SpaceX and Tesla share performance remain the dominant drivers of Elon Musk’s net worth trajectory into late September, with SpaceX alone accounting for roughly 83% of his holdings following its June 2026 IPO. Recent analyst upgrades and modest rebounds in both stocks have lifted estimates from the low $860 billion range in late August to around $929 billion by mid-September, aligning trader consensus with the $900 billion–$1 trillion bracket. Volatility from lock-up releases, restricted Tesla equity tied to continued leadership through 2028, and broader tech sentiment continue to influence daily swings, while upcoming earnings or regulatory updates on AI and space ventures could introduce last-minute catalysts before month-end resolution.