| Jmtn Ltd | Professional & scientific | 2022 |
| Joemat Limited | Health & social care | 2011 |
| JR Environmental Limited | Water & waste | 2023 |
| JST Aviation Ltd | Professional & scientific | 2021 |
| JTS Civil Engineers Ltd | Construction | 2004 |
| Julia Williams Bookkeeping & Payroll Limited | Professional & scientific | 2013 |
| Kariba Solutions Limited | Manufacturing | 2003 |
| Kerbobble Ltd | Information & communication | 2019 |
| Kinland Design Ltd | Professional & scientific | 2019 |
| Knight-Davis Associates LLP | | 2011 |
| Knockring Ltd | Manufacturing | 2025 |
| L & J Air Conditioning Ltd | Energy | 2024 |
| L G Wood Digital Limited | Construction | 2023 |
| L G Wood Ltd | Construction | 2010 |
| L'Abri Fellowship | Education | 1967 |
| Langcroft Limited | Real estate | 2016 |
| Langrish Grove Management Company Ltd | Households | 2025 |
| Lapis Moon Property Investments Ltd | Construction | 2023 |
| Larbey Landscapes Limited | Administrative & support | 2006 |
| Laxram Retail Ltd | Wholesale & retail | 2025 |
| LC Courtyard Company Ltd | Real estate | 2015 |
| LE Court Management Limited | Real estate | 2010 |
| Legend Traditional Barbershop Ltd | Other services | 2023 |
| Lenslife Limited | Professional & scientific | 2006 |
| Lintel Capital UK Advisors LLP | | 2016 |
| Liss Electrical Services Limited | Construction | 2012 |
| Liss Garden Machinery Ltd | Manufacturing | 2008 |
| Liss Yarns Ltd | Wholesale & retail | 2024 |
| Lisswood Management Company Limited | Households | 2003 |
| Lodge 25 Ltd | Financial services | 2025 |
| Lodge Racing Ltd | Arts & recreation | 2025 |
| London Doctors Consortium Ltd | Health & social care | 2025 |
| LRE Lighting and Heating Ltd | Construction | 2025 |
| Lucreative Business Services Limited | Professional & scientific | 2012 |
| M Design Works Ltd | Professional & scientific | 2023 |
| Maciver Maher Limited | Education | 2007 |
| Madison Fayre Limited | Wholesale & retail | 2002 |
| Mainline Scaffolding Limited | Construction | 2010 |
| Marcus Edward Furniture Ltd | Manufacturing | 2000 |
| Mark Winfield Consulting Ltd | Professional & scientific | 2020 |
| Marlpit Hill Properties Limited | Real estate | 1964 |
| Marmalada Ltd | Hospitality | 2025 |
| Marmalade Consultancy Ltd | Professional & scientific | 2018 |
| Marshall Services Limited | Other services | 2019 |
| Martin Leslie Speyers Limited | Extraterritorial | 2023 |
| Matrix Property Fund Management LLP | | 2003 |
| Matrix Property Management Limited | Real estate | 1998 |
| Matrix Simola Limited | Real estate | 2015 |
| Mclaren Consulting Limited | Professional & scientific | 2025 |
| MEC Holdings Limited | Real estate | 2023 |
| Meliora Finance Consulting Limited | Professional & scientific | 2023 |
| Mellwood Ltd | Hospitality | 2015 |
| Mentha Land Limited | Households | 1999 |
| Meridian Project Consulting Ltd | Information & communication | 2026 |
| MET Therm Windows Ltd | Construction | 2010 |
| Middleton Press Limited | Information & communication | 2015 |
| Mike Gurnell Associates Limited | Administrative & support | 1982 |
| Millfield Construction (2021) Ltd | Construction | 2021 |
| Mind the Windows Limited | Information & communication | 2021 |
| Minnow and Wolf Flowers Ltd | Wholesale & retail | 2022 |
| Mint Medical Limited | Health & social care | 1980 |
| Moneybench Ltd | Education | 2025 |
| Morrison Hall Ltd | Extraterritorial | 2009 |
| Morthotone Limited | Extraterritorial | 2017 |
| Moumachi UK Ltd | Hospitality | 2025 |
| NCA Leisure Ltd | Arts & recreation | 2011 |
| ND Aerospace Ltd | Professional & scientific | 2022 |
| NE Law Limited | Professional & scientific | 2021 |
| Nemorosa Creative Enterprises Ltd. | Manufacturing | 2025 |
| NHC Properties Limited | Real estate | 2003 |
| Nick Davis Limited | Other services | 1994 |
| Northern Line Films Limited | Information & communication | 2024 |
| Norton Farm Holdings Ltd | Real estate | 2025 |
| Nowdrive Distribution Limited | Transport & logistics | 2025 |
| NPW Services Limited | Water & waste | 2015 |
| Oaklands Consulting Limited | Professional & scientific | 2025 |
| Oink Limited | Professional & scientific | 2020 |
| Opie Gardens Ltd | Households | 2022 |
| Orpie Limited | Wholesale & retail | 2018 |
| Owen Catto Consulting Limited | Professional & scientific | 2017 |
| Ownfull Holdings Ltd | Financial services | 2025 |
| P & H Trustees Limited | Extraterritorial | 1994 |
| P and S Roofing Solutions Ltd | Construction | 2021 |
| P D O'Hanlon Limited | Administrative & support | 2007 |
| P&D Innovation Ltd | Information & communication | 2019 |
| Panoptikon Productions Ltd | Information & communication | 2024 |
| Paramount Developments Limited | Construction | 2016 |
| Partnership HR Ltd. | Administrative & support | 2017 |
| Party Population Ltd | Information & communication | 2002 |
| Paul Tracey Design Limited | Professional & scientific | 2017 |
| PBA Solutions (Landscape) Ltd | Water & waste | 1995 |
| Penfold's Woodland Contracting Ltd | Administrative & support | 2019 |
| Penfold's Woodland Management Ltd | Administrative & support | 2014 |
| Peregrine Falcon Properties Limited | Real estate | 2017 |
| Performance Design Limited | Professional & scientific | 2008 |
| Performancewise Limited | Wholesale & retail | 2015 |
| Peter Barton LLP | | 2012 |
| Phoenix Ascension Ltd | Health & social care | 2024 |
| Phoenix UP Limited | Wholesale & retail | 2023 |
| PIC a Lily Landscapes Limited | Administrative & support | 2021 |