10 Biggest Companies in the world 

 The worlds biggest companies by revenue represent new, faster-growth industries and mature, slower-growth ones ranging from ecommerce and tech devices to oil and retailing. No matter what, each company is a dominant force in its industry. While each of these companies continue to thrive due to their unique advantages as millions of consumers shelter in place. 

These are the 10 biggest companies in the world by 12 month trailing revenue, and it represents a striking diversity of industries .This list is limited to companies that are publicly traded in the U.S or Canada, either directly or through ADRs. Some foreign companies may report semiannually, and so may have longer lag times. We add the caveat that two other companies that otherwise would be added to this list are Saudi Aramco, the Saudi state oil company; and State Grid, the Chinese state-owned electric utility. They were omitted because their stocks are not publicly traded in the U.S or Canada. All the data in this story are provided by YCharts and as of Sept 10,2020.

1) Walmart Inc. (WMT)

Walmart Inc is an American multinational retail corporation that operates a chain of hypermarkets discount department stores and grocery stores from the United States  hypermarkets, discount department stores, and grocery stores from the United States, headquartered in Bentonville, Arkansas. The company was founded by Sam Walton in 1962 and incorporated on October 31, 1969.

 As of  January 31, 2021,Walmart has 11,443 stores and clubs in 26 countries , operating under 54 different names. The company operates under the name Walmart  in the United States and Canada as Walmart de Mexico y Centro América in Mexico and Central America, as Asda in the United Kingdom, as the Seiyu Group in Japan, and as Flipkart Wholesale in India. It has wholly owned operations in Argentina, Chile, Canada and South Africa. Since August 2018, Walmart holds only a minority stake in Walmart Brasil, which was renamed Grupo Big in August 2019, with 20 percent of the company's shares, and private equity firm Advent International holding 80 percent ownership of the company.

 Walmart is the worlds largest company by revenue , with US$548.743 billion, according to the Fortune Global 500 list in 2020. It is also the largest private employer in the world with 2.2 million employees. It is a publicly traded family-owned business , as the company is controlled by the Walton family. Sam Walton's heirs own over 50 percent of Walmart through both their holding company Walton Enterprises  and their individual holdings. Walmart was the largest United States grocery retailer in 2019, and 65 percent of Walmart's US$10.329 billion sales came from U.S operations. 

Walmart was listed on the New York Stock Exchange in 1972. By 1988, it was the most profitable retailer in the U.S., and it had become the largest in terms of revenue by October 1989. The company was originally geographically limited  to the South and the lower Midwest, but it had stores from coast  to coast by the early 1990s. Sam's Club opened in New Jersey in November 1989, and the first California outlet opened in Lancaster, in July 1990. A Walmart in York, Pennsylvania, opened in October 1990, the first main store in the Northeast. 

Walmart's investments outside the U.S have been mixed results. Its operations and subsidiaries in Canada, Unites Kingdom, Central America, South America, and China are highly successful, but its ventures failed in Germany and South Korea.