SpaceX's public float has grown from roughly 3-5% to about 16% of shares outstanding as insider lockups expire, and the Nasdaq 100's upcoming quarterly rebalance will lift the company's index weighting well beyond the sub-1% cap it held since joining in July. Passive funds tracking the index, including the Invesco QQQ ETF, should see another wave of mandatory buying to match the new weighting.
SpaceX joined the Nasdaq 100 on July 7, just 15 trading days after its June 12 IPO, when shares priced at $135 and the company was valued at $1.75 to $1.8 trillion. A precedent set in May 2026 let sufficiently large IPOs skip the usual multi-month seasoning period, and SpaceX used that path to get in fast.
But the fast entry came with a cap. Nasdaq applies a 3x multiplier to companies whose public float sits below 33.3% of shares outstanding, and SpaceX's float of just 3-5% at inclusion held its effective index weight under 1%. That constraint is now easing.
Lockup expirations are unlocking supply
Insider lockups are expiring on a staggered schedule through December 2026, freeing more SpaceX shares for public trading each month. By early September, the free float had grown to roughly 16% of total shares outstanding, well above the level that triggered the 3x multiplier rule.
As a result, the Nasdaq 100's upcoming quarterly rebalance will push SpaceX's index weighting significantly higher. Every fund tracking the index has to adjust its holdings to match, and that includes the Invesco QQQ ETF.
Billions in forced buying
SpaceX's initial inclusion in July already forced an estimated $4.3 billion in passive inflows from QQQ alone, and the September rebalance should trigger another wave of mandatory buying as managers realign portfolios to the new weighting. Fund managers have only a narrow window to execute these trades once the new weights take effect, which can concentrate buying pressure into a handful of sessions.
More rebalances likely ahead
The float expansion is not a one-time event. With insider lockups scheduled to keep expiring through December 2026, SpaceX's index weight will likely keep rising at each subsequent quarterly rebalance. The December rebalance could bring another weight increase and another round of forced buying, depending on how much additional float reaches the market between now and then.
Source: Crypto Briefing
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