| Composite Panels NW Ltd | Construction | 2022 |
| Compuparts Ltd | Households | 2026 |
| Compurent Limited | Manufacturing | 1995 |
| Computer Support Centre Ltd | Information & communication | 2021 |
| Concept 4 Creative Limited | Professional & scientific | 2004 |
| Concept Holdings (NW) Limited | Financial services | 2018 |
| Concept Law Solicitors Limited | Professional & scientific | 2010 |
| Concept Plastics Limited | Manufacturing | 1997 |
| Concord Recruitment Ltd | Administrative & support | 2025 |
| Concrete Solutions Accrington Limited | Construction | 2009 |
| Connect Family Contact Centre Ltd | Health & social care | 2025 |
| Connecting Space Studio Ltd | Professional & scientific | 2021 |
| Connectjets Limited | Administrative & support | 2009 |
| Conservation Services N.W. Limited | Other services | 2002 |
| Continental Contracting (CCL) Limited | Administrative & support | 2016 |
| Cookies (Blackpool) Limited | Hospitality | 2017 |
| Cool Motors Ltd | Wholesale & retail | 2024 |
| Core Estates Lettings & Sales Limited | Real estate | 2026 |
| Cortek Distribution Ltd. | Manufacturing | 1999 |
| Cosmin Building Limited | Construction | 2022 |
| Countplus Ltd | Professional & scientific | 2019 |
| Couture Concepts Interiors Ltd | Professional & scientific | 2023 |
| CR Wheeler Limited | Construction | 2014 |
| Cranford Estates (Projects) Limited | Construction | 2013 |
| Cranford Estates (Strategic Investments) Limited | Construction | 2014 |
| Crash Ltd | Administrative & support | 2025 |
| Crawford Brickwork Limited | Construction | 2025 |
| Creative Accounting Solutions Limited | Professional & scientific | 2024 |
| Crescent Nelson Ltd | Health & social care | 2023 |
| Cropgen Limited | Agriculture & fishing | 2013 |
| Cross (Salterforth) Ltd | Construction | 2016 |
| Cross Performance Management Limited | Professional & scientific | 2014 |
| Cross Renovations Ltd | Construction | 2016 |
| Crosstrade Engineering Services Limited | Manufacturing | 2018 |
| Crosstrade Logistics Limited | Transport & logistics | 2015 |
| Crown & Kingdom Interiors Ltd | Wholesale & retail | 2025 |
| Crown Coaches Ltd | Transport & logistics | 2026 |
| Crunchy Chicken KZ Limited | Hospitality | 2019 |
| Crust N Slice Limited | Hospitality | 2023 |
| Cryocool Limited | Construction | 2023 |
| Crystal Clear UK Services Ltd | Administrative & support | 2023 |
| CS Property & Maintenance Services Ltd | Construction | 2020 |
| Csef Limited | Information & communication | 2010 |
| CSS Care Ltd | Public administration | 2020 |
| CSS Care Properties Ltd | Real estate | 2025 |
| Cuanto Company Ltd | Wholesale & retail | 2026 |
| Cubanas Bar Ltd | Hospitality | 2021 |
| Cubus LUX PLC | Construction | 2004 |
| Cuddlr Limited | Wholesale & retail | 2023 |
| Cumbria Building Preservation Trust Limited | Arts & recreation | 1977 |
| Curfew Club Ltd | Wholesale & retail | 2026 |
| CURRIES2U Ltd | Hospitality | 2024 |
| Curry Munchers Ltd | Hospitality | 2023 |
| Cushy Properties Limited | Real estate | 2024 |
| Cutee Clothing Ltd | Wholesale & retail | 2023 |
| Cvrd Solutions Ltd | Wholesale & retail | 2025 |
| Cöre Hause Ltd | Arts & recreation | 2025 |
| D I Surveying Limited | Information & communication | 2004 |
| D Miller Property Investments Limited | Real estate | 2024 |
| D O I Construction Limited | Construction | 2018 |
| D&Snb Holdings Ltd | Real estate | 2025 |
| D.H.E Construction Ltd | Construction | 2025 |
| D2I Global Limited | Information & communication | 2018 |
| DA Vinci Nelson Ltd | Hospitality | 2025 |
| Daffodils Care Services Ltd | Health & social care | 2025 |
| Dailyessence Ltd | Wholesale & retail | 2024 |
| Daisy Chain Landscaping Ltd | Administrative & support | 2024 |
| Dale Techniche Limited | Manufacturing | 2003 |
| Dalesway Contract Packers Ltd | Administrative & support | 2007 |
| Dalesway Packaging Limited | Administrative & support | 2021 |
| DAN Hooper Enterprises Limited | Arts & recreation | 2015 |
| Daniel Barton Ltd | Construction | 2017 |
| Daniel Crest Limited | Wholesale & retail | 2017 |
| Daniel JON Ltd | Real estate | 2011 |
| Darren Harbour Infrastructure Services Ltd | Information & communication | 2018 |
| Darren Hardy Site Management Limited | Information & communication | 2015 |
| Dartmouth Park Property Limited | Real estate | 2019 |
| Data Driving Services Limited | Transport & logistics | 2024 |
| Dave Burnett Vehicle Solutions Limited | Administrative & support | 2007 |
| David West & Associates Ltd | Professional & scientific | 2003 |
| Dawson Associates Limited | Real estate | 2008 |
| Dawson Portfolio Limited | Real estate | 2022 |
| Daytoday Traders UK Ltd | Wholesale & retail | 2024 |
| DBL (Rescue) Limited | Construction | 2020 |
| DCL Lancashire Limited | Real estate | 2015 |
| Deal My Passion Ltd | Wholesale & retail | 2024 |
| Deals Wheels Ltd | Wholesale & retail | 2023 |
| Dean Brow Limited | Real estate | 2024 |
| Debadged Limited | Manufacturing | 2017 |
| Deedah PSM Ltd | Professional & scientific | 2023 |
| Deen Property Services Ltd. | Real estate | 2017 |
| Deep Dream Ltd | Wholesale & retail | 2019 |
| Defence Traders Limited | Wholesale & retail | 2024 |
| Dehler Productions Ltd | Information & communication | 2019 |
| Delta Bearing Services Ltd | Professional & scientific | 2010 |
| Delta Doorstep Deliveries Limited | Information & communication | 2021 |
| Delta Drives & Controls Ltd | Professional & scientific | 2021 |
| Delta Electrical Repairs Limited | Manufacturing | 1983 |
| Delta Taxis Ltd | Transport & logistics | 2018 |
| Deluxe Foods Ltd | Hospitality | 2020 |