Hypersonic missile startup Castelion secures $1 billion to mass-produce Blackbeard rockets

Castelion, a U.S. defense-tech startup focused on mass-producing affordable hypersonic weapons, has raised over $1 billion in new financing. The company will use the funds to expand missile production and develop a broader portfolio of offensive and defensive systems.

The Series C funding round, announced on August 19, consists of $800 million in equity and a $250 million committed revolving credit facility. The equity round was co-led by JPMorganChase's Strategic Investment Group, Andreessen Horowitz, and funds managed by Carlyle. Other participants included Lightspeed Venture Partners, Lavrock Ventures, Altimeter, General Catalyst, and Interlagos, alongside new investor T. Rowe Price Associates. According to Castelion, the financing values the four-year-old startup at $13 billion.

The capital will be used to expand production of Blackbeard, Castelion's hypersonic strike missile, at its manufacturing complex in Sandoval County, New Mexico. At the same time, the company will accelerate work on a longer-range precision strike weapon and defensive systems for air and missile defense.

Castelion and its investors are betting on the Pentagon's push to produce missiles and other munitions faster and in much larger quantities. Recent conflicts have exposed strains in U.S. weapons stockpiles and manufacturing capacity, prompting the Defense Department to seek new suppliers in a market long dominated by traditional defense contractors like Lockheed Martin and Raytheon.

"There's a manufacturing renaissance underway, and this round turbocharges American production of Blackbeard," said Bryon Hargis, Castelion's co-founder and chief executive, in a statement. The company, founded in 2020, has already secured a $975 million contract from the U.S. Space Force and is positioning itself to become a key supplier for the Pentagon's hypersonic weapons programs.

Castelion's approach differs from established contractors by emphasizing rapid prototyping and modular design to reduce costs and production timelines. The company claims its Blackbeard missile can be manufactured at a fraction of the cost of competing systems, addressing the military's need for large quantities of expendable hypersonic weapons. The startup also plans to develop defensive systems capable of intercepting incoming hypersonic threats, a growing priority for the U.S. military as adversaries like China and Russia advance their own hypersonic programs.