Shares of Invitae Corporation (NYSE: NVTA) closed 11.57% higher on Friday after Cathie Wood, the CEO of Ark Invest, said the stock was undervalued. Wood's Ark Innovation ETF owns more than 18 million shares of Invitae, worth roughly $24 million as of Friday, so her company has a huge stake in the stock, which has declined more than 74% over the past year and more than 27% so far this year. Invitae specializes in genetic testing to improve healthcare outcomes.