| Bilt Investment Limited | London | 2025 |
| Bilthoven Holding Limited | London | 2024 |
| Bilton & Johnson Holdings Limited | Brentwood | 2022 |
| Biltron Global UK Ltd | London | 2025 |
| Bilway Holdings Limited | Stockport | 2018 |
| BIM08 Ltd | London | 2024 |
| Bima Holdings Limited | Watford | 2021 |
| Bimass Consultancy Ltd | London | 2026 |
| Bimeh Iran Insurance Company (U.K.) Limited | | 1975 |
| Bimg Limited | Suffolk | 2014 |
| Bimpy Ltd | London | 2011 |
| Bimtech Holdings Limited | Manchester | 2021 |
| BIN Sinai Leisure Group Limited | Borehamwood | 2022 |
| Bina Holding Ltd | Berkhamsted | 2024 |
| Binance Markets Limited | London | 2015 |
| Binario Invest Ltd | London | 2026 |
| Binary Bay Ltd | Glasgow | 2022 |
| Binary Capital Limited | London | 2008 |
| Binary Intellect Holdings Ltd | Salford | 2024 |
| Binary Investments Ltd | Reading | 2018 |
| Binary Pursuits Ltd | Manchester | 2022 |
| Binary Star Digital Limited | Knutsford | 2025 |
| Bincap Investments Unltd | Barnet | 2016 |
| Bind-A-Tex Holdings Limited | Chorley | 2020 |
| Bindefeld Holdings Limited | Derby | 2018 |
| Binder Holdco Limited | Eastleigh | 2016 |
| Binderholz UK Group Limited | Carlisle | 2019 |
| Bindfare Limited | London | 1994 |
| Bindi Holdings Limited | Stanmore | 2020 |
| Bindiya Patel Limited | Derby | 2020 |
| Bindle Corp Ltd | London | 2025 |
| Binfield Insurance Brokers Ltd | Teignmouth | 2000 |
| Bing Capital Limited | London | 2014 |
| Bing Capital Partners Ltd | London | 2021 |
| Bing Metering Co. Ltd | Bracknell | 2024 |
| Bingcliff Limited | Burton Upon Trent | 1972 |
| Bingham Holdings Limited | Nuneaton | 2025 |
| Bingham-Woods Independent Financial Advisors Limited | Spalding | 2006 |
| Binghams OFF Market Ltd | Brighton | 2019 |
| Bingley Investment & Leasing Limited | Shipley | 1998 |
| Bingo Holdings Ltd | Bournemouth | 2022 |
| Bingwa Ltd | Tottenham | 2018 |
| Binham Investments Limited | Bath | 2025 |
| Binjai Investments Limited | Maidstone | 2017 |
| Bink PAY Ltd | London | 2022 |
| Binkei Dentistry Limited | Cheltenham | 2021 |
| Binkil Holdings Limited | Newcastle Upon Tyne | 2025 |
| Binks Property Holdings Limited | Northallerton | 2016 |
| Binkulis Enterprises Limited | Warrington | 2026 |
| Binkybonk Limited | Chichester | 2021 |
| Binnie Holding Company Ltd | Dartford | 2025 |
| Binning & Binning Limited | Hook | 2018 |
| Binning Group Holdings Ltd | Coventry | 2024 |
| Binnington Finance Limited | York | 2024 |
| Binns Group Limited | Potters Bar | 2022 |
| Binny Trading Ltd | Woking | 2025 |
| Binocle Accounting Limited | London | 2025 |
| Binocle Limited | Brighton | 2018 |
| Binomial Group Limited | Dorking | 1998 |
| Binq Business Limited | London | 2025 |
| Binstock Family Holdings Ltd | London | 2025 |
| Binta Limited | Staffordshire | 2002 |
| Bintang Enterprise Ltd | Aberdeen | 2025 |
| Binum Limited | London | 2015 |
| Binvank Markets Limited | Ruislip | 2022 |
| BIO Capital 2 Ltd | Buntingford | 2020 |
| BIO Capital Finance Limited | Buntingford | 2020 |
| BIO Capital Holdings Limited | Buntingford | 2020 |
| BIO Capital Ltd | Buntingford | 2018 |
| BIO Clean Systems Limited | Horsham | 2018 |
| BIO Diverse Management Ltd | Fareham | 2023 |
| BIO Energy (UK) Limited | Towcester | 1997 |
| BIO Newco a Limited | London | 2019 |
| BIO Products Laboratory Holdings Limited | Elstree | 2002 |
| BIO Resolutions Limited | Ashford | 2024 |
| BIO Scope 3 Ltd | Bury St Edmunds | 2021 |
| BIO Solutions Group Ltd | Leeds | 2021 |
| Bio-Medical Science & Technology UK Limited | Stowmarket | 2024 |
| BIO4GAS Holding Limited | London | 2022 |
| BIO4GAS Limited | Ipswich | 2022 |
| Bioaccess Group Limited | Chichester | 2024 |
| Bioaccess Holdings Limited | Chichester | 2019 |
| Biobrick Technology & Solutions Ltd | Ilford | 2026 |
| Bioceres Group Limited | Worthing | 2021 |
| Biochain IP Holdings Limited | Louth | 2025 |
| Biocity Hsre-Trinity Holdco Limited | London | 2020 |
| Biocity Hsre-Trinity Nottingham Triangle Limited | London | 2020 |
| Biocity Investments Limited | Nottingham | 2009 |
| Bioco Innovation Limited | Ipswich | 2023 |
| Biocomposites International Limited | Newcastle | 2022 |
| Biocon Biologics International Limited | London | 2016 |
| Bioeden Group Limited | Nottingham | 2008 |
| Bioexcel Limited | London | 2003 |
| Biofarm Group Limited | London | 2026 |
| Bioflex Pharma Ltd | London | 2025 |
| Bioganix (Holdings) Ltd | Brigg | 2019 |
| Biogen EM Holdco Limited | Bedford | 2017 |
| Biogen EM Limited | Bedford | 2017 |
| Biogold UK Limited | London | 2019 |
| Biogreen Technology & Investment UK Group Ltd | Sheffield | 2025 |