Sidus Space Inc is trading 8.1% down at $4.04 as initial excitement surrounding its upcoming inclusion in the Russell 3000, Russell 2000, and Russell Microcap indexes begins to dissipate.
- The stock reached a pre-market high of $4.64 (up 5.69%) earlier today, June 12, 2026, following the index rebalancing announcement.
- Early gains are being unwound during the regular trading session as the index-driven momentum cools and the stock reverses its initial spike.