SpaceX (SPCX) is not replacing a specific company in the Nasdaq-100; it is being added to the index as a new constituent, with index funds likely adjusting by buying SpaceX rather than swapping out one clearly named stock from the public announcement.

What that means

When a new company enters the Nasdaq-100, the index provider typically rebalances the index so the newcomer is included without needing a one-for-one “replacement” headline. In this case, the available reporting says SpaceX joins the Nasdaq-100 on July 7, 2026, and the change will affect passive funds tracking the index.

Why people ask this

The question usually comes from how index rebalancing works: if a new stock is added, something else may be removed to keep the index’s rules and membership count consistent. But the public sources here do not identify a single named company that SpaceX is directly replacing.

Practical takeaway

  • SPCX is being added, not announced as a direct swap for one specific stock.
  • Passive funds tracking the Nasdaq-100 will need to buy it.
  • Its initial index weight is expected to be relatively small, around 1%.

TL;DR: SpaceX is joining the Nasdaq-100, and the available reports do not show a publicly stated “replacement” for one exact company.