Here's a time line of Elon Musk life
1971 - On June 28 he was born in Pretoria (South Africa).
2002 - In June 2002, Musk founded his third company, Space Exploration Technologies SpaceX.
2004 - In April 2004 Elon Musk decided to invest $ 6.3 million in Tesla Motors. He was not the only investor, but he contributed 98% of the financing.
2016 - In 2016 SolarCity merged with Tesla, Inc.
2016 - The Boring Company (The Tunneling Company) is an excavation and infrastructure company founded by Elon Musk in late 2016, after first mentioning the idea on his Twitter account.
2017 - Neuralink is a nanobiotechnology company founded by Musk that aims to integrate the human brain with artificial intelligence. The company was founded in 2016 and became known to the general public for the first time in March 2017.
If you have time, you should read more about this incredible human being on his Wikipedia entry.