| PPS Utilities Services Ltd | Other services | 2010 |
| PRC (Wales) Ltd | Health & social care | 2012 |
| Precision Landscaping Ltd | Administrative & support | 2025 |
| Precision VAG Ltd | Wholesale & retail | 2025 |
| Prema Perumal Trinity Limited | Real estate | 2020 |
| Premier 1 Health Care Limited | Health & social care | 2013 |
| Premier Express Llangennech Stores Ltd | Wholesale & retail | 2024 |
| Prima Foods U.K. Holdco Limited | Financial services | 2026 |
| Prima Foods U.K. Limited | Manufacturing | 1997 |
| Primavera Therapy Limited | Other services | 2022 |
| Prime Architecture Limited | Professional & scientific | 2016 |
| Prime Deals for YOU Ltd | Wholesale & retail | 2023 |
| Printhausco Ltd | Manufacturing | 2026 |
| Printworks Coffee Ltd | Hospitality | 2017 |
| Pritsch & Partners International Services Ltd | Transport & logistics | 2019 |
| PRL Design Ltd | Manufacturing | 2020 |
| Pro-Grafix Limited | Professional & scientific | 2023 |
| Probe-Rts.Com Limited | Professional & scientific | 2006 |
| Product Drop Ltd | Wholesale & retail | 2022 |
| Professorprints Ltd | Wholesale & retail | 2024 |
| Project Crane Services Ltd | Construction | 2024 |
| Promave Ltd | Wholesale & retail | 2020 |
| Prometheus Electrical Ltd | Construction | 2017 |
| Properties Newydd Limited | Real estate | 2018 |
| Propertlc Limited | Professional & scientific | 2024 |
| Property Blue Sky Ltd | Real estate | 2018 |
| Property LET 3000 Limited | Real estate | 2026 |
| Property Solutions West Ltd | Real estate | 2024 |
| Prophecy Planning Ltd | Professional & scientific | 2015 |
| Proprietas Developments Ltd | Real estate | 2020 |
| Proprietas Group Ltd | Real estate | 2020 |
| Proprietas Rentals Ltd | Real estate | 2020 |
| Prosecco Festival Limited | Hospitality | 2017 |
| Prosser Construction Limited | Real estate | 2005 |
| Prostyle (Wales) Limited | Construction | 2009 |
| Protehnicus UK Ltd | Other services | 2015 |
| Pruex Ltd | Professional & scientific | 2016 |
| PS91 Hospitality Limited | Hospitality | 2024 |
| PSC Building Ltd | Construction | 2009 |
| Pullman Properties Ltd | Real estate | 2014 |
| Pure Dream Clean Limited | Administrative & support | 2024 |
| Pure Energy Eco Ltd | Other services | 2020 |
| Pzazz Parfum Limited | | 1988 |
| Qaqc Experts Limited | Professional & scientific | 2022 |
| Qualitecgrp Ltd | Manufacturing | 2024 |
| Quality Spice Ltd | Hospitality | 2025 |
| Quantas Construction Ltd | Construction | 2016 |
| Quayside Medical Aesthetics Limited | Other services | 2016 |
| Quest Health and Wellness Ltd | Extraterritorial | 2024 |
| R & a Properties Llangennech Limited | Real estate | 2019 |
| R & a Secure Services Limited | Professional & scientific | 2012 |
| R & K Gravell Properties Ltd | Real estate | 2019 |
| R J Labour Hire Limited | Administrative & support | 2020 |
| R Squared Technologies Limited | Professional & scientific | 2009 |
| R T Tiling Specialists Ltd | Construction | 2026 |
| R&M Property Holdings Ltd | Real estate | 2025 |
| R-T-S-Cycles Ltd | Manufacturing | 2024 |
| R.A.B Glazing & Home Improvments Ltd | Construction | 2024 |
| R.A.L.D Construction Ltd | Construction | 2022 |
| R.H.A.M.P's Limited | Wholesale & retail | 2025 |
| R.M.D. Engineering Limited | Real estate | 1993 |
| R.T. Electrics Limited | Energy | 1998 |
| Racing Green Engineering Limited | Manufacturing | 2003 |
| Racing Green Restoration Services Limited | Manufacturing | 2018 |
| Radiant Aesthetics & Wellness Ltd | Health & social care | 2026 |
| Rafart Transport Limited | Transport & logistics | 2016 |
| Raghu Radiology Services Ltd | Health & social care | 2010 |
| Railing Media Ltd | Information & communication | 2019 |
| Rain Media Entertainment Limited | Information & communication | 2013 |
| Raju Uppala Limited | Health & social care | 2015 |
| Ramat Foods Ltd | Hospitality | 2025 |
| Randall Maintenance Limited | Construction | 2020 |
| Rareblend Limited | Professional & scientific | 1993 |
| RAW Industries Ltd | Information & communication | 2017 |
| Raymond Pugh Limited | Wholesale & retail | 2015 |
| RB OT Services Limited | Health & social care | 2018 |
| RC Models Direct Ltd | Wholesale & retail | 2025 |
| RC Support Services Ltd | Wholesale & retail | 2023 |
| RCM Investment Group Ltd | Real estate | 2023 |
| RCM Software Development Limited | Information & communication | 2014 |
| RD Nominees Limited | Extraterritorial | 2008 |
| Ready Developments Ltd | Construction | 2023 |
| Reasonswift Company Ltd | Hospitality | 2023 |
| Rebel Vaper Limited | Wholesale & retail | 2019 |
| Recipe Roots Limited | Wholesale & retail | 2024 |
| Reconnecting Carms CIC | Health & social care | 2022 |
| Recycle Things Ltd | Construction | 2018 |
| Recycling Equipment (UK) Limited | Wholesale & retail | 2012 |
| Red Bite Ltd | Hospitality | 2019 |
| Red Brand Media Ltd | Administrative & support | 2019 |
| Red Dragon Acquisitions II Limited | Information & communication | 2021 |
| Red Dragon Acquisitions Limited | Information & communication | 2008 |
| Red Dragon Motors Limited | Wholesale & retail | 2017 |
| Red Dragon Retreading Limited | Manufacturing | 1970 |
| Red Kite Home Developments Ltd | Construction | 2022 |
| Red Lotus Lettings Ltd | Real estate | 2025 |
| Red Rock International Limited | Professional & scientific | 2001 |
| Red Rose Homes (Holdings) Ltd | Households | 2024 |
| Red Rose Homes (Recycling) Limited | Water & waste | 2025 |
| Red Rose Homes Construction Ltd | Construction | 2024 |