Sierra Space raises $550 million in Series C funding Astrobitica March 5, 2026 (Last updated: March 5, 2026) 1 minute read Investment comes as company shifts toward national security programs The post Sierra Space raises $550 million in Series C funding appeared first on SpaceNews. About the Author Astrobitica Administrator Visit Website View All Posts Post navigation Previous: Vast raises $500 million for commercial space station developmentNext: Self-repairing spacecraft could change future missions