 Vanguard Group Inc. trimmed its holdings in shares of OGE Energy Corp. NYSE:OGE by 3.6 in the second quarter, Holdings Channel reports. The firm owned 20,242,228 shares of the utilities providers stock after selling 751,379 shares during the period. Vanguard Group Inc. owned about 0.10 of OGE Energy worth 614,555,000 at the end of the ... 