| Big-Pig (Agricultural) Limited | | 1984 |
| Bigahmed YAK Limited | Wholesale & retail | 2021 |
| Bigdreamers UK Ltd | Wholesale & retail | 2026 |
| Bigfunner Ltd | Manufacturing | 2026 |
| Bigfurnituregroup Ltd | Information & communication | 2005 |
| Bigg Hands Limited | Construction | 2005 |
| Bigger Splash Ltd | Professional & scientific | 2023 |
| Biggie Smiles Limited | Health & social care | 2021 |
| Biggy's Food Ltd | Hospitality | 2025 |
| Biggys Ltd | Hospitality | 2020 |
| Bighouse Carers Ltd | Health & social care | 2023 |
| Bigleagues Group Ltd | Information & communication | 2026 |
| Biglo Art Limited | Extraterritorial | 2023 |
| Bigmammafood Limited | Hospitality | 2025 |
| Bigmove Radio CIC | Information & communication | 2025 |
| Bigorange Services Ltd | Hospitality | 2024 |
| Bigsam Dynasty Ltd | Real estate | 2020 |
| Bigsam Global Logistics Ltd | Transport & logistics | 2020 |
| Bigsam Properties Ltd | Real estate | 2024 |
| Bigsam Travels and Tours Ltd | Administrative & support | 2023 |
| Bigshout (UK) Limited | Wholesale & retail | 2013 |
| Bigss Ltd | Real estate | 2025 |
| Bigstuff Clothing Ltd | Wholesale & retail | 2019 |
| Bigwhisky Ltd | Wholesale & retail | 2023 |
| Bihaim Emporium Ltd | Wholesale & retail | 2024 |
| Bihux Ltd | Wholesale & retail | 2026 |
| Bijou Cat Co Ltd | Wholesale & retail | 2025 |
| Bijou Diamond Jewellery Ltd | Other services | 2012 |
| Bijou Homestay Ltd | Hospitality | 2023 |
| Bijou Superhost Ltd | Households | 2023 |
| Bike IT Walk IT C.I.C. | Manufacturing | 2024 |
| Bike N Hound Limited | Hospitality | 2026 |
| Bike Where YOU Like Ltd | Arts & recreation | 2018 |
| Bikecation Limited | Administrative & support | 2011 |
| Bikers Hangout Ltd | Information & communication | 2021 |
| Bikesh Health Ltd | Health & social care | 2021 |
| Bikram NOW Ltd | Information & communication | 2025 |
| Biladi Group Ltd | Manufacturing | 2025 |
| Bilal Lubricant Enterprise Ltd | Wholesale & retail | 2025 |
| Bilal Rasheed Ltd | Wholesale & retail | 2024 |
| Bilal S & Sons Limited | Wholesale & retail | 2025 |
| Bilal Superstore Ltd | Wholesale & retail | 2022 |
| Bilal Trading Ltd | Wholesale & retail | 2018 |
| Bilal.M Ltd | Health & social care | 2024 |
| Bilibalabi Limited | Households | 2021 |
| Bill Elms Associates Limited | Professional & scientific | 2008 |
| Bill Elms Productions Limited | Arts & recreation | 2017 |
| Bill Gosling Outsourcing Limited | Administrative & support | 1970 |
| Bill Gosling Outsourcing UK Limited | Information & communication | 2016 |
| Bill Tours Limited | Professional & scientific | 2025 |
| Billbuddy Limited | Administrative & support | 2018 |
| Billerud GB Limited | Wholesale & retail | 1981 |
| Billi Shop Ltd | Wholesale & retail | 2025 |
| Billi's Hype Store Ltd | Wholesale & retail | 2022 |
| Billion FM Limited | Wholesale & retail | 2022 |
| Billionaire Barbers Ltd | Other services | 2022 |
| Billionbuy Ltd | Wholesale & retail | 2025 |
| Bills GH Ltd | Hospitality | 2025 |
| Bills Paid Limited | Real estate | 2013 |
| Billy & Andy's Music School CIC | Education | 2018 |
| Billy Barnes Gardens Ltd | Administrative & support | 2024 |
| Billy Clothing MCR Ltd | Manufacturing | 2025 |
| Billy's Burgers and Shakes Limited | Hospitality | 2020 |
| Billy's Fireworks Ltd | Other services | 2021 |
| Billyash Ltd | Information & communication | 2025 |
| Billyhill Ltd | Professional & scientific | 1999 |
| Billz Furnishing Supplies Ltd | Wholesale & retail | 2022 |
| Billzo Motors Ltd | Wholesale & retail | 2022 |
| Bilot Engineering Limited | Construction | 2016 |
| Bilot Property Development Limited | Real estate | 2021 |
| Bilspoke Ltd | Manufacturing | 2026 |
| BIM Sync Ltd | Information & communication | 2022 |
| BIM Tech Engineering Limited | Construction | 2015 |
| Bimbol International Ltd | Construction | 2016 |
| Bimbox Associates Limited | Professional & scientific | 2013 |
| Bimfolio Ltd | Professional & scientific | 2025 |
| Bimtech Holdings Limited | Financial services | 2021 |
| Bimtech Media Limited | Professional & scientific | 2021 |
| Bimtech Solutions Limited | Professional & scientific | 2016 |
| Bimtok Limited | Real estate | 2019 |
| Bimz Lounge Limited | Hospitality | 2024 |
| Bimzy Services Limited | Wholesale & retail | 2025 |
| BIN Alrashedi for Trading Ltd | Wholesale & retail | 2025 |
| BIN Aziz Limited | Wholesale & retail | 2025 |
| BIN Salaam Cargo Ltd | Transport & logistics | 2021 |
| BIN TAJ Associates Limited | Wholesale & retail | 2023 |
| BIN TAJ Enterprises Ltd | Wholesale & retail | 2025 |
| Bina Fashion Limited | Manufacturing | 2018 |
| Binari Wholesale Limited | Hospitality | 2023 |
| Binary Healthcare Limited | Information & communication | 1996 |
| Binary Intellect Ltd | Information & communication | 2020 |
| Binary Promotions Limited | Arts & recreation | 2019 |
| Binary Pursuits Ltd | Financial services | 2022 |
| Binas Solicitors Ltd | Professional & scientific | 2013 |
| Binas Yisachar | Other services | 2024 |
| Bina’S Buildings Ltd | Real estate | 2021 |
| Binchat Technology Ltd | Information & communication | 2023 |
| Binder Independent Services Limited | Real estate | 2014 |
| Bindiya Ltd | Wholesale & retail | 2015 |
| Bindra Traders Limited | Wholesale & retail | 2025 |