0001181431-06-053197 4 1 20060913 20060915 20060915 Digital Realty Trust, Inc. 0001297996 6798 000000000 MD 0726 560 MISSION STREET SUITE 2900 SAN FRANCISCO CA 94105 (415)738-6500 560 MISSION STREET SUITE 2900 SAN FRANCISCO CA 94105 Stein A William 0001307117 4 34 001-32336 061093488 (650) 233-3600 DIGITAL REALTY TRUST, INC. 2730 SAND HILL ROAD, SUITE 280 MENLO PARK CA 94025 4 1 rrd130394.xml STEIN OPTION EXERCISE 9/13/06