| Brambles Farm (Briston) Ltd | Construction | 2019 |
| Bramblewood Estates Limited | Real estate | 2025 |
| Branch & Bloom Norfolk CIC | Education | 2023 |
| Bread and Breakfast Reepham Ltd | Hospitality | 2023 |
| Breckland Garden & Maintenance Services Ltd | Administrative & support | 2021 |
| Breckland Group Ltd | Construction | 2022 |
| Breckland Homes (Shipdham) Limited | Construction | 2022 |
| Brewster Heating Ltd | Construction | 2024 |
| Brick Kiln Farm Storage Ltd | Transport & logistics | 2024 |
| Bright Maintenance Services Limited | Construction | 2014 |
| Brighter Views Ltd | Construction | 2020 |
| Brightoak Property Limited | Real estate | 2025 |
| Brine & Bronze Ltd | Hospitality | 2026 |
| Britannia Ices Ltd | Wholesale & retail | 2020 |
| Britten Farriery Ltd | Agriculture & fishing | 2019 |
| Broadacre Gardens Limited | Administrative & support | 2016 |
| Broadbent & Dunn Limited | Information & communication | 1990 |
| Broadland Home Interiors Ltd | Wholesale & retail | 2024 |
| Broadside Homes Limited | Real estate | 2024 |
| Brome Treatment Limited | Extraterritorial | 2012 |
| Brookmans Holdings Ltd | Construction | 2020 |
| Brooks Property Developers Ltd | Construction | 2024 |
| Broughton Engineering Ltd | Construction | 2014 |
| Brown's Construction & Engineering Limited | Construction | 2026 |
| Brown's Farming & Agricultural Services Ltd | Agriculture & fishing | 2025 |
| Bucharest European Food Ltd | Hospitality | 2024 |
| Budget Caravans Ltd | Wholesale & retail | 2022 |
| Building Information Box Plus Limited | Public administration | 2022 |
| Buildtec Property Development Limited | Construction | 2016 |
| Bullard Family Limited | Manufacturing | 2019 |
| Bullen Architectural Limited | Professional & scientific | 2018 |
| Butchers Removal & Storage Co. Limited | Other services | 2009 |
| Bvbc Ltd | Real estate | 2017 |
| By.Noo Ceramics Ltd | Manufacturing | 2021 |
| Bylaugh Hall Ltd | Professional & scientific | 2003 |
| Bylaugh Park Ltd | Professional & scientific | 2003 |
| Bylaugh Support Services Ltd | Construction | 2020 |
| C & R Units Limited | Wholesale & retail | 2011 |
| C & S Drewry Ltd | Transport & logistics | 2018 |
| C and B Bathrooms and Kitchens Ltd | Construction | 2022 |
| C B Watts Holdings Limited | Extraterritorial | 2024 |
| C Marsh Builders Ltd | Construction | 2012 |
| C.G. Duffield & SON Ltd | Administrative & support | 2016 |
| C.H.A.Bathrooms Ltd | Construction | 2026 |
| C3 Engineering Limited | Manufacturing | 2001 |
| Cabin Hideaways Limited | Hospitality | 2020 |
| Caddis Logistics Ltd | Administrative & support | 2018 |
| Caddis Technologies Ltd | Professional & scientific | 2018 |
| Calcar Ltd | Professional & scientific | 2015 |
| CAM Fisheries Limited | Manufacturing | 2025 |
| Camberwick Mill Ltd | Hospitality | 2020 |
| Camp Epic Ltd. | Arts & recreation | 2016 |
| Camtrak (UK) Ltd | Professional & scientific | 1998 |
| Canderel Property Limited | Real estate | 2017 |
| Canderel Technical Services Limited | Information & communication | 2016 |
| Canterbury Lets Limited | Real estate | 2011 |
| Capfix Limited | Administrative & support | 2002 |
| Car Magic (Norfolk) Limited | Wholesale & retail | 2004 |
| Cardnest Ltd | Wholesale & retail | 2013 |
| Cargo Move Consultant Ltd | Administrative & support | 2006 |
| Caring First Homecare Ltd | Health & social care | 2011 |
| Caring in Care Limited | Energy | 2009 |
| Carnelian Coaching Consultancy Limited | Administrative & support | 2016 |
| Carpentry by Eric Limited | Wholesale & retail | 2024 |
| Carpsight Ltd | Wholesale & retail | 2021 |
| Carrick Enterprises Limited | Agriculture & fishing | 2022 |
| Carrick Investments Limited | Real estate | 2022 |
| Carter Home Improvements Ltd | Construction | 2026 |
| Castlemeadow Care Limited | Construction | 2011 |
| Castlemeadow Group Holdings Ltd | Real estate | 2008 |
| Castlemeadow Group Trading Limited | Administrative & support | 2023 |
| Castlemeadow Homes (Woodgate Park) Limited | Construction | 2013 |
| Castlemeadow Homes Ltd | Extraterritorial | 2005 |
| Causton Motors Limited | Wholesale & retail | 2013 |
| Cboss Limited | Administrative & support | 2011 |
| CC Creates Ltd | Professional & scientific | 2024 |
| CC1 (Norfolk) Ltd | Education | 2019 |
| CDH Contracting Ltd | Transport & logistics | 2018 |
| CDL Personnel Ltd | Administrative & support | 2021 |
| CEA Consultant Limited | Wholesale & retail | 2026 |
| Cellarboy Projects Ltd | Real estate | 2024 |
| Cellardoor Furniture Limited | Other services | 2015 |
| Cemi Data Ltd | Information & communication | 2025 |
| Cencias Ltd | Financial services | 2025 |
| Central Reactive Maintenance Ltd | Construction | 2024 |
| Ceyhan Catering Ltd | Hospitality | 2019 |
| Chalk & Skinner Limited | Wholesale & retail | 2018 |
| Changing Spaces (UK) Limited | Construction | 2010 |
| Chapel Lane Garage Scarning Limited | Wholesale & retail | 2003 |
| Cherry Tree Developments (EA) Ltd | Construction | 2019 |
| Chessum Communication Limited | Professional & scientific | 2019 |
| China Dynasty 88 Limited | Hospitality | 2021 |
| Chiricea Construction Limited | Construction | 2018 |
| Chris Ball Electrical Ltd | Construction | 2017 |
| Chris Hoven & Sons Ltd | Construction | 2025 |
| Chris Watling Engineering Limited | Wholesale & retail | 2009 |
| Christine H Hardman Ltd | Education | 2013 |
| Chudo Consulting Ltd | Information & communication | 2020 |
| Châteaux Marketing Ltd | Hospitality | 2026 |
| Citium Capital Ltd | Professional & scientific | 2020 |