SPCX is set to join the Nasdaq-100 on July 7, 2026 , with the index change effective before the market opens that day. Nasdaq’s announcement and multiple market reports agree on that timing.

Quick Scoop

  • Announcement date: June 26, 2026.
  • Index inclusion date: July 7, 2026, before the market opens.
  • Related fund buying: index-tracking funds are expected to rebalance after the market close on July 6.

Context

This is being described as one of the fastest additions ever to the Nasdaq-100, made possible by newer inclusion rules for large IPOs.

TL;DR

SPCX enters the Nasdaq-100 before trading starts on July 7, 2026.