| Calder Valley Marine Limited | Sheffield | 2002 |
| Calder Valley Skip Hire Limited | Rugby | 1999 |
| Calder Weaving Company Limited | Elland | 1991 |
| Calder Wood Joinery Ltd | Todmorden | 2016 |
| Calder's Kitchen Limited | Darlington | 2015 |
| Caldera Heat Batteries Limited | Fareham | 2017 |
| Calderbrook Woodworking Machinery Limited | The Sidings, Bacup | 1994 |
| Caldercraft (1991) Limited | Northallerton | 1988 |
| Calderdale Carpets Limited | Dewsbury | 1987 |
| Calderdale Engineering Services Limited | Halifax | 1988 |
| Calderpips Music Ltd | Aylesbury | 2025 |
| Calders & Grandidge (Boston) Limited | Boston | 2020 |
| Calderstone Design & Print Limited | Wellingborough | 1990 |
| Calderstone Productions Limited | London | 2012 |
| Caldervale Machine Tool Engineers Ltd | Airdrie | 2013 |
| Caldervale Technology Limited | Dewsbury | 1992 |
| Calderwood Manufacturing Limited | Bacup | 2024 |
| Caldew Kitchens Limited | Wigton | 2002 |
| Caldex Holdings Limited | Halifax | 2007 |
| Caldey Island Estate Company Limited | Tenby | 1971 |
| Caldic Ingredients UK Ltd. | Chesterfield | 2014 |
| Caldimore Ltd | London | 2019 |
| Caldmore Ltd | West Midlands | 2006 |
| Caldron Corporation Limited | London | 1938 |
| Caldwell and Cook Metalworks Ltd | Stevenage | 2026 |
| Caldwell Ceilings Company Ltd | Nottingham | 2023 |
| Caldwell Filtration Limited | Appleton Warrington | 1975 |
| Caldwell Hardware (UK) Limited | Manchester | 1953 |
| Caldwell Metalwork Fabrication Ltd | Northampton | 2007 |
| Caldwell Steel Ltd | Castlederg | 2012 |
| Caldwells (Windows) Limited | Wigan | 2001 |
| Caldy Signs Limited | West Kirby | 2020 |
| Cale Signs Limited | Manchester | 2023 |
| Calea UK Limited | Runcorn | 1990 |
| Caledan Limited | Hengoed | 2011 |
| Caledin Ltd | Arbroath | 2010 |
| Caledon Controls Ltd. | Motherwell | 1993 |
| Caledon Precision Engineering Ltd | Caledon | 2008 |
| Caledonia & Rose Limited | Brierley Hill | 2026 |
| Caledonia ALL Trades Ltd | Glasgow | 2022 |
| Caledonia Art Embroidery and Handmade Limited | Dunfermline | 2025 |
| Caledonia Crest Ltd | Edinburgh | 2025 |
| Caledonia Fine Arts Ltd | Lesmahagow | 2025 |
| Caledonia Forklifts Ltd | Glasgow | 2024 |
| Caledonia Hosiery Limited | Forres | 2019 |
| Caledonia Life C.I.C. | Gourock | 2025 |
| Caledonia Lightcraft Ltd | Glasgow | 2025 |
| Caledonia LOG Homes Limited | Hawick | 2011 |
| Caledonia Peptides Ltd | Glasgow | 2026 |
| Caledonia Play Ltd | Kinross | 1994 |
| Caledonia Printers West Limited | East Kilbride | 1996 |
| Caledonia Services Limited | Aberdeen | 2007 |
| Caledonia Signs Limited | Kirkcaldy | 1996 |
| Caledonia Test Services Limited | Dalkeith | 2025 |
| Caledonian Access Limited | Aberdeen | 2020 |
| Caledonian Air Limited | Bonnybridge | 2017 |
| Caledonian Airborne Systems Limited | London | 1987 |
| Caledonian Bottlers PLC | Edinburgh | 1993 |
| Caledonian Ceramics Dental LAB Ltd | Edinburgh | 2025 |
| Caledonian Cider Company Limited | Dingwall | 2017 |
| Caledonian Commercial Caliper Company Limited | Fortrose | 2013 |
| Caledonian Control Systems Ltd | Broxburn | 2016 |
| Caledonian Control Technology Limited | Redditch | 1987 |
| Caledonian Electrical Services Limited | Johnstone | 2007 |
| Caledonian Esco Limited | Forfar | 2012 |
| Caledonian Ferguson Timpson Limited | Glasgow | 1974 |
| Caledonian Furniture Company Limited | Cumbernauld | 1982 |
| Caledonian Furniture Manufacturing Limited | Glasgow | 1986 |
| Caledonian Glassworks UK Ltd | Glasgow | 2011 |
| Caledonian Industries Limited | Glasgow | 2001 |
| Caledonian Laser Services Ltd | Dunoon | 2025 |
| Caledonian Laundry Engineering Ltd | Glasgow | 2017 |
| Caledonian Lifts Manchester Ltd | Nottingham | 2017 |
| Caledonian Machine Tools Ltd. | | 2007 |
| Caledonian Optical Limited | Aberdeen | 1974 |
| Caledonian Packaging Limited | | 1976 |
| Caledonian Petfoods Limited | Dumfries | 2009 |
| Caledonian Plywood Company Ltd. | Glasgow | 1999 |
| Caledonian Quilting Co. Limited | Bolton | 1970 |
| Caledonian Skye Distillers Limited | Portree | 2023 |
| Caledonian Stairlifts Limited | Hamilton | 2019 |
| Caledonian Tape Convertors Limited | Inverness | 1980 |
| Caledonian Trade Frames Limited | Ayr | 2018 |
| Caledonian Windows & Conservatories Ltd. | Ayr | 1997 |
| Caledoniantimbersolution Ltd | Cleethorpes | 2026 |
| Calendar Wonderland Limited | Waltham Abbey | 2013 |
| Calendarsrus Limited | Blackburn | 2023 |
| Calenion Apparel Limited | Hinckley | 2019 |
| Caleva Process Solutions Ltd. | Sturminster Newton | 1995 |
| Calex Electronics Limited | Leighton Buzzard | 1999 |
| Caley Coaches Ltd | Glasgow | 1992 |
| Caley Ocean Systems Limited | Aberdeen | 1999 |
| Caley Outdoors Ltd | Edinburgh | 2026 |
| Caley Print & Stationery Limited | Glasgow | 1996 |
| Caley's of Norwich Limited | Stockbridge | 1995 |
| Calf HEY Design Limited | Huddersfield | 1993 |
| Calf HEY Rotary Limited | Huddersfield | 1995 |
| Calfab Limited | Aberdeen | 2021 |
| Calfpress Ltd | Amersham | 2023 |
| Calgas Limited | Leicester | 2006 |