| Candook Ltd | Information & communication | 2019 |
| Candy House Solutions Limited | Hospitality | 2020 |
| Cannongate Properties Limited | Extraterritorial | 2005 |
| Capital Windows (South) Limited | Administrative & support | 2000 |
| Cardverse Trading Ltd | Wholesale & retail | 2025 |
| Carpet Store Lymington Limited | Wholesale & retail | 2004 |
| Case Chemical Consultancy Limited | Manufacturing | 1993 |
| Casino Films Limited | Arts & recreation | 1988 |
| Catchymonkey Design Ltd | Administrative & support | 2003 |
| Catchymonkey Ltd | Extraterritorial | 2003 |
| Causeway Garage (Chippenham) Limited | Real estate | 1978 |
| Cavalier Lettings Ltd | Real estate | 2017 |
| Cavalier Projects Ltd | Real estate | 2017 |
| Cavan Health Limited | Health & social care | 2016 |
| Caxton Bell Limited | Professional & scientific | 2003 |
| CBD Love UK Limited | Wholesale & retail | 2020 |
| CC30 Associates Ltd | Information & communication | 2026 |
| CDS (South) Limited | Administrative & support | 2013 |
| CE Co Group Limited | Arts & recreation | 2016 |
| Cedar Rydal (Hadlow) Limited | Construction | 2016 |
| Cedar Rydal (Lyndhurst) Limited | Construction | 2020 |
| Cedar Rydal Limited | Construction | 2006 |
| Ceinfryn Holdings Ltd | Financial services | 2026 |
| Cell Shark Ltd | Professional & scientific | 2026 |
| Cell Zone Ltd | Wholesale & retail | 2019 |
| Central Geophysical Services Ltd | Professional & scientific | 1997 |
| Central Southern Security Limited | Administrative & support | 1981 |
| Cervelliere Limited | Transport & logistics | 2015 |
| CGS Emea Ltd | Information & communication | 2019 |
| Chalfield Projects Limited | Real estate | 2009 |
| Chalfont Tile Centre Limited | Wholesale & retail | 1994 |
| Chamberlain Lets Ltd | Real estate | 2024 |
| Champions International Ltd | Hospitality | 2020 |
| Channel Y Consulting Limited | Professional & scientific | 2012 |
| Charisma Dance Academy Limited | Arts & recreation | 2007 |
| Charles Bishop Limited | Agriculture & fishing | 1972 |
| Charles Roberts Limited | Professional & scientific | 2007 |
| Charlie Herring Ltd | Agriculture & fishing | 2005 |
| Charlie Sailing Limited | Arts & recreation | 2000 |
| Charnic Interiors Limited | Construction | 1998 |
| Chartas Accounting Services Ltd | Professional & scientific | 2010 |
| Chelsea Property Investments Limited | Real estate | 2019 |
| Chequers Blue Limited | Financial services | 2005 |
| Chequers Green Limited | Hospitality | 1999 |
| Chevalier's Properties Limited | Real estate | 2020 |
| Chilliworks Limited | Professional & scientific | 2012 |
| Chiltern Heath Limited | Administrative & support | 2025 |
| CHIPPY77 Limited | Construction | 2025 |
| Chisnell Design Limited | Professional & scientific | 2024 |
| Christopher Mellor Limited | Arts & recreation | 2002 |
| Church Hill Management Company Limited | Households | 1998 |
| Ciao Belli Restaurant Ltd | Hospitality | 2023 |
| Ciaran Kelly Consultancy Ltd | Health & social care | 2019 |
| Cindy's Ltd | Wholesale & retail | 2024 |
| Circles in a Circle Limited | Professional & scientific | 2024 |
| Citizens Advice New Forest Ltd | Information & communication | 2009 |
| CL Fisheries Ltd | Agriculture & fishing | 2025 |
| Clarity Audio & Medical Limited | Professional & scientific | 2016 |
| Clarity Marine Ltd | Manufacturing | 2026 |
| Classique Ltd | Wholesale & retail | 1993 |
| Clayton Farm New Forest Ltd | Hospitality | 2023 |
| Cleaner Mates Property Services Ltd | Administrative & support | 2024 |
| Clear View Training & Consultancy Ltd | Education | 2009 |
| Clegg Freehold Limited | Real estate | 2016 |
| Clegg Properties Ltd | Real estate | 2007 |
| CLH Procurement Ltd | Real estate | 2013 |
| Client Fashion Limited | Administrative & support | 2008 |
| Cljm Investments Ltd | Real estate | 2023 |
| Clockwork Yellow DRY Cleaners of Distinction Ltd. | Other services | 1998 |
| Close Group Ltd | Arts & recreation | 2024 |
| Cloud Brockenhurst Limited | Real estate | 2022 |
| Cloud Brockenhurst Management Company Ltd | Households | 2024 |
| Cloud Eleven Accountants Ltd | Professional & scientific | 2013 |
| Cloud Eleven Consultants Limited | Professional & scientific | 2022 |
| Cloudbuilder Ltd | Information & communication | 2015 |
| CLS Clover Limited | Professional & scientific | 2007 |
| Coast and Country Landscaping and Construction LLP | | 2021 |
| Coast Pilates Ltd | Health & social care | 2018 |
| Coastal Business Consultants Ltd | Administrative & support | 2015 |
| Coastal Care Limited | Health & social care | 2008 |
| Coastal Doors & Windows Ltd | Construction | 2019 |
| Coastal Gallery (Lymington) LLP | | 2013 |
| Coastal Garden Buildings Limited | Extraterritorial | 2018 |
| Coastal Glow Limited | Other services | 2025 |
| Cobb Cows Limited | Agriculture & fishing | 2019 |
| Coffee Mongers Roasting Company Limited | Administrative & support | 2014 |
| Coffeemongers Cafe Ltd | Hospitality | 2024 |
| COG and Wire Employee Ownership Trustee Limited | Professional & scientific | 2014 |
| Collectablessouth Ltd | Wholesale & retail | 2013 |
| Collison Motor Company Limited | Real estate | 1972 |
| Commercial RIB Charter Limited | Extraterritorial | 2021 |
| Connor Ridout Construction Limited | Construction | 2021 |
| Consequence Films Ltd | Information & communication | 2007 |
| Construction Performance Limited | Administrative & support | 2008 |
| Contrast Design Limited | Information & communication | 2003 |
| Controlled Home Ltd | Professional & scientific | 2014 |
| Cooling & Heating Solutions Limited | Administrative & support | 1996 |
| Coombe Stables Ltd | Agriculture & fishing | 2018 |
| Copperdoor Limited | Construction | 2019 |
| Corbett Milsom Ltd | Professional & scientific | 2019 |