When a company’s lockup period expires and a flood of insider shares hits the open market, the stock usually doesn’t go up. SpaceX decided to skip that particular tradition.
SPCX closed around $114 to $115 on August 6, climbing approximately 6% from the prior session’s close of $108.27. That rally came on a day when 911.5 million shares held by insiders and early investors became eligible for sale, effectively more than doubling the publicly tradable float in a single session.
The math behind the lockup
SpaceX went public in June 2026 at $135 per share. The initial float was deliberately constrained at roughly 639 million shares, representing less than 5% of total shares outstanding.
Rather than adopting the standard single 180-day lockup that most IPOs use, SpaceX structured a staggered release schedule. The first tranche, the one that just expired, unlocked 911.5 million shares. Additional tranches are set to trickle out through December 2026 and beyond, with Elon Musk’s personal stake and certain executive holdings remaining locked until mid-2027.
There was also an accelerator clause baked into the structure: an additional 10% of shares could have unlocked early if SPCX traded at least 30% above the IPO price for multiple consecutive days. Given that the stock was sitting roughly 15% below its IPO price on expiry day, that trigger was never close to being pulled.
A rally that shouldn’t have happened
SPCX had been on a rough ride since its market debut, peaking above $225 before losing more than half its value. A combination of broader market volatility and company-specific pressures following earnings reports had pushed the stock well below its IPO price.
The textbook example of a bearish lockup expiry is Facebook’s 2012 lockup expiry, which sent shares tumbling nearly 7% in a single session.
SpaceX’s stock did the opposite. Heavy trading volume suggested that the newly unlocked shares found willing buyers. At roughly 20% below its IPO price and more than 50% off its highs, the risk-reward calculus looked different to buyers than it did when shares were trading north of $200.
What the staggered schedule means going forward
The first lockup tranche is done, but subsequent releases will continue to feed new shares into the market through the end of 2026. Musk’s own holdings and those of key executives won’t enter circulation until mid-2027.
The gap between the current price and the IPO level of $135 also creates a psychological ceiling. Insiders who watched their paper gains evaporate from $225 down to $108 may behave differently depending on whether the stock is approaching that IPO price or retreating from it when the next tranche unlocks.
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