Hermeus Timeline

Events

• 2026-09-15 - Partnership - Hermeus gains licence to manufacture F100-PW-229 engines - Hermeus will use its rapid-build production model while meeting Pratt & Whitney quality, safety and site-activation standards. The F100 has accumulated more than 32 million flight hours and powers F-15 and F-16 aircraft as well as Hermeus Quarterhorse. The… - source: hermeus.com
• 2026-09-09 - Product Launch - Hermeus unveils Ramjet-X high-Mach test vehicle - Quarterhorse will carry Ramjet-X to the speed and altitude needed for ramjet operation, release it for high-Mach flight and return for later missions. The vehicle is designed to carry payloads, sensors, communications, compute, autonomy, materials and… - source: hermeus.com
• 2026-05-28 - Contract Award - Hermeus scales DIU high-Mach flight contract ceiling to $219M - The expanded scope covers work with the U.S. Air Force and U.S. Navy. The programme aims to demonstrate uncrewed aircraft reaching high-Mach speeds and releasing payloads in flight. The disclosed figure is a contract ceiling, not a statement that the full… - source: hermeus.com
• 2026-05-26 - Demonstration - Hermeus Quarterhorse Mk 2.1 completes first unmanned supersonic flight - The flight occurred 364 days after the maiden flight of the company's first aircraft, Quarterhorse Mk 1. Quarterhorse Mk 2.1 is powered by a Pratt & Whitney F100 engine and is the first of three F-16-scale vehicles in the current flight-test roadmap. Hermeus… - source: hermeus.com
• 2026-04-07 - Funding - Hermeus closes $200M Series C equity round within $350M financing package - Khosla Ventures led the equity round, with Canaan Partners, Founders Fund, In-Q-Tel and RTX Ventures among the returning investors. The package funds additional Quarterhorse aircraft, including the Mk 2.2 supersonic vehicle and Mk 2.3 Mach 3 demonstrator.… - source: hermeus.com