Sierra Space Raises $550M Series C Round

Caption: Sierra Space’s valuation has jumped to $8 billion following a $550 million Series C funding round, the company announced March 5, 2026. Credit: Sierra Space

Sierra Space’s valuation has jumped to $8 billion following a $550 million Series C funding round, the company announced on March 5.

Credit: Sierra Space
Sierra Space has closed a $550 million Series C funding round as it zeroes in on the national security space sector, the company announced March 5. The new round was led by LuminArx Capital Management and brings the company’s valuation up to $8 billion, Sierra Space says. Other investors include...
Vivienne Machi

Vivienne Machi is the military space editor for Aviation Week based in Los Angeles.

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