| Bright White Cleaning Ltd | Administrative & support | 2014 |
| Brighter Tutor Limited | Information & communication | 2020 |
| Brin Solutions Ltd | Education | 2012 |
| Brineflow Limited | Manufacturing | 2011 |
| Bristo Offshore Ltd | Mining & quarrying | 2015 |
| Britannia Build Ltd | Construction | 2024 |
| British Metal Treatments Limited | Manufacturing | 1958 |
| British Superkart Racing Club Limited | Arts & recreation | 1989 |
| Britl Inspection & Testing Ltd | Professional & scientific | 2023 |
| Broad ROW Store Ltd | Wholesale & retail | 2021 |
| Broadland Carriages Ltd | Arts & recreation | 2018 |
| Broadland Leisure Limited | Hospitality | 2020 |
| Broadland Model Railway Club Ltd | Professional & scientific | 2013 |
| Broadland Scaffolding Norfolk Ltd | Construction | 2025 |
| Broadland Self Storage Ltd | Real estate | 2023 |
| Broads Sailing Holidays Ltd | Arts & recreation | 2019 |
| Broadscape East Limited | Administrative & support | 2021 |
| Broadside Chippy LLP | | 2025 |
| Broadway Bella's Limited | Arts & recreation | 2021 |
| Broker Business Limited | Wholesale & retail | 2019 |
| Brondswill Estates Limited | Real estate | 1947 |
| Brother Butchery Ltd | Manufacturing | 2024 |
| Brown and Flaxman Limited | Construction | 1996 |
| Browston Instruments Limited | Manufacturing | 2015 |
| Bruce GAS Solutions Limited | Construction | 2025 |
| Brundish & SON Ltd | Other services | 2013 |
| Brwa Retail Ltd | Wholesale & retail | 2026 |
| BS Takeaway Ltd | Hospitality | 2024 |
| BTB Windscreens Ltd | Wholesale & retail | 2019 |
| Buckworth's Garage Limited | Wholesale & retail | 2005 |
| Buddy GY Ltd | Wholesale & retail | 2025 |
| Budges.Bargains Ltd | Wholesale & retail | 2022 |
| BUILD2 Group Ltd | Construction | 2026 |
| Buildandprosper.Com Limited | Manufacturing | 2009 |
| Builders Brothers Group Ltd | Construction | 2019 |
| Building Homes Ltd | Real estate | 2024 |
| Buizer Family Eyecare Ltd | Health & social care | 1956 |
| Bullet Proof Beds Ltd | Administrative & support | 2017 |
| Bulrush Homes Limited | Construction | 2017 |
| Bungay House Ltd | Extraterritorial | 2003 |
| Bure Construction Ltd | Construction | 2023 |
| Bureside Holiday Park Limited | Arts & recreation | 2012 |
| Burger Star Ltd | Other services | 2019 |
| Burgh Castle Community Service Ltd. | Health & social care | 2018 |
| Burgh Hall Functions Ltd | Hospitality | 2019 |
| Burgh Hall Holdings Ltd | Administrative & support | 2022 |
| Burgh Hall Ltd | Hospitality | 2019 |
| Burgh Homes Limited | Construction | 2016 |
| Burgh House Residential Care Home Limited | Health & social care | 1999 |
| Burgis Offshore Ltd | Construction | 2023 |
| Burlington Hotel Holdings Limited | Extraterritorial | 2017 |
| Burlington Hotel Properties Limited | Extraterritorial | 2017 |
| Burlington Hotel(Gt.Yarmouth)Limited | Hospitality | 1961 |
| Burnley Hall Farms Limited | Extraterritorial | 2016 |
| Bursar Services for Schools Ltd | Administrative & support | 2012 |
| Burton Events Group Ltd | Administrative & support | 2026 |
| Bury Bowl Limited | Arts & recreation | 2000 |
| Business World Travel Limited | Administrative & support | 1989 |
| Businesshub Systems Limited | Professional & scientific | 2011 |
| Butcher & Farmers Ltd | Wholesale & retail | 2025 |
| Butchers Brew Limited | Wholesale & retail | 2025 |
| Butchers Burger Bar Ltd | Hospitality | 2026 |
| Butterfield Properties (Suffolk) Ltd | Administrative & support | 2018 |
| Buxton Services Limited | Other services | 2016 |
| BVG PVT Ltd | Wholesale & retail | 2025 |
| Bycroft (Gorleston) Limited | Real estate | 2023 |
| BYS Day Centre Limited | Health & social care | 2025 |
| Bystone Ventures Limited | Real estate | 2022 |
| Bzuk Ltd | Extraterritorial | 2007 |
| C & C Investment & Property Holdings Limited | Financial services | 2019 |
| C & C Properties Beccles Ltd | Extraterritorial | 2024 |
| C and D Building and Groundworks Ltd | Construction | 2026 |
| C B O Scaffolding Ltd | Construction | 2026 |
| C J Malcolm Builders Limited | Construction | 2015 |
| C J Opticians Caister Ltd | Wholesale & retail | 2026 |
| C J Plastering & Tiling Ltd | Construction | 2017 |
| C K Precision Engineering Limited | Manufacturing | 2000 |
| C Morris Consulting Ltd | Professional & scientific | 2018 |
| C P Edwards Limited | Construction | 2019 |
| C R Levers Plumbing & Heating Ltd | Construction | 2021 |
| C&R Formation Evaluation Limited | Administrative & support | 2016 |
| C&T Holdings Limited | Professional & scientific | 2015 |
| C-Star Holdings Limited | Real estate | 2015 |
| C. Varle Haulage Limited | | 1990 |
| C.A.Design Services Limited | Information & communication | 1981 |
| C.B.H.Services Ltd | Mining & quarrying | 2005 |
| C.E.L Developments Ltd | Construction | 2023 |
| C.J.S Enterprises Limited | Construction | 2007 |
| C.K 3468 Limited | Hospitality | 2024 |
| C.Long Ltd | Professional & scientific | 2003 |
| C.Moore Plumbing & Heating Limited | Construction | 2006 |
| Caded Ltd | Wholesale & retail | 2011 |
| Caeleste Limited | Information & communication | 2016 |
| Caesura Credit Management Limited | Administrative & support | 2012 |
| Cafe Vault Limited | Hospitality | 2023 |
| CAFE63 Limited | Hospitality | 2017 |
| Cain Joinery Limited | Construction | 2025 |
| Caister Barber Limited | Other services | 2023 |
| Caister Building and Roofing Limited | Construction | 2009 |
| Caister Business Park Ltd | Real estate | 2003 |