| Commercial Clay Limited | Stoke On Trent | 1982 |
| Commercial Dishwasher Repairs Ltd | Littlehampton | 2016 |
| Commercial Dishwasher Services Limited | Fleet | 1997 |
| Commercial Dishwasher Solutions Limited | Chesterfield | 2010 |
| Commercial Diving Technical Services Ltd | Leicester | 2024 |
| Commercial Door Maintenance and Security Ltd | Kington | 2023 |
| Commercial Electronics Company Limited | London | 2013 |
| Commercial Equipment Services Limited | Worcester | 1999 |
| Commercial Fabrications Limited | Wellesbourne | 2010 |
| Commercial Fire Safety Ltd | Stockport | 2009 |
| Commercial Fishing Supplies Ltd | Clacton On Sea | 2016 |
| Commercial Foods Limited | Bristol | 2015 |
| Commercial Forms Limited | Farnham | 1990 |
| Commercial Foundations CIC | Cheltenham | 2015 |
| Commercial Furniture Company (UK) Limited | Nottingham | 2025 |
| Commercial GAS Catering Limited | Doncaster | 2013 |
| Commercial GAS Service Limited | Iron Acton | 2014 |
| Commercial Glass Specialists Limited | Barnsley | 2026 |
| Commercial Glass Systems Limited | Castleford | 2023 |
| Commercial Heating Services (Bridgnorth) Ltd | Bridgnorth | 2015 |
| Commercial Heating Services Limited | Bridgnorth | 2023 |
| Commercial Heating Specialists Ltd | Lisburn | 2015 |
| Commercial Heavy Repairs Ltd | London | 2026 |
| Commercial Industrial Consctruction UK Limited | Swindon | 2017 |
| Commercial Industrial Heat Limited | London | 1993 |
| Commercial Installations and Solutions Limited | Newport | 2014 |
| Commercial Interior Blinds Ltd | Ruislip | 2022 |
| Commercial Interiors Direct Limited | Castleford | 2025 |
| Commercial Kitchen Breakdowns Ltd | Stamford | 2022 |
| Commercial Kitchen Catering Solutions Ltd | Dudley | 2025 |
| Commercial Kitchen Cleaning Ltd | Bourne | 2015 |
| Commercial Kitchen Engineers Limited | Shoreham-By-Sea | 2014 |
| Commercial Kitchen Fabrication Ltd | Manchester | 2022 |
| Commercial Kitchen KIT Engineers Ltd | London | 2019 |
| Commercial Kitchen Services (SW) Ltd | Poole | 2014 |
| Commercial Kitchen Specialists Limited | Bangor | 2011 |
| Commercial Laundry & Electrical Services Limited | Southampton | 2021 |
| Commercial Laundry and Catering Services Ltd | Blackburn | 2019 |
| Commercial Laundry Equipment Services Limited | Southampton | 2005 |
| Commercial Laundry Rental Ltd | Sheffield | 2022 |
| Commercial Lighting Systems Ltd. | Swanwick, Hampshire | 1991 |
| Commercial Lines Limited | Leeds | 1983 |
| Commercial Machinery Auctions Ltd | Wellington | 2023 |
| Commercial Panels and Pressings Ltd. | Northampton | 2015 |
| Commercial Plumbing Supplies Ltd | Ravensthorpe | 2013 |
| Commercial Polished Concrete Floors Ltd | Stroud | 2019 |
| Commercial Print Solutions Limited | Belfast | 2013 |
| Commercial Print Wales Ltd | Bridgend | 2012 |
| Commercial Printers (Portsmouth) Limited | Shedfield | 1962 |
| Commercial PSV Limited | Rochford | 2003 |
| Commercial Refrigeration Services Ltd | Dunfermline | 2009 |
| Commercial Repairs & Sales (CRS) Ltd | Fivemiletown | 2026 |
| Commercial Seating Company Limited | Erith | 2009 |
| Commercial Services (Armagh) Limited | Armagh | 2011 |
| Commercial Services Limited | Southend-On-Sea | 2003 |
| Commercial Signage Solutions Limited | Leeds | 2015 |
| Commercial Signs Limited | Peterborough | 2013 |
| Commercial Support Limited | Widnes | 2009 |
| Commercial Systems International Limited | Leeds | 1986 |
| Commercial Tiling Limited | Birmingham | 2026 |
| Commercial TL Ltd | Sutton Coldfield | 2021 |
| Commercial Trading Pallets Limited | Bristol | 2009 |
| Commercial Transmission Services Ltd. | Glasgow | 1984 |
| Commercial Tyres Ltd | Manchester | 2017 |
| Commercial Vehicle Bodies (Northampton) Limited | Northampton | 2019 |
| Commercial Vehicle Conversions UK Ltd | King'S Lynn | 2023 |
| Commercial Vehicle Fleet Support Ltd | St. Ives | 2023 |
| Commercial Vehicle Linings Limited | Craven Arms | 2002 |
| Commercial Vehicle Parts Direct Ltd | Kingswinford | 2017 |
| Commercial Vehicle Plylining Services Ltd | Stonehouse | 2013 |
| Commercial Vehicle Repairs (Llanelli) Ltd | Kidwelly | 2021 |
| Commercial Vehicle Specialists Limited | Doncaster | 2015 |
| Commercial Ventilation Services Ltd | Dudley | 2010 |
| Commercial-Tech Ltd | Scunthorpe | 2025 |
| Commeroot Limited | West Midlands, England | 2025 |
| Commic International Ltd | Accrington | 2010 |
| Commission Grove Ltd | Peterborough | 2021 |
| Commissionaire Garage Doors Limited | Ipswich | 2009 |
| Commodities & Textiles Ltd | Leicester | 2011 |
| Commodities Partners Trade Services Limited | London | 2005 |
| Commodity Trade Partners Ltd | Coventry | 2014 |
| Commodity Trading Desk UK Ltd | Preston | 2023 |
| Commodore Kitchens Limited | Grays | 1979 |
| Common Equipment Ltd | London | 2026 |
| Common Goods Group Limited | London | 2018 |
| Common People Coffee Limited | Newry | 2023 |
| Common Rioters Beer Limited | London | 2018 |
| Common Sanity Ltd | London | 2020 |
| Common Scents Fragrances Ltd | Newbury | 2026 |
| Common Sense Candles Limited | Hindhead | 2026 |
| Common Space Fitters Ltd | Kington | 2025 |
| Common Youth Clothing Ltd | Glasgow | 2019 |
| Commonfield Services Limited | Newton Abbot | 1995 |
| Commonground Coventry C.I.C. | Sheffield | 2018 |
| Commonroom London Limited | London | 2012 |
| Commons Bakehouse Ltd | London | 2024 |
| Commontech Limited | London | 2023 |
| Comms Glue Limited | Torpoint | 2016 |
| Commtec Services Ltd | Derry | 2020 |
| Commtech IT Solutions Limited | Coventry | 2004 |