Illinois Municipal Retirement Fund raised its stake in Lam Research Co. (NASDAQ:LRCX – Free Report) by 36.1% during the fourth quarter, HoldingsChannel.com reports. The institutional investor owned 18,184 shares of the semiconductor company’s stock after buying an additional 4,819 shares during the period. Illinois Municipal Retirement Fund’s holdings in Lam Research were worth $14,243,000 at […]