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In the face of grave threats, a special group of American men and women have always stood up to meet the challenge. Today, and every day, we thank them for their courage and commitment. Happy Veteran's Day from all of us at Castelion

Last week at Castelion, the team conducted three static fires in less than 24 hours, flew two test flights, and launched the company's new flight computer and control actuation system. To beat China, you need to learn faster than they do. That's what Castelion does.

One last static fire to cap off a busy year at our solid rocket motor production and test facility in Midland, TX. One of seven tests conducted over the past 30 days.

Affordable, mass produced, long-range hypersonic weapons are essential to deterring future conflicts. Today, Castelion is one step closer to addressing this critical national need with the announcement of a $100M financing round with Lightspeed, a16z, and Lavrock Ventures

LFG Castelion economist.com/business/2025/…

Another flight test in the books – this time Spaceport America. Our second flight in the past 30 days. The best way to stay ahead of your adversary in a prolonged competition is to have faster learning cycles than they do.

Congratulations on a successful test Castelion 🫡 x.com/CastelionCorp/…

Hey everyone. Join the "noti" gang. Visit us on the live stream on YouTube and hit the bell so you get notifications when we go live. youtube.com/live/b8qt7SHOM…

🛠️ The New Arms Race: China vs. the US @jason sits down with Bryon Hargis Bryon Hargis , CEO of Castelion, to break down how the U.S. can compete with China's high-volume, low-cost manufacturing of military tech—and why the answer isn’t price, but speed and automation. 🔹 The

Last week, our CEO Bryon Hargis sat down with Jason Calacanis, host of This Week in Startups to discuss Castelion's approach to developing affordable hypersonic weapon systems and the future of defense manufacturing.

from Cal Biesecker: Castelion Chalks Up Another Flight Test Of Hypersonic Missile - Defense Daily defensedaily.com/castelion-chal…

This weekend, AFWERX announced Castelion's selection for the STRATFI program, which seeks to advance innovations beyond prototyping to full-scale implementation. We look forward to working with the Air Force to accelerate the transition of our capabilities to the warfighter.

2x static fires and a controlled flight in 72 hours last week. Our 7th launch since late November. Learn faster than your adversary.

"Our intention is to give the US and its allies the best possible capabilities" - Bryon Hargis, Castelion CEO, spoke with The Guardian about Castelion's mission to give our nation new tools to deter future conflicts. Read more here: theguardian.com/world/2025/mar…

This week, Castelion is one step closer to delivering mass-produced long-range strike weapons after moving into two new production and dev facilities in LA and Dallas. These sites represent more than 100 thousand square feet of new space dedicated to preventing future wars.

Welcome to the new factory, Gertrude!

Another One. April 13, 2025

At Castelion, we lovingly refer to our rapid prototype and test group as “Desert Rats”. Every other week, our Desert Rats appear under the desert sun to fly iteratively upgraded components and subsystems, continuing a legacy of prototyping and test in America’s deserts.

Welcome to the family, Edith. Our third mobile launch vehicle means we can now run multiple flight test campaigns in parallel. That means faster iteration, more real-world data, and more chances to break things (and fix them). Edith helps us move faster. Want in?

May 18, 2025