Venus Aerospace Raises $91M Series B for Hypersonic Engines

July 13, 2026

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Venus Aerospace, based in Houston, Texas, has closed a $91 million Series B round to scale production of its rotating detonation rocket engine. Houston-based Mercury Fund led the round, with participation from Lockheed Martin Ventures, MESH, PEAK6, Draper Associates, Starboard Star Venture Capital and Green Sands Equity.

Founded in 2020, Venus completed the first U.S. flight test of its high-thrust rotating detonation rocket engine about a year ago. The company says the engine can push vehicles to four to six times the speed of sound from a conventional runway and is roughly 15 percent more efficient than traditional options.

The funding will move the engine from flight demonstration toward deployment across near-term defense and space applications.

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