☒Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934For the fiscal year ended December 31, 2025☐Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934For the Transition Period Fromto. Commission file number001-32336 (Digital Realty Trust,Inc.)000-54023 (Digital Realty Trust,L.P.) Securities registered pursuant to Section12(g)of the Act: Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule405 of the Securities Act. Digital Realty Trust,Inc.Digital Realty Trust,L.P. Indicate by check mark if the registrant is not required to file reports pursuant to Section13 or Section15(d)of the Act. Digital Realty Trust,Inc.Digital Realty Trust,L.P. Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d)of the Securities Exchange Act of1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to suchfiling requirements for the past 90days. Digital Realty Trust,Inc.Digital Realty Trust,L.P. Table of Contents Index to Financial Statements Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405of Regulation S-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the registrant was required to submit suchfiles). Digital Realty Trust,Inc.Digital Realty Trust,L.P. Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company,or emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growthcompany” in Rule12b-2 of the Exchange Act.Digital Realty Trust,Inc.: Largeacceleratedfiler⌧Non-accelerated filer◻ Digital Realty Trust,L.P.: Largeacceleratedfiler◻Non-accelerated filer⌧ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying withany new or revised financial accounting standards provided pursuant to Section13(a) of the Exchange Act. Digital Realty Trust,Inc. Digital Realty Trust,L.P. Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internalcontrol over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C.7262(b)) by the registered public accounting firm thatprepared or issued its audit report. Digital Realty Trust,Inc.Digital Realty Trust,L.P. If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included inthe filing reflect the correction of an error to previously issued financial statements. Digital Realty Trust,Inc.Digital Realty Trust,L.P. Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensationreceived by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). Digital Realty Trust,Inc.Digital Realty Trust,L.P. Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act). Digital Realty Trust,Inc. Digital Realty Trust,L.P. The aggregate market value of the common equity held by non-affiliates of Digital Realty Trust, Inc. as of June 30, 2025, the last business day ofthe registrant’s most recently completed second quarter, totaled approximately $59 billion based on the closing price for Digital Realty Trust, Inc.’scommon stock on that day as reported by the New York Stock Exchange. Such value excludes common stock held by executive officers, directors and10% or greater stockholders as of June 30, 2025. The identification of 10% or greater stockholders as of June 30, 2025 is based on Schedule 13G andamended Schedule 13G reports publicly filed before June 30, 2025. This calculation does not reflect a determination that such parties are affiliates forany other purposes. There is no public trading market for the common units of Digital Realty Trust,L.P. As a result, the aggregate market value of the common unitsheld by non-affiliates of Digital Realty Trust,L.P. cannot be determined. Indicate the number of shares outstanding of each of the registrant’s classes of common stock, as of the latest practicable date. Digital Realty Trust, Inc.: PartIII incorporates by reference portions of Digital Realty Trust,Inc.’s Proxy Statement for its 2026 Annual Meeting of Stockholders which theregistrants anticipate will be filed no later than 120days after the end of their fiscalyear pursuant to Regulation14A. Table of Contents Index to Financial Statements EXPLANATORY NOTE This report combines the annual