| 4.17 | | | | | | Fifteenth Supplemental Indenture, dated as of August 8, 2025, among Extra Space Storage LP, as issuer, Extra Space Storage Inc., ESS Holdings Business Trust I and ESS Holdings Business Trust II, as guarantors, and Computershare Trust Company, N.A., as trustee, including the form of the Notes and the Guarantee. | | | 8-K | | | August 8, 2025 | | | 4.2 | | | | | |
| 4.18 | | | | | | Sixteenth Supplemental Indenture, dated as of July 6, 2026, among Extra Space Storage LP, as issuer, Extra Space Storage Inc., ESS Holdings Business Trust I and ESS Holdings Business Trust II, as guarantors, and Computershare Trust Company, N.A., as trustee, including the form of the Notes and the Guarantee. | | | 8-K | | | July 6, 2026 | | | 4.2 | | | | | |
| 4.19 | | | | | | Base Indenture, dated as of June 20, 2016, among Life Storage, Inc., Life Storage LP and Wells Fargo Bank, National Association (incorporated by reference to Exhibit 4.2 to the Annual Report on Form 10-K filed by Life Storage Inc. on February 24, 2023). | | | 8-K | | | July 25, 2023 | | | 4.1 | | | | | |
| 4.20 | | | | | | Sixth Supplemental Indenture, dated as of July 25, 2023, among Life Storage LP, as issuer, Life Storage LLC, as parent guarantor, and Computershare Trust Company, N.A., as trustee. | | | 8-K | | | July 25, 2023 | | | 4.2 | | | | | |
| 22.1 | | | | | | Issuer and Guarantors of Guaranteed Securities | | | | | | | | | | | | X | | |
| 31.1 | | | | | | Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | | | | | | | | | | | | X | | |
| 31.2 | | | | | | Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | | | | | | | | | | | | X | | |
| 32.1 | | | | | | Certifications of the Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. | | | | | | | | | | | | X | | |
| 101 | | | | | | The following materials from Extra Space Storage Inc.’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, are formatted in XBRL (eXtensible Business Reporting Language): (1) the Condensed Consolidated Balance Sheets, (2) the Condensed Consolidated Statements of Operations, (3) the Condensed Consolidated Statements of Comprehensive Income (4) the Condensed Consolidated Statements of Noncontrolling Interests and Equity, (5) the Condensed Consolidated Statements of Cash Flows and (6) notes to these financial statements. | | | | | | | | | | | | X | | |
| 104 | | | | | | Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101). | | | | | | | | | | | | X | | |