Facebook (FB) shares were down 1.3% in pre-market trading at 6:45 a.m. in New York Wednesday. Other major tech stocks were trading up by just under 1%.

According to the report, the social network had allowed Microsoft’s Bing search engine (MSFT) to see names of virtually all Facebook users’ friends without consent, and allowed other companies to read Facebook users’ private messages.

Steve Satterfield, Facebook’s director of privacy and public policy, told the NYT none of the partnerships violated users’ privacy, or a 2011 agreement with the U.S. Federal Trade Commission to require explicit permission from members before sharing their data.

In a statement published on its website on Wednesday, Facebook said its partnerships or features did not give companies access to information without people’s permission.

“Throughout our engagement with Facebook, we respected all user preferences,” a Microsoft spokesman said in a statement.

Shares of Facebook are down almost 20% for the year to date. Although all of the so-called FAANG stocks—an acronym that refers to Facebook, Apple (AAPL), Amazon.com (AMZN), Netflix (NFLX), and Google-parent Alphabet (GOOGL)‚were volatile throughout 2018, the social network is the group’s worst performer in 2018, fueled by fears of regulation over issues surrounding user data, misinformation, and privacy.

The Menlo Park, California-based company has been under fire since it learned earlier this year that personal information was transferred by an app developer to Cambridge Analytica, a political consulting firm that worked for Donald Trump’s 2016 presidential campaign. The company has spent the year trying to update its security and answer questions about the scandal from U.S. lawmakers and overseas policy makers.

In the process it’s been hit with fines in the U.K., admitted to the theft of intimate data from millions of users, and hired Nick Clegg, Britain’s former deputy prime minister, to run its lobbying efforts.