| CRS Staffing Paye Limited | Wholesale & retail | 2025 |
| CRT Fire Protection Limited | Construction | 2012 |
| Crumble Crush Ltd | Hospitality | 2023 |
| Crunch Candy Limited | Wholesale & retail | 2025 |
| Crushd Golf Ltd | Arts & recreation | 2016 |
| Crystal Clean 2 (North West) Limited | Wholesale & retail | 2016 |
| Crystal Clear Management Services Limited | Professional & scientific | 2019 |
| Crystalsite Cleaning & Finishing Ltd | Construction | 2026 |
| CS Financial Management Limited | Financial services | 2012 |
| CS Maintenance Lancashire Ltd | Households | 2022 |
| CS Properties (Blackpool) Ltd | Real estate | 2021 |
| CSE Cooling Services Ltd | Professional & scientific | 2020 |
| CSL Management Limited | Administrative & support | 2015 |
| Csplastering Limited | Construction | 2015 |
| CSS Group Properties Ltd | Real estate | 2025 |
| CT Houses Limited | Real estate | 2026 |
| CTC Solutions Ltd | Health & social care | 2012 |
| Ctperformancecoaching Ltd | Arts & recreation | 2025 |
| CTS Valeting & Detailing Ltd | Administrative & support | 2021 |
| Ctti Ltd | Health & social care | 2015 |
| CTY Urmston Limited | Extraterritorial | 2015 |
| CU Business Consultancy Ltd | Information & communication | 2016 |
| Cuban Bar Limited | Hospitality | 2021 |
| Cube Hotels Blackpool Ltd | Hospitality | 2022 |
| Cube Hotels Limited | Hospitality | 2021 |
| Cubescape Ltd | Information & communication | 2009 |
| Cubetec Ltd | Information & communication | 2015 |
| Cubi 1 Company Limited | Wholesale & retail | 2023 |
| Cubic Evolution Limited | Information & communication | 2004 |
| Cubik Consulting Ltd | Professional & scientific | 2016 |
| Cuddy Concepts Ltd | Wholesale & retail | 2025 |
| Cuhadar Yachting Ltd | Extraterritorial | 2024 |
| Culverhouse Associates Limited | Information & communication | 2003 |
| Cumbria Mailing Services Limited | Other services | 1995 |
| Cumpsty Properties Ltd | Construction | 2016 |
| Cuneyt Yachting Limited | Extraterritorial | 2024 |
| Cunliffe Decor Painting Contractors Ltd | Construction | 2024 |
| CUP Above the Rest Ltd | Hospitality | 2022 |
| Cupao Ltd | Hospitality | 2025 |
| Current Construction Ltd | Construction | 2023 |
| Currie Capital Limited | Administrative & support | 2002 |
| Curry Plaza Limited | Hospitality | 2020 |
| Curtain Craft (NW) Limited | Wholesale & retail | 2008 |
| Curzon Road Garage Limited | Wholesale & retail | 2008 |
| Custodian Financial Management Limited | Financial services | 2017 |
| Custombuilthomes Ltd | Wholesale & retail | 2025 |
| Customer Focused Technology Ltd | Information & communication | 2020 |
| Cutting Edge Logistics Ltd | Wholesale & retail | 2024 |
| CV Electrical Services Ltd | Construction | 2024 |
| CVR Sofa's Limited | Wholesale & retail | 2025 |
| CW Football Development Ltd | Arts & recreation | 2026 |
| Cwrs Academy Ltd | Education | 2024 |
| CXR Petras Limited | Real estate | 2017 |
| CY & SF Properties Limited | Real estate | 2021 |
| CY Properties NW Limited | Real estate | 2026 |
| Cyber Jedi Limited | Information & communication | 2016 |
| Cybersonix Ltd | Wholesale & retail | 2019 |
| Cygnet Furniture Limited | Wholesale & retail | 2009 |
| Cygnusb Ltd | Professional & scientific | 2019 |
| Cypress Group Limited | Administrative & support | 2024 |
| Cypress Homes Limited | Real estate | 2025 |
| Cyprus Barbers 1 Ltd | Other services | 2024 |
| Cyprus Construction Decorium Ltd | Construction | 2024 |
| Cyprus Halls Ltd | Wholesale & retail | 2025 |
| Cyprus Takeaway Ltd | Hospitality | 2023 |
| D & a Properties (NW) Ltd | Real estate | 2019 |
| D & C Engineering Limited | Manufacturing | 2021 |
| D & D (North West) Leisure Ltd | Hospitality | 2024 |
| D & D Homes North West Ltd | Construction | 2025 |
| D & F Trading Solutions Limited | Construction | 2025 |
| D & G Fitness World Ltd | Arts & recreation | 2020 |
| D & T Rubbish & Rubble Limited | Water & waste | 2023 |
| D and L I Ltd | Financial services | 2025 |
| D and T Burns Properties LLP | | 2019 |
| D B Agencies Limited | Wholesale & retail | 2005 |
| D C R Security Ltd | Construction | 2024 |
| D C T Properties Limited | Administrative & support | 2018 |
| D Edge Process Operations Limited | Administrative & support | 2018 |
| D Elliott TM Ltd | Transport & logistics | 2024 |
| D Jack UK Engineering Limited | Professional & scientific | 2011 |
| D Jeffrey Consultancy Limited | Information & communication | 2010 |
| D Jones BED Centre Ltd | Wholesale & retail | 2018 |
| D K Web Design Limited | Information & communication | 2010 |
| D Lamplough Offshore Limited | Professional & scientific | 2019 |
| D P Electrical (NW) Limited | Energy | 2018 |
| D P Parking Consultancy Ltd | Other services | 2023 |
| D W Bateman Limited | Information & communication | 2008 |
| D&A Support Limited | Health & social care | 2018 |
| D&Bconsult Ltd | Construction | 2020 |
| D&D Sunar Limited | Wholesale & retail | 2020 |
| D&K Meats of Carleton Limited | Wholesale & retail | 2021 |
| D. Black Limited | Professional & scientific | 2026 |
| D. H. GAS Limited | Construction | 2005 |
| D. L. D. Lighting Limited | Wholesale & retail | 1995 |
| D.A.G Indirect Procurement Solutions Ltd | Information & communication | 2019 |
| D.Foshan Limited | Wholesale & retail | 2017 |
| D.H.Services (Electrical N.W.) Ltd | Construction | 2025 |
| D.J.H Enforcement Ltd | Administrative & support | 2022 |
| D.L.D. Designed Lighting & Distribution Limited | Extraterritorial | 2016 |
| D.S.Deliveries Ltd | Transport & logistics | 2026 |