Billionaire investor Carl Icahn acquired stakes in Genzyme Corporation(NDAQ:GENZ) and Harrah's Entertainment Inc. (NYSE:HET) after selling his stakes in Kraft Foods Inc. (NYSE:KFT) and Clear Channel Communications Inc. (NYSE:CCU), according to a Schedule 13F filing released Wednesday. Shareholders are hoping that the activist investor will work to unlock value in some of these new investments.

Icahn also reported new stakes in several video game providers (TTWO, PLCE), medical companies (MOGN, CYBX, ACOR, CRA, ABI, LSR), and gas and oil companies (CMT, TLM). Interestingly, he sold off his stake in aluminum producers (AA, AL). Meanwhile, he significantly increased his stake in larger companies like BEAS, MOT, REGN, and APC.

Carl Icahn is well known in the investment community as an activist investor willing to do what it takes to unlock value in his investments. The investor has ousted several CEOs and enforced "strategic alternatives" like share buybacks and outright sales. It is likely that at least his stake in BEAS will result in an activist situation. Combined these factors make Carl Icahn worth watching!

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