SpaceX has adopted a tiered insider lockup structure instead of the standard 180-day freeze, allowing pre-IPO shareholders to sell portions of their stock in staggered increments over months rather than all at once when the lockup expires. The approach, detailed in the company’s IPO prospectus filed in May 2026, is designed to spread insider selling across multiple dates and milestones, metering supply to the market rather than creating a potential wave of shares.
Under the tiered structure, insiders can sell up to 20% of their eligible locked-up shares after SpaceX reports its first quarterly earnings as a public company. If the stock trades at least 30% above its IPO price during that period, they can sell an additional 10%, according to Morningstar’s analysis of the filing.
Beyond the earnings-based releases, SpaceX built in a rolling schedule with fixed dates. An additional 7% of locked-up shares unlock at each of five intervals: 70, 90, 105, 120, and 135 days after the IPO, Morningstar reported. When the company reports its second quarterly earnings—for the third quarter—another 28% becomes available for sale. Whatever remains fully unlocks at the standard 180-day mark.
Why the Tiered Approach Matters
The traditional lockup period exists to prevent excessive volatility when insiders suddenly gain the ability to sell. SpaceX’s staggered approach accomplishes something different: it accelerates the growth of freely tradeable shares—what the market calls “float”—while avoiding a single cliff date when all insiders can dump stock simultaneously.
This matters because SpaceX went public with an extremely small float of just 4% of total shares, according to Morningstar. That tiny float made the company initially ineligible for inclusion in major stock indexes under old rules. By spreading out the release of shares through the tiered lockup, SpaceX can expand its float faster, which directly affects its eligibility and weighting in indexes like the Nasdaq-100. The company qualified for Nasdaq’s new “fast-entry” rule, gaining inclusion after just 15 days of trading rather than the traditional three-month wait, CNBC reported.
Elon Musk, who controls 85.1% of voting power in SpaceX, is not eligible for any of the early-release provisions. He and other “certain significant investors” have agreed to a 366-day lockup period, per the IPO filing cited by Morningstar. This longer restriction on major shareholders underscores that the tiered structure primarily affects pre-IPO investors and employees, not the founder.
Staggered lockups are not new. Airbnb, Reddit, DoorDash, and Robinhood all negotiated shortened or tiered lockup periods in recent IPOs, according to research from Cooley LLP on early lock-up releases. However, the scale and complexity of SpaceX’s structure is unusual for a mega-IPO.
When lockup periods end on traditional schedules, stock prices can face pressure. Airbnb shares fell more than 6% in the first hour of trading when its lockup expired on May 17, 2021, according to IHS Markit. Even more dramatically, Facebook shares fell more than 40% from their offering price by the end of its 2012 IPO lockup, though they later recovered, Morningstar noted. By spreading releases across months, SpaceX aims to avoid a single date when the market braces for a flood of selling.
Whether the tiered approach will succeed in smoothing volatility remains to be seen. The structure gives SpaceX management and major shareholders multiple opportunities to sell before the full 180-day mark, while the company’s rapid index inclusion creates forced buying pressure from passive funds. The interplay between these forces—insider selling, index demand, and the limited float—will likely shape SPCX trading dynamics through the remainder of 2026.
Sources
- Morningstar — detailed breakdown of SpaceX’s tiered lockup structure, comparison to Facebook and other precedents, and index inclusion mechanics
- CNBC — SpaceX’s phased lockup approach and Nasdaq-100 fast-entry rule implications
- Cooley LLP — overview of early lock-up releases and staggered structures in recent IPOs including Airbnb, Reddit, and DoorDash
- IHS Markit — Airbnb lockup expiration impact on stock price
