| Capital Sports Media Ltd | London | 2018 |
| Capital Strands Ltd | London | 2026 |
| Capital Support Ltd | London | 2018 |
| Capital Tax Recruitment Ltd | London | 2016 |
| Capital to Coast Facility Management Ltd | Keymer | 2020 |
| Capital UK Trading Ltd | Sevenoaks | 2024 |
| Capital University of Economics and Business (Beijing, China) Alumni Association in United Kingdom | London | 2019 |
| Capital V Limited | Manchester | 2016 |
| Capital Venture Limited | Ringwood | 1993 |
| Capital Ventures Europe Limited | Harrow | 2018 |
| Capital VIP Services Ltd | London | 2016 |
| Capital Wash Limited | Liverpool | 2021 |
| Capital Waste Limited | Dartford | 2019 |
| Capitalbase Limited | Lincoln | 1989 |
| Capitalworks Services Limited | London | 2018 |
| Capitaolondon Ltd | London | 2024 |
| Capitax Wills & Estates Ltd | Birmingham | 2026 |
| Capitelle Limited | Lytham St. Annes | 2020 |
| Capitex Limited | London | 2025 |
| Capitis Holdings Limited | Maidstone Road | 2005 |
| Capitol Catering Equipment Ltd | Croydon | 2007 |
| Capitol Cleaning Company (North West) Limited | Wirral | 1993 |
| Capitol House Productions (London) Limited | Morden | 1972 |
| Capitol Stud Farm Limited | Ipswich | 2011 |
| Capitoline Energy Partners Limited | Morden | 2019 |
| Caplin & Co Ltd | Stoke-On-Trent | 2021 |
| Caply Ltd | Middlessex | 2024 |
| Capmam Limited | Armagh | 2019 |
| Capo Barber Ltd | Bromley | 2026 |
| Capoeira Academy Limited | London | 2011 |
| Capoeira Club Essex Ltd | London | 2023 |
| Capones Barbers Limited | Trowbridge | 2012 |
| Capowillians Limited | Barnet | 2020 |
| Capp Limited | Chatham | 1995 |
| Cappadocia Transport Ltd | London | 2025 |
| Cappadocia Turkish Barber Limited | Bo'Ness | 2025 |
| Cappadocian Limited | London | 2017 |
| Cappagh Village Regeneration Ltd | Dungannon | 2010 |
| Cappelli Hair Studio Ltd | Mold | 2016 |
| Cappfill Property Services Ltd | Grays | 2017 |
| Cappo Ltd | Cardiff | 2024 |
| Cappsized Ltd | Wrexham | 2007 |
| Cappuccino Communications Limited | Warrington | 2018 |
| Cappuccinska Limited | London | 2011 |
| Cappy Sales Ltd | Bradford | 2025 |
| Capquest Debt Recovery Limited | Manchester | 1999 |
| Capra Enterprises Ltd | London | 2025 |
| Capri Extensions Ltd | Croydon | 2020 |
| Capri Luxury Tanning Ltd | Rochester | 2026 |
| Capri Trading Limited | Preston | 2017 |
| Caprica Ltd | London | 2022 |
| Caprice London Ltd | London | 2020 |
| Capricorn 13 Limited | Barnet | 2013 |
| Capricorn Cleaners Ltd | Longfield | 2012 |
| Capricorn Contracting Ltd | Ottery St. Mary | 2019 |
| Capricorn Estate Limited | London | 2015 |
| Capricorn Hair Studio Limited | Derbyshire | 2006 |
| Capricorn International Ltd | Hereford | 2017 |
| Capricorn Services ( Central) Ltd | Blackburn | 2024 |
| Capricornpr and Communications Limited | Hailsham | 2007 |
| Caps Upholstery Limited | Woking | 2018 |
| Capsized Eivissa Ltd | London | 2018 |
| Capstone Africa | Thornton Heath | 2014 |
| Capstone Church | Ilford | 2009 |
| Capstone Circle Ltd | Aylesbury | 2025 |
| Capstone Claims Services Ltd | Lytham St Annes | 2026 |
| Capstone Facilities Services Limited | London | 2013 |
| Capstone Home Limited | Taunton | 2002 |
| Capstone ITS Ltd | Ilford | 2019 |
| Capstone Professional Cleaning Contracts Limited | Kettering | 2008 |
| Capsugel UK Ltd | Slough | 2025 |
| Capsule Collective Ltd | Winchester | 2023 |
| Capsum Developments Ltd | Liverpool | 2022 |
| Capt Emiel Verhoeven Limited | Hythe | 2022 |
| Captain AI Technologies Ltd | London | 2014 |
| Captain Baby Limited | Harrow | 2022 |
| Captain Barbers Ltd | Bristol | 2018 |
| Captain Clampit Limited | Sheffield | 2003 |
| Captain Cook Limited | London | 1987 |
| Captain Crew Ltd | Sheffield | 2024 |
| Captain Curtain Ltd | Solihull | 2016 |
| Captain Events Ltd | Westbury | 2022 |
| Captain Fawcett Limited | Kings Lynn | 2011 |
| Captain K9 Ltd | Solihull | 2022 |
| Captain Paul Watson Foundation UK | London | 2005 |
| Captain Teds Limited | Newcastle Upon Tyne | 2010 |
| Captains of Industry Limited | Aldershot | 2016 |
| Captial Ventures Ltd | London | 2019 |
| Captify Technologies Ltd | London | 2011 |
| Captis Limited | London | 2017 |
| Captiva Scottish Landscapes Limited | Edinburgh | 2023 |
| Captive Animals Protection Society(The) | Manchester | 1987 |
| Captive Imports Ltd | Preston | 2021 |
| Captol UK Limited | Chatham | 2018 |
| CAPTUR3 Ltd | Altrincham | 2021 |
| Capture Accounting Ltd | Eastleigh | 2022 |
| Capture Carbon Solutions Limited | Whitchurch | 2018 |
| Capture Certification Ltd | Bath | 2009 |
| Capture DOP Ltd | Stevenage | 2014 |
| Capture Frame Productions Limited | Hayes | 2016 |