| Lyntonberry Limited | Administrative & support | 1996 |
| M and M Medical Services Ltd | Health & social care | 2024 |
| M. Delacey & Sons (Holdings) Limited | Construction | 1994 |
| M.K. (Wales) Limited | Manufacturing | 1998 |
| Manav (UK) Limited | Wholesale & retail | 2006 |
| Manav Holdings Ltd | Financial services | 2021 |
| Manav Properties Ltd | Real estate | 2020 |
| Maps Cleaning Services Limited | Administrative & support | 2005 |
| Martin Nagle & Sons Limited | Wholesale & retail | 2002 |
| Masterfoil Limited | Manufacturing | 1999 |
| MAX OFF Licence Ltd | Wholesale & retail | 2024 |
| Maxiom Development Limited | Information & communication | 2002 |
| Maxiom Limited | Construction | 2002 |
| Merthyr Engineering Company Limited | | 1969 |
| Mndg Holdings Ltd | Administrative & support | 2024 |
| Moderneyes Beauty Ltd | Other services | 2019 |
| N & J Carpentry Contractors Ltd | Construction | 2004 |
| Natural Safety Solutions Ltd | Health & social care | 2013 |
| Neath Visionplus Limited | Wholesale & retail | 1992 |
| NH 89 Ltd | Hospitality | 2024 |
| Noddfa Limited | Health & social care | 2008 |
| Novec (South Wales) Limited | | 1987 |
| Owen G’S Motors Ltd | Wholesale & retail | 2022 |
| P T Civil Engineering Limited | Construction | 2001 |
| Payton Jewell & Caines Limited | Real estate | 2003 |
| Penllyne Properties Limited | Construction | 1972 |
| Penrhadw Developments Limited | Construction | 2021 |
| Pentrebane Spice London Ltd | Hospitality | 2025 |
| Peter Smith (Bridgend) Holdings Limited | Professional & scientific | 1979 |
| Peter Smith Bridgend Limited | Wholesale & retail | 1964 |
| Photronics (Wales) Limited | Professional & scientific | 1982 |
| Pinehurst Rest Home Limited | Health & social care | 2004 |
| Pontypridd Dental Laboratory Limited | Health & social care | 2003 |
| Pontypridd Precision Engineering Limited | Manufacturing | 1988 |
| Powerpitch Limited | Transport & logistics | 1991 |
| Pro Wash Services Ltd | Other services | 2006 |
| Qbitus Products Limited | Manufacturing | 2011 |
| R.T. Clarke (Pyle) Limited | Wholesale & retail | 1959 |
| Rangeman Limited | Construction | 2023 |
| Reflex Wales Limited | Wholesale & retail | 1999 |
| Rhino Technical Services Ltd | Administrative & support | 2007 |
| Richrivers Ltd | Hospitality | 2024 |
| Rigdon Limited | Wholesale & retail | 2025 |
| Robcol Developments Limited | Professional & scientific | 1987 |
| Rolefile Limited | Wholesale & retail | 1989 |
| Ronald Dowling Floor Screeding Limited | Construction | 2004 |
| Rowan Tree Construction Ltd | Wholesale & retail | 2005 |
| S.G. Partnership Limited | Construction | 2005 |
| SAT Traders Ltd | Wholesale & retail | 2019 |
| Seasons Joinery & Timber Limited | Construction | 2006 |
| Shearwater Cleek Limited | Administrative & support | 2025 |
| Skomer Haulage Limited | Transport & logistics | 1997 |
| Sliced Media Limited | Information & communication | 2023 |
| Smiths Mechanical Services Limited | Manufacturing | 1991 |
| Specialist Hygiene Supplies Limited | | 1991 |
| Springwood Stationery Limited | | 1983 |
| Stafford Construction Ltd. | Construction | 1993 |
| Stardust Leisure Limited | Arts & recreation | 1983 |
| Storamove Limited | Other services | 2006 |
| Sublime Signs Limited | Wholesale & retail | 2011 |
| Sullivans Associates Ltd | Professional & scientific | 1996 |
| T J Fencing and Forestry Ltd | Agriculture & fishing | 2026 |
| T.C. & R.L. Adams Limited | Agriculture & fishing | 2003 |
| T.W. Joinery (South Wales) Limited | Manufacturing | 1989 |
| T2T Limited | Other services | 2001 |
| Tabor Property Developments Limited | Construction | 2005 |
| Town & Counties Construction Limited | Construction | 2006 |
| Trecenydd Fish Bar Limited | Wholesale & retail | 2003 |
| Triax UK Limited | Wholesale & retail | 1988 |
| Unified Building Maintenance Limited | | 1991 |
| Valleys of Hope Ltd | Administrative & support | 2005 |
| W.B.J. Williamstown Builders & Joiners Limited | Construction | 1975 |
| Warner Residentials Limited | Real estate | 2025 |
| Williams & Co. (Funeral Directors) Limited | Other services | 2002 |
| Williams Jenkins & Co Limited | Professional & scientific | 2003 |
| Wilsons (Bridgend) Limited | Real estate | 1939 |
| Winstons Hotel Limited | Professional & scientific | 2004 |
| Wolber Ltd | Information & communication | 2026 |
| Ystradgynwyn Limited | Hospitality | 2004 |
| Z.D.P. Limited | Professional & scientific | 1999 |
| Zoobiotic Limited | Health & social care | 2004 |