X0306 4 2013-12-26 0 0001035443 ALEXANDRIA REAL ESTATE EQUITIES INC ARE 0001533566 Richardson Stephen C/O ALEXANDRIA REAL ESTATE EQUITIES, INC 385 EAST COLORADO BOULEVARD, SUITE 299 PASADENA CA 91101 0 1 0 0 Chief Operating Officer Common Stock 2013-12-26 4 S 0 4500 64.09 D 63007 D The shares were sold at prices ranging form $63.67 to $64.30. The reporting person will provide upon request to the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price. /s/ Eric Steiner, Attorney-in-fact 2013-12-26