Castelion Raises $1 Billion Series C to Scale Production of Low-Cost Hypersonic Weapons
Rhea-AI Summary
Castelion, a defense technology company focused on hypersonic weapons, announced a $1 billion Series C financing on August 19, 2026. The round combines $800 million in equity with $250 million in committed revolving credit, and values Castelion at $13 billion. The equity was co-led by JPMorganChase's Strategic Investment Group, Andreessen Horowitz, and funds managed by Carlyle (NASDAQ: CG), with participation from Lightspeed, Lavrock, Altimeter, General Catalyst, Interlagos, and an account advised by T. Rowe Price Associates. Castelion plans to use the capital to scale production of its Blackbeard hypersonic strike missile at its 1,000-acre Project Ranger campus in New Mexico, accelerate a longer-range strike system, and develop defensive systems. The company has secured over $500 million in U.S. military contracts in 18 months and targets Blackbeard fielding in 2027.
Positive
- $1 billion Series C financing combining equity and committed credit
- $800 million equity round co-led by JPMorganChase, Andreessen Horowitz, Carlyle
- Implied company valuation of $13 billion post-Series C
- More than $500 million in U.S. military contracts in 18 months
- Prior $250 million private infrastructure spend at 1,000-acre Project Ranger campus
- Blackbeard advanced from clean sheet to program of record in under four years
Negative
- None.
Key Figures
Historical Context
| Date | Event | Sentiment | 24h Move | Catalyst |
|---|---|---|---|---|
| Aug 06 | Strategic partnership | Positive | -2.2% | Carlyle agreed to provide hybrid capital and take a minority ownership interest. |
| Aug 06 | 2Q26 earnings | Negative | -2.2% | Net asset value per share declined 1.8% despite quarterly income and dividend declaration. |
| Jul 29 | Series D financing | Positive | -3.8% | CAIS raised $170 million at a valuation exceeding $2 billion. |
| Jul 29 | Minority investment | Positive | -3.8% | Bixby Wealth Solutions made an undisclosed strategic minority investment in FLP. |
| Jul 27 | Defense acquisition | Positive | +1.9% | Carlyle acquired Secturion Systems through its aerospace, defense, and government platform. |
24h Move is the share-price change in the day after each event; other market factors may also have contributed.
The selected history showed negative reactions to three positive strategic announcements, while two events with negative or mixed elements aligned negatively.
Key Terms
revolving credit facility financial
hypersonic strike missile technical
program of record regulatory
AI-generated analysis. How Rhea-AI works. Not financial advice.
Funding drives Blackbeard to maximum production rate and accelerates a new longer-range strike system
The Series C round is a combination of
Castelion has secured more than
"Deterrence depends on unapologetic American strength; highly capable weapon systems that adversaries fear produced in quantities they can't imagine at a price taxpayers can afford," said Bryon Hargis, Co-Founder and CEO of Castelion. "There's a manufacturing renaissance underway and this round turbocharges American production of Blackbeard. Designed in
"Castelion is helping to address a critical national security challenge by bringing greater speed, agility and manufacturing capacity to the development of next-generation defense technologies," said Todd Combs, Head of the Strategic Investment Group for JPMorganChase's Security and Resiliency Initiative. "Through the Strategic Investment Group, part of the firm's Security and Resiliency Initiative, JPMorganChase is proud to support companies that are strengthening the defense industrial base, delivering more affordable and scalable solutions to today's pressing challenges, and advancing the innovation that underpins long-term national and economic security."
"We backed Castelion when it was a small team that wanted to build what the department of War most needed faster and cheaper than the experts thought possible," said Katherine Boyle, General Partner, Andreessen Horowitz.
"Four years later there is a factory in
"We view Castelion as a critical asset to national security, advancing next-gen technology that strengthens America's defense industrial base," said Aaron Hurwitz, Managing Director on Carlyle's Aerospace, Defense & Government team. "We're excited to partner with the team as they accelerate development and expand capacity."
Since its founding, Castelion has moved from early development to repeated flight testing, operational integration, and construction of a dedicated high-rate production capability. This new capital will allow Castelion to move faster across three priorities:
- Increasing Blackbeard Production Capacity. Castelion will heavily expand manufacturing capacity at and beyond the company's Project Ranger site in
Sandoval County, New Mexico . The 1,000-acre Project Ranger Campus is the largest dedicated hypersonic missile manufacturing facility in the nation. Castelion previously committed more than$250 million in private infrastructure spend at the site and will now commit hundreds of millions more to expand manufacturing capacity of Blackbeard.
- Developing a Longer-Range Strike System. Castelion is accelerating development and test of a much longer-range precision strike weapon which has been in development at Castelion for several years. This weapon leverages core technologies, components, and manufacturing techniques from the Blackbeard weapon. The goal is to complement large, exquisite systems with a dramatically lower-cost alternative that can be produced at much higher rates - making long-range hypersonic strike a capability that can be fielded in meaningful quantities.
- Developing Defensive Systems. Castelion is developing defensive systems that builds on the technologies, manufacturing methods, and rapid iteration model developed for Blackbeard. This effort will be focused on bringing lower-cost, higher production rates, and greater magazine depth to increasingly important air and missile defense missions.
"Lightspeed led Castelion's Series A before a complete system had flown," said Ravi Mhatre, Co-Founder of Lightspeed Venture Partners. "Three rounds later the company is mixing its own propellant in
"We backed Castelion at pre-seed, when this was still just an idea, and the production demand it's generating today is the clearest signal we've ever seen," said Alex Poulin, Partner at Lavrock Ventures. "In under four years, Castelion has gone from clean sheet to program of record, one of the fastest ramps in the sector. Lavrock is proud to keep backing the team as they scale Blackbeard and bring new systems online."
"Castelion has earned extraordinary trust and credibility by demonstrating technology that creates an asymmetric advantage and can be built at speed, cost, and scale," said Erik Kriessmann, Partner at Altimeter. "They've turned ambitious promises into flight-tested hardware and real production capacity for critical national security priorities. The opportunity ahead is enormous, and we believe Castelion is building one of the most important defense companies of this generation."
"Bryon, Sean and Andrew have built Castelion on strong fundamentals," said Emma Norchet of T. Rowe Price Associates, Inc. "The company has contracts in hand, a manufacturing campus built with its own capital, and unit economics that improve with scale — truly unique characteristics for a company before it reaches the public markets. We are thrilled to be participating in this round."
"We believe credible deterrence will be won by companies that manufacture at the speed of the threat, build on frontier technology, and attract exceptional talent," said Alexa Liautaud, Partner at General Catalyst. "Castelion exemplifies that rigor, and we are proud to deepen our partnership as the team works to close a critical hypersonic gap."
"Castelion is at the forefront of defense manufacturing in the nation," said Tom Ochinero, Chairman and Founding Partner of Interlagos Capital. "They're building the capabilities to produce thousands of hypersonic weapons a year, something the
About Castelion:
Castelion builds American hypersonic deterrence through rapid, affordable, and scalable production of advanced strike weapons. Blackbeard is the first American hypersonic missile engineered from inception for industrial-rate output, commercial unit cost, and continuous flight test iteration. The company is headquartered in
*An account advised by T. Rowe Price Associates, Inc.
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SOURCE Castelion