| Coinsec (UK) Limited | London | 2022 |
| Coinverve Ltd | London | 2026 |
| Coinz Limited | Cambridge | 2009 |
| Coire NA Cloiche Windfarm Holdings Ltd | Edinburgh | 2016 |
| Coish Properties Ltd | North Walsham | 2026 |
| Cojf Ltd | London | 2024 |
| Cojp Holdings Limited | London | 2021 |
| Coju Group Ltd | London | 2023 |
| Coke Finance Ltd | Manchester | 2024 |
| Cokelly Limited | Chesterfield | 2026 |
| Cokenach Property Limited | Barkway | 2014 |
| Coker Holdings Limited | Taunton | 2017 |
| Coker Thomas Holdings Ltd | Neath | 2026 |
| COL Limited | Portsmouth | 2026 |
| Col-Tec (Holdings) Ltd | Bournemouth | 2019 |
| Cola Group Midco Limited | London | 2024 |
| Cola Holdings Group Limited | London | 2018 |
| Cola Midco Limited | London | 2023 |
| Colab Venture Studio Ltd | London | 2023 |
| Colabella Limited | Gloucester | 2020 |
| Colaco Ltd. | London | 2017 |
| Colbert Group Ltd | Upminster | 2023 |
| Colbourne Properties Limited | London | 1951 |
| Colbre Holdings Limited | Rossendale | 2023 |
| Colbren Investments Limited | Edinburgh | 2022 |
| Colbret Limited | Worthing | 2023 |
| Colbridge Atlas Limited | Ferndown | 2026 |
| Colbridge Investments Ltd | London | 2025 |
| Colbro Construction Company Limited | Doncaster | 2022 |
| Colburt Marine Group Limited | Brighton | 2016 |
| Colby Capital Management Limited | Ingatestone | 2026 |
| Colby Capital Partners Limited | Ingatestone | 2026 |
| Colby Holdings Limited | Northampton | 2022 |
| Colby Property Investments Ltd | Eastbourne | 2022 |
| Colby River Capital Management Limited | London | 2025 |
| Colby River Limited | London | 2025 |
| Colby Strategies Limited | London | 2016 |
| Colc Finance PLC | London | 2019 |
| Colcap Financial Overseas Holdings Limited | London | 2022 |
| Colcap Financial UK Limited | London | 2022 |
| Colchester Financial Planning Ltd | Malpas | 2024 |
| Colchester Global Investors Limited | London | 1999 |
| Colchester Mortgage Solutions Ltd | Colchester | 2021 |
| Colchester Mortgages Limited | Colchester | 2024 |
| Colchian Capital Limited | London | 2015 |
| Colchour Limited | Leeds | 2017 |
| Colco Holdings Limited | Sevenoaks | 1963 |
| Colcom International Ltd | Cardiff | 2020 |
| Colcombe Capital Group Ltd | Tonypandy | 2025 |
| Cold Banana Holdings Limited | Bournemouth | 2020 |
| Cold Fell Group Limited | Carlisle | 2008 |
| Cold Mountain Limited | Rugby | 2019 |
| Cold Sky Limited | Tenby | 2013 |
| Cold Spring Management Limited | London | 2025 |
| Cold Stores Holdings Limited | Northampton | 2019 |
| Cold UP North Ltd | Scarborough | 2023 |
| Coldcare Global Ltd | London | 2023 |
| Coldharbour Technology Limited | Leicester | 2017 |
| Coldpiece Limited | Guildford | 2018 |
| Coldpiece Two Ltd | Guildford | 2021 |
| Coldrey & Bryant Consultants Ltd | Bury St. Edmunds | 2002 |
| Coldrum Holdings Ltd | Enniskillen | 2021 |
| Coldshield Capital Limited | London | 2025 |
| Coldspark Limited | London | 2014 |
| Coldspring Estates Limited | | 2005 |
| Coldspring Investments Limited | | 2006 |
| Coldstar (UK) Holdings Ltd | Bristol | 2019 |
| Coldstore Investments Ltd | Derby | 2022 |
| Coldstream Commercial Brokers Ltd | Cramlington | 2019 |
| Coldunell Finance Limited | Esher | 2016 |
| Cole & Daughters Holdings Limited | Manchester | 2023 |
| Cole & Saunders Limited | Dudley | 2005 |
| Cole Actuarial Limited | Sandbach | 2022 |
| Cole Brothers Holdings Limited | London | 2021 |
| Cole Construction Group Ltd | Newry | 2022 |
| Cole Digital Ltd | Whalley | 2023 |
| Cole Family Ltd | Brentwood | 2018 |
| Cole Financial Associates Limited | Worthing | 2018 |
| Cole Gunning Financial Advice Ltd | Westbury | 2025 |
| Cole Henry PE 2 Limited | London | 2014 |
| Cole Pendrey Investments Ltd | Milton Keynes | 2022 |
| Cole Valley Consultants Limited | Birmingham | 2020 |
| Cole Ventures Limited | London | 2020 |
| Colebrooke Capital Management Ltd | London | 2024 |
| Colebrooke Partners IM Limited | London | 2022 |
| Colebrooke Partners Limited | London | 2017 |
| Coleby Holdings Unlimited | Grimsby | 2016 |
| Colecraft Holdings Limited | Southam | 2025 |
| Coledale Property Holdings Limited | Penrith | 2022 |
| Coleebri Limited | London | 2024 |
| Colegrove Properties Limited | Oxford | 2017 |
| Coleman & James (Holdings) Limited | Rochester | 1994 |
| Coleman FOX Limited | Bournemouth | 2022 |
| Coleman FS Limited | Market Harborough | 2023 |
| Colendi Holdings Limited | London | 2021 |
| Colendi Setl Nominees Limited | Radlett | 2022 |
| Colenko Capital Ltd | London | 2018 |
| Colenko Holdings Ltd | London | 2019 |
| Colenko Ltd | London | 2018 |
| Colenko Secured Investments 1 Ltd | London | 2022 |