| Changewiseconsulting Ltd | Professional & scientific | 2023 |
| Chantry Green Limited | Professional & scientific | 2012 |
| Chapters Nurseries Group Limited | Health & social care | 2024 |
| Charlie's Wiltshire Trout Limited | Wholesale & retail | 2018 |
| Charlotte Barker Limited | Public administration | 2024 |
| Charlotte Crumley Sport Horses Limited | Agriculture & fishing | 2021 |
| Charlwood Construction (UK) Ltd | Construction | 2012 |
| Charter Chemicals International Limited | Real estate | 1974 |
| Chef's Farms Ltd | Wholesale & retail | 2020 |
| Cherry Consulting Associates Ltd | Professional & scientific | 2016 |
| Cherubs Beauty Spa Limited | Other services | 2010 |
| Chicorium Limited | Wholesale & retail | 2015 |
| Chilton Gate Management Company Limited | Households | 2020 |
| Chormedia Limited | Information & communication | 2015 |
| Chris Ford Limited | Professional & scientific | 2020 |
| Chromazone Films Limited | Information & communication | 2013 |
| Church Barn Holdings Limited | Financial services | 2020 |
| Church Barn Homes LLP | | 2024 |
| Church Barn Investments Limited | Real estate | 2020 |
| Church Barn Properties Limited | Real estate | 2020 |
| Cicuma Properties Limited | Real estate | 2015 |
| Cityregen NET Zero Ltd | Agriculture & fishing | 2020 |
| CJ A+Financials Ltd | Professional & scientific | 2011 |
| Class Cover Limited | Administrative & support | 2002 |
| Clean Fuel Living Limited | Manufacturing | 2025 |
| Cleaner Products Sussex Ltd | Wholesale & retail | 2018 |
| Clear Affinity Limited | Administrative & support | 2018 |
| Clear Blue Solutions Ltd | Information & communication | 2017 |
| Clear Vision Design Limited | Professional & scientific | 2006 |
| Clifton Events Ltd | Hospitality | 2026 |
| Closed Canopy Consultancy Limited | Extraterritorial | 2023 |
| Club 86 Limited | Administrative & support | 2023 |
| CMS Partners Ltd | Real estate | 2023 |
| CNS Scaffolding Ltd | Construction | 2026 |
| Coda Creative Ltd | Arts & recreation | 2022 |
| Codmore Spice Ltd | Hospitality | 2019 |
| Coldharbour Vineyard Limited | Professional & scientific | 2011 |
| Collaborative Pantry Limited | Hospitality | 2023 |
| Communications Centre International Limited | Wholesale & retail | 1989 |
| Comyn and James LLP | | 2009 |
| Concept 3 Ltd | Administrative & support | 2026 |
| Context Events Limited | Professional & scientific | 1998 |
| Cooke Hunter Williams Limited | Financial services | 2024 |
| Cooke's House Flower Co Ltd | Agriculture & fishing | 2023 |
| Coolwave Limited | Information & communication | 1999 |
| Coombelands Lane 14/02/1961 Limited | Extraterritorial | 2014 |
| Coombelands Racing Stables Limited Liability Partnership | | 2008 |
| Cooper Holdings Limited | Professional & scientific | 2007 |
| Cornerstone Computer Centre (Bognor Regis) Limited | Wholesale & retail | 2015 |
| Cortona Property Group Ltd | Real estate | 2017 |
| Cosworth Construction Limited | Construction | 2024 |
| Courpark Holdings Limited | Construction | 2005 |
| Coxon R&D LLP | | 2017 |
| Cozensview Ltd | Other services | 2021 |
| CPO Office Ltd | Administrative & support | 2025 |
| Crays Fire Limited | Professional & scientific | 2016 |
| Crays Property Management Limited | Real estate | 2013 |
| Creativetwo Ltd | Information & communication | 2019 |
| Cristina Homes Limited | Construction | 2003 |
| Crofton House (IOW) Management Limited | Administrative & support | 2013 |
| Crown Inn Cootham Ltd | Hospitality | 2018 |
| Croydon & South London Building Co.Limited | Real estate | 1935 |
| Cruden Horses Limited | Professional & scientific | 2022 |
| Crumpstar Limited | Wholesale & retail | 2025 |
| Cspod Property Management Ltd | Real estate | 2021 |
| Cutting Edge Gardening Ltd | Administrative & support | 2018 |
| Cwvc Limited | Professional & scientific | 2015 |
| D E a Marketing Limited | Wholesale & retail | 2000 |
| D S Electrical Contractors Ltd | Construction | 2021 |
| D.E.M (Monkmead) Ltd | Extraterritorial | 1962 |
| D.S & Associates Ltd | Administrative & support | 2004 |
| D2D Window Cleaning Services Limited | Administrative & support | 2024 |
| DA Loftus Ltd | Wholesale & retail | 2022 |
| DA Vinci Crew Limited | Construction | 2024 |
| Damask Consulting Ltd | Professional & scientific | 2019 |
| Damluki Properties Limited | Real estate | 2026 |
| Danhill Estate Limited | Real estate | 2017 |
| Darkroom Door Limited | Wholesale & retail | 2021 |
| Data Light Solutions Ltd | Professional & scientific | 2022 |
| Dave Taylor - Massage Training Ltd | Other services | 2015 |
| David Bates Limited | Real estate | 1978 |
| David Edwards Precision Engineering Ltd | Professional & scientific | 2014 |
| DC Trafficsolutions South Ltd | Construction | 2019 |
| DE HEP Consultancy Limited | Information & communication | 2002 |
| Decorative Collective Limited | Wholesale & retail | 2009 |
| Decorative Illumination Ltd | Construction | 2016 |
| Defined Homes Ltd | Real estate | 2025 |
| Delilah-Net Limited | Information & communication | 2025 |
| Deltaville Investments Limited | Administrative & support | 2002 |
| Denness Enterprises Limited | Wholesale & retail | 2012 |
| Design at 32 Limited | Construction | 2008 |
| Designs Woodcraft Ltd | Manufacturing | 2021 |
| DEW Claret and Blue Ltd | Transport & logistics | 2023 |
| Dilys Massage Ltd | Health & social care | 2025 |
| Dinner&Dish Limited | Manufacturing | 2023 |
| Divitia Limited | Extraterritorial | 2008 |
| Dkxl Limited | Information & communication | 2004 |
| DL Property & Lettings Services Ltd | Real estate | 2024 |
| DM Mechanical & Electrical Ltd | Construction | 2023 |
| Dominic Richards Landscaping & Design Ltd | Administrative & support | 2012 |