| NNY22 Limited | Real estate | 2022 |
| NO Worries (Property) Limited | Real estate | 2017 |
| Noah's Family CIC | Education | 2024 |
| Nola Capital Limited | Real estate | 2025 |
| Nola Ventures Limited | Professional & scientific | 2019 |
| Nonex Management Ltd | Professional & scientific | 2022 |
| Nordaly Development Ltd | Construction | 2026 |
| Norman a Steven Ltd | Professional & scientific | 2011 |
| North South Windows Ltd | Construction | 2022 |
| Northfield Farm Mews Residents Limited | Real estate | 2003 |
| Northgate Advisers Limited | Professional & scientific | 2022 |
| Notre Dame School Cobham | Education | 1999 |
| Nour Real Estate Ltd. | Real estate | 2021 |
| Novaris Consulting Limited | Professional & scientific | 2026 |
| Novel Nook Emporium Limited | Wholesale & retail | 2024 |
| Number 2 Eaton Place Limited | Households | 1989 |
| Nutrichem Ventures Limited | Wholesale & retail | 2017 |
| Nutritional Bioscience Limited | Health & social care | 2004 |
| NX Fishing Alarms Limited | Wholesale & retail | 2023 |
| NZH (London) Limited | Arts & recreation | 2018 |
| O2VIE Ltd | Professional & scientific | 2002 |
| Oak Tree Kindergarten Limited | Education | 2002 |
| Oasis Capital Heritage Ltd | Financial services | 2025 |
| Oasis Charity Limited | Health & social care | 1996 |
| Obelisk Digital Ltd | Information & communication | 2022 |
| Occam Partners Limited | Administrative & support | 2021 |
| Ocean Real Estate Limited | Real estate | 2020 |
| Old Dog Books Ltd | Information & communication | 2016 |
| Olga Salodini Ltd | Health & social care | 2024 |
| Olgra Limited | Real estate | 1989 |
| Oliver Court Consulting Ltd | Professional & scientific | 2022 |
| Ollenotna Limited | Arts & recreation | 2023 |
| OM7 Invest Limited | Real estate | 2026 |
| OM7 Promotions Limited | Arts & recreation | 2025 |
| Omco & Partners Limited | Professional & scientific | 2017 |
| Omniventure Limited | Wholesale & retail | 2001 |
| Omniversal Ltd | Extraterritorial | 2012 |
| OMS Consulting Ltd | Professional & scientific | 1998 |
| One OFF Originals Ltd | Professional & scientific | 2021 |
| One Specialist Clinics Ltd | Health & social care | 2023 |
| One Stop Design and Construction Ltd | Construction | 2010 |
| One Tower Bridge Limited | Extraterritorial | 2003 |
| Onereg Group Limited | Administrative & support | 2024 |
| Oneshot Filming Limited | Professional & scientific | 2016 |
| Onko AI Ltd | Information & communication | 2025 |
| Onko Limited | Information & communication | 2023 |
| Opal & Co Consulting Limited | Professional & scientific | 2016 |
| OPH Associates Ltd | Professional & scientific | 2011 |
| Orange Consultant Ltd | Professional & scientific | 2023 |
| Orbis Capital Limited | Financial services | 2001 |
| Orbital Veterinary Services Limited | Professional & scientific | 2021 |
| Origin X Performance Limited | Wholesale & retail | 2019 |
| Orion Delta Technologies Limited | Professional & scientific | 2024 |
| Oscm Investments Limited | Real estate | 2020 |
| Oscm Limited | Other services | 2013 |
| Ossie Holdings Limited | Real estate | 2021 |
| Ostley P.J. Limited | Construction | 1965 |
| OTB Creative Productions Limited | Other services | 2024 |
| Outpost International Limited | Financial services | 2023 |
| Outpost Property Ltd | Construction | 2013 |
| Overcroft Building and Landscaping Limited | Administrative & support | 2019 |
| Oxberry Limited | Information & communication | 1999 |
| Oxshott Fencing Ltd | Construction | 2020 |
| Oxshott Way Residents Association Ltd | Households | 1965 |
| OYR Properties Limited | Real estate | 2025 |
| Ozzie Limited | Arts & recreation | 2024 |
| P G Foam Supplies Limited | Manufacturing | 2007 |
| P&M Davies Limited | Other services | 2020 |
| Padanja Limited | Professional & scientific | 2012 |
| Painshill Enterprises Limited | Real estate | 1998 |
| Painshill Park Trust Limited | Education | 1981 |
| Papa Oaks Limited | Administrative & support | 2017 |
| Paramount Apartments Management Limited | Households | 1999 |
| Parkside School Trading Company Limited | Education | 2015 |
| Parkside School Trust | Education | 1960 |
| Parsons & Stewart Limited | Real estate | 1940 |
| Patho-Medical Advisory Ltd | Health & social care | 2015 |
| Patricia Christie Galleries Ltd. | Wholesale & retail | 2016 |
| Patrig Limited | Construction | 1998 |
| Paul Heasman Stunts Ltd | Arts & recreation | 2016 |
| Paul Sheppard Limited | Construction | 2009 |
| Payednow Limited | Financial services | 2012 |
| Paytech Umbrella Limited | Administrative & support | 2023 |
| PC Resq Limited | Wholesale & retail | 2002 |
| Pearce Thomas Consulting Limited | Administrative & support | 2023 |
| Pebble & Co Limited | Professional & scientific | 2012 |
| PEL Investments Limited | Real estate | 2006 |
| Pelham Investment & Property PLC | Financial services | 1990 |
| Pencilweight Limited | Professional & scientific | 2008 |
| Penn Gardens Properties LLP | | 2025 |
| Penpoll Limited | Financial services | 2021 |
| Pentacle Technologies Ltd | Information & communication | 2021 |
| People & Policy Global Advisory Ltd | Administrative & support | 2025 |
| People Vision Ltd. | Administrative & support | 2001 |
| Peperoncino Ltd | Wholesale & retail | 2026 |
| Percy's Folly Limited | Hospitality | 2026 |
| Personalised Intelligence Limited | Information & communication | 2025 |
| Pesleporem Ltd | Administrative & support | 2019 |
| Petrol Legends Limited | Wholesale & retail | 2026 |
| Pflaumenkuchen LLP | | 2022 |