EXR

exr-202602190001289490false00012894902026-02-192026-02-19

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

February 19, 2026 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02Results of Operations and Financial Condition

On February 19, 2026, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months and year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01        Financial Statements and Exhibits

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated February 19, 2026

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:February 19, 2026By/s/ Jeff Norman Name:Jeff Norman Title:Executive Vice President and Chief Financial Officer

exr-202510290001289490false00012894902025-10-292025-10-29

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

October 29, 2025 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02Results of Operations and Financial Condition

On October 29, 2025, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and nine months ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01        Financial Statements and Exhibits

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated October 29, 2025

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:October 29, 2025By/s/ Jeff Norman Name:Jeff Norman Title:Executive Vice President and Chief Financial Officer

exr-202507300001289490false00012894902025-07-302025-07-30

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

July 30, 2025 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02Results of Operations and Financial Condition

On July 30, 2025, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and six months ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01        Financial Statements and Exhibits

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated July 30, 2025

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:July 30, 2025By/s/ Jeff Norman Name:Jeff Norman Title:Executive Vice President and Chief Financial Officer

exr-202504290001289490false00012894902025-04-292025-04-29

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

April 29, 2025 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On April 29, 2025, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months ended March 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated April 29, 2025

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:April 29, 2025By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202502250001289490false00012894902025-02-252025-02-25

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

February 25, 2025 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On February 25, 2025, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months and year ended December 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated February 25, 2025 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:February 25, 2025By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202410290001289490false00012894902024-10-292024-10-29

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

October 29, 2024 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On October 29, 2024, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and nine months ended September 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated October 29, 2024 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:October 29, 2024By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202407300001289490false00012894902024-07-302024-07-30

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

July 30, 2024 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On July 30, 2024, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and six months ended June 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated July 30, 2024 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:July 30, 2024By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202404300001289490false00012894902024-04-302024-04-30

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

April 30, 2024 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On April 30, 2024, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months ended March 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated April 30, 2024 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:April 30, 2024By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202402270001289490false00012894902024-02-272024-02-27

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

February 27, 2024 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On February 27, 2024, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months and year ended December 31, 2023. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated February 27, 2024 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:February 27, 2024By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202311070001289490false00012894902023-11-072023-11-07

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

November 7, 2023 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On November 7, 2023, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and nine months ended September 30, 2023. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated November 7, 2023 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:November 7, 2023By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202308030001289490false00012894902023-08-032023-08-03

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

August 3, 2023 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☒Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On August 3, 2023, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and six months ended June 30, 2023. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated August 3, 2023 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:August 3, 2023By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202305020001289490false00012894902023-05-022023-05-02

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

May 2, 2023 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☒Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On May 2, 2023, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months ended March 31, 2023. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated May 2, 2023 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:May 2, 2023By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202302220001289490false00012894902023-02-222023-02-22

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

February 22, 2023 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On February 22, 2023, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the for the three months and year ended December 31, 2022. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated February 22, 2023 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:February 22, 2023By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202211010001289490false00012894902022-11-012022-11-01

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

November 1, 2022 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On November 1, 2022, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and nine months ended September 30, 2022. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated November 1, 2022 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:November 1, 2022By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202208020001289490false00012894902022-08-022022-08-02

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

August 2, 2022 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On August 2, 2022, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and six months ended June 30, 2022 A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated August 2, 2022 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:August 2, 2022By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202205030001289490false00012894902022-05-032022-05-03

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

May 3, 2022 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On May 3, 2022, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months ended March 31, 2022. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated May 3, 2022 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:May 3, 2022By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202202230001289490false00012894902022-02-232022-02-23

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

February 23, 2022 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On February 23, 2022, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months and year ended December 31, 2021. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated February 23, 2022 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:February 23, 2022By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202110270001289490false00012894902021-10-272021-10-27

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

October 27, 2021 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On October 27, 2021, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and nine months ended September 30, 2021. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated October 27, 2021 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:October 27, 2021By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202107270001289490false00012894902021-07-272021-07-27

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

July 27, 2021 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On July 27, 2021, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three and six months ended June 30, 2021. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith: Exhibit Number  Description of Exhibit 99.1 Press Release dated July 27, 2021 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:July 27, 2021By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer

exr-202104280001289490false00012894902021-04-282021-04-28

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

April 28, 2021 (Date of Report (Date of Earliest Event Reported))

EXTRA SPACE STORAGE INC.

(Exact Name of Registrant as Specified in Its Charter)

Maryland 001-32269 20-1076777 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification Number)

2795 East Cottonwood Parkway, Suite 300 Salt Lake City, Utah 84121 (Address of Principal Executive Offices) (801) 365-4600 (Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934

Title of each classTrading symbolName of each exchange on which registered

Common Stock, $0.01 par valueEXRNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

ITEM 2.02RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On April 28, 2021, Extra Space Storage Inc. (the “Company”) issued a press release announcing its financial results for the three months ended March 31, 2021. A copy of the press release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein. The information contained in this Current Report, including the exhibit referenced herein, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any filing of Extra Space Storage Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

ITEM 9.01        FINANCIAL STATEMENTS AND EXHIBITS

(d) The following exhibit is furnished herewith:

Exhibit Number  Description of Exhibit 99.1 Press Release dated April 28, 2021 104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXTRA SPACE STORAGE INC.

Date:April 28, 2021By/s/ P. Scott Stubbs Name:P. Scott Stubbs Title:Executive Vice President and Chief Financial Officer