| Cromwell House Freehold Limited | Households | 2020 |
| Cromwell Management Company (Staines) Limited | Households | 2008 |
| Ctrl ALT Lite Limited | Information & communication | 2016 |
| Cussens Limited | Construction | 2012 |
| D. Lyons Heating & Plumbing Limited | Construction | 2014 |
| David Charles Associates Limited | Administrative & support | 2009 |
| DC Car Care Ltd | Wholesale & retail | 2016 |
| Delta House Developments Limited | Real estate | 2021 |
| DES Couriers Ltd | Transport & logistics | 2023 |
| Detector Electronics Buyer UK Limited | Financial services | 2024 |
| DHS Fitness Ltd | Arts & recreation | 2024 |
| Diario Ltd | Wholesale & retail | 2015 |
| Didi Floor Shine Ltd | Other services | 2012 |
| Dobbins Property Ltd | Other services | 2020 |
| Domo Knows Limited | Other services | 2025 |
| Donjon Restored Limited | Financial services | 2007 |
| Dreamcatchers Arts Ltd | Arts & recreation | 2016 |
| Ealing Heating & Plumbing Limited | Administrative & support | 2010 |
| Eco Housing Development Services Limited | Construction | 2007 |
| Eden Professional Cleaning Services Limited | Administrative & support | 2008 |
| Edward Robert Saddlery Limited | Information & communication | 1998 |
| Ejaz Opticals Ltd | Health & social care | 2022 |
| Elwin Properties Limited | Real estate | 2012 |
| Emerald Financial Services Limited | Extraterritorial | 2006 |
| Endorse Media Ltd | Wholesale & retail | 2020 |
| Enovate Limited | Professional & scientific | 2020 |
| Euro Car Specialist Ltd | Wholesale & retail | 2012 |
| Euro Conexions Ltd | Construction | 2020 |
| Euro-City Eastern Limited | Extraterritorial | 2018 |
| Exhaust GAS Cleaning Systems Association | Other services | 2012 |
| FAB Cars Norwich Ltd | Wholesale & retail | 2012 |
| Facilities Consultancy Limited | Professional & scientific | 2009 |
| Faith's Walk Healthcare Services Ltd | Health & social care | 2019 |
| FDA Solicitors Limited | Professional & scientific | 2025 |
| Firstsafetysystemsuk Ltd | Professional & scientific | 2016 |
| Flexiway Limited | Arts & recreation | 2007 |
| Floppy Disk Media Ltd | Other services | 2020 |
| Foley Crash Repair Ltd | Wholesale & retail | 2023 |
| Folkeston Hill Residents Association Limited | Households | 1975 |
| Fuller Facilities Management Limited | Administrative & support | 2011 |
| G.G Refurbishment Ltd | Construction | 2016 |
| G8TECH Ltd | Manufacturing | 2019 |
| Gaja Restaurants Ltd | Hospitality | 2026 |
| Galesand Limited | Other services | 1983 |
| Geros Building Contractor Ltd | Construction | 2013 |
| Ginkgo Trading Limited | Manufacturing | 2010 |
| Glenamore Limited | Education | 2023 |
| Glenn Aviation Ltd | Transport & logistics | 2010 |
| Graceful Oaks Ltd | Health & social care | 2024 |
| Grayrose Construction Ltd | Construction | 2025 |
| Green Ayers Ltd | Hospitality | 2021 |
| Gregory Brown (Staines) Limited | Real estate | 2004 |
| Grovehouse Limited | Households | 2001 |
| GT Sound Limited | Information & communication | 2009 |
| Harban Services Ltd | Real estate | 2007 |
| Hare Enterprises Ltd | Transport & logistics | 2023 |
| Harvest Minds Limited | Wholesale & retail | 2025 |
| HB Hope Foundation | Professional & scientific | 2012 |
| Heathrow Animal Lounge Ltd | Other services | 2021 |
| Heathrow Body Repairs Limited | Wholesale & retail | 2024 |
| Help to Approve Ltd | Health & social care | 2019 |
| HSB Properties SPV Ltd | Real estate | 2014 |
| Hughes Bolckow Limited | Professional & scientific | 1926 |
| Hutchlam Services Limited | Information & communication | 2023 |
| Händler Autos Limited | Wholesale & retail | 2023 |
| IGS UK Group Ltd | Financial services | 2026 |
| Information Futures Limited | | 1981 |
| Infoweb Consulting Ltd | Information & communication | 2022 |
| Insight 2020 Limited | Real estate | 1999 |
| Insight Infosolutions Limited | Information & communication | 2015 |
| Inspiro Associates Limited | Professional & scientific | 2021 |
| Integra Neurosciences Limited | Manufacturing | 1986 |
| Isaac Xpress Ltd | Transport & logistics | 2020 |
| Island Close Mooring Management Limited | Households | 1979 |
| J C Slark Ltd | Construction | 2011 |
| J D Vehicle Services Limited | Wholesale & retail | 2008 |
| J.C. Handyside Limited | Construction | 1962 |
| J.Tims & Sons Limited | Real estate | 1958 |
| JA Farm Holdings Ltd | Financial services | 2024 |
| Jabal Enterprises Ltd | Wholesale & retail | 2022 |
| Jalmeza Limited | Construction | 2012 |
| JBS Lighting & Electrical Limited | Professional & scientific | 2008 |
| JD Air Conditioning Ltd | Energy | 2023 |
| JJT Environmental Limited | Manufacturing | 2005 |
| Joba Management Ltd | Professional & scientific | 2015 |
| John Woodbridge & Sons Limited | | 1984 |
| Jrizzy Group Limited | Information & communication | 2017 |
| JTH Contracts Limited | Professional & scientific | 2014 |
| Juniper Networks (Nominees) Limited | Information & communication | 2002 |
| Juniper Networks (UK) Limited | Information & communication | 1999 |
| K & N Sykes Limited | Construction | 2008 |
| Kabuli Korner Ltd | Hospitality | 2025 |
| KAS & Co Enterprises Ltd | Manufacturing | 2016 |
| Kastien Associates Limited | Real estate | 2012 |
| Kastien Ltd | Wholesale & retail | 2011 |
| Kawakn Ltd | Hospitality | 2022 |
| KC Tech PVT Ltd | Information & communication | 2019 |
| Keeling Strategic Management Ltd | Other services | 2012 |
| KEW Park Management Company Limited | Households | 1978 |
| Kids Klobber Limited | Transport & logistics | 1991 |