Hermeus Raises $350M Series C Led by Khosla Ventures to Build…

Team S · 2026-04-07T14:17:59.000Z

US-based aerospace startup Hermeus has raised $350 million in a Series C funding round, led by Khosla Ventures, as it accelerates the development of hypersonic aircraft for defense and commercial applications. The funding round included participation from more than a dozen investors, marking a major milestone for the company as it reached a $1 billion valuation, entering unicorn status in the defense-tech and aerospace sector. Founded in 2018, Hermeus is building high-Mach aircraft capable of flying at speeds exceeding Mach 5, aiming to drastically reduce travel time while also supporting national security missions. The company’s flagship programs, including the Quarterhorse aircraft, are designed to rapidly iterate and test hypersonic technologies. Hermeus follows a unique development approach that emphasizes rapid prototyping and frequent flight testing, enabling faster progress compared to traditional aerospace programs. The company has already achieved multiple successful flight milestones, demonstrating strong technical momentum. With the newly raised capital, Hermeus plans to accelerate the production of high-speed unmanned aircraft, expand engineering capabilities, and scale its testing infrastructure, particularly for defense applications aligned with U.S. national security priorities. The funding highlights growing investor interest in defense tech and hypersonic innovation, as global competition intensifies around next-generation aerospace capabilities and ultra-fast transportation systems.

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Hermeus Raises $350M Series C Led by Khosla Ventures to Build… | Newnex