0001181431-08-068276 4 1 20081217 20081218 20081218 Digital Realty Trust, Inc. 0001297996 6798 000000000 MD 1231 560 MISSION STREET SUITE 2900 SAN FRANCISCO CA 94105 (415)738-6500 560 MISSION STREET SUITE 2900 SAN FRANCISCO CA 94105 Peterson Scott E 0001307041 4 34 001-32336 081258589 (650) 233-3600 DIGITAL REALTY TRUST, INC. 2730 SAND HILL ROAD MENLO PARK CA 94025 4 1 rrd226989.xml FORM 4 FOR SCOTT PETERSON (OPTION EXERCISE)