Billionaire investor and hedge fund manager - Carl Icahn restructured his portfolio holdings quite a bit during the fourth quarter of 2009, according to an SEC filing.

Icahn dropped his Yahoo's stake to just 12 million shares in December 2009, down from 62.9 million as on September.

In other noticeable rebalancing, no change of interests was reported in CIT Group and Motorola Icahn. Icahn through his affiliates own 12.1 million shares of CIT Group Inc and 119.8 million shares of Motorola Inc. Yesterday, Motorola announced a split of its business, a move Icahn believes is good for shareholders.

Icahn more than tripled his stake in Genzyme Corp. to 4.8 million shares from 1.45 million. The New York-based based investor increased his stake in Lions Gate to 18.5 per cent from 18.2 per cent twice in this month. He now holds
21.8 million shares or roughly 19 percent of the studio.

The increase in stake comes at a time when Lions Gate and Weinstein brothers are reportedly in talks with Walt Disney to buy its film unit - Miramax.