| Premium Cctv & Alarms Ltd | Administrative & support | 2024 |
| Priory Kitchens Limited | Administrative & support | 2003 |
| Pro-Precision Engineering Ltd | Professional & scientific | 2017 |
| Project Tile & Bathrooms (Pyle) Ltd | Construction | 2023 |
| Proper Furniture Co Ltd | Wholesale & retail | 2025 |
| Pulsar Film & TV Productions Ltd | Administrative & support | 2019 |
| Pulse Ltd | Professional & scientific | 2006 |
| Pure Rock Asphalte Company Limited | Construction | 1946 |
| PW Aerotech Limited | Manufacturing | 2013 |
| Quality Advertising Solutions Ltd | Manufacturing | 2026 |
| Quay Property Limited | Real estate | 2020 |
| Quest Adventure Activities Ltd | Arts & recreation | 2013 |
| Quicksigns Limited | Professional & scientific | 2001 |
| R J Lindsay Limited | Transport & logistics | 2018 |
| R&S Aeronautics Limited | Manufacturing | 2016 |
| R&T ENG Services Ltd | Professional & scientific | 2023 |
| R.D.L. Building Services Limited | Construction | 2001 |
| Raaba Engineering Limited | Manufacturing | 2013 |
| Rabaiotti Accounting Limited | Administrative & support | 2010 |
| Rackd Ltd | Wholesale & retail | 2023 |
| RAL Ventures Ltd | Households | 2021 |
| RAM Business Solutions Ltd | Professional & scientific | 2011 |
| Rapid Flow Plumbing Co. Limited | Construction | 2026 |
| Ravenissa Ltd | Administrative & support | 2013 |
| RDJ Services Limited | Manufacturing | 2024 |
| Real LMS Ltd | Education | 2025 |
| Recyclability Limited | Water & waste | 2013 |
| Red Sands Tech Services Ltd | Manufacturing | 2020 |
| Red Shiny Apple Ltd | Professional & scientific | 2015 |
| Redbrook Aerotech Limited | Manufacturing | 2018 |
| Redcroft House RTM Company Limited | Households | 2022 |
| Redi 205 Limited | Construction | 2011 |
| Reducemybills.Info Limited | Other services | 2021 |
| Renovatio Holdings Ltd | Real estate | 2025 |
| Republik Engineering Limited | Professional & scientific | 2006 |
| Rest Bay Court Porthcawl (Management Company) Limited | Real estate | 1991 |
| Rest Bay Fish Bar Limited | Hospitality | 2020 |
| Rest Bay Sports | Arts & recreation | 2019 |
| Restructuring Limited | Extraterritorial | 2013 |
| Rethink the INK Limited | Other services | 2014 |
| REX Construction Management Limited | Professional & scientific | 2023 |
| REX Home Improvements Limited | Construction | 2022 |
| REX Property Management Ltd | Real estate | 2019 |
| Rhondda Valley Formworks Ltd | Construction | 2015 |
| RIB Insurance Services Limited | Extraterritorial | 2000 |
| Richard Harries Associates Limited | Other services | 2006 |
| Rimell Engineering Services Limited | Transport & logistics | 2009 |
| Riostar Limited | Professional & scientific | 2024 |
| Risk Assist Limited | Information & communication | 2024 |
| RJB Engineering Services Limited | Transport & logistics | 2007 |
| Rjbj Electrical Limited | Manufacturing | 2017 |
| Rjcs Consultancy Limited | Manufacturing | 2025 |
| Roaringly Precious Ltd | Wholesale & retail | 2020 |
| Rococo Developments Ltd | Real estate | 2026 |
| Roofing Marketplace Limited | Construction | 2025 |
| Ross Computing Limited | Information & communication | 1997 |
| Rosy Care Homes Ltd | Financial services | 2023 |
| RSB Aviation Limited | Manufacturing | 2016 |
| RSS Aviation Limited | Manufacturing | 2014 |
| Rugbi Environmental Ltd | Water & waste | 2016 |
| Rugbi Skips Ltd | Water & waste | 2015 |
| Run GMC Services Ltd | Professional & scientific | 2024 |
| Ryanjkeylock Limited | Information & communication | 2016 |
| S & R Engineering Limited | Transport & logistics | 2004 |
| S DAS Optics Limited | Health & social care | 2025 |
| Saint Aviation Limited | Transport & logistics | 2000 |
| SAL Vale Ltd | Real estate | 2025 |
| Sandy Bottom Caravans Ltd | Hospitality | 2023 |
| SAR Aviation Limited | Transport & logistics | 2004 |
| SB Aviation Engineering Limited | Transport & logistics | 2006 |
| Sbpmack Limited | Real estate | 2022 |
| Scoops Ice Cream & Coffee Bar Limited | Hospitality | 2019 |
| Scorpion Developments (South Wales) Ltd. | Real estate | 2018 |
| Scorpion R.E.S. Limited | Hospitality | 2020 |
| Sdbale Engineering Ltd | Other services | 2018 |
| Sea & Valley Ltd | Manufacturing | 2024 |
| Seabreeze Property Limited | Real estate | 2015 |
| Sealink Connect Ltd | Professional & scientific | 2025 |
| Seashore Enterprises (Porthcawl) Limited | Hospitality | 1950 |
| Seaside Air Ltd | Energy | 2018 |
| Seaside Publications Ltd | Information & communication | 2015 |
| Seaview Crescent Management Company Limited | Households | 1988 |
| Secsy - Driver Training Limited | Education | 2013 |
| Seren Projects Limited | Construction | 2008 |
| Serenbo Aesthetics Limited | Health & social care | 2017 |
| Serendipity Care & Support Limited | Health & social care | 2011 |
| Sevco 1252 Limited | Professional & scientific | 2001 |
| Sevco 1253 Limited | Real estate | 2001 |
| Sevna Software Ltd | Information & communication | 2017 |
| Sharp Alignment Limited | Health & social care | 2019 |
| Shay Taylor Developments Ltd | Construction | 2022 |
| Shillibier and Ridley Limited | Hospitality | 2013 |
| Shoreline Supplies Ltd | Wholesale & retail | 2024 |
| Sierra Court Management Company Limited | Real estate | 2011 |
| Silver Lining Counselling Ltd | Extraterritorial | 2019 |
| Simon.Cox Ltd | Professional & scientific | 2023 |
| Simply Automatic Limited | Education | 2007 |
| Siocox Ltd | Transport & logistics | 2012 |
| Sion Jones Commercials Limited | Wholesale & retail | 2025 |
| Sion Jones Rentals Limited | Administrative & support | 2026 |