| Cero Generation Holdings Italy Limited | London | 2019 |
| Cero Generation Holdings Poland Limited | London | 2020 |
| Cero Generation Holdings Spain Limited | London | 2018 |
| Cero Generation Holdings UK Limited | London | 2019 |
| Cero Generation Limited | London | 2019 |
| Cero Generation Services Limited | London | 2020 |
| Cero Global Limited | London | 2023 |
| Cero Holdings Ltd | Hitchin | 2026 |
| Ceros London Limited | Canterbury | 2025 |
| Cerro Torre Consulting Ltd | London | 2025 |
| Cert Property Group Limited | Manchester | 2018 |
| Cert. Insurance Group Limited | London | 2024 |
| Certa Insurance Partners Ltd | London | 2018 |
| Certa Partners Holdings Ltd | London | 2021 |
| Certa Private Finance Limited | Berkhamsted | 2020 |
| Certa Specialty Ltd | London | 2025 |
| Certain Bridge Limited | Tarporley | 2017 |
| Certain Enterprises Ltd | Feltham | 2017 |
| Certain Holdings Limited | Sittingbourne | 2002 |
| Certain Knowledge Limited | Llandudno | 2006 |
| Certain Notion Limited | London | 2023 |
| Certainboom Limited | London | 1988 |
| Certania Aquico-Uk Ltd | Hucknall | 2024 |
| Certek Consulting Ltd | Poole | 2000 |
| Certek Group Holdco Limited | London | 2024 |
| Certek Group Holdings Limited | London | 2024 |
| Certek Group Management Limited | London | 2024 |
| Certek Group Midco 1 Limited | London | 2024 |
| Certek Group Midco 2 Limited | London | 2024 |
| Certificial A1 Ltd | Bromley | 2025 |
| Certified Accountants Investment Company Limited | London | 1988 |
| Certified Claims Management Limited | High Wycombe | 2011 |
| Certified Protection Limited | Maidenhead | 2019 |
| Certify Bidco Limited | Lynchwood | 2026 |
| Certify Entertainment Ltd | London | 2018 |
| Certify Holdings Limited | Manchester | 2022 |
| Certify Topco Limited | Lynchwood | 2026 |
| Certifymyasset Ltd | Luton | 2026 |
| Certini (Holdings) Limited | Saltash | 2014 |
| Certini (Holdings) NO 2 Limited | Saltash | 2021 |
| Certo Group Limited | Preston | 2019 |
| Certora (2025) Limited | Chesterfield | 2025 |
| Certraq Ltd | Monmouth | 2018 |
| Certua Financial Information Services Limited | London | 2018 |
| Certua Group Limited | London | 2016 |
| Certua Life Limited | London | 2025 |
| Certua Protect Limited | London | 2017 |
| Certus Financial Planning Limited | Fareham | 2009 |
| Certus Generation Limited | Liverpool | 2019 |
| Certus Hub Limited | Liverpool | 2021 |
| Certus Legal Limited | Liverpool | 2019 |
| Certus Risk Management Limited | Peterborough | 2014 |
| Cerulean Finance NO.1 Limited | London | 2020 |
| Cerulean Investments Ltd | Liverpool | 2022 |
| Cerulean Shipholdings Limited | London | 2023 |
| Cerve Global Ltd | London | 2024 |
| Cervello Financial Planning Limited | Southend-On-Sea | 2011 |
| Cervello Holding Limited | London | 2015 |
| Cervus Creative Holdings Ltd | Lewes | 2025 |
| Cervus Holdings Group Ltd | Beaumont Avenue | 2025 |
| CES Financial Limited | Maldon | 2021 |
| CES Group Holdings Ltd | Hinckley | 2020 |
| CES Holdco Ltd | Ilkley | 2021 |
| CES Propco Ltd | Beckenham | 2020 |
| Cesa UK Holdings Limited | London | 2022 |
| Cesar International Ltd | Cambridge | 2026 |
| Cesl Holdings Ltd | Wendover | 2023 |
| Cesl Ltd | London | 2025 |
| Cessero Ltd | Hamilton | 2024 |
| Cessford Holdings Ltd | Redcar | 2023 |
| Cessna Holdings Limited | Coventry | 2023 |
| Cesta Financial Planning Ltd | London | 2024 |
| Cestrian Financial Planning Services Limited | | 1980 |
| Cestrian L & P (Trustees) Limited | Cheadle | 2010 |
| Cestrian Life & Pensions Limited | Cheshire | 2004 |
| Cesur Ventures Limited | London | 2018 |
| Ceta Insurance Ltd | Oxfordshire | 1993 |
| Cetacea Investments Limited | Burford | 2022 |
| Ceteris Consulting Ltd | Sutton | 2015 |
| Cetex Energy Limited | Surbiton | 2026 |
| Cetex.Online Ltd | London | 2018 |
| Ceth Limited | Birmingham | 2017 |
| Ceto Engineering Holdings Ltd | St. Neots | 2023 |
| Ceto Investment Limited | Orpington | 2022 |
| Cetra Limited | Borehamwood | 2015 |
| Cetrolinear Limited | Manchester | 2014 |
| Cetteca Ltd | Barrow-Upon-Humber | 2023 |
| CEV Holding Ltd | London | 2024 |
| CEVIAN55 Ltd | Newcastle Upon Tyne | 2016 |
| Ceviant Payments UK Limited | London | 2014 |
| CEW Holdings Ltd | London | 2017 |
| Cewero Holding Ltd. | London | 2016 |
| CEX HQ Ltd | Brentwood | 2020 |
| Cex.Io Markets UK Ltd | London | 2023 |
| Cexbuy Holdings Limited | St Albans | 2021 |
| Ceylon Media Limited | Borehamwood | 2014 |
| Ceyven Group Ltd | Withington | 2025 |
| CF Advisory Services Limited | Maidenhead | 1998 |
| CF Alloys Ltd | Droitwich | 2024 |
| CF Asset Finance Limited | London | 1999 |