| Chanmill (Plant & Equipment) Limited | Professional & scientific | 1995 |
| Chapel Quarter Freehold Limited | Households | 2022 |
| Chapleau Ltd | Professional & scientific | 2026 |
| Chapter 27 Ltd | Real estate | 2026 |
| Chapter 31 Ltd | Professional & scientific | 2026 |
| Charco Property Limited | Real estate | 2026 |
| Charles Ivey (Specialist Cars) Limited | Wholesale & retail | 1991 |
| Charlotte Wilde Ltd | Other services | 2018 |
| Charlton House Management Co. Limited | Households | 1973 |
| Charm Essentials Limited | Other services | 2008 |
| Charm Nails & Spa Ltd | Other services | 2024 |
| Chase Software Solutions Limited | Information & communication | 2015 |
| Chasma Motors Ltd | Administrative & support | 2025 |
| Chaudhry Nummero Infra( London) Ltd | Construction | 2022 |
| Chellbrook Properties Limited | Real estate | 1988 |
| Chelsea Cars ( UK) Limited | Transport & logistics | 2008 |
| Chen Advisory Ltd | Professional & scientific | 2026 |
| Chenaar Limited | Real estate | 2015 |
| Chene Colline Court Management Company Limited | Households | 1996 |
| Chesney Payet Copywriting Ltd | Professional & scientific | 2024 |
| Chesterfield Court (Surbiton) Residents Association Limited | Households | 1962 |
| Chettinadu Aachi Masala Ltd | Wholesale & retail | 1992 |
| Chiara Ronchi Limited | Professional & scientific | 2019 |
| Chih TAC Supply Chain (UK) Ltd | Transport & logistics | 2007 |
| Chilton Court Maintenance Limited | Administrative & support | 1969 |
| Chilton Court Residents Association Limited | Hospitality | 1995 |
| Chinese Health Spa Ltd | Health & social care | 2020 |
| Chinese Panda Ltd | Hospitality | 2026 |
| Cholar Limited | Real estate | 2021 |
| Chop IT AI Ltd | Information & communication | 2026 |
| Choppers Ltd | Other services | 2003 |
| Chris Chapman Creative Consultancy Limited | Professional & scientific | 2024 |
| Chris Haynes Consulting Ltd | Professional & scientific | 2017 |
| Christian Price Consulting Ltd | Professional & scientific | 2021 |
| Christine Fast Services Ltd | Administrative & support | 2017 |
| Christine Services Ltd | Administrative & support | 2020 |
| CHS Tour Services Ltd. | Administrative & support | 1998 |
| Chums Clearance Ltd | Water & waste | 2021 |
| Chunk Limited | Administrative & support | 2015 |
| Church Fields (Addlestone) Management Company Limited | Households | 2009 |
| Church Hill Road Ltd | Real estate | 2024 |
| Cinesthetic Visuals Ltd | Professional & scientific | 2021 |
| Cipher Stream Limited | Financial services | 2009 |
| Circle I Property UK Ltd | Real estate | 2025 |
| Citi Logistics PVT Ltd | Wholesale & retail | 2025 |
| City Caphe Ltd | Hospitality | 2010 |
| City Flow Screed Limited | Construction | 2026 |
| City Sense Limited | Administrative & support | 2007 |
| Citydraft Limited | | 1985 |
| Cityq UK Ltd | Wholesale & retail | 2021 |
| CJ Danchie Estate Ltd | Real estate | 2024 |
| Cjls Consulting Limited | Professional & scientific | 2016 |
| Cjwd Developments Ltd | Construction | 2020 |
| CKN Consult Ltd | Professional & scientific | 2019 |
| Ckod Limited | Health & social care | 2020 |
| Claerwen Property Investments Ltd | Real estate | 2021 |
| Claire Hall Associates Ltd | Administrative & support | 2019 |
| Clapham Common Operating Limited | Hospitality | 2026 |
| Clapham Common Property Limited | Real estate | 2026 |
| Claremont Akinita Ltd | Real estate | 2025 |
| Clarity Marketeer Limited | Professional & scientific | 2021 |
| Clarity Ventures Ltd. | Administrative & support | 2015 |
| Clarke Film & TV Consultancy Ltd | Professional & scientific | 2025 |
| Clarus Finance Limited | Professional & scientific | 2014 |
| Claycorn Court (Claygate) Limited | Households | 2007 |
| Clean Crystal Ltd | Administrative & support | 2022 |
| Cleaner Windows 4 YOU Limited | Administrative & support | 2025 |
| Clear & Recycle Ltd | Water & waste | 2021 |
| Cleonix Cleaning Ltd | Administrative & support | 2025 |
| Clinicalpm Ltd | Professional & scientific | 2022 |
| Clinicians in Community Limited | Real estate | 2012 |
| Clive Powell Limited | Professional & scientific | 2007 |
| Cloud Iris Ltd | Other services | 2023 |
| Clyde House Management (Kingston) Limited | Administrative & support | 1982 |
| CMS Global Solutions Ltd | Information & communication | 2019 |
| CMW Advisory Limited | Professional & scientific | 2022 |
| CNT9 Ltd | Wholesale & retail | 2016 |
| Coach Chris Gymnastics Ltd | Arts & recreation | 2025 |
| Coactimed Ltd | Professional & scientific | 2016 |
| Coalescence Engineering Ltd | Professional & scientific | 2018 |
| COB Thorn Flats 1 & 2 RTM Company Limited | Households | 2020 |
| COB Thorn Flats 3 & 4 RTM Company Limited | Households | 2020 |
| Coda (Brighton) Limited | Real estate | 2023 |
| Code Exact Labs Ltd | Information & communication | 2026 |
| Code IT Ltd | Information & communication | 2014 |
| Coeus Group International Limited | Financial services | 2025 |
| Coffee on the Corner Surbiton Ltd | Manufacturing | 2019 |
| Coherenz Ltd | Health & social care | 2025 |
| Cokesco Limited | Arts & recreation | 2012 |
| Colab Health Limited | Professional & scientific | 2007 |
| Coldtec Ltd | Professional & scientific | 2021 |
| Cole & Sharp Securities Limited | Real estate | 1964 |
| Cole and Sharp Limited | Information & communication | 1951 |
| Colin’S Canine Customs Ltd | Wholesale & retail | 2024 |
| Collective Carts Ltd | Wholesale & retail | 2025 |
| College Court Communications Limited | Information & communication | 2003 |
| College Drive Residents Limited | Households | 2011 |
| Colliers Wood Investments Limited | Real estate | 2012 |
| Collini Cutlery Services Limited | Hospitality | 2003 |
| Collins Moore Limited | Professional & scientific | 2013 |