Energy and Utilities

• Wales & West Utilities
  Wales & West Utilities
  Wales and West Utilities operates the gas distribution network of the National Transmission System in the Wales and South West England regions of the United Kingdom...
  
   - headquarters in Newport.
• Welsh Water
  Welsh Water
  Dŵr Cymru Welsh Water is a company which supplies drinking water and wastewater services to most of Wales and parts of western England.It is regulated under the Water Industry Act 1991.-History:...
  
   - headquarters in Nelson.

Financial services

• Admiral Group plc
  Admiral Group
  Admiral Group plc is a motor insurance company with its head office in Cardiff, Wales. Listed on the London Stock Exchange, it is a constituent of the FTSE 100 Index.-History:...
  
   - a motor insurance company with its head office in Cardiff. Wales' only FTSE 100 company.
• Julian Hodge Bank
  Julian Hodge Bank
  Julian Hodge Bank is a small commercial bank in the United Kingdom. It is named after Sir Julian Hodge. The bank was formed in 1987, and is headquartered in Cardiff, Wales, the only independent bank headquartered in Wales...
  
  
• Principality Building Society
  Principality Building Society
  Principality is a Welsh building society based in Cardiff, the capital of Wales. With assets of just under £6bn it is the largest building society in Wales and the seventh largest in the United Kingdom. Principality Building Society is mutual, which means it is owned by its members rather than...
  
  

Food and Beverages

• Brains Brewery
  Brains Brewery
  Brains is a regional brewery founded in 1882 in Cardiff, Wales by Samuel Arthur Brain. The company owns over 250 pubs across South Wales, Mid Wales, the West Country and particularly in Cardiff...
  
   - founded and headquartered in Cardiff.
• Breconshire Brewery
  Breconshire Brewery
  Breconshire Brewery is a brewery in Brecon in Powys, Wales. The head brewer was Justin "Buster" Grant, formerly of Brakspear Brewery.Named after the original 1841 Breconshire Brewery established by Mordecai Jones, the new brewery since its establishment in 2002, has received numerous awards at...
  
   - based in Brecon, Powys.
• Penderyn Distillery - located in Brecon Beacons National Park.
• Peter's Food Services
  Peter's Food Services
  Peter's Food Service is a Bedwas, Wales based baker and supplier of pies, pasties, slices, sausage rolls and factored products in to retail, food service, catering and hospitality outlets across the United Kingdom...
  
   - based in Bedwas.

Hotels

• Celtic Manor Resort
  Celtic Manor Resort
  The Celtic Manor Resort is a golf-centric hotel and leisure resort in Newport, south Wales. It consists of two adjoining hotels, a country inn, two golf and country clubs, and a multi-purpose conference centre...
  
  , Newport.
• St David's Hotel & Spa
  St David's Hotel & Spa
  St David's Hotel & Spa is a five-star hotel situated in Cardiff, Wales, just off the A4232 road, and close to Cardiff Bay railway station. It was the first five-star hotel in Wales. The building features a sweeping sail-topped roof and a lofty atrium lobby....
  
  , Cardiff - Wales' first 5-star hotel.

Manufacturing

• howies
  Howies
  howies is a clothing company originally based in Cardigan Bay, Wales.The company was founded by Clare and David Hieatt in 1995 and produces eco-friendly T-shirts, jeans and sportswear, and aims to have ethically correct practices. howies sometimes use natural fabrics as alternatives to...
  
   - ethical clothing manufacturers based in Cardiganshire.
• Williams Medical Supplies - headquarters in Rhymney.

Retail

• Iceland (supermarket)
  Iceland (supermarket)
  Iceland is a supermarket chain in the United Kingdom and Ireland. Iceland's primary product lines include frozen foods, such as frozen prepared meals and frozen vegetables - hence the name of the company...
  
   - headquarters in Deeside.
• Leekes
  Leekes
  Leekes is a Welsh based retailer, with seven stores based in South Wales, South West England and The Midlands.The company was established by James Henry Leeke in the Rhondda in 1897...
  
   - headquarters in Talbot Green.

Sports and recreation

• Cardiff City Football Club
  Cardiff City F.C.
  Cardiff City Football Club are a Welsh professional football club based in Cardiff, Wales. The club competes in the English football pyramid and is currently playing in the Football League Championship. Cardiff City is the best supported football club in Wales, averaging approximately 22,500 for...
  
  .
• Colwyn Bay Football Club
  Colwyn Bay F.C.
  Colwyn Bay F.C. are a Welsh football club, as of the 2011–12 season are playing in the Conference North. Nicknamed the Seagulls, the club play at Llanelian Road in Old Colwyn.-History:...
  
  .
• Merthyr Town Football Club
  Merthyr Town F.C.
  Merthyr Town Football Club is a Welsh semi-professional football club based in Merthyr Tydfil, Wales. For the 2011–2012 season the club will be playing in the Western Football League Premier Division at Penydarren Park in Merthyr....
  
   - reformed in 2010 after liquidation.
• Newport County Association Football Club
  Newport County A.F.C.
  Newport County Association Football Club are a professional football club based in the city of Newport, south Wales, who currently play in the Conference National, the highest level of the National League System and fifth highest of the overall English football league system...
  
   - reformed in 1989 after bankruptcy.
• Swansea City Association Football Club
  Swansea City A.F.C.
  Swansea City Association Football Club are a Welsh professional football club based in Swansea, Wales. One of the most successful clubs in Welsh football, it has won 10 Welsh Cups and led the English Football League First Division in December 1981, before finishing the season in 6th position...
  
  .
• Wrexham Football Club - faced a winding-up order in 2011.

Transport

• Cardiff Bus
  Cardiff Bus
  Cardiff Bus is the dominant operator of bus services in Cardiff, Wales and the surrounding area, including Barry and Penarth. Its hub is Cardiff central bus station...
  
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• Cardiff Waterbus
  Cardiff Waterbus
  The Cardiff Waterbus celebrated its 10 year anniversary in April 2010. The fleet have clocked up 50,000 miles since operating on the routes, carrying an estimated 1,000,000 passengers.-External links:**...
  
  .
• Edwards Coaches
  Edwards Coaches
  Edwards Coaches is a family-owned coach company based in Llantwit Fardre, near Pontypridd in South Wales.Since 1925, the Edwards family has operated buses and coaches in South Wales. It was founded by George Edwards. Over recent years, the company has expanded by acquiring several smaller local firms...
  
   - headquarters in Pontypridd.
• First Cymru Buses Ltd
  First Cymru
  First Cymru Buses Ltd. is a provider of public transport bus services in South Wales. First Cymru was formed from a number of privatised former bus companies, including South Wales Transport. Its headquarters are in Penlan, Swansea...
  
   - headquarters in Penlan, Swansea.
• Newport Transport
  Newport Transport
  Newport Transport is the main provider of bus services in Newport, South Wales, under the brand Newport Bus. Formerly a council department, it came into being as a separate corporate entity in 1986, following the Transport Act 1985...
  
  .
• Veritair Aviation Limited
  Veritair
  Veritair Aviation Limited is a helicopter charter company based at Cardiff Heliport, in Cardiff, Wales. It operates year round charter and contract helicopter services throughout United Kingdom and Europe...
  
   - based at Cardiff Heliport.

Miscellaneous

• Woodham Brothers Ltd - scrap metal merchants based at Barry Docks.