SpaceX's Post-IPO Lockup Calendar Is the Real Story — Not Opening Day Gains

SpaceX stock surged more than 19% on its first day of public trading, cementing what is now the largest IPO in history. But veteran derivatives strategist Chan Ahn — formerly the equity derivatives structuring head at Goldman Sachs, JPMorgan, and Credit Suisse, and now founder of private equity firm Tessera — says the opening-day pop is almost beside the point. The lockup expiration schedule is what will determine where SpaceX actually trades over the next six months.

The numbers explain why. Despite the record-breaking IPO, only about 4.3% of SpaceX shares are currently in public float. More than 95% remain locked up — held by early investors, employees, and insiders. Elon Musk alone controls roughly 42% of the company, a stake he agreed to keep locked until June 2027, making him the world's first trillionaire on paper but limiting his near-term ability to cash out.

The unlock schedule is staggered but dangerously front-loaded. There are five time-based releases, each unlocking roughly 7% of insider shares, kicking off at the 70-day mark and running through day 135. Additional unlocks are tied to the company's first two earnings calls, and there's a bonus trigger if the stock climbs 30% above its IPO price before the first earnings print. Ahn's projections are striking: available shares will roughly double by late August, grow sixfold by end of September, and reach about one-third of the company by Halloween. By the 180-day mark in December, roughly 58% of SpaceX will be tradable — a 13-fold expansion of the float in just six months.

The concentration of unlocks between September and November is what Ahn flags as underappreciated risk. Even if early investors remain bullish on SpaceX long-term, structural pressures — decades of illiquid holdings, portfolio concentration — will push many to sell simply to diversify. Circle offers a cautionary data point: its stock nearly tripled on debut day and hit an all-time closing high of $263.45 that same month, only to collapse into the $80s by its 180-day lockup expiration, where it has traded roughly a year later.