5 Companies That Had A Rough Week

Twitter COO Steps Down As Company's Growth Stalls

Twitter Chief Operating Officer Ali Rowghani abruptly resigned this week following reports the social media company's executive team is undergoing a shake-up and Rowghani had clashed with CEO Dick Costolo. The dissension reportedly stems from Twitter's inability to grow its user base.

Twitter announced the changes in a Securities and Exchange Commission filing, saying Twitter will retain Rowghani as an adviser to Costolo. Rowghani, appropriately enough, announced his resignation in a tweet: "Goodbye Twitter. It's been an amazing ride, and I will cherish the memories."

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