| Codeer Labs Ltd | Information & communication | 2026 |
| Codegent Limited | Information & communication | 2004 |
| Codelogicx Ltd | Information & communication | 2024 |
| Coderholics Ltd | Information & communication | 2023 |
| Codestay Limited | Construction | 1987 |
| Codestorm Holdings Limited | Other services | 2017 |
| Codestorm Limited | Administrative & support | 2014 |
| Codestorm Share 1 Ltd | Financial services | 2023 |
| Codetailors UK Limited | Information & communication | 2025 |
| Codevate Limited | Information & communication | 2013 |
| Coding World Ltd | Information & communication | 2016 |
| Cody Construction Ltd. | Construction | 2015 |
| Codza Limited | Health & social care | 2019 |
| Coeus Creative Limited | Information & communication | 2012 |
| Cofetaria E&E Ltd | Wholesale & retail | 2025 |
| Coffare Ltd | Professional & scientific | 2014 |
| Coffee & Cafe @ 268 Ltd | Hospitality | 2022 |
| Coffee & Canapes Limited | Extraterritorial | 2015 |
| Coffee and Clay Shop Ltd | Wholesale & retail | 2018 |
| Coffee at the Wood Ltd | Hospitality | 2025 |
| Coffee Beans Coffee Machines Limited | Wholesale & retail | 2017 |
| Coffee BLU CBD Ltd | Wholesale & retail | 2022 |
| Coffee Break Ltd | Hospitality | 2024 |
| Coffee JH Limited | Hospitality | 2025 |
| Coffee Joint Ltd | Hospitality | 2023 |
| Coffee Shack by Wood Reinvented Ltd | Wholesale & retail | 2023 |
| Coffee Tails Ltd | Hospitality | 2020 |
| Coffee Tales Bakery Ltd | Wholesale & retail | 2021 |
| Coffee Tales Harborne T/A Coffee Tales Ltd | Hospitality | 2021 |
| Coffee Tales Ltd | Hospitality | 2014 |
| Coffee Time (B'Ham) Limited | Hospitality | 2015 |
| Coffee Wizards Sutton Limited | Hospitality | 2020 |
| Coffee&Co Limited | Wholesale & retail | 2025 |
| Coffey Comms Ltd | Information & communication | 2014 |
| Coffey House Ltd | Information & communication | 2026 |
| Coffier Style Ltd | Wholesale & retail | 2021 |
| Coffika Van Limited | Hospitality | 2018 |
| Cofihealthcare UK 1 Co Limited | Financial services | 2021 |
| Cofihealthcare UK 2 Limited | Financial services | 2021 |
| Cofthill Ltd | Professional & scientific | 2019 |
| Cofton 1959 Limited | Extraterritorial | 2014 |
| Cofton Bark Ltd | Other services | 2026 |
| Cofton Construction Ltd | Construction | 2016 |
| Cofton Drainage and Jetting Services Ltd | Water & waste | 2020 |
| Cofton Drives Limited | Professional & scientific | 2009 |
| Cofton Educational Services Limited | Education | 2021 |
| Cofton Financial Limited | Professional & scientific | 2023 |
| Cofton Gardens Limited | Households | 1964 |
| Cofton Lake Conservation Limited | Other services | 2004 |
| Cofton News & Wines Ltd | Wholesale & retail | 2017 |
| Cofton Security K9 Division Ltd | Administrative & support | 2023 |
| Cofton Security K9 Ltd | Administrative & support | 2020 |
| COG Building Services Ltd | Construction | 2024 |
| COG Nation CIC | Manufacturing | 2025 |
| Coganscampers Ltd | Manufacturing | 2024 |
| Cogent Ventures Limited | Professional & scientific | 2012 |
| Cognatrix Limited | Wholesale & retail | 2024 |
| Cognavex Ltd | Information & communication | 2026 |
| Cognex UK, Ltd | Manufacturing | 1987 |
| Cognicare Ltd | Administrative & support | 2025 |
| Cognis LAB Ltd | Professional & scientific | 2015 |
| Cognition Agency Limited | Professional & scientific | 2011 |
| Cognition Consult Limited | Professional & scientific | 2012 |
| Cognitive Behavioural Transformation Ltd | Health & social care | 2025 |
| Cognitive Models and Technologies Ltd | Wholesale & retail | 2023 |
| Cognitive Wellness CIC | Health & social care | 2022 |
| Cogniy Ltd | Professional & scientific | 2025 |
| Coherent Accounting Limited | Professional & scientific | 2022 |
| Coherent Comms Limited | Professional & scientific | 2016 |
| Cohesion Better Together Ltd | Other services | 2025 |
| Cohesive Care Limited | Education | 2022 |
| Cohesive Co-Living Limited | Real estate | 2025 |
| Cohiba Concepts Ltd | Other services | 2019 |
| Cohlidy Ltd | Construction | 2025 |
| COI Trans Ltd | Construction | 2024 |
| Coin Vine Ltd | Wholesale & retail | 2018 |
| Coiniston Cook Limited | Professional & scientific | 2017 |
| COL8 Store Ltd | Wholesale & retail | 2020 |
| Colab Digital Limited | Information & communication | 2018 |
| Colart Pension Trustees Limited | Administrative & support | 1999 |
| Colas (Gabon) UK Limited | Construction | 2017 |
| Colas Limited | Construction | 1991 |
| Colas UK Projects Limited | Construction | 2020 |
| Colbros Developments Limited | Real estate | 1987 |
| Colbros Properties Limited | Real estate | 1952 |
| Colchester Garden Works Limited | Construction | 2018 |
| Colcon Limited | Construction | 1924 |
| Cold Bridge Solutions Ltd | Hospitality | 2020 |
| Cold Chain Logistics Limited | Transport & logistics | 2026 |
| Cold Chain Technologies Ltd | Manufacturing | 2020 |
| Cold Minded Ltd | Wholesale & retail | 2025 |
| Coldly Drift Ltd | Wholesale & retail | 2025 |
| Coldman Ltd | Wholesale & retail | 2023 |
| Coldseal Group Limited | Wholesale & retail | 2003 |
| Coldstream Projects Ltd | Information & communication | 2024 |
| Coldtream Public House Limited | Hospitality | 2025 |
| Coldwell Community Coaching CIC | Education | 2023 |
| Cole & REA Ltd | Hospitality | 2017 |
| Cole River Park Management Limited | Real estate | 2008 |
| Cole Valley Community Services Community Interest Company | Health & social care | 2011 |