| Chaya Interiors Ltd | Administrative & support | 2012 |
| Chaz.E.Properties Ltd | Real estate | 2021 |
| Cheap Scaffolding Ltd | Construction | 2025 |
| Cheapside Estates Holdings Limited | Real estate | 2016 |
| Cheapside Estates Limited | Real estate | 2009 |
| Check Financial Limited | Financial services | 2025 |
| Check for YOU Ltd | Administrative & support | 2025 |
| Check My Will Ltd | Other services | 2026 |
| Checkline House (Head Lease) Limited | Extraterritorial | 2015 |
| Checkridge Limited | Professional & scientific | 1978 |
| Chedderton Limited | Information & communication | 2021 |
| Cheeky Monkey London Ltd | Wholesale & retail | 2004 |
| Cheesecakescafe Ltd | Hospitality | 2020 |
| Cheezy Pizza & Foods Ltd | Hospitality | 2024 |
| Chef Muroora Ltd | Hospitality | 2025 |
| Chefleen Ltd | Hospitality | 2025 |
| Cheikh Rouhou Limited | Professional & scientific | 2013 |
| Chelles Occasions Ltd | Hospitality | 2014 |
| Chelsea Anaesthesia Limited | Health & social care | 2010 |
| Chelsea Fulham Plastering Ltd | Construction | 2026 |
| Chelsea OS Ltd | Health & social care | 2025 |
| Chelvy Estates Ltd | Real estate | 2021 |
| Chemilab Limited | Wholesale & retail | 2002 |
| Chen Financial Ltd | Professional & scientific | 2026 |
| Chen Medical Ltd | Wholesale & retail | 2020 |
| Chen WU Property Limited | Real estate | 2023 |
| Cheniston Search Limited | Administrative & support | 2014 |
| Chenselk Online Limited | Information & communication | 2022 |
| Chepstow Services Limited | Professional & scientific | 2015 |
| Chequers (Pinner) Residents Management Limited (the) | Households | 1975 |
| Cherry Orchard (Ealing) Residents Management Limited | Real estate | 2003 |
| Cherry Orchard Flats (Ealing) Residents Management Limited | Real estate | 2002 |
| Chesham Close Management Limited | Real estate | 2013 |
| Chesham School Uniforms Ltd | Wholesale & retail | 2023 |
| Cheshunt Hand Car Wash Ltd | Other services | 2018 |
| Chess Structural Consultants Ltd | Administrative & support | 2005 |
| Chess Structural Holdings Limited | Administrative & support | 2018 |
| Chessum Consultancy Ltd | Professional & scientific | 2012 |
| Chester 13 Limited | Professional & scientific | 2007 |
| Chester Court Property Limited | Households | 1992 |
| Chester IT Consultants Limited | Information & communication | 2026 |
| Chester Security Services Limited | Administrative & support | 2018 |
| Chestnut Court (Watford) Management Limited | Households | 1991 |
| Chevere Consulting Limited | Professional & scientific | 2012 |
| Chevin IT Consulting Ltd | Information & communication | 2014 |
| Chevron Investments (Holding) Ltd | Financial services | 2019 |
| Cheza Cricket Academy Limited | Education | 2023 |
| Chezne Clothing Limited | Wholesale & retail | 2017 |
| CHG Inter-Trading Ltd | Wholesale & retail | 2008 |
| Chhaya Hare Wilson CML Limited | Professional & scientific | 2018 |
| Chhaya Hare Wilson Limited | Professional & scientific | 2007 |
| Chibi Ltd | Administrative & support | 2026 |
| Chichele Mansions Management Company Limited | Real estate | 1966 |
| Chicken Basket Ltd | Hospitality | 2019 |
| Chicken Hub Watford Ltd | Hospitality | 2024 |
| Chicken on Demand Ltd | Hospitality | 2025 |
| Chicken Piri Ltd | Hospitality | 2025 |
| Chickpea Engineering Ltd | Professional & scientific | 2026 |
| Chief A.A Ltd | Information & communication | 2024 |
| Chief Enterprises Ltd | Households | 2024 |
| Chigs T PT Ltd | Arts & recreation | 2018 |
| Chilcott Accountants Limited | Professional & scientific | 2016 |
| Child Health Together Ltd | Health & social care | 2024 |
| Chill&Bee Limited | Administrative & support | 2024 |
| Chilli Daddy’S Ltd | Hospitality | 2025 |
| Chilligecko Limited | Information & communication | 2017 |
| Chiltern Asset Management Limited | Real estate | 2003 |
| Chiltern Hemp Limited | Agriculture & fishing | 2019 |
| China Bull Research Ltd | Professional & scientific | 2020 |
| China Presentations (Wembley) Limited | Wholesale & retail | 1977 |
| China UK Technology and Innovation Platform Limited | Construction | 2018 |
| Chip Analytics Ltd | Information & communication | 2025 |
| Chippy Dave Ltd | Construction | 2015 |
| Chira Construction Ltd | Construction | 2019 |
| Chiswell Management Limited | Households | 2014 |
| Chitim Holdings Ltd | Information & communication | 2025 |
| Chiverton Railway & Construction Services Ltd | Construction | 2016 |
| Chivtech Engineering Limited | Construction | 2016 |
| Chizè Jewellery Ltd | Manufacturing | 2025 |
| CHK Construction Limited | Construction | 2023 |
| CHK Solutions Ltd | Health & social care | 2025 |
| Chlobelle Limited | Professional & scientific | 2010 |
| Chloedigital Limited | Information & communication | 2013 |
| Choice Global Limited | Professional & scientific | 2004 |
| Choice Lettings Limited | Construction | 1994 |
| Choice Property Investments Limited | Real estate | 2016 |
| Cholaa Soft Limited | Information & communication | 2016 |
| Chook Chook Indian Railway Kitchen Ltd | Hospitality | 2019 |
| Chopaz Ltd | Transport & logistics | 2023 |
| Chorleywood Cars Limited | Transport & logistics | 2015 |
| Chorleywood Health Care Limited | Health & social care | 2009 |
| Chorleywood MOT & Service Centre Ltd | Wholesale & retail | 2020 |
| Choudhary Builders Ltd | Construction | 2021 |
| Choudhrey & Shah Investments Limited | Real estate | 2005 |
| Choudhrey Consultancy Limited | Professional & scientific | 2016 |
| Chow Bella Limited | Wholesale & retail | 2020 |
| Chremex Consulting Ltd | Professional & scientific | 2026 |
| Chris Kelly Developments Limited | Construction | 2015 |
| Chris Property Group Ltd | Real estate | 2026 |
| Chris Renovation Ltd | Construction | 2021 |