| Calm Mind Studio Asmr Ltd | Boston | 2025 |
| Calm Restored Limited | Bromley | 2011 |
| Calm Resurgence Limited | Cambridge | 2023 |
| Calm Sail Services Ltd | Glasgow | 2023 |
| Calm Therapies Ltd | Leicester | 2023 |
| Calm Thinking Limited | Hoylake | 2020 |
| Calm Waters Worthing Ltd | Portsmouth | 2025 |
| Calma Acadmey Ltd | Dunfermline | 2025 |
| Calma Barber Ltd | Twickenham | 2025 |
| Calma Beauty Ltd | London | 2024 |
| Calma K9 Group Ltd | London | 2018 |
| Calma Salons Ltd | Altrincham | 2024 |
| Calma-Stay Limited | Glasgow | 2024 |
| Calmblue Limited | Edinburgh | 2011 |
| Calmcore Ltd | Cambridge | 2025 |
| Calmcubs Ltd | London | 2025 |
| Calmed Springs Limited | St. Helens | 2024 |
| Calmer Canines Ltd | Ormskirk | 2023 |
| Calmer CX Group Limited | Sheffield | 2025 |
| Calming Space Limited | Burghfield Common | 2022 |
| Calmingales Beauty Limited | Bicester | 2022 |
| Calmly Ltd | London | 2020 |
| Calnan Enterprises Limited | Peterborough | 2017 |
| Calne Estates Ltd | London | 2023 |
| Calne Heritage Centre Trust | Chippenham | 2004 |
| Calne Springs C.I.C. | Calne | 2012 |
| Calne Top Hand Car Wash Limited | Calne | 2019 |
| Calneclass Ltd | Wiltshire, | 2023 |
| Calocoach Ltd | Crewe | 2024 |
| Calon Adhd Project-Cap CIC | Swansea | 2021 |
| Calon Beauty Ltd | Cardiff | 2024 |
| Calon Homecare Carmarthenshire Limited | Llanelli | 2023 |
| Calon in the Community Ltd | Cardiff | 2023 |
| Calonia Ltd | Maidstone | 2013 |
| Calonik Ltd | Haverfordwest | 2018 |
| Calos Funeral Directors Limited | Middlesex | 2003 |
| Calpurnia Limited | Bootle | 2018 |
| Cals Canines Ltd | Dundee | 2025 |
| Calsands 200 Limited | Manchester | 2020 |
| Calsands 400 Limited | Blackburn | 2020 |
| Calsands 800 Limited | Sheffield | 2020 |
| Calsands Limited | Northampton | 2020 |
| Calshar Collectables Ltd | London | 2026 |
| Calsnutrifit Ltd | New Malden | 2024 |
| Calstat Limited | Widnes | 1989 |
| Calsteph Limited | Nottingham | 2011 |
| Caltec Production Solutions Limited | Milton Keynes | 2018 |
| Caltech & Control Ltd | Middlesbrough | 2023 |
| Caltech Commercial Ltd | Hull | 2020 |
| Caltinvestment Group Ltd | London | 2017 |
| Calum Finlay Limited | Woodford Green | 2015 |
| Calum Hall Hair Design Ltd | North Shields | 2022 |
| Calvadon Limited | Leeds | 1982 |
| Calvario Limited | Rugby | 2017 |
| Calvary Bible Church International Ltd | Liverpool | 2025 |
| Calvary Chapel Birmingham Limited | Birmingham | 2004 |
| Calvary Chapel Cambridge Limited | Cambridge | 2011 |
| Calvary Chapel East Dulwich Limited | London | 2007 |
| Calvary Chapel Hastings Limited | St. Leonards-On-Sea | 2009 |
| Calvary Chapel Leatherhead Limited | Ashtead | 2007 |
| Calvary Chapel Mansfield Limited | Mansfield | 2003 |
| Calvary Chapel Oxford Limited | Oxford | 2004 |
| Calvary Chapel Southampton Limited | Southampton | 2009 |
| Calvary Chapel Twickenham Limited | Hampton | 2002 |
| Calvary Chapel Warrington | Conwy | 2011 |
| Calvary Chapel Woolacombe Limited | Woolacombe | 2004 |
| Calvary Charismatic Baptist Church | London | 2006 |
| Calvary Charismatic Centre UK Limited | Horley | 2026 |
| Calvary Church (Haverfordwest) | Pembrokeshire | 2013 |
| Calvary Cross Apostolic Faith Ministries | London | 2011 |
| Calvary Evangelistic Ministry Birmingham Ltd | Birmingham | 2015 |
| Calvary Outreach Ministries Worldwide | Eastbourne | 2002 |
| Calvary Place Ltd | Milton Keynes | 2025 |
| Calvary South Lakes Limited | Kendal | 2008 |
| Calveo Ltd | Oakham | 2018 |
| Calvert&Muldo Ltd | Bradford | 2026 |
| Calverton & District Funeral Service Limited | Nottingham | 2023 |
| Calvin Hill Ltd | London | 2020 |
| Calvin Thomas Limited | Southall | 2022 |
| Calvine Solutions Ltd | Dudley | 2016 |
| Calvinkmusic Limited | Milton Keynes | 2021 |
| Calypso International Limited | Glasgow | 2019 |
| Calypso Restaurant Limited | Blackburn | 2011 |
| Calyx Music Limited | | 2007 |
| CAM Advisory Ltd | London | 2024 |
| CAM Automotive Ltd | Liverpool | 2017 |
| CAM Baber Ltd | Manchester | 2025 |
| CAM Beauty Ltd | Worksop | 2024 |
| CAM Consultancy (Scotland) Limited | Motherwell | 2024 |
| CAM Electrical Services (Scotland) Ltd. | Glasgow | 2017 |
| CAM Estates | Manchester | 2014 |
| CAM Football Ltd | Belfast | 2025 |
| CAM Hair Limited | Rotherham | 2020 |
| CAM TAN Limited | Bar Hill | 2026 |
| CAM Ventures Limited | Carnoustie | 2021 |
| Cam's Dog Club Ltd | Ely | 2023 |
| Camara Barber Shop Ltd | Liverpool | 2026 |
| Camari Consulting Ltd | London | 2019 |
| Camari Enterprise Limited | Leicester | 2019 |
| Camasu Ltd | Windsor | 2019 |