Here is the list of biggest companies in the world by it market capital (September 2019)
1. Microsoft
Microsoft Corporation is an American multinational technology company with headquarters in Redmond, Washington. It develops, manufactures, licenses, supports, and sells computer software, consumer electronics, personal computers, and related services.
2. Apple
Apple Inc. is an American multinational technology company headquartered in Cupertino, California, that designs, develops, and sells consumer electronics, computer software, and online services.
3. Amazon
Amazon.com, Inc., is an American multinational technology company based in Seattle, Washington, that focuses on e-commerce, cloud computing, digital streaming, and artificial intelligence.
4. Google
Google LLC is an American multinational technology company that specializes in Internet-related services and products, which include online advertising technologies, search engine, cloud computing, software, and hardware.
5. Facebook
Facebook, Inc. is an American online social media and social networking service company based in Menlo Park, California. It was founded by Mark Zuckerberg, along with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes.
6. Berkshire Hathaway
Berkshire Hathaway is headquartered in Omaha, Nebraska and was originally a company comprised of a group of textile milling plants. Buffett became controlling shareholder of the company in the mid-1960s and began a progressive strategy of diverting cash flows from the core business into other investments.
7. Alibaba
Alibaba Group Holding Limited is a Chinese multinational conglomerate holding company specializing in e-commerce, retail, Internet, and technology.
8. Tencent
Tencent Holdings Limited is a Chinese multinational conglomerate holding company founded in 1998, whose subsidiaries specialise in various Internet-related services and products, entertainment, artificial intelligence and technology both in China and globally.
9. Visa
Visa Inc. is an American multinational financial services corporation headquartered in Foster City, California, United States. It facilitates electronic funds transfers throughout the world, most commonly through Visa-branded credit cards, gift cards, and debit cards.
10. JPMorgan
JPMorgan Chase & Co. is an American multinational investment bank and financial services holding company headquartered in New York City. JPMorgan Chase is ranked by S&P Global as the largest bank in the United States and the sixth largest bank in the world by total assets, with total assets of US$2.73 trillion.