Lockheed Martin
Lockheed Martin is an undisputed big dog of the space stocks, they have a massive aerospace business and a space technology division.
GomSpace
GOMSpace is a manufacturer and supplier of nanosatellites for academic, government, and commercial markets. Services include systems integrations, nanosatellite platforms, and miniaturised radio technology.
AirBus
Airbus, a European aerospace company with a large space division. Their share price is steady, and they pay a dividend.