SpaceX Has a Hidden 30% Rule—and It Could Surprise Investors

Ahead of Space Exploration Technologies Corp‘s (NASDAQ:SPCX) expected Aug. 3 earnings report, investors may want to watch more than revenue and margins. They may also want to watch $175.50.

If SpaceX shares close above that level— 30% above the company’s $135 IPO price—on five of the 10 trading days leading up to earnings, an overlooked provision in the company’s IPO lock-up agreement will kick in, unlocking 456 million additional shares just two days after the first scheduled insider share release.

It’s a little-known clause that could quietly make SpaceX’s first major lock-up expiration significantly larger than many investors expect.

The Hidden 30% Rule

Most investors are already watching Aug. 5, when approximately 912 million shares, representing about 20% of eligible non-affiliate holdings, become eligible for sale on the second trading day after SpaceX reports second-quarter results.

But that’s only the first wave.

The IPO prospectus includes a performance-based provision allowing another 456 million shares—or an additional 10% of eligible holdings—to be released on Aug. 7 if the stock closes at least 30% above its IPO price on five of the 10 trading days preceding the first earnings release.

In other words, strong stock performance—not weak performance—could accelerate the amount of stock eligible to enter the market.

Why It Matters

Lock-up expirations don’t automatically result in insider selling. Employees, executives and early investors can choose to continue holding their shares, particularly if they remain confident in the company’s long-term prospects.

But traders closely monitor lock-up events because they increase the supply of shares that can be sold, sometimes creating additional volatility around earnings or other major catalysts.

The conditional Aug. 7 release makes SpaceX’s lock-up schedule particularly unusual. Rather than tying insider liquidity to the passage of time alone, the company linked part of the release to the stock’s own performance—a mechanism that rewards strength by allowing more shares to become eligible for trading sooner.

Beyond August, SpaceX’s lock-up schedule remains staggered through the rest of 2026 and into 2027, including a 1.3 billion-share release following third-quarter earnings. Elon Musk‘s 6.4 billion shares remain subject to a separate one-year lock-up that is not eligible for early release.

What Investors Should Watch

SpaceX’s first earnings report is already shaping up to be one of the company’s biggest post-IPO events. But the results may not be the only catalyst.

If the stock can hold above roughly $175.50 often enough before earnings, investors could see more than 1.3 billion shares become eligible for sale within just two trading days—912 million on Aug. 5 and another 456 million on Aug. 7. That doesn’t guarantee a wave of insider selling, but it does make one little-known IPO clause worth watching just as closely as the earnings report itself.

Image via Shutterstock