| 201 Cathedral Road (Cardiff) Management Limited | Professional & scientific | 1990 |
| 31 Plymouth Road (Penarth) Management Company Limited | Professional & scientific | 2000 |
| 44 Victoria Road Management Company Limited | Real estate | 1996 |
| 66 Pembroke Road (Clifton) Management Co. Limited | Households | 1982 |
| Allsorts Cardiff Limited | Arts & recreation | 1997 |
| Altus IT Ltd | Information & communication | 2007 |
| Arcot Street Management Company Limited | Real estate | 1999 |
| Beakguard Limited | Hospitality | 1980 |
| Beardsley Upvc Products Limited | Manufacturing | 2002 |
| Beauty Within Penarth Limited | Other services | 2003 |
| Belmont Site Services Limited | | 1973 |
| Besson National Brass Band Championships of Great Britain Limited | Administrative & support | 2005 |
| Birch Glazing Limited | Construction | 2004 |
| Blue Lobster Properties Limited | Real estate | 2017 |
| Bondouter Limited | | 1986 |
| Brass Band Players Ltd | Information & communication | 1999 |
| Brevedon Limited | Wholesale & retail | 2001 |
| Brooks and Gilbert Limited | Manufacturing | 1999 |
| Byrom (South Wales) Limited | Manufacturing | 1997 |
| Castle Leisure Ltd | Arts & recreation | 1911 |
| Cathedral Court (Cardiff) Limited | Households | 1987 |
| Chill Forge Ltd | Professional & scientific | 1995 |
| Chubs Property Management Services Ltd | Hospitality | 2006 |
| City Centre Cars Limited | Information & communication | 1990 |
| Colin Stevens Turf Accountants Limited | Arts & recreation | 1979 |
| Commercial Radio Systems Limited | Information & communication | 1993 |
| Compservices Limited | Professional & scientific | 1988 |
| Corelli Solutions Limited | Wholesale & retail | 1996 |
| Cottrell Park Ltd | Arts & recreation | 1991 |
| County Focus Limited | | 1990 |
| Crafty SEW and SEW Limited | Wholesale & retail | 2000 |
| Crwys Electrics Limited | Wholesale & retail | 1964 |
| Custom GIS Limited | Information & communication | 2000 |
| D R & E G Davies (Holdings) Ltd | Financial services | 2014 |
| Data Powertools Limited | Wholesale & retail | 1978 |
| Dave Edwards Studio Limited | Information & communication | 1988 |
| Derek Crouch Construction Company Limited | Professional & scientific | 1965 |
| Dragon Air Conditioning Limited | Energy | 2003 |
| Elias RE Data Limited | Information & communication | 2025 |
| Evolve Business Excellence Limited | Administrative & support | 2004 |
| Fairoak Mews (Ground Management) Limited | Households | 1995 |
| Farmers Barns Limited | Hospitality | 2013 |
| Fast Food Pizza BOI Ltd | Hospitality | 2026 |
| Fernbury Limited | Wholesale & retail | 2000 |
| Filco Supermarkets Limited | Wholesale & retail | 1995 |
| Fontygary Leisure Holdings Limited | Professional & scientific | 2003 |
| Fontygary Parks Limited | Arts & recreation | 1960 |
| Franklin Davies (IFA) Limited | Financial services | 2007 |
| Fresh Catch Films Ltd. | Information & communication | 2004 |
| Frontpower Insulation Limited | Wholesale & retail | 1988 |
| G. Marino & Company Limited | Professional & scientific | 2001 |
| Gary and SUE Photography Limited | Professional & scientific | 2000 |
| Geoff Burke Flooring Services Limited | Construction | 1999 |
| Gitto Estates Ltd | Real estate | 2004 |
| Glidetree Limited | Manufacturing | 1981 |
| Golden Links Limited | Information & communication | 2004 |
| Green Circle Aggregates Limited | Mining & quarrying | 2004 |
| Green Circle UK Ltd | Professional & scientific | 2003 |
| Gwyn G Jones & Sons Limited | Construction | 2002 |
| H T Advance Hire Limited | Administrative & support | 2025 |
| Harris Fine Meats Ltd | Wholesale & retail | 2004 |
| Haumda Ltd | Wholesale & retail | 2025 |
| Helen Petherick Limited | Health & social care | 2002 |
| Hinds Garages Limited | Wholesale & retail | 1974 |
| Horan Construction Limited | Construction | 1976 |
| Horan Surfacing Limited | Construction | 1970 |
| Howell Management Ltd | Professional & scientific | 1981 |
| Imtiaz & Sons Ltd | Real estate | 2019 |
| Insurebowls Limited | Hospitality | 1995 |
| J R Jones & Co Limited | Professional & scientific | 2003 |
| J.B. Rich Building Services Limited | Wholesale & retail | 1987 |
| J.F.C. Construction Services Limited | Construction | 1997 |
| JAN Stedman Covers Limited | Transport & logistics | 1990 |
| Jeff White Motors Limited | Wholesale & retail | 1989 |
| Juno Strategies Limited | Financial services | 2025 |
| K a Estates Limited | Real estate | 2008 |
| K S Barry (Plumbing & Heating) Limited | Construction | 2000 |
| Kapitol Promotions Limited | Administrative & support | 2000 |
| Kevin Demirci Properties Limited | Real estate | 2014 |
| KSM Charger Limited | Wholesale & retail | 2025 |
| L.R.E. Waddle Engineering and FAN Company Limited | | 1907 |
| L.T.S. Technology Limited | Information & communication | 2001 |
| Lazarou Brothers Limited | Extraterritorial | 2001 |
| Lazarou Hair Limited | Extraterritorial | 2001 |
| Marine Tax Services (Cardiff) Limited | Professional & scientific | 1978 |
| Matchideal Limited | | 1992 |
| Media Production Support Ltd | Administrative & support | 2007 |
| Mepco Limited | Real estate | 1999 |
| Mercantile Management & Administration Limited | Information & communication | 1998 |
| MLJ Account Services Limited | Professional & scientific | 2006 |
| Mouldings Limited | Manufacturing | 1990 |
| Murray Healthcare Group Limited | Health & social care | 2003 |
| N & J a Services Ltd | Other services | 2004 |
| Office Objects Limited | Information & communication | 1999 |
| Oriel Makers Limited | Wholesale & retail | 1999 |
| P.W. Millar Limited | Wholesale & retail | 1970 |
| Paul Fairweather & Co. Group Limited | Hospitality | 1980 |
| Paul Fairweather & Company Limited | Transport & logistics | 1965 |
| Penarth Funeral Directors Limited | Other services | 1985 |
| Petbern Limited | Real estate | 1964 |