Castelion raised $350 million in Series B funding from Altimeter Capital, Lightspeed Venture Partners and other investors.

With $350 million in new funding, Castelion is among the companies racing to make the U.S. competitive with Russia and China ...

Hypersonic weapons are in the spotlight. Here’s how they work, why they matter, and what current programs in Russia, China, ...

The Series B raise follows a steady funding climb. In January 2025, Castelion reported a $100 million infusion that included ...

Lockheed Martin has opened its $17 million, 17,000-square-foot Hypersonics System Integration Lab on its Huntsville campus.

The Dark Eagle Long-Range Hypersonic Weapon is the U.S. Army’s bid to break into the hypersonic strike game with a mobile, ...

"Castelion is transforming the economics of our defense industrial base," said Paul Kwan, Managing Director, General Catalyst ...

YKJ-1000 hypersonic missile with a range of 1,300km, speed of Mach 7, impossible to intercept - the 'nightmare' of US-Japan ...

Hypersonic missile startup Castelion raised $350 million in a Series B financing round, increasing the Torrance, California-based company’s overall capital war chest to $464.5 million since emerging ...

Space Transportation released what it said was launch and strike footage of its new YKJ-1000, which it later showed attacking ...

After years of research and development by the U.S. Navy, hypersonic missiles are now being tested for deployment on ...

BARCELONA (AP) — Iran is boasting that it has hypersonic missiles and says it already has begun firing the cutting-edge weapons at Israel. There is no evidence that Iran has unleashed the missiles, ...