SpaceX short interest surges to 29% of float as shares hit IPO price
The surge in bearish positions coincides with the stock falling below its initial public offering threshold for the first time since its June debut, raising questions about near-term volatility ahead of employee share lockup expirations.
Short sellers have significantly increased their positions in SpaceX, with approximately 185 million shares now sold short, according to data from provider S3. This volume represents roughly 29 per cent of the company’s publicly tradable float, marking a substantial shift in market sentiment as the stock price retreated to its initial public offering level.
The increase in short interest coincides with SpaceX shares dipping below the $135 threshold for the first time since listing. The stock, which opened trading on the Nasdaq on 11 June 2026 at $150 per share before rising 27 per cent to $172 in early trading, closed at $135.27 following the decline. This move erased the early gains that initially propelled the company to a valuation of approximately $1.77 trillion and a $75 billion capital raise.
Market volatility has been further influenced by structural changes to the index landscape. SpaceX was added to the Nasdaq-100 index on 7 July 2026, following a rule change that allowed companies to join the benchmark just 15 days after their IPOs. Despite this inclusion, investor concerns regarding the company’s debt levels and expenditure on artificial intelligence have contributed to the recent price instability.
Looking ahead, market participants are bracing for additional supply as employee share lockups begin to expire. At least 20 per cent of shares held by current and former employees are set to be released after second-quarter results are disclosed in the coming months. All lockups are scheduled to expire in December 2026, a timeline that has historically contributed to price fluctuations in other megacap debuts.
The current trading environment reflects a broader reassessment of valuation following the company's historic market debut. While the Falcon 9 rocket remains the dominant launch service globally and Starlink continues to expand, the convergence of rising short positions and impending share unlocks suggests a period of heightened sensitivity for the aerospace and technology giant.
