| Oakey Investments Property Ltd | Real estate | 2022 |
| Oaklea Homes (Hawkhurst) Ltd | Construction | 2025 |
| Oakstone Hospitality Ltd | Hospitality | 2025 |
| Oakwood (Tunbridge) Management Company Limited | Households | 1983 |
| Oast House Limited | Information & communication | 2016 |
| Oast Radio CIC | Information & communication | 2025 |
| Ocklye Holdings Limited | Financial services | 2025 |
| OEM Plus + Ltd | Wholesale & retail | 2020 |
| Office Staff Services Limited | Administrative & support | 2002 |
| Ofthejackel Ltd | Arts & recreation | 2025 |
| OJS Services Ltd | Construction | 2022 |
| Ollivier Investments Ltd | Real estate | 2024 |
| Omnia 46 Limited | Real estate | 2017 |
| Onari Daykomio Ltd | Arts & recreation | 2026 |
| One London House Ltd | Wholesale & retail | 2018 |
| One of Three Limited | Wholesale & retail | 2026 |
| Online Technology International Ltd. | Information & communication | 1997 |
| Online Technology Ltd | Information & communication | 2004 |
| Online Webtrix Limited | Wholesale & retail | 2020 |
| Onwatch (UK) Limited | Administrative & support | 2020 |
| OP Resilience Diary Ltd | Manufacturing | 2026 |
| Opalkobus Ltd | Manufacturing | 2023 |
| Optconsult Business Solutions Limited | Professional & scientific | 2022 |
| Optimum Accountants Limited | Professional & scientific | 2026 |
| Orbion Ltd | Information & communication | 2024 |
| Orchard Place (Crowborough) Management Company Limited | Households | 2006 |
| Orchid Hair Limited | Other services | 2008 |
| Orostream Air Conditioning Limited | Construction | 1984 |
| Orthobionic Limited | Health & social care | 2006 |
| OSI Trustees Limited | Financial services | 2020 |
| Otterford Park Ltd | Real estate | 2013 |
| OUR Wellnest Limited | Health & social care | 2025 |
| Oxted Building Services Limited | Information & communication | 2012 |
| P Brown Studios Limited | Arts & recreation | 2023 |
| P K Health Limited | Health & social care | 2009 |
| P&A Scaffolding Services Ltd | Construction | 2025 |
| Pabstunts and Training Ltd | Other services | 2013 |
| Pacr Ltd | Wholesale & retail | 2025 |
| Pact Holdings Limited | Professional & scientific | 1957 |
| Paice FM Limited | Manufacturing | 2026 |
| Pampa Kitchen & Grill Ltd | Hospitality | 2023 |
| Paper Properties Limited | Administrative & support | 2006 |
| Pappion Waters Ltd | Manufacturing | 2020 |
| Park Home Estates Limited | Construction | 2007 |
| Park Home Living Limited | Real estate | 2024 |
| Park Lifestyle Ltd | Construction | 2019 |
| Park Management Limited(The) | Hospitality | 1986 |
| Patina Sofas Manufacturing Ltd | Manufacturing | 2025 |
| Paul Bassett Carpets Ltd | Construction | 2015 |
| Paul Belither Consultancy Ltd | Professional & scientific | 2004 |
| Paul Molineux Associates Limited | Professional & scientific | 2012 |
| Paul Rensch Flooring Limited | Construction | 2018 |
| Pcfi Ltd | Construction | 2006 |
| Peelwilliams Limited | Professional & scientific | 2016 |
| Pelican Video Company Limited | Information & communication | 2005 |
| Pellings Farm Road Management Company Limited | Extraterritorial | 2008 |
| Penfold Driveways Ltd | Other services | 2020 |
| Penfold Surfacing Ltd | Construction | 2020 |
| Penfoldsdriveways Ltd | Construction | 2016 |
| Pensativo Investments Limited | Financial services | 2020 |
| Penshurst Fine Foods Limited | Wholesale & retail | 2002 |
| Perfect Daily Grind Limited | Information & communication | 2015 |
| Perfection Engineering Services Ltd | Professional & scientific | 2019 |
| Peter Croker Limited | Information & communication | 2008 |
| Peter Uttridge & Company Limited | Administrative & support | 1995 |
| Pevensey Programming Limited | Professional & scientific | 1992 |
| PHD Property Limited | Construction | 2016 |
| Phoenix Law Limited | Professional & scientific | 2016 |
| Physiotherapy on the Green Ltd | Health & social care | 2025 |
| PIC UPS Ltd | Hospitality | 2025 |
| Picture Projects Limited | Information & communication | 2011 |
| Pines Development Management Ltd | Households | 2019 |
| Pinkygray Ltd | Manufacturing | 2018 |
| Pioneer Heating & Plumbing Ltd | Construction | 2024 |
| Pioneering Childrens Services Limited | Health & social care | 2011 |
| Pistorum Consulting Limited | Information & communication | 2013 |
| Pixywalls Limited | Manufacturing | 2020 |
| Pizzadoughuk Ltd | Manufacturing | 2026 |
| PJL Healthcare Limited | Health & social care | 2006 |
| Plan a Landscaping and Construction Ltd | Construction | 2023 |
| Plastic EGG Limited | Administrative & support | 2010 |
| Platinum Premium Housing Ltd | Real estate | 2025 |
| Playpress Toys Ltd | Manufacturing | 2016 |
| Plumb and Power Ltd | Construction | 2020 |
| PM Etna Ltd | Hospitality | 2026 |
| Polforests Limited | Wholesale & retail | 1984 |
| Poppyviolet Limited | Information & communication | 2016 |
| Posh of Eastbourne Limited | Wholesale & retail | 2013 |
| Poulter FX Limited | Information & communication | 2022 |
| Powerglow Renewables Limited | Construction | 2023 |
| Precision Plumbing & Heating Ltd | Construction | 2020 |
| Premico Ltd | Wholesale & retail | 2025 |
| Premier Christian Communications Ltd | Information & communication | 1993 |
| Premier Christian Media Trust | Other services | 1983 |
| Premier Events MJ Limited | Arts & recreation | 2026 |
| Preservatim (Southern) Ltd | Construction | 2007 |
| Press Systems Limited | Manufacturing | 2019 |
| Prestige American Cars Limited | Wholesale & retail | 2005 |
| Prestige Contractors (TW) Ltd | Construction | 2014 |
| Prestige Holdings Limited | Financial services | 2019 |