| Batcom Ltd | Information & communication | 2010 |
| BB Home Removals Services Ltd | Transport & logistics | 2026 |
| BCH Property Maintenance Limited | Construction | 2024 |
| Beachy Productions Ltd | Information & communication | 2025 |
| Bedrock Mortgages Limited | Administrative & support | 2022 |
| Bellfort Limited | Wholesale & retail | 1991 |
| Beluga Corp Ltd | Administrative & support | 2023 |
| BEN Larter Electrical Solutions Limited | Construction | 2019 |
| Bengerang Investments UK Limited | Information & communication | 2018 |
| Benton Limited | Construction | 2007 |
| Beny Food Ltd | Manufacturing | 2025 |
| Besguard Limited | | 1986 |
| Beyond ANY Limits Ltd | Arts & recreation | 2012 |
| Beyond Conditioning Ltd | Health & social care | 2022 |
| Bian Consulting Ltd | Information & communication | 2016 |
| Big Dog Holdings Limited | Hospitality | 2023 |
| Bilzebub Ltd | Education | 2026 |
| Binavigation Ltd | Information & communication | 2021 |
| Birch Construction EA Ltd | Manufacturing | 2021 |
| Birch Property EA Ltd | Real estate | 2023 |
| Bishopgate Services Limited | Professional & scientific | 2017 |
| Bissell & Partners Limited | Financial services | 2012 |
| Bkrs Holdings Limited | Professional & scientific | 2022 |
| Black Sheep Norfolk Limited | Manufacturing | 2025 |
| Blackstar Creative House Ltd | Information & communication | 2026 |
| Blammo! Ltd | Financial services | 2023 |
| Blue Fish Consultancy Ltd | Information & communication | 2026 |
| Blue HAT Services Limited | Education | 2014 |
| Blue Heron Property Ventures Ltd | Real estate | 2025 |
| Blue Wren Capital Ltd | Information & communication | 2022 |
| Bluespace Media Group Limited | Financial services | 2021 |
| Bluespace Media Limited | Professional & scientific | 2020 |
| BNG Environmental Limited | Professional & scientific | 2025 |
| Boilercare (UK) Limited | Construction | 2002 |
| Bollingsworth Investments Limited | Real estate | 2020 |
| Bolshie Goose Ltd | Extraterritorial | 2022 |
| Boston House (Norwich) Ltd | Hospitality | 2021 |
| Bradman Consultancy Limited | Professional & scientific | 2024 |
| Brand People Scout Ltd | Administrative & support | 2026 |
| Brandlo Ltd | Information & communication | 2023 |
| Breckland Sports and Education C.I.C. | Education | 2026 |
| Bricebakes Limited | Hospitality | 2024 |
| Bricktop Boxing Limited | Manufacturing | 2021 |
| Bridge Loke Property Management Limited | Real estate | 2015 |
| Bridgewood Enterprises Limited | Wholesale & retail | 2024 |
| Brilliant Future Coaching Ltd | Professional & scientific | 2020 |
| British Charollais Sheep Society Limited(The) | Agriculture & fishing | 1977 |
| Broadland Flooring Ltd | Construction | 2003 |
| Brockett Holdings Limited | Construction | 2016 |
| Browick Land Limited | Construction | 2010 |
| Brown & Co (Norwich) Ltd | Professional & scientific | 2000 |
| BTR Automotive Ltd | Wholesale & retail | 2024 |
| Buffy's Brewery Limited | Hospitality | 2002 |
| BUN Box (Norwich) Ltd | Hospitality | 2022 |
| Bunwell Management Limited | Households | 2006 |
| Burrows Brothers Estates Ltd | Construction | 2019 |
| Buttercup Drive Management Company Limited | Households | 2022 |
| Buttons Plastering Norfolk Limited | Construction | 2025 |
| C and E Parker Properties Ltd | Real estate | 2021 |
| C R Norfolk Plumbing Limited | Construction | 2017 |
| Cadence Business Consultancy Ltd | Professional & scientific | 2019 |
| Calm Norwich Ltd | Education | 2024 |
| Cambrian Way Contracting Ltd | Administrative & support | 2025 |
| Cambridge Healthcare Supplies 2012 Limited | Manufacturing | 2012 |
| Cambridge Healthcare Supplies Limited | Manufacturing | 1997 |
| Camellia Property Investments Limited | Real estate | 2023 |
| Cando Autocentres Limited | Wholesale & retail | 2005 |
| Capricorn Campers Limited | Hospitality | 2002 |
| Cardiowise Diagnostics Ltd | Health & social care | 2025 |
| Cardon Holdings Limited | Extraterritorial | 2004 |
| Care Build (East Anglia) Ltd | Construction | 2021 |
| Carnnell Sjoc Ltd | Information & communication | 2019 |
| Caroline Fryer Racing Limited | Administrative & support | 2010 |
| Carter Energy Consulting Ltd | Professional & scientific | 2018 |
| Casa R&E Ltd | Wholesale & retail | 2025 |
| Cascade Media Development Limited | Arts & recreation | 2012 |
| Cascade Pictures Limited | Professional & scientific | 2012 |
| Cavell Facilities Group Ltd | Professional & scientific | 2021 |
| CG Offshore Ltd | Mining & quarrying | 2025 |
| CGD Developments Limited | Construction | 2020 |
| Chalk Hill Media Ltd | Information & communication | 2009 |
| Champion Property Holdings Ltd | Real estate | 2020 |
| Champion Property Management Ltd | Real estate | 2017 |
| Chams Social Care Limited | Health & social care | 2019 |
| Chapel Arch Limited | Other services | 2019 |
| Chapman Cars Limited | Wholesale & retail | 2018 |
| Charg-Ed Ltd | Education | 2024 |
| Chargeangle Limited | Agriculture & fishing | 1996 |
| Chase Consultancy Services Ltd | Professional & scientific | 2025 |
| Cheshems Limited | Financial services | 2024 |
| Cheshunt Estates Limited | Real estate | 2017 |
| CHG Classics Limited | Wholesale & retail | 2016 |
| Chilli and Ginger WYM Ltd | Hospitality | 2022 |
| Chimera Construction and Conservation Ltd | Construction | 2015 |
| CIG Holdings Ltd | Financial services | 2017 |
| Cilerna Property Services Ltd | Real estate | 2025 |
| Citadel Computing Services Ltd | Information & communication | 2014 |
| City of FOG Limited | Wholesale & retail | 2018 |
| Cityscape Developments Limited | Real estate | 1983 |
| Ckcleanz Limited | Administrative & support | 2026 |