With a capitalization of $ 2,458 billion, Saudi Aramco specializing in the extraction and refining of oil and gas is currently the largest market capitalization in the world.
It is one of the world leaders in oil production and reserves which has subsidiaries all over the world and collaborates with other large companies in this sector such as Total and Sinopec.
This company is owned by Saudi Arabia and its headquarters are based in Dahran.
Number two in this ranking with a market capitalization of $ 2,213 billion is the US giant Apple in the electronics and computer sector. Apple was still number one in the ranking a few years ago.
The group has thousands of offices, brand stores and service centres around the world and employs 132,000 people.
With a capitalization of $ 1,653 billion, Microsoft comes third. The group was created in 1975 by Bill Gates and is one of the leaders in the PC software sector, particularly thanks to the Windows operating system.
The company is based in Washington, United States.
While it occupied the first place in the ranking in January 2019, this company is now worth $ 1,596 billion and is fourth in this ranking.
The group specializes in online retailing through its international platform which delivers worldwide.
Amazon employs over 647,500 people and has $ 162 billion in assets for $ 232 billion in revenue.
This Thai company has a capitalization of 1,435 billion dollars and operates in electronics and automation.
The group was created in 1971 in Thailand and has continued to grow ever since.
In sixth place is the parent company of Google, the Alphabet Inc. group with $ 1,203 billion in capitalization and which operates in the web sector.
The group has more than thirty subsidiaries and services including YouTube, Android and the Google search engine , and its headquarters are based in California.
With a capitalization of $ 834 billion, Tesla Inc. in the automotive and solar industry sector ranks seventh.
It's the worldwide leader in the construction of electric vehicles. The company was established in 2003 and is headed by Elon Musk who has been its main shareholder since 2004 and has helped it grow.
Tesla's head office is located in California, United States.
Social media pioneer Facebook with $ 757 billion in capitalization is the eighth most expensive company in the world.
Created in 2004, this network has over 2 billion visits every day and is constantly growing in popularity. Its annual profit is $ 22 billion.
Its head office is based in Menlo Park, California, USA.
In ninth and penultimate place in this ranking we find the company Tencent with a market capitalization of 738 billion dollars in the social networks, internet and mass media sector.
It's a Chinese venture capital firm which is an investment conglomerate and one of the largest companies in the gaming industry. It was established in 1998 and its head office is based in Shenzhen in the Nanshan district.
Finally, last in our ranking of the 10 largest market capitalizations in the world, another Chinese group, Alibaba, with a capitalization of 620 billion dollars.
This internet giant specializes in e-commerce, online auction hosting, money transfer and mobile commerce.
It's one of the largest e-commerce platforms in China and in the world thanks to the diversity of its offer and its attractive prices.
The company was established in 1999 and provides services to consumers and businesses through web portals as well as electronic payment services, a customer search system and cloud computing.
Its headquarters are based in Hangzhou, China.