SpaceX's post-IPO lockup structure is unlike anything public markets have seen. Rather than a single 180-day cliff, the company designed a rolling release of roughly 16 tranches stretching from August through December 2026, ultimately freeing more than 6.4 billion shares before Elon Musk himself is permitted to sell a single share in June 2027.
The first and largest tranche arrived on August 6, when 911.5 million Class A shares became eligible for sale. That block alone represented a 143% increase in the tradable float, taking it from roughly 639 million shares to about 1.55 billion shares outstanding. Contrary to widespread expectations of a collapse, the stock rose 6.1% that day and added nearly 16% in the following session, suggesting much of the anticipated selling pressure had already been priced in during the seven-week decline from the June peak of $225.64.
The next test arrives Thursday, August 20, when approximately 320 million additional shares unlock. At Friday's close of $136.71, that tranche carries a notional value of $43.7 billion — equivalent to 3.4 times the day's trading volume of 94.7 million shares. A separate analysis using a $140 close values the same block at $44.8 billion, or 3.5 times Friday's volume of 91.5 million shares. Seven further release rounds remain on the calendar before year-end.