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Industrial/Manufacturing
Security
Space/Defense

Castelion

Affordable hypersonic military systems

CORE INFO

$350M
Total Funding
Series B
Round
2022
Founded
Torrance, California, United States
Headquarters

Castelion is a defense technology company that specializes in the rapid design and production of affordable hypersonic weapons, primarily serving the U.S. military. Their innovative approach leverages non-aerospace components to reduce costs and enhance production efficiency.

  • The U.S. Navy has placed a $23.4 million order for 50 Blackbeard missiles and containers.techradar.com
  • Castelion raised $350 million in a Series B funding round led by Altimeter Capital and Lightspeed Venture Partners.latimes.com
  • TechRadar reported that Castelion's cost-effective manufacturing techniques allow them to offer hypersonic missiles at prices comparable to luxury vehicles.techradar.com

WHY WE WOULD WORK AT CASTELION

Innovative Technology

Join a team pioneering affordable hypersonic weapons like the Blackbeard missile, designed for rapid production using advanced components from non-aerospace industries.

Mission-Driven Culture

Contribute to a mission that enhances national security and restores America's military innovation, ensuring the safety of the free world.

Competitive Compensation

Benefit from a funding-backed environment with $350M raised in Series B, allowing for competitive salaries and growth opportunities.

Rapid Growth Potential

Be part of a fast-growing company that has secured contracts with the U.S. Navy and aims to deliver 500 missiles annually by 2026.

Impactful Work

Play a crucial role in developing next-generation military systems that significantly enhance the U.S. conventional deterrence capabilities.

Collaborative Environment

Work alongside a talented team of innovators and leaders committed to out-innovating and out-producing rivals in the defense sector.

MARKET AND TRACTION

GROWTH TACTICS

  • Castelion focuses on integrating components from non-aerospace industries to reduce production costs and lead times.

  • The company aims to scale production rapidly, with plans to deliver 500 missiles annually starting in May 2026.

  • By offering hypersonic missiles at prices comparable to luxury vehicles, Castelion targets a broader market within the defense sector.
  • NOTABLE CUSTOMERS

  • The U.S. Navy has placed a significant order for 50 Blackbeard missiles and containers, valued at $23.4 million.

  • Castelion has secured contracts with the U.S. Army and U.S. Air Force for the integration and testing of their hypersonic weapons.
  • KEY METRICS

    ✦ KEY METRIC
  • Total funding raised to date is $350 million, with the most recent Series B round completed in December 2025.

  • Castelion has completed over 24 flight tests, demonstrating the viability of their hypersonic technology.

  • The company has signed a multi-year production agreement to deliver 500 missiles annually starting in 2026.
  • COMPETITIVE ADVANTAGE

  • Castelion's innovative use of automotive-grade electronics and oil & gas tubing allows for significant cost reductions in missile production.

  • The company's ability to manufacture hypersonic weapons at a lower price point enhances the United States' conventional deterrence capabilities.
  • MARKET POSITION

  • Castelion positions itself as a leader in affordable hypersonic military systems, aiming to restore America's competitive edge in defense technology.

  • By focusing on rapid design and mass production, Castelion seeks to meet the growing demand for advanced military capabilities in the defense sector.
  • PRODUCT AND TECH

    Blackbeard Missile

    The Blackbeard missile is Castelion's flagship product, capable of reaching Mach 5 speeds. Designed for cost-effective mass production, it enhances the U.S. military's hypersonic capabilities while maintaining affordability.

    Rapid Design and Testing

    Castelion specializes in the rapid design and testing of military systems, allowing for quick iterations and improvements. This approach ensures that new technologies can be deployed swiftly to meet evolving defense needs.

    Cost-Effective Manufacturing

    By utilizing components from non-aerospace industries, such as automotive-grade electronics and oil & gas tubing, Castelion significantly reduces production costs and lead times. This innovative manufacturing strategy enables the delivery of hypersonic weapons at competitive prices.

    Military Integration Services

    Castelion provides integration and testing services for hypersonic weapons, collaborating with branches of the U.S. military, including the Navy, Army, and Air Force. These services ensure that their systems meet operational requirements and enhance national defense.

    Innovative Component Sourcing

    The company leverages advanced components from non-traditional sectors, such as automotive and oil & gas, to enhance performance and reduce costs. This innovative sourcing strategy allows Castelion to outpace competitors in the hypersonic weapons market.

    COMPANY CULTURE

    Values

  • Commitment to innovation and rapid development

  • Focus on affordability and cost-effectiveness

  • Dedication to national security and defense

  • Emphasis on collaboration across diverse industries

  • Integrity and transparency in operations
  • Operating Principles

  • Leverage non-traditional components for efficiency

  • Prioritize speed in design and manufacturing processes

  • Foster a culture of continuous improvement and learning

  • Encourage cross-functional teamwork and communication

  • Maintain a customer-centric approach in all initiatives
  • Benefits

  • Competitive compensation packages

  • Opportunities for professional development and training

  • Flexible work arrangements to promote work-life balance

  • Engaging work environment that values employee input

  • Access to cutting-edge technology and resources
  • Team Cadence

  • Regular team meetings to align on goals and progress

  • Agile project management practices to adapt quickly

  • Frequent feedback loops to enhance collaboration

  • Celebrations of milestones and achievements
  • Learning & Growth

  • Commitment to ongoing education and skill enhancement

  • Support for attending industry conferences and workshops

  • Mentorship programs to foster career development

  • Encouragement of innovative thinking and experimentation
  • HIRING SIGNAL

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    KEY COMPANY ANNOUNCEMENTS

    Filter
    12 announcements · ranked by importance
    Sep 1, 2026CUSTOMER WINCastelion Moves Blackbeard into Production with U.S. Navy Order Valued Up to $200 Millioncastelion.com
    Aug 19, 2026FUNDINGCastelion Raises $1B Series C to Scale Production of Low-Cost Hypersonic Weaponscastelion.com
    Aug 1, 2026CUSTOMER WINU.S. Navy Awards Castelion $90M to Advance Blackbeard to Early Operational Capabilitycastelion.com
    Jun 1, 2026CUSTOMER WINU.S. Navy Awards Castelion First Delivery Order for Blackbeard Hypersonic Weaponcastelion.com
    Dec 1, 2025FUNDINGCastelion Closes $350 Million Series B to Mass Produce U.S. Hypersonic Weapons - Castelioncastelion.com
    Jan 1, 2025FUNDINGCastelion Announces Series A Funding - Castelioncastelion.com
    Dec 5, 2025FOUNDER PROFILEThe Military Desperately Needs More Missiles. Startup Castelion Wants to Fix That.forbes.com
    Oct 5, 2023PRESSa16z-backed Castelion wants to mass-produce defense hardware, starting with hypersonics | TechCrunchtechcrunch.com
    Jun 2, 2026ESSAYWhat America Is Missing Between Sanctions and Nuclear Wargeneralist.com
    Jul 8, 2026INTERVIEWIn Conversation with Castelion's Bryon Hargis: From SpaceX to Building America's Hypersonic Arsenalyoutube.com
    Jun 11, 2026CUSTOMER WINSaronic and Castelion to Demonstrate First-of-Its-Kind Maritime Hypersonic Launch Capabilitycastelion.com
    Feb 25, 2026MILESTONEFrom San Nicolas With Loveyoutube.com