| CS Beauty Leicester Limited | Other services | 2018 |
| CS Body Repair Ltd | Wholesale & retail | 2026 |
| CS BSL Interpreting Service Ltd | Professional & scientific | 2025 |
| CS Car Wash Ltd | Administrative & support | 2026 |
| CS Cleaning Supplies Ltd | Manufacturing | 2024 |
| CS Commerce Ltd | Wholesale & retail | 2022 |
| CS Express Ltd | Hospitality | 2024 |
| CS FM Ltd | Administrative & support | 2023 |
| CS Gates Fabrication Ltd | Manufacturing | 2023 |
| CS Green & Co Ltd | Other services | 2013 |
| CS Kington Limited | Hospitality | 2023 |
| CS Legal Holdings Limited | Financial services | 2023 |
| CS Lines Cruzeiro DO SUL Limited | Administrative & support | 2020 |
| CS Property Management Solutions Ltd | Real estate | 2021 |
| CS Roof Care Ltd | Construction | 2026 |
| CS Sister Properties Limited | Real estate | 2022 |
| CS Surveillance Ltd | Administrative & support | 2026 |
| CS Topco 1 Ltd | Other services | 2025 |
| CS UK Recruitment Limited | Administrative & support | 2013 |
| CS002 Limited | Real estate | 2020 |
| CSA Consulting and Management Services Ltd | Real estate | 2022 |
| CSA Financial Accountants Limited | Professional & scientific | 2021 |
| Csalex Ltd | Other services | 2025 |
| CSB Secure Limited | Information & communication | 2016 |
| Csbaker Properties Limited | Real estate | 2022 |
| CSC Properties (Midlands) Ltd | Real estate | 2021 |
| Cscom Realisations 2025 Limited | Wholesale & retail | 2008 |
| Cseeker Limited | Administrative & support | 2014 |
| Csege 24/7 Limited | Health & social care | 2020 |
| CSG Bidco Limited | Financial services | 2011 |
| CSG Equityco Limited | Financial services | 2011 |
| CSG Managment Ltd | Professional & scientific | 2023 |
| CSG Propco Realisations 2025 Limited | Financial services | 2017 |
| Csgb Holdings Limited | Financial services | 2026 |
| Csgroves Ltd | Other services | 2016 |
| CSI (ST Pauls) Management Company Limited | Real estate | 2017 |
| CSI Art Building Ltd | Construction | 2025 |
| CSI Direct Ltd | Wholesale & retail | 2022 |
| CSJ Coil Trading Limited | Manufacturing | 1997 |
| CSJ Group Limited | Wholesale & retail | 2019 |
| CSK Legal Limited | Professional & scientific | 2014 |
| CSL Associates Limited | Information & communication | 2012 |
| CSL Secretaries Limited | Professional & scientific | 2002 |
| CSM Consulting Engineers Limited | Professional & scientific | 2023 |
| Csmpk Ltd | Other services | 2025 |
| CSN Entertainment Ltd | Other services | 2019 |
| CSO Transport Limited | Transport & logistics | 2016 |
| CSOLUTIONS4U Ltd | Information & communication | 2012 |
| CSP (GB) Limited | Financial services | 2004 |
| CSR Maintenance Limited | Construction | 2026 |
| CSR Scientific Training Limited | Professional & scientific | 2007 |
| Csrt Ltd | Transport & logistics | 2025 |
| CSS Traders Ltd | Wholesale & retail | 2024 |
| CSS Training Division Ltd | Other services | 2022 |
| Cssc Limited | Other services | 2015 |
| Cssh Investments Ltd | Real estate | 2024 |
| CST Logistics by NIM Limited | Transport & logistics | 2025 |
| CST PUB Company Ltd | Hospitality | 2025 |
| Csuuv Limited | Construction | 2024 |
| CSZ Properties Limited | Real estate | 2018 |
| CT & GT Services Limited | Professional & scientific | 2022 |
| CT Accounting Limited | Professional & scientific | 2016 |
| CT Eco Solutions Limited | Construction | 2014 |
| CT Employment Law Limited | Professional & scientific | 2019 |
| CT Global Freight Audit Limited | Financial services | 2009 |
| CT Hereford Limited | Real estate | 2019 |
| CT Member Limited | Professional & scientific | 2017 |
| CT Online Limited | Wholesale & retail | 2016 |
| CT Security Solutions Ltd | Administrative & support | 2019 |
| CT Southampton Limited | Hospitality | 2024 |
| Ct.Azur LLP | | 2024 |
| CTA Property & Acquisition's Ltd | Real estate | 2025 |
| CTB Alarm Systems Ltd | Administrative & support | 2016 |
| CTB Alarms Limited | Administrative & support | 2007 |
| CTC Publishing Ltd | Extraterritorial | 2023 |
| CTC Training and Consultancy Limited | Education | 2009 |
| Ctec Design and Build Limited | Professional & scientific | 2016 |
| Ctferlance Ltd | Transport & logistics | 2024 |
| CTG Festim Ltd | Hospitality | 2026 |
| Ctgg UK Ltd | Other services | 2023 |
| CTM Business Services Ltd | Administrative & support | 2020 |
| CTM Plumbing and Heating Ltd | Manufacturing | 2024 |
| CTM Property Services Ltd | Real estate | 2025 |
| CTM Residential LLP | | 2011 |
| CTO Property Investments Ltd | Real estate | 2023 |
| CTO Serviced Accommodation Ltd | Real estate | 2019 |
| CTP Catering Limited | Hospitality | 2024 |
| Ctrl Room Ltd | Other services | 2021 |
| Ctrl Training Ltd | Administrative & support | 2023 |
| CTS Bham Ltd | Administrative & support | 2018 |
| CTS Birmingham Ltd | Transport & logistics | 2018 |
| CTS Environmental Management Limited | Agriculture & fishing | 2015 |
| CTT Technology (UK) Limited | Manufacturing | 2019 |
| Cttm Trustees Limited | Professional & scientific | 2015 |
| Ctukmedia Ltd | Information & communication | 2023 |
| CU Worldwide Shipping Limited | Transport & logistics | 2019 |
| Cubagua Limited | Administrative & support | 2020 |
| Cubane Ltd | Professional & scientific | 2019 |
| Cubbi App Ltd | Professional & scientific | 2024 |
| Cube Contracts Ltd | Construction | 2020 |