Northrop Grumman is trading at $483.91, down 4.14%, with no clear company-specific catalyst identified for the after-hours decline.
- On September 29, Northrop Grumman announced a $18.8 million U.S. Army propulsion contract, a positive development that does not explain the drop.
- Broader indices were mixed, with no reported move exceeding 0.5%; available evidence does not establish a market-wide cause.
- No after-hours volume data was provided.