| Cuepointbolton Limited | Arts & recreation | 2025 |
| Culand Street Motors Limited | Wholesale & retail | 2010 |
| Culcheth Hall Farm Barns Management Limited | Households | 2004 |
| Culinaryedgeservices Limited | Administrative & support | 2026 |
| Culligan Holdings Limited | Financial services | 2017 |
| Cullinan Green & Feran Ltd | Real estate | 2023 |
| Cullinan Motors Ltd | Wholesale & retail | 2023 |
| Cully Code Limited | Information & communication | 2017 |
| Culmac Motor Factors Limited | Wholesale & retail | 1983 |
| Culr Ltd | Wholesale & retail | 2019 |
| Culshaw Group Holdings Limited | Financial services | 2023 |
| Cultivar Laboratories Ltd | Agriculture & fishing | 2024 |
| Culture Barbers Ltd | Other services | 2021 |
| Cultures That POP Limited | Professional & scientific | 2023 |
| Cumbraven Ltd | Professional & scientific | 2015 |
| Cuni Legal Services Limited | Professional & scientific | 2026 |
| Cunliffe Legal Limited | Professional & scientific | 2025 |
| Cuppa JOE Ltd | Hospitality | 2025 |
| Cuppacoffee NW Limited | Hospitality | 2025 |
| Cura Payroll Hub Ltd | Professional & scientific | 2026 |
| Cura Properties Limited | Real estate | 2018 |
| Curae Solicitors Ltd | Professional & scientific | 2022 |
| Curio Homes Ltd | Real estate | 2023 |
| Curious Bride Ltd | Wholesale & retail | 2017 |
| Curious Little Acorns Ltd | Health & social care | 2024 |
| Curly Whirleez Bolton Limited | Arts & recreation | 2018 |
| Curlys Cafe Limited | Hospitality | 2019 |
| Curmed Alliance Ltd | Health & social care | 2025 |
| Currans Removals Ltd | Transport & logistics | 2022 |
| Currency House Limited | Financial services | 2024 |
| Currentcroft Limited | Administrative & support | 1997 |
| Curry Westhoughton Limited | Hospitality | 2020 |
| Curtains by Doreen Limited | Manufacturing | 2015 |
| Curv'I'Licious Limited | Other services | 2014 |
| Curzon Entertainments Limited | Hospitality | 2005 |
| Curzon House Estates Ltd | Real estate | 2011 |
| Custom Designed Cables Ltd | Manufacturing | 2006 |
| Custom Fit Build Ltd | Other services | 2021 |
| Custom KIT Group Limited | Wholesale & retail | 2025 |
| Custom Parts Ltd | Wholesale & retail | 2024 |
| Custom Table Top Co Ltd | Arts & recreation | 2018 |
| Customs 2 Go Ltd | Transport & logistics | 2021 |
| CUT & Go (Skelmersdale) Ltd | Other services | 2019 |
| CUT and Go (Halifax) Ltd | Other services | 2019 |
| CUT and Go (Liverpool) Ltd | Other services | 2018 |
| CUT and Go (ST Helens) Ltd | Other services | 2019 |
| CUT N Glow Beauty Limited | Other services | 2025 |
| Cutacre Park Developments Ltd | Information & communication | 2016 |
| Cute Households Ltd | Wholesale & retail | 2025 |
| Cute Kitchen Limited | Wholesale & retail | 2012 |
| Cute Kitchenware Ltd | Wholesale & retail | 2022 |
| Cuts Crew Ltd | Other services | 2026 |
| Cutsmart Limited | Construction | 2020 |
| Cutthroatpete Limited | Other services | 2018 |
| Cutting Lounge (Bolton) Ltd | Other services | 2017 |
| Cutting Lounge MCR Ltd | Other services | 2023 |
| CV Optimisation Limited | Information & communication | 2010 |
| CVP Connect Ltd | Professional & scientific | 2018 |
| CVP Consult Ltd | Education | 2016 |
| CVP Education Ltd | Education | 2019 |
| CVP Group Holdings Limited | Financial services | 2020 |
| CW Construction (Holdings) North West Limited | Financial services | 2014 |
| CW Construction (Investments) North West Limited | Real estate | 2014 |
| CW Hair and Beauty Ltd | Financial services | 2022 |
| CWE Habitats Limited | Real estate | 2025 |
| Cwmbran Market Properties Limited | Financial services | 2019 |
| CWS Estates Ltd | Financial services | 2022 |
| CX Liverpool Ltd | Financial services | 2025 |
| Cyan Bay Limited | Administrative & support | 2017 |
| Cyan Sky Solutions Limited | Information & communication | 2018 |
| Cyanic Resources Ltd | Administrative & support | 2017 |
| Cyber Universe Europe Ltd | Information & communication | 2025 |
| Cyber-Corps Ltd | Information & communication | 2024 |
| Cyber-Essentialsplus Ltd | Information & communication | 2025 |
| CYBER121 Ltd | Information & communication | 2025 |
| Cyberazimuth Limited | Information & communication | 2003 |
| Cyberbie Limited | Information & communication | 2020 |
| Cybergps Limited | Information & communication | 2024 |
| Cybrmed UK Ltd | Wholesale & retail | 2022 |
| Cybvisor Limited | Information & communication | 2023 |
| Cycle Surgeon Ltd | Extraterritorial | 2015 |
| CYCLE2HEALTH CIC | Wholesale & retail | 2021 |
| Cyclewell Ltd | Manufacturing | 2021 |
| Cycling Media Ltd | Professional & scientific | 2019 |
| Cycling Tours (Europe) Ltd | Administrative & support | 2020 |
| Cymroz Ltd | Professional & scientific | 2018 |
| Cynergol Ltd | Transport & logistics | 2023 |
| Cyropa Limited | Households | 2021 |
| Cyrus Logistics Ltd | Transport & logistics | 2025 |
| Cysmic Ltd | Information & communication | 2016 |
| Cyvance Limited | Information & communication | 2024 |
| D & D Kitchen Limited | Manufacturing | 2025 |
| D & G Building Solutions Limited | Construction | 2023 |
| D & J Properties North West Limited | Real estate | 2005 |
| D & K Carpentry & Joinery Ltd | Construction | 2025 |
| D & K Haslam Limited | Financial services | 2022 |
| D & L Jewellery Limited | Wholesale & retail | 2012 |
| D & M Construction (NW) Ltd | Construction | 2025 |
| D & M Motors Little Lever Ltd | Wholesale & retail | 2024 |
| D & P Roofing and Building Ltd | Construction | 2017 |