SpaceX's debut saw its opening share price rise over 24% in its first hours of trading on Friday. 

The shares opened at $150 and reached $166.90 at around 12:20 p.m. ET, according to the Associated Press.  At that price, the company has a market value of $2.18 trillion. 

Forbes' real-time estimates put CEO Elon Musk's net worth at $1.1 trillion, making him the world's first trillionaire. 

SpaceX said last week that it would offer 555,555,555 shares for $135 each in its initial public offering. At that price, the offering was expected to raise $75 billion, which would be three times more than that raised by the next highest market debut — Saudi Aramco in 2019. It would give the company a market value of $1.77 trillion, which would put it in sixth place in the S&P 500.  

Musk has said SpaceX is going public now to fund a plan to put satellites and data centers in space, as well as establish a colony on Mars.