Stu Libby's path to venture capital is unusually direct: he built Zipdrug with Runa Capital as its largest investor, then became an LP in the fund before joining as a Venture Partner, and he also co-founded Circulate (formerly Solve Media) in adtech, giving him operating experience across two very different corners of tech. Outside of investing, he's also a competitive racecar driver who won the inaugural endurance series at Monticello Motor Club in a GT4-class car.