| BFG Together Ltd | Health & social care | 2019 |
| Bfg-Bargainsforgoods Ltd | Wholesale & retail | 2025 |
| BFP (Corporate Trustee) Limited | Wholesale & retail | 2015 |
| BFP 2015 Limited | Wholesale & retail | 2015 |
| BFY Carbon Strategies Limited | Professional & scientific | 2023 |
| BFY ESG (Operations) Limited | Professional & scientific | 2022 |
| BFY Group Limited | Information & communication | 2004 |
| BFY Trustees Limited | Administrative & support | 2025 |
| BG Design Solutions Ltd | Wholesale & retail | 2010 |
| BG Investment Group Ltd | Real estate | 2021 |
| BG Living Limited | Financial services | 2022 |
| BG Removals & Storage Ltd | Transport & logistics | 2017 |
| BGM Fencing Limited | Construction | 2023 |
| BGM Landscapes Ltd | Administrative & support | 2020 |
| BGS Properties Limited | Real estate | 2018 |
| BH-001-17 Ltd | Real estate | 2024 |
| BHA Homes Limited | Real estate | 2026 |
| BHA Property Management Ltd | Real estate | 2023 |
| Bhagirathi Ltd | Health & social care | 2020 |
| Bhagya Locums Ltd | Health & social care | 2013 |
| Bhandal Law Limited | Professional & scientific | 2014 |
| Bharathi Logistics Limited | Transport & logistics | 2024 |
| Bhatia Best Limited | Professional & scientific | 2010 |
| Bhatti & Bhattbhatt Solicitors Ltd | Professional & scientific | 2023 |
| Bhatti Ventures Ltd | Financial services | 2025 |
| Bhavana L DAS Limited | Health & social care | 2024 |
| Bhcf - ADM Properties Limited | Education | 2022 |
| BHCF2 Limited | Education | 2013 |
| BHCF3 Limited | Education | 2022 |
| BHCF4 Limited | Financial services | 2024 |
| Bhcollections Ltd | Wholesale & retail | 2023 |
| Bhisop Ltd | Hospitality | 2025 |
| BHK Electrical Limited | Construction | 2016 |
| BHM Consultants Limited | Financial services | 2013 |
| BHM Trading Limited | Hospitality | 2026 |
| Bhogal Pharma Ltd | Professional & scientific | 2026 |
| Bhola Foods Ltd | Hospitality | 2020 |
| Bhomescent Ltd | Wholesale & retail | 2023 |
| Bhpa Limited | Real estate | 2011 |
| Bhumesh Ltd | Wholesale & retail | 2023 |
| Bhwb Estates Limited | Real estate | 2022 |
| Bhya Properties Ltd | Real estate | 2026 |
| BI Cubesmart UK Limited | Information & communication | 2014 |
| Bia&Alia Green Ltd | Transport & logistics | 2020 |
| Bibasell Limited | Information & communication | 2025 |
| Bibbles (Bandana Bibs) Limited | Manufacturing | 2011 |
| Bibi AOR Ltd | Manufacturing | 2026 |
| Bibi Art of Repair Limited | Other services | 2024 |
| Bibus Trans Ltd | Transport & logistics | 2019 |
| Bice Consulting Limited | Manufacturing | 2020 |
| Bicep Investments Limited | Real estate | 2023 |
| Bicester V.E. Limited | Other services | 1999 |
| Bickenhall Ltd | Administrative & support | 2022 |
| Bicolano Medical Limited | Health & social care | 2022 |
| Bicrown Developments Limited | Extraterritorial | 2014 |
| Bicultural Films Limited | Transport & logistics | 2024 |
| BID Consultancy Ltd | Other services | 2025 |
| Bidbreaks Limited | Hospitality | 2024 |
| Biddlelad Ltd | Information & communication | 2020 |
| Bide Consulting Ltd | Professional & scientific | 2023 |
| Bierkeller Worcester Ltd | Hospitality | 2020 |
| Bieteseb Plus Property Ltd | Real estate | 2025 |
| Bifolding Doors 4 U Ltd | Manufacturing | 2013 |
| Big & Small Fencing Limited | Construction | 2021 |
| Big & Small Landscaping Limited | Administrative & support | 2021 |
| Big Appetite Illustration Ltd | Professional & scientific | 2025 |
| Big Back Cookies Ltd | Manufacturing | 2025 |
| Big BAD Dog Enterprise Ltd | Transport & logistics | 2016 |
| Big Bang (Fireworks) Productions Limited | Wholesale & retail | 1998 |
| Big Bang Catering Ltd | Hospitality | 2019 |
| Big Bang Events Ltd | Other services | 2019 |
| Big Bang Fireworks Limited | Wholesale & retail | 2004 |
| Big Bear Doggy Day Care & Home Boarding Ltd | Agriculture & fishing | 2023 |
| Big Boom Sound Limited | Information & communication | 2005 |
| Big BRO Budget Ltd | Information & communication | 2025 |
| Big City Packaging Limited | Administrative & support | 2017 |
| Big City Print Ltd | Manufacturing | 2011 |
| Big City Tyres (Nottingham) Limited | Transport & logistics | 2001 |
| Big Data Specialists Ltd | Information & communication | 2024 |
| Big Dogs PUB & Kitchen Ltd | Hospitality | 2019 |
| Big Fish Schoolwear Limited | Wholesale & retail | 2017 |
| Big Fish Ventures Ltd | Financial services | 2023 |
| Big Hand Brewing Company Limited | Manufacturing | 2012 |
| Big J Food Concepts Limited | Manufacturing | 2024 |
| Big Little House Ltd | Real estate | 2025 |
| Big MAK Nottingham Ltd | Hospitality | 2021 |
| Big Media Group Ltd | Information & communication | 2026 |
| Big Melt Ltd | Manufacturing | 2017 |
| Big Old House Developments Limited | Real estate | 2023 |
| Big Old House Limited | Professional & scientific | 2017 |
| Big Oval Plate Ltd | Arts & recreation | 2020 |
| Big Puns Limited | Arts & recreation | 2023 |
| Big Rami Ltd | Administrative & support | 2022 |
| Big Response Ltd | Real estate | 2013 |
| Big Rock Marketing Limited | Professional & scientific | 2013 |
| Big Rocks Coaching and Consultancy Ltd | Professional & scientific | 2023 |
| Big Rollerz Ltd | Wholesale & retail | 2025 |
| Big Sky Company Limited | Arts & recreation | 1995 |
| Big Sky Fine Art Limited | Wholesale & retail | 2010 |
| Big Stack Catering Ltd | Hospitality | 2025 |