| Red Lion Inn Limited | Hospitality | 2013 |
| Rhayader Motocross Club Ltd | Arts & recreation | 2007 |
| Ridge Wardine Limited | Manufacturing | 2023 |
| RIP Eazy Limited | Wholesale & retail | 2026 |
| Riversimple Engineering Limited | Manufacturing | 2001 |
| Riversimple Ideas Limited | Manufacturing | 2018 |
| Riversimple Movement Limited | Manufacturing | 2015 |
| RJ and WV Feakins & Sons Limited | Agriculture & fishing | 2002 |
| Rnaturemachine Limited | Wholesale & retail | 2019 |
| ROB Owens Lumberjack Training Limited | Education | 2023 |
| Roma Brook Ltd | Hospitality | 2017 |
| Romail Photo Art Limited | Arts & recreation | 2002 |
| RON Johnson Designs Ltd | Wholesale & retail | 2017 |
| Rosehill Mews Management Limited | Real estate | 1973 |
| Rosslare Management Llandrindod Ltd | Households | 2016 |
| RR Finance Limited | Financial services | 2013 |
| RS Commercial Partners Custodian Limited | Administrative & support | 2010 |
| RS Community Custodian Limited | Administrative & support | 2010 |
| RS Customers Custodian Limited | Administrative & support | 2010 |
| RS Environment Custodian Limited | Administrative & support | 2010 |
| RS Investor Custodian Limited | Administrative & support | 2010 |
| RS Staff Custodian Limited | Administrative & support | 2010 |
| S&M Rural Properties Ltd | Real estate | 2016 |
| S.P. Filling Systems Limited | Manufacturing | 1987 |
| Saintswell Enduro Events Limited | Arts & recreation | 2024 |
| Salaksh Limited | Wholesale & retail | 2024 |
| Sam's Plumbing & Heating Ltd | Construction | 2019 |
| Samuel Electrics Limited | Construction | 2018 |
| Sarah KAY Post Limited | Information & communication | 2019 |
| Screenspark Limited | Construction | 2021 |
| Severn Enterprises Limited | Extraterritorial | 2020 |
| Severn Healthcare UK Limited | Health & social care | 2020 |
| Shapeshiftprintworks Limited | Manufacturing | 2025 |
| Shropshire Tree Surgery Limited | Administrative & support | 2017 |
| Sigmabee Ltd | Information & communication | 2011 |
| Silver Magnolia Ltd | Wholesale & retail | 2017 |
| Silvergrid Limited | Information & communication | 2010 |
| SIM and SIM Limited | Construction | 2014 |
| Site Construction Limited | Construction | 2015 |
| Site Power & Control Solutions Ltd | Manufacturing | 2022 |
| Skye Instruments Employee Benefit Trustee Limited | Professional & scientific | 2009 |
| Skye Instruments Limited | Manufacturing | 1983 |
| Smarter Data Limited | Other services | 2020 |
| Sole Traders (Midlands) Ltd | Wholesale & retail | 2011 |
| South Somerset Autograss Club Limited | Arts & recreation | 1992 |
| SP Racing Limited | Arts & recreation | 2015 |
| Spa Motors (MID Wales) Limited | Wholesale & retail | 2014 |
| Specialist Electrical Contractors Limited | Construction | 2013 |
| Spts Management Limited | Households | 2018 |
| Squirrels Nest Treehouse Retreat Limited | Hospitality | 2020 |
| Starr Homes Limited | Real estate | 2018 |
| Steel Builds Construction Limited | Construction | 2023 |
| Steve James Carpentry Ltd | Construction | 2017 |
| Steve Rowlands and Sons (Utilities) Limited | Construction | 2016 |
| Stoneleigh Management (Llandrindod Wells) Limited | Households | 2011 |
| Stoney Court Poultry Ltd | Agriculture & fishing | 2019 |
| Stratlab Holdings Limited | Financial services | 2018 |
| Streamline Structures Limited | Extraterritorial | 1989 |
| Structures Ceylon Limited | Real estate | 2023 |
| Studio Blueprint AI Ltd | Information & communication | 2026 |
| Sun Hill Residents ST. Harmon Limited | Water & waste | 2015 |
| Sunnycroft (Llandrindod Wells) Limited | Real estate | 1984 |
| Superspan Frame Systems Limited | Professional & scientific | 1994 |
| Surebuild Construction Materials & Solutions Ltd | Professional & scientific | 2026 |
| Sustainable Community Homes Limited | Construction | 2012 |
| Sustainable Community Housing Limited | Construction | 2010 |
| Sustainable Living Solutions Limited | Professional & scientific | 2018 |
| Sylfaen Sustainability Community Interest Company | Education | 2009 |
| SYN3 Ltd | Professional & scientific | 1999 |
| System Design Solutions Ltd | Professional & scientific | 2022 |
| T.S. Gittoes Limited | Wholesale & retail | 2003 |
| TAB CBD Ltd | Manufacturing | 2021 |
| TAB Drinks Ltd | Manufacturing | 2021 |
| TAB Water Ltd | Manufacturing | 2021 |
| TAI Llechrhyd Limited | Construction | 2023 |
| Tarmacadam Driveways Ltd | Construction | 2016 |
| Taylormade Performance Engineering Limited | Manufacturing | 2000 |
| Tenways Consultancy Limited | Professional & scientific | 2006 |
| Terence Francis Plumbing & Heating Ltd | Construction | 2002 |
| THE 82045 Steam Locomotive Trust | Manufacturing | 2009 |
| THE Bryn Garage Ltd | Wholesale & retail | 2023 |
| THE Car Shop on the Corner Limited | Wholesale & retail | 2020 |
| THE Central (Llandrindod Wells) Management Company Limited | Administrative & support | 2011 |
| THE Dreaming Ltd | Arts & recreation | 2022 |
| THE Foot Lady Powys Ltd | Health & social care | 2021 |
| THE Hampton Hotel Ltd | Hospitality | 2019 |
| THE Hogget (Hook) Limited | Hospitality | 2024 |
| THE Lamb Inn Moss Road Limited | Hospitality | 2021 |
| THE Land Justice Coalition Ltd | Other services | 2025 |
| THE New Central Management Company Limited | Households | 2019 |
| THE Poffee Ltd | Hospitality | 2022 |
| THE Radnorshire Company Limited | Manufacturing | 2015 |
| THE Radnorshire Wildlife Trust Limited | Other services | 1987 |
| THE Sales and Service Centre Limited | Wholesale & retail | 2017 |
| THE Sound Company Limited | Information & communication | 1993 |
| THE Southern Autograss League Limited | Arts & recreation | 1992 |
| THE Trout Beulah Limited | Hospitality | 2018 |
| THE Trout Shop Beulah Limited | Wholesale & retail | 2018 |
| THE Walsh Connection CIC | Education | 2025 |
| THE Woollen Cwtch Company Limited | Other services | 2023 |