| Cocobros Chocolate Ltd | Newtownabbey | 2022 |
| Cocochemistry Limited | Chippenham | 2017 |
| Cocodec PVT Ltd | Luton | 2018 |
| Cocodelish Limited | London | 2024 |
| Cocodentax Ltd | Cardiff | 2018 |
| Cocohart Limited | Manchester | 2017 |
| Cocoluxe Ltd | Nuneaton | 2023 |
| Cocom Consumer Electronics Limited | Haywards Heath | 2009 |
| Cocomel Nusantara Ltd | London | 2024 |
| Cocomel Soaps Limited | Haddington | 2020 |
| Coconaya Limited | Woodford Green | 2021 |
| Coconut Chilli Limited | Bristol | 2006 |
| Coconut CUP Ltd | Birmingham | 2025 |
| Coconut Residence Limited | Bushey | 2010 |
| Coconut Systems Ltd | Bristol | 2026 |
| Coconutsytems Ltd | Bristol | 2026 |
| Cocoon & Bloom Ltd | Doncaster | 2025 |
| Cocoon & YOU Limited | Torquay | 2019 |
| Cocoon Labs Ltd | Leeds | 2014 |
| Cocoon Trading Limited | Alnwick | 1999 |
| Cocoon.Systems Limited | Belfast | 2025 |
| Cocopac Limited | Yeovil | 2008 |
| Cocopowder Ltd | London | 2023 |
| Cocopup Ltd | Witney | 2020 |
| Cocori Ltd | London | 2024 |
| Cocosorella Ltd | London | 2025 |
| Cocosuty Ltd | London | 2025 |
| Cocovini Construction Ltd | Sevenoaks | 2013 |
| Coco’S Campers Ltd | Huddersfield | 2024 |
| COD Beck Blenders Limited | Thirsk | 1988 |
| COD Head Brewing Company Ltd | Saltburn-By-The-Sea | 2023 |
| COD Steaks Limited | Bristol | 2002 |
| Coda Logistics Ltd | London | 2022 |
| Coda Plastics Limited | Norfolk | 1973 |
| Coda Solutions Ltd | Newport Pagnell | 2013 |
| Codamatic Limited | Wigan | 1995 |
| Codamotion Ltd | Oxford | 1987 |
| Codan Bionuclear Ltd | Aberystwyth | 2014 |
| Codar Ltd | Sheffield | 2013 |
| Coday Sheet Metal Fabrications (Great Yarmouth) Limited | Great Yarmouth | 1977 |
| Coddiwomplecider Ltd | London | 2023 |
| Code 11 Limited | Ossett | 2017 |
| Code 14 Limited | Crossgates Road Redditch | 1995 |
| Code Acoustics Ltd | London | 2022 |
| Code Happens Ltd | London | 2021 |
| Code Interiors Ltd | London | 2022 |
| Code Nation 1957 CIC | London | 2025 |
| Code Rods Limited | Braintree | 2023 |
| Code Serve Limited | Cardiff | 2010 |
| Code Visual Communications Ltd | Bishop'S Stortford | 2017 |
| Code Zero Limited | Southampton | 2004 |
| Code Zero Marine Ltd | Waterlooville | 2025 |
| Code-A-Weld (Great Yarmouth) Limited | Great Yarmouth | 1976 |
| CODE.194 Coffee Roasters Ltd | Chelmsford | 2023 |
| CODE1 Group Ltd | Berkhamsted | 2020 |
| Codebreaker Brew Co. Ltd | Lincoln | 2015 |
| Coded Cloth Ltd | Bath | 2020 |
| Coded Mind Clothing Ltd | Telford | 2022 |
| Coded Welding (Wolverhampton) Limited | Wolverhampton | 1986 |
| Codeguard Security Limited | Wyboston | 2002 |
| Codek Limited | Musselburgh | 2020 |
| Codel International Limited | Bakewell | 1982 |
| Codelocks International Limited | Berkshire | 1991 |
| Codem Composites Limited | Peterborough | 2009 |
| Codem Environmental Limited | Peterborough | 2020 |
| Codeology Group Limited | Salisbury | 2023 |
| Codeology Limited | Salisbury | 2005 |
| Codepack Solutions Limited | Chelmsford | 1999 |
| Coder INK JET Printer Services Limited | Swindon | 1996 |
| Coderipple Limited | London | 2020 |
| Codetronix Limited | Leeds | 2017 |
| Codeweld Limited | Newport | 2024 |
| Codex Print Limited | Doncaster | 2011 |
| Codex Tech Limited | London | 2006 |
| Codex Technology Ltd | Cambridge | 2025 |
| Codina Jewellery Ltd | London | 2024 |
| Coding & Handling Limited | Wellingborough | 2011 |
| Codis Maya Limited | London | 2002 |
| Codita Aviation Ltd | London | 2025 |
| Coditeck UK Ltd | Stafford, | 2024 |
| Codnor Laser Fabrications Limited | Ripley | 2025 |
| CODO8 | Downpatrick | 2020 |
| Codooro Group (UK) Ltd | Beckenham | 2017 |
| Codrus Fire Detection Systems Limited | Aylesbury | 1995 |
| Cody Aerospace & Defence Ltd | London | 2025 |
| COE Fabrications Limited | Grimsby | 2005 |
| COE Industries Ltd | Aylesbury | 2024 |
| COE Steel Ltd | Bishop Auckland | 2024 |
| Coe's Bespoke Jewellers Limited | Hornchurch | 2019 |
| Coed Dinefwr Limited | Llanelli | 2008 |
| Coedcanlas Ltd | Narberth | 2025 |
| Coelbrew Ltd | St. Andrews | 2021 |
| Coelux UK Ltd | London | 2014 |
| Coercive Systems Limited | Rochester | 1992 |
| Coeth Limited | Leigh-On-Sea | 2025 |
| Coetzer Technical Services Limited | Trowbridge | 2015 |
| Coeval Limited | Glasgow | 1987 |
| Cofa Limited | Leeds | 2024 |
| Cofast Limited | Weston-Super-Mare | 2026 |
| Cofer Group Company Limited | Stafford | 2022 |