| Prime Inclusive Adaptations Limited | Construction | 2024 |
| Prime Integration CIC | Education | 2024 |
| Prime KB Ltd | Wholesale & retail | 2019 |
| Prime Lettings & Investments Limited | Extraterritorial | 2024 |
| Prime Motors Cardiff Limited | Wholesale & retail | 2025 |
| Prime Place 24 Ltd | Hospitality | 2024 |
| Prime Prep Logistics Limited | Wholesale & retail | 2025 |
| Prime Prestige Global Ltd | Construction | 2025 |
| Prime Resin Company Ltd | Administrative & support | 2024 |
| Prime Resource Group Ltd | Wholesale & retail | 2024 |
| Prime Ridge Ltd | Wholesale & retail | 2025 |
| Prime Spot Services Ltd | Administrative & support | 2020 |
| Prime Stone Systems Ltd | Information & communication | 2025 |
| Prime Structures 02 Ltd | Construction | 2026 |
| Prime UK Residential Limited | Real estate | 2013 |
| Prime Vantage Services Ltd | Other services | 2025 |
| Prime Vault Trade Ltd | Wholesale & retail | 2024 |
| Prime Zimbabwe Representative Limited | Financial services | 2019 |
| Primeactions Professional Services Ltd | Information & communication | 2026 |
| Primeactions Property Management Ltd | Households | 2026 |
| Primeactions Property Services Ltd | Construction | 2026 |
| Primeactions Real Estates Ltd | Real estate | 2026 |
| Primeaxis Education Ltd | Education | 2025 |
| Primebridge Digital Ltd | Wholesale & retail | 2025 |
| Primebridge EC Ltd | Wholesale & retail | 2024 |
| Primeecart Ltd | Wholesale & retail | 2025 |
| Primeedge Ventures Ltd | Wholesale & retail | 2026 |
| Primegourmet Ltd | Hospitality | 2025 |
| Primeguard Carpet Care Ltd | Administrative & support | 2026 |
| Primeguard Fire and Security Ltd | Construction | 2024 |
| Primehead Publishing Limited | Information & communication | 2020 |
| Primehealth Relief Ltd | Manufacturing | 2025 |
| Primehunt Ltd | Wholesale & retail | 2026 |
| Primelife Wellness Limited | Wholesale & retail | 2026 |
| Primemerit Limited | Real estate | 1990 |
| Primeoutlet Limited | Real estate | 2004 |
| Primepickuk Ltd | Wholesale & retail | 2025 |
| Primeportal Ltd | Wholesale & retail | 2025 |
| Primeruf Realty Limited | Real estate | 2025 |
| Primeshift HGV & PSV Ltd | Transport & logistics | 2025 |
| Primeship Ltd | Wholesale & retail | 2025 |
| Primesite Properties (Pencoed) Limited | Construction | 2009 |
| Primesource Properties Ltd | Real estate | 2024 |
| Primestock Emporium Ltd | Wholesale & retail | 2024 |
| Primestone Homes Ltd | Other services | 2024 |
| Primestone Property Services Limited | Construction | 2024 |
| Primestox Limited | Wholesale & retail | 2015 |
| Primevitalsit Ltd | Public administration | 2025 |
| Primex Foods Ltd | Professional & scientific | 2022 |
| Primordial Properties Ltd | Real estate | 2021 |
| Primrose Hill Real Estate Limited | Financial services | 2019 |
| Primus Textile Ltd | Professional & scientific | 2015 |
| Primus VOX Ltd | Wholesale & retail | 2025 |
| Prince Holdings (Norfolk) Limited | Professional & scientific | 2023 |
| Prince of Wales Theatre (Cardiff) Limited | Extraterritorial | 1957 |
| Prince Talent & Resourcing Group Limited | Information & communication | 2024 |
| Princely Homes Limited | Construction | 1984 |
| Princes Mansions (Cardiff) Management Company Limited | Households | 2008 |
| Princes Road Construction Ltd | Construction | 2011 |
| Princess Way (Brackla) Management Company Limited | Households | 2004 |
| Princeton Carebridge Limited | Professional & scientific | 2011 |
| Principal Garages & Properties Limited | Administrative & support | 2019 |
| Principal Optical Glazing Ltd | Manufacturing | 2020 |
| Principality Bank Limited | Financial services | 1991 |
| Principality Catering Ltd | Hospitality | 2018 |
| Principality Covered Bonds LLP | | 2024 |
| Principality Experience Limited | Extraterritorial | 2015 |
| Principality Financial Management Limited | Financial services | 2004 |
| Principality Group Limited | Financial services | 2015 |
| Principality Homes Ltd | Real estate | 1985 |
| Principality IT Limited | Information & communication | 2010 |
| Principality Limited | Financial services | 1997 |
| Principality Mortgage and Insurance Services Limited | Financial services | 1985 |
| Principality Mortgage Corporation Limited | Financial services | 2010 |
| Principality Motor Company Ltd | Wholesale & retail | 2017 |
| Principality Personal Loans Limited | Financial services | 1990 |
| Principality Places Limited | Hospitality | 2025 |
| Principality Plastics Warehouse Limited | Wholesale & retail | 1992 |
| Principality Power Ltd | Energy | 2026 |
| Principality Properties (Cardiff) Limited | Real estate | 2007 |
| Principality Properties (UK) Limited | Real estate | 2011 |
| Principality Property Development Services Limited | Real estate | 2010 |
| Principality Property Services Limited | Real estate | 2001 |
| Principality Roofing and Construction ( Wales ) Ltd | Construction | 2023 |
| Principality Stadium Experience Limited | Extraterritorial | 2015 |
| Principality Stadium Limited | Extraterritorial | 2015 |
| Principle Medical Group Limited | Health & social care | 2023 |
| Principle Law Limited | Administrative & support | 2005 |
| Principle Racing Ltd | Arts & recreation | 2021 |
| Print Copy Tech Ltd | Manufacturing | 2018 |
| Print Corporation Ltd | Manufacturing | 2023 |
| Print Juice Limited | Manufacturing | 2017 |
| Print LAB Cardiff DG Ltd | Manufacturing | 2026 |
| Print Partnership Reprographics Limited | Administrative & support | 2000 |
| Print Partnership Service Limited | Administrative & support | 2002 |
| Print Shop London Ltd | Other services | 2018 |
| Printd Image Ltd | Wholesale & retail | 2022 |
| Printerco Ltd | Wholesale & retail | 2017 |
| Printingwales.Com Ltd | Manufacturing | 2006 |
| Printoof Ltd | Professional & scientific | 2025 |