Virtual Mentorship: The Making of Buffalo's First Unicorn with Jack Greco, Co-founder of ACV Auctions (NYSE: ACVA)

Jack Greco is the co-founder and former Chief Financial Officer of ACV Auctions (NASDAQ: ACVA), an online automotive marketplace and services platform built for car dealers. As one of the early builders behind ACV's growth, he helped shape what it takes to build a real company in a legacy, operationally complex industry, where trust, transparency, and repeatable execution matter as much as product. At ACV, Jack operated at the intersection of finance, strategy, and scaling. He helped the company navigate the messy middle: turning early traction into dependable systems, building the infrastructure needed to support dealers at scale, and developing the discipline required for sustainable growth. His work reflects a core marketplace truth: the "hard part" isn't just creating demand, it's delivering consistent quality and confidence so customers come back again and again. Over time, Jack's path has expanded beyond founder/operator into ecosystem builder and investor, continuing to support early-stage teams tackling important, "unsexy" problems. He's especially drawn to founders building businesses with real operational depth, where winning means getting the fundamentals right, not just telling a great story. Whether it's advising on scaling playbooks, unit economics, or organizational execution, Jack brings a builder's perspective shaped by experience from the earliest days through IPO-scale outcomes. In this conversation, Jack will unpack the real playbook behind building and scaling a trust-heavy marketplace, how ACV earned credibility, what decisions mattered most early, and what founders often underestimate when operating in legacy industries. Expect candid lessons on leadership, scaling systems, and the realities of turning a big idea into an enduring company.