Martin Marietta Materials (NYSE:MLM) has declared a regular quarterly cash dividend of $0.55 a share on the Company’s outstanding common stock. The dividend is payable June 30 to shareholders of record at the close of business on June 1. It represents a cash dividend of $2.20 per share on an annualized basis. A leading supplier of building materials, including aggregates, cement, ready mixed concrete and asphalt has operations in 27 states, Canada and the Bahamas. More info: www.martinmarietta.com or www.magnesiaspecialties.com.