| Castle View Medical Reporting Limited | Health & social care | 2025 |
| Castlegate Lettings (Hudds) Ltd | Wholesale & retail | 2021 |
| Castlehill Global Ltd | Real estate | 2011 |
| Casual Realm Ltd | Wholesale & retail | 2020 |
| Catalyst Global Partners Ltd | Administrative & support | 2025 |
| Catalyst Human & Business Performance Ltd. | Manufacturing | 2023 |
| Catch on Fashion Solutions Limited | Wholesale & retail | 2000 |
| Cater-Trailer Limited | Manufacturing | 2005 |
| Caterers Choice Holdings Limited | Financial services | 2025 |
| Caterers Choice Limited | Wholesale & retail | 1988 |
| Cathedral House Care Services Limited | Other services | 2018 |
| Cathedral House Events and Hospitality Ltd | Administrative & support | 2024 |
| Cathena Solutions Ltd | Information & communication | 2020 |
| Catherine M Harrison Ltd | Health & social care | 2018 |
| Catherine Merrick Ltd | Professional & scientific | 2011 |
| Causeway Financial Services Limited | Professional & scientific | 2016 |
| Cava Leisure Ltd | Hospitality | 2019 |
| Cavewell Gardens Management Company Limited | Real estate | 2008 |
| Cavian Properties Ltd | Real estate | 2025 |
| CB Asset Management Limited | Real estate | 2025 |
| CB Engineering Ltd | Professional & scientific | 2022 |
| CB Farrow Holdings Ltd | Construction | 2024 |
| CBI Projects Ltd | Construction | 2014 |
| Cbloxx Studios Ltd | Arts & recreation | 2026 |
| CBR Advisory Limited | Professional & scientific | 2024 |
| CBW Installations Ltd | Construction | 2026 |
| CC Joinery Ltd | Construction | 2024 |
| CC63 Momentum Ltd | Administrative & support | 2025 |
| Ccjl Ices Limited | Wholesale & retail | 2022 |
| Ccom Ltd | Other services | 2016 |
| Cdcnurseries Limited | Health & social care | 2015 |
| CDS Clarke Development Solutions Ltd | Construction | 2025 |
| CE Shareholder Ltd | Professional & scientific | 2025 |
| Cedar Dental Ltd | Health & social care | 2024 |
| Cedar Glen Lettings Ltd | Real estate | 2025 |
| Celebration Cottages Limited | Administrative & support | 2015 |
| Celine Courier Ltd | Transport & logistics | 2024 |
| Celos Wines Limited | Other services | 2002 |
| CEM Auty Ltd | Professional & scientific | 2021 |
| CEM Financial Solutions Limited | Financial services | 2023 |
| Cema Lighting Group Limited | Manufacturing | 2022 |
| Cenax Ltd | Manufacturing | 2026 |
| Centerforce International Limited | Professional & scientific | 2015 |
| Central & Provincial (FC100) Limited | Financial services | 2024 |
| Central & Provincial Developments Limited | Construction | 1996 |
| Central & Provincial Investments Limited | Professional & scientific | 2022 |
| Central and Provincial Properties Limited | Construction | 1988 |
| Centre for Hizmet Studies Ltd. | Information & communication | 2015 |
| Centrifugal Engineering Limited | Manufacturing | 1970 |
| Centrifuge Engineering Services Ltd | Professional & scientific | 2009 |
| Centurion Fire and Security Ltd | Other services | 1991 |
| Centurion Racing Limited | Professional & scientific | 2019 |
| Century Interiors and Home Enhancements Ltd | Wholesale & retail | 2025 |
| Certified 2 Marry Ltd | Education | 2024 |
| Certified Compliance Ltd | Construction | 2024 |
| Certified Health Ltd | Manufacturing | 2020 |
| Certis Accountants Limited | Professional & scientific | 2015 |
| Certis Properties Limited | Real estate | 2024 |
| Cesd Consulting Limited | Professional & scientific | 2024 |
| CET Consultants Ltd | Administrative & support | 2018 |
| Ceva Safety Services Limited | Administrative & support | 2019 |
| Ceylon Primeleaf Limited | Wholesale & retail | 2026 |
| CF Catering Services Ltd | Hospitality | 2024 |
| CF Links Ltd | Information & communication | 2016 |
| CFP Care Ltd | Health & social care | 2024 |
| CFS Holdings Ltd | Administrative & support | 2004 |
| CG Productions Ltd | Information & communication | 2017 |
| CG79 Ltd | Arts & recreation | 2025 |
| Cgmr Properties Limited | Real estate | 2024 |
| Cgms Electrical Contractors Ltd | Construction | 2025 |
| CGS Building & Construction Limited | Construction | 2017 |
| CH Rasheed & Sons UK Ltd | Real estate | 2025 |
| Chaii Lounge Limited | Hospitality | 2025 |
| Chaii Sabz CIC | Hospitality | 2025 |
| Chaiii Wala by Irfan Limited | Hospitality | 2025 |
| CHAIN2GRAIN Ltd | Agriculture & fishing | 2022 |
| Chainreaxtion Limited | Wholesale & retail | 2017 |
| Chak 33 Ltd | Real estate | 2025 |
| Challis Consulting Limited | Administrative & support | 2017 |
| Chamberlain Coatings Limited | Professional & scientific | 1995 |
| Chamberlains Coffee & Cakes Limited | Wholesale & retail | 2021 |
| Chan Khangura Limited | Administrative & support | 2012 |
| Chance Giveaways Ltd | Arts & recreation | 2025 |
| Chanda Stores Limited | Wholesale & retail | 2011 |
| Chandigarh Foods Ltd | Hospitality | 2025 |
| Chanico Property Holdings Limited | Real estate | 2026 |
| Channon Mcleod Property Group Ltd | Real estate | 2022 |
| Chaos Bar Ltd | Hospitality | 2022 |
| Chapel Hill Accountants & Management Consultants Ltd | Professional & scientific | 2007 |
| Chapelgate Properties Ltd | Real estate | 2025 |
| Chapgreen Properties Ltd | Hospitality | 2021 |
| Chapmans Construction Services Limited | Construction | 2019 |
| Charal Lettings Ltd | Real estate | 2023 |
| Charitea Global Limited | Manufacturing | 2024 |
| Charles Alexander Finance (Security) Limited | Financial services | 2017 |
| Charles Alexander Finance Limited | Financial services | 2015 |
| Charlesworth China Limited | Extraterritorial | 2010 |
| Charlesworth Commercial Properties Limited | Real estate | 2015 |
| Charlesworth Estates Limited | Real estate | 2014 |
| Charlesworth Family Group Limited | Financial services | 2015 |