| Ovex Care Limited | Hospitality | 2020 |
| Owen Accountants Limited | Professional & scientific | 2012 |
| Oxby Limited | Information & communication | 1998 |
| Oxgate Lane LLP | | 2016 |
| Oxpen Solutions Ltd | Health & social care | 2019 |
| Oxyvita Limited | Wholesale & retail | 2001 |
| Ozkaratas Limited | Hospitality | 2012 |
| P & J Associates Ltd | Professional & scientific | 2011 |
| P & P Tree Services Limited | Administrative & support | 2024 |
| P a Michel Limited | Wholesale & retail | 2011 |
| P C Plumbing Contractors Ltd | Construction | 2014 |
| P Dell Stag Ltd | Construction | 2025 |
| P Health Debtco Limited | Professional & scientific | 2019 |
| P Henry and SON Limited | Hospitality | 2012 |
| P J Leonard Haulage Limited | Transport & logistics | 2006 |
| P J'S TV and Film Construction Ltd | Professional & scientific | 2015 |
| P&A Bespoke Joinery Limited | Manufacturing | 2026 |
| P&D Vincent Investments Ltd | Professional & scientific | 2022 |
| P&M IT Consultancy Ltd | Information & communication | 2018 |
| P&T Heating Services Ltd | Construction | 2021 |
| P.B's Carpentry Limited | Manufacturing | 2014 |
| P.K. Meads & Sons Limited | Construction | 2012 |
| P.K.F. Global Limited | Wholesale & retail | 1995 |
| P3ARL Limited | Administrative & support | 2025 |
| Pabulum Publications Limited | Extraterritorial | 2013 |
| Pace Bridging Limited | Financial services | 2019 |
| Pack to the Future Limited | Transport & logistics | 2025 |
| Packmate Trade Supplies Limited | Wholesale & retail | 2023 |
| Pactum Curo Limited | Professional & scientific | 2007 |
| Padelking Ltd | Construction | 2025 |
| Pagent Deliveries LLP | | 2020 |
| Painted Railings Limited | Households | 2010 |
| Pakturk Foods Ltd | Hospitality | 2021 |
| Pallas Productions Ltd | Information & communication | 2024 |
| Pallett Properties Limited | Hospitality | 2021 |
| Palmcost Ltd | Hospitality | 2023 |
| Palookaville Ltd | Wholesale & retail | 2009 |
| Pals 4 Pets Ltd | Agriculture & fishing | 2021 |
| PAM Auto Group Ltd | Wholesale & retail | 2025 |
| Pama Prop Investment Limited | Financial services | 2026 |
| Pama Properties LLP | | 2018 |
| Panaha Holdings Limited | Real estate | 2021 |
| Panamax Limited | Real estate | 2008 |
| Pancho Style Ltd | Other services | 2025 |
| Panchoo Ltd | Wholesale & retail | 2017 |
| Panjab Restaurant Ltd | Hospitality | 2014 |
| Panju Properties Limited | Real estate | 2025 |
| Panthera International Ltd | Financial services | 2024 |
| Papa Bars Ltd | Hospitality | 2022 |
| Paper Dart Ltd | Information & communication | 2019 |
| Paper Trail Media Limited | Information & communication | 2026 |
| Paperun Limited | Wholesale & retail | 1977 |
| Paperun Wholesale Limited | Other services | 1973 |
| Papilo Consulting Services Ltd | Arts & recreation | 2016 |
| Paradine Holdings Limited | Financial services | 2015 |
| Paradine Podcasts Ltd | Information & communication | 2025 |
| Paradine Productions Ltd | Information & communication | 2021 |
| Paradise Padel Club Ltd | Arts & recreation | 2026 |
| Paradise Property & Garden Maintenance Ltd | Other services | 2019 |
| Paradiso Property Ltd | Construction | 2023 |
| Paradiso Solutions Ltd | Wholesale & retail | 2023 |
| Paragon Coaching Ltd | Professional & scientific | 2017 |
| Paramount Zone Limited | Wholesale & retail | 2002 |
| Parcel Power Logistics Limited | Transport & logistics | 2017 |
| Pardis Group Ltd | Construction | 2024 |
| Pardis Services Limited | Construction | 2008 |
| Pari Home Ltd | Real estate | 2023 |
| Park Avenue Films Limited | Information & communication | 2024 |
| Park Dental Limited | Health & social care | 2014 |
| Park Drive (Canary Wharf) Limited | Real estate | 2015 |
| Park Lane Collections Limited | Wholesale & retail | 2007 |
| Park Property Investments UK Limited | Real estate | 2017 |
| Park View Consulting and Management Limited | Real estate | 2023 |
| Parkcentre Properties Limited | Real estate | 1978 |
| Parkelm Limited | Construction | 2003 |
| Parkeve Limited | Administrative & support | 2019 |
| Parknow Ltd | Transport & logistics | 2025 |
| Parkside Property Management Limited | Real estate | 1998 |
| Parmis Property Ltd | Real estate | 2018 |
| Parquet Flooring London Limited | Construction | 2023 |
| Parquetico Ltd | Manufacturing | 2018 |
| Parsa Management Limited | Real estate | 2015 |
| Partaker International Ltd | Professional & scientific | 2019 |
| Partdoor Ltd | Administrative & support | 2023 |
| Partner Music Limited | Arts & recreation | 2024 |
| Partnership Education Limited | Information & communication | 2006 |
| Partridge Property Limited | Real estate | 2014 |
| Party Empire Ltd | Arts & recreation | 2024 |
| Parx Financial Limited | Financial services | 2011 |
| Pash Advisory LLP | | 2015 |
| Passionpoint Limited | Professional & scientific | 2013 |
| Passivhaus Projects Limited | Real estate | 2025 |
| Passportcard Limited | Administrative & support | 2014 |
| Pasta Grannies Limited | Information & communication | 2017 |
| Pat-Building Ltd | Construction | 2025 |
| Patient Transport Training and Recruitment Service Ltd | Transport & logistics | 2023 |
| Patric James Ltd | Wholesale & retail | 2004 |
| Patsy Construction Limited | Construction | 2024 |
| Patternicity Ltd | Information & communication | 2020 |
| Patty & BUN Ltd | Hospitality | 2011 |