Twitter COO Anthony Noto is stepping down to take the top job at SoFi, a personal finance start-up. Effective March 1st, Noto will become CEO at SoFi, and Twitter's COO role will be filled by “other members of Twitter’s leadership team,” according to the company. Twitter shares tumbled following the announcement.

Netflix posts a record-breaking Q4, adding more than 8 million subscribers worldwide. The earnings report painted a picture of a very successful 2017, with plans to invest much more next year. The streaming company credits its growth to an increase in original content.