| Core Fitness Ards Limited | Newtownards | 2022 |
| Core Fitness Bootcamp EK Limited | Glasgow | 2015 |
| Core Fitness Solutions Limited | Sheffield | 2015 |
| Core Flex Pilates Ltd | London | 2018 |
| Core Focus Pilates Ltd | Newry | 2026 |
| Core Games Ltd | Bognor Regis | 2026 |
| Core Gym Ltd | Carlisle | 2014 |
| Core Gym N.I. Limited | Coleraine | 2014 |
| Core Gym Oswestry Limited | Oswestry | 2025 |
| Core Gym Training Limited | Northwood | 2020 |
| Core Harmony Ltd | Harrow | 2026 |
| Core Health and Fitness Limited | Buckhurst Hill | 2002 |
| Core HQ CIC | Peterhead | 2026 |
| Core Kinetics (EM) Limited | Saffron Walden | 2016 |
| Core Mgmt Ltd | London | 2013 |
| Core Muscle Ltd | Plymouth | 2025 |
| Core Music Community Interest Company | Hexham | 2007 |
| Core Nutrition & Fitness Ltd | Turriff | 2021 |
| Core Offroad Events Ltd | Ottery St Mary | 2015 |
| Core Penarth Ltd | London | 2025 |
| Core Performance Ltd. | Bedford | 2013 |
| Core Performance Memberships Limited | Bedford | 2014 |
| Core Personal Training Studio Limited | Ashford | 2020 |
| Core Pilate Glasgow Ltd | Glasgow | 2025 |
| Core Pilates (UK) Ltd | Radstock | 2013 |
| Core Pilates Studios Ltd | London | 2014 |
| Core Pole and Chair Dance Co Ltd | Coventry | 2026 |
| Core Quest Studio Ltd | London | 2023 |
| Core Recovery Ltd | Burry Port | 2025 |
| Core Reformer Pilates Limited | Hinckley | 2023 |
| Core Reformer Pilates Sedgefield Ltd | Stockton-On-Tees | 2025 |
| Core Reformer Training Academy Ltd | Gravesend | 2025 |
| Core Results Limited | Chichester | 2010 |
| Core Shift Ltd | Falkirk | 2025 |
| Core Soundsystem Ltd | London | 2023 |
| Core Studio Essex Limited | Benfleet | 2026 |
| Core Studio Gym Ltd | Dartford | 2021 |
| Core UK Production Services Ltd | Stoke-On-Trent | 2019 |
| Core Warwickshire Limited | Leamington Spa | 2019 |
| Core Wellness Studio Ltd | Faversham | 2025 |
| Core YOU Media Ltd | London | 2025 |
| Core Zone Limited | Adderbury, Banbury | 2021 |
| Core-Blimey London Limited | Thames | 2015 |
| CORE300 Limited | Tamworth | 2019 |
| CORE4 Balance Limited | London | 2025 |
| CORE4FOOTBALL Ltd | Blackpool | 2025 |
| CORE650 Ltd | Milton Keynes | 2018 |
| Coreaxis Ltd | Norwich | 2024 |
| Corebody Pilates Ltd | Norwich | 2024 |
| Corefituk Ltd | Sutton Coldfield | 2011 |
| Corelab Pilates Limited | London | 2022 |
| Coreplay Ltd | London | 2026 |
| Coreth Arts Limited | Gillingham | 2012 |
| Corey Baker Dance Limited | London | 2015 |
| Corey Jackson Sound Limited | Glasgow | 2026 |
| Coreyblimey Limited | Pontypridd | 2019 |
| Corgi Game Birmingham Limited | Coventry | 2025 |
| Corgos Limited | London | 2015 |
| Corico Limited | Hampton | 2019 |
| Corin Silva Limited | Warrington | 2023 |
| Corinium Gym Ventures 2 Limited | Coventry | 2015 |
| Corinium Gym Ventures 4 Limited | Coventry | 2017 |
| Corinium Gym Ventures Holdings Limited | Coventry | 2017 |
| Corinium Gym Ventures Limited | Coventry | 2014 |
| Corinium Livery Ltd | Cirencester | 2011 |
| Corinna Brown Ltd | London | 2025 |
| Corinne Lapierre Limited | Leeds | 2015 |
| Corinne Natel Art Limited | London | 2020 |
| Corinne O'Donnell Presentation Design Ltd | Ruislip | 2013 |
| Corinthian Clubs Limited | Glasgow | 2005 |
| Corinthian Football Club | Longfield | 2013 |
| Corinthian Sports Club Limited | Longfield | 1952 |
| Corinthian Sports Management Ltd | London | 2010 |
| Corinthian-Casuals Football Club Limited | Bury | 2019 |
| Coriolanus Films Limited | London | 2009 |
| Corka Ltd | Goole | 2025 |
| Corkey's Magic Show Ltd | Brandon | 2023 |
| Corkley Development Association | Tandragee | 2011 |
| Corkscrew Productions Ltd | York | 2023 |
| Corley Creative Ltd | Brighton | 2023 |
| Corley Media Ltd | Wednesbury | 2021 |
| Cormac Mccormack Bloodstock Limited | Fordham Ely | 1995 |
| Cormonachan Community Woodlands Ltd | Lochgoilhead | 2020 |
| Corn Exchange Sports Bar Ltd | Derby | 2018 |
| Corn Exchange Theatre Company | Stamford | 2001 |
| Corn Exchange Wallingford Ltd | Wallingford | 1976 |
| Corn Street Studio Limited | Petworth | 2021 |
| Cornall Music Limited | Potters Bar | 2012 |
| Cornelia Street Productions Limited | London | 2018 |
| Cornell Sailing Limited | Brockworth | 1987 |
| Corner Corner (BWG) Limited | London | 2022 |
| Corner Flag Management Limited | Holywood | 2003 |
| Corner Pocket Pool & Sports Bar Ltd | Glasgow | 2022 |
| CORNER6MUSIC Limited | Eastbourne | 2017 |
| Cornered Lifestyle Limited | St. Albans | 2026 |
| Cornershop Limited | London | 2003 |
| Cornerstone 414 Ltd | Southwark | 2026 |
| Cornerstone Entertainment Ltd. | Stroud | 2018 |
| Cornerstone Fitness Ltd | Long Eaton | 2026 |
| Cornerstone Music Management Ltd | Watford | 2025 |