Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2019 ¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Transition Period From to . Commission file number 001-32336 (Digital Realty Trust, Inc.) 000-54023 (Digital Realty Trust, L.P.) DIGITAL REALTY TRUST, INC. DIGITAL REALTY TRUST, ...