| Chromex Technology Limited | St Asaph | 2010 |
| Chromis UK Limited | Fleet | 2005 |
| Chromium Group Limited | Tamworth | 2017 |
| Chromoprint Limited | Leeds | 2024 |
| Chronic Insanity Ltd | Nottingham | 2015 |
| Chronic Youth CIC | West Wickham | 2024 |
| Chronickel Limited | Tipton | 2020 |
| Chroniq Labs Ltd | London | 2025 |
| Chrono Kronos & Co. Limited | Kington | 2026 |
| Chrono Shine Ltd | Warrington | 2025 |
| Chronova Engineering Ltd | Poole | 2022 |
| Chrs Fluid Limited | Northallerton | 2025 |
| Chrysalis Clothes Limited | Northampton | 1985 |
| Chrysalis Health & Beauty Business Solutions Ltd | Nottingham | 2007 |
| Chrysalis Health Beauty Business Solutions Limited | Nottingham | 2026 |
| Chrysalis Rail Services Limited | Crewe | 2010 |
| Chrysallis Associates Ltd | Whitehills Business Park | 2013 |
| Chrysalys CIC | Abingdon | 2020 |
| Chrysantios Limited | London | 2024 |
| Chrysos Smith Ltd | London | 2026 |
| Chrystal's Shortbread Ltd | Helensburgh | 2017 |
| CHS Car & Van Accident Repair Centre (London) Ltd | Ilford | 2017 |
| CHS Engineers Ltd | London | 2012 |
| CHS Online Ltd | Coventry | 2016 |
| CHS Tactical Ltd | Truro | 2020 |
| Chsd Playing Cards Limited | Southampton | 2020 |
| Chsn Ltd | Ruislip | 2019 |
| CHT Technical Services Ltd | St Helens | 2024 |
| CHT UK Bridgwater Ltd. | Somerset | 1974 |
| Chtain Group Limited | Cardiff | 2024 |
| CHU Leic Limited | Manchester | 2020 |
| CHU SHU Limited | Bodmin | 2024 |
| Chuangbao Asia Pactific Co., Limited | Kenilworth | 2024 |
| Chuangqian International Trade Co., Ltd. | Beckenham | 2025 |
| Chuangze AI UK Research Center Ltd | Weston Super Mare | 2020 |
| Chubb's Weld & Fabrication Limited | Leighton Buzzard | 2023 |
| Chubbmix Limited | Scunthorpe | 2019 |
| Chubbs Steel Trades Limited | Southport | 2023 |
| Chubby Bags (UK) Limited | Aberdeen | 2001 |
| Chubby Seal Ltd | Holt | 2016 |
| Chubby Wheels Ltd | Newquay | 2021 |
| Chubscakes Limited | Sunderland | 2024 |
| Chuc Joinery Limited | Doncaster | 2024 |
| Chuck and Bertie Ltd | Wirral | 2024 |
| Chuckle Soaps Ltd | Farnham | 2020 |
| Chucklehead Cider Ltd | Chichester | 2010 |
| Chuckling Goat Limited | Llandysul | 2014 |
| Chucks Chocs Limited | London | 2026 |
| Chucky Chuckz Limited | Bury St. Edmunds | 2013 |
| Chudeeze Ltd | Woking | 2026 |
| Chuff Ltd | South Brent | 2024 |
| Chug Ltd | Hounslow | 2025 |
| Chugoku Paints (UK) Limited | London | 1982 |
| Chuhay & Sons Ltd | London | 2026 |
| Chukka & Punch Ltd | Royston | 2024 |
| Chukka Global Commodities Limited | Altrincham | 2024 |
| Chulha Ltd | Batley | 2026 |
| Chumi and Laxman Creation Ltd | Bristol | 2023 |
| Chunc Limited | Leominster | 2009 |
| Chunchen Ltd | London | 2023 |
| Chungums Limited | Gloucester | 2023 |
| Chunk Cookies Ltd | Leeds | 2023 |
| Chunk Monkey Ltd | Swansea | 2024 |
| Chunk of Devon Limited | Ottery St Mary | 2006 |
| Chunkichilli Knitwear Limited | Cheltenham | 2004 |
| Chunkies Ltd | London | 2024 |
| Chunky Blocks Limited | Chard | 2023 |
| Chunky Chairs Ltd | Market Harborough | 2018 |
| Chunky Chops Limited | Belper | 2013 |
| Chunky Jacks Limited | Stafford | 2023 |
| Chunky Lumber Ltd | Taunton | 2023 |
| Chunky Reclaimed Furniture Ltd | Banwell | 2018 |
| Chunk’D Ltd | Oxford | 2025 |
| Chunnam Offshore Wind Services Limited | Stockton-On-Tees | 2018 |
| Chuplis Bodyworks Limited | Southall | 2025 |
| Church & Bloomfield Ltd | Chatham | 2023 |
| Church & Co Limited | | 1926 |
| Church & Dwight UK Limited | Folkestone | 1942 |
| Church & Gooderham Limited | Norwich | 2005 |
| Church Cottage Furnishings Limited | Attleborough | 2013 |
| Church Door Coffee Ltd | Blackpool | 2026 |
| Church END Brewery Limited | Warwickshire | 1994 |
| Church Farm Assembly Limited | Letchworth Garden City | 2014 |
| Church Farm Brewery Ltd | Warwick | 2015 |
| Church Finance Supplies Limited | Abingdon | 1967 |
| Church Group Limited | Hounslow | 2023 |
| Church Hill Hire Management Services Ltd | London | 2011 |
| Church House Jewellery Limited | Bristol | 2004 |
| Church Lane Joinery Limited | Oxfordshire | 2004 |
| Church Minshull Marina Limited | Nantwich | 2007 |
| Church Products UK Limited | Beccles | 2020 |
| Church Street Brewery Ltd | Buckingham | 2021 |
| Churchdown Mechanical Services Ltd | Gloucester | 2012 |
| Churchfield Education Products Limited | Walsall | 2016 |
| Churchfield Group Ltd | Stoke-On-Trent | 2016 |
| Churchill Brothers Limited | Colchester | 2006 |
| Churchill Ceramics (UK) Limited | Stoke-On-Trent | 1997 |
| Churchill China (UK) Limited | Stoke-On-Trent | 1932 |
| Churchill China PLC | Stoke-On-Trent | 1992 |
| Churchill Contractors Limited | Wolverhampton | 1979 |