SpaceX Share Float Set to Expand Dramatically as Lockup Restrictions Lapse This Fall

Key Points

Space Exploration Technologies (NASDAQ: SPCX) completed a highly successful initial public offering, initially targeting a $1.77 trillion valuation to fund a $75 billion capital raise. The company’s market capitalization has since risen to approximately $2.5 trillion, with total IPO proceeds reaching roughly $86 billion.

Demand for the offering vastly exceeded supply. By June 5, underwriters had received orders for twice the authorized share allotment, and actual demand on the June 12 IPO date may have been four times higher than available shares.

Part of this frenzy stemmed from intense investor appetite for SpaceX stock, which ranked among the hottest IPOs in history. However, the extreme oversubscription was also driven by the extremely limited float: less than 5% of shares were made available for public trading, with early investors, employees, and founder Elon Musk retaining control of the remainder.

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That dynamic is poised to shift significantly. By October 31—just in time for Halloween—the number of publicly traded shares could surge due to a major unlocking catalyst.

Staggered Lockup Expirations to Reshape Float

Most IPOs impose 180-day lockup periods on major shareholders to prevent immediate sell-offs that could pressure the stock price. SpaceX employs a more nuanced, staggered schedule with releases tied to specific timelines and milestones.

According to Business Insider, tranches of shares unlock at 70-day and 90-day intervals, with larger blocks becoming available following the release of second-quarter and third-quarter earnings. The most significant unlock is slated for June 2027, when Elon Musk becomes eligible to sell his 42% stake.

Well before that milestone, however, the public float is projected to double by the end of August 2026, with one-third of all shares unlocked by the end of October. This represents a massive increase from today’s sub-5% float. The true test for the stock will arrive as these restrictions lapse and the tradable supply expands.

While the expanded float could pressure shares, countervailing catalysts may provide support. Notably, SpaceX qualified for Nasdaq’s fast-entry rule, mandating inclusion in the index after just 15 days of trading. This will compel index-tracking funds to purchase shares while the float remains relatively constrained.

Ultimately, the company’s long-term stock performance will hinge on fundamental business execution. However, historical precedent shows that lockup expirations following major IPOs can introduce significant volatility. With the current public float below 5%, the market dynamics could shift considerably once this figure balloons.

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