Cathie Wood's Ark Invest funds bought over 1.3 million shares of Twitter amid the stock's sell-off

Star fund manager Cathie Wood significantly increased her shares of Twitter, buying into a steep decline for the social media stock.

Twitter's stock price dropped more than 15% on Friday for its fifth-straight day of declines. On Thursday evening, the company reported slower-than-expected user growth for the first quarter and soft revenue guidance for the second quarter.