SpaceX (SPCX) priced its IPO at $135 and opened its first trading day at $161. It raced to $225.64 before sellers took over. It now sits at $148.68, below its $161 first-day close and about 10% above the $135 IPO price. That erosion happened while the company was winning a $946 million NASA contract modification and reporting Q2 revenue up 92% year-over-year. The drag is not the business. It is the calendar.
What the Unlock Schedule Actually Looks Like
Shares are releasing in stages: 20% on the second full trading day after Q2 earnings, then 7% tranches on fixed dates through October, followed by a Q3 earnings-triggered release of roughly 28%, with the remaining 180-day shares freeing up December 8, 2026. Up to 328.4 million shares unlock on each of October 9 and October 24, with about 1.3 billion more unlocking on the second full trading day after Q3 results.
Rather than one cliff, SpaceX uses a staggered release, with the biggest tranches tied to earnings reports. That Q3-linked wave is the one to watch most closely. Its exact date depends on when SpaceX reports, but it lands in the October-to-November window and dwarfs anything that has hit the float so far.
Elon Musk holds roughly 6.4 billion shares that are subject to a longer, roughly one-year lockup that runs into mid-June 2027. That is critical context: the supply pressure traders are navigating through December involves pre-IPO investors and employees, not Musk.
Two Forces Pulling in Opposite Directions
The unlock schedule does not operate in a vacuum. SpaceX’s weighting in the Nasdaq-100 rose to about 2.82% from roughly 1.28% as part of the index’s quarterly rebalance, as reported by Bloomberg and others. Market estimates suggested the rebalance could result in approximately $15.5 billion to $22 billion of passive buying in SPCX shares. That buying largely occurred around the September 18 close, so the mechanical bid from QQQ and its peers is mostly behind us now.
Index funds bought because their mandates required it, not because SpaceX produced stronger earnings or reduced execution risk. Once the rebalance is complete, that compulsory buyer largely disappears, and attention returns to Starlink growth, Starship execution, and AI spending.
As additional locked shares enter public circulation, the index weight could rise further at future index resets, potentially triggering another round of passive demand. Each October tranche widens the float, which can affect future weighting calculations. That is the structural dynamic that makes December 8 a date worth circling now, not just in November.
The Shotwell Filing
SpaceX President and COO Gwynne Shotwell filed to sell 342,170 shares, with the proposed transaction valued at nearly $52 million. The transactions were made under a Rule 10b5-1 trading plan adopted June 23, 2026, a pre-scheduled plan, not a discretionary decision. The filing is not a statement that a sale has been made but is an intent to sell. Routine as it may be procedurally, it is one more data point that insiders with low cost bases are using the current price to exit, not accumulate.
What to Watch
- October 9 and October 24: Each date releases up to 328.4 million shares. Volume and price action on and around those sessions will show whether the market can absorb supply without material deterioration.
- Q3 earnings date: The largest single tranche, roughly 1.3 billion shares, unlocks on the second full trading day after results. An upside beat could cushion the selling pressure. A miss amplifies it.
- $135 IPO price: SPCX trades at $148.68 today. The IPO price sits $14 below the current quote. That level is where long-term holders with a cost basis near zero have the least incentive to hold.
The supply situation resolves progressively, not all at once. October’s two tranches are manageable in isolation. The Q3 earnings unlock is a different order of magnitude and deserves the most attention between now and year-end.
