| Pet Pronto Ltd | Wholesale & retail | 2021 |
| Petals Boutique UK Ltd | Wholesale & retail | 2024 |
| Petersfield Computer Services Ltd | Information & communication | 2020 |
| Petto Plus Limited | Wholesale & retail | 2025 |
| Petzplannr Ltd | Information & communication | 2025 |
| PFS Health Ltd | Health & social care | 2025 |
| PGC Health Limited | Health & social care | 2024 |
| PHA Thai Ltd | Manufacturing | 2025 |
| Phabula Ltd | Information & communication | 2022 |
| Pharmacovigilance Consultants Ltd | Professional & scientific | 2010 |
| Pharmaesthetica Ltd | Other services | 2025 |
| Phase Power Ltd | Construction | 2024 |
| Phenom Studio Ltd | Professional & scientific | 2020 |
| Philip Cullen Limited | Extraterritorial | 2012 |
| Philosophy Enterprises Ltd | Wholesale & retail | 2025 |
| Phiz & Co. Ltd | Professional & scientific | 2025 |
| Phlvn Limited | Wholesale & retail | 2025 |
| Phoenix Adventures Ltd | Administrative & support | 2021 |
| Phoenix Delivery (UK) Limited | Professional & scientific | 2013 |
| Phoenix Haven Properties Ltd | Real estate | 2024 |
| Phoenix Heating and Plumbing Ltd | Construction | 2024 |
| Phoenix Smoked Foods Ltd | Wholesale & retail | 2023 |
| Phoenix TRADING1 Ltd | Wholesale & retail | 2026 |
| Phoenix Wishes Ltd | Administrative & support | 2024 |
| Phonebridge UK Limited | Information & communication | 2012 |
| Phunkyn Limited | Wholesale & retail | 2025 |
| Picilian Entertainment Ltd | Information & communication | 2024 |
| Pickford Engineering Consultancy Ltd | Professional & scientific | 2025 |
| Pictama Ltd | Wholesale & retail | 2019 |
| PIE2SYSTEMS Limited | Transport & logistics | 2026 |
| Pike Property Group Ltd | Real estate | 2025 |
| Pilbe Limited | Information & communication | 2025 |
| PIM Preston Designs Ltd | Professional & scientific | 2020 |
| PIN UP Properties Ltd | Real estate | 2021 |
| Pinar Marine Limited | Professional & scientific | 2026 |
| Pincer Technologies Ltd | Information & communication | 2024 |
| Pineapple's Travels Ltd | Administrative & support | 2024 |
| Pinestate Solutions Ltd | Wholesale & retail | 2025 |
| Pinhouse Limited | Information & communication | 2025 |
| Pink Cat Publishing and Media Ltd | Information & communication | 2024 |
| Pink Peanuts Entertainment Ltd | Arts & recreation | 2025 |
| Pinkbrainlab Ltd | Professional & scientific | 2024 |
| Pinned Properties Ltd | Real estate | 2025 |
| Pipedream Holdings Ltd | Wholesale & retail | 2024 |
| Pipeline Pro Systems Ltd | Administrative & support | 2025 |
| Piperpro Ltd | Professional & scientific | 2025 |
| PIT Top Property Solutions Ltd | Construction | 2025 |
| Pitch Trips Ltd | Administrative & support | 2023 |
| Pitchblack Events Ltd | Arts & recreation | 2025 |
| Pivot Ideas Ltd | Information & communication | 2017 |
| Pixel Dynamics Studio Ltd | Information & communication | 2024 |
| Pixel Growth Hub Ltd | Information & communication | 2025 |
| Pixel Partners Limited | Wholesale & retail | 2023 |
| Pixigen Ltd | Information & communication | 2024 |
| Pizzeria Bufala Ltd | Wholesale & retail | 2021 |
| PJ VN Tutoring Ltd | Education | 2024 |
| PJG Projects Ltd | Professional & scientific | 2014 |
| Pjkb Holdings Ltd | Financial services | 2025 |
| Pjmd Studio Ltd | Manufacturing | 2022 |
| PK Housing Limited | Real estate | 2025 |
| Plamedie Brands Ltd | Wholesale & retail | 2025 |
| Planar Property Ltd | Real estate | 2018 |
| Plane Trees RTM Company Limited | Households | 2025 |
| Planet Odyssey Limited | Real estate | 2025 |
| Planetloop Ventures Limited | Professional & scientific | 2025 |
| Planetoid Limited | Wholesale & retail | 2021 |
| Plantt Ltd | Information & communication | 2026 |
| Plant’D Kitchen Ltd | Hospitality | 2025 |
| Platinum Group of Properties Limited | Real estate | 2024 |
| Plato Ventures Ltd | Financial services | 2023 |
| Platt View Property Holdings Ltd | Real estate | 2025 |
| Play Pause Digital Limited | Information & communication | 2024 |
| Playbook Investments Limited | Financial services | 2022 |
| Playerone Entertainment Ltd | Information & communication | 2021 |
| Playful Accessories Limited | Manufacturing | 2025 |
| Playplix Ltd | Information & communication | 2018 |
| PLL Ventures Limited | Wholesale & retail | 2024 |
| Plonic Tech Limited | Information & communication | 2024 |
| Ploutos Property Group Ltd | Real estate | 2022 |
| PLR Design Works Ltd | Professional & scientific | 2023 |
| PLR Property Limited | Real estate | 2017 |
| Pluck Ventures Limited | Wholesale & retail | 2025 |
| Plugin Factory Limited | Professional & scientific | 2023 |
| Plugnest Ltd | Transport & logistics | 2025 |
| Plural Zone Solutions Ltd | Information & communication | 2012 |
| Pluto's Pet Supplies Limited | Manufacturing | 2024 |
| Plutrio Ltd | Information & communication | 2025 |
| PM Marketing Ltd | Wholesale & retail | 2025 |
| PM Technologies Limited | Information & communication | 2025 |
| PME Legend UK Ltd | Wholesale & retail | 2026 |
| Pmsp Industrial Group Ltd | Manufacturing | 2025 |
| PND Awareness CIC | Health & social care | 2024 |
| Pneurojobs Ltd | Administrative & support | 2025 |
| Pocket Corp Limited | Information & communication | 2026 |
| Pocket Media Tribe Ltd | Information & communication | 2025 |
| Pockets of Education Ltd | Education | 2025 |
| Poetry Global Network Ltd | Information & communication | 2021 |
| Poincare Consulting Group Ltd | Wholesale & retail | 2021 |
| Pokedean Limited | Information & communication | 2022 |
| Pokelective Ltd | Wholesale & retail | 2025 |