| Cooper & Stollbrand Limited | Manufacturing | 1999 |
| Cooper Childcare Limited | Health & social care | 2024 |
| Cooper-Wills Employment Law Limited | Professional & scientific | 2024 |
| Copia Partners Limited | Administrative & support | 2017 |
| Copper Street SPV Limited | Real estate | 2024 |
| Copper Street SPV Opco Limited | Real estate | 2026 |
| Copy for Care Ltd | Real estate | 2017 |
| Copy That Ltd | Information & communication | 2018 |
| COR Serrvices Limited | Wholesale & retail | 2025 |
| Core Electrical Consultancy Ltd | Professional & scientific | 2024 |
| Core Electrical Design Ltd | Professional & scientific | 2024 |
| Core Motors Limited | Wholesale & retail | 2024 |
| Core Post Limited | Information & communication | 2013 |
| Core Telecommunications Limited | Information & communication | 1996 |
| Corecraft Construction Ltd | Construction | 2024 |
| Corefluence Limited | Professional & scientific | 2025 |
| Corelink Stays Ltd | Hospitality | 2025 |
| Corestia Limited | Wholesale & retail | 2022 |
| Coreswitch Ltd | Wholesale & retail | 2025 |
| Cornbrook Ventures Ltd | Professional & scientific | 2022 |
| Cornbury Developments Ltd | Extraterritorial | 2014 |
| Cornerstone Children’S Homes Limited | Health & social care | 2008 |
| Cornerstone Construction (Manchester) Ltd | Real estate | 2021 |
| Cornerstone Properties (Bethesda) Ltd | Real estate | 2021 |
| Cornerstone Properties (Llandudno) Limited | Real estate | 2021 |
| Cornerstone Properties (Manchester) Ltd | Real estate | 2001 |
| Cornheath LLP | | 2016 |
| Cornwall Hull Estates Limited | Other services | 2026 |
| Cornwall Hull Holdings Limited | Other services | 2026 |
| Cornwallis Change Limited | Administrative & support | 2023 |
| Cornwallis ELT Limited | Administrative & support | 2001 |
| Cornwallis Holdings Limited | Professional & scientific | 2017 |
| Corporate Lawyers Ltd | Professional & scientific | 2023 |
| Corridor Property Ltd | Real estate | 2023 |
| Corsica Street Ltd | Financial services | 2021 |
| COS Consulting Limited | Professional & scientific | 2023 |
| Cosgrove Joinery Ltd | Construction | 2011 |
| Cosmetic Couture College Limited | Education | 2025 |
| Cosmetic Couture Group Limited | Education | 2024 |
| Cosmetic Couture Medical Limited | Health & social care | 2024 |
| Cosmic Lens Limited | Wholesale & retail | 2020 |
| Cosmora Holdings Ltd | Professional & scientific | 2025 |
| Cosmos PAK Limited | Wholesale & retail | 2022 |
| Costa Law Limited | Professional & scientific | 2023 |
| Costa Pizza Ltd | Hospitality | 2024 |
| Cosy Care Childcare Ltd | Health & social care | 2024 |
| Cosykidscompany Ltd | Wholesale & retail | 2025 |
| Cottam Preston SPV Limited | Real estate | 2025 |
| Cottons Commercial Property Limited | Real estate | 2016 |
| Cottons Consultancy Ltd | Professional & scientific | 2018 |
| Cottons Financial Planning Limited | Financial services | 2014 |
| Coulton Limited | Extraterritorial | 1996 |
| Country Music Entertainment Limited | Information & communication | 2013 |
| Country Wide Access Installations Limited | Construction | 2019 |
| Coupleofkeys Limited | Wholesale & retail | 2025 |
| Course 4 U Limited | Professional & scientific | 2012 |
| Coussons Property Ltd | Real estate | 2025 |
| COV World Services Ltd | Transport & logistics | 2025 |
| Covaapps Ltd | Information & communication | 2025 |
| Cover and Dine Ltd | Wholesale & retail | 2024 |
| COW Green Halifax SPV Limited | Real estate | 2022 |
| COW Lane Nominees Ltd | Professional & scientific | 2005 |
| Cowburn Watson-Box Limited | Professional & scientific | 2022 |
| Cowcowcow Ltd | Hospitality | 2024 |
| COX Healthcare Consulting Limited | Professional & scientific | 2025 |
| Cozy Care Salford Ltd | Health & social care | 2026 |
| Cozybrvnd Ltd | Wholesale & retail | 2024 |
| CP Tech International Ltd | Wholesale & retail | 2020 |
| CPW Network Services Limited | Information & communication | 2005 |
| CQ (NW) Limited | Other services | 2023 |
| CR & JC Cruz Consulting Limited | Professional & scientific | 2016 |
| Crabbish Limited | Hospitality | 2024 |
| Crabbish Manchester Ltd | Hospitality | 2025 |
| Craft & Vision Ltd | Professional & scientific | 2024 |
| Craft Foundry Limited | Wholesale & retail | 2025 |
| Craftbox Salford Ltd | Wholesale & retail | 2014 |
| Craigs Couriers NW Limited | Transport & logistics | 2015 |
| Cramco Properties Ltd | Real estate | 2023 |
| Cranrust VFX Ltd | Information & communication | 2009 |
| Cranwell Gardens Limited | Real estate | 1991 |
| Cratus Business Services UK Ltd | Professional & scientific | 2020 |
| Craven North Ltd | Real estate | 2023 |
| Crawford Site Solutions Ltd | Administrative & support | 2026 |
| Crawfords Accountants LLP | | 2010 |
| Crazy Clearance Manchester Ltd | Wholesale & retail | 2025 |
| Crazy Lemon Ltd | Wholesale & retail | 2024 |
| CRC Project Management Services Ltd | Administrative & support | 2017 |
| Cream AV Limited | Construction | 2016 |
| Creative England Limited | Arts & recreation | 2010 |
| Creative Growth Finance Limited | Financial services | 2019 |
| Creative Growth Solutions Limited | Professional & scientific | 2025 |
| Creative Ideation Hub Ltd | Information & communication | 2023 |
| Creative Industries Federation | Other services | 2013 |
| Creative UK Holdings Limited | Arts & recreation | 2019 |
| Creative UK Investments Limited | Administrative & support | 2014 |
| Creatives Agency Ltd | Other services | 2014 |
| Creature Team Ltd | Arts & recreation | 2025 |
| Creo Acquisitions Ltd | Professional & scientific | 2023 |
| Crescent Events Group Limited | Wholesale & retail | 2025 |
| Crescent Purchasing Limited | Other services | 2008 |