| Catalyst Flows Limited | Professional & scientific | 2026 |
| Ccor Consulting Limited | Professional & scientific | 2026 |
| Cekay Building Services Limited | Construction | 2010 |
| Chan's Kitchen Takeaway Ltd | Hospitality | 2021 |
| Chant Holding Limited | Financial services | 2020 |
| Chant Properties North East Limited | Real estate | 2016 |
| Chapter 2 (HAH) Ltd | Hospitality | 2019 |
| Charlotte Emilie Photo Ltd | Professional & scientific | 2023 |
| Cherrywise Ltd | Financial services | 2024 |
| Chip N ERN Limited | Hospitality | 2015 |
| Choice Cleaning Solutions Ltd | Administrative & support | 2023 |
| Chris Newman Electrical Ltd | Construction | 2018 |
| City and Fort Properties Limited | Real estate | 2021 |
| Clarity Health Consultancy Ltd | Health & social care | 2020 |
| Classic Technology Limited | Information & communication | 2004 |
| Classy CUT Ltd | Other services | 2026 |
| Cleanluxe CL Ltd | Wholesale & retail | 2025 |
| Clear Choice Flooring Limited | Construction | 2025 |
| Clear JET Solutions Ltd | Administrative & support | 2025 |
| Clifden Consulting Limited | Professional & scientific | 2016 |
| Clockwork HR Limited | Administrative & support | 2007 |
| Co&Co Hair Salon Limited | Other services | 2019 |
| Coactive Consultancy Ltd | Professional & scientific | 2019 |
| COCKTAIL99 Ltd | Hospitality | 2023 |
| Cohmor Investments Limited | Real estate | 1987 |
| Colin Harrop Consulting Ltd | Professional & scientific | 2024 |
| College Mews 1994 Limited | Households | 1995 |
| Collis Mediation Limited | Professional & scientific | 2013 |
| Community Action Bradford & District Ltd. | Other services | 2001 |
| Composite Prime Group Limited | Financial services | 2018 |
| Composite Prime Limited | Wholesale & retail | 2015 |
| Construction & Joinery Limited | Construction | 2026 |
| Construction & Shopfitting Services Ltd | Construction | 1993 |
| Construction North Group Limited | Construction | 2020 |
| Coolpoint Services Ltd | Manufacturing | 2024 |
| Cooperative IT Ltd | Information & communication | 2022 |
| Cortex Wealth Management Ltd | Financial services | 2009 |
| Cottingley Care Club Ltd | Other services | 2010 |
| Cottingley Community Centre | Education | 2004 |
| Cottingley Drive and the Ghyll Ltd | Real estate | 2016 |
| COX 22 Limited | Real estate | 1926 |
| Craft House Cafe Ltd | Hospitality | 2019 |
| Creating - Abilities Limited | Professional & scientific | 1997 |
| Creo UK Holdings Limited | Wholesale & retail | 2025 |
| Critchlow-Watson Properties Ltd | Real estate | 2025 |
| Criteria Management & Research Ltd | Professional & scientific | 2013 |
| Crownest Mortgages Limited | Financial services | 2020 |
| CST Creative Limited | Information & communication | 2017 |
| Cubitt Cars Ltd | Wholesale & retail | 2020 |
| Curtis & Bell Limited | Other services | 2010 |
| Curtis (Wool) Holdings Limited | Extraterritorial | 1979 |
| Curtis Wool Direct Holdings Limited | Professional & scientific | 2002 |
| Curtis Wool Direct Limited | Wholesale & retail | 1980 |
| Custom Cosmetics Limited | Manufacturing | 2020 |
| Custom Hifi Cables Ltd | Manufacturing | 2010 |
| Cvia Ltd | Professional & scientific | 2009 |
| D & E Kitchen Limited | Hospitality | 2025 |
| D J Clow Properties Limited | Real estate | 2024 |
| D.A.N. Electrical Services Limited | Construction | 2003 |
| D4 Brand and Digital Ltd | Professional & scientific | 2022 |
| Dales Creative Web Design Ltd | Information & communication | 2026 |
| Dalesworth Consultants Ltd | Water & waste | 2016 |
| Damartex UK Limited | Wholesale & retail | 1965 |
| DAN Mercer Electrical Limited | Construction | 2017 |
| Dancing and Walking Holidays Ltd | Administrative & support | 2013 |
| David Brown Properties Limited | Construction | 2003 |
| David Greer Management Ltd | Real estate | 2021 |
| Davie R Limited | Information & communication | 2007 |
| DB Autowurks Ltd | Wholesale & retail | 2025 |
| DB Trading Company Yorkshire Ltd | Wholesale & retail | 2013 |
| DCD Property Services Ltd | Real estate | 2018 |
| Dcmi Ltd | Information & communication | 2014 |
| DCR Services (Construction and Assessment) Ltd | Professional & scientific | 2026 |
| De'Leigh Ltd | Professional & scientific | 2008 |
| Deavand Ltd | Wholesale & retail | 2020 |
| Definition Audio Visual Ltd | Information & communication | 2019 |
| Denholme House Farm (Management) Limited | Households | 2007 |
| DGB Fire Safety Ltd | Professional & scientific | 2025 |
| Digbidoo Ltd | Information & communication | 2025 |
| Dillan Solutions Ltd | Households | 2020 |
| Discovery Commercial Finance Limited | Financial services | 2022 |
| Discovery Financial Ltd | Financial services | 2019 |
| Display Factory Limited | Manufacturing | 2004 |
| Divergent Property Investments Ltd | Construction | 2023 |
| Diverse Displays Limited | Construction | 2003 |
| DLM Properties 247 Ltd | Real estate | 2025 |
| DO Management Systems Limited | Professional & scientific | 2021 |
| Doctorstraining Limited | Health & social care | 2017 |
| Dodeca Properties Ltd | Real estate | 2021 |
| Domestic Energy Experts Ltd | Professional & scientific | 2021 |
| DON Little Property Investments Ltd | Real estate | 2024 |
| DON Whitley Scientific Holdings Limited | Financial services | 2026 |
| DON Whitley Scientific Limited | Manufacturing | 1977 |
| Donate & WIN Ltd | Information & communication | 2024 |
| Door Repair Specialists Limited | Manufacturing | 1997 |
| Down Syndrome Training and Support Service Limited | Other services | 2009 |
| DR Bret Claxton Associates Limited | Health & social care | 2010 |
| DR MUB Ltd | Health & social care | 2025 |
| DR. Dadi Limited | Health & social care | 2013 |
| Dreamers WHO Travel Limited | Wholesale & retail | 2020 |