| Clyde Bergemann Power Group International Limited | Glasgow | 1998 |
| Clyde Blowers Group Limited | Glasgow | 1995 |
| Clyde Brokers Limited | Glasgow | 2012 |
| Clyde Financial Ltd | Hamilton | 2023 |
| Clyde Financial Services Limited | Glasgow | 2008 |
| Clyde Health Ltd | East Kilbride | 2024 |
| Clyde Importers Holdings Limited | Glasgow | 2007 |
| Clyde Invest Limited | Greenock | 2025 |
| Clyde Link Holdings Limited | East Lothian | 2018 |
| Clyde Marina Holdings Limited | Ardrossan | 2020 |
| Clyde SPV Limited | Swanley | 2017 |
| Clyde UK Holdings Ltd | Glasgow | 2026 |
| Clyde Union (Holdings) Limited | Glasgow | 2007 |
| Clyde Union (Indonesia) (Holdings) Limited | Cathcart | 2011 |
| Clyde Union China Holdings Limited | Glasgow | 2007 |
| Clyde Ventures Limited | Glasgow | 2022 |
| Clydebank Municipal Bank Limited | Clydebank | 1921 |
| Clydebase Limited | Glasgow | 2026 |
| Clydeborn Limited | Chepstow | 2014 |
| Clydebuilt HI Group Ltd | Glasgow | 2023 |
| Clydegrove Accountants (Glasgow) Ltd | Glasgow | 2019 |
| Clydegrove Accountants (Manchester) Ltd | Manchester | 2019 |
| Clydegrove Financial Consultants Ltd. | Edinburgh | 2001 |
| Clydesdale Bank PLC | Glasgow | 1882 |
| Clydesdale Financial Services Limited | | 1994 |
| Clydesdale Holdings Ltd | Cradley Heath | 2023 |
| Clydevalley Financial Solutions Limited | Wishaw | 2008 |
| Clydrock Limited | | 1981 |
| Clyduff Investments Limited | Matfield | 2022 |
| Clymps Ltd | Billingham | 2024 |
| Clyne Associates Ltd | London | 2021 |
| Clyne Communications Limited | Ruislip | 2002 |
| Clynton Partners Ltd | Folkestone | 2024 |
| CM 2019 (UK) Limited | London | 2019 |
| CM 2478 Limited | London | 2023 |
| CM Adjusters Ltd | Cardiff | 2016 |
| CM Advisory American Ltd | Lancing | 2021 |
| CM Advisory American Partners Ltd | Lancing | 2021 |
| CM Advisory Cement Partners Ltd | Lancing | 2022 |
| CM Advisory Investments Ltd | Lancing | 2021 |
| CM Advisory Services Ltd | Chatham | 2017 |
| CM Asset Management Ltd | Birmingham | 2026 |
| CM Assets Holding Limited | Bradford | 2025 |
| CM Behr Ltd | London | 2024 |
| CM Bidco Limited | London | 2022 |
| CM Brewery Holdings Limited | Wolverhampton | 2017 |
| CM Brown Holding Limited | Gravesend | 2025 |
| CM Corporate Limited | Liverpool | 2014 |
| CM Crypto Mining Ltd | Bolton | 2021 |
| CM Ellis Holdings Limited | Morecambe | 2025 |
| CM Enforcement Ltd | Mitcham | 2018 |
| CM Finance Limited | Windsor | 2021 |
| CM Frazer Limited | Derby | 2024 |
| CM Funding 6 Ltd | London | 2026 |
| CM Green 1981 Limited | Leeds | 2019 |
| CM Greenwood & Sons Property Investment Ltd | Nelson | 2021 |
| CM Group Investment Limited | London | 2019 |
| CM Group Properties Limited | Liverpool | 2009 |
| CM Holdings Group Limited | Halifax | 2022 |
| CM Hospitality Holdings Ltd | Manchester | 2024 |
| CM International Properties Ltd | London | 2023 |
| CM Investment Holdings Ltd | Cheddar | 2025 |
| CM Investors Limited | London | 2020 |
| CM Lifecycle Finance Ltd | Hitchin | 2019 |
| CM Machines Ltd | Lincoln | 2023 |
| CM Northern Heights Limited | Harrow | 2014 |
| CM Paddocks Holdings Limited | Barnet | 2019 |
| CM Pension Administrators Ltd | High Wycombe | 2014 |
| CM Pensions Limited | Birmingham | 2013 |
| CM Private Holdings Ltd | London | 2024 |
| CM Strategic 613 Limited | Brentwood | 2021 |
| CM Suffolk Holdings Limited | Sevenoaks | 2019 |
| CM Thirteen Limited | London | 2026 |
| Cm&F Invest Ltd | London | 2014 |
| CM26 Properties Limited | Skelmersdale | 2026 |
| CM95 Limited | Swansea | 2021 |
| CMA CGM International Holdings UK Limited | Liverpool | 2003 |
| CMA Holdings (Northants) Ltd | Winslow | 2020 |
| CMA Investments Ltd | Harrogate | 2019 |
| CMA Mortgage Brokers Ltd | Weston-Super-Mare | 2024 |
| CMA Recruitment Group Limited | Hampshire | 2019 |
| Cmab Holding Ltd | London | 2024 |
| Cmac Protection Ltd | Guildford | 2020 |
| Cmag International Limited | Huddersfield | 2020 |
| Cmag Limited | Enniskillen | 2023 |
| Cmagic CIC | Liverpool | 2023 |
| Cmal Limited | Dundee | 2006 |
| Cman Financial Services Limited | Luton | 2019 |
| Cman Markets Ltd | Luton | 2018 |
| Cmav Limited | Liverpool | 2014 |
| CMB Consult Ltd | Harlow | 2017 |
| CMB Global Investment Ltd | London | 2024 |
| CMB Healthcare Holdings Ltd | Nottingham | 2021 |
| CMB Mortgage Consultants Limited | Plymouth | 2006 |
| CMB Partners UK Ltd | London | 2011 |
| Cmbo Holdings Limited | Swanley Village | 2017 |
| Cmbt Group Ltd | Wilden | 2022 |
| Cmbw Holdings Limited | Poole | 2025 |
| CMC (2021) Ltd | Glasgow | 2021 |
| CMC Advice Ltd | Craigavon | 2026 |