| Cages Limited | Administrative & support | 2000 |
| Calderdale Catering Services Ltd | Wholesale & retail | 2025 |
| Cali Creations Limited | Hospitality | 2020 |
| Caring Community Hub Ltd | Professional & scientific | 2019 |
| Carl Morton Refinishing Limited | Wholesale & retail | 2019 |
| CBD Drink Ltd | Manufacturing | 2023 |
| CBR Joinery Services Ltd | Manufacturing | 2026 |
| CBS Builders and Property Maintenance Limited | Administrative & support | 2016 |
| CCS Catering Services Limited | Hospitality | 2013 |
| Centre for Facilitation Limited | Professional & scientific | 2011 |
| Cheap Taxi Hire Ltd | Extraterritorial | 2013 |
| Cheema Organization Ltd | Other services | 2015 |
| Cheema Property Management Ltd | Real estate | 2019 |
| Chief Engineering Services Ltd | Professional & scientific | 2020 |
| Child Lane Properties Limited | Construction | 1992 |
| Chiltern Homes Ltd | Construction | 2013 |
| Chris Firth Creative Ltd | Arts & recreation | 2025 |
| Church Farm (Roberttown) Management Company Limited | Real estate | 2006 |
| Church Meadows RTM Company Limited | Households | 2012 |
| Cigitali Limited | Information & communication | 2018 |
| Clarke & SON Transport Ltd | Other services | 2017 |
| Class Fit Gym Ltd | Arts & recreation | 2024 |
| Clear Dynamics Ltd | Information & communication | 2025 |
| Cleckheaton Carpets Ltd | Wholesale & retail | 2014 |
| Cleckheaton Construction Limited | Construction | 1997 |
| CLN Landscape Limited | Administrative & support | 2007 |
| CLOUD2AI Services Ltd | Information & communication | 2024 |
| Cloudphn Ltd | Wholesale & retail | 2020 |
| Coffeesafe Limited | Administrative & support | 2016 |
| Company Identity Protection Limited | Other services | 2010 |
| Compass Executive Travel Ltd | Transport & logistics | 2020 |
| Complete Organisers Limited | Administrative & support | 2004 |
| Concept to Creation Joinery Limited | Construction | 2023 |
| Copley Management Services Limited | Real estate | 2019 |
| Coravant Limited | Information & communication | 2018 |
| Core Build Yorkshire Ltd | Construction | 2025 |
| Core Team One Ltd | Information & communication | 2018 |
| Cornerstones Freehold Limited | Households | 2025 |
| Cornmill Construction Ltd | Construction | 2016 |
| Cornmill Developments Limited | Real estate | 2024 |
| Corporate Event Tickets Ltd | Administrative & support | 2021 |
| County Scales North Ltd | Manufacturing | 2014 |
| Cozy Hub Ltd | Manufacturing | 2024 |
| Crawshaw Dental Equipment Repairs LLP | | 2025 |
| Credit Crunch Killer Limited | Professional & scientific | 2020 |
| Crescentia Properties Ltd | Real estate | 2026 |
| Crowlees Properties Ltd | Real estate | 2020 |
| Crowther Plumbing & Heating Ltd | Construction | 2024 |
| CSC Care Limited | Health & social care | 2020 |
| CTM Yorkshire Ltd | Health & social care | 2019 |
| Cubicle Store Limited | Extraterritorial | 2019 |
| Cyber CAB Claims Ltd | Transport & logistics | 2024 |
| Cyber Taxis Limited | Transport & logistics | 2024 |
| Cyberlizing Ltd | Professional & scientific | 2026 |
| D & H Wooller Holdings Limited | Financial services | 2024 |
| Daisy Day Care (Ampleforth) Ltd | Health & social care | 2026 |
| Danjames Construction Yorkshire Ltd | Construction | 2023 |
| Danjames Holdings Limited | Real estate | 2025 |
| Darsons BED Shop Limited | Wholesale & retail | 2018 |
| Dartwood (Yorkshire) Limited | Professional & scientific | 2018 |
| Deadshot Limited | Transport & logistics | 2025 |
| Delta Floors Limited | Construction | 2022 |
| Demo Group Limited | Construction | 2017 |
| Derma Revive Skincare Ltd | Wholesale & retail | 2021 |
| Dicklewick Properties Limited | Real estate | 2022 |
| Dinheiro Consulting Limited | Financial services | 2013 |
| Direct Part X Ltd | Wholesale & retail | 2021 |
| DIS (Dedicated Industry Services) Ltd | Manufacturing | 2024 |
| Diskin Capital Partners Ltd | Professional & scientific | 2013 |
| Dockentail Properties Ltd | Real estate | 2017 |
| Dougs Vintage Limited | Wholesale & retail | 2024 |
| Draco Limited | Construction | 2016 |
| Drcolindent Ltd | Health & social care | 2025 |
| Drift Manji RC Ltd | Wholesale & retail | 2019 |
| Duarrinp Ltd | Health & social care | 2023 |
| Dunbar Management Services Limited | Extraterritorial | 1994 |
| DW Credit Hire Ltd | Administrative & support | 2019 |
| DW Gym Equipment Limited | Arts & recreation | 2021 |
| DW Payroll Services Ltd | Professional & scientific | 2026 |
| Dynentity Limited | Information & communication | 2021 |
| Dyslexia Results Limited | Extraterritorial | 2016 |
| E.C. Dewhirst Chiropody & Podiatry Limited | Health & social care | 2007 |
| E.H. Project Management Limited | Professional & scientific | 2014 |
| Eafh Alternative Ltd | Financial services | 2026 |
| Eafh Properties Ltd | Real estate | 2023 |
| Eastern Rentals Ltd | Administrative & support | 2015 |
| ED Cooper - Global Services Limited | Information & communication | 2025 |
| Edence's Limited | Hospitality | 2019 |
| Edmondsons IT Services Limited | Information & communication | 2011 |
| Elite Partnership Supplies Ltd | Wholesale & retail | 2012 |
| Elite Project Management Ltd | Construction | 2024 |
| Elland Taxis Ltd | Transport & logistics | 2014 |
| Elsie Kelly Interior Solutions Limited | Wholesale & retail | 2024 |
| Elsie’S Deli Limited | Hospitality | 2025 |
| Emily Rose Business Management Ltd | Professional & scientific | 2023 |
| EMS (Hartshead) Ltd | Manufacturing | 2003 |
| Enclave Electrical Ltd | Construction | 2025 |
| Energy Plus Management Ltd | Energy | 2009 |
| Ents Creative Ltd | Wholesale & retail | 2025 |
| Ents Group Ltd | Arts & recreation | 2024 |