| BA Health & Response Ltd | Public administration | 2026 |
| BAD Studio Ltd | Information & communication | 2014 |
| Bagan Bari Ltd | Hospitality | 2025 |
| Baileys Transport (1985) Limited | Wholesale & retail | 1985 |
| Bakeaholics Ltd | Wholesale & retail | 2021 |
| Bakeaholics Nationwide Ltd | Wholesale & retail | 2024 |
| Bangla Lily Limited | Hospitality | 2025 |
| Barkers Print and Design Limited | Manufacturing | 2001 |
| Barrier Biotech Limited | Manufacturing | 1990 |
| Barrier Holdings Limited | Manufacturing | 2000 |
| Barts Pressure Washing Ltd | Administrative & support | 2024 |
| BE Seen BE Scouted Ltd | Arts & recreation | 2026 |
| Beaumara Ltd | Professional & scientific | 2021 |
| Beauty Escape Ltd | Other services | 2021 |
| Beckett and Graham Limited | Other services | 1984 |
| Beckie Miller Ltd | Other services | 2026 |
| Beechwood Pet Supplies Limited | Wholesale & retail | 2016 |
| Bellibone Gardens Residents Association Limited | Households | 2021 |
| Benjamin James Timber Ltd | Manufacturing | 2021 |
| Beside Youth C.I.C. | Health & social care | 2026 |
| Better Development Ltd | Information & communication | 2025 |
| Beulah Property Management Company Ltd | Real estate | 2013 |
| Beverley Bulmer Ltd | Education | 2025 |
| Big Apple Hospitality Limited | Hospitality | 2025 |
| Big J'S Burritos LP | | 2017 |
| Birlea Ltd | Wholesale & retail | 2023 |
| BJT Developments Ltd | Construction | 2020 |
| BJT Investments & Holdings Ltd | Professional & scientific | 2021 |
| Black Door Eatery Limited | Hospitality | 2024 |
| BLM Livestock & Equipment Limited | Agriculture & fishing | 2022 |
| Blue Castle Meadows Ltd | Hospitality | 2022 |
| Blue Harbour Property Developments Ltd | Construction | 2016 |
| Bluechip Assist Limited | Wholesale & retail | 2018 |
| Bluechip Warranty Limited | Wholesale & retail | 2014 |
| Bluechip Wraps Ltd | Professional & scientific | 2024 |
| Blyth&Co Ltd | Other services | 2025 |
| BML Anglia Ltd | Administrative & support | 2025 |
| Bobby's 1 Limited | Wholesale & retail | 1999 |
| Booth There IT IS Ltd | Professional & scientific | 2026 |
| Bougie Social Media Ltd | Other services | 2023 |
| BOW and Arrows Properties Ltd | Real estate | 2024 |
| Boxtec Limited | Education | 2018 |
| BP Highway Services Ltd | Construction | 2018 |
| BPC (Anglia) Limited | Administrative & support | 2002 |
| Bramble Homes Norfolk Limited | Real estate | 2024 |
| Brandon Group Holdings Ltd | Real estate | 2025 |
| Brandon Group Property Services Ltd | Other services | 2016 |
| Breckland Auto Services Limited | Wholesale & retail | 2016 |
| Breckland Construction Ltd | Construction | 2018 |
| Breckland Contractors Limited | Construction | 2004 |
| Breckland Homes Management Company Limited | Households | 2026 |
| Breckland Industrial Limited | Administrative & support | 1998 |
| Breckland Land Limited | Real estate | 2020 |
| Breckland Storage Ltd | Real estate | 2015 |
| Breckland Truck Rentals Limited | Administrative & support | 1997 |
| Brendon Taylor Logistics Ltd | Transport & logistics | 2025 |
| Briar Gardens Management Company Limited | Households | 2007 |
| Britannia Consultancy EMW Ltd | Professional & scientific | 2019 |
| Broadland Tree Services Limited | Agriculture & fishing | 2026 |
| Broadleaf Barrow Ltd | Construction | 2021 |
| Broadleaf BHD Ltd | Real estate | 2022 |
| Broadleaf Building Limited | Real estate | 2022 |
| Broadleaf Capital Limited | Real estate | 2022 |
| Broadleaf THT Ltd | Real estate | 2020 |
| Broads Electrical Ltd. | Construction | 2011 |
| Brookside Holdco Ltd | Financial services | 2023 |
| BTR Norfolk Limited | Construction | 2024 |
| Buckenham Farms Limited | Agriculture & fishing | 1959 |
| Bumr Estore Ltd | Wholesale & retail | 2023 |
| Bunn Holdings Limited | Financial services | 2018 |
| Buntons & Wardley Ltd. | Real estate | 2021 |
| Buttercup Properties (2019) Limited | Real estate | 2019 |
| C and C Car Parts Norfolk Limited | Water & waste | 2017 |
| C L Construction & Plant Hire Limited | Construction | 2024 |
| C T Trailers Ltd | Manufacturing | 2019 |
| C.L.C. Limited | Professional & scientific | 2002 |
| CA Negus Limited | Agriculture & fishing | 2024 |
| Cadnow Limited | Professional & scientific | 1998 |
| Cambridge City Chauffeurs Ltd | Transport & logistics | 2010 |
| Cambridge Flow Screed Limited | Construction | 2022 |
| Carbon Fibre Composites Ltd | Professional & scientific | 2016 |
| Carlton Manor Opco Limited | Hospitality | 2023 |
| Carmico Ltd | Information & communication | 2023 |
| Casparcom Limited | Real estate | 2015 |
| Castle View Opco Limited | Hospitality | 2023 |
| Cater-Tech (Norwich) Limited | Administrative & support | 2003 |
| Catherine Haynes Ltd | Real estate | 2021 |
| Cbnf Properties Limited | Real estate | 2017 |
| CE Clarke Fencing Ltd | Construction | 2024 |
| Cecil Amey Holdings Limited | Financial services | 2012 |
| Cecil Amey Limited | Health & social care | 2005 |
| Cecil Amey Partnerships Limited | Administrative & support | 2023 |
| Cecil C. Amey Limited | Extraterritorial | 1955 |
| Centricity Consulting Limited | Transport & logistics | 2021 |
| Century Management Solutions Limited | Professional & scientific | 2006 |
| Cerbera Finance Limited | Administrative & support | 2007 |
| Chalfonts Tea Rooms Limited | Hospitality | 2024 |
| Chapman Creativity & Innovation Limited | Professional & scientific | 2010 |
| Chillax Driving Skill 4 Life Limited | Other services | 2014 |
| Chine Farm Opco Limited | Hospitality | 2023 |