| Colchester Machine Tool Solutions Ltd | Elland | 1916 |
| Colchester Mobile Generator Solutions Limited | Colchester | 2021 |
| Colchester Press Limited | Essex | 2002 |
| Colchester Racing Developments Ltd | Manningtree | 2013 |
| Colchester Rewinds and Repairs Limited | Colchester | 1977 |
| Colchester Rewinds Plant and Engineering Limited | Colchester | 1980 |
| Colchester Windows & Plastic Suppliers Limited | Colchester | 2013 |
| Colchoes & Companhia Limited | London | 2001 |
| Colco Coffee Ltd | Windsor | 2020 |
| Colcort Jewellery Ltd | Leighton Buzzard | 2013 |
| Colcrete Limited | Dinnington | 2020 |
| Cold Air Solutions Limited | Holmfirth | 2005 |
| Cold and Hot Commercial Kitchen Equipments Services Ltd | London | 2025 |
| Cold Bath Brewing Company Limited | Harrogate | 2017 |
| Cold Brew Coffee Co Ltd | Mitcham | 2023 |
| Cold Built Ltd | St. Albans | 2025 |
| Cold Case Limited | Ashford | 2010 |
| Cold Chain Solutions Limited | Chelmsford | 2023 |
| Cold Chain Technologies Ltd | Birmingham | 2020 |
| Cold Change Group Limited | Liverpool | 2024 |
| Cold Coffee Retail Ltd | Southampton | 2018 |
| Cold Cure Windows Limited | Aylesbury | 1998 |
| Cold Degree Solutions Ltd | London | 2024 |
| Cold END Services Ltd | Doncaster | 2005 |
| Cold Formed Products Limited | London | 1956 |
| Cold Formed UK Ltd | Maidenhead | 2023 |
| Cold Link Limited | Huntingdon | 1996 |
| Cold Mirror Ltd | Kettering | 2025 |
| Cold Move Limited | Oswestry | 1996 |
| Cold Plus Group Ltd | Wembley | 2024 |
| Cold Plus Limited | Belfast | 2023 |
| Cold Pro International Ltd | London | 2023 |
| Cold Roll (Rings) Ltd | Manchester | 2009 |
| Cold Room Network Ltd | Chelmsford | 2025 |
| Cold Shelter Ltd | Cwmbran | 2023 |
| Cold Skill Limited | Harlow | 2019 |
| Cold Snap Limited | Hersham | 2004 |
| Cold Space (Lincs) Ltd | Barton-Upon-Humber | 2023 |
| Cold Spring Gardens Limited | Leeds | 2019 |
| Cold Tech (Services) Ltd | Bristol | 2012 |
| Cold World Ltd | Manchester | 2023 |
| Coldavian Ltd | Ipswich | 2006 |
| Coldblow Coffee Company Limited | Tenterden | 2017 |
| Coldcare Global UK Limited | London | 2026 |
| Coldcare Ltd | Tamworth | 2024 |
| Coldcontrol Services Limited | Alresford | 1989 |
| Coldcurve Limited | Inverness | 2007 |
| Coldene Castors Limited | Aylesbury | 2005 |
| Colder Refrigeration Ltd | Melksham | 2023 |
| Coldeye Ltd | Pershore | 2024 |
| Coldface Refrigeration Limited | Bromley | 2015 |
| Coldforms Jewellery Ltd | Exeter | 2024 |
| Coldframe Brewery Ltd | St Austell | 2025 |
| Coldframe Grow Systems Limited | North Walsham | 2025 |
| Coldharbour Art Ltd | Bristol | 2019 |
| Coldharbour Lights Ltd | London | 2021 |
| Coldhold Systems Limited | Cheshire | 1994 |
| Coldpoint Limited | 24 Lammas Street Carmarthen | 2003 |
| Coldpress Foods Limited | London | 2011 |
| Coldpress GB Limited | Winchester | 2025 |
| Coldridge Consultancy Limited | Wembley | 2010 |
| Coldroom Contractors Ltd | Woking | 2022 |
| Coldroomsdirect Ltd | Waltham Abbey | 2024 |
| Coldsaver (Selby) Limited | Warrington | 1998 |
| Coldsaver Panels Limited | Warrington | 2009 |
| Coldside Engineering Ltd | Buckingham | 2022 |
| Coldsmiths Limited | Basingstoke | 2023 |
| Coldsmoking Limited | Milton Keynes | 2013 |
| Coldstar Refrigeration Ltd | Grimsby | 2012 |
| Coldsteam GIN Limited | Isleworth | 2022 |
| Coldstore Engineers Ltd | Bradford | 2020 |
| Coldstream (Engineering) Limited | Haywards Heath | 2018 |
| Coldstream Coldrooms - Garden Offices Ltd | Gosport | 2010 |
| Coldtech Ltd | London | 2026 |
| Coldtherm Limited | Huddersfield | 2014 |
| Coldways Refrigeration Ltd | Southport | 2024 |
| Coldwell Ltd | London | 2011 |
| Coldwells Build Limited | Alford | 2016 |
| Coldwinter Limited | Weston-Super-Mare | 2011 |
| Cole & Hough Ltd | Woodhall Spa | 2025 |
| Cole & Wilson,Limited | Bradford | 1927 |
| Cole and Cade Ltd. | Milton Keynes | 2024 |
| Cole Cookers Ltd | Costessey | 2021 |
| Cole Electric Limited | London | 2017 |
| Cole Fabrics PLC | West Bridgford | 1987 |
| Cole Ironcraft Limited | Canterbury | 1962 |
| Cole Mechanical Services Limited | Chesham | 1977 |
| Cole Metal Products Limited | Merseyside | 1978 |
| Cole Network Solutions Limited | Sandbach | 2011 |
| Cole Renewables Limited | Llandudno | 2024 |
| Cole Sheet Metal Limited | Chandlers Ford | 2013 |
| Cole Todd Fabrication Ltd | York | 2025 |
| Cole's GIN Ltd | Newport | 2020 |
| Cole's Kitchen Limited | Porth | 2020 |
| Cole's Puddings Ltd. | Tiptree | 1987 |
| Cole-Parmer Limited | Altrincham | 2007 |
| Coleandparsonage Ltd | Ludlow | 2011 |
| Coleborn Marine and Aerospace Ltd | Lee-On-The-Solent | 2025 |
| Colebrook Bosson & Saunders (Products) Limited | Melksham | 1990 |
| Coleburn Distillery Limited | Livingston | 2014 |