| Cowburn Land & Property Limited | Administrative & support | 2020 |
| CP Curafill Ltd | Manufacturing | 2025 |
| CPH Investments Limited | Real estate | 2022 |
| CR - the Music Café UK Ltd | Hospitality | 2021 |
| CR Callan Holdings Limited | Financial services | 2026 |
| Crack FOG Ltd | Wholesale & retail | 2025 |
| Crafted Interiors NW Ltd | Construction | 2025 |
| Craggs Storage Limited | Transport & logistics | 2018 |
| Cransfield Rail Services Limited | Administrative & support | 2014 |
| Craven Concrete Limited | Manufacturing | 2012 |
| Crazy COW Management Company Limited | Households | 2011 |
| Creative Blogs Limited | Information & communication | 2013 |
| Creative Theory Limited | Administrative & support | 2010 |
| Crmize Ltd | Information & communication | 2023 |
| Crnl Aviation Limited | Transport & logistics | 2015 |
| Croft Health Ltd | Health & social care | 2016 |
| Croft Property Group Limited | Real estate | 2022 |
| Croftparish Ltd | Real estate | 1999 |
| Crookhey Garden Holdings Limited | Administrative & support | 2009 |
| Cross Bay Marketing Ltd | Professional & scientific | 2016 |
| Crown & Maple Property Ltd | Real estate | 2026 |
| Crux Construction Ltd | Construction | 2024 |
| CRW Plumbing and GAS Services Ltd | Construction | 2012 |
| Cryptic Learning Ltd | Information & communication | 2026 |
| Crystal C.C.T.V Limited | Administrative & support | 2003 |
| CSS Training and Consultancy Limited | Education | 2023 |
| Ctchealthcare Ltd. | Health & social care | 1999 |
| Cteck Limited | Information & communication | 2001 |
| Cuckoo Brow Limited | Hospitality | 2010 |
| Culligan Parks Limited | Hospitality | 2019 |
| Cumbria and Lancashire Medical Screening Limited | Real estate | 2007 |
| Cuneiform Ltd | Information & communication | 2016 |
| Cure Investments Ltd | Financial services | 2022 |
| Cure Management Ltd | Professional & scientific | 2022 |
| Curfew Incubators Ltd | Extraterritorial | 2017 |
| Curio & Quirk Ltd | Wholesale & retail | 2025 |
| Curlew Consulting Ltd | Information & communication | 2004 |
| Current Conductors Ltd | Manufacturing | 2021 |
| Custom Mobility @ Home Ltd | Wholesale & retail | 2021 |
| CW Logistics Services Ltd | Professional & scientific | 2009 |
| Cw&R Limited | Professional & scientific | 2005 |
| CWS Consulting Services Ltd | Other services | 2022 |
| CXM Law Limited | Professional & scientific | 2023 |
| Cyborg Films Limited | Information & communication | 2023 |
| Cylante Ltd | Information & communication | 2025 |
| Cytronics Ltd | Manufacturing | 2025 |
| D & E Caravans Limited | Hospitality | 2021 |
| D & F Caravan Parks Limited | Hospitality | 2017 |
| D & M Crawford Properties Limited | Real estate | 2016 |
| D & R Holdings (2018) Limited | Professional & scientific | 2018 |
| D & S Brown Ltd | Wholesale & retail | 2012 |
| D & S Knowles Consulting Ltd | Administrative & support | 2019 |
| D and a Machinery Sales Ltd | Wholesale & retail | 2016 |
| D F Studio (Hair & Beauty) Limited | Other services | 2010 |
| D J Marwood Limited | Wholesale & retail | 2010 |
| D J Stephenson Builders Limited | Construction | 2005 |
| D Mcgowan Home Improvements Ltd | Construction | 2022 |
| D Preston Civils Ltd | Construction | 2019 |
| D R Shepherd Plumbing & Heating Ltd | Construction | 2021 |
| D Salisbury Plastering Ltd | Construction | 2025 |
| D Sparks Brickwork Ltd | Construction | 2019 |
| D&C Property Services Experts Ltd | Construction | 2024 |
| D&D Kendal Limited | Real estate | 2021 |
| D&T Property Management Limited | Real estate | 2018 |
| D-Evolution Ltd | Professional & scientific | 2026 |
| D. a. France Motor Services Limited | Wholesale & retail | 2002 |
| D.M. Instrumentation Ltd | Other services | 2012 |
| D2E Academy Limited | Arts & recreation | 2026 |
| D2R Survey Ltd | Construction | 2005 |
| D8 FST Ltd | Administrative & support | 2010 |
| Dale Street Estates Limited | Real estate | 2022 |
| Dales Building Ltd | Construction | 2022 |
| Dalesflex Ltd | Administrative & support | 2010 |
| Daleside Welding Ltd | Manufacturing | 2014 |
| Dalesmade Limited | Manufacturing | 1998 |
| Dalesview Ltd | Wholesale & retail | 2010 |
| Dallas Enterprise Ltd | Transport & logistics | 2026 |
| Dallas Road Kids Club | Health & social care | 2010 |
| Dalton Suites Limited | Wholesale & retail | 2013 |
| DAM Developments Limited | Construction | 2022 |
| Damian G. Delivery Ltd | Transport & logistics | 2024 |
| Dammzons Limited | Wholesale & retail | 2020 |
| Damside Street Limited | Hospitality | 2024 |
| DAN Hurtley Ltd | Wholesale & retail | 2023 |
| Dana Turkish Style Ltd | Other services | 2019 |
| Dance & Beyond Ltd | Education | 2017 |
| Dance & Dementia C.I.C. | Health & social care | 2014 |
| Dance Business LAB Limited | Professional & scientific | 2020 |
| Dance Business Solutions Limited | Administrative & support | 2025 |
| Dance Network Limited | Education | 2023 |
| Dance Phaze Limited | Arts & recreation | 2025 |
| Danceforce Performing Arts Academy Ltd | Arts & recreation | 2020 |
| Dane Neill Design Ltd | Professional & scientific | 2026 |
| Daniel Merrigan Construction Ltd | Construction | 2020 |
| Dans Deliverys 96 Limited | Transport & logistics | 2025 |
| Dashi Burger Ltd | Hospitality | 2023 |
| Data S.E.A Limited | Professional & scientific | 2023 |
| Databliz Ltd | Information & communication | 2024 |
| Daub Hall Ltd | Health & social care | 2019 |
| Dave Ainsworth Ltd | Agriculture & fishing | 2008 |