| Chilworth Kennels Limited | Other services | 2002 |
| Chilworth Lakes Management Limited | Hospitality | 2009 |
| Chilworth Partnership Ltd | Administrative & support | 2010 |
| Chilworth Property Management Limited | Real estate | 2019 |
| Chimcee Foods Ltd | Wholesale & retail | 2025 |
| Chimi Shak Ltd | Hospitality | 2025 |
| Chimneypots Lettings Limited | Real estate | 2017 |
| China Inn (Shirley) Ltd | Extraterritorial | 2025 |
| China Sky 8888 Ltd | Hospitality | 2026 |
| China Sky Limited | Real estate | 2016 |
| China WOK 2024 Ltd | Hospitality | 2024 |
| Chinaren Limited | Real estate | 2023 |
| Chinatown Supermarkets Limited | Wholesale & retail | 2004 |
| Chingfords (Slough) Limited | Other services | 2025 |
| Chippy Chips Ltd | Hospitality | 2018 |
| Chiron Medical Consultancy Ltd | Health & social care | 2021 |
| Chivers Architecture & Planning Ltd | Professional & scientific | 2011 |
| Chivers Consulting Limited | Professional & scientific | 2025 |
| Chivickdan Group Limited | Wholesale & retail | 2025 |
| Chkn Shack Ltd | Hospitality | 2019 |
| Chloe Marketta Cosmetics Limited | Other services | 2022 |
| Chocolate INK Ltd | Manufacturing | 2023 |
| Chocolate Muffin Publishing Limited | Education | 2010 |
| Chocolixious Desserts Ltd | Wholesale & retail | 2025 |
| Chohan Construction Design & Build Limited | Construction | 2025 |
| Chohan Construction Designs & Build Limited | Construction | 2026 |
| Choice Auto Repairs Limited | Wholesale & retail | 2026 |
| Choice Financial Solutions Limited | Financial services | 2020 |
| Choice Mortgage Solutions Limited | Financial services | 2015 |
| Choice Roofline Ltd | Construction | 2022 |
| Chokhdee Limited | Hospitality | 2018 |
| Chon Chola Limited | Hospitality | 1999 |
| Choose Design Ltd | Administrative & support | 2004 |
| Choose Health and Wellbeing Ltd | Health & social care | 2024 |
| Chophouse Limited | Hospitality | 2025 |
| Chorvis Limited | Professional & scientific | 2026 |
| Choudhury’S Spice Ltd | Hospitality | 2018 |
| Chough Consulting Limited | Professional & scientific | 2011 |
| Chough Services Limited | Professional & scientific | 2018 |
| Chow Consulting Ltd | Administrative & support | 2016 |
| Chow Wagon Ltd | Hospitality | 2026 |
| Chra Ltd | Administrative & support | 2009 |
| Chris Ashleigh Hair Design Ltd | Other services | 2016 |
| Chris Barfoot Productions Limited | Extraterritorial | 2020 |
| Chris Car Repairs Ltd | Wholesale & retail | 2024 |
| Chris Carter Associates Limited | Professional & scientific | 1998 |
| Chris Evans Holdings Ltd | Financial services | 2025 |
| Chris Evans Online Coaching Ltd | Education | 2023 |
| Chris Hendry Associates Limited | Professional & scientific | 2017 |
| Chris J Tully Ltd | Construction | 2026 |
| Chris Main Ltd | Administrative & support | 2015 |
| Chris Packham Limited | Information & communication | 2007 |
| Chris Van Schaick Ltd | Professional & scientific | 2010 |
| Chris Williams (Creative Carpentry) Limited | Construction | 2014 |
| Chrisc Ltd | Health & social care | 2011 |
| Christchurch Marina Park Limited | Hospitality | 2016 |
| Christian & Family Ltd | Wholesale & retail | 2018 |
| Christinamary Enterprises Ltd | Education | 2025 |
| Christopher George Dolman Limited | Extraterritorial | 2025 |
| Christopher Hoare Tree Services Limited | Administrative & support | 2003 |
| Christopher Lewis Ltd | Professional & scientific | 2019 |
| Chromat Assets Management Ltd | Administrative & support | 2010 |
| Chromat Ukeig | | 2011 |
| Chrome Sparks Ltd | Construction | 2021 |
| Chronos Financial Ltd. | Professional & scientific | 2016 |
| Chronotis Holdings Ltd | Financial services | 2024 |
| Chronotis Limited | Professional & scientific | 2017 |
| Chsd Playing Cards Limited | Manufacturing | 2020 |
| Chuba Holmes Limited | Health & social care | 2023 |
| Chung Limited | Real estate | 2005 |
| Chunkys Fish and Chips Ltd | Hospitality | 2023 |
| Chunkys North Baddesley Ltd | Hospitality | 2025 |
| Chupeto Ltd | Transport & logistics | 2023 |
| Church Mews (Swanmore) Management Company Ltd | Hospitality | 2005 |
| Churcheis Catering Limited | Hospitality | 2021 |
| Churchward Homes Limited | Real estate | 2021 |
| Chute Film Limited | Professional & scientific | 2014 |
| Chydonicine Limited | Real estate | 2022 |
| CI Custom Improvements Ltd | Construction | 2023 |
| Cianne Design Limited | Professional & scientific | 2018 |
| Ciao Homes Limited | Real estate | 2025 |
| Ciara Murphy Ltd | Professional & scientific | 2025 |
| CIB Electrical Ltd | Manufacturing | 2019 |
| Cibaku Ltd | Wholesale & retail | 2025 |
| Cibest Ltd | Manufacturing | 2021 |
| Cibus Limited | Extraterritorial | 2013 |
| Cicero Court Management Company Limited | Households | 1978 |
| Ciesielski Logistics Ltd | Transport & logistics | 2016 |
| Ciesse Flower UK Limited | Wholesale & retail | 2021 |
| Ciggyjuice Limited | Wholesale & retail | 2013 |
| Cigisped Limited | Transport & logistics | 2017 |
| Cila's Secret Limited | Manufacturing | 2020 |
| CIM Group Holdings Ltd | Financial services | 2025 |
| CIM Online Limited | Information & communication | 2008 |
| CIM Software Holdings Ltd | Financial services | 2025 |
| CIM Software Limited | Administrative & support | 2017 |
| Cimboco Limited | Information & communication | 2004 |
| Cinaco Ltd | Manufacturing | 2023 |
| Cindel Logistics Ltd. | Transport & logistics | 2014 |
| Cinderpath Ventures Ltd | Wholesale & retail | 2025 |