额外空间存储 2025年度报告

FORM 11-K XANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACTOF 1934 For the fiscal year ended December31, 2025TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGEACT OF 1934For the Transition Period FromtoCommission File No.001-32269 A.Full title of the plan and the address of the plan, if different from that of the issuer named below:Extra Space Management, Inc. 401(k) Plan B.Name of issuer of the securities held pursuant to the plan and the address of its principal executiveoffice: Extra Space Storage Inc.2795 East Cottonwood Parkway, Suite 300Salt Lake City, Utah 84121 Extra Space Management, Inc. 401(k) PlanFinancial Statements and Supplemental SchedulesAs of December31, 2025 and 2024 and for the Year Ended December31, 2025 Report of Independent Registered Public Accounting Firm Audited Financial StatementsStatements of Assets Available for BenefitsStatement of Changes in Assets Available for Benefits Supplemental Schedule Exhibit 23.1 Consent of Independent Registered Public Accounting Firm REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Plan AdministratorsExtra Space Management, Inc. 401(k) Plan Opinion on the Financial StatementsWe have audited the accompanying statements of assets available for benefits of the Extra Space Management, Inc. 401(k) Plan (the Plan) as of December 31, 2025 and 2024, the related statement of changes in assets available forbenefits for the year ended December 31, 2025, and the related notes to financial statements (collectively referred to asthe financial statements). In our opinion, the financial statements present fairly, in all material respects, the assets Basis for OpinionThese financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on the Plan’s financial statements based on our audits. We are a public accounting firm registered with the Public CompanyAccounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Plan in We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan andperform the audits to obtain reasonable assurance about whether the financial statements are free of materialmisstatement, whether due to error or fraud. The Plan is not required to have, nor were we engaged to perform, an auditof its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal Our audits included performing procedures to assess the risks of material misstatement of the financial statements,whether due to error or fraud, and performing procedures that respond to those risks. Such procedures includedexamining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also Supplemental InformationThe supplemental information contained in the Schedule of Assets (Held at End of Year) has been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental information is the In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including itsform and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974, as amended. In our opinion, the supplemental We have served as the Plan’s auditor since 2023. Extra Space Management, Inc. 401(k) PlanNotes to Financial Statements 1.DESCRIPTION OF PLAN The following description of the Extra Space Management, Inc. 401(k) Plan (the “Plan”) provides only general information.Participants should refer to the Plan document, adoption agreement, and summary plan description for a more complete General The Plan is a qualified 401(k) defined contribution plan, covering all employees of Extra Space Management, Inc.(“Sponsor”) who have reached age 18. Employees are eligible after 3 months of service. The Plan is subject to the Extra Space Storage Inc. (the “Company”) appoints a committee to administer the Plan (the “Plan AdministrativeCommittee”). As of December31, 2025, the Plan Administrative Committee was comprised of three members of Contributions Contributions are made to the Plan by both employees and the Sponsor. Employee contributions to the Plan are deferralsof the employee’s compensation made through a direct reduction of compensation in each payroll period. Participatingemployees may contribute a percentage of their annual compensation up to 75% of eligible compensation, subject to thelimitations of the Internal Revenue Code (IRC). Participants can elect to make Regular 401(k) contributions, which areexcluded from the participant’s taxable income for federal income tax purposes until received as a withdrawal ordistribution from the Plan or Roth 401(k) contributions, which are not excluded