Cathie Wood scooped up dozens of her favorite stocks for Ark Invest's exchange-traded funds (ETFs) last week. This has been a tough year for tech stocks across the board, and especially hard on shares of Exact Sciences (NASDAQ: EXAS), Adaptive Biotechnologies (NASDAQ: ADPT), and Surface Oncology (NASDAQ: SURF). Over the years, Ark Invest's exchange-traded funds have accumulated so many shares of Exact Sciences the firm now owns more than 7% of the company.
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