Hermeus completes Quarterhorse Mk 2.1 maiden flight, raises $350M to scale hypersonic production
Hermeus completed the maiden flight of its uncrewed Quarterhorse Mk 2.1 from Spaceport America in early March and closed a $350 million Series C (about $1 billion valuation) to move from prototypes toward production-scale, mission‑ready high‑Mach platforms aimed at U.S. defense customers.