| Colin Whitelaw Ltd | Administrative & support | 2017 |
| Colin Wong Design Ltd | Wholesale & retail | 2022 |
| Colinbricks Solutions Ltd | Construction | 2025 |
| Colinsburgh Properties Ltd | Real estate | 2018 |
| Colinton Building Services Ltd | Construction | 2018 |
| Colinton Cabs Ltd | Transport & logistics | 2025 |
| Colinton Cattery Ltd | Other services | 2019 |
| Colinton Dell Consultants Ltd | Professional & scientific | 2008 |
| Colinton Investments Limited | Real estate | 2021 |
| Colinton Limited | Extraterritorial | 2002 |
| Colinton Nurseries Limited | Education | 2003 |
| Colinton Property Services Ltd | Administrative & support | 2026 |
| Colinton Store Ltd | Wholesale & retail | 2017 |
| Colinton Trading LP | | 2012 |
| Colkitchen Ltd | Wholesale & retail | 2021 |
| Collab Studio Company Limited | Information & communication | 2025 |
| Collace Solar Limited | Energy | 2021 |
| Collatersys Ltd | Information & communication | 2019 |
| Colle Mattia LP | | 2016 |
| Collecta Systems L.P. | | 2012 |
| Collectionhq Limited | Information & communication | 2025 |
| Collective Beauty Ltd | Other services | 2015 |
| Colleen's Culturelounge Salon Ltd | Other services | 2024 |
| College FUN Games Limited | Information & communication | 2024 |
| Collegium 130 Limited | Construction | 1992 |
| Collem One LP | | 2014 |
| Collem Union LP | | 2015 |
| Collenton Trading LP | | 2014 |
| Collin Consulting Ltd | Professional & scientific | 2024 |
| Collinalitics Ltd | Information & communication | 2026 |
| Colling Steel LP | | 2017 |
| Collins & Okrah Ltd | Information & communication | 2026 |
| Collins and Co Defence Lawyers Limited | Professional & scientific | 2020 |
| Collins Building Limited | Construction | 2017 |
| Collins Business Services Limited | Professional & scientific | 1992 |
| Collins Corporation Holdings LP | | 2019 |
| Collins Corporation LP | | 2016 |
| Collins Johnson (Caledonia) Limited | Administrative & support | 2022 |
| Collinson Ceramics Holdings Limited | Financial services | 2020 |
| Colomba Aragosta Limited Partnership | | 2023 |
| Colombina Services LP | | 2002 |
| Colonel Russo Ltd | Real estate | 2025 |
| Colonic Health Ltd | Health & social care | 2023 |
| Colonnade Alliance LP | | 2013 |
| Colonsay Cars Ltd | Extraterritorial | 2020 |
| Colonsay Consulting Limited | Professional & scientific | 2014 |
| Colonsay Holiday Properties Limited | Hospitality | 2011 |
| Colonsay Ltd | Real estate | 2024 |
| Color Capital LP | | 2015 |
| Color TEX LP | | 2016 |
| COLOR4YOU Ltd | Construction | 2025 |
| Colorado Trade LP | | 2016 |
| Coloradobit L.P. | | 2018 |
| Colorsound Studios Ltd | Information & communication | 2026 |
| Colossal LP | | 2015 |
| Colosseum Fitness and Strength Limited | Arts & recreation | 2024 |
| Coloteks Resources LP | | 2013 |
| Colour Academy Publishing Limited | Information & communication | 2018 |
| Colour Printing Limited | Construction | 2018 |
| Colours (Scotland) L.P. | | 2011 |
| Colours Carnival Ltd | Arts & recreation | 2019 |
| Colourtech Decorators Ltd | Construction | 2022 |
| Colpitts World Travel Ltd. | Administrative & support | 1995 |
| Coltbridge Consulting Ltd | Real estate | 2016 |
| Coltbridge IT Services Ltd | Information & communication | 2021 |
| Colton Ventures LP | | 2014 |
| Colucci & CIE LP | | 2025 |
| Columba Tech Ltd | Information & communication | 2019 |
| Columbia Threadneedle (Services) Limited | Administrative & support | 2002 |
| Columbia Threadneedle AM (Holdings) Limited | Financial services | 1980 |
| Columbia Threadneedle Investment Business Limited | Other services | 1994 |
| Columbia Threadneedle PE Co-Investment FP LP | | 2016 |
| Columbia Threadneedle PE Co-Investment GP LLP | | 2016 |
| Columbia/Patron Scotland LP | | 2004 |
| Columbine SLP | | 1999 |
| Columbus UK Founder L.P. | | 2008 |
| Colvert Travel & Properties L.P. | | 2011 |
| Colvinaire Limited | Professional & scientific | 1970 |
| Colwill Beauty Ltd | Wholesale & retail | 2025 |
| Comax Group L.P. | | 2009 |
| Comax Solutions L.P. | | 2011 |
| Comax Technology L.P. | | 2011 |
| Combine Recruitment Ltd | Professional & scientific | 2022 |
| Combined Extract / Trickle Ventilation Systems Limited | Administrative & support | 1996 |
| COMBO.99 (1) Limited | Hospitality | 2021 |
| COMBO.99 (2) Limited | Hospitality | 2021 |
| Combogreen (UK) Limited | Manufacturing | 2022 |
| Comcarde Limited | Information & communication | 2013 |
| Comcotaym LP | | 2013 |
| Come Clean Services Ltd | Administrative & support | 2019 |
| Come True Ltd | Real estate | 2026 |
| Comedy Bars UN Limited | Hospitality | 2022 |
| Comely Construction Ltd | Construction | 2025 |
| Comelybank Limited | Information & communication | 2017 |
| Comerford Taxis | | 1998 |
| Comet Agency L.P. | | 2009 |
| Comet Industrial L.P. | | 2009 |
| Comet Intercity L.P. | | 2011 |
| Cometa LP | | 2016 |
| Comfort Care Health Ltd | Health & social care | 2024 |