Australia's largest companies

1. Commonwealth Bank of Australia (CBA) - Australia's largest bank.

2. BHP Billiton - It is one of the largest mining companies in the world and is engaged in the production and trading of resources such as iron ore, coal, oil and natural gas.

3. Woolworths Group - is Australia's largest retail company and includes a range of businesses such as supermarkets, alcohol outlets, petrol stations and hotel chains.

4. Wesfarmers - It is one of Australia's largest companies and operates in a variety of sectors such as retail, industrial, energy and financial services. It is especially known for its Coles supermarket chain and Bunnings Warehouse DIY stores.

5. Telstra Corporation - is Australia's leading company in the communications industry and operates as a provider of telecommunications services, mobile communications and internet.

6. Westpac Banking Corporation - It is one of Australia's four major banks and offers retail banking, corporate banking, insurance and financial services.

7. ANZ Banking Group - ANZ, also known as the Australia and New Zealand Banking Group, is an international bank operating in Asia, the Pacific and Europe.

8. National Australia Bank (NAB) - It is one of Australia's four major banks and offers retail banking, corporate banking, insurance and financial services.

9. Macquarie Group - is a global financial services company headquartered in Australia and operates across a range of sectors including asset management, banking, financial advisory and capital markets.

10. Qantas Airways - is the national airline of Australia and one of the oldest airlines in the world. It carries passengers and cargo on international and domestic lines.