Bo Fishback has built and exited companies with very different playbooks—from a hard-tech venture to a profit-focused startup to a full blitzscale play—and he's known for turning orphaned scientific inventions into real businesses, going back to a company built around a scientist's stalled tech and later helping postdocs at Kauffman do the same. He's also described as unusually persuasive in person, ran memorable launch stunts like Zaarly's big-bang release with street teams and personalized videos, tends to invest in founders he's already helping rather than working purely as a check-writer, helped provide early funding tied to what became AngelList, and says he stays in early-stage investing mainly to keep close to builders and avoid stepping away from creating things.