| Optimised Energetics Limited | Wholesale & retail | 2011 |
| Optimum ITS Limited | Information & communication | 2009 |
| Optimum Social Ltd | Professional & scientific | 2021 |
| Optimus Distributions Ltd | Wholesale & retail | 2023 |
| Orbis Games Ltd | Arts & recreation | 2025 |
| Orbiworld Limited | Wholesale & retail | 2025 |
| Orca Pools Ltd | Construction | 2022 |
| Orchard Brook Wildlife Reserve Limited | Extraterritorial | 2024 |
| Orchard Carpentry & Construction Ltd | Construction | 2022 |
| Orchard Castle Services Ltd | Real estate | 2014 |
| Orchard Court (East Peckham) Residents Association Limited | Households | 1978 |
| Orchard Court (Tonbridge) Management Company Limited | Households | 2010 |
| Orchard Court Consultancy Limited | Professional & scientific | 2012 |
| Orchard Down Management Company Limited | Households | 2025 |
| Orchard Heights Management Company Limited | Households | 2016 |
| Orchard LEA Hildenborough Limited | Real estate | 2012 |
| Orchard Learning Academy Ltd | Education | 2026 |
| Orchard Place Farm Fishing Lakes Ltd. | Agriculture & fishing | 2009 |
| Orchard View Kent Ltd | Agriculture & fishing | 2026 |
| Orchestra Group (Europe) Limited | Professional & scientific | 2015 |
| Orchid Home Improvements Limited | Construction | 2024 |
| Oreo Star Limited | Health & social care | 2024 |
| Organic Village Market Limited | Wholesale & retail | 2015 |
| Origin Connect Ltd | Information & communication | 2025 |
| Original Holdings Management Ltd | Real estate | 2025 |
| Original Timber Limited | Manufacturing | 2013 |
| Orion Decorating South East Limited | Construction | 2010 |
| Orion Heating and Plumbing Limited | Construction | 2025 |
| Orion Maintenance Ltd | Construction | 2014 |
| Orrettgage Ltd | Wholesale & retail | 2026 |
| Orthofilms Ltd | Health & social care | 2023 |
| Orthopaedic Medicolegal Group Limited | Health & social care | 2026 |
| Osborne’S Windows Doors and Property Maintenance Ltd | Construction | 2025 |
| Oscar MEP Ltd | Professional & scientific | 2019 |
| Osmond Davis and Company Limited | Real estate | 1947 |
| Osmonds Environmental Limited | Water & waste | 2015 |
| Osteopaf Teale Limited | Health & social care | 2006 |
| Otero Door Specialists Limited | Construction | 2016 |
| Othello (UK) Limited | Financial services | 1996 |
| Otrprop Limited | Real estate | 2026 |
| Otto Dent Ltd | Health & social care | 2025 |
| Otto Health Group Ltd | Health & social care | 2025 |
| Otto Hearing Ltd | Wholesale & retail | 2025 |
| Otto MED Ltd | Health & social care | 2025 |
| Otto POD Ltd | Manufacturing | 2025 |
| Otto Sleep Clinic Ltd | Wholesale & retail | 2025 |
| Otto Vision Ltd | Health & social care | 2025 |
| OUR Friends in the Sky Limited | Professional & scientific | 2022 |
| Out-Of-The-Ordinary.Com Limited | Information & communication | 1977 |
| Outdoor Innovation Landscaping Limited | Administrative & support | 2016 |
| Outlaw Group Ltd | Wholesale & retail | 2024 |
| Outlook Construction Limited | Construction | 2017 |
| Overground Analytics Limited | Information & communication | 2016 |
| Overlord Consulting Limited | Information & communication | 2012 |
| Overton Training Ltd | Education | 2019 |
| Overy (Farms) Limited | Agriculture & fishing | 2009 |
| Owen I Miller Ltd | Health & social care | 2021 |
| OWL Real Estate Ltd | Real estate | 2024 |
| Own Your Crown Enterprises Ltd | Education | 2026 |
| Oxatis UK Limited | Administrative & support | 2011 |
| Oxney Property Developments Limited | Construction | 2025 |
| Oxon Cardiology Limited | Health & social care | 2021 |
| Ozrad Ltd | Health & social care | 2018 |
| Ozturk Tonbridge Limited | Hospitality | 2024 |
| P & J International Limited | Wholesale & retail | 2003 |
| P & P Scaffolding Ltd | Construction | 2011 |
| P & S Home Investments Limited | Real estate | 2024 |
| P a Plant Services Ltd | Administrative & support | 2018 |
| P Holden Architecture Ltd | Professional & scientific | 2021 |
| P J Constructions Ltd | Construction | 2003 |
| P J Electrical Limited | Construction | 1997 |
| P R Jenkins Limited | Construction | 1997 |
| P&F Cleaning Services Limited | Administrative & support | 2021 |
| P&J International Trading Ltd | Extraterritorial | 2022 |
| P&P Tax Advisors Limited | Professional & scientific | 2021 |
| P. Bennett Interiors Ltd | Construction | 2003 |
| P. Richardson Developments Limited | Construction | 1977 |
| P.K.P. Optics Limited | Administrative & support | 2004 |
| P.U.K.K.I Construction Limited | Construction | 2019 |
| P5 Chiropractic and Health Ltd | Health & social care | 2013 |
| PA Consultancy Limited | Professional & scientific | 2022 |
| Pace Legal Ltd | Professional & scientific | 2019 |
| Pacific Delta Ltd. | Real estate | 2002 |
| Pacific RIM Wood Limited | Wholesale & retail | 2005 |
| Pacific Solutions International Limited | Information & communication | 1995 |
| Pacific Solutions Limited | Extraterritorial | 2004 |
| Paddle Cabin Limited | Arts & recreation | 2020 |
| Paddock Wood Cards Limited | Wholesale & retail | 2024 |
| Paddock Wood Community Advice Centre | Other services | 2012 |
| Paddock Wood Community Centre Operations Limited | Real estate | 2022 |
| Paddock Wood Freemasons Hall Ltd | Other services | 1924 |
| Paddock Wood Garage Limited | Wholesale & retail | 1959 |
| Paddock Wood MOT Service & Repairs Ltd | Wholesale & retail | 2009 |
| Paddock Wood Pet Supplies Limited | Wholesale & retail | 2000 |
| Paddock Wood Podiatry Limited | Health & social care | 2023 |
| Paddock Wood Property Services | | 1991 |
| Paddock Wood Student Services Limited | Other services | 2016 |
| Paddock Wood Track Limited | Households | 2017 |
| Padel Society Ltd | Arts & recreation | 2025 |
| Padley Studio Architecture Ltd | Professional & scientific | 2025 |