| C & H Precision Finishers Limited | Hinckley | 1994 |
| C & H Textile Menders Limited | Huddersfield | 2016 |
| C & H Wigs Ltd | London | 2026 |
| C & I Foods Limited | London | 2021 |
| C & I Threading Ltd | Leeds | 2019 |
| C & J Adams (Bristol) Ltd | Bristol | 2020 |
| C & J Barrett Ltd | Usk | 2010 |
| C & J Electrical Services Ltd | Hull | 2021 |
| C & J Harper Services Limited | Harrow | 2015 |
| C & J Harries North East Ltd | Newcastle Upon Tyne | 2025 |
| C & J Meats Limited | Armagh | 2001 |
| C & J Riddell Limited | Diss | 2005 |
| C & K Plant Hire Limited | Stone | 2014 |
| C & K Worm Castings Organic Liquid Fertilizer PVT Ltd. | Leicester | 2023 |
| C & L Covers Ltd | Wirral | 2016 |
| C & L Crystal Cleaning Limited | Basildon | 2009 |
| C & L E Attenborough Limited | Nottingham | 1999 |
| C & L Plant Repairs Ltd | Leigh | 2017 |
| C & L Ventilation Services Limited | Londonderry | 2020 |
| C & M (SW) Ltd | Cardiff | 2015 |
| C & M Auto Centre Ltd | Widnes | 2025 |
| C & M Automations Ltd | Ross-On-Wye | 2025 |
| C & M Contract Upholstery Ltd | Liverpool | 2022 |
| C & M Environmental Limited | Glasgow | 1972 |
| C & M Nicol Ltd. | Inverurie | 2000 |
| C & M Precision Limited | Maldon | 2000 |
| C & M Projects Limited | Dorking | 2004 |
| C & M Services (Stonehouse) Limited | Bridgend Stonehouse | 2003 |
| C & M Stone Limited | Knaresborough | 2024 |
| C & M Tractors Limited | Rutland | 1971 |
| C & M Ventures Limited | Birmingham | 2005 |
| C & N Caravan Services Limited | Montgomery | 2002 |
| C & N Door Services Ltd | Hull | 2012 |
| C & N Electrical Industries Limited | High Wycombe | 1958 |
| C & N Fabrications Limited | Peterborough | 2010 |
| C & O Aero Ltd | London | 2016 |
| C & O Engineering Ltd | Edinburgh | 2014 |
| C & O Milligan (N.I.) Limited | | 1998 |
| C & O Powder Coatings Limited | St Helens | 1985 |
| C & O Tractors Limited | Dorset | 1997 |
| C & P Blinds & Awnings Ltd | Haverfordwest | 2018 |
| C & P Fabrications Ltd | Loughborough | 2022 |
| C & P High Voltage Services Limited | Swansea | 2019 |
| C & P Metalwork Limited | Bideford | 1994 |
| C & P Security Products Limited | London | 2006 |
| C & P Tailors Limited | Wembley | 2012 |
| C & R Boiler Services Limited | Swindon | 2018 |
| C & R Carpentry & Construction Ltd | Dunstable | 2021 |
| C & R Corporations Ltd | Bury St. Edmunds | 2020 |
| C & R Fabrications Holdings Limited | Birmingham | 2021 |
| C & R Glass Polishing Ltd | Eastbourne | 2025 |
| C & R James Bakery Limited | Swansea | 2020 |
| C & R Kitchens Ltd | Aylesbury | 2015 |
| C & R Outdoor Lighting Limited | Hemel Hempstead | 1991 |
| C & R Trade Frames Limited | Camborne | 2010 |
| C & R Tucker Limited | Bristol | 2012 |
| C & R Walne (Engravers) Limited | Lancashire | 2003 |
| C & S Automatics Ltd | County Derry | 2007 |
| C & S Automation Limited | Halstead | 2004 |
| C & S Digital Limited | Ilford | 2000 |
| C & S Digital Print Limited | Ilford | 2025 |
| C & S Energee Ltd | Trowbridge | 2007 |
| C & S Footwear Adaptions Limited | Chesterfield | 2002 |
| C & S Interiors Ltd | London | 2003 |
| C & S Kitchens Limited | Ashford | 2000 |
| C & S Marine Limited | London | 2015 |
| C & S Meats Limited | Sturminster Newton | 2002 |
| C & S Network Ltd | Gloucester | 2022 |
| C & S Processing Limited | Surbiton | 2006 |
| C & S Productions Limited | London | 1996 |
| C & S Seating Limited | St Leonards-On-Sea | 2003 |
| C & S Trading (UK) Limited | Surrey | 2002 |
| C & T Harnesses Limited | Kennett | 1983 |
| C & T Locksmiths Limited | Sutton Coldfield | 2003 |
| C & T Matrix Limited | Knaresborough | 1994 |
| C & T Vulcanising Services Limited | Bristol | 2006 |
| C & W Berry Limited | Leyland Preston | 1979 |
| C & W Precision Components Ltd | Gloucester | 2010 |
| C & W Seals Limited | Littlehampton | 2004 |
| C 'N C Doors Limited | Stourbridge | 1991 |
| C - Gems Limited | Leicester | 2005 |
| C a Models Ltd. | Stirling | 1989 |
| C a Automation Limited | St. Ives | 2016 |
| C a Design & Print Limited | Ellesmere Port | 2000 |
| C a English Fibres & Yarns Limited | Cleckheaton | 2010 |
| C a Fabrications Limited | Bromsgrove | 2013 |
| C a Mackay Denture Mechanic Ltd | Cupar | 2026 |
| C a Miles Ltd | Hereford | 2013 |
| C a Munro Ltd | Invergordon | 2018 |
| C a Portsmouth Limited | Newcastle Upon Tyne | 2001 |
| C a Print & Stationers Limited | Ivybridge | 1997 |
| C a Servicing Ltd | North Shields | 2026 |
| C and C Baseline Architectural Limited | Wigan | 2009 |
| C and D Windows and Doors Ltd | Glasgow | 2016 |
| C and H Precision Measuring Systems Limited | Blackburn | 2002 |
| C and I Control Systems Limited | Hemel Hempstead | 2010 |
| C and M Mould Tools Limited | Verwood | 1990 |
| C and N Designs Ltd | Dartford | 2017 |
| C and S Equipment Limited | Leighton Buzzard | 1993 |
| C B Adhesives Limited | Sale | 2006 |