| Comet Garage Doors (UK) Ltd | Newcastle Upon Tyne | 2024 |
| Cometz Limited | Warwick | 2024 |
| Comex 2000 (UK) Limited | Derby | 1999 |
| Comex Catering Service Ltd | Sevenoaks | 2020 |
| Comfasleep Ltd | Hollinwood | 2019 |
| Comfg Limited | Wrexham | 1988 |
| Comfizone Ltd | Dungannon | 2005 |
| Comforest Ltd | West Yorkshire | 2020 |
| Comfort & Co Furnishings Ltd | Manchester | 2025 |
| Comfort & Co Interiors Ltd | Manchester | 2025 |
| Comfort & Joy Mini's Ltd | West Norwood | 2022 |
| Comfort & Rest Ltd Ltd | Belfast | 2023 |
| Comfort and Joy Caterers Ltd | London | 2022 |
| Comfort BED Ltd | Bradford | 1999 |
| Comfort Blinds Ltd | Nelson | 2012 |
| Comfort Cloud Ltd | Bradford | 2024 |
| Comfort Couch Limited | Oldham | 2026 |
| Comfort Crafted Ltd | Dewsbury | 2025 |
| Comfort Dreams Ltd | Batley | 2018 |
| Comfort Food Kitchen Ltd. | Welwyn Garden City | 2025 |
| Comfort Intuitive Ltd. | Ipswich | 2008 |
| Comfort Kingdom Ltd | Blackburn | 2020 |
| Comfort KIT Limited | Whitchurch | 2022 |
| Comfort Linen & Cotton Ltd | Nelson | 2019 |
| Comfort Lounge Ltd | Romford | 2025 |
| Comfort Quality Furniture Ltd | Dewsbury | 2023 |
| Comfort Services Engineers Limited | London | 2023 |
| Comfort Sitting Limited | Nelson | 2025 |
| Comfort Sleep (INT) Limited | Batley | 2019 |
| Comfort Sofa Design Limited | Blackburn | 2019 |
| Comfort Ventures Limited | Bexleyheath | 2007 |
| COMFORT24 Ltd | Cleckheaton | 2014 |
| Comfortex Limited | Oldham | 1997 |
| Comfortnoise Ltd | London | 2022 |
| Comfortshield Group UK Limited | Morden | 2020 |
| Comfortz Leisure Ltd | Chesterfield | 2013 |
| Comfur Sleep Beds Ltd | Dewsbury | 2020 |
| Comfy Chair Ltd | Dewsbury | 2024 |
| Comfy Concepts Ltd | Birmingham | 2024 |
| Comfy Craft Ltd | Batley | 2015 |
| Comfy Daily Essentials Ltd | Ipswich | 2025 |
| Comfy Deluxe Ltd | Dewsbury | 2016 |
| Comfy Denture Ltd | Basildon | 2013 |
| Comfy Dreams Limited | Dewsbury | 2019 |
| Comfy Mate Limited | Coventry | 2025 |
| Comfy Matts Ltd | Batley | 2025 |
| Comfy Nights Limited | Batley | 2015 |
| Comfy Products Limited | Aberdare | 2022 |
| Comfy Quilts Limited | Manchester | 1991 |
| Comfy Sofa Limited | Ilkley | 2011 |
| Comfycrete Limited | Norwich | 2013 |
| Comfysleep Limited | E. Sussex | 1990 |
| Comfytimez Ltd | Batley | 2026 |
| Comgas Ltd. | Currie | 2008 |
| Comgen Systems Limited | Uxbridge | 2015 |
| Comhardware Limited | Worcestershire | 2004 |
| Comid Engineering Limited | Oldham | 1982 |
| Comindustries Limited | London | 2020 |
| Comix Box Ltd | Brixham | 2023 |
| Comix Engineering Ltd | Leicester | 2026 |
| Coml Ltd | London | 2018 |
| Comlan Limited | Middlesex | 2004 |
| Comm-Ops Engineering Ltd | Runcorn | 2013 |
| Comm-Tek Plus Limited | Tuxford | 2025 |
| Comma Group Limited | Birmingham | 2026 |
| Commagility Limited | Northampton | 2006 |
| Command Print Ltd | Morpeth | 2015 |
| Command Z Ltd | Hornchurch | 2018 |
| Commander Controls Limited | Cotgrave | 1993 |
| Commando Camp Ltd | London | 2018 |
| Commando Locksmiths Ltd | Nottingham | 2024 |
| Commark Limited | Stoke-On-Trent | 2005 |
| Commend UK Limited | Stansted | 1997 |
| Commerce Road Ltd | Peterborough | 2022 |
| Commercial & Industrial Gauges Limited | Wrexham | 1998 |
| Commercial & Residential Aluminium Ltd | Cannock | 2019 |
| Commercial AL13 Ltd | Whitstable | 2016 |
| Commercial Aluminium Shop Fronts Ltd | Leicester | 2011 |
| Commercial and Academic Services Limited | Lansdown | 1992 |
| Commercial and Marine Comms (Bristol) Limited | London | 2017 |
| Commercial Appliance Limited | Ballymena | 2018 |
| Commercial Awnings Limited | Swindon | 2016 |
| Commercial Blinds Direct Ltd | Leeds | 2025 |
| Commercial Bodies Limited | Norwich | 2014 |
| Commercial Body Repairs Limited | North Somerset | 1993 |
| Commercial Body Solutions Limited | Birmingham | 2014 |
| Commercial Body Specialists Limited | Stoke On Trent | 2011 |
| Commercial Boiler Services Ltd | Kenilworth | 2012 |
| Commercial Brake Tech Ltd | Wigan | 2019 |
| Commercial Breakdown Services Limited | Newton-Le-Willows | 2019 |
| Commercial Cars (Europe) Limited | Accrington | 2014 |
| Commercial Case Supplies Limited | Bromsgrove | 1965 |
| Commercial Catering B'Ham Ltd | Birmingham | 2016 |
| Commercial Catering Engineers & Installations Ltd | Rhyl | 2021 |
| Commercial Catering Engineers Anglia Limited | Suton | 2020 |
| Commercial Catering Engineers Ltd | Rhyl | 2015 |
| Commercial Catering Equipment & Refrigeration Ltd | Basildon | 2024 |
| Commercial Catering Installations Ltd | Brentwood | 2020 |
| Commercial Catering Services Ltd | Wrotham Heath | 2022 |
| Commercial Charcoal UK Ltd | Ruislip | 2025 |