Nathaniel Turner is a Co-Owner of Goldin Auctions. He is a Co-Founder and serves as Chairman at Flatiron. He serves as Executive Chairman and Chief Executive Officer at Collectors Universe. Mr. Turner serves as Board Member at OneOncology. He is also an Angel Investor. He served as Board Member at Sema4. He also serves as Executive Chairman at Collectors Universe. Mr. Turner oversees all initiatives across provider solutions, clinical oncology, business development, sales operations, legal and other corporate functions. Before co-founding Flatiron Health, he was co-founder and CEO of Invite Media, an advertising technology company based in NYC. He also serves as a General Partner at Operator Partners. Invite Media was acquired by Google in 2010. Prior to Invite Media, Mr. Turner started numerous internet companies and also worked at Say Media and First Round Capital. An active angel investor, he has invested in over 30 technology startups throughout the country, including Bell Biosystems, Clover Health, Color Genomics, Doctor Evidence, Gravie, Notable Labs, Oscar and Quarter Health.