Imagine buying a house in a neighborhood where 143% more houses are suddenly listed for sale overnight. That’s roughly the situation facing SpaceX shareholders this Thursday, when 911.5 million shares worth an estimated $101B to $123B become tradable for the first time.

It’s the largest single-day stock unlock in US public listing history. And it’s landing at a moment when the company’s shares are already under pressure following a pre-market slide of up to 11% after its first-ever earnings report.

What’s actually happening

SpaceX went public on June 12, 2026, pricing shares at $135 each. The IPO was structured conservatively, with only 5% of total shares floated initially.

The company released its first quarterly earnings on August 4, which triggered the first phase of a staggered lock-up expiration. Starting August 6, employees, early investors, and venture capitalists can sell 20% of their eligible shares into the open market.

Those 911.5 million shares represent roughly a 143% increase in the tradable float — the number of shares available for trading on public exchanges is about to more than double in a single day.

The earnings backdrop makes it worse

SpaceX’s Q2 earnings report on August 4 did beat revenue expectations. But investors zeroed in on two uncomfortable details: high capital expenditures and free cash flow pressures. The stock dropped as much as 11% in pre-market trading on August 5, the day after the report.

SpaceX also disclosed a $540 million unrealized loss on its cryptocurrency holdings during Q2. The company reported making no Bitcoin sales during the quarter, meaning it’s sitting on those losses.

The lock-up architecture is unusual

The initial float of just 5% of shares was unusually small. Thursday’s release is the first of multiple scheduled tranches, with additional shares becoming tradable in subsequent months.

One tranche that won’t be hitting the market: a contingent release tied to the stock maintaining a price above $175.50. Since SpaceX shares haven’t held that level, those additional shares remain locked.

Elon Musk’s own substantial holdings remain locked until mid-2027.

What this means for investors

The sheer scale here — more than $100B in newly tradable shares — makes this a genuinely unprecedented test case. Pre-positioning by traders ahead of Thursday’s event has already been significant.

SpaceX’s $540 million unrealized Bitcoin loss represents a material exposure to an asset class that remains volatile and increasingly scrutinized by institutional investors.

With additional share tranches scheduled for release and Musk’s holdings unlocking in mid-2027, Thursday is the opening act of a much longer liquidity story.