Castelion (Series B)
Funding Details
Awarder
RSS - techcrunch.com
Date Award
July 6, 2025
Vertical
Defense
Funding Amount
$350,000,000
Company Info
Founding Year
2023
Traction
Castelion has won grants and awards from various DoD offices and has tested its hypersonic vehicle in the Mojave Desert.
Organizations Involved
U.S. Department of Defense, Air Force Research Laboratory, Naval Air Systems Command
Founders
Former SpaceX executives
Market
Government Defense
Location
United States
Coinvestors
Lightspeed Venture Partners, Altimeter Capital
Company Description

Castelion is a hypersonic weapons startup founded by former SpaceX executives, aiming to transform the production of hypersonic missile systems, a critical national security technology.

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