| Ccai Ltd | Manufacturing | 2022 |
| Ccard Electronic Systems Ltd | Other services | 2020 |
| CCM Rigging and Transport Limited | Transport & logistics | 2025 |
| CCS Management Ltd | Other services | 2026 |
| CCS Scaffolding Holdings UK Limited | Financial services | 2022 |
| CCS Scaffolding Limited | Construction | 2011 |
| Ccsc Limited | Construction | 2018 |
| CDH Commercial Management Limited | Professional & scientific | 2014 |
| Cdot Consultants Ltd | Information & communication | 2014 |
| CE & NT Limited | Wholesale & retail | 2016 |
| CEC Leisure UK Ltd | Financial services | 2024 |
| Ceceam Decor Ltd | Professional & scientific | 2026 |
| Cecil Court Management Company (Ashford) Limited | Households | 1975 |
| CED BJS Vigo Limited | Real estate | 2020 |
| Ceemee Enterprise Ltd | Other services | 2019 |
| Ceemee Holdings Limited | Wholesale & retail | 2025 |
| Celebrate Pets Ltd | Professional & scientific | 2013 |
| Celestial Coffee Ltd | Hospitality | 2026 |
| Celestial Media Limited | Hospitality | 2000 |
| Celik Pipefitting Ltd | Manufacturing | 2020 |
| Celine Health Ltd | Professional & scientific | 2023 |
| CEM Drylining Ltd | Construction | 2021 |
| Cemport Limited | | 1981 |
| Cenc Ltd | Transport & logistics | 2025 |
| Centra Care Ltd | Health & social care | 2024 |
| Central Park Track and Field Limited | Arts & recreation | 1993 |
| Central Rigging Company Limited | Information & communication | 2023 |
| Central Services Limited | Real estate | 2006 |
| Centralized Systems (UK) Ltd | Administrative & support | 2022 |
| Centurian Design and Build Ltd | Construction | 2016 |
| Ceptivion Ltd | Professional & scientific | 2025 |
| Cerbera V8 Developments Limited | Real estate | 2020 |
| Cerberus K9 Ltd | Administrative & support | 2022 |
| Certified Ents Ltd | Arts & recreation | 2026 |
| Cetting Ltd | Manufacturing | 2025 |
| Cetus Services Limited | Real estate | 2019 |
| Ceylon Spirits by Vishru Ltd | Wholesale & retail | 2025 |
| CF Drylining Group Ltd | Construction | 2018 |
| Cfuller Consultancy Ltd | Health & social care | 2019 |
| CG Structures Limited | Construction | 2019 |
| CGM Property Ltd | Real estate | 2024 |
| Chalk 'N' Teas Ltd | Hospitality | 2021 |
| Chalmers Wholesalers Limited | Wholesale & retail | 1970 |
| Chamak Chaii Ltd | Wholesale & retail | 2024 |
| Chand Chumber Construction Limited | Construction | 2019 |
| Chandan & Bani Properties Limited | Real estate | 2019 |
| Chandlers Wharf (One) Residents Management Company Limited | Households | 2001 |
| Chandured Ltd | Wholesale & retail | 2025 |
| Changing Faces Fit-Out Ltd | Construction | 2012 |
| Chang’S Consultancy Firm Ltd | Professional & scientific | 2025 |
| Channel Computers Limited | Information & communication | 1991 |
| Chant Gardening Services Limited | Administrative & support | 2019 |
| Charing Green Property Management Limited | Households | 2004 |
| Charles Agha & Co Ltd | Construction | 2015 |
| Charles Edward (Station Road) Limited | Real estate | 2017 |
| Charlie Marie Panayi Ltd | Extraterritorial | 2024 |
| Charlie Marie Smart Ltd | Extraterritorial | 2024 |
| Charlwood Interiors Ltd | Construction | 2009 |
| Chartwell Court Residents Company Limited | Households | 2000 |
| Chartwell Lettings Limited | Real estate | 2013 |
| Chauffeur Rides Limited | Transport & logistics | 2023 |
| Chauffeur Star Limited | Transport & logistics | 2024 |
| CHC Entertainment Holdings Ltd | Financial services | 2025 |
| Cheap Cleaning TCL Ltd | Other services | 2015 |
| Cheapfare Travelers Ltd | Information & communication | 2025 |
| Checkaroof Limited | Construction | 2025 |
| Cheema Commercial Ltd | Real estate | 2022 |
| Cheema Construction Limited | Extraterritorial | 2003 |
| Cheema Developments Limited | Real estate | 2018 |
| Cheema Holdings Limited | Professional & scientific | 2001 |
| Cheezycone Ltd | Hospitality | 2025 |
| Chelson Court Residents Company Limited | Households | 1983 |
| Chemfeed Limited | Manufacturing | 2014 |
| Chemkay Limited | Health & social care | 2015 |
| Chemmarkai Limited | Education | 2026 |
| Chernor's and Family Ltd | Transport & logistics | 2022 |
| Cherry Tree Events Limited | Administrative & support | 2002 |
| Cherry Tree Storage Limited | Transport & logistics | 2019 |
| Cherrycroft Investments Ltd | Financial services | 2024 |
| Cheser Healthcare Limited | Health & social care | 2015 |
| Chettleburgh's Limited | Administrative & support | 1958 |
| Chez Ventures Limited | Health & social care | 2022 |
| Chez&Diamond Properties Ltd | Real estate | 2025 |
| Chhavi Realty Limited | Real estate | 2025 |
| Chic Event Hire Limited | Administrative & support | 2014 |
| Chicane Events Ltd | Arts & recreation | 2020 |
| Chicken Kingz Limited | Hospitality | 2024 |
| Chicken World Gravesend Ltd | Hospitality | 2025 |
| Chickenish Ltd | Hospitality | 2017 |
| Chidex Care Limited | Health & social care | 2018 |
| Chilled Limited | Other services | 2022 |
| Chimera Brands Ltd | Manufacturing | 2025 |
| CHIRA71 Transport Ltd | Transport & logistics | 2016 |
| Chirutrans Ltd | Transport & logistics | 2011 |
| Chisho Drylining Ltd | Construction | 2023 |
| Chiwas Limited | Real estate | 2020 |
| Choice Auto Group Ltd | Wholesale & retail | 2022 |
| Chris Carp Limited | Transport & logistics | 2015 |
| Chris Logistic Limited | Transport & logistics | 2018 |
| Chris Parry Jewellery Ltd | Other services | 2023 |