Morningstar equity analyst Nicolas Owens expects most available shares to come to market because existing holders have low cost bases and long holding periods. Early investors and employees who acquired stakes at a fraction of the $135 IPO price sit on massive paper gains, creating a powerful incentive to realize returns and diversify. Institutional concentration amplifies the overhang: as of June 30, Alphabet held 551.2 million shares, Fidelity 302.6 million, Gigafund 171.8 million, and Saudi Arabia's Public Investment Fund 154.1 million — each position alone dwarfing a typical day's volume.
Musk's own 48.4% stake, valued above $900 billion at current prices, remains frozen under a 366-day founder lockup that expires roughly one year from the June 11 prospectus date. His holdings include 849.5 million Class A shares and 3.92 billion Class B shares held through trusts, plus 1.3 billion restricted Class B shares and 350 million Class B options. The dual-class structure gives him over 82% voting control regardless of economic ownership.
Passive index demand provides a structural counterweight. As the float expands, SpaceX's weight in benchmark indices rises, forcing mechanical buying from index funds that can absorb a portion of the new supply. The more attractive positioning window, according to lockup analysts, may not open until October through January, once the largest tranches have been digested and volume declines without the stock making new lows.