Mack-Cali Realty Corporation is a self-administered and self-managed real estate investment trust (REIT), which owns and operates a real estate portfolios consisted of Class A office and office/flex properties located in the Northeast. In January 2013, it acquired Alterra at Overlook Ridge IA in Metro Boston. In March 2013, it acquired the 828-unit multi-family property known as Crystal House in the Crystal City section of Arlington, Virginia. In April 2013, it acquired Alterra at Overlook Ridge IB in Metro Boston. In April 2013, the Company sold its 55 Corporate Drive office building located in Bridgewater, New Jersey. In July 2013, the Company sold its commercial office property at 40 Richards Avenue in Norwalk, Connecticut to The Davis Companies. Effective November 21, 2013, Mack-Cali Realty Corp acquired Park Square, a owner and operator of apartment buildings.