| PARCHOTEL2024 Ltd | Other services | 2024 |
| Peking City Chinese RCT Ltd | Hospitality | 2025 |
| Peking City Food Ltd | Hospitality | 2023 |
| Pembroke Stonemont Limited | Construction | 2016 |
| Penygraig Transport Limited | Transport & logistics | 2021 |
| Pepi (Tonypandy) Limited | Hospitality | 2024 |
| PGS Catering Ltd | Hospitality | 2025 |
| Phillips Homes Lettings and Sales Limited | Real estate | 2009 |
| Phills Painting Ltd | Construction | 2025 |
| Pinnacle Angling Ltd | Wholesale & retail | 2022 |
| PJF Contractors Ltd | Construction | 2025 |
| PJF Roofing & SON Ltd | Construction | 2026 |
| PK Brickwork & Construction Ltd | Construction | 2023 |
| Plasterers South Wales Ltd | Construction | 2019 |
| Playworks Therapy Limited | Health & social care | 2018 |
| Pmidhunp Limited | Transport & logistics | 2024 |
| Powell Structures Limited | Manufacturing | 2004 |
| Praana Overseas Limited | Education | 2025 |
| Precise Engineering Limited | Manufacturing | 2001 |
| Preloved.Ltd Ltd | Wholesale & retail | 2026 |
| Price Huntley & Sons Limited | Construction | 2024 |
| Privett-Owen Limited | Wholesale & retail | 2025 |
| Procost Management Solutions Limited | Professional & scientific | 2021 |
| Propel Next Generation Limited | Arts & recreation | 2022 |
| Protrend Solutions Ltd | Professional & scientific | 2024 |
| PSC Car Parts Ltd | Wholesale & retail | 2025 |
| Quickfill Catering Limited | Wholesale & retail | 2008 |
| R Lightning Promotions Ltd | Arts & recreation | 2024 |
| R&Dl Ltd | Hospitality | 2022 |
| R&L Hygiene Ltd | Administrative & support | 2026 |
| R.Dean Investments Ltd | Real estate | 2020 |
| Rail & Civils Services Limited | Construction | 2020 |
| Rainbow Healthcare Network CYF. | Health & social care | 2025 |
| RB Decs Ltd | Construction | 2025 |
| RCT Roofing Ltd | Construction | 2019 |
| RDL Civils Ltd | Construction | 2024 |
| Red EYE Music Limited | Information & communication | 2003 |
| Reevive Ice Bath Ltd | Wholesale & retail | 2026 |
| Reinforce Utilities Limited | Construction | 2017 |
| Revamp Entrance Systems Ltd | Manufacturing | 2025 |
| Revamp Style & Glamour Limited | Other services | 2023 |
| Rhondda Hydraulics Limited | Manufacturing | 2025 |
| Rhondda Records Ltd. | Information & communication | 2003 |
| Rhondda Rendering Systems Ltd | Construction | 2020 |
| Rhondda Renovation Ltd | Construction | 2023 |
| Rhondda Self Storage Limited | Administrative & support | 2010 |
| Rhys Street 1969 Limited | Extraterritorial | 2014 |
| Right LEG Limited | Real estate | 2022 |
| RKJ Global Tooling Limited | Wholesale & retail | 2014 |
| RMS Monitoring Ltd | Construction | 2023 |
| Robertsons Deli Limited | Hospitality | 2009 |
| Robertsons Electrical Ltd | Construction | 2021 |
| Rormat Hire & Supply Ltd | Wholesale & retail | 2022 |
| Rormat Ltd | Construction | 2015 |
| RPS Building Ltd | Construction | 2014 |
| RSD Engineering Wales Ltd. | Construction | 2013 |
| Russell & Hall Ltd | Hospitality | 2025 |
| Rusty Roof Limited | Arts & recreation | 2011 |
| Rydec Ltd | Construction | 2022 |
| Rydec Properties Ltd | Real estate | 2024 |
| S & L Williams Painting and Decorating Limited | Construction | 2003 |
| S and Sons Property Management Limited | Households | 2022 |
| S Jones Upvc Ltd | Construction | 2023 |
| S N Tantrum Services Limited | Construction | 2018 |
| S W Drywall Systems Limited | Construction | 2007 |
| S&S Carpentry Ltd | Manufacturing | 2026 |
| Saxonby Limited | Manufacturing | 1983 |
| SBS Building Limited | Construction | 2018 |
| SC South West Maintenance Limited | Administrative & support | 2026 |
| SDC Maintenance Ltd | Construction | 2023 |
| Seaton Enterprises Limited | Information & communication | 2010 |
| SECURITY72 Ltd | Administrative & support | 2025 |
| Shepherd Furniture Ltd | Wholesale & retail | 2001 |
| Shimmer & Shine Auto Detailing Ltd | Administrative & support | 2025 |
| Simply the Best Training Consultancy Limited | Professional & scientific | 2002 |
| Singhs Tonteg Ltd | Hospitality | 2024 |
| SIR Sunshine Limited | Construction | 2025 |
| Site Audit Services Limited | Construction | 2020 |
| Sjmr Construction Limited | Construction | 2026 |
| Sjparsons Ltd | Other services | 2020 |
| SK Marine & Power Engineering Ltd | Professional & scientific | 2025 |
| SLE Services (South Wales) Ltd | Transport & logistics | 2020 |
| Slicenspice Ltd | Hospitality | 2024 |
| Smartlift (South Wales) Ltd | Manufacturing | 2024 |
| Smartlift Limited | Administrative & support | 2004 |
| Smooth Promotions Ltd | Information & communication | 2023 |
| SMS Inspection and Rope Access Ltd | Mining & quarrying | 2019 |
| Snkr Spa Ltd | Administrative & support | 2025 |
| Softgel Solutions Ltd | Manufacturing | 2018 |
| Solar Roof Tile Company Ltd | Manufacturing | 2023 |
| Sole Foot Kind Ltd | Health & social care | 2021 |
| Soundclear UK Ltd | Wholesale & retail | 2025 |
| Sovereign Property Enterprise Ltd | Real estate | 2022 |
| Speed Raising Solutions Limited | Construction | 2016 |
| SPL Rail Limited | Construction | 2019 |
| SPOTBUILD64 Ltd | Construction | 2026 |
| ST Julians Aesthetics Ltd | Other services | 2018 |
| Stacey Surveys Ltd | Administrative & support | 2008 |
| Stallard Surveying Ltd | Real estate | 2024 |
| Star Point Installation Ltd | Construction | 2020 |