China and Russia have hypersonic missiles. This $13 billion startup wants the U.S. to catch up

From Fortune 3 Nov 2026, 10:56 UTC 1 min read

In 2022, Bryon Hargis, Andrew Kreitz, and Sean Pitt—all previously SpaceX executives—cofounded Castelion to help close America’s hypersonics gap. The company’s now valued at $13 billion.

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China and Russia have hypersonic missiles. This $13 billion startup wants the U.S. to catch up

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