X0306 4 2016-08-19 0 0000866368 PS BUSINESS PARKS INC/CA PSB 0001230471 RUSSELL JOSEPH D JR C/O PS BUSINESS PARKS, INC. 701 WESTERN AVENUE GLENDALE CA 91201 1 0 0 0 Common Stock 2016-08-19 4 S 0 2000 108.4542 D 58539 D Represents weighted average sale price. These shares were sold at prices ranging from $108.00 to $111.84. Full information regarding the number of shares sold at each separate price will be provided by the reporting person upon request to the staff of the Securities and Exchange Commission, the issuer or a security holder of the issuer. Includes 28,682 restricted stock units. /s/ Lily Yan Hughes, Attorney-in-Fact 2016-08-22