| Carters Transport Ltd | Transport & logistics | 2019 |
| Castlepoint Estates (South) Limited | Real estate | 2018 |
| Castles Furniture Ltd | Wholesale & retail | 2005 |
| Catherine Clare Limited | Real estate | 2025 |
| Catherine Marriott Coaching and Consultancy Ltd | Professional & scientific | 2025 |
| Catsumo Ltd | Professional & scientific | 2022 |
| CB Sheet Metal Limited | Manufacturing | 2006 |
| CBK Accounts Tuition Ltd | Education | 2020 |
| Cedar Court Residents Limited | Households | 2022 |
| Cedar Gardens (Lions Lane) Limited | Households | 2011 |
| Cedar Gardens 2014 Limited | Households | 2014 |
| Cedar Gate Management Company Limited | Households | 2010 |
| Celect Ultrasonics Ltd | Information & communication | 2015 |
| Centre VR Franchise Ltd | Professional & scientific | 2022 |
| Centurion Prestige Ltd | Wholesale & retail | 2019 |
| Centurion Property Ltd | Construction | 2020 |
| Ceriter Investments 4 Limited | Professional & scientific | 2022 |
| CF Executive Services Ltd | Administrative & support | 2015 |
| CFR Granby Limited | Hospitality | 2019 |
| Chaddesley Glen Freehold Ltd | Households | 2021 |
| Chalcat Consulting Limited | Professional & scientific | 2009 |
| Channelcraft Limited | Professional & scientific | 2024 |
| Charis Care Connect Ltd | Administrative & support | 2025 |
| Charles Nicholas Properties Ltd | Real estate | 2018 |
| Charles Openshaw Ltd | Professional & scientific | 2021 |
| Charlie IVE Building Ltd | Construction | 2024 |
| Charlie's Angels Cleaning Ltd | Administrative & support | 2023 |
| Charminster Inventories Ltd | Information & communication | 2015 |
| Charteroak Management Limited | Professional & scientific | 2023 |
| Chase Precision Engineering Limited | Professional & scientific | 2001 |
| Chaseborough Limited | Households | 2004 |
| Chaseside Cars Limited | Wholesale & retail | 2019 |
| Chatsworth RTM Company Limited | Real estate | 2017 |
| Cherif (Barnes) Limited | Administrative & support | 2013 |
| Cherished Memories Ltd | Wholesale & retail | 2015 |
| Chewtons Property Solutions Limited | Information & communication | 2023 |
| Chichester Homes Ltd. | Construction | 2018 |
| Chilman's Consultants Limited | Information & communication | 2013 |
| Chiltern Legal Limited | Professional & scientific | 2007 |
| Chiro Performance Ltd | Health & social care | 2024 |
| Chiron VET CPD Ltd | Professional & scientific | 2023 |
| Choice Chauffeurs LLP | | 2009 |
| Chris Mcmanus Consulting Ltd | Information & communication | 2020 |
| Chris Perrett Electrical Solutions Ltd | Construction | 2026 |
| Christchurch Garden Machinery Ltd | Wholesale & retail | 2014 |
| Christchurch Music Centre C.I.C. | Education | 2011 |
| Christchurch Radio Cabs Limited | Extraterritorial | 2006 |
| Chronos Energy Limited | Information & communication | 2022 |
| Churchill Affordable Living Limited | Real estate | 2007 |
| Churchill Estates Management Limited | Real estate | 2001 |
| Churchill Independent Living Ltd | Real estate | 2023 |
| Churchill Life Ltd | Real estate | 2023 |
| Churchill Lifestyle Ltd | Real estate | 2024 |
| Churchill Living (Developments) PLC | Real estate | 2010 |
| Churchill Living Group Limited | Real estate | 1984 |
| Churchill Living Ltd | Construction | 2007 |
| Churchill Property Holdings (NO. 17) Limited | Real estate | 2017 |
| Churchill Property Holdings (NO. 26) Limited | Real estate | 2017 |
| Churchill Retirement Living Limited | Real estate | 2023 |
| Churchill Retirement Management Limited | Real estate | 2020 |
| Churchill Retirement Rentals Limited | Real estate | 2019 |
| Churchill Sales & Lettings Limited | Real estate | 2014 |
| CIO Limited | Information & communication | 2020 |
| Ciri - Copage Independent Reviews and Investigations Limited | Health & social care | 2023 |
| City Time Ltd | Professional & scientific | 2003 |
| Citywise Direct Marketing Limited | Professional & scientific | 2003 |
| CJM Family Investment Limited | Professional & scientific | 2020 |
| CJT Management Limited | Professional & scientific | 2011 |
| CJT Vocational Skills Ltd | Construction | 2021 |
| CK Plumbing Limited | Construction | 2018 |
| CL Design Limited | Professional & scientific | 2025 |
| CL Property Rentals NO 1 Limited | Real estate | 2026 |
| Clashindarroch Windfarm Extension Limited | Energy | 2020 |
| Classic MG Services Limited | Wholesale & retail | 2014 |
| Claudius Research Limited | Professional & scientific | 2024 |
| Clay Nest Cafe Ltd | Wholesale & retail | 2026 |
| Clear Choice Solutions Ltd | Construction | 2024 |
| Clearrail Ltd | Information & communication | 2026 |
| Clegare Limited | Real estate | 2021 |
| Clickdoctor Limited | Health & social care | 2016 |
| Cliff Lodge Freehold Limited | Households | 2012 |
| Clifton Property Letting Limited | Real estate | 2024 |
| Climate Control Innovations Ltd | Construction | 2022 |
| Cloonlish Limited | Professional & scientific | 2014 |
| Cloud City Vapez UK Ltd | Other services | 2022 |
| Cloud City Vapez BD7 Ltd | Wholesale & retail | 2022 |
| CMD Global Ltd | Information & communication | 2011 |
| CMH Build Ltd | Construction | 2017 |
| Coach House Holidays Ltd | Hospitality | 2018 |
| Coach House Mews Right to Manage Company Limited | Households | 2007 |
| Coastal Air Ltd | Construction | 2025 |
| Coastal Motorhomes Limited | Wholesale & retail | 2014 |
| Coastal Tyres Ltd | Wholesale & retail | 2025 |
| Coastside Estates Ltd | Real estate | 2023 |
| Coco Palm London Ltd | Administrative & support | 2021 |
| Cocoa Evolutions Ltd | Extraterritorial | 2024 |
| Cocoon Outerwear Limited | Wholesale & retail | 2023 |
| Coffee Cave Redhill Limited | Hospitality | 2019 |
| Colborne Place (Woking) Management Company Limited | Households | 2017 |
| Colehill and Wimborne Radio Cabs Ltd | Transport & logistics | 2016 |