| AB Connectors Limited | Manufacturing | 1985 |
| Aggregates Express Ltd | Administrative & support | 1994 |
| Aggregates Express Quarry Products & Recycling (Forest Wood) Ltd | Mining & quarrying | 2022 |
| Aggregates Express Quarry Products Ltd | Mining & quarrying | 2021 |
| Auto-Parts (South Wales) Limited | Wholesale & retail | 1964 |
| Big Apple Logistics Limited | Transport & logistics | 2015 |
| Carpets 'N' Carpets Limited | Construction | 2001 |
| Cloud Centres Ltd | Information & communication | 2014 |
| Cloud Centres Networks Ltd | Information & communication | 2025 |
| Conti's Enterprises Limited | Wholesale & retail | 2003 |
| Corporate Services (South Wales) Limited | Professional & scientific | 2001 |
| CP Holiday Cottages Ltd | Real estate | 2021 |
| Cynon Valley Furniture Factory Outlet Limited | Real estate | 2002 |
| Cynon Valley Waste Disposal Company Limited | Water & waste | 1991 |
| DBR Training Ltd | Professional & scientific | 2006 |
| DEE Plant Limited | Construction | 2004 |
| Draethen Limited | Professional & scientific | 1997 |
| Edwards Building Surveyors Limited | Professional & scientific | 2005 |
| ELY Valley Community Sports Park Limited | Arts & recreation | 2013 |
| ELY Valley Miners Welfare Association Social Club Limited | Hospitality | 1992 |
| Erection & Welding Services Limited | Manufacturing | 2001 |
| Fforest Kennels Limited | Agriculture & fishing | 2003 |
| First Light Optical Company Limited | Wholesale & retail | 2003 |
| Friends of Animals Wales | Agriculture & fishing | 2011 |
| Full Moon (Aberaman) Limited | Construction | 2024 |
| Garth Isaf Estates Limited | Water & waste | 2020 |
| Global Energy Insulation Ltd | Construction | 2026 |
| GUS Properties (Rhondda) Limited | Wholesale & retail | 2000 |
| Home Run Property Management Limited | Real estate | 2018 |
| Hoskins Consulting Limited | Professional & scientific | 2005 |
| Howells Menswear Limited | Wholesale & retail | 2007 |
| Howells Sports Limited | Wholesale & retail | 2001 |
| Humphreys Funeral Home Limited | Other services | 2002 |
| Jeffsy 27 Limited | Other services | 2018 |
| Just Play Golf: South Wales Golf Academy CIC | Arts & recreation | 2025 |
| JVJ Consultancy Ltd | Professional & scientific | 2019 |
| Leekes Group Property Developments Limited | Real estate | 2007 |
| Llanover Arms Limited | Hospitality | 2006 |
| LM Scaffolding Ltd | Construction | 2023 |
| Maxxwell Civils Ltd | Administrative & support | 2023 |
| MSE Properties Limited | Real estate | 2006 |
| Muri Ltd | Construction | 2024 |
| N.W. Contractors Ltd | Construction | 2022 |
| Nantgarw China Works Trust | Arts & recreation | 2007 |
| NFP Properties Limited | Real estate | 2007 |
| Ollvie Limited | Households | 2011 |
| Paward Investment Limited | Real estate | 1959 |
| R S Ratcliffe (Carpentry) Limited | Construction | 2004 |
| ROD Lewis Sales Limited | Administrative & support | 2009 |
| Romans Rail Safety Critical Services Ltd | Construction | 2014 |
| Ryan Jones Group Limited | Water & waste | 2015 |
| Siblings Homes Limited | Real estate | 2026 |
| Smiley's (S.Wales) Limited | Professional & scientific | 2002 |
| Sophia Nail Spa Limited | Other services | 2022 |
| Starcke Abrasives UK Limited | Manufacturing | 1951 |
| Sunburst Music Limited | Education | 2001 |
| Tigermoth Productions Limited | Information & communication | 2006 |
| Transm-It Network Solutions Limited | Arts & recreation | 2003 |
| Trig Engineering Limited | Manufacturing | 2021 |
| U Design Treorchy Limited | Wholesale & retail | 2003 |
| Usedcrushers Limited | Wholesale & retail | 2003 |
| W D Lewis (Holdings) Limited | Professional & scientific | 2004 |
| W.D.L. Homes Limited | Construction | 1996 |
| Your Call Limited | Information & communication | 2011 |
| Zagros Civil Engineering Limited | Construction | 2007 |