| Chai Veda Limited | Harrow | 2025 |
| Chaice Cream Ltd | Bradford | 2024 |
| Chaiert Trade Co., Limited | London | 2024 |
| Chaifull Ltd | Edinburgh | 2025 |
| Chaii Adda Limited | Ilford | 2026 |
| Chaiinaya XIX Ltd | London | 2025 |
| Chain and Conveyor Limited | Knutsford | 2002 |
| Chain and Sprocket Ltd | Darlington | 2020 |
| Chain Gang Bike Repairs Ltd | Yeovil | 2019 |
| Chain House Brewing Company Ltd | Preston | 2017 |
| Chain of Deeds Ltd | Birmingham | 2024 |
| Chain Products Limited | Solihull | 1983 |
| Chain Reaction (Scotland) Ltd | Wishaw | 2023 |
| Chain Warehouse Limited | Solihull | 2000 |
| Chain Works Ltd | London | 2026 |
| Chainbond Limited | Manchester | 1982 |
| Chaind Jewellery Ltd | London | 2023 |
| Chainergy Technologies (UK) Limited | London | 2020 |
| Chainfluence Ltd | Edinburgh | 2025 |
| Chaingang Ltd | Bristol | 2025 |
| Chainings Limited | Gloucester | 1983 |
| Chainline Workshop Limited | Kilmarnock | 2026 |
| Chainlink Bikes Ltd | London | 2018 |
| Chains Direct Scotland Limited | Kilmarnock | 2012 |
| Chainstream (UK) Limited | London | 1998 |
| Chaintec Fittings Ltd | Leeds | 2012 |
| Chair Supplies Ltd | Leeds | 2021 |
| Chaircabinet Limited | Bishop Auckland | 2011 |
| Chairclass Upholstery Limited | London | 2018 |
| Chairmakeruk Ltd | London | 2024 |
| Chairman Creatives Ltd | Durham | 2025 |
| Chairplan Limited | Milton Keynes | 1995 |
| Chairwell Seating Limited | Rugby | 2016 |
| Chak Rogers Carpentry Ltd | Kings Langley | 2024 |
| Chakahindi Ltd | London | 2026 |
| Chakde Life Limited | Bury St. Edmunds | 2023 |
| Chakow Limited | London | 2023 |
| Chakra Coffee Roastery & Consultancy Ltd | Bury St. Edmunds | 2022 |
| Chakra Foods Ltd | Bristol | 2023 |
| Chakra Holistic Limited | London | 2026 |
| Chakrapulse Ltd | Birmingham | 2024 |
| Chala Chai Ltd | Craigavon | 2020 |
| Chalcon Limited | | 1913 |
| Chaley Sauce Ltd | London | 2016 |
| Chalfont Crafts & Design Ltd | Gerrards Cross | 2019 |
| Chalfont House Limited | West Bromwich | 1931 |
| Chalfont Refrigeration Services Limited | Royston | 2003 |
| Chalford Compost Limited | Leominster | 2025 |
| Chalgrove Artisan Distillery Limited | Oxford | 2017 |
| Chalice Champagne Limited | Plymouth | 2021 |
| Chalice Mead Limited | Crab Apple Way, Vale Park, Evesham | 2015 |
| Chalice Medical Limited | Worksop | 1998 |
| Chalicious Limited | Manchester | 2021 |
| Chalk & Charcoal Limited | Berkhamsted | 2015 |
| Chalk Down Lime Limited | Rye | 1997 |
| Chalk Dust Limited | Eastbourne | 2025 |
| Chalk Hill Studios Ltd | Polegate | 2020 |
| Chalk Jewellery Ltd | Holborn | 2021 |
| Chalk Kitchens Ltd | Torquay | 2015 |
| Chalk Lion Distillery Limited | Towcester | 2025 |
| Chalk Wovens UK Ltd | Worthing | 2012 |
| Chalkdown Wine Limited | Winchester | 2013 |
| Chalke Valley Engineering Group Ltd | Bolton | 2019 |
| Chalke Valley Soaps Ltd | Salisbury | 2022 |
| Chalkhaven Ltd | Ruislip, | 2025 |
| Chalkhouse Kitchens Ltd | Penarth | 2012 |
| Chalkhouse Ltd | London | 2020 |
| Chalkpit Design Limited | Chichester | 2026 |
| Chalkpit Limited | Isle Of Wight | 2017 |
| Chalkstrim Ltd | Wigston | 2025 |
| Chalky Composites Limited | Burton-On-Trent | 2019 |
| Challenge Electronics Limited | Stevenage | 1995 |
| Challenge Engineering Limited | Stoke-On-Trent | 2013 |
| Challenge Engineering Works Limited | Poole | 2009 |
| Challenge Fire Limited | Aylesbury | 2009 |
| Challenge Forge Limited | Liverpool | 2003 |
| Challenge ME Limited | Salford | 2025 |
| Challenge Packaging Limited | Coalville | 2002 |
| Challenge Power Transmission Limited | Wolverhampton | 1996 |
| Challenge Supply Co. Limited | Doncaster | 2012 |
| Challenger Engineering Ltd | Market Rasen | 2023 |
| Challenger Games Limited | Redditch | 2021 |
| Challenger Glass Ltd | Altrincham | 2013 |
| Challenger Handling Limited | Owl Lane | 1995 |
| Challenger Hydraulics Limited | Owl Lane Dewsbury | 1988 |
| Challengerchopshop Ltd | Barnsley | 2026 |
| Challengers Carpentry & Joinery Limited | Brierley Hill | 2025 |
| Challis & Sons Ltd | Ipswich | 2009 |
| Challis Reed Ltd | St Ives | 2012 |
| Chalmers & Milne Limited | Dundee | 1999 |
| Chalmers Electrical Services Ltd | Westhill | 2023 |
| Chalmor Limited | Luton | 1952 |
| Chalon Components Limited | Warrington | 2000 |
| Chalon Controls Limited | Warrington | 1988 |
| Chalukyi Ltd | Bletchingley | 2021 |
| Chamar Label Ltd | Birmingham | 2022 |
| Chambali Wellness Ltd | Feltham | 2022 |
| Chamber 3 Ltd | Glasgow | 2020 |
| Chamberlain Plastics International Limited | Northampton | 2012 |
| Chamberlain Precision Limited | Sheerness | 2001 |