| Capital Door Services Limited | Halstead | 2008 |
| Capital Doors UK Ltd | Halstead | 2021 |
| Capital Ductwork Ltd | Sheerness | 2022 |
| Capital Event Support Ltd | London | 2012 |
| Capital Fabrications Limited | Barry | 2024 |
| Capital Flooring Limited | Burton On Trent | 2014 |
| Capital Garage Equipment Limited | Barry | 2019 |
| Capital GAS & Heating Services Limited | Northwood Hills | 2015 |
| Capital Glass Mirrors Limited | London | 2016 |
| Capital Grid Systems Limited | Newport | 2023 |
| Capital Heating & Plumbing Services Limited | Bexley | 2016 |
| Capital Home Services UK Ltd | London | 2019 |
| Capital Imaging Ltd | Edinburgh | 2026 |
| Capital Imports Limited | London | 2025 |
| Capital Injection Ceramics Limited | Newcastle Upon Tyne | 2007 |
| Capital Joinery Limited | London | 2006 |
| Capital Kiosk Co Ltd | Coventry | 2006 |
| Capital Kitchens & Bedrooms Ltd | London | 2020 |
| Capital Letters Limited | Birmingham | 1998 |
| Capital Lift Truck Services Limited | Wokingham | 2005 |
| Capital Lifts Ltd | Caterham | 2015 |
| Capital Locksmiths Limited | London | 2014 |
| Capital Machinery Services Limited | Newry | 2015 |
| Capital Mounts Limited | London | 2024 |
| Capital One Fashion Ltd | Leicester | 2015 |
| Capital Optics Ltd | Edinburgh | 2013 |
| Capital Plant Limited | Braintree | 2001 |
| Capital Plant Services Limited | Edmonton | 2003 |
| Capital Poster Services Limited | Stanstead Abbotts | 1999 |
| Capital Power Clean Limited | Renfrew | 2007 |
| Capital Power Electric Ltd | Southampton | 2023 |
| Capital Printer Services Ltd | London | 2025 |
| Capital Pumps Ltd | Essex | 2021 |
| Capital Ready MIX Concrete Limited | London | 2017 |
| Capital Refractories Limited | Derbyshire | 1973 |
| Capital Reinforcing (Ireland) Limited | Omagh | 2002 |
| Capital Reinforcing Ltd | Wirral | 2015 |
| Capital Republic Ltd | Shepperton | 2010 |
| Capital Roasters Limited | Pembroke Dock | 1999 |
| Capital Rubber & Plastics Limited | London | 1986 |
| Capital Safety Group (Northern Europe) Limited | London | 1985 |
| Capital Sheet Metal Limited | Cardiff | 2011 |
| Capital Ship Management Ltd | Balmerino | 2018 |
| Capital Site Supplies Ltd | Dartford | 2024 |
| Capital Springs and Pressings Limited | Edenbridge | 1986 |
| Capital Steam Installations Ltd | Loughton | 2014 |
| Capital Steel Limited | Dalry | 2004 |
| Capital Stone Products Limited | Edinburgh | 2021 |
| Capital Stone Renovation Ltd | London | 2012 |
| Capital Stories Ltd. | Devizes | 2024 |
| Capital Trading (Holdings) Limited | Newport | 1991 |
| Capital Valley Plastics Limited | Maidenhead | 1987 |
| Capital Wealth Management Ltd | Cardiff | 2022 |
| Capital Window Manufacturing (Commercial) Limited | Chesham | 1988 |
| Capital Window Manufacturing (Holdings) Ltd | Chesham | 2012 |
| Capital Window Manufacturing (Uxbridge) Limited | Chesham | 1984 |
| Capital Windows & Conservatories (NW) Limited | Manchester | 2006 |
| Capitall Systems Limited | Evesham | 2002 |
| Capitan Group Limited | Droitwich | 2019 |
| Capitaz Ltd | Worthing | 1994 |
| Capitol Carpets by Steve Foster + Associates Limited | Preston | 2002 |
| Capitol Digital Ltd | Rochford | 2010 |
| Capitol Door Solutions Ltd | Barnsley | 2014 |
| Capitol Imagesetters Ltd. | Ross-On-Wye | 1985 |
| Capitol Solutions Limited | Wallasey | 2003 |
| Caple Forge Ltd | Hereford | 2011 |
| Caple Ltd. | Hereford | 1997 |
| Caplin TEC Limited | St. Asaph | 2023 |
| Capnal Limited | Farnham | 2015 |
| Capnova CO2 Ltd | Hove | 2026 |
| Capocci MAN Limited(The) | Airdrie | 1960 |
| Capper Engineering Services | Watford | 1984 |
| Capper Trading Limited | Co Tyrone | 1987 |
| Capper-Neill General Fabrications Limited | St. Helens | 2022 |
| Cappers Newton Ltd | Wednesbury | 2019 |
| Cappture Ltd | London | 2023 |
| Cappuccino Coffee Machine Company Limited(The) | Birmingham | 1985 |
| Caprari Pumps (U.K.) Limited | Orton Southgate | 1986 |
| Capreolus Distillery Ltd | Cirencester | 2014 |
| Capri Clothing 1891 Limited | Coatbridge | 2019 |
| Capri Fast Food Ltd | West Midlands | 2017 |
| Capri Foods Limited | Isleworth | 1983 |
| Capri Newco UK Limited | Solihull | 2026 |
| CAPRI-1891 Limited | Coatbridge | 2024 |
| Caprice Atelier Ltd | Maldon | 2023 |
| Caprice Motors Limited | Glastonbury | 2013 |
| Capricorn Applied Technology Ltd | Basingstoke | 2026 |
| Capricorn Architectural Services Limited | Wolverhampton | 2002 |
| Capricorn Automotive Limited | Basingstoke | 1992 |
| Capricorn Blinds Limited | Solihull | 1998 |
| Capricorn Coating Services Limited | Birmingham | 2002 |
| Capricorn Controls Holdings Limited | Banbury | 2023 |
| Capricorn Controls Limited | Oxfordshire | 1996 |
| Capricorn Conversions Ltd | Cheadle | 2019 |
| Capricorn Detergents Limited | Luton | 2001 |
| Capricorn Kitchen Studios Limited | Liverpool | 1993 |
| Capricorn Limited | London | 1991 |
| Capricorn Marine Service Co., Limited | Beckenham | 2025 |
| Capricorn Mouldings Limited | Telford | 1983 |
| Capricorn Studios Ltd | London | 2023 |