| BEN Howlett Limited | Administrative & support | 2010 |
| Benedict Tucker Tuition Ltd | Education | 2019 |
| Bennett's Home Shine Ltd | Administrative & support | 2016 |
| Bentley Beavoir Limited | Construction | 1989 |
| Bergen Consulting Ltd | Professional & scientific | 2025 |
| Berryman Food Science Ltd | Professional & scientific | 2013 |
| Berrythorne Property Ltd | Real estate | 2017 |
| Best & Brilliant Limited | Wholesale & retail | 2014 |
| BFJ Consultants Ltd | Information & communication | 2008 |
| Bighton Hill Limited | Agriculture & fishing | 2015 |
| Bighton PUB LLP | | 2019 |
| Binky Bear LLP | | 2011 |
| Biosigma Limited | Professional & scientific | 2011 |
| Bite Dental Care Ltd | Health & social care | 2019 |
| Blockley Aviation Limited | Wholesale & retail | 2010 |
| Blueprint Project Consultant Ltd | Professional & scientific | 2025 |
| Blueskye Capital Ltd | Real estate | 2024 |
| Bluesteelwave Ltd | Real estate | 2023 |
| Bluewater Atlantic Limited | Administrative & support | 2001 |
| BMC Lighting Ltd | Professional & scientific | 2014 |
| Bmfac Ltd | Real estate | 2022 |
| Boon Space Limited | Real estate | 2017 |
| Bramdean Aviation Limited | Administrative & support | 2013 |
| Bramdean Consultants LLP | | 2016 |
| Bramdean Limited | Extraterritorial | 2020 |
| Branta Advisory Limited | Professional & scientific | 2018 |
| Bremont Construction Limited | Construction | 2013 |
| Brett Polo Limited | Agriculture & fishing | 1998 |
| Brex Property Limited | Real estate | 2024 |
| Brill Close Management Company Limited | Real estate | 2009 |
| Brockwood Entertainment Ltd | Information & communication | 2021 |
| Broker Experts Limited | Financial services | 2018 |
| Brunning Commercial Managment Limited | Construction | 2017 |
| Brushbaby Holdings Limited | Professional & scientific | 2017 |
| Brushbaby International Holdings Limited | Financial services | 2021 |
| Brushbaby Limited | Wholesale & retail | 2007 |
| Budd Construction Limited | Construction | 2022 |
| Busby Builders Limited | Construction | 2012 |
| Butler & Co Alresford Limited | Professional & scientific | 2017 |
| Butler & Co Audit Limited | Professional & scientific | 2021 |
| Butler & King Limited | Construction | 1998 |
| Butt ASH Limited | Real estate | 2016 |
| BY Boon Limited | Construction | 2021 |
| C a Mitchell Estates Ltd | Real estate | 2017 |
| C&C Motorsport Factory Ltd | Arts & recreation | 2026 |
| Cambium (Holdings) Limited | Financial services | 2018 |
| Cambium Construction Limited | Construction | 2019 |
| Cambium Developments Limited | Construction | 2019 |
| Cambium Finance Limited | Professional & scientific | 2019 |
| Cambium Properties Limited | Real estate | 2019 |
| Camspring Property Ltd | Real estate | 2018 |
| Candover Audio Visual Ltd | Wholesale & retail | 2025 |
| Candover AV Limited | Information & communication | 2013 |
| Candover Capital 1 Ltd | Construction | 2023 |
| Candover Capital 2 Ltd | Construction | 2023 |
| Candover Capital 3 Ltd | Construction | 2026 |
| Candover Lifestyle Management Ltd | Administrative & support | 2023 |
| Canning Cornard Consultancy Limited | Professional & scientific | 2024 |
| Caputin Ltd | Professional & scientific | 2009 |
| Caravan Electrical Services Ltd | Construction | 2016 |
| Cardinal Point Marine Ltd. | Professional & scientific | 2011 |
| Carlin Management Services Ltd | Arts & recreation | 2013 |
| Carlin Performance Ltd | Manufacturing | 2021 |
| Carouse Wines Limited | Wholesale & retail | 2024 |
| Carpe Diem Risk Management Limited | Professional & scientific | 2011 |
| Casdron Corporate Trustee Limited | Professional & scientific | 2008 |
| Casdron Holdings Limited | Financial services | 2016 |
| Ceason Food Co Ltd | Manufacturing | 2026 |
| Cedar, Cutts & Moore Ltd. | Construction | 2017 |
| CES Essex Ltd | Construction | 2013 |
| Chalky Hill Wines Limited | Extraterritorial | 2010 |
| Chamberlain Construction Limited | Construction | 1991 |
| Champion Bars Ltd | Hospitality | 2015 |
| Changehub Consulting UK Ltd | Professional & scientific | 2001 |
| Chargill Properties Ltd | Real estate | 2011 |
| Charlie Alford Design Ltd | Professional & scientific | 2019 |
| Charlton Construction Limited | Construction | 2012 |
| Charters Bespoke Limited | Manufacturing | 2026 |
| Chase Expeditions Management Ltd | Other services | 2014 |
| Chessel Holdings Limited | Financial services | 2014 |
| Chessel Support Services Ltd. | Health & social care | 1994 |
| Cheverton Aggregates Ltd | Mining & quarrying | 2005 |
| Chris Bailey Orthopaedics Limited | Health & social care | 2012 |
| Christopher Mann International Ltd | Professional & scientific | 2025 |
| Church Street Farm Management Company Limited | Households | 2017 |
| Church Street Hurstbourne Tarrant Ltd | Real estate | 2022 |
| Cida Canine Training Ltd | Other services | 2024 |
| Clanger Limited | Professional & scientific | 2007 |
| Class 25 Media Limited | Information & communication | 2026 |
| Clear Blue Energy Limited | Construction | 2016 |
| Cleartalent Limited | Health & social care | 2012 |
| Clockwork Plumbing & Heating Limited | Construction | 2024 |
| Clos Commercial Ltd | Construction | 2016 |
| Club Matters Tableware Ltd | Wholesale & retail | 2021 |
| CM James Building Contractor Ltd | Construction | 2012 |
| Cold Control Group Limited | Extraterritorial | 2026 |
| Coldcontrol Services Limited | Manufacturing | 1989 |
| Coleman Building Company LLP | | 2005 |
| Colwin Removals Ltd | Transport & logistics | 2019 |
| Combmix Limited | Wholesale & retail | 1976 |