| HOE Lane (Block F) Management Company Limited | Households | 1990 |
| HOE Lane (Block H) Management Company Limited | Households | 1990 |
| Holbrook Investments Limited | Real estate | 2003 |
| Hotspur Wood NO. 1 Residents Company Limited | Households | 1987 |
| I Z P O Investments Ltd | Administrative & support | 2020 |
| Icknield Way (a) Management Company Limited | Households | 1989 |
| Icknield Way (B) Management Company Limited | Households | 1989 |
| Iglyfrog Media Ltd | Information & communication | 2014 |
| Imperium Consultancy Limited | Information & communication | 2018 |
| IN 2 Clean Limited | Other services | 2002 |
| Industrial Steel Trading Limited | Wholesale & retail | 2015 |
| Iruminate Limited | Health & social care | 2024 |
| Isle of Wight Consultancy Services Ltd | Real estate | 2022 |
| Istitch Ltd | Other services | 2016 |
| J C Electrical (UK) Limited | Construction | 2005 |
| J Kaplan Journalism Limited | Administrative & support | 2000 |
| J T Logistics Limited | Transport & logistics | 2012 |
| J. M. K. Associates Ltd | Administrative & support | 1995 |
| Jag-Pl Ltd | Real estate | 2012 |
| Janlight Limited | Information & communication | 2018 |
| Jass Properties Limited | Wholesale & retail | 2003 |
| JC Electrical (Holdings) Ltd | Administrative & support | 2020 |
| Jcoss Construction Limited | Construction | 2008 |
| Jcoss Sports Limited | Arts & recreation | 2008 |
| Joanna Morgan Limited | Arts & recreation | 2025 |
| Just ADD Water Limited | Wholesale & retail | 2005 |
| Just BRI Ltd | Health & social care | 2014 |
| Kingsclere Court Freehold Limited | Real estate | 2023 |
| KK Assets Ltd | Real estate | 2019 |
| Knebworth Close Management Limited | Real estate | 2006 |
| L.R.Butlin Limited | Real estate | 1947 |
| Lancaster London Ltd | Real estate | 2006 |
| Landlord Services Limited | Households | 2009 |
| Landmark Asset Management Limited | Real estate | 2005 |
| Landmark Property Holdings Limited | Financial services | 2005 |
| Larkswood Court Management Company Limited | Households | 1985 |
| Lawrence House(Palmerston Road)Management Company Limited | Households | 1965 |
| Learninvestment.Online. Limited | Education | 2023 |
| Leaside Holdings Limited | Financial services | 2004 |
| Lighthouse Audio Visual Light and Sound Ltd | Wholesale & retail | 2015 |
| Limitededition London Limited | Administrative & support | 2008 |
| Lion Road (Block B) Management Company Limited | Households | 1989 |
| Lion Road (Block C) Management Company Limited | Households | 1989 |
| Lipton Court Management Company Limited | Households | 1992 |
| LJB Advisory Solutions Limited | Professional & scientific | 2024 |
| Locksmith Solutions Limited | Manufacturing | 2020 |
| LTE International Ltd | Wholesale & retail | 2020 |
| Maincroft Limited | Professional & scientific | 2014 |
| Mapleleaf Court Management Company Limited | Households | 1988 |
| Mapps Enterprises Ltd | Wholesale & retail | 2014 |
| MD Systems Ltd | Wholesale & retail | 2017 |
| Megvip Ltd | Real estate | 2018 |
| Melita Flat Management Company Limited | Households | 1983 |
| Melling Drive (Enfield) Management Company Limited | Households | 2005 |
| Melling Drive (Enfield) Phase 2 Management Company Limited | Households | 2007 |
| Merton Lodge Property Limited | Households | 1984 |
| Meyers of London Limited | Professional & scientific | 2023 |
| Milton Court Residents Association (Cheshunt) Limited | Households | 1978 |
| Mornington Road (Block H) Management Company Limited | Households | 1990 |
| Mornington Road (Block K) Management Co. Limited | Households | 1991 |
| Mornington Road (Block L) Management Co. Limited | Households | 1991 |
| Mornington Road (Block M) Management Co. Limited | Households | 1991 |
| Mornington Road (Block N) Management Co. Limited | Households | 1991 |
| Mosaheb Properties Ltd | Real estate | 2022 |
| MR Filby Limited | Professional & scientific | 2010 |
| MRT Spice Ltd | Hospitality | 2025 |
| Mylands Properties Limited | Real estate | 2010 |
| Nail Mojo Ltd | Other services | 2015 |
| Namir Limited | Other services | 2010 |
| Nate and Nico Ltd | Professional & scientific | 2018 |
| Neharjun Technologies Limited | Information & communication | 2013 |
| New Barnet Community Association | Health & social care | 1998 |
| New Meadows Care Homes Limited | Health & social care | 2016 |
| Niren Blake Holdings Limited | Administrative & support | 1997 |
| Novak Hiles Architects Limited | Professional & scientific | 2017 |
| NP & US Accountants Ltd. | Professional & scientific | 2013 |
| NSV Investments Ltd | Real estate | 2018 |
| Nwcm Ltd | Construction | 2019 |
| Oakleigh Estates Ltd | Real estate | 2025 |
| Old Farm Avenue Management Company Limited | Households | 1990 |
| Orbit Resourcing Ltd. | Administrative & support | 2016 |
| Osborne Gardens Residents Ltd | Real estate | 2012 |
| Outsourced HR Solutions Limited | Professional & scientific | 2001 |
| Outstanding Lives Limited | Health & social care | 2012 |
| Parker Shine Window Cleaning Ltd | Administrative & support | 2023 |
| Parkers Commercial Cleaning Limited | Administrative & support | 2023 |
| Parkside Court (Cheshunt) Management Company Limited | Households | 1989 |
| Peakwillow Limited | | 1984 |
| Persatique Limited | Professional & scientific | 2017 |
| Peter Brown & Co, Solicitors LLP | | 2007 |
| Piguet Properties Limited | Real estate | 2013 |
| Pinner Electrical Limited | Construction | 2011 |
| Play and Record Limited | Arts & recreation | 2009 |
| Potters Road Corner Management Limited | Households | 2004 |
| Prebend Street Estate Management Company Limited | Households | 2001 |
| Precision Property Rentals Ltd | Real estate | 2020 |
| Professional Interim Partners Ltd | Professional & scientific | 2019 |
| Prosperity Wealth Creation LLP | | 2015 |
| QS Garage Ltd | Wholesale & retail | 2019 |
| Queen Anne's Place (Enfield) Residents Association Limited | Households | 1973 |