Elon Musk's new stock rose 19 percent on the New York Stock Exchange on Friday. On Monday, the stock's second day of trading, it has risen 6.3 percent so far.
SpaceX is now valued at $2.252 billion (SEK 21.107 billion). The company lands in seventh place among the world's most valuable listed companies, according to the website Companiesmarketcap.
SpaceX is closely followed by Taiwanese chip maker TSMC in sixth place.
After several investors exercised options in the agreement, the value of the IPO increased to $85.7 billion - compared to a previously estimated $75 billion.
