| Bidare Group Ltd | Financial services | 2026 |
| Bidbi Holdings Limited | Professional & scientific | 2016 |
| Bien Voyager Travel Limited | Administrative & support | 2026 |
| Bierton Property Limited | Real estate | 2005 |
| Big Agility Services Limited | Information & communication | 2013 |
| Big Arty Productions Limited | Administrative & support | 1996 |
| Big Basket Ltd | Wholesale & retail | 2024 |
| Big Bite Grill Ltd | Hospitality | 2026 |
| Big Blue Frog Ltd | Other services | 2026 |
| Big Brown Dog Trading Limited | Wholesale & retail | 2011 |
| Big Brown Teapot Limited | Wholesale & retail | 2011 |
| Big Daddy's Jordenthorpe Ltd | Hospitality | 2022 |
| Big Daddys AMB Limited | Hospitality | 2020 |
| Big Daddys Fastfood Ltd | Hospitality | 2025 |
| Big Deal Trades Ltd | Professional & scientific | 2025 |
| Big Dream Property Ltd | Households | 2023 |
| Big Ears Music and Design Ltd | Arts & recreation | 2007 |
| Big Filla Ltd | Hospitality | 2017 |
| Big Fish Little Fish Consultancy Services Ltd | Administrative & support | 2013 |
| Big Foodie Limited | Hospitality | 2018 |
| Big Hearts Day Nursery Limited | Health & social care | 2026 |
| Big Ideas of Sheffield Ltd. | Wholesale & retail | 1995 |
| Big Local App Doncaster Limited | Wholesale & retail | 2012 |
| Big MAN Logistics Ltd | Transport & logistics | 2018 |
| Big on Media Limited | Professional & scientific | 2015 |
| Big Picture Financial Planning Ltd | Financial services | 2020 |
| Big Picture Invest Limited | Other services | 2018 |
| Big Popa's Flag Football Ltd | Wholesale & retail | 2024 |
| Big Sams Kitchens Limited | Hospitality | 2023 |
| Big Save International LLP | | 2024 |
| Big Sky Taverns Ltd | Hospitality | 2024 |
| Big Squeeze Solutions Limited | Administrative & support | 2011 |
| Big TIN Ltd | Arts & recreation | 2022 |
| Big Tree Properties Ltd | Real estate | 2024 |
| Big Whistle Ltd | Wholesale & retail | 2021 |
| Big X Limited | Extraterritorial | 2004 |
| Big X Software Ltd | Information & communication | 2016 |
| Bigfoot Ltd | Health & social care | 2023 |
| Biggestdiscount Limited | Wholesale & retail | 2004 |
| Biggles and Bubs Ltd | Hospitality | 2022 |
| Bigh Films Limited | Information & communication | 2025 |
| Bigint Software Limited | Information & communication | 2025 |
| Bigload Tippers Limited | Transport & logistics | 2025 |
| Bigmediumsmall Limited | Arts & recreation | 2020 |
| Bigmoon Entertainment Europe Limited | Information & communication | 2016 |
| Bigmouth Manchester Limited | Real estate | 2016 |
| Bigsheriff Services Ltd | Manufacturing | 2016 |
| Bigtall Apparel Limited | Wholesale & retail | 2017 |
| Bijou Relocation Ltd | Hospitality | 2017 |
| Bike Rehab Ltd | Wholesale & retail | 2013 |
| Bike Revive Ltd | Manufacturing | 2019 |
| Bikers Engineering Limited | Professional & scientific | 2023 |
| Bikki Marketing Limited | Administrative & support | 2009 |
| Biko Empire Barbers Ltd | Other services | 2025 |
| Bilash (Sheffield) Ltd | Hospitality | 2005 |
| Bilham Developments Ltd | Real estate | 2021 |
| Bill ADS Ltd | Information & communication | 2026 |
| Billets Properties Limited | Real estate | 2015 |
| Billiam Services Limited | Construction | 2023 |
| Billian UK Limited | Manufacturing | 2011 |
| Billionaire Luxury Limited | Wholesale & retail | 2022 |
| Billionaire Trader Limited | Information & communication | 2025 |
| Billy BOY Media Limited | Information & communication | 2024 |
| Billy Emergency Plumbing and Drainage Ltd | Construction | 2020 |
| Billy Stone Limited | Wholesale & retail | 2021 |
| Bilo Fresh 1 Ltd | Hospitality | 2023 |
| Bilo's Salads Ltd | Wholesale & retail | 2020 |
| Bilton Design Limited | Professional & scientific | 2006 |
| Bimal Cultural Intelligence Limited | Education | 2019 |
| BIN Alvi Group Ltd | Wholesale & retail | 2024 |
| BIN Amin Ltd | Wholesale & retail | 2022 |
| BIN Ring Company Limited | Professional & scientific | 1998 |
| Bina's Kitchen Ltd | Hospitality | 2023 |
| Bina's Kitchen Manchester Ltd | Hospitality | 2025 |
| Bine Limited | Households | 2019 |
| Bingham & Clarkson Limited | Construction | 2014 |
| Bingham Accountancy Limited | Professional & scientific | 2012 |
| Bingham Construction Limited | Construction | 2023 |
| Bingham Dental Ltd | Health & social care | 2022 |
| Bingham Park Properties Ltd | Real estate | 2021 |
| Bingham Property Management Limited | Real estate | 2025 |
| Binghams Food Limited | Manufacturing | 2007 |
| Bingley Fabrications Limited | Manufacturing | 2004 |
| Bingo Catering Equipment Limited | Wholesale & retail | 2018 |
| Bingo Records Ltd | Information & communication | 2022 |
| Bingol 2019 Limited | Hospitality | 2019 |
| Bingway Limited | Real estate | 2016 |
| Bintah Limited | Health & social care | 2023 |
| BIO 5 Limited | Wholesale & retail | 2021 |
| BIO Vibe Innovation Limited | Professional & scientific | 2025 |
| Bio-Uk Fuels (Sheffield) Limited | Wholesale & retail | 2008 |
| Bioclean Waste & Welfare Management Ltd | Water & waste | 2026 |
| Bioelectric Physiology Ltd | Professional & scientific | 2024 |
| Biogreen Technology & Investment UK Group Ltd | Financial services | 2025 |
| Biohitech Europe Limited | Wholesale & retail | 2015 |
| Biomedge Ltd | Health & social care | 2025 |
| Biopharma Supplies Limited | Professional & scientific | 2018 |
| Biophorum Operations Group Ltd | Professional & scientific | 2009 |
| Bioscape Creations Limited | Construction | 2026 |
| Biotech Innovations Ltd | Financial services | 2023 |