Cathie Woods ARK ETFs have recently made major changes in some of their funds. Recent trades suggest they are buying the dip on names like TDOC, ROKU, and NVDA. The ARK innovation etfs have been known to load up on shares in times of rough market conditions. ark etf roku Cathie Woods is most known for her position in Tesla, which she as been slowly off-loading in most of the ARK funds. Many criticize her for her risk for appetite, but only time will tell whether these stocks take off over the next several years.