Great Lakes Advisors LLC decreased its holdings in shares of Patterson-UTI Energy, Inc. (NASDAQ:PTEN – Free Report) by 5.0% during the 4th quarter, HoldingsChannel.com reports. The institutional investor owned 702,718 shares of the oil and gas company’s stock after selling 36,856 shares during the period. Great Lakes Advisors LLC’s holdings in Patterson-UTI Energy were worth […]