Investor Relations

Jeff D. Hedges
Executive Vice President, Chief Financial Officer and Secretary
T: 818-244-8080 ext. 1649
F: 818-242-0566
jhedges@psbusinessparks.com

Transfer Agent

American Stock Transfer & Trust Company
59 Maiden Lane
New York, NY 10038
T: 800-937-5449

Auditor

Ernst & Young LLP
Los Angeles, CA