| Construction Media Publishing Limited | Information & communication | 2013 |
| Construction Reclaims Ltd | Professional & scientific | 2014 |
| Construction Services NW Limited | Construction | 2010 |
| Construction Services Solutions Ltd | Construction | 2026 |
| Construction Site Solutions Ltd | Construction | 2025 |
| Constructions, Design Interiors & Building Houses Ltd | Construction | 2025 |
| Constructive Consultancy (Northwest) Ltd | Professional & scientific | 2023 |
| Constructive Partnerships Ltd | Professional & scientific | 2013 |
| Constructive Thinking Ltd | Other services | 2012 |
| Constructive Thinking Studio Limited | Professional & scientific | 2003 |
| Constructx (NW) Ltd | Construction | 2025 |
| Consulenza Group Ltd | Professional & scientific | 2021 |
| Consult Events Ltd | Professional & scientific | 2021 |
| Consultancies 1 Ltd | Information & communication | 2024 |
| Consultancy & Management Services Ltd | Professional & scientific | 2018 |
| Consultant Contract Management Limited | Professional & scientific | 2017 |
| Consultation Claims Ltd | Administrative & support | 2012 |
| Consulvance Ltd | Professional & scientific | 2025 |
| Consumer Credit Ltd | Construction | 2024 |
| Consumer Sales Solutions Ltd | Other services | 2025 |
| Consumer Savings Group Ltd | Financial services | 2025 |
| Consura Ltd | Wholesale & retail | 2025 |
| Contact Left Limited | Wholesale & retail | 2006 |
| Contact Sport Limited | Administrative & support | 2020 |
| Contadina Limited | Extraterritorial | 2012 |
| Contafoe Ltd | Administrative & support | 2012 |
| Container and Cabin Services Limited | Manufacturing | 2014 |
| Container Cabins Direct Ltd | Wholesale & retail | 2026 |
| Container Movements Limited | Transport & logistics | 1991 |
| Containers Direct Ltd | Wholesale & retail | 2008 |
| Containers Northwest Ltd | Other services | 2016 |
| Contek Building Solutions Ltd | Construction | 2025 |
| Content by Abbi Ltd | Professional & scientific | 2025 |
| Content Care Services Ltd | Health & social care | 2023 |
| Content Energy Ltd | Construction | 2020 |
| Content Installations Limited | Construction | 2023 |
| Content Liverpool Ltd | Wholesale & retail | 2018 |
| Content Properties Ltd | Real estate | 2024 |
| Content Renewables Limited | Construction | 2021 |
| Content Residential Ltd | Health & social care | 2025 |
| Context UX Ltd | Professional & scientific | 2025 |
| Contigo Ltd | Professional & scientific | 2021 |
| Continental Eyewear Limited | Extraterritorial | 1984 |
| Continuous Care 24 7 Ltd | Health & social care | 2024 |
| Continuous Dataprint (U.K.) Limited | Wholesale & retail | 1992 |
| Continuum Communities Community Interest Company | Health & social care | 2024 |
| Continuum North West Limited | Construction | 2012 |
| Continuum Project Solutions Ltd | Information & communication | 2021 |
| Continuum Support - Care Services Ltd | Health & social care | 2013 |
| Contract Controls Ltd | Professional & scientific | 2025 |
| Contract Joinery Upholstery Ltd | Manufacturing | 2021 |
| Contract Management Consultants Ltd | Professional & scientific | 2024 |
| Contractordotcom Limited | Professional & scientific | 2021 |
| Contractors Support Limited | Professional & scientific | 2016 |
| Contratti Ltd | Other services | 2018 |
| Control Instrument Solutions Ltd | Wholesale & retail | 2025 |
| Convent Court Residential Ltd | Real estate | 2023 |
| Converra Ltd | Wholesale & retail | 2025 |
| Conversion Alchemy Ltd | Professional & scientific | 2023 |
| Conversion Marketing Group Ltd | Professional & scientific | 2022 |
| Converter Limited | Water & waste | 2020 |
| Convertex Energy Limited | Professional & scientific | 2025 |
| Convex Performance Limited | Professional & scientific | 2023 |
| Conveyancer Near ME Limited | Information & communication | 2021 |
| Conveyreadypacks Limited | Professional & scientific | 2026 |
| Convrts Ltd | Arts & recreation | 2017 |
| Conway Birkenhead Ltd | Hospitality | 2026 |
| Conway Coffee Ltd | Hospitality | 2026 |
| Conway Plastering Services Limited | Construction | 2026 |
| Conxtructors Limited | Construction | 2023 |
| Coogee (Liverpool) Limited | Real estate | 2006 |
| Cookcanal Ltd | Hospitality | 2025 |
| Cooke Capital Limited | Professional & scientific | 2021 |
| Cookie Bro’S Ltd | Wholesale & retail | 2025 |
| Cooking GOD Limited | Real estate | 2005 |
| Cooking With LIZ C.I.C. | Education | 2025 |
| Cooksons Bridge Limited | Hospitality | 2019 |
| Cooksons NW Ltd | Hospitality | 2023 |
| Cool Water Company NW Limited | Hospitality | 2022 |
| Coolmedia Marketing Ltd | Professional & scientific | 2024 |
| Coolright Ltd | Professional & scientific | 2016 |
| Cooltrader Limited | Extraterritorial | 2012 |
| Coombe Lodge Ltd | Hospitality | 2026 |
| Cooper (1200) Limited | Professional & scientific | 1966 |
| Cooper (1900) Limited | Professional & scientific | 1929 |
| Cooper Construction Group Ltd | Construction | 2018 |
| Cooper ERP Advisory Limited | Professional & scientific | 2025 |
| Cooper J UK Ltd | Administrative & support | 2011 |
| Cooper Mcclennan Ltd | Real estate | 2020 |
| Cooper ROW Ltd | Real estate | 2021 |
| Coopers Media Limited | Arts & recreation | 2025 |
| Coot Service Ltd | Wholesale & retail | 2015 |
| Copea Holdings Limited | Professional & scientific | 2025 |
| Copea Pharma Limited | Manufacturing | 2013 |
| Copedale Limited | Real estate | 1975 |
| Copelare Limited | Real estate | 1982 |
| Copia Consults Limited | Information & communication | 2018 |
| Coping With Joy Ltd | Education | 2026 |
| Copious Law Limited | Professional & scientific | 2021 |
| Copper BED Head Ltd | Health & social care | 2023 |