Momentus is trading 6.2% up at $4.44, with the move appearing aligned with broader risk-on trading and no verified company-specific announcement identified for September 21, 2026.
- The S&P 500 is up 0.76% and Nasdaq Composite 1.23%.
- Reuters reports rising futures, stronger AI stocks, falling oil prices, and lower Treasury yields supporting equities.
- The latest identifiable company-related item was a September 15 product announcement, not a new September 21 catalyst.