PROOF Fund, also known as the Pro Rata Opportunity Fund, is a venture capital firm that specializes in investing alongside early-stage venture capital funds to maximize the upside in their top-performing companies. By exercising pro-rata rights, PROOF enables these early investors to maintain their ownership stakes and board influence in high-growth companies. This strategy allows PROOF to build a diversified portfolio of category-leading companies across various sectors, including foodtech, healthtech, fintech, and more.

The firm focuses on hypergrowth, category leaders, and top-performing companies, aiming to provide its limited partners with exposure to a broad range of industries and trends over a three-year investment period. Founded in 2015 and headquartered in Reston, Virginia, PROOF Fund has made investments in notable companies such as Beyond Meat, Zipline, Ursa Major, Overtime, ICON BUILD, and DailyPay.