Pioneer Natural Resources Co shares are currently trading down about 4.8% on the day.

FORBES: PXD Makes Notable Cross Below Critical Moving Average

Pioneer Natural Resources Co shares are currently trading down about 3.5% on the day.

FORBES: Bearish Two Hundred Day Moving Average Cross - PXD

Since 2008, Southeastern has agitated for changes at nine U.S. companies, including energy firms Pioneer Natural Resources Co.

WSJ: Fund Firm at Center of Big Game Hunt

Among the largest underlying components of VO, in trading today CF Industries Holdings Inc ( NYSE: CF) is up about 0.8%, Mattel Inc ( NASD: MAT) is up about 0.7%, and Pioneer Natural Resources Co ( NYSE: PXD) is up by about 0.5%.

FORBES: Vanguard Mid-Cap ETF Experiences Big Inflow

Among the largest underlying components of VO, in trading today CF Industries Holdings Inc ( NYSE: CF) is down about 1.2%, Mattel Inc ( NASD: MAT) is up about 0.8%, and Pioneer Natural Resources Co ( NYSE: PXD) is up by about 1.2%.

FORBES: Notable ETF Inflow Detected - VO, CF, MAT, PXD