SpaceX stock climbed on August 6 even as more than 911 million insider shares became eligible for trading, bucking a well-established pattern in which lockup expiries trigger sell-offs as early investors and insiders seek to diversify concentrated positions or lock in gains after the mandatory post-IPO restriction period ends.

SPCX closed in the $114 to $115 range, rising approximately 6% from the prior session's close of $108.27. The gain came on the same day that 911.5 million shares held by insiders and early investors were unlocked, effectively more than doubling the publicly tradable float in a single trading session.

SpaceX's Staggered Lockup Structure

SpaceX went public in June 2026 at $135 per share. The company deliberately constrained its initial float to roughly 639 million shares, accounting for less than 5% of total shares outstanding.

Rather than using the standard single 180-day lockup common to most IPOs, SpaceX implemented a staggered release schedule. The first tranche, which has now expired, unlocked 911.5 million shares. Additional tranches are scheduled for release through December 2026 and beyond. Elon Musk's personal stake and certain executive holdings will remain locked until mid-2027.

The lockup structure also included an accelerator clause: an additional 10% of shares could have unlocked early if SPCX traded at least 30% above the IPO price for multiple consecutive days. With the stock sitting roughly 15% below its IPO price on expiry day, that trigger was not activated.

Atypical Post-Lockup Rally

SPCX had experienced significant volatility since its market debut. After peaking above $225, the stock lost more than half its value, pushed lower by a combination of broader market turbulence and company-specific pressures following earnings reports.

Historical precedent for a bearish lockup expiry includes Facebook's 2012 lockup expiry, which sent shares tumbling nearly 7% in a single session. SpaceX's stock moved in the opposite direction.

Heavy trading volume indicated that newly unlocked shares attracted willing buyers. At roughly 20% below its IPO price and more than 50% off its highs, the valuation presented a different proposition than when shares traded above $200.

Upcoming Lockup Releases

While the first tranche has expired, subsequent releases will continue introducing new shares into the market through the end of 2026. Holdings belonging to Musk and key executives will not enter circulation until mid-2027.

The spread between the current trading price and the $135 IPO level may also serve as a psychological ceiling. Insiders who saw paper gains retreat from $225 to $108 could respond differently depending on whether the stock is approaching or retreating from the IPO price when the next tranche unlocks. Each successive tranche will test whether demand can continue absorbing the incremental supply, or whether selling pressure from diversifying holders eventually outweighs buyer interest.