| Jadak Holdings Ltd | Financial services | 2019 |
| James T Property Ltd | Construction | 2017 |
| JB Renovations (Reading) Limited | Construction | 2020 |
| JB Horticulture Ltd | Administrative & support | 2020 |
| Jeeves and Green Management Ltd | Construction | 2024 |
| Jkea Project Services Limited | Professional & scientific | 2009 |
| JL Scaffolding (Berkshire) Limited | Construction | 2022 |
| Jonnie Rocket Limited | Extraterritorial | 2009 |
| JP Auto-Tech Limited | Wholesale & retail | 2019 |
| JRW Commercial Consulting Limited | Professional & scientific | 2015 |
| JRW Technical Consulting Limited | Professional & scientific | 2023 |
| JSK Blue Limited | Arts & recreation | 2002 |
| Junior Learning Limited | Education | 2012 |
| Juniper Electronics Limited | Manufacturing | 2005 |
| Just Commercials Vehicle Repairs Ltd | Wholesale & retail | 2010 |
| Just Roof UK Limited | Construction | 2017 |
| K and D Care Services Limited | Health & social care | 2019 |
| K and S Hospitality Limited | Administrative & support | 2019 |
| K-9 Pamper Unit Ltd | Other services | 2015 |
| Kartals Property Limited | Real estate | 2000 |
| Katun U.K. Ltd. | Wholesale & retail | 1981 |
| King & Sons (Sandhurst) Limited | Wholesale & retail | 2001 |
| Kings DIY Tadley Limited | Wholesale & retail | 2007 |
| Kingsbridge a V Limited | Information & communication | 2002 |
| Kingsclere Management Company Limited | Administrative & support | 1978 |
| Knole Hill Management Company Limited | Real estate | 2013 |
| Kumba Group Ltd | Wholesale & retail | 2019 |
| Laken AI Limited | Information & communication | 2025 |
| Laona Holdings Ltd | Financial services | 2023 |
| Lapley Ltd | Financial services | 2024 |
| LE Bleu Framboise Limited | Households | 2019 |
| LE Gallez Surveys Ltd | Professional & scientific | 2022 |
| Lemlem Media Ltd | Arts & recreation | 2015 |
| Leverstock Motors Limited | Real estate | 1971 |
| Lifemarque Limited | Wholesale & retail | 1990 |
| Limangus Polo Limited | Arts & recreation | 2022 |
| Litewire Group Ltd | Professional & scientific | 2024 |
| London Condiment Co. Ltd | Manufacturing | 2011 |
| Louis & Elias Limited | Other services | 1998 |
| Lowes Management and Development Limited | Professional & scientific | 2009 |
| Lucky 7 Properties Limited | Real estate | 2021 |
| M B Plumbing Sandhurst Limited | Construction | 2020 |
| M Radford Electrical Limited | Manufacturing | 2024 |
| M.Grovic & Son,Limited | Wholesale & retail | 1943 |
| Mackenzie Crawford Real Estate Limited | Professional & scientific | 2016 |
| Magic Holidays Limited | Administrative & support | 2013 |
| Maris International Limited | Professional & scientific | 2001 |
| Mazoon's Holdings Limited | Households | 2018 |
| MCE Management Ltd | Professional & scientific | 2015 |
| MH Racing Ltd | Arts & recreation | 2021 |
| Mibscorp Limited | Professional & scientific | 2001 |
| Mike Golding Yachting Limited | Arts & recreation | 2009 |
| Moore Medical Practice Limited | Health & social care | 2011 |
| Multimedia Medicine Limited | Health & social care | 2001 |
| Murdocks Taxis Ltd | Transport & logistics | 2021 |
| Nationwide Property Investing Limited | Real estate | 2016 |
| NAZ Autos Limited | Manufacturing | 2019 |
| NEGOTIAT8 Solutions Ltd | Professional & scientific | 2018 |
| NET7 Services Ltd | Information & communication | 2016 |
| Neutra Rust Europe Limited | Administrative & support | 2005 |
| Neutra Rust International Limited | Professional & scientific | 2006 |
| Newgate International Limited | Administrative & support | 1989 |
| NJB Marketing Limited | Administrative & support | 2011 |
| Northcroft Farm Services Limited | Administrative & support | 2019 |
| NR Property Holdings Limited | Real estate | 2016 |
| NSN Vehicle Services Ltd | Wholesale & retail | 2025 |
| Odlin Group Ltd | Real estate | 2016 |
| Officegp Limited | Health & social care | 2014 |
| Oliver Thomas Consulting Ltd | Administrative & support | 2024 |
| OMT Holdings Ltd | Real estate | 2024 |
| Optimumageing Science Ltd | Wholesale & retail | 2022 |
| OTO 3D Limited | Manufacturing | 2003 |
| Overclifton Limited | Households | 2012 |
| P Jackson Building Services Ltd | Construction | 2006 |
| Parikos Properties Limited | Real estate | 2024 |
| Parking in Twickenham Ltd | Hospitality | 2014 |
| Partnerit Limited | Information & communication | 2010 |
| PAS Refurbishment Ltd | Manufacturing | 2016 |
| Pathway Pro Training Ltd | Education | 2024 |
| Pawsons Property Investment Limited | Real estate | 2021 |
| Peach Plant Hire Limited | Administrative & support | 2019 |
| Pedal on Limited | Wholesale & retail | 2014 |
| Peregrine Consultants Limited | Financial services | 2019 |
| Peripheral Vision (Technology) Limited | Manufacturing | 1991 |
| Pharmhe (UK) Ltd | Wholesale & retail | 2012 |
| Phillips Flavin Property Management LLP | | 2025 |
| Phillips Property Management Ltd | Real estate | 2019 |
| Phoenix Consulting Specialists Ltd | Professional & scientific | 2012 |
| Pilato UK Ltd | Extraterritorial | 2013 |
| Pilot Services Flying Group Limited | Administrative & support | 2007 |
| Pilot Services Limited | Transport & logistics | 2000 |
| Pineapple Property (Kent) Limited | Real estate | 2005 |
| Pingewood Coachworks Limited | Manufacturing | 2006 |
| PMD - Project Management Diversified Limited | Extraterritorial | 2022 |
| Pologistics Limited | Agriculture & fishing | 2024 |
| Portofino Charters Ltd | Extraterritorial | 2019 |
| Powerled (UK) Limited | Manufacturing | 2015 |
| Pro-Active UK Services 23 Limited | Education | 2023 |
| Pro-Active UK Services Ltd | Education | 2019 |
| Prosperity Financial Services Ltd | Financial services | 2004 |