PS Business Parks, Inc. (NYSE:PSB) announced today that it intends to release its fourth quarter 2011 earnings after the close of business on Tuesday, February 21, 2012. A conference call is scheduled for Wednesday, February 22, 2012, at 10:00 a.m. (PST) to discuss the fourth quarter results. The toll free number is (888) 299-3246; the conference ID is 48639250. The call will also be available via a live webcast on the Company’s website. A replay of the conference call will be available through February 29, 2012 at (855) 859-2056, as well as via webcast on the Company’s website. Company Information PS Business Parks, Inc., a member of the S&P SmallCap 600, is a self-advised and self-managed equity real estate investment trust (“REIT”) that acquires, develops, owns and operates commercial properties, primarily multi-tenant flex, office and industrial space. The Company defines “flex” space as buildings that are configured with a combination of office and warehouse space and can be designed to fit a number of uses (including office, assembly, showroom, laboratory, light manufacturing and warehouse space). As of December 31, 2011, the Company wholly owned 27.2 million rentable square feet with approximately 4,400 customers located in eight states, concentrated in California (11.1 million sq. ft.), Virginia (4.2 million sq. ft.), Florida (3.7 million sq. ft.), Texas (3.3 million sq. ft.), Maryland (2.4 million sq. ft.), Oregon (1.3 million sq. ft.), Arizona (0.7 million sq. ft.) and Washington (0.5 million sq. ft.). Additional information about PS Business Parks, Inc. is available on the Company’s website at www.psbusinessparks.com.