| Coretech Construction Group Ltd | Construction | 2020 |
| Coretek Solutions Limited | Information & communication | 2020 |
| Corevia Axentra Solutions Ltd | Extraterritorial | 2026 |
| Coreviia Ltd | Wholesale & retail | 2025 |
| Corex Pool Ltd | Construction | 2025 |
| Corexa Ironyx Systems Ltd | Extraterritorial | 2026 |
| Corexa Valnix Trading Ltd | Extraterritorial | 2026 |
| Coreyprime Ltd | Wholesale & retail | 2026 |
| Corez Limited | Wholesale & retail | 2026 |
| Corfe Estates Ltd | Real estate | 2022 |
| Corhive Ltd | Households | 2024 |
| Corhivelogistics Ltd | Transport & logistics | 2026 |
| Coriander Restaurant 2 Limited | Hospitality | 2015 |
| Coriander Restaurant Ltd | Hospitality | 2014 |
| Corinium Properties Limited | Extraterritorial | 1964 |
| Corinne Kearns Limited | Professional & scientific | 2025 |
| Corinth Business and Community Training C.I.C. | Education | 2020 |
| Corinth Education C.I.C. | Education | 2026 |
| Corinthian Architectural Aluminium Limited | Manufacturing | 2020 |
| Corium Clothing Ltd | Wholesale & retail | 2020 |
| Cork and Bean Ltd | Hospitality | 2020 |
| Cork Street Properties Limited | Construction | 2000 |
| Cork Street Properties Management Limited | Professional & scientific | 1971 |
| Corlea Limited | Administrative & support | 1992 |
| Corless Developments Ltd | Construction | 2023 |
| Corless Ltd | Real estate | 2021 |
| Corlett Carpentry Limited | Construction | 2005 |
| Cormorant Subsea Ltd | Administrative & support | 2017 |
| Corn Products UK Finance LP | | 2010 |
| Corn Property Services Limited | Real estate | 2026 |
| Cornbrook House Limited | Real estate | 2022 |
| Cornbrook Metal Recycling Holding Ltd | Financial services | 2021 |
| Cornbrook Metal Recycling Limited | Water & waste | 2003 |
| Cornel Drylining Ltd | Construction | 2016 |
| Cornellius Healthcare Ltd. | Administrative & support | 2013 |
| Cornellius Pool Cars Ltd | Wholesale & retail | 2023 |
| Cornels Traders Limited | Wholesale & retail | 2023 |
| Corner House Design and Print Limited | Manufacturing | 1997 |
| Corner Lodge Limited | Administrative & support | 2010 |
| Corner Lounge (Irlam) Limited | Hospitality | 2023 |
| Corner Shop Drop Ltd | Wholesale & retail | 2020 |
| Corner Shop UK1 Ltd | Wholesale & retail | 2026 |
| Corner Stone AP 1 Ltd | Real estate | 2025 |
| Corner Stone Export Company Ltd | Wholesale & retail | 2026 |
| Corner Stone MCR Ltd | Real estate | 2022 |
| Corner Stone MCR Property Group Ltd | Real estate | 2023 |
| Corner Stone WIG 1 Ltd | Real estate | 2025 |
| Corner Wearables Ltd | Manufacturing | 2015 |
| Cornerhouse Apartments Ltd. | Households | 2003 |
| Cornerhouse Investments LLP | | 2010 |
| Cornerhouse Publications Ltd | Wholesale & retail | 2015 |
| Cornerstone Commercial Assets Ltd | Real estate | 2025 |
| Cornerstone Construct and Maintain Ltd | Construction | 2018 |
| Cornerstone Day Centre Ltd | Health & social care | 2025 |
| Cornerstone Development Services Ltd | Construction | 2021 |
| Cornerstone DS Logistics Ltd | Health & social care | 2022 |
| Cornerstone General Trading Limited | Extraterritorial | 2026 |
| Cornerstone Haven Ltd | Real estate | 2025 |
| Cornerstone Initiatives Limited | Real estate | 2019 |
| Cornerstone MCR Group Ltd | Hospitality | 2026 |
| Cornerstone Properties (Durham) Ltd | Real estate | 2021 |
| Cornerstone Properties (Investments) Ltd | Real estate | 2022 |
| Cornerstone Quantity Surveyors Limited | Administrative & support | 2009 |
| Cornerstone SLT Ltd | Health & social care | 2025 |
| Cornerstone Support Ltd | Health & social care | 2023 |
| Cornerstone Training Limited | Real estate | 2021 |
| Cornhill Coffee Rentals Ltd | Administrative & support | 2022 |
| Cornhill Kindergarten Limited | Administrative & support | 2004 |
| Cornish Bay Limited | Administrative & support | 2008 |
| Cornish Fish & Grill Ltd | Hospitality | 2025 |
| Cornish Hall Management Company Limited | Households | 2017 |
| Cornlea Consulting Limited | Hospitality | 2013 |
| Corns Exchange Ltd | Professional & scientific | 2019 |
| Cornwall Channel Limited | Information & communication | 2013 |
| Cornwall Consulting Limited | Administrative & support | 2016 |
| Cornwall Enterprises Limited | Administrative & support | 2024 |
| Cornwall Ltd | Wholesale & retail | 2023 |
| Cornwall Properties Ltd | Real estate | 2022 |
| Cornwall Rugby League Football Club Limited | Administrative & support | 2016 |
| Cornwall Street Storage Limited | Households | 2023 |
| Cornwall TEK Limited | Other services | 2023 |
| Coronation Retail Limited | Wholesale & retail | 2016 |
| Coronet Care & Support Ltd | Administrative & support | 2026 |
| Corporate Affairs UK Limited | Wholesale & retail | 2025 |
| Corporate Catering Events Limited | Hospitality | 2021 |
| Corporate Fleet Care Finance Limited | Administrative & support | 2003 |
| Corporate Golf Activities Ltd | Arts & recreation | 2025 |
| Corporate Mansion Ltd | Other services | 2019 |
| Corporate Merchandising Company Limited | Wholesale & retail | 2024 |
| Corporate Privileges Limited | Other services | 2006 |
| Corporate Real Estate Finance Ltd | Real estate | 2020 |
| Corporate Strategies PLC | Extraterritorial | 1990 |
| Corporate Telecommunications Limited | Extraterritorial | 1995 |
| Corporatec (London) Limited | Extraterritorial | 2007 |
| Corporateg Ltd | Wholesale & retail | 2025 |
| Corporaterealm Limited | Wholesale & retail | 1997 |
| Corporation POP Ltd | Information & communication | 2003 |
| Corporation Street Ltd | Arts & recreation | 2020 |
| Corpvance Limited | Information & communication | 2026 |
| Corradiller Quay Cottage Ltd | Real estate | 2023 |