In an amended 13D filing, Bill Ackman increased his holdings in General Growth Properties (NYSE: GGP)

On December 5th, 2008, Pershing Square owned 20,080,690 shares or 7.5% of General Growth Properties. As of January 9th, 2009, Ackman’s Pershing Square now owns 22,901,194 shares or 7.4% of GGP.

Pershing purchased 2.82 million shares or $4,822,035 worth of General Growth Properties shares.

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