| Calida Beauty Ltd | London | 2016 |
| California Collection Limited | Scunthorpe | 2021 |
| California Court Residents Association Limited | London | 1966 |
| California Dog Walking Ltd | Falkirk | 2026 |
| California Nail Fashion Ltd | London | 2018 |
| California Nails and Beauty Ltd | Atherton | 2021 |
| California Nails Beauty Ltd | London | 2016 |
| California Nails Derby Ltd | London | 2021 |
| California Nails Keynsham Limited | Bristol | 2019 |
| California Nails TD Ltd | Derby | 2026 |
| California TAN 2 Ltd | High Wycombe | 2022 |
| Californian Beehive Limited | Reading | 2025 |
| Caligari Massage Ltd | Brighton | 2019 |
| Caligor Opco UK, Ltd | London | 2016 |
| Caligri Limited | London | 2026 |
| Calimathi GSD Limited | Boston | 2019 |
| Calini Ltd | Ruislip, | 2025 |
| Calinsrealhair Ltd | London | 2020 |
| Calista Beauty and Care Ltd | Harrow | 2024 |
| Calista Beauty Ltd | Harrow | 2012 |
| Calista C Limited | Stockton-On-Tees | 2025 |
| Calisthenics UK Limited | London | 2017 |
| Calistro Consultants Limited | Wolverhampton | 1979 |
| Calite Limited | Walsall | 2015 |
| Calithea Studios Limited | Glasgow | 2024 |
| Calken Limited | Laurencekirk | 2010 |
| Calkramer Ltd | London | 2026 |
| Call & Hire Ltd | Barnet | 2016 |
| Call a CUT Ltd | Brentwood | 2021 |
| Call Assistance Ltd | Greenock | 2022 |
| Call First Cleaning Limited | Sutton Coldfield | 2011 |
| Call Gula Services Ltd | St Helens | 2018 |
| Call Magic Ltd | London | 2020 |
| Call ME AL Limited | London | 2024 |
| Call MR FIX IT Limited | Lincoln | 2025 |
| Call of Beauty Cosmetics Ltd | Telford | 2020 |
| Call the Computer GUY Limited | Bradford | 2012 |
| CALL-4-BEAUTY Ltd | Manchester | 2025 |
| Call-A-Skip (U.K.) Limited | Nechells | 1992 |
| Callabrea Ltd | Breich | 2024 |
| Callahan Investments | Edinburgh | 2022 |
| Callalilly Ltd | Waltham Abbey | 2018 |
| Callamia Property Investments Ltd | Reigate | 2020 |
| Callan & Lines Ltd | Glasgow | 2011 |
| Callan Elizabeth Ltd | London | 2026 |
| Callanan Art Advisory Ltd | London | 2022 |
| Callanan Conservation and Restoration Ltd | London | 2018 |
| Callander Community Development Trust Ltd | Callander | 2003 |
| Callander Nails & Spa Ltd | Callander | 2025 |
| Callanetics Scotland Ltd | Edinburgh | 2010 |
| Called OUT Ministry Ltd | Tipton | 2024 |
| Callendar Holdings Ltd. | Falkirk | 2019 |
| Callender Hairdressers Ltd | East Kilbride | 2012 |
| Callestick Caravan Storage Ltd | Truro | 2004 |
| Calleva Ingredients Limited | Bridgwater | 2013 |
| Callexa Limited | Denby | 2011 |
| Calley Thumpston Ltd | Hinckley | 2024 |
| Callfix AI Ltd | Bournemouth | 2025 |
| Callgate Networks Limited | Dagenham | 2015 |
| Calliam Limited | Peterhead | 2012 |
| Callidora Ltd | Hamilton | 2026 |
| Callidus Investments (UK) Limited | London | 2025 |
| Callidus Venture Limited | London | 2015 |
| Callidy Ltd | London | 2021 |
| Callie ANN Lashes and Brows Limited | Bournemouth | 2020 |
| Callie Day Aesthetics Ltd | East Grinstead | 2026 |
| Callie's Crystal Scents Ltd | Wishaw | 2022 |
| Calligram Music Ltd | London | 2022 |
| Calligraph Ltd | London | 2023 |
| Calligraphy UK Limited | Birmingham | 2004 |
| Callin Watch Care Ltd | Bournemouth | 2025 |
| Calling IT Back Ltd | London | 2024 |
| Calliope at Work Limited | Chippenham | 2020 |
| Calliope Persephone Grahame T/A C.P. Grahame Ltd | Widnes | 2020 |
| Callisto Wealth Management Limited | London | 2011 |
| Calljohan Ltd | Newbury | 2024 |
| Callmepale Ltd | Westerham | 2014 |
| Callswift Limited | Leigh-On-Sea | 1993 |
| Callum Ilott Promotions Limited | Saffron Walden | 2015 |
| Callum Rooney Welding Services Limited | Hebburn | 2014 |
| Callum Sign Solutions Limited | West Wickham | 1998 |
| Callum Stewart Coaching Ltd | London | 2022 |
| Callumn Fabrications Ltd | Glasgow | 2024 |
| Callumyoungcoaching Ltd | New Malden | 2025 |
| Callure Well-Being & Fitness Ltd | Birmingham | 2025 |
| Cally Aesthetics Limited | Great Yarmouth | 2026 |
| Cally Borg Limited | Reigate | 2008 |
| Cally Nails Ltd | London | 2013 |
| Calm and Chaos Ltd | Cowes | 2024 |
| Calm Beverages Limited | Wilmslow | 2019 |
| Calm Canine Connections Limited | Port Sunlight | 2018 |
| Calm Complexions Ltd | Southport | 2025 |
| Calm Counselling Limited | Westerham | 2020 |
| Calm Down Calm Down Limited | Manchester | 2014 |
| Calm Frequency Co Limited | Leigh | 2026 |
| Calm Hair and Beauty Limited | West Linton | 2013 |
| Calm Health and Beauty Ltd | Stockton On Tees | 2015 |
| Calm in East Durham CIC | Durham | 2019 |
| Calm Kids Corner Ltd | Greenock | 2024 |
| Calm Lifestyle Limited | Liverpool | 2021 |