Interpublic Group has offloaded about half of its 0.4% stake in Facebook for $133 million, Financial Times reports. The media company did not disclose the name of the buyer and the number of shares it sold. The share sale values the social networking site at $66.5 billion. Interpublic will use the money for an existing program under which it is repurchasing shares of its common stock, adds The New York Times.

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