| C.F.S. (Brighouse) Limited | Other services | 2006 |
| C.Field Properties Ltd | Real estate | 2025 |
| C.G. Cleaning Limited | Other services | 2004 |
| C.H.P. Holdings Limited | Transport & logistics | 2006 |
| C.I.B.S. Holdings Limited | Professional & scientific | 1993 |
| C.J. Ellmore & Company Limited | Wholesale & retail | 1972 |
| C.J. Mannion Ltd | Health & social care | 2013 |
| C.J.T. Pvcu Window Repairs Ltd | Construction | 2002 |
| C.L.Schofield Group Ltd | Financial services | 2024 |
| C.L.Schofield Property Ltd | Real estate | 2022 |
| C.M. Limited | Construction | 1997 |
| C.M.M. Design Services Ltd. | Professional & scientific | 2001 |
| C.O'Donovan & Sons Limited | Manufacturing | 2018 |
| C.O. Plant Services Limited | Manufacturing | 2018 |
| C.O.T.C.Agency Limited | Professional & scientific | 2021 |
| C.P.Bennet.Limited | Financial services | 1932 |
| C.R.E.A.M Trading Ltd | Professional & scientific | 2017 |
| C.S Leedsrenovations Ltd | Construction | 2024 |
| C.S. Fabs Limited | Manufacturing | 2008 |
| C.Vaughan Tiling Contractors Ltd | Construction | 2014 |
| C.Y. Property Living Ltd | Real estate | 2025 |
| C2 Aesthetics Limited | Health & social care | 2017 |
| C21 Hygiene Ltd | Wholesale & retail | 2013 |
| C22 Holdings Limited | Financial services | 2022 |
| C22 Limited | Administrative & support | 1989 |
| C3 (Group) Limited | Professional & scientific | 2014 |
| C3 Capability Ltd | Professional & scientific | 2026 |
| C3 Estates Limited | Real estate | 2003 |
| C3 INVEST1 Limited | Financial services | 2024 |
| C45CADE Ltd | Financial services | 2023 |
| C4X Discovery Holdings Limited | Professional & scientific | 2014 |
| C4X Discovery Limited | Professional & scientific | 2007 |
| C7 Health Limited | Health & social care | 2018 |
| C7 Security Service Limited | Administrative & support | 2025 |
| CA & JTM Johnson Property Management Limited Partnership | | 2024 |
| CA 80 Consulting Ltd | Professional & scientific | 2025 |
| CA Boutique Ltd | Other services | 2022 |
| CA Cafe Bar Limited | Hospitality | 2026 |
| CA Fitness and Health Ltd | Other services | 2026 |
| CA Properties Leeds Limited | Real estate | 2022 |
| Caan Enterprise Ltd | Administrative & support | 2013 |
| CAB & SON Property Solutions Limited | Construction | 2020 |
| CAB Property Solutions Limited | Real estate | 2025 |
| Cabbi Sales Ltd | Wholesale & retail | 2019 |
| Cabe Ltd | Information & communication | 2017 |
| Cabix Ltd | Administrative & support | 2026 |
| Cabled Ltd | Information & communication | 2018 |
| Cablenet (Leeds) Limited | Information & communication | 1996 |
| Cactus Brain Studios Ltd | Information & communication | 2026 |
| Cactus Jacks Limited | Hospitality | 2020 |
| Cactus Mechanical Ltd | Construction | 2020 |
| Cactus Pictures Ltd | Information & communication | 2023 |
| CAD - Poultry Ltd | Wholesale & retail | 2013 |
| CAD Accounting Ltd | Professional & scientific | 2012 |
| CAD Design and Build Services Limited | Construction | 2011 |
| CAD Investments Limited | Real estate | 2002 |
| CAD Scaffolding Ltd | Construction | 2024 |
| Cad-Fab Limited | Manufacturing | 1990 |
| Cade Building Services Limited | Construction | 2009 |
| Cademi Ltd | Education | 2021 |
| Caden's Window Cleaning Ltd | Administrative & support | 2025 |
| Cadence Financial Planning Limited | Financial services | 2022 |
| Cadencia Limited | Information & communication | 2016 |
| Cadencio Ltd | Administrative & support | 2026 |
| Cadenza Distribution (UK) Limited | Wholesale & retail | 2016 |
| Cadge Ltd | Real estate | 2023 |
| Cadhouse Limited | Construction | 2003 |
| Cadihayes Services (NO 3) Limited | Professional & scientific | 1919 |
| Cadlam Wealth Limited | Financial services | 2023 |
| Cadogan Berkley Ltd | Financial services | 2020 |
| Cadore Ltd | Construction | 2024 |
| Cads Investments | Financial services | 2014 |
| Cads Land | Financial services | 2016 |
| Caelex Aesthetics Ltd | Other services | 2025 |
| Caesarland Healthcare Limited | Health & social care | 2026 |
| Caesars AI Ltd | Hospitality | 2021 |
| Caesars Food Limited | Hospitality | 2026 |
| Caesars Gelato Ltd | Hospitality | 2021 |
| Caesars Joint IP Company Limited | Financial services | 2021 |
| Caesars Kippax Leeds Ltd | Hospitality | 2025 |
| Caesars Kitchen Kippax Ltd | Hospitality | 2025 |
| Caesars Removals Ltd | Water & waste | 2025 |
| Caesars Trading and Technology Services Limited | Financial services | 2021 |
| CAF Bakes Ltd | Hospitality | 2025 |
| CAF Farsley Ltd | Hospitality | 2023 |
| CAF Property Limited | Real estate | 2021 |
| Cafe 11:11 Ltd | Manufacturing | 2025 |
| Cafe Bar Twelve Limited | Hospitality | 2011 |
| Cafe Capri - Drive Through Ltd | Hospitality | 2022 |
| Cafe Capri Woodkirk Ltd | Hospitality | 2024 |
| Cafe Espresso RAD Ltd | Hospitality | 2022 |
| Cafe Express (Yorkshire) Ltd | Hospitality | 2017 |
| Cafe Flying Pizza Limited | Hospitality | 2021 |
| Cafe Forista Ltd | Hospitality | 2025 |
| Cafe Gourmand Limited | Hospitality | 2009 |
| Cafe Kofe Ltd | Hospitality | 2025 |
| Cafe Lago DI Como Ltd | Hospitality | 2022 |
| Cafe Manana Ltd | Hospitality | 2025 |
| Cafe MEL Ltd | Hospitality | 2026 |
| Cafe VU Limited | Hospitality | 2026 |