CEO of Collectors Holdings, a holding company focused on the collectibles industry. Before Collectors Holdings, Nat was co-founder and CEO of Flatiron Health, a technology company focused on the oncology industry that was acquired by Roche in 2018. Nat remains Chairman of Flatiron Health. Before co-founding Flatiron Health, Nat was co-founder and CEO of Invite Media, an advertising technology company based in NYC. Invite Media built the industry’s first enterprise advertising platform for buying and optimizing online media in real-time. Invite Media was acquired by Google in 2010. An active angel investor since 2010, Nat has invested in over 250 startups, including BarkBox, Cedar, Clover Health, Color Genomics, Headway, Imagen, Immuta, Oscar, Philo, Plaid, Ribbon Health, Workrise, Vise, and Zipline.