Snap Inc. disclosed Tuesday afternoon that its chief financial officer, Tim Stone, plans to leave the company to “pursue other opportunities.” Shares fell in late trading after the announcement, showing declines of 3% to 8%. In a filing with the Securities and Exchange Commission, Snap said that a date for Stone’s departure has not been set, and that the official will remain at least through the earnings announcement planned for next month. Stone has been at Snap for less than a year, after being lured from Amazon.com Inc. in May 2018. Stone was one of the most prominent execs to arrive at Snapchat’s parent company last year, when a wave of executive departures created concerns about the company’s future. “Tim has made a big impact in his short time on our team and we are very grateful for all of his hard work,” Chief Executive Evan Spiegel said in an email to staff that was shared by a Snap spokesman Tuesday. “I know we have all benefitted from his customer focus and the way he has encouraged all of us to operate as owners.” Snap also said in the filing that its financial results would be near the top of its forecast: “We are finalizing our fourth quarter 2018 financial results and expect to report revenue and Adjusted EBITDA results that are slightly favorable to the top end of our previously reported quarterly guidance ranges for each.” Snap shares gained 3.7% in Tuesday’s regular session, but declined in after-hours trading following the disclosure.