| Capri Bars Limited | Hospitality | 2025 |
| Capri Immingham Ltd | Hospitality | 2019 |
| Card Maker Ltd. | Arts & recreation | 2012 |
| Carnforth Construction Limited | Construction | 2021 |
| Carr Lane Chop Suey Limited | Hospitality | 2024 |
| Cars of Nottingham Ltd | Wholesale & retail | 2016 |
| Cartwright Engineering Limited | Manufacturing | 2023 |
| CAS Chilled Ltd | Transport & logistics | 2023 |
| Cass Training Ltd | Education | 2022 |
| CB Design & Build Ltd | Construction | 2019 |
| CB Tenancy Ltd | Households | 2025 |
| CBA Surveys Limited | Other services | 2007 |
| Cbfm Ltd | Administrative & support | 2008 |
| Celec Installations Limited | Construction | 2010 |
| Celestial Games Ltd | Wholesale & retail | 2024 |
| Centre for Innovation Ltd. | Professional & scientific | 2014 |
| CH Safety Services Cleethorpes Ltd | Construction | 2025 |
| Charlton Building & Construction Ltd | Construction | 2024 |
| Chawshin Mini Market Ltd | Wholesale & retail | 2025 |
| Childs Construction Ltd | Real estate | 2026 |
| Chris Morriss Vehicle Services Ltd | Transport & logistics | 2019 |
| Christian Hyde Limited | Other services | 2010 |
| Chyke Consult Ltd | Professional & scientific | 2025 |
| CJF Survey & Consultancy Services Ltd | Professional & scientific | 2014 |
| CJH Construction Management Ltd | Other services | 2014 |
| Cjhengineering Ltd | Professional & scientific | 2020 |
| CJP Engineering Limited | Other services | 2018 |
| Classic Home Cinema Ltd | Arts & recreation | 2026 |
| Claydens Guest House Limited | Hospitality | 2011 |
| Clear Waste Links Ltd | Other services | 2026 |
| Clee Accommodation Limited | Real estate | 2019 |
| Clee Beach Stop Ltd | Wholesale & retail | 2025 |
| Clee Bowls Club Ltd | Arts & recreation | 2022 |
| Clee Car Sales Ltd | Wholesale & retail | 2015 |
| Clee Consultants Ltd | Other services | 2026 |
| Clee Employment Services Ltd | Transport & logistics | 2026 |
| Clee Fadez Ltd | Other services | 2024 |
| Clee Fish Ltd | Hospitality | 2025 |
| Clee Hotel Limited | Hospitality | 2018 |
| Clee Motors Ltd | Wholesale & retail | 2015 |
| Clee OFF Licence and Convenience Store Ltd | Wholesale & retail | 2021 |
| Clee Rooms Limited | Hospitality | 2023 |
| Clee Shakes Ltd | Hospitality | 2021 |
| Clee Slush Limited | Hospitality | 2024 |
| Cleesby Consulting Limited | Professional & scientific | 2026 |
| Cleethorpe Builders Merchants Ltd | Wholesale & retail | 2022 |
| Cleethorpes Builders Merchants Ltd | Wholesale & retail | 2003 |
| Cleethorpes Cars Limited | Transport & logistics | 2021 |
| Cleethorpes Coastal Lettings Ltd | Real estate | 2022 |
| Cleethorpes Cricket Club Limited | Arts & recreation | 2016 |
| Cleethorpes Dental Practice Limited | Health & social care | 2012 |
| Cleethorpes Educational Psychology Ltd | Education | 2022 |
| Cleethorpes Engineering Services Limited | Professional & scientific | 2024 |
| Cleethorpes Food & Wine Limited | Wholesale & retail | 2014 |
| Cleethorpes Golf Club (1894) Limited | Arts & recreation | 2004 |
| Cleethorpes Golf Club Trading Limited | Hospitality | 2016 |
| Cleethorpes Hair Lounge Ltd | Other services | 2018 |
| Cleethorpes Holiday Homes Ltd | Hospitality | 2023 |
| Cleethorpes Kitchen Centre Limited | Manufacturing | 1997 |
| Cleethorpes Light Railway Limited | Transport & logistics | 2014 |
| Cleethorpes Masonic Hall Limited | Hospitality | 1952 |
| Cleethorpes Mobility Centre Limited | Health & social care | 2014 |
| Cleethorpes Pubs Limited | Hospitality | 2025 |
| Cleethorpes Rock Co. Ltd. | Wholesale & retail | 2015 |
| Cleethorpes Showground Caravan Park Ltd | Hospitality | 2008 |
| Cleethorpes Sports Bar Ltd | Hospitality | 2025 |
| Cleethorpes Swim Academy Limited | Education | 2025 |
| Cleethorpes Tourist Agency Limited | Administrative & support | 2003 |
| Cleethorpesbaked Ltd | Manufacturing | 2026 |
| Clifford Engineering Services Ltd | Professional & scientific | 2023 |
| Clifford Peart (Cleethorpes) Limited | Real estate | 1963 |
| Clouds Clothing Limited | Wholesale & retail | 2002 |
| Cloudview Management Limited | Professional & scientific | 2012 |
| Cloverleaf Construction ( Lincs) Limited | Construction | 2025 |
| Club Four Ltd | Wholesale & retail | 2025 |
| Clytherm Ltd | Construction | 2025 |
| CM Auto Repairs Limited | Wholesale & retail | 2018 |
| CM Lets Ltd | Real estate | 2025 |
| Cmaj Limited | Hospitality | 2025 |
| CMK Travel Limited | Administrative & support | 2023 |
| Coastal Capital SPV Limited | Construction | 2023 |
| Coastal Memories Ltd | Manufacturing | 2023 |
| Coastal Silver Ltd | Manufacturing | 2019 |
| Coastal Views Cleethorpes Limited | Real estate | 2023 |
| Coastal Workshops Ltd | Arts & recreation | 2019 |
| Codaspire Limited | Extraterritorial | 2013 |
| Codde Recruitment Ltd | Administrative & support | 2025 |
| CODIN45 Ltd | Hospitality | 2025 |
| Colin R. Pettigrew Associates Ltd | Professional & scientific | 2025 |
| Collado Dent Limited | Health & social care | 2012 |
| Collins Design & Engineering Limited | Professional & scientific | 2013 |
| Columbus Data Limited | Professional & scientific | 2022 |
| Comley Cameras Limited | Wholesale & retail | 2015 |
| Company Ucda Limited | Arts & recreation | 2025 |
| Compass North Solutions (UK) Limited | Information & communication | 2026 |
| Complete Compliance Services Ltd | Professional & scientific | 2017 |
| Composite Panel Systems Ltd | Other services | 2010 |
| Construction Services Direct Limited | Construction | 2009 |
| Contractability Limited | Professional & scientific | 1994 |
| Controlled Environment Installations Limited | Construction | 2020 |