The No. 2 of
Chief Operating Officer Ali Rowghani resigned after previous reports that his duties with the company had diminished.
"Goodbye Twitter. It's been an amazing ride, and I will cherish the memories," Rowghani tweeted at 7:05 a.m.
Hours later Chloe Sadden, head of North America media, sent a series of tweets announcing that she was leaving and expressing pride in having served the company.
"These sorts of opportunities, this sort of company, only comes around once in a blue moon," Sadden tweeted. Adding later: "Now it's time for my next chapter. #staytuned #thankyou #sleep."
Rowghani will remain with the company "as a strategic advisor to the CEO," according to a Securities and Exchange Commission filing.
Twitter will not replace Rowghani, the securities report says, whose duties will be taken over by other members of the management team.
Rowghani is the former chief financial officer at
Rowghani's resignation comes a day after Re/code, a tech news site launched in January, reported that there probably would be a shake-up on Twitter's executive level.
Twitter Chief Executive Dick Costolo showed his appreciation for Rowghani's efforts via a tweet Thursday.
“Thank you for being an incredible executive & partner. Twitter could not have succeeded without you.”