| Colts Sports Academy Limited | Bournemouth | 2015 |
| Columba Ltd | London | 2025 |
| Columbia Road Gallery Ltd | London | 2005 |
| Columbo Music Limited | Leeds | 2023 |
| Colworth Road Venue Limited | Woodford Green | 2010 |
| Colwyn Bay Community HWB CIC | Colwyn Bay | 2024 |
| Colwyn Bay Football Club Limited | Llandudno Junction | 1996 |
| Colwyn Bay Rugby Football Club Limited | Colwyn Bay | 2016 |
| COM Events Limited | Manchester | 2022 |
| Coma Concert Productions Limited | London | 2024 |
| Coma Live Limited | Birmingham | 2025 |
| Coma Sound Ltd | Liverpool | 2015 |
| Comacooo Ltd | Tewkesbury | 2025 |
| Comaliveagency Limited | Birmingham | 2026 |
| Comando Gymnasium Limited | London | 2017 |
| Comann Eachdraidh Lios MOR | Oban | 2002 |
| Comb Cornwall Ltd | St. Agnes | 2022 |
| Combat 8 Limited | London | 2024 |
| Combat Academy (Franchising) Ltd | Doncaster | 2014 |
| Combat Academy (Rotherham) Ltd | Mexborough | 2020 |
| Combat Athletics Academy Ltd | Callington | 2024 |
| Combat Base Dewsbury Ltd | Wakefield | 2025 |
| Combat Central Ltd. | Helensburgh | 2017 |
| Combat Challenge Ltd | Bradford | 2015 |
| Combat Championship Wrestling Ltd | Exeter | 2023 |
| Combat Co. Ltd | Walton On Thames | 2023 |
| Combat Condition Ltd | Hove | 2020 |
| Combat Conditioning Ltd | Faversham | 2019 |
| Combat Events & Apparel Ltd | Barnsley | 2019 |
| Combat Fight Series Limited | Sidcup | 2019 |
| Combat Fitness by SAM MAC CIC | Camden | 2026 |
| Combat Fitness Games Limited | Colindale | 2018 |
| Combat Fitness Ltd | Watford | 2023 |
| Combat Gyms Inc Ltd | Gravesend | 2023 |
| Combat Hire Ltd | Bristol | 2025 |
| Combat Hub Ltd | Wolverhampton | 2023 |
| Combat KRU Ltd | London | 2024 |
| Combat LAB Limited | London | 2020 |
| Combat Laser Games Limited | Chatham | 2011 |
| Combat Paintball Limited | Ipswich | 2003 |
| Combat Performance Academy Whalley Ltd | Preston | 2021 |
| Combat Promotion Ltd | Maidstone | 2015 |
| Combat Rehab Ltd | Batley | 2025 |
| Combat Rock Limited | Bradwell, Braintree | 2010 |
| Combat South Limited | Portsmouth | 2002 |
| Combat Specialist Ltd | London | 2026 |
| Combat Splat Limited | Cirencester | 2008 |
| Combat Sports Academy Ltd | Gillingham | 2008 |
| Combat Sports Coach Academy Ltd | Bootle | 2019 |
| Combat Strong Ltd | Liverpool | 2022 |
| Combat Training Centre Limited | Treorchy | 2021 |
| Combat Warriors Gym Ltd | Bristol | 2020 |
| Combat Zone Events Limited | Gainsborough | 2018 |
| Combat Zone Willen Lake Ltd | Milton Keynes | 2025 |
| COMBAT96 Ltd | Hebburn | 2024 |
| Combaterra Limited | Ledbury | 2018 |
| Combe Down Stone Legacy Trust | Bath | 2012 |
| Combe GIG Club Ltd | Ilfracombe | 2015 |
| Combe Mill Society | Combe | 1999 |
| Combe Productions Limited | Abingdon | 2012 |
| Combined Caving and Diving Club Ltd | Enniskillen | 2025 |
| Comcor (Riviera) Ltd | Ashford | 2024 |
| Come & Play Education Ltd | Oakham | 2025 |
| Come 'N' Play Cafe Limited | Loughton | 2017 |
| Come BYE Festival Ltd | Bristol | 2021 |
| Come Dancing Limited | | 1997 |
| Come Find ME Ltd | Halstead | 2016 |
| Come Outside CIC | Leeds | 2024 |
| Come Thru Ltd | Atherstone | 2022 |
| Come Together People | London | 2012 |
| Come Vibes WID WE Ltd | Bedford | 2025 |
| Come What MAY Films Ltd | Banbury | 2022 |
| Comediasians Limited | London | 2023 |
| Comedy at Work Ltd | Kenilworth | 2019 |
| Comedy Bandits Ltd | Droitwich | 2025 |
| Comedy Beats Ltd | Reigate | 2015 |
| Comedy Boat Party Limited | Sidcup | 2019 |
| Comedy Classes 4 Kids CIC | London | 2021 |
| Comedy Club 4 Kids Limited | London | 2011 |
| Comedy Dining Ltd | Lytham St. Annes | 2017 |
| Comedy Dinner Experiences Ltd | London | 2024 |
| Comedy Drops Ltd | Rotherham | 2019 |
| Comedy Factory 3ARABI Ltd | London | 2024 |
| Comedy Freaks Ltd | London | 2024 |
| Comedy Futures Limited | London | 2026 |
| Comedy in the Clubhouse Ltd | Southend-On-Sea | 2025 |
| Comedy in Your EYE Ltd | London | 2022 |
| Comedy Kerfuffle Ltd | Fordingbridge | 2023 |
| Comedy Live Ltd | Liverpool | 2026 |
| Comedy Lounge Limited | Croydon | 2021 |
| Comedy Republic Ltd | Reading | 2026 |
| Comedy Store Limited(The) | Great Chesterford | 1984 |
| Comedy Store Players Limited(The) | Great Chesterford | 1986 |
| Comedy Support ACT UK Ltd | Newcastle Upon Tyne | 2014 |
| Comedy Ticket Limited | Leeds | 2022 |
| Comedy Tributes Ltd | Lytham St. Annes | 2021 |
| Comedy Under the Stars Limited | Waterlooville | 2021 |
| Comedy VS Climate Change Ltd | London | 2023 |
| Comedy Women in Print Limited | London | 2016 |
| Comedymania Productions Ltd | London | 2022 |