Rosenstein Hedge Fund Value Doubles In Q2; Picks Up FMC, CBS

Activist investor Barry Rosenstein's Jana Partners hedge fund roughly doubled in value during the second quarter to $16.16 billion according to its latest filing. New holdings of the fund include Apache Corp.

disclosed in July. Rosenstein said recently he's "in discussions" with Apache's management, urging them to divest international oil operations. Also new to Rosenstein's portfolio: 4.4 million shares of FMC Corp. (FMC). Shares of the chemical concern jumped 2 percent Friday to $66 a share. CBS Corp

made a new appearance in the portfolio, with Rosenstein acquiring 4 million shares. CBS was unchanged Thursday at $57.70. Rosenstein also added Equity Commonwealth

, acquiring 5.5 million shares of the real estate investment trust. Equity shares were up 0.26 percent Thursday. The filing also revealed a big addition to Rosenstein's position in Hertz Global Holdings Inc.

to 5.9 million shares, up from 125,000. Hertz was up recently 1.3 percent to $29.34 a share.