X0203 0001143313 AMERICAN STOCK EXCHANGE LLC 0000866368 PS BUSINESS PARKS INC/CA 001-10709

701 Western Avenue Glendale CA CALIFORNIA 91201-2397

(818) 244-8080 Depositary Shares representing 1/1,000 of a share of 8.75% Series F Cumulative Preferred Stock 17 CFR 240.12d2-2(a)(2) Kerri L. Ramirez Manager, Corporate Actions and Proxy Rulings 2007-01-29