Facebook Inc. FB, -6.77% chief information security officer Alex Stamos is leaving the company in August after disagreements within the company about how it should handle spreading disinformation, according to a New York Times report late Monday. The Times, citing unnamed current and former employees briefed on the matter, said that Stamos had been advocating that Facebook investigate and disclose the Russia-backed activity on the platform, but other executives such as Chief Operating Officer Sheryl Sandberg were dismayed by the suggestion. Stamos' day-to-day responsibilities were reassigned in December, but he will stay at the company until August to oversee the transition, the Times reported. After the Times published its story, Stamos tweeted that he was still "fully engaged with my work at Facebook. It's true that my role did change. I'm currently spending more time exploring emerging security risks and working on election security." Facebook stock is down 1% in late trading, after closing down 6.8% to $172.56 on Monday. Facebook stock is down 1.7% this year, as the S&P 500 index SPX, -1.42% has gained 2.9%.