**SpaceX stock performance since its June 2026 IPO remains the dominant driver of Elon Musk’s net worth, with his roughly 38-42% stake (including options) comprising over 80% of his fortune and locking up sales until mid-2027.** After peaking above $225 per share and briefly pushing his wealth past $1.3 trillion, SPCX corrected sharply amid broader tech sell-offs tied to AI infrastructure spending concerns and interest rate uncertainty, settling near $148 by early September with Musk’s estimated net worth around $900-950 billion per Forbes and Bloomberg trackers. Tesla shares add secondary volatility but represent a smaller portion. With the September 30 resolution just weeks away and the two leading bins ($800-900B and $900B-1T) closely matched, traders appear to price in typical short-term equity swings around current levels rather than a decisive break higher or lower, reflecting the concentrated, illiquid nature of his primary holdings and limited near-term catalysts.