| Onekindco Ltd | Manufacturing | 2025 |
| Online Digital Print Limited | Manufacturing | 2022 |
| Only Bridging 365 Limited | Financial services | 2020 |
| Optimised Installations Limited | Administrative & support | 2022 |
| Optyma (Holdings) Limited | Financial services | 2012 |
| Orbalco Limited | Information & communication | 2023 |
| Orchid Red Limited | Hospitality | 2024 |
| Oriental Arts & Design Limited | Wholesale & retail | 1998 |
| Oriental Chef 8 Limited | Hospitality | 2023 |
| Original Gourmet Limited | Hospitality | 2022 |
| Origine by KC Ltd | Wholesale & retail | 2024 |
| Orion Property Transformation Ltd | Construction | 2017 |
| Orion Real Estate Limited | Real estate | 2022 |
| Orlando Ivan Electrical Limited | Construction | 2018 |
| Orpington Properties Limited | Real estate | 2017 |
| Orthmed Ltd | Health & social care | 2016 |
| Osaka Management Services Ltd | Extraterritorial | 2025 |
| Osborne Preservation Limited | Construction | 2017 |
| Oteikwu Limited | Education | 2012 |
| OUR Mate Ltd | Arts & recreation | 2015 |
| OUR Restaurant Limited | Hospitality | 2009 |
| OUT of Hours Community CIC | Education | 2025 |
| Owesmemoney Ltd | Administrative & support | 2014 |
| P and P Retailer Limited | Wholesale & retail | 2025 |
| P B Hospitality Limited | Administrative & support | 2015 |
| P Haven Luxury Hair Limited | Wholesale & retail | 2025 |
| P Rika Ltd | Administrative & support | 2022 |
| P S Property Holdings Limited | Real estate | 2017 |
| P&J Electricals Ltd | Construction | 2008 |
| P&P 64 Ltd | Construction | 2016 |
| P.S. Agency Ltd | Professional & scientific | 2025 |
| Paagal Games Limited | Manufacturing | 2020 |
| Pablo Artisan Coffee Ltd | Manufacturing | 2024 |
| Pack Spark Ltd | Arts & recreation | 2025 |
| Pali Motors Limited | Wholesale & retail | 2016 |
| Pali Properties Limited | Real estate | 2021 |
| Palimore Ltd | Real estate | 2018 |
| Pannier Market Coffee House Ltd | Hospitality | 2025 |
| Pantiles Beauty Limited | Other services | 2019 |
| PAP 25 Ltd | Transport & logistics | 2022 |
| Papas Kitchen Maidstone Limited | Hospitality | 2025 |
| Papricity Ltd | Wholesale & retail | 2021 |
| Paragon Build Limited | Construction | 2020 |
| Paragon Invest Limited | Real estate | 2021 |
| Parentis Limited | Other services | 2019 |
| Parkmount Developments Ltd | Real estate | 2019 |
| Parkmount Group Ltd | Real estate | 2019 |
| Parky's Petals Ltd | Wholesale & retail | 2022 |
| Parris Residential Limited | Real estate | 2008 |
| Partnertex UK Ltd | Wholesale & retail | 2025 |
| Pasca Ltd | Construction | 2022 |
| Passion Cars Ltd | Wholesale & retail | 2020 |
| Pasya Motor Ltd | Transport & logistics | 2010 |
| Patisserie Bellaree Limited | Manufacturing | 2022 |
| Paul Puttick Limited | Information & communication | 2009 |
| Pave Logistics UK Limited | Transport & logistics | 2026 |
| Payall Limited | Financial services | 2022 |
| PBS Kent Ltd | Construction | 2006 |
| Pckstx Ltd | Arts & recreation | 2020 |
| Peckham RYE Properties Limited | Real estate | 2022 |
| Peculium Ltd | Real estate | 2020 |
| Peerless Consultant Limited | Administrative & support | 2011 |
| Peety Design Ltd | Professional & scientific | 2026 |
| Pegasus A/C Mechanical Ltd | Construction | 2017 |
| Penny Patrol Bookkeeping Ltd | Professional & scientific | 2020 |
| Perabytes Technologies Ltd | Information & communication | 2024 |
| Perfect Garage Doors Limited | Wholesale & retail | 2010 |
| Perfect Signs Limited | Manufacturing | 2015 |
| Perinat Interior Design Limited | Professional & scientific | 2014 |
| Perlin Holdings Ltd | Real estate | 2025 |
| Pero Ltd | Real estate | 2020 |
| Perspectiva Intelligence Limited | Professional & scientific | 2017 |
| PEST2CONTROL Limited | Administrative & support | 2020 |
| PGD Developments Ltd | Real estate | 2015 |
| PHA London Ltd | Wholesale & retail | 2021 |
| Pharmanour Aesthetics Ltd | Other services | 2025 |
| PHO 3 Mien Ltd | Hospitality | 2022 |
| Phoenix Construction South East Ltd | Construction | 2025 |
| Phoenix Sports Club (1982) Limited | Arts & recreation | 1982 |
| Phull Freedom Ltd | Real estate | 2020 |
| Pickloop Ltd | Wholesale & retail | 2025 |
| Pimpernel Clothing Limited | Wholesale & retail | 2014 |
| Pingold Limited | Real estate | 2016 |
| Pink Salad LDN Limited | Wholesale & retail | 2019 |
| Pippa Ailion and Natalie Gallacher Casting Limited | Administrative & support | 2026 |
| PJC Risk Management Services Ltd | Financial services | 2016 |
| PJD Services Ltd | Manufacturing | 2022 |
| PJT Electrical Ltd | Construction | 2017 |
| PK Heating & Electrical Limited | Construction | 2010 |
| PL Mulligan Funeral Directors Ltd. | Other services | 2008 |
| PL8 Studio UK Ltd | Manufacturing | 2025 |
| Platon Interiors Limited | Construction | 2006 |
| Play&Glow Events Ltd | Administrative & support | 2025 |
| Playlive Events Limited | Administrative & support | 2017 |
| PLS Management Services Limited | Professional & scientific | 2025 |
| Plumb X’Press Limited | Construction | 2019 |
| Plymouth Marine Safari Ltd | Administrative & support | 2026 |
| PMA Construction Ltd | Construction | 2015 |
| PMA Invest Ltd | Real estate | 2024 |
| PMM Construction Ltd | Wholesale & retail | 2026 |