| County Hotel (Carnforth) Limited | Hospitality | 2007 |
| Covered in Style Limited | Manufacturing | 2016 |
| CPS Estates Ltd | Real estate | 2023 |
| CPS Land Estates Ltd | Real estate | 2026 |
| Crabtree Clay Shoot Limited | Arts & recreation | 2016 |
| Crafty Cat Coffee Ltd | Manufacturing | 2024 |
| Craggs View Management Company Limited | Households | 2022 |
| Craven Heifer Ingleton Ltd | Hospitality | 2019 |
| Crazy Golf @ Greenlands Ltd | Arts & recreation | 2020 |
| CRC Contracts Ltd | Construction | 2022 |
| Creative Blue Acorn Ltd | Wholesale & retail | 2022 |
| Creative Blue Holdings Ltd | Financial services | 2022 |
| Creative Lakes Limited | Information & communication | 2013 |
| Crombie (Holdings) Ltd | Wholesale & retail | 2020 |
| Cross-Curricular Orienteering Ltd | Wholesale & retail | 2017 |
| Crowe Construction Limited | Construction | 2003 |
| Ctrl ALT Elite Limited | Information & communication | 2024 |
| Cumberland and Westmorland Schools Limited | Extraterritorial | 2006 |
| Cumbria Cellar Service Limited | Professional & scientific | 2016 |
| Cumbria HD Ltd | Professional & scientific | 2024 |
| Cumbrian Kayaking Ltd | Arts & recreation | 2017 |
| Cumbrian Shepherd Huts Limited | Manufacturing | 2014 |
| CW Service and Repairs Ltd | Administrative & support | 2017 |
| Cyberlens Information and Cyber Security Limited | Information & communication | 2020 |
| Cycle AID (Solicitors) Limited | Professional & scientific | 2012 |
| Cycle AID Assist Limited | Wholesale & retail | 1998 |
| Cycle AID Limited | Professional & scientific | 1989 |
| Cygnus Coaching & Development Limited | Education | 2019 |
| CZJ Hurley Limited | Construction | 2015 |
| D & W Bricklayers Limited | Construction | 2018 |
| D a C (Kendal) Limited | Wholesale & retail | 2005 |
| D H Mole Limited | Manufacturing | 2003 |
| D P Carter Limited | Transport & logistics | 2012 |
| D. H. Jackson Limited | Wholesale & retail | 2003 |
| D.A.T.E.C. Consultants Limited | Professional & scientific | 1990 |
| D.E.T. Developments Limited | Construction | 2019 |
| Daffodil Homes (Lancashire) Limited | Construction | 2006 |
| Dales Cottages Ltd | Real estate | 2024 |
| Dales Finance Limited | Professional & scientific | 2018 |
| Dales Traditional Butchers Limited | Wholesale & retail | 2006 |
| DAN Green Building Services Limited | Construction | 2017 |
| DAN Maguire Hoof Trimming Limited | Agriculture & fishing | 2024 |
| DAN Willan Coaches Ltd | Transport & logistics | 2014 |
| DAN Wilson Plumbing Ltd | Construction | 2025 |
| Daniel Spencer Electrical Contractor Limited | Construction | 2015 |
| Danskin Saddle Fitting Ltd | Wholesale & retail | 2025 |
| DAO Racing UK Limited | Arts & recreation | 2026 |
| Darren RAY Consulting Ltd | Administrative & support | 2024 |
| Darwell Enterprises Ltd | Other services | 2025 |
| Dave Edmondson Landscapes Ltd | Administrative & support | 2001 |
| Dave the Armourer Limited | Information & communication | 2005 |
| Dave Wilson Contracting Limited | Construction | 2023 |
| David Alexander Marketing Limited | Information & communication | 2013 |
| David Lloyd Properties Ltd | Real estate | 2024 |
| David R Proctor Consultancy Ltd | Professional & scientific | 2022 |
| David Salisbury Ltd | Real estate | 2015 |
| David Search Limited | Administrative & support | 1967 |
| David Thexton Mountain Guide Ltd | Arts & recreation | 2025 |
| Davis & Bowring Limited | Professional & scientific | 2013 |
| DB Fire Doors Limited | Manufacturing | 2024 |
| DB Inspection and Building Services Limited | Professional & scientific | 2011 |
| DD Asset Management Limited | Real estate | 2017 |
| DEC Containment UK Limited | Wholesale & retail | 2006 |
| Delta Safety Ltd | Professional & scientific | 2021 |
| Dennis Barnfield Holdings Limited | Financial services | 2023 |
| Dennison Plant Solutions Ltd | Administrative & support | 2011 |
| Dents Blanches Limited | Health & social care | 2009 |
| DGF Asset Management Ltd | Real estate | 2018 |
| Dignity in Dementia C.I.C. | Health & social care | 2014 |
| Distilled Design Limited | Professional & scientific | 2020 |
| Distinct Energy Solutions Limited | Professional & scientific | 2016 |
| District Construction & Landscaping Ltd | Construction | 2025 |
| DLC Precision Limited | Professional & scientific | 2010 |
| DLK123 Ltd | Hospitality | 2023 |
| DMN Plumbing Ltd | Construction | 2019 |
| Dobson and Sons Construction Limited | Construction | 2024 |
| Docker Park Farm Kirkby Lonsdale Ltd | Hospitality | 2019 |
| Docker Park Farm Limited | Agriculture & fishing | 2010 |
| Dolomiti Property Ltd | Real estate | 2017 |
| Dolomiti Residential Ltd | Real estate | 2020 |
| Door 34 Ltd | Hospitality | 2023 |
| Dorothy Wightman Interior Design Limited | Other services | 2016 |
| Downhams (Cowan Bridge) Limited | Construction | 2015 |
| Drew Ford Garden Machinery Ltd | Manufacturing | 2022 |
| Drive to Arrive Ltd | Extraterritorial | 2007 |
| DRJ Flooring Ltd | Construction | 2016 |
| Drybeck Ltd | Construction | 2008 |
| Dsrw Consulting Limited | Professional & scientific | 2025 |
| Dunright Limited | Manufacturing | 2006 |
| DWF1 Limited | Professional & scientific | 2014 |
| DWR Bronaber CYF | Water & waste | 2009 |
| E-Graphics Ltd | Professional & scientific | 2018 |
| Eagle House (Mitcham) Limited | Education | 2007 |
| Eagle House Group Limited | Education | 2007 |
| Earthbeencoffee Limited | Hospitality | 2025 |
| East Coast Leisure Limited | Arts & recreation | 2002 |
| Eclipse Staffing Ltd | Administrative & support | 2022 |
| Eco-Shield Environmental Services LLP | | 2013 |
| Eden Alfresco Limited | Wholesale & retail | 2026 |
| Edward Hart Financial Services Limited | Professional & scientific | 2015 |