| OGR T&T Property Holdings Ltd | Real estate | 2025 |
| OH My Grazee Limited | Hospitality | 2025 |
| Ohblodi Oblodah Ltd | Real estate | 2018 |
| Ohlssons Fine Food Ltd | Hospitality | 2026 |
| Oliveira Hair Limited | Other services | 2016 |
| Oliver Poyotte Holdings Ltd | Other services | 2022 |
| Olloo Limited | Information & communication | 2026 |
| Omega Properties Kent (UK) Limited | Real estate | 2024 |
| ON the Square Masonic Regalia Ltd | Wholesale & retail | 2018 |
| One 2 Watch Coaching Limited | Education | 2021 |
| One Roof Essentials Limited | Wholesale & retail | 2025 |
| One Shot Systems Limited | Wholesale & retail | 2024 |
| Onlime Group Limited | Financial services | 2008 |
| Onlime UK Limited | Wholesale & retail | 2012 |
| Online Auth Office Limited | Wholesale & retail | 2025 |
| Only Fools and Haulage Ltd | Transport & logistics | 2026 |
| OR Sports Limited | Arts & recreation | 2023 |
| Oral Hygiene Matters Limited | Health & social care | 2024 |
| Orbit Imports/Exports Limited | Transport & logistics | 1998 |
| Orbitnet Limited | Professional & scientific | 2023 |
| Ordinary People Limited | Administrative & support | 1988 |
| Oreon DG Ltd | Other services | 2019 |
| Organizedkaoscrew Ltd | Arts & recreation | 2025 |
| Orion Plumbing and Heating Limited | Extraterritorial | 2008 |
| Orloff. K Ltd | Administrative & support | 2016 |
| Osborne & What C.I.C. | Arts & recreation | 2018 |
| OUR Curated Abode Ltd | Wholesale & retail | 2024 |
| OUR Life Ltd | Extraterritorial | 2006 |
| Outcast 2 Ltd | Agriculture & fishing | 2014 |
| Outcome Vectors Ltd | Professional & scientific | 2025 |
| Outlet One Limited | Wholesale & retail | 2014 |
| Outpost Thanet Ltd | Wholesale & retail | 2025 |
| Ovalsport (Southern) Ltd | Arts & recreation | 2019 |
| Owen Property Group Ltd | Real estate | 2022 |
| Oyster Buoys Limited | Wholesale & retail | 2023 |
| Ozlk IT Ltd | Information & communication | 2023 |
| Ozlk Ltd | Real estate | 2023 |
| P W Adaptions Limited | Construction | 2018 |
| P Wave Medical Ltd | Health & social care | 2017 |
| P&Gc Ltd | Real estate | 2022 |
| P&K Financial Limited | Financial services | 2024 |
| P&P Electrical Installation Services Limited | Construction | 2010 |
| P&T Aero Limited | Manufacturing | 2019 |
| P. & M. Brill Limited | Wholesale & retail | 1976 |
| P.B.J Creative Services Ltd | Arts & recreation | 2024 |
| P17 Quality Builders Ltd | Construction | 2016 |
| Pacific Drift Ltd | Wholesale & retail | 2024 |
| Padfield Master Thatchers Ltd | Construction | 2011 |
| Page & Sons Wine Merchants Ltd | Wholesale & retail | 2024 |
| Palm Bay Court Freehold Co Limited | Households | 2006 |
| Palmer Construction (Kent) Ltd | Construction | 2014 |
| Pamwe Ltd | Professional & scientific | 2022 |
| Pandago Limited | Other services | 2022 |
| Pando Ltd | Wholesale & retail | 2024 |
| Papa George Ltd | Hospitality | 2019 |
| Pappillon Limited | Information & communication | 1993 |
| PAR Global | Other services | 2022 |
| Paramour Properties Ltd | Real estate | 2016 |
| Park Road Freehold Ltd | Households | 2022 |
| Partner to Success Ltd | Wholesale & retail | 2018 |
| Partners SA Ltd | Real estate | 2019 |
| Party Essentials Ltd | Wholesale & retail | 2025 |
| Passive Fire Solutions Kent Ltd | Professional & scientific | 2023 |
| Pathway Specialist Care Limited | Administrative & support | 2024 |
| Patrickgeorge Limited | Information & communication | 2009 |
| Patriot Projects Ltd | Professional & scientific | 2021 |
| Patrol & Response Limited | Administrative & support | 2024 |
| Patron Housing Solutions Ltd | Hospitality | 2022 |
| Paul Ashley Group Ltd | Wholesale & retail | 2019 |
| Paul Carr Plastering Limited | Construction | 2020 |
| Paxillum Limited | Information & communication | 2022 |
| Paxton Corporate Limited | Transport & logistics | 2016 |
| PB Property Projects Ltd | Real estate | 2021 |
| PBE Contracts Limited | Construction | 2024 |
| PBR Streetgang Limited | Information & communication | 2014 |
| PCM Groundworks Ltd | Construction | 2020 |
| PCP Web Design Ltd | Information & communication | 2017 |
| PD Building (Kent) Ltd | Construction | 2022 |
| Peaches&Pebbles Ltd | Wholesale & retail | 2026 |
| Peachypeanut Ltd | Wholesale & retail | 2025 |
| Pedro's Peri Peri Ltd | Hospitality | 2020 |
| Peewee’S Bar and Entertainment Ltd | Hospitality | 2025 |
| Pegwell & District Association | Administrative & support | 1987 |
| Pegwell Construction Ltd | Construction | 2018 |
| Pegwell Management Ltd | Households | 2009 |
| Penelope Ramsgate Ltd | Hospitality | 2023 |
| Penny's Property Services Limited | Construction | 2021 |
| Penvale Transport Limited | Transport & logistics | 1998 |
| Peoplelink Coaching Limited | Professional & scientific | 2005 |
| Persona Properties Ltd | Real estate | 2011 |
| Perspectiva Advisory Limited | Professional & scientific | 2023 |
| Peter Hodgman Properties Limited | Administrative & support | 2014 |
| Peter Newman Electrical Ltd | Construction | 2024 |
| Pets NOW Ltd. | Professional & scientific | 2018 |
| Petticoat Lane Emporium (Ramsgate) Ltd | Administrative & support | 2026 |
| Petticoat Lane Emporium Limited | Administrative & support | 2014 |
| Pettit Construction Management Ltd | Construction | 2014 |
| Pettit Contracting (South East) Ltd | Construction | 2015 |
| Philpott Construction & Developments Limited | Real estate | 2000 |
| Phirefly Group Ltd | Professional & scientific | 2022 |