| Procen Ltd | Professional & scientific | 2003 |
| Provision Plastics Ltd. | Professional & scientific | 1996 |
| Pwlldu Conservation Limited | Administrative & support | 1998 |
| Quickset Plasterers Limited | | 1987 |
| R & S Bevan Limited | Transport & logistics | 2003 |
| Rapwood Ltd | Real estate | 2000 |
| Remotequest Projects Limited | Administrative & support | 1993 |
| Rhymney Oriental Ltd | Hospitality | 2022 |
| Riverlink Enterprises Limited | Transport & logistics | 2006 |
| Robert Price & Sons Limited | Wholesale & retail | 1946 |
| Robert Stone & SON Limited | | 1978 |
| Roto Properties Limited | Real estate | 2008 |
| Rythym of the Night Productions | | 1996 |
| S.M. & R.D. Limited | | 1989 |
| Scanpole UK Limited | Manufacturing | 1998 |
| Scrap Processors Limited | | 1966 |
| Seven Three (Caerleon) Limited | | 1978 |
| Severn Power Holdings Limited | Financial services | 2024 |
| Site Services (U.K.) Limited | | 1981 |
| Skenchill Ltd | Agriculture & fishing | 2024 |
| South Wales Locksmiths Limited | Extraterritorial | 1991 |
| South Wales Steel Supplies Limited | Transport & logistics | 1979 |
| Specialist Heavy Engineers Limited | Extraterritorial | 1970 |
| Sportsflight Limited | | 1988 |
| Sran Properties Limited | Real estate | 2024 |
| SRK Consulting (Europe) Limited | Professional & scientific | 1998 |
| SRK Consulting (Global) Limited | Financial services | 1994 |
| SRK Consulting (UK) Share Reserve Limited | Financial services | 1997 |
| ST Briavels Mews Management Company Limited | Households | 1999 |
| St.Julians Garage Co.Limited | Wholesale & retail | 1962 |
| Stayfast Safety Holders Limited | | 1986 |
| Surma Design Limited | | 1988 |
| Sutton Bridge Holdings Limited | Financial services | 2024 |
| Swss Trustees Limited | Financial services | 2005 |
| T. & M. Steel Erection Limited | Wholesale & retail | 1991 |
| Taylor Made Energy Savers Europe Limited | Transport & logistics | 1990 |
| Taylor Made Energy Savers Limited | Water & waste | 1989 |
| Testclaim Limited | | 1989 |
| THE Dog Spa Limited | Other services | 2003 |
| THE Fields Nursing Home Ltd | Health & social care | 1987 |
| THE Folio Partnership Limited | Construction | 2006 |
| THE Luckiest Star Limited | Hospitality | 2024 |
| Theo Jones & Co. Ltd | Professional & scientific | 2000 |
| Thomas & Beard Limited | Wholesale & retail | 1994 |
| Tokensar Limited | | 1982 |
| Toucan Systems Limited | Manufacturing | 1986 |
| Townhome Consultants Limited | | 1984 |
| U-Hire (Equipment and Sales) Limited | Administrative & support | 1983 |
| Ukts Limited | Professional & scientific | 2003 |
| Underpint Limited | Transport & logistics | 1985 |
| Unique Xavier Limited | Real estate | 2020 |
| USK Valley Construction Limited | Construction | 2002 |
| Valley Homes (Wales) Limited | Construction | 2005 |
| Valleys Finance Limited | Financial services | 2009 |
| Valleys Tiles Ltd | Extraterritorial | 2013 |
| Vanni Scarfi & Co. Limited | Administrative & support | 1961 |
| Varichem Co. Limited | Manufacturing | 1974 |
| Vetti Ltd | Wholesale & retail | 2020 |
| Vick Fashion Ltd | Wholesale & retail | 2026 |
| Victor Marine (SW) Limited | Energy | 1990 |
| Vision 2000 (UK) Limited | Manufacturing | 2002 |
| Volcke Aerosol UK Ltd | Manufacturing | 1994 |
| W. T. Edgington (Sandhurst) Services Limited | Real estate | 1977 |
| Wales & West Garage Equipment Limited | | 1989 |
| Warrender Consulting Limited | Information & communication | 2008 |
| Williams & Williams Builders Limited | | 1982 |
| Willington Holdings Limited | Financial services | 2024 |
| Wimbourne Construction Limited | | 1988 |
| WJT Cladding Ltd | Construction | 2006 |
| Wyvision Limited | Health & social care | 2002 |
| Yummie's Fastfood Supplies Limited | Wholesale & retail | 2000 |
| Zafco Real Estate UK Ltd | Real estate | 2020 |
| Ziplink Limited | | 1992 |