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Portal Space Systems Secures $50 Million for Military Propulsion

4/10/2026

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Summary

Story summary

Portal Space Systems, founded by Jeff Thornburg, has raised $50 million in Series A funding to advance its solar thermal propulsion to meet military demands.
The company aims to develop maneuverable vehicles, including Starburst and Supernova, and plans a production facility in Bothell, Washington.
The company launched its Mini Nova payload and plans to launch its first Starburst spacecraft later this year.

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Story summary

Portal Space Systems, founded by Jeff Thornburg, has raised $50 million in Series A funding to advance its solar thermal propulsion to meet military demands.
The company aims to develop maneuverable vehicles, including Starburst and Supernova, and plans a production facility in Bothell, Washington.
The company launched its Mini Nova payload and plans to launch its first Starburst spacecraft later this year.