Crossley Limited | Bolton | 1914 |
| Belde Ltd | London | 2019 |
| Beldecor Designs Limited | London | 2012 |
| Belden Mexico Enterprises Limited | Suffolk | 2018 |
| Belden UK Limited | Suffolk | 1993 |
| Beldex Limited | Sutton In Ashfield | 1987 |
| Beldi London Limited | Sunderland | 2024 |
| Beldiya Limited | London | 2020 |
| Belerancia Bakes Ltd | Gravesend | 2023 |
| Beley Ltd | Stafford | 2023 |
| Belfairs Print Media Limited | Leigh On Sea | 2016 |
| Belfar Ltd. | West Yorkshire | 1999 |
| Belfast Beard Company Ltd | Larne | 2015 |
| Belfast Bifolds & Aluminium Systems Limited | Antrim | 2021 |
| Belfast Boiler and Heating Services Ltd | Belfast | 2015 |
| Belfast Bookbinding Ltd | Belfast | 2011 |
| Belfast Cables UK Solutions Ltd | London | 2026 |
| Belfast City Sawmills Ltd | Lisburn | 2018 |
| Belfast Coffee Roasters Ltd | Carrickfergus | 2017 |
| Belfast Corporate Interiors Limited | South Croydon | 2012 |
| Belfast Electrical Services Ltd | Newtownabbey | 2025 |
| Belfast Fashion Designs Limited | Belfast | 2018 |
| Belfast Foiling Co Ltd | Newtownabbey | 2012 |
| Belfast Print Ltd | Belfast | 2020 |
| Belfast Print Online Ltd | Belfast | 2019 |
| Belfastit Ltd | Belfast | 2021 |
| Belfield Engineering Limited | Derbyshire | 2005 |
| Belford Handmade Interiors Ltd | Warwick | 2024 |
| Belfry Facade Systems Limited | Peterborough | 2017 |
| Belgian Liema Chemical Group Co., Ltd | London | 2025 |
| Belgian Lion Horse (Europe) Fertilizer Co., Ltd | London | 2024 |
| Belgian Tibo Chemical Group Co., Ltd | London | 2025 |
| Belgian Umico Chemical Group Ltd | Kington | 2025 |
| Belgique Production Limited | London | 2020 |
| Belgium Boschwill Agrochemical Co., Ltd | London | 2024 |
| Belgium Dililian Co., Ltd | London | 2024 |
| Belgium Geste (International) Chemical Co., Ltd. | London | 2026 |
| Belgium Jililian Food Co., Ltd | London | 2025 |
| Belgium Kimda Chemical Industry Co., Ltd. | West Midlands, England | 2025 |
| Belgium Lutes Chemical Co., Ltd | Cambridge | 2025 |
| Belgium Novomatef Group Ltd | London | 2024 |
| Belgium Olendi Chemical Group Co. Ltd | London | 2025 |
| Belgium Services Ltd | Bristol | 2006 |
| Belgrave Glass and Glazing Limited | Leicester | 2003 |
| Belgrave Lighting Ltd | Newton Aycliffe | 2026 |
| Belgrave Project Management Limited | London | 2014 |
| Belgrave Upholstry Ltd | Blackburn | 2021 |
| Belgrave Ventilation Services Ltd | Newcastle Upon Tyne | 2024 |
| Belgravia Carpentry Limited | London | 2021 |
| Belgravia Decor Limited | Sunderland | 1978 |
| Belgravia Diamonds Ltd | London | 2026 |
| Belgravia Distribution Network Limited | Middlesbrough | 2026 |
| Belgravia Jewellers Limited | Harrogate | 2024 |
| Belgravia Lighting Limited | Amersham | 1995 |
| Belgravia Stone Gallery Ltd | York | 2023 |
| Belgravia Stone Ltd | York | 2013 |
| Belgravia Styles Ltd | Burgess Hill | 2024 |
| Belgrove Graphics Limited | Liverpool | 1926 |
| Belhaven Brewery Company Limited | East Lothian | 1944 |
| Belhaven Engineering Ltd. | Lanark | 2011 |
| Belicious Bakes & Treats Ltd | Tilbury | 2025 |