| Clarksons (Petergate) Limited | Wholesale & retail | 2006 |
| Claro Landscapes Ltd | Administrative & support | 2003 |
| Coastal Colour Print Limited | Manufacturing | 2000 |
| Coastline Engineered Solutions Limited | Wholesale & retail | 1988 |
| Coates Marine Limited | Wholesale & retail | 1998 |
| Coldtrans Limited | Transport & logistics | 2005 |
| Commercial Interior Solutions Limited | Construction | 2000 |
| Communicens Limited | Information & communication | 2000 |
| Computer Problems Understood Limited | Information & communication | 2008 |
| Coneysthorpe Trustees Limited | Professional & scientific | 1979 |
| Conversion Company Limited(The) | Information & communication | 1986 |
| Coppice Drive (Harrogate) Management Company Limited | Households | 1977 |
| Corbridge Investments Limited | Real estate | 2001 |
| Corlands Minerals Limited | Mining & quarrying | 1962 |
| Cottenhams Law Cost Drafting & Consultants Limited | Professional & scientific | 2002 |
| Country Hideaways Limited | Real estate | 2005 |
| County Properties (Northern) Limited | Real estate | 1976 |
| County Properties Group Limited | Real estate | 1957 |
| County Properties Limited | Real estate | 1978 |
| CP Investment (UK) Limited | Professional & scientific | 2006 |
| CPR Northern Limited | Real estate | 2007 |
| Crab Lane Veterinary Practice Limited | Professional & scientific | 2004 |
| Crabtree Hall Management Company Limited | Real estate | 2007 |
| Craven & Co. Limited | Manufacturing | 2000 |
| Criterion Controls Limited | Manufacturing | 2006 |
| Croxdale Fast-Fit Limited | Wholesale & retail | 1998 |
| Cymark CRM Ltd | Administrative & support | 2005 |
| D a Horn Limited | Wholesale & retail | 2003 |
| D Hodgetts Decorators Limited | Construction | 2002 |
| D W Marley Limited | Agriculture & fishing | 2006 |
| D&Cw Design Ltd | Professional & scientific | 2014 |
| D.A. Budge Pension Consultancy Limited | Administrative & support | 1987 |
| D.A. Budge Pension Trustees Limited | Professional & scientific | 1997 |
| Daintyhill Care Limited | Education | 1988 |
| Dalby Forest Lodges Limited | Hospitality | 2007 |
| Dales Garden Services Limited | Administrative & support | 2002 |
| Dales of Thirsk Limited | Construction | 2005 |
| Dales Surveying Limited | Information & communication | 2007 |
| Dalewood Trust | Health & social care | 1996 |
| Dalian Properties Limited | Construction | 1997 |
| Damis Ltd | Information & communication | 2006 |
| Dare 2 B Different Limited | Extraterritorial | 2003 |
| Dave Fisher Windows Limited | Construction | 2003 |
| Dave Poole Building and Joinery Limited | Construction | 2003 |
| David Hill (Agricultural Contractor) Limited | Agriculture & fishing | 2003 |
| David Hill (Skipton) Limited | Agriculture & fishing | 2001 |
| David Kent Joinery Limited | Construction | 2005 |
| David Pullan Transport Ltd | Transport & logistics | 2006 |
| DBG (Agriculture) Ltd | Agriculture & fishing | 2010 |
| Deepdale Technical Services Limited | Wholesale & retail | 2002 |
| Dempsey Precision Ltd | Wholesale & retail | 2003 |
| Deps Group Limited | Financial services | 2017 |
| Deps Holdings Limited | Financial services | 2017 |
| Dextra Management Limited | Administrative & support | 2004 |
| Diamond Edge (UK) Limited | Administrative & support | 2003 |
| Diana Atkinson Limited | Financial services | 2003 |
| Digital Electronic Business Systems Limited | | 1987 |
| Digital LAB Consulting Ltd | Information & communication | 2018 |
| Disability Action Yorkshire | Health & social care | 1995 |
| Discryption Limited | Professional & scientific | 2002 |
| Dodsworth Joinery & Builders Limited | Construction | 2007 |
| Donnington Energy Limited | Professional & scientific | 2009 |
| Douglas Blacklock Limited | Construction | 2002 |
| Dowse of Richmond Limited | Transport & logistics | 2003 |
| Dragon Programme Management Limited | Information & communication | 2007 |
| Drax Bess EK Limited | Energy | 2023 |
| Drax Hydro Limited | Administrative & support | 2013 |
| Drax River Hydro Limited | Energy | 2006 |
| Dring Stone Ltd | Wholesale & retail | 2007 |
| Dusrolbake Limited | Real estate | 1963 |
| Dyscova Ltd | Other services | 2015 |
| E M Engineering Services Limited | Construction | 2006 |
| EAD Design Consultants Limited | Professional & scientific | 2007 |
| Eastgate Cottages Limited | Hospitality | 1994 |
| Econ Engineering Group Limited | Financial services | 2022 |
| Econ Engineering Limited | Manufacturing | 1959 |
| Ecosurv Ltd | Administrative & support | 2003 |
| Eglobal Voyage Limited | Administrative & support | 2007 |
| Electrical & Mechanical Projects Ltd | Administrative & support | 2003 |
| Elijah Allen & SON Ltd | Wholesale & retail | 2002 |
| Elim Lodge Limited | Hospitality | 1986 |
| Elite Computer Systems (UK) Ltd | Professional & scientific | 2000 |
| ELM Tree Press Limited | Information & communication | 2004 |
| Epiphany Music Limited | Education | 2005 |
| Escobar (Bay) Limited | Hospitality | 2000 |
| Espa Limited | Administrative & support | 2005 |
| Espm Limited | Manufacturing | 2001 |
| Essential Needs | Other services | 2004 |
| Estate Management 50 Limited | Households | 1998 |
| Euroskill Services Ltd. | Information & communication | 1998 |
| Eurotek Sports Motorcycles Limited | Wholesale & retail | 2005 |
| Express 2 YOU Limited | Extraterritorial | 2005 |
| F a Broadwith & Sons Limited | Agriculture & fishing | 2007 |
| F a Supplies Limited | Manufacturing | 2000 |
| F B Taylor (Cable Contractors) Limited | Construction | 1976 |
| F J Hodsman & Sons Ltd | Agriculture & fishing | 2003 |
| F. Lowley & SON Limited | Other services | 1980 |
| F.G. Normandale (Scarborough) Limited | Agriculture & fishing | 1990 |
| F.T. Construction Group (Holdings) Ltd. | Construction | 1996 |
| F.T. Construction Limited | Construction | 1987 |