Snap Inc. is losing another executive as Chief Financial Officer Tim Stone is set to leave the company after only eight months on the job.

Stone, who had worked at Amazon.com Inc. for nearly 20 years, most previously in the position of vice president of finance, joined Snap in May, replacing the company’s founding CFO Drew Vollero.

The departure was announced at a U.S. Securities and Exchange Commission filing today. A date for Stone’s departure wasn’t specified, and he may have some time left at the company. Variety reported that he will stay on through the company’s next earnings report, which is scheduled for Feb. 5.

“Tim has made a big impact in his short time on our team and we are very grateful for all of his hard work,” Snap Chief Executive Officer Evan Spiegel (pictured) said in a memo to employees. “I know we have all benefited from his customer focus and the way he has encouraged all of us to operate as owners.”

Addressing the obvious question, Spiegel added, “Tim’s transition is not related to any disagreement with us on any matter relating to our accounting, strategy, management, operations, policies, regulatory matters or practices (financial or otherwise).”

Officially Stone is leaving Snap to pursue other opportunities. In walking away, Stone is forfeiting much of a $20 million pay package that included vesting over four years.

Despite the attempts to spin the departure, the fact that Stone’s leaving so quickly has only led to growing investor concerns about how Snap is being managed, not helped by multiple other executive departures in the last six months. Starting in September, Snap has lost Chief Strategy Officer Imran Khan, followed by Vice President of Content Nick Bell, Vice President of Marketing Steve Labella and Vice President of Business Solutions Kristen O’Hara.

“SNAP’s recent exodus underscores a spate of challenges the company has faced as it squares off against Instagram and addresses ongoing challenges related to its app redesign, particularly technical issues on Android,” Cowen & Co. analyst John Blackledge wrote in a note to clients. But he added, “Despite the turnover and challenges, our most recent Ad Buyer survey reflects rising buyer adoption of SNAP overall, and more positive views on pricing and ROI since the move to the auction.”

Share in Snap dropped as much as 9 percent in after-hours trading before recovering a bit to fall 7 percent, to $6.08. That’s still up from Snap’s 12-month low of $4.99 per share Dec. 21.

Photo: jdlasica/Flickr