Billionaires are Crazy About These Stocks: Apple Inc. (AAPL), Google Inc (GOOG), Citigroup, Inc. (C), American International Group, Inc. (AIG)

American International Group, Inc. (NYSE:AIG), meanwhile, has the third-heaviest weighting in the Billionaire Hedge Fund Index with 14 billionaires holding long positions. Many notable investors—including George Soros and Louis Bacon—established positions in the last 13F-filing period (see George Soros’ top picks).

It appears that the primary bullish thesis on AIG is its settlement of the Treasury Department’s crisis-era bailout package. The insurer is now a leaner, meaner multinational, and its shares have gained 56.5% since the start of 2012. The company still trades at a mere 0.55 times its book value, indicating that there are still plenty of reasons for value-seeking investors to push AIG higher.

Citigroup, Inc. (NYSE:C) has 13 billionaires invested, including Ken Griffin and his fund, Citadel Investment Group. Griffin upped his stake in the banking behemoth by 213% in the third quarter, and shares have rewarded this move, popping 28.1% since last October. Over the longer run, Citigroup’s return has been equally as impressive, and it’s easy to see why this stock is an integral part of the Billionaire Hedge Fund Index. On a book value basis, Citigroup still trades at a 20% discount to the rest of its “Big Four” peers, and a greater focus on emerging markets should attract more growth-oriented investors moving forward.

Nexen Inc. (NYSE:NXY) also has 13 billionaires invested, as shares of the energy company have gained 6% since the end of September. This is a merger arbitrage play. Nexen was finally granted approval from the Canadian government to be acquired by Chinese CNOOC Limited (NYSE:CEO) late last year, but the agreement is still pending approval from U.S. officials. Shares of Nexen still trade at a 2.7% discount to CNOOC’s offer price of $27.50 a share.

Disclosure: I have no positions in any of the stocks mentioned above

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