| CL Boxing Limited | Liverpool | 2022 |
| CL Creations and Maintenance Ltd | Warrington | 2024 |
| CL Danter Ltd | Gloucester | 2023 |
| CL Entertainment Ltd | London | 2023 |
| CL Event Management Ltd | Sevenoaks | 2022 |
| CL Events 2024 Ltd | Otley | 2024 |
| CL Events Ltd | Glasgow | 2018 |
| CL Fitness LAB Limited | London | 2023 |
| CL Music Ltd | Sale | 2020 |
| CL Nord Ltd | Cambridge | 2021 |
| CL Paints Ltd | London | 2025 |
| CL Performing Arts Ltd | Bromley | 2018 |
| CL Pictures Ltd | Stevenage | 2025 |
| CL Racing Ltd | Scarborough | 2023 |
| CL Rentals Ltd | Doncaster | 2013 |
| CL Skydive Ltd | St. Helens | 2020 |
| CL Sports and Activity Ltd | St Albans | 2017 |
| CL Stunts Ltd | Hornchurch | 2026 |
| Cl-Av Productions Limited | Southampton | 2025 |
| Cl-Zone Limited | Farnham | 2019 |
| Clachan Design Ltd | New Malden | 2014 |
| Clachers Limited | Manchester | 2024 |
| Clachnacuddin Football Club (1990) Limited | Inverness | 1990 |
| Clackmannanshire Heritage Trust | Alloa | 1988 |
| Clacks Active Limited | Dollar | 2012 |
| Clacton and District Indoor Bowls Club Limited | Clacton-On-Sea | 2005 |
| Clacton Golf Club Trading Limited | Clacton On Sea | 2016 |
| Clacton Kayak Rental Ltd | Clacton-On-Sea | 2020 |
| Clacton Pavilion Limited | London | 1992 |
| Clacton Regent Football Club Limited | Leigh-On-Sea | 2025 |
| Clacton Town Community Foundation | Clacton On Sea | 2026 |
| Clacton Town Football Club Ltd | London | 2026 |
| Clacton-On-Sea Bowling Club Limited | Clacton-On-Sea | 2019 |
| Claddagh Productions Ltd | Sevenoaks | 2020 |
| Claire Adams Total Health Ltd | Edinburgh | 2018 |
| Claire Anderton Limited | Borehamwood | 2022 |
| Claire Andrews Performance Academy Limited | Aylesbury | 2023 |
| Claire Asker Creative Limited | Stanford-Le-Hope | 2015 |
| Claire Baxter Ltd | Belfast | 2013 |
| Claire Booth Training Limited | Grimsby | 2021 |
| Claire Chambers Ltd | Crewe | 2021 |
| Claire Coles Ltd | Norwich | 2013 |
| Claire Cooper Design Ltd | London | 2019 |
| Claire Deacon Limited | London | 2019 |
| Claire Elizabeth Design Ltd | Macclesfield | 2022 |
| Claire Evans Limited | Esher | 2012 |
| Claire Fuller Writer Limited | Easton | 2014 |
| Claire Gevaux Creative Consulting Ltd | Brentwood | 2021 |
| Claire Gilbert Ltd | Chelmsford | 2020 |
| Claire Harrison Photography Ltd | New Malden | 2013 |
| Claire Henley Limited | Warwickshire | 2002 |
| Claire Ince Promotions Limited | Upminster | 2013 |
| Claire Jeffries Limited | Newcastle | 2011 |
| Claire Leigh Limited | Taunton | 2002 |
| Claire Luxton Art Ltd | London | 2023 |
| Claire Morgan Studio Ltd | Gateshead | 2013 |
| Claire Oliver Comedy Ltd | Leeds | 2026 |
| Claire Purcell Ltd | Hurley | 2026 |
| Claire Richards Limited | Saffron Walden | 2008 |
| Claire Scullion Limited | Paulerspury | 2023 |
| Claire Wood Photography Limited | Huddersfield | 2006 |
| Claire's Pilates Education Limited | York | 2023 |
| Claire's Pilates Studio Limited | York | 2025 |
| Claireart Ltd | Buckhurst Hill | 2019 |
| Claires Crafts Ltd | Alfreton | 2011 |
| Claire’S House Limited | Bury St Edmunds | 2023 |
| Clambers Limited | St Leonards On Sea | 2008 |
| Clampwing Limited | Ivybridge | 2025 |
| Clan Donnachaidh Society | Perthshire | 2004 |
| Clan Entertainment Limited | London | 2010 |
| Clan Events Ltd | Belfast | 2024 |
| Clan Munro Heritage Limited | Dingwall | 1995 |
| Clan Works Ceramics Limited | Beckenham | 2012 |
| Clanage Road Sports Club Limited | Bristol | 2013 |
| Clanbase Ltd | London | 2017 |
| Clancy Briggs Limited | London | 2019 |
| Clandeboye Ltd | Nottingham | 2019 |
| Clandon Regis Golf Club Limited | West Clandon | 1996 |
| Clanfield Cricket Club Limited | Waterlooville | 2023 |
| Clann and Co Community Ltd | Londonderry | 2026 |
| Clansman Engineering Ltd | London | 2018 |
| Clap City Records Limited | London | 2017 |
| Clap Hands Entertainment Ltd | London | 2025 |
| Clapham Common Fitness Ltd | London | 2026 |
| Clapham Cycle Limited | London | 2017 |
| Clapham Junction Fitness Limited | London | 2024 |
| Clapham Yoga Ltd | London | 2023 |
| Clapton Artist Studios CIC | London | 2023 |
| Clapton Stables Ltd | London | 2025 |
| Clara Arts Ltd | London | 2014 |
| Clara Batten Ltd | Sittingbourne | 2021 |
| Claragh Bridge Vintage Club | Castlewellan | 2007 |
| Clarasikm Limited | London | 2020 |
| Clarcol Ltd | London | 2025 |
| Clare Arts and Crafts Limited | Woodbridge | 2023 |
| Clare AS MUD Limited | Bristol | 2004 |
| Clare Bigger Sculptures Limited | Burnley | 2004 |
| Clare Finn & Company Limited | | 1981 |
| Clare Grossman Fine Arts Limited | London | 2026 |
| Clare Harding Limited | Essex | 2003 |