O Shaughnessy Asset Management LLC grew its holdings in Lockheed Martin Co. (NYSE:LMT – Free Report) by 48.5% in the 1st quarter, HoldingsChannel reports. The institutional investor owned 66,818 shares of the aerospace company’s stock after acquiring an additional 21,812 shares during the period. O Shaughnessy Asset Management LLC’s holdings in Lockheed Martin were worth […]