| Classic Cuisine (Midlands) Limited | Birmingham | 2003 |
| Classic Cuisine of Northampton Limited | Nottingham | 2008 |
| Classic Cuts Limited | London | 1997 |
| Classic Dental Laboratory Limited | Ashford | 2025 |
| Classic Desserts Limited | Penrith | 1998 |
| Classic Desserts Topco Limited | Kirkcudbright | 2012 |
| Classic Dispense Equipment Limited | Wolverhampton | 2002 |
| Classic Doors and Windows Limited | London | 1999 |
| Classic Driving Development Ltd | Shipston-On-Stour | 2011 |
| Classic Engines Ltd | London | 2025 |
| Classic Filters Ltd | Rochester | 2001 |
| Classic Filters NGV Limited | Rochester | 2014 |
| Classic Firearms UK Ltd | March | 2022 |
| Classic Flying Machine Collection Limited | Norwich | 2000 |
| Classic Fork Trucks Limited | Nuneaton | 2017 |
| Classic Furniture Group Limited | Walsall | 1971 |
| Classic Graphics Limited | Reading | 2005 |
| Classic Grown Diamonds UK Ltd | London | 2022 |
| Classic Guns Limited | London | 2020 |
| Classic Hats Limited | London | 2009 |
| Classic Hats Trading Ltd | London | 2016 |
| Classic Home Improvements (Southampton) Limited | Southampton | 1996 |
| Classic Images UK Limited | Chessington | 2002 |
| Classic Jaguar Racing Limited | Tenterden | 1997 |
| Classic Joinery (Sussex) Limited | Hailsham | 2002 |
| Classic Joinery Products Limited | Falkirk | 2011 |
| Classic Kitchen Worktops Ltd | Egham | 2025 |
| Classic Kitchens & Interior Ltd | Leicester | 2016 |
| Classic Kitchens(Whitland) Limited | Whitland | 2004 |
| Classic Leather Fobs Limited | Brigg | 2011 |
| Classic Lines Plus Signs Limited | Nottingham | 2011 |
| Classic Machine Shop Ltd | Loughborough | 2024 |
| Classic Mantels Limited | Arundel | 2016 |
| Classic Marble (Showers) Limited | Dungannon | 1993 |
| Classic Metals Ltd | Slough | 2022 |
| Classic Mineral Water Company Limited | Belfast | 1976 |
| Classic Mini Electric Conversions Ltd | Higham | 2022 |
| Classic Miniatures Limited | Feltham | 1977 |
| Classic Motor Works Limited | Northchapel | 2026 |
| Classic Motor Yachts Limited | Leigh-On-Sea | 2021 |
| Classic Plates Limited | Nottingham | 2022 |
| Classic Pods Limited | Coventry | 2024 |
| Classic Printers (Crowland) Ltd | Peterborough | 2016 |
| Classic Race Engineering Ltd | Holbeach | 2023 |
| Classic Refurbishments Ltd | Market Harborough | 2022 |
| Classic Renovation Ltd | Leicester | 2025 |
| Classic Restoration and Repair Ltd | Wigton | 2019 |
| Classic Sailboats Ltd | Bangor | 2003 |
| Classic Sash Restoration Limited | Harrogate | 2007 |
| Classic Scan Limited | Kettering | 2018 |
| Classic Screen (Manufacturing) Ltd. | Birkenhead | 1985 |
| Classic Shipwright Services Ltd | Brockenhurst | 2025 |
| Classic Showjumps Limited | Lancashire | 1997 |
| Classic Sign and Design Limited | Leeds | 2002 |
| Classic Soft Furnishings Limited | Glasgow | 2005 |
| Classic Solutions Engineering Limited | Durham | 2008 |
| Classic Stitch Embroidery Limited | Newcastle | 2013 |
| Classic Stitch Prints & Embroidery Ltd | Wolverhampton | 2024 |
| Classic Stone London Ltd | Wembley | 2025 |
| Classic Stone Ltd | Wembley | 2019 |
| Classic Surface Preparation and Storage Limited | Glasgow | 2023 |
| Classic Tailors Ltd | London | 2026 |
| Classic Team Lotus Limited | Norfolk | 1993 |
| Classic Turntables Service Repair Sales Ltd | Wakefield | 2022 |
| Classic Ventilation.Canopy Ltd | Birmingham | 2022 |
| Classic Wardrobes and Kitchens Ltd | Hayes | 2025 |
| Classic Windows and Conservatories Limited | Malmesbury | 1989 |
| Classic Windows Yorkshire Limited | Keighley | 2021 |
| Classic Wood Mouldings Limited | Tenterden | 2005 |
| Classic Workwear Ltd | Blackburn | 2019 |
| Classic Yacht Events Ltd | Newport | 2004 |
| Classic Yacht Management Ltd | Princes Risborough | 2019 |
| Classic Yacht Services Ltd | Waterlooville | 2022 |
| Classic Yachts Ltd | Mildenhall | 2019 |
| Classical Blinds Ltd | Liverpool | 2016 |
| Classical Creations Limited | Brunswick Village | 2015 |
| Classical Style Designs Ltd | Milton Keynes | 2024 |
| Classicos Aqua Limited | Stourbridge | 2026 |
| Classicpro UK Ltd | Pershore | 2020 |
| Classics & Chrome Ltd | Hinckley | 2006 |
| Classics Castings Ltd | St. Albans | 2025 |
| Classified Central Media Limited | London | 2012 |
| Classified Doorset Solutions Limited | Newbiggin-By-The-Sea | 2026 |
| Classigns Ltd | London | 2026 |
| Classique Bedrooms Ltd. | Oxford | 2010 |
| Classique Design & Print Limited | Elmstead | 2006 |
| Classneat Limited | Middlesbrough | 1992 |
| Classy Bedrooms and Kitchens Ltd | Feltham | 2026 |
| Classy Snax Limited | Glasgow | 2004 |
| Classy Wood Ltd | London | 2026 |
| Classypac Ltd | London | 2025 |
| Claud's Catering Ltd | Newcastle Upon Tyne | 2019 |
| Claude Lyons Limited | Hoddesdon | 2023 |
| Claudelci Ltd | Essex | 2025 |
| Claudi and FIN Limited | Belper | 2012 |
| Claudia Bradby Limited | Salisbury | 2001 |
| Claudialigari Limited | Wembley | 2018 |
| Claudie Sky Limited | London | 2013 |
| Claudio Aritzu Ltd | London | 2019 |
| Claudio Campo Parfums Ltd | Whitstable | 2024 |