Nov. 11 (Bloomberg) -- Pam Kramer, a marketing vice president at Twitter Inc., has left the microblogging service, becoming the latest executive to depart under Chief Executive Officer Dick Costolo, two people familiar with the matter said.
Kramer, who was hired in July after a stint as chief marketing officer at E*Trade Financial Corp., exited from San Francisco-based Twitter after less than three months, said the people, who asked not to be identified because the move hasn’t been announced.
Co-founders Evan Williams and Biz Stone have lessened their involvement under Costolo, who became CEO in October 2010. Sean Garrett, head of communications, announced his departure this week, and Mike Abbott, engineering vice president, resigned last month. Kramer’s appointment was aimed at making Twitter more appealing to consumers, the company said at the time.
Stone’s decision to step back from Twitter this year, joining Williams at startup incubator Obvious Corp., left the microblogging service without the full attention of any of its creators. Co-founder Jack Dorsey divides his time between Twitter and mobile-payment company Square Inc.
Twitter has aimed to become “more approachable” to mainstream audiences outside of Silicon Valley, Dorsey said during an event in March.
Carolyn Penner, a spokeswoman for Twitter, declined to comment.
Twitter will generate $139.5 million this year from ads, according to EMarketer Inc., which pared its estimate from $150 million because the microblogging website has been slow to roll out some services.
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