| Codion Ltd | Information & communication | 2017 |
| Codium Invest LP | | 2017 |
| Codium Partners LP | | 2017 |
| Codner Management LP | | 2012 |
| Codnor Trade LP | | 2013 |
| Codojo Limited | Information & communication | 2013 |
| Codry IT Limited | Information & communication | 2026 |
| Cody Genetics Limited | Professional & scientific | 2022 |
| Codæh Ltd | Construction | 2022 |
| Coenact Limited | Information & communication | 2025 |
| Coeur Defense PT Investor LP | | 2007 |
| Coeus Solutions Ltd | Professional & scientific | 2023 |
| Coffee ADV LP | | 2007 |
| Coffee and Co UK Limited | Wholesale & retail | 2026 |
| Coffee ETC Ltd | Hospitality | 2021 |
| Coffee Inc. (Borders) Limited | Hospitality | 2023 |
| Coffee Nexus Limited | Manufacturing | 2009 |
| Coffee Tepuy Ltd | Wholesale & retail | 2020 |
| Coffee Waves Ltd | Hospitality | 2020 |
| Coffeecup IT LP | | 2014 |
| Coffeeyay Ltd | Other services | 2013 |
| Coflavius Ltd | Real estate | 2026 |
| Cogbooks Limited | Administrative & support | 2004 |
| Cogent Paper Ltd | Manufacturing | 2026 |
| Cogent SSC Limited | Public administration | 1991 |
| Coggshall Investment Trading (Scotland) Partnership SP | | 2022 |
| Cogito Limited | Information & communication | 2026 |
| Cogknit Labs Limited | Information & communication | 2025 |
| Cogmission Limited | Administrative & support | 2018 |
| Cognishift Limited | Information & communication | 2025 |
| Cognitium Hub LP | | 2024 |
| Cognitive Cloud L.P. | | 2017 |
| Cognitive Counselling Ltd | Health & social care | 2022 |
| Cognitive Functional Therapy Ltd | Extraterritorial | 2014 |
| Cognix Solutions Ltd | Information & communication | 2025 |
| Cognizense LLP | | 2019 |
| Coguk Ltd | Education | 2022 |
| Cohen Services Ltd | Construction | 2025 |
| Cohenit Limited | Extraterritorial | 2018 |
| Cohere Studio Ltd | Professional & scientific | 2018 |
| Coherent Bits Limited | Information & communication | 2010 |
| Coherent Technical Services Ltd | Professional & scientific | 2025 |
| Cohort Studios Limited | Information & communication | 2006 |
| Coilltean International Company Limited | Administrative & support | 2003 |
| Coilsfield Investment Trading (Scotland) Partnership SP | | 2022 |
| Coimhearsnachd Limited | Administrative & support | 2018 |
| Coinyie House Properties Ltd | Real estate | 2018 |
| Coire Ault Estate Limited | Hospitality | 2025 |
| Coire Ltd | Real estate | 2026 |
| Coire NA Cloiche Windfarm Holdings Ltd | Financial services | 2016 |
| Coire NA Cloiche Windfarm LLP | | 2013 |
| Coiribe Ltd | Administrative & support | 2025 |
| COL Cambro Limited | Information & communication | 2022 |
| Colaba Biomedical PVT Limited | Professional & scientific | 2017 |
| Colaco Consulting Ltd | Professional & scientific | 2014 |
| Colaks Properties Ltd | Real estate | 2024 |
| Colass Ltd | Administrative & support | 2019 |
| Colbert Investments Ltd | Real estate | 2025 |
| Colbren Investments Limited | Financial services | 2022 |
| Cold Breeze LP | | 2015 |
| Cold Fall Advisory LP | | 2016 |
| Cold Lands Ltd. | Health & social care | 2009 |
| Cold Northern Outpost LP | | 2024 |
| Cold Work Technology Limited | Wholesale & retail | 2005 |
| Coldex Enterprises L.P. | | 2011 |
| Coldex International L.P. | | 2009 |
| Coldex L.P. | | 2009 |
| Coldfire Limited | Wholesale & retail | 2025 |
| Coldmont Systems LP | | 2014 |
| Coldspring Property Consultants Limited | Real estate | 2010 |
| Coldwells Farm Limited | Administrative & support | 2003 |
| Cole SLP | | 1998 |
| Coleford Partners LP | | 2015 |
| Colefort Corporation LP | | 2012 |
| Coleman Global LP | | 2016 |
| Colemanwealth Ltd | Real estate | 2022 |
| Colenso Systems LP | | 2015 |
| Colepark Trade LP | | 2012 |
| Coleridge (East Grinstead 1) Limited | Professional & scientific | 2002 |
| Coleridge (East Grinstead 2) Limited | Professional & scientific | 2002 |
| Colesagency Ltd | Administrative & support | 2026 |
| Coletti & Co Ltd | Hospitality | 2013 |
| Colford Management LP | | 2016 |
| Colham Solutions LP | | 2013 |
| Colia Investments Limited | Real estate | 2012 |
| Colibria Logistics LP | | 2015 |
| Colibria Solutions LP | | 2016 |
| Colibria Ventures LP | | 2015 |
| Coliedous Strategy Ltd | Information & communication | 2026 |
| Colif Services LP | | 2016 |
| Colin Campbell Sports Limited | Other services | 1986 |
| Colin Douglas Consulting Limited | Mining & quarrying | 2021 |
| Colin Export L.P. | | 2012 |
| Colin Galbraith Environment Limited | Professional & scientific | 2010 |
| Colin Happer Ltd | Professional & scientific | 2009 |
| Colin Kerr Consultancy Ltd | Professional & scientific | 2014 |
| Colin RAE Development Solutions Ltd | Construction | 2019 |
| Colin Stephen Broadcast Services Limited | Information & communication | 1996 |
| Colin Stephen Grieve Consulting Limited | Real estate | 2022 |
| Colin Stewart Joinery Limited | Construction | 2023 |