SpaceX has revealed the final size of its blockbuster market debut—and it is even larger than initially expected.
In a filing published on Monday, SpaceX confirmed that the underwriters behind its IPO exercised their full overallotment option, increasing the total amount raised from $75 billion to approximately $85.7 billion. The additional shares were sold directly by the company, bringing the final offering to 638.9 million Class A shares.
“SpaceX today announced the closing of its initial public offering of an aggregate 638,888,888 shares of its Class A common stock, including the full exercise by the underwriters of their overallotment option to purchase an additional 83,333,333 shares of Class A common stock from SpaceX. The issuance of all shares closed on June 15, 2026, bringing the gross proceeds from the initial public offering to SpaceX to approximately $85.7 billion.”
Demand Exceeded Expectations
The additional $10.7 billion came through a mechanism commonly known as a “greenshoe” option. In highly anticipated IPOs, underwriters are often granted the ability to purchase extra shares if investor demand exceeds expectations.
That’s exactly what happened with SpaceX. Banks involved in the offering—including Goldman Sachs, Morgan Stanley, Bank of America, JPMorgan, Citigroup, Barclays, Deutsche Bank, UBS, and others—elected to exercise the option in full, purchasing an additional 83.3 million shares from the company.
The fact that the entire allocation was taken up highlights just how strong investor demand was for shares of Elon Musk’s space and technology giant.
A $2.5 Trillion Company—and Counting
SpaceX began trading on the Nasdaq under the ticker SPCX on June 12, opening at $150 per share after pricing at $135. Shares quickly surged during their debut session and continued climbing on Monday, closing up another 20% at $192.50.
The strong performance pushed SpaceX’s market capitalization above $2.5 trillion, making it one of the most valuable companies in the world only days after going public.
The IPO also propelled Musk to another milestone. With most of his wealth tied to SpaceX and Tesla stock, the rally pushed his estimated net worth above $1 trillion, making him the first person to reach that level on paper.
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