| Case Architecture Limited | Professional & scientific | 2014 |
| Caspase Clinical Science Ltd | Professional & scientific | 2026 |
| Caspian Developments Limited | Construction | 2009 |
| Caspian Holdings (U.K) Limited | Financial services | 2017 |
| Caspian Properties (U.K) Limited | Real estate | 2016 |
| Caspian Property Group Ltd | Real estate | 2021 |
| Cassin-Scott Associates Limited | Administrative & support | 1998 |
| Cassis Contracts Limited | Information & communication | 2024 |
| Cast Building Limited | Construction | 2019 |
| Cast Design Limited | Professional & scientific | 2018 |
| Castle Management Consulting Limited | Professional & scientific | 2025 |
| Castle Oak Property Ltd | Real estate | 2021 |
| Catalina Freehold Limited | Households | 2009 |
| CATALYST42 Limited | Information & communication | 2023 |
| Caterbitz Ltd | Wholesale & retail | 2016 |
| Caterpillar Marine Power UK Limited | Manufacturing | 1968 |
| Caterstone RTM Company Limited | Households | 2018 |
| Catherine COX Consultancy Limited | Public administration | 2024 |
| Catlike Ltd | Information & communication | 2024 |
| Caub Enterprises Limited | Information & communication | 2021 |
| Caundle Villa Limited | Households | 2000 |
| Cause & Effect Creative Ltd | Wholesale & retail | 2017 |
| Cave Spider Technology Limited | Professional & scientific | 2014 |
| Caxa Limited | Professional & scientific | 2012 |
| Cayuga Enterprises Limited | Professional & scientific | 2014 |
| CB Pension Contractors Ltd | Financial services | 2024 |
| CBD Labour Ltd | Information & communication | 2017 |
| Cbhf Limited | Professional & scientific | 2015 |
| CBS (Dorset) Limited | Construction | 2011 |
| CC Motorbike Training Limited | Education | 2016 |
| CCK Consulting Limited | Information & communication | 2018 |
| CE Statistics Limited | Information & communication | 2021 |
| Ceanothus Limited | Professional & scientific | 2025 |
| Cedar Innovations Limited | Administrative & support | 2017 |
| Ceesquared Ventures Ltd | Wholesale & retail | 2024 |
| Cenote Digital Limited | Information & communication | 2026 |
| Cerebellum Consulting Limited | Information & communication | 2024 |
| Certifly Ltd | Professional & scientific | 2025 |
| Certus Consultancy Limited | Information & communication | 2014 |
| Ceruna Proconsult Ltd | Information & communication | 2023 |
| CF Cybersecurity Ltd | Information & communication | 2022 |
| CFM Speditionbv Ltd | Transport & logistics | 2016 |
| CFS Testing Services Ltd | Information & communication | 2017 |
| CG ENG Limited | Professional & scientific | 2023 |
| Cgselling Ltd | Wholesale & retail | 2026 |
| Cgvi Limited | Information & communication | 2022 |
| Chalbury Limited | Wholesale & retail | 2021 |
| Chalmermagne Limited | Other services | 2025 |
| Chancellor Software Ltd | Information & communication | 2021 |
| Chander Investments Limited | Real estate | 2020 |
| Change Mrkt Ltd | Professional & scientific | 2017 |
| Channelnet IT Services Ltd | Information & communication | 2017 |
| Chaos MAP Limited | Information & communication | 2019 |
| Chapel Lodges Limited | Hospitality | 2018 |
| Chapman Specialist Metal Roofing & Cladding Ltd | Construction | 2011 |
| Chapwell Method Ltd | Education | 2021 |
| Char BO Properties Ltd | Construction | 2022 |
| Charles Taylor Court Management Company Limited | Households | 1989 |
| Charlotte Lytton Ltd | Professional & scientific | 2023 |
| Charlotte Nicole Ltd | Real estate | 2025 |
| Charlton Jays Limited | Wholesale & retail | 2021 |
| Charlton Stour Limited | Wholesale & retail | 2023 |
| Charminster Farm (Phase 2) Management Limited | Households | 2019 |
| Charter Tech Limited | Manufacturing | 1990 |
| Chase Business Consultants Limited | Professional & scientific | 2005 |
| Chase Estate Services Ltd | Real estate | 2025 |
| Chase Farming Ltd | Agriculture & fishing | 2008 |
| Chase Freight (Southern) Limited | Transport & logistics | 2015 |
| Chase Shoot Ltd | Agriculture & fishing | 2014 |
| Chaseborough House Care Limited | Real estate | 2012 |
| Chasers FC Ltd | Arts & recreation | 2025 |
| Chaumiere Property (UK) Ltd | Real estate | 2020 |
| CHC Direct Ltd | Professional & scientific | 2014 |
| Check IT OUT Inventory Service Ltd | Real estate | 2025 |
| Cheeky TUI Ltd | Professional & scientific | 2024 |
| Chef Kesgin's Cafe Limited | Hospitality | 2025 |
| Chef Media Ltd | Information & communication | 2020 |
| Chelstone Management (Poole) Limited | Professional & scientific | 2008 |
| Chelstone Management Limited | Professional & scientific | 2003 |
| Cheneford Limited | Wholesale & retail | 1992 |
| Cherry Grange Freehold Limited | Real estate | 2013 |
| Cherry Grange RTM Company Limited | Real estate | 2010 |
| Chesil Living Ltd | Real estate | 2025 |
| Chetwynd Management Company Limited | Households | 1986 |
| Chevrons Management Company Limited(The) | Households | 1985 |
| Cheyne Link Holdings Limited | Financial services | 2018 |
| Cheyne Link Limited | Information & communication | 1997 |
| Chiaroscuro Solutions Ltd | Health & social care | 2016 |
| Chic Nails Ltd | Other services | 2024 |
| Chief Nerd Limited | Information & communication | 2018 |
| Chief Thinking Officer Limited | Professional & scientific | 2026 |
| Chill Clothing Ltd | Wholesale & retail | 2026 |
| Chilli JAM Creative Limited | Information & communication | 2008 |
| Chillout Worldwide Limited | Other services | 2012 |
| Chillwater Farm Ltd | Agriculture & fishing | 2023 |
| Chiltern Online Services Limited | Professional & scientific | 2014 |
| Chinese Whispers (Corfe) Ltd | Hospitality | 2003 |
| Chiropractor Care Ltd | Health & social care | 2018 |
| Chris Baxter Contractors Limited | Construction | 2002 |
| Chris Elmitt Consulting Limited | Professional & scientific | 2016 |