| Cenc Bath Ltd | Hospitality | 2015 |
| Chameleon Property Company Limited | Construction | 2007 |
| Chapel Gate Construction Limited | Construction | 1972 |
| Chapman Agricultural Limited | Manufacturing | 2010 |
| Chapmans Garden Machinery Limited | Manufacturing | 2008 |
| Charlesworth Design and Marking Studio Limited | Administrative & support | 2022 |
| Charlie Makari Hairdressers Limited | Other services | 2003 |
| Charnwood Associates Limited | Professional & scientific | 2022 |
| Cheeky International Ltd | Information & communication | 2025 |
| Cherrywood Restaurants Limited | Hospitality | 1995 |
| CHM Airconditioning Ltd | Energy | 2023 |
| Choice Open Management Limited | Households | 2003 |
| Church Gate Residents Association (Whetstone) Limited | Real estate | 1988 |
| Cindigi Limited | Information & communication | 2010 |
| City Commercial Property Services Limited | Administrative & support | 2013 |
| Civil Communications Limited | Professional & scientific | 2013 |
| CJM Automation Ltd | Professional & scientific | 2014 |
| CKS (National) Limited | Administrative & support | 2016 |
| Classic House Investments Limited | Administrative & support | 2014 |
| Clearsound Alarms Limited | Administrative & support | 2000 |
| Cleke Limited | Administrative & support | 2017 |
| Clifton Foodservice Consultants Ltd | Professional & scientific | 2018 |
| Clip Around the Ears Ltd | Other services | 2018 |
| Clwyd Awpp Limited | Real estate | 2023 |
| Combat Clipper Company Ltd | Wholesale & retail | 2024 |
| Competitive Edge Design Ltd | Professional & scientific | 2003 |
| CONNECT2YOU Ltd | Professional & scientific | 2020 |
| Constituto Limited | Administrative & support | 2022 |
| Cooper London Developments Limited | Real estate | 2018 |
| Cosgrove Housing Limited | Real estate | 2021 |
| Court Capital Group Limited | Financial services | 2021 |
| Coyr Limited | Real estate | 2015 |
| Cranmere Limited | Education | 2005 |
| Creativenerds Ltd | Information & communication | 2012 |
| Crispin Industrial Developments Limited | Wholesale & retail | 1987 |
| CUBE23 Limited | Professional & scientific | 2019 |
| Cunnington & Co Limited | Professional & scientific | 2011 |
| D & C Real Estate Limited | Real estate | 2023 |
| D'Costa Consultants Limited | Professional & scientific | 2016 |
| D.Beeston Building Services Limited | Construction | 2001 |
| D.J.C. Nicholas Ltd | Construction | 2003 |
| Dalling Property Co Limited | Construction | 1955 |
| DAS Investments Ltd | Real estate | 2021 |
| David Fenton Design LLP | | 2017 |
| Davies-Goddard Limited | Manufacturing | 1979 |
| DBM Promotions Limited | Administrative & support | 2013 |
| Deedstar Limited | Other services | 2017 |
| Dessio Limited | Households | 1972 |
| Development One Hundred Limited | Real estate | 2021 |
| Devils Own Tattoo and Piercing Studio Limited | Extraterritorial | 2001 |
| Dewpool Holdings Limited | Real estate | 1948 |
| Diamond Red Limited | Construction | 2010 |
| Dirlton Limited | Professional & scientific | 1985 |
| DJI Promotions Limited | Other services | 2014 |
| DNP Investments London Ltd | Real estate | 2016 |
| DP Shopfitting Ltd | Construction | 2019 |
| DPL Accounting Ltd | Professional & scientific | 2018 |
| Drivers & Norris Ltd | Real estate | 1961 |
| DSI Communications Limited | Information & communication | 2009 |
| Dsjr Properties Ltd | Real estate | 2024 |
| E.R.L.S.A. Limited | | 1968 |
| Eagles Admin Limited | Real estate | 2024 |
| Earth Resources Solutions Limited | Other services | 2014 |
| Ebony Ambassadors CIC | Administrative & support | 2020 |
| Economides Consulting Limited | Health & social care | 2009 |
| Edge and Beyond Limited | Professional & scientific | 2021 |
| Ednare Ltd | Real estate | 2016 |
| Eleven Eleven Properties Ltd | Real estate | 2020 |
| Eoin Morgan Enterprises Limited | Other services | 2010 |
| ET ELM Estates Limited | Construction | 2024 |
| Etmr Community Interest Company | Health & social care | 2026 |
| Ever After Care Limited | Health & social care | 2024 |
| Evolve Community Ltd | Education | 2012 |
| EXO Property Limited | Construction | 2012 |
| Expedition Nomads Haven Limited | Hospitality | 2024 |
| F Ahmed Accountants Limited | Professional & scientific | 2026 |
| F. Bray & Sons (Leicester) Limited | Construction | 1972 |
| Fairy Thorn Limited | Professional & scientific | 2025 |
| Faye Francesca Consulting Ltd | Professional & scientific | 2014 |
| FBS - Services Limited | Transport & logistics | 2017 |
| Fernie Homes Limited | Construction | 2017 |
| Fernie Lettings Limited | Real estate | 2018 |
| Fernie Properties Limited | Real estate | 2016 |
| FG City Limited | Arts & recreation | 2003 |
| Filtration Service Engineering Limited | Manufacturing | 2026 |
| First Endeavour Management Ltd | Professional & scientific | 2019 |
| FJP Investment Ltd | Extraterritorial | 2013 |
| Flam Construction Limited | Construction | 2015 |
| Foley Management Limited | Real estate | 2016 |
| Fortune Hotel (UK) Limited | Hospitality | 2014 |
| Forty Five 90 Plus Ltd | Professional & scientific | 2025 |
| Four Packs Limited | Real estate | 2019 |
| Fourfields Properties Limited | Real estate | 2026 |
| Franco Capital Management Limited | Extraterritorial | 2014 |
| Frenchbubbles Limited | Wholesale & retail | 2008 |
| Friars Mill Holdings Limited | Financial services | 2021 |
| Friern Barnet Lane (Residents) Limited | Households | 1970 |
| Fruition Premier Ltd | Administrative & support | 2008 |
| FSE (Kidderminster) Ltd | Manufacturing | 2015 |
| FSE 1959 Limited | Manufacturing | 1959 |