Pin Oak Investment Advisors Inc. raised its position in Parker-Hannifin Co. (NYSE:PH – Free Report) by 20.9% during the 4th quarter, HoldingsChannel.com reports. The firm owned 156 shares of the industrial products company’s stock after acquiring an additional 27 shares during the period. Pin Oak Investment Advisors Inc.’s holdings in Parker-Hannifin were worth $72,000 at […]