Castellum is trading 5.08% up in pre-market at $0.64, with no clear catalyst identified. - This compares with the September 28 close of $0.61; the supplied price context shows a modestly fluctuating week before Monday’s 2.99% decline. - Search results show no fresh company announcement dated September 29. - The latest surfaced Castellum-specific news was its August 31 NAVAIR contract modification; the supplied market backdrop is mixed and does not clearly explain the gain.