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SpaceX Floats More Shares as Nasdaq-100 Weight Is Set to More Than Double

The float expansion and a pro forma Nasdaq-100 rebalance could force billions of dollars of passive buying that will collide with further scheduled insider lockup releases.

Overview

  • SpaceX went public in June 2026, listing on June 12 and opening at $150 after an IPO price of $135, which left it among the largest U.S. companies by market value.
  • Insider lockup expirations have pushed the publicly tradable float from about 3–5% at listing to roughly 16% by early September, with more staged releases scheduled through December 2026.
  • Pro forma data from Nasdaq’s Global Index Watch projects SpaceX’s Nasdaq-100 weight to rise from about 1.28% to roughly 2.82%, a change that requires index-tracking ETFs to buy large blocks of SPCX during the quarterly rebalance window.
  • SpaceX reported strong operational results in Q2—roughly $7.8 billion in revenue, about 92% year-over-year growth, and Starlink subscribers near 12 million—while the company is signing AI-compute deals and seeking FCC approval for orbital data centers.
  • Valuation and timing risks remain: SPCX trades at very high sales multiples, which raises downside risk if growth disappoints, and the interplay of added supply from future lockups and concentrated index-driven demand creates volatile, timing-dependent price pressure.