| Commtel Innovate Limited | Corby | 2011 |
| Commtel Limited | Crawley | 1992 |
| Commulite EVO Ltd | Hornchurch | 2024 |
| Commulite Limited | Hornchurch | 2009 |
| Communal Maintenance Limited | Manchester | 2025 |
| Communicake Ltd. | London | 2024 |
| Communicated Ltd | Edinburgh | 2022 |
| Communication Technical Services Limited | Eastleigh | 1965 |
| Communications Audit UK Limited | Cheltenham | 1985 |
| Communications Trade Supplies Manufacturing Limited | Peterborough | 1993 |
| Communisis PS Limited | London | 2021 |
| Communitee Ltd | Maidstone | 2015 |
| Community Appeal Media Limited | Lancing | 2004 |
| Community Arts Rhayader and District | Powys | 1998 |
| Community Clothing (Lancashire) Ltd | Blackburn | 2022 |
| Community Communication Limited | Bedale | 2004 |
| Community Cycle Centre CIC | Southsea | 2013 |
| Community Meals on Wheels Ltd | Port Talbot | 2020 |
| Community Plus Media Ltd | Fleetwood | 2025 |
| Community Products (UK) Limited | Robertsbridge | 1998 |
| Community Sounds and Stories CIC | Leicester | 2022 |
| Community Update Limited | Halesowen | 2010 |
| Community Window and Door Repairs Limited | Broadstairs | 2014 |
| Commutaports Limited | Glasgow | 1988 |
| Commutator Technologies Ltd. | Kent | 1993 |
| Como Products Limited | Danbury | 2012 |
| Como Restaurants Ltd | Hove | 2025 |
| Comodo Living Ltd | Wakefield | 2023 |
| Comodo Workwear Ltd | Basildon | 2020 |
| Comp Contracts Limited | Leamington Spa | 2025 |
| Comp Room Media Ltd | Aylesbury | 2002 |
| Compaas Ltd | Dartford | 2019 |
| Compac Fluid Power Limited | Cotebrook Tarporley | 1989 |
| Compack Limited | Port Glasgow | 1982 |
| Compact Camper Conversions Limited | York | 1999 |
| Compact Cryogenics Ltd. | London | 2017 |
| Compact Electronics Ltd | Bicester | 2016 |
| Compact Engineering Limited | Thirsk | 1986 |
| Compact Garage Doors Ltd | Tadley | 2021 |
| Compact High Speed Ltd | Basingstoke | 2023 |
| Compact Instruments Limited | Bolton | 2003 |
| Compact Interiors Limited | Bromley | 2014 |
| Compact Joinery Limited | Greenford | 2020 |
| Compact Kitchens Ltd | Paisley | 2025 |
| Compact Manufacturing Limited | Bromsgrove | 2003 |
| Compact Orbital Gears Limited | Birmingham | 2001 |
| Compact Rails & Systems Limited | Redruth | 2013 |
| Compact Science Systems Limited | Newcastle Under Lyme | 2005 |
| Compact Screens Ltd | Dungannon | 2018 |
| Compact Storage Limited | Colchester | 1995 |
| Compact Storage Products Limited | Colchester | 1996 |
| Compact Storage Systems Limited | Colchester | 1996 |
| Compact Vending Machine Ltd | London | 2023 |
| Compactcaddy Ltd | Lancashire | 1998 |
| Compactor Services (Northern) Limited | Wallasey | 2010 |
| Compactors Direct Servicing Limited | Chorley | 1998 |
| Compak Ramps Limited | Dartford | 2002 |
| Companio Ltd | Hinckley | 2019 |
| Companions Pet Food Limited | Tipton | 2023 |
| Company 53327 Limited | | 1897 |
| Company Cards Limited | St Helens | 2005 |
| Company FORTY4 Ltd | London | 2016 |
| Company of Dark Spirits Limited | Edinburgh | 2017 |
| Company Solutions (UK) Limited | Bishop Auckland | 2002 |
| Company Stationers Limited | Eastbourne | 1990 |
| Company Trade Global Energy Ltd | London | 2021 |
| Comparini Developments Limited | London | 2013 |
| Compart Services Ltd | Worthing | 2021 |
| Compass Access Limited | Northwood Hills | 2019 |
| Compass Box Delicious Whisky Ltd. | Edinburgh | 2000 |
| Compass Box Whisky Supply Ltd | Richmond | 2012 |
| Compass Brewery Limited | London | 2011 |
| Compass Camper Conversions Ltd | Merthyr Tydfil | 2020 |
| Compass Clothing Limited | Dorking | 2024 |
| Compass Concrete Ltd | Spalding | 2026 |
| Compass Engineering Limited | Barnsley | 1989 |
| Compass Fire Protection Limited | Broxbourne | 2015 |
| Compass Group (East Midlands) Ltd | Nottingham | 2023 |
| Compass Heating Installations Limited | Ipswich | 2001 |
| Compass Heating Scotland Limited | Kingseat | 2017 |
| Compass Industrial Supply Chain Ltd. | Cambridge | 2024 |
| Compass Inflatables Limited | Emsworth | 2004 |
| Compass Interiors (S W) Limited | Torquay | 2005 |
| Compass International Trading Limited | Swansea | 1992 |
| Compass Life Limited | London | 2025 |
| Compass Marine Services & Repairs Limited | Portsmouth | 2017 |
| Compass Marine Surveys Ltd | Yelverton | 2022 |
| Compass MK Limited | Reading | 2018 |
| Compass Mouldings Ltd | Bodiam | 2021 |
| Compass North Holdings Limited | Cardiff | 2021 |
| Compass Optics Limited | London | 2016 |
| Compass Partitions Limited | Wirral | 2020 |
| Compass Point One Ltd | Poole | 2024 |
| Compass Print Group Limited | Aberdeen | 2015 |
| Compass Print Holdings Limited | Aberdeen | 2007 |
| Compass Printing & Packaging Limited | Bolton | 2002 |
| Compass Protection Manufacturing Ltd | Brierley Hill | 2018 |
| Compass Rigging Ltd | Woodbridge | 2025 |
| Compass Scratch Removal Ltd | Hazlemere | 2020 |
| Compass Tenders Ltd | Hamble | 2007 |