Amazon CEO Jeff Bezos Takes a Stake in Twitter (AMZN) CEO Jeff Bezos has taken a stake in Twitter, the red-hot microblogging service. Twitter announced the move in a blog post Tuesday. Bezos made the investment through Bezos Expeditions, a vehicle for his personal investments. Also investing in the company is venture firm Spark Capital; partner Bijan Sabet will take a seat on the Twitter board.

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