| Photosymphony Ltd | Construction | 2012 |
| PHP Care Ltd | Professional & scientific | 2024 |
| PHP Dent Ltd | Health & social care | 2024 |
| Phpsurgery Limited | Health & social care | 2025 |
| PHR Investments Limited | Real estate | 2013 |
| Phremko Ltd | Wholesale & retail | 2024 |
| PHS Property Investments Ltd | Real estate | 2021 |
| Phsr Consulting Services Ltd. | Professional & scientific | 2016 |
| PHV Solutions Ltd | Administrative & support | 2021 |
| Physics AI Ltd | Professional & scientific | 2026 |
| Physio Clinic London Ltd | Health & social care | 2024 |
| Physio Expert Ltd | Other services | 2014 |
| Physio Perfect Ltd | Health & social care | 2024 |
| Physio Relief UK Ltd | Health & social care | 2021 |
| Physio-Logy Ltd | Health & social care | 2025 |
| Physio-Pilates Method Limited | Other services | 2025 |
| Physiolink Clinics Limited | Health & social care | 2010 |
| Physiotherapy Excellence Ltd | Health & social care | 2025 |
| Pias Production Limited | Administrative & support | 2008 |
| Pic.Projects Limited | Administrative & support | 2018 |
| Picasso Surfaces Ltd | Wholesale & retail | 2026 |
| Pick N Save Supermarkets Limited | Wholesale & retail | 2016 |
| Pickles HMU Ltd | Information & communication | 2026 |
| Pickwick Investments Limited | Administrative & support | 2002 |
| Pickwick Jewellers Ltd | Extraterritorial | 2004 |
| Picture & Imaging Consultants Ltd | Professional & scientific | 2006 |
| Picture UP Productions Limited | Information & communication | 2017 |
| Picturebyck Limited | Manufacturing | 2024 |
| Picwa Ltd | Information & communication | 2009 |
| Pidima Ltd | Information & communication | 2024 |
| PIE Films (UK) Limited | Information & communication | 2025 |
| Piecesbydawn Ltd | Extraterritorial | 2022 |
| Piggy's Cafe Limited | Wholesale & retail | 2004 |
| Pillar Care Group Ltd | Health & social care | 2023 |
| Pillar One Capital Ltd | Professional & scientific | 2026 |
| Pillarheart Holdings Ltd | Financial services | 2025 |
| Pillarpro Ltd | Construction | 2025 |
| Pillarstone Estate Holdings Ltd | Real estate | 2025 |
| Pillayar Minimart Ltd | Wholesale & retail | 2017 |
| Pilling Orthopaedics Limited | Health & social care | 2020 |
| Pillow Laboratory Ltd | Real estate | 2024 |
| Pills and Potions Ltd | Wholesale & retail | 2011 |
| Piloggroup UK Holdings Ltd | Administrative & support | 2024 |
| Pimpisa Entrepreneur Limited | Wholesale & retail | 2025 |
| PIN Badge Pictures Limited | Information & communication | 2024 |
| PIN Estates Ltd | Real estate | 2022 |
| Pina Mansi Ltd | Wholesale & retail | 2026 |
| Pinaka Real Estate One Ltd | Real estate | 2023 |
| Pinal Risk Services Ltd | Financial services | 2013 |
| Pinarc Ltd | Professional & scientific | 2026 |
| Pindoria Associates Limited | Professional & scientific | 2015 |
| Pindoria Consultants Ltd | Professional & scientific | 2024 |
| Pindoria Investments Limited | Administrative & support | 1993 |
| Pindoria Properties Limited | Real estate | 2003 |
| Pindoria Property Holding Ltd | Real estate | 2025 |
| Pindoriya Investments Limited | Real estate | 2011 |
| Pine Wave Limited | Hospitality | 2014 |
| Pinedale Investments Ltd | Real estate | 2024 |
| Pineoak Investments Ltd | Real estate | 2024 |
| Pineoak Properties Limited | Real estate | 1987 |
| Pinevox Limited | Information & communication | 2023 |
| Pinewood Grove Residents' Association Limited | Households | 1972 |
| Pink Pebble Ltd | Real estate | 2022 |
| Pink Snow Ltd | Professional & scientific | 2022 |
| Pink Straw Productions Limited | Arts & recreation | 2022 |
| Pinks Hair & Beauty Ltd | Other services | 2024 |
| Pinksalt Partners Ltd | Professional & scientific | 2019 |
| Pinky Beautyzone Limited | Administrative & support | 2017 |
| Pinky Palace Ltd | Extraterritorial | 2012 |
| Pinn Capital Limited | Financial services | 2026 |
| Pinn Holdings Limited | Financial services | 2020 |
| Pinn Homes Limited | Construction | 2017 |
| Pinn-It Limited | Manufacturing | 2001 |
| Pinnacle Bureau Limited | Professional & scientific | 2002 |
| Pinnacle Cricket Academy Limited | Education | 2026 |
| Pinnacle Enterprises Limited | Real estate | 2017 |
| Pinnacle Estate (S&L) Ltd | Real estate | 2016 |
| Pinnacle Estate (Sales) Ltd | Real estate | 2022 |
| Pinnacle Exports Ltd | Wholesale & retail | 2025 |
| Pinnacle Heating Ltd | Other services | 2015 |
| Pinnacle Home Solutions Limited | Construction | 2026 |
| Pinnacle Karma Consultancy Ltd | Professional & scientific | 2019 |
| Pinnacle Secinfo Ltd | Information & communication | 2018 |
| Pinnacle Wines Ltd | Wholesale & retail | 2026 |
| Pinnaclepay Ltd | Financial services | 2024 |
| Pinner Car Services Ltd | Wholesale & retail | 2020 |
| Pinner Drycleaners & Launderette Limited | Other services | 2025 |
| Pinner Estates Limited | Construction | 2017 |
| Pinner Green MOT and Service Centre Ltd | Wholesale & retail | 2018 |
| Pinner Hospitality Limited | Hospitality | 2024 |
| Pinner Lawn Tennis Club Limited | Arts & recreation | 2023 |
| Pinner Papers Limited | Wholesale & retail | 2021 |
| Pinner Park Gardens Limited | Administrative & support | 2017 |
| Pinner Road (Harrow) Management Company Limited | Households | 1980 |
| Pinner Road Freehold Ltd | Households | 2025 |
| Pinner Road Mechanics Ltd | Wholesale & retail | 2026 |
| Pinner Road Project UK Limited | Real estate | 2019 |
| Pinner View Management Ltd. | Real estate | 1993 |
| Pinner View Properties Limited | Households | 1980 |
| Pinner View, Harrow Limited | Households | 1999 |