| Chatsworth House Management Co. Limited | Households | 1980 |
| Chattowood Management Limited | Households | 2022 |
| Chatty Chicks Childcare Ltd | Health & social care | 2025 |
| Chaytor & Swann Live-In Carers Ltd | Administrative & support | 2026 |
| CHC Staffing Solutions Ltd | Health & social care | 2025 |
| Cheaper Motors Ltd | Wholesale & retail | 2025 |
| Cheasley Contracts Limited | Construction | 2007 |
| Chelmer Mortgages Ltd. | Financial services | 2012 |
| Chelmer Renovations Ltd | Construction | 2025 |
| Chelmo Trading Ltd | Administrative & support | 2018 |
| Chelmsford Cars and Commercials Limited | Real estate | 1993 |
| Chelmsford City Electrical and Mechanical Ltd | Extraterritorial | 2012 |
| Chelmsford City Health PCN Ltd | Health & social care | 2023 |
| Chelmsford Housekeeping Services Ltd | Administrative & support | 2024 |
| Chelmsford Skip Hire Limited | Professional & scientific | 2002 |
| Chelmsford Tamil Association | Education | 2021 |
| Chenerys Chimneys Limited | Administrative & support | 2012 |
| Cheng Clinic Limited | Health & social care | 2019 |
| Cherica Limited | Other services | 2011 |
| Cherish Gifts Ltd | Professional & scientific | 2009 |
| Cherry Allen Limited | Administrative & support | 2016 |
| Cherry Oak Carpentry Limited | Construction | 2007 |
| Cherry Orchard (Management Company) Limited | Households | 2022 |
| Cherry Tree Mews Residents Management Company Ltd | Households | 2026 |
| Cherrywood Court Limited | Households | 1970 |
| Cheryl Court Residents RTM Company Limited | Households | 2017 |
| Chesterfield Capital Limited | Professional & scientific | 2010 |
| Chesterwell House Management Company Limited | Real estate | 2021 |
| Chesterwell Limited | Extraterritorial | 2015 |
| Chesterwell Mews Management Company Limited | Real estate | 2021 |
| Chestnut Mews (Theydon Bois) Management Company Limited | Households | 2019 |
| Chestnuts Investments Limited | Administrative & support | 2020 |
| Chestone Ltd | Wholesale & retail | 2025 |
| Cheung Property Limited | Real estate | 2020 |
| Cheviot Cottages Limited | Professional & scientific | 2021 |
| Chevis Engineering Ltd | Construction | 2026 |
| Chez Afrique Limited | Hospitality | 2024 |
| Chfd Limited | Hospitality | 2017 |
| CHH East Limited | Real estate | 2022 |
| CHI Hub Ltd | Professional & scientific | 2021 |
| Chibeth Ltd | Health & social care | 2022 |
| Chibism Ltd | Wholesale & retail | 2011 |
| Chichester Dental Partners Limited | Health & social care | 2018 |
| Chicken on the Wheels Ltd | Hospitality | 2025 |
| Chicken Variety Ltd | Hospitality | 2024 |
| Chihambakwe Services Ltd | Health & social care | 2016 |
| Chikel Ltd | Health & social care | 2019 |
| Child Centred Nurseries Limited | Professional & scientific | 2005 |
| Child First Trust | Education | 2014 |
| Childsplay Day Nursery Ltd | Health & social care | 2024 |
| Chilled Air Solutions Limited | Manufacturing | 2011 |
| Chilli Zone Limited | Hospitality | 2024 |
| Chillies Ltd | Hospitality | 2025 |
| Chillpig Ltd | Education | 2022 |
| Chilton Court Management Company (Ipswich) Limited | Households | 1978 |
| Chilton House Property Development Limited | Construction | 2026 |
| Chimp Limited | Construction | 2026 |
| Chimz Security Ltd | Administrative & support | 2025 |
| China City CO2 Ltd | Hospitality | 2026 |
| China House CO2 Ltd | Hospitality | 2019 |
| Chinaveg Limited | Arts & recreation | 1994 |
| Chinery Land Surveys Limited | Administrative & support | 2009 |
| Chingford Sports Limited | Education | 2023 |
| Chino Club UK Ltd | Wholesale & retail | 2023 |
| Chinook (One) Management Company Limited | Households | 1991 |
| Chinook (Two) Management Company Limited | Households | 1991 |
| Chippies Limited | Administrative & support | 2026 |
| Chipping Hill (Witham) Management Company Limited | Households | 2004 |
| Chirocentral Ltd | Wholesale & retail | 2026 |
| Chiswell Phase 2 Management Limited | Households | 2015 |
| CHK Rail Solutions Ltd | Construction | 2017 |
| CHO Investment Limited | Professional & scientific | 2022 |
| Chocodolly Limited | Wholesale & retail | 2012 |
| Choda House Limited | Households | 2010 |
| Choda House Retirement Management Company Limited | Health & social care | 2011 |
| Choice Marketing Group Limited | Administrative & support | 2024 |
| Chopin Management Limited | Wholesale & retail | 2019 |
| Chosen Gardening Limited | Wholesale & retail | 2019 |
| Chosen Seeds Limited | Wholesale & retail | 2016 |
| Chota Solutions Limited | Professional & scientific | 2009 |
| Chris Fearis Limited | Construction | 2002 |
| Chris Giddings Limited | Manufacturing | 2003 |
| Chris Giddings Property Limited | Real estate | 2015 |
| Chris GUY Limited | Construction | 1998 |
| Chris Haigh Goalkeeping Limited | Arts & recreation | 2019 |
| Chris Neal Limited | Administrative & support | 2003 |
| Chris Penk Limited | Information & communication | 2021 |
| Chris Tivey Associates Ltd | Professional & scientific | 2012 |
| Chris-Maya Consultancy Limited | Information & communication | 2021 |
| Chrisbak Limited | Health & social care | 2016 |
| Chrishoney Ltd | Transport & logistics | 2017 |
| Christchurch Square Limited | Households | 2001 |
| Christian Corner Shop Ltd | Wholesale & retail | 2026 |
| Christian Youth Ministries | Other services | 1999 |
| Christmaslightsandtrees Ltd | Wholesale & retail | 2021 |
| Christopher James Installations Limited | Construction | 2016 |
| Chromsens Ltd | Information & communication | 2010 |
| Chrys Dimitriou Eyecare Limited | Health & social care | 2019 |
| Chrysalis Park Stevenage Management Company Limited | Households | 2010 |
| CHU Holdings Ltd | Professional & scientific | 2026 |