Passport Capital’s 13f filing with the Securities and Exchange Commission (SEC) for the fourth quarter of 2012 showed that its major stock picks include: Williams Companies, Inc. (NYSE:WMB) with 1,864,700 shares, UnitedHealth Group Inc. (NYSE:UNH) with 828,100 shares, and Anglo Gold Ashanti  (TSE:AU) (NYSE:AU) with 1,404,156.

The hedge fund managed by John Burbank also reported large call options to buy Schlumberger Limited. (NYSE:SLB) for 1,545,000 shares and Utilities SPDR (ETF) (NYSEARCA:XLU) for 1.3 million shares.

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During the quarter, Passport Capital’s assets under management increased from more than $2.2 billion to approximately $2.59 billion. The investment management firm acquired 65 new stocks, and sold its entire stake in 94 stocks. Passport Capital also increased its stock holdings across 37 stocks and reduced its stake in 26 stocks.

Passport Capital purchased more than 4.5 million shares of AK Steel Holding Corporation (NYSE:AKS), 3,394,316 shares of Gold Field Limited (ADR) (NYSE:GFI), 1,324,000 shares of ArcelorMittal (ADR) (NYSE:MT), 1,541,568 shares of PennyMac Mortgage Investment Trust (NYSE:PMT), and 388,322 shares of Westlake Chemical Corporation (NYSE:WLK).

The hedge fund increased its stake in ITC Holdings Corp. (NYSE:ITC) by 173,773 shares, Kaiser Aluminum Corp. (NASDAQ:KALU) by 29,100 shares, Pretium Resources, Inc. Ordinary Shares (NYSE:PVG) by 1,419,617 shares, QUALCOMM, Inc. (NASDAQ: QCOM) by 27,000 shares, and Rowan Companies PLC (NYSE:RDC) by 163,900 shares.

Passport Capital reduced its stock holdings in Lockheed Martin Corporation (NYSE:LMT) by 413,900 shares,  Las Vegas Sands Corp (NYSE:LVS) by 578, 339 shares, Marathon Petroleum Corp (NYSE:MPC) by 16,930 shares, Nucor Corporation (NYSE:NUE) by 268,587 shares, and Reliance Steel & Aluminum (NYSE:RS) by 150,000 shares.

Passport Capital sold its entire stake in Wynn Resorts, Limited (NASDAQ:WYNN), Apple Inc. (NASDAQ:AAPL), and Ecolab Inc. (NYSE:ECL), Transocean LTD (NYSE:RIG), Market Vectors Oil Services ETF (NYSEARCA:OIH), and SPDR S&P 500 ETF Trust (NYSEARCA:SPY).

The hedge fund’s investments in the fourth quarter represent 62.5 percent in basic materials, 7.6 percent in consumer goods, and 9.8 percent in health care and 2.8 percent in financials among others. Passport Capital is managed by John Burbank.