| Burton Property Group Ltd | Real estate | 2023 |
| Burwell Hatchery Ltd | Agriculture & fishing | 2006 |
| Burwell Maintenance Limited | Construction | 2007 |
| Burwood Inns Limited | Hospitality | 2017 |
| Bury Newsagent Ltd | Wholesale & retail | 2020 |
| BUS Times Ltd | Information & communication | 2022 |
| Bush Enterprises Ltd | Information & communication | 2025 |
| Bush Group Limited | Construction | 1986 |
| Business Direct Consultancy Limited | Professional & scientific | 2008 |
| Business Equip Limited | Professional & scientific | 2012 |
| Business Growth Machines Limited | Administrative & support | 2024 |
| Business Industry Publishing Ltd | Information & communication | 2021 |
| Business Information Systems Ltd | Information & communication | 2008 |
| Business Information Technology Services Limited | Information & communication | 2022 |
| Business Lifestyle Company Ltd | Professional & scientific | 2020 |
| Business Payments Solutions Ltd | Wholesale & retail | 2024 |
| Business Revolution Enterprise Limited | Administrative & support | 2010 |
| Business Solutions (Quality and Training) Limited | Professional & scientific | 1997 |
| Business Utility Broker Limited | Professional & scientific | 2010 |
| Business Waste Solutions Ltd | Water & waste | 2022 |
| Business Webpage Limited | Information & communication | 2003 |
| Business Writers Limited | Professional & scientific | 2012 |
| Bussell Property Holdings Ltd | Real estate | 2012 |
| Busson Properties Limited | Real estate | 2026 |
| Butcher Group Limited | Real estate | 1942 |
| Butchers Bhoy Limited | Hospitality | 2018 |
| Butler Graveling Ltd. | Professional & scientific | 1998 |
| Butterfly Display Ltd | Administrative & support | 2025 |
| Butterfly Lettings Ltd | Real estate | 2024 |
| Butterworth Jesselton Holdings Limited | Real estate | 2022 |
| Buttinghill Investments Limited | Financial services | 2019 |
| Buttle Group Ltd | Wholesale & retail | 2025 |
| Buxton Beresford Financial Planning Ltd | Financial services | 2011 |
| Buxton Healthcare Ltd | Public administration | 2022 |
| Buxton Lodge Barns Limited | Households | 2011 |
| Buxton Mill Properties Limited | Real estate | 2008 |
| Buxton Recruitment Ltd | Administrative & support | 2015 |
| Buxton Three Two Ltd. | Professional & scientific | 2011 |
| Buy Anything Ltd | Wholesale & retail | 2021 |
| Buy Local Norfolk | Other services | 2007 |
| Buzz-Off Honey BEE Limited | Administrative & support | 2025 |
| Buzz-Off Ltd | Administrative & support | 2020 |
| BV5 Limited | Administrative & support | 2018 |
| BVF Ltd | Arts & recreation | 2024 |
| BW Audit Ltd | Professional & scientific | 2022 |
| BW Heating Services Limited | Construction | 2014 |
| BW Home & Garden Care Ltd | Other services | 2025 |
| BW Industrial Insulation Limited | Construction | 2017 |
| BW L&D Limited | Professional & scientific | 2015 |
| BW Stainless Ltd | Manufacturing | 2012 |
| Bwana Ltd | Manufacturing | 2024 |
| BWG C.I.C. | Information & communication | 2021 |
| BWL Consulting (East) Limited | Professional & scientific | 2021 |
| BWT2023 Limited | Professional & scientific | 2013 |
| Bxco Ltd | Wholesale & retail | 2021 |
| Bxct Partners Limited | Professional & scientific | 2025 |
| Bxestate Ltd | Real estate | 2021 |
| BY BUX Limited | Wholesale & retail | 2024 |
| BY Lyds Limited | Wholesale & retail | 2024 |
| BY Miles Group Ltd | Financial services | 2019 |
| BY Miles Ltd | Administrative & support | 2015 |
| BY Miles Technology Services Ltd | Information & communication | 2019 |
| BY the by Ltd | Financial services | 2022 |
| BY Them Ltd | Financial services | 2022 |
| By.Do Ltd | Hospitality | 2023 |
| Bycaleb Ltd | Real estate | 2017 |
| Bygones Transport Ltd | Transport & logistics | 2025 |
| Bygrave Group Limited | Health & social care | 2023 |
| Bygrave Holdings Ltd | Real estate | 2023 |
| Byra Ltd | Professional & scientific | 2021 |
| Byte Studio Limited | Information & communication | 2017 |
| Byte-Vision Enterprises Limited | Information & communication | 1997 |
| Bytecrackers Limited | Information & communication | 2013 |
| Bytesure Limited | Information & communication | 2006 |
| BYW Limited | Real estate | 2000 |
| Bzee Consulting Limited | Professional & scientific | 2012 |
| C & a Flooring Ltd | Construction | 1998 |
| C & a Properties (Norfolk) Ltd | Real estate | 2016 |
| C & B Property Management Ltd | Real estate | 2017 |
| C & C Norwich Ltd | Wholesale & retail | 2019 |
| C & C Sheet Metal Limited | Manufacturing | 2007 |
| C & D Heating and GAS Services Ltd | Construction | 2024 |
| C & F Holdings Limited | Administrative & support | 2018 |
| C & G Launderettes Limited | Other services | 2021 |
| C & I Hairdressing Limited | Other services | 2018 |
| C & J Carrara Enterprises Limited | Real estate | 1964 |
| C & J Enterprises Ltd | Hospitality | 2017 |
| C & JC Limited | Transport & logistics | 2018 |
| C & N Maclennan Limited | Mining & quarrying | 2013 |
| C & S Bodycare Services Limited | Wholesale & retail | 2002 |
| C & S Cleaners Limited | Agriculture & fishing | 2003 |
| C & S Jamaican Catering Ltd | Hospitality | 2023 |
| C a Slaughter & SON Limited | Real estate | 2023 |
| C a Z Legacy Properties Limited | Real estate | 2025 |
| C Burgess Enterprise Limited | Hospitality | 2025 |
| C C & C Limited | Wholesale & retail | 2003 |
| C Consult Limited | Professional & scientific | 2007 |
| C D Mountney Ltd | Professional & scientific | 2023 |
| C D S Surveys Ltd | Construction | 2011 |
| C E Birch Limited | Financial services | 2013 |