On September 23, SpaceX declined 3.12% in regular trading, dropping to $149.83/share with turnover of $4.887 billion. The selloff was triggered by a confluence of insider selling and imminent share unlock pressure.

SpaceX President and COO Gwynne Shotwell filed a Form 144 to sell 342,170 shares of common stock through Morgan Stanley, valued at approximately $51.96 million. The shares were acquired via cash exercise of stock options. This marks the first insider reduction since SpaceX went public. Shotwell had adopted a 10b5-1 trading plan in late June covering up to 585,605 shares, and the current sale falls within that plan's disclosed ceiling. Meanwhile, investment firm Powerlaw is also reportedly considering a strategic disposal of SpaceX holdings to fund distributions and new investments.

Adding to selling pressure, approximately 328 million shares are set to unlock on September 24, with additional tranches scheduled through October. The overlap of executive selling signals, institutional disposal intent, and a looming supply wave weighed heavily on sentiment, overshadowing recent positive catalysts including the Nasdaq 100 rebalancing that doubled SpaceX's index weight to 2.82% and a $946 million NASA contract modification.

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