SpaceX Joins Nasdaq-100 Index Following Record-Breaking IPO

Space Exploration Technologies Corp. joined the Nasdaq-100 index on July 8, 2026, marking the fastest addition of a major company to the index following an initial public offering in history. The company went public on June 12, raising $75 billion and pushing founder Elon Musk's personal fortune past $1 trillion. The rapid inclusion was enabled by a Nasdaq rule change that allowed large-cap companies to enter the index after 15 trading days rather than the standard three months.

This integration triggers passive buying by mutual funds and exchange-traded funds, including those within American 401(k) retirement accounts. JPMorgan estimates that index-tracking funds could purchase approximately $4.3 billion in shares. Despite a market valuation between $1.77 trillion and $2.1 trillion, the company's index weighting is expected to remain around 1% because SpaceX sold less than 5% of its total shares in the IPO and employee lockups limit the free float.

SpaceX also joined the CRSP US Total Market Index, the Russell 1000, and MSCI indexes. However, S&P Global maintained stricter requirements, stating it will wait at least 12 months and require profitability before considering the company. Some financial experts warn the stock is overvalued given its price-to-sales ratio, noting that shares have experienced volatile trading since the IPO.