| C F Bell Financial Consultant Ltd | Financial services | 2008 |
| C F Phones & Vapes Ltd | Wholesale & retail | 2023 |
| C G LEE Electrical Engineers Limited | Energy | 2006 |
| C H S Vehicles Limited | Administrative & support | 2009 |
| C Harman Financials Ltd | Professional & scientific | 2015 |
| C Harness Limited | Other services | 2004 |
| C Hewitson Financial Services Ltd | Financial services | 2013 |
| C I Cuisine (Headingley) Ltd | Hospitality | 2018 |
| C J B Plumbing & Heating Ltd | Construction | 2021 |
| C J Dawson Services Ltd | Professional & scientific | 2011 |
| C J Dobson Group Ltd | Administrative & support | 2026 |
| C J Smith (Motors) Limited | Real estate | 1964 |
| C J Veronix Limited | Financial services | 2013 |
| C JAZ Joinery Consultancy Ltd | Construction | 2021 |
| C K Cyprus Limited | Real estate | 2021 |
| C L D S Limited | Transport & logistics | 1994 |
| C L Electrical (Yorkshire) Ltd | Manufacturing | 2021 |
| C L Finance Limited | Financial services | 1973 |
| C L G Developments Limited | Construction | 2008 |
| C L J Connect Limited | Energy | 2007 |
| C L Rhodes Electrical Ltd | Construction | 2026 |
| C L Rope Access Limited | Construction | 2017 |
| C L Stewart Roofing Limited | Construction | 2024 |
| C L Todd Consulting Ltd | Information & communication | 2022 |
| C L Wood Consultants Limited | Professional & scientific | 2026 |
| C M Law | Real estate | 2010 |
| C M V Orthodontics Limited | Health & social care | 2012 |
| C M Webb Developments Limited | Construction | 2026 |
| C N Medical Services Limited | Health & social care | 2018 |
| C Nicol Holdings Limited | Professional & scientific | 2025 |
| C R Design 2000LTD Ltd | Manufacturing | 2025 |
| C R Electrical Services Limited | Construction | 2015 |
| C R Motorsport Ltd | Wholesale & retail | 2014 |
| C S Dairies Ltd | Wholesale & retail | 2019 |
| C S Garage Doors Limited | Construction | 2019 |
| C Senior Creative Limited | Professional & scientific | 2021 |
| C Sheils Enterprise Ltd | Construction | 2024 |
| C Siddons Limited | Health & social care | 2019 |
| C Smith IR Limited | Arts & recreation | 2023 |
| C Speers Limited | Health & social care | 2014 |
| C T D Plumbing & Heating Limited | Construction | 2003 |
| C T Fire Systems Ltd | Construction | 2023 |
| C T Glass Holdings Limited | Financial services | 2016 |
| C T Langan Limited | Professional & scientific | 2018 |
| C W Harwood & Co Holdings Limited | Financial services | 2025 |
| C W Harwood & Co Limited | Professional & scientific | 2017 |
| C W Langton Limited | Construction | 2015 |
| C W Property Development Ltd | Real estate | 2020 |
| C W Roofing (Leeds) Limited | Construction | 2021 |
| C W Roofing (Wakefield) Limited | Construction | 2021 |
| C W Roofing Specialists Ltd | Construction | 2026 |
| C Walton Nominees Limited | Extraterritorial | 2019 |
| C Y Sweeps & Services Ltd | Information & communication | 2024 |
| C&A Foods Ltd | Hospitality | 2025 |
| C&A Properties (2014) Limited | Real estate | 2014 |
| C&A Properties (Leeds) Ltd | Real estate | 2025 |
| C&A Sales Ltd | Wholesale & retail | 2016 |
| C&C Consulting & Investment Ltd | Information & communication | 2017 |
| C&C Nail Spa Ltd | Other services | 2024 |
| C&C Nexus Ltd | Hospitality | 2025 |
| C&C28 Ltd | Transport & logistics | 2010 |
| C&D General Building Services Ltd | Construction | 2016 |
| C&D Holdings (Leeds) Ltd | Hospitality | 2022 |
| C&E Jackson Estates Limited | Real estate | 2023 |
| C&G Plumbing and Heating (Yorkshire) Ltd | Construction | 2022 |
| C&G Property Leeds Ltd | Real estate | 2025 |
| C&H Electrical Solutions Ltd | Construction | 2025 |
| C&J Creative Media Ltd | Wholesale & retail | 2025 |
| C&Kmallinson-Brown Ltd | Hospitality | 2020 |
| C&L Commercial Services Ltd | Wholesale & retail | 2024 |
| C&L Holdings (Sussex) Ltd | Financial services | 2023 |
| C&M Builders U.K Ltd | Construction | 2015 |
| C&M Civil Engineering Limited | Construction | 2026 |
| C&M WD Ltd | Health & social care | 2020 |
| C&R Wedding Cars Ltd | Transport & logistics | 2018 |
| C&W Cleaning Services Ltd | Administrative & support | 2026 |
| C&Y Harrogate Sushi Ltd | Hospitality | 2024 |
| C-Gray Wellbeing Ltd | Professional & scientific | 2021 |
| C-Med Solutions Ltd | Wholesale & retail | 2020 |
| C-Training Innovation Centre Ltd | Education | 2023 |
| C. & E. Bloom (Holdings) Limited | Real estate | 1960 |
| C. a. Parkinson Electrical Contractors Ltd. | Manufacturing | 2019 |
| C. Hazlehurst Plumbing and Property Services Limited | Construction | 1992 |
| C. Russell (Stonemerchants) Limited | Arts & recreation | 1978 |
| C. Sharp Construction Limited | Construction | 1980 |
| C. Walton Limited | Wholesale & retail | 1955 |
| C. Yates Antiques Ltd | Wholesale & retail | 2023 |
| C.A.M.Entertainment Ltd | Arts & recreation | 2025 |
| C.A.R.E. CFE | Hospitality | 2008 |
| C.A.T Transport 21 Ltd | Transport & logistics | 2023 |
| C.Aesthetics Ltd | Other services | 2021 |
| C.B. Construction (Cleveland) Limited | Construction | 1990 |
| C.C& Co Ltd | Hospitality | 2018 |
| C.C.N. Limited | Construction | 1978 |
| C.C.S. (Leeds) Limited | Information & communication | 1998 |
| C.C.V. (North West) Ltd | Extraterritorial | 1997 |
| C.D.F. (Office Furniture) Limited | Wholesale & retail | 1999 |
| C.F. Booth (Doncaster) Limited | Water & waste | 1980 |
| C.F. Booth (Engineering) Limited | Manufacturing | 1980 |
| C.F.Booth Limited | Manufacturing | 1949 |