EXR US Equity☆

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the financial statements and notes thereto appearing elsewhere in this report. We make statements in this section that are forward-looking statements within the meaning of the federal securities laws. For a complete discussion of forward-looking statements, see the section in this Form 10-K entitled “Statements Regarding Forward-Looking Information.” Certain risk factors may cause actual results, performance or achievements to differ materially from those expressed or implied by the following discussion. For a discussion of such risk factors, see the section in this Form 10-K entitled “Risk Factors.” Dollar amounts in thousands, except share and per share data, unless otherwise stated.

OVERVIEW

We are a fully integrated, self-administered and self-managed REIT, formed to own, operate, manage, acquire, develop and redevelop self-storage properties (“stores”). We derive substantially all of our revenues from our two segments: storage operations and tenant reinsurance. Primary sources of revenue for our storage operations segment include rents received from tenants under leases at each of our wholly-owned stores. Our operating results depend materially on our ability to lease available self-storage units, to actively manage unit rental rates, and on the ability of our tenants to make required rental payments. Consequently, management spends a significant portion of their time maximizing cash flows from our diverse portfolio of stores. Revenue from our tenant reinsurance segment consists of insurance revenues from the reinsurance of risks relating to the loss of goods stored by tenants in our stores.

Our stores are generally situated in highly visible locations clustered around large population centers. The clustering of our assets around these population centers enables us to reduce our operating costs through economies of scale. To maximize the performance of our stores, we employ industry-leading revenue management systems. Developed by our management team, these systems enable us to analyze, set and adjust rental rates in real time across our portfolio in order to respond to changing market conditions. We believe our systems and processes allow us to more pro-actively manage revenues.

We operate in competitive markets, often where consumers have multiple stores from which to choose. Competition has impacted, and will continue to impact, our store results. We experience seasonal fluctuations in occupancy levels, with occupancy levels generally higher in the summer months due to increased moving activity. We believe that we are able to respond quickly and effectively to changes in local, regional and national economic conditions by adjusting rental rates through the combination of our revenue management team and our industry-leading technology systems. We consider a store to be in the lease-up stage after it has been issued a certificate of occupancy, but before it has achieved stabilization. We consider a store to be stabilized once it has achieved either an 80% occupancy rate for a full year measured as of January 1 of the current year, or has been open for three years prior to January 1 of the current year.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Our financial statements have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. On an ongoing basis, we evaluate our estimates and assumptions, including those that impact our most critical accounting policies. We base our estimates and assumptions on historical experience and on various other factors that we believe are reasonable under the circumstances. A summary of significant accounting policies is also provided in the notes to our consolidated financial statements (see Note 2 to our consolidated financial statements). Actual results may differ from these estimates. We believe the following are our most critical accounting policies and estimates:

CONSOLIDATION: Arrangements that are not controlled through voting or similar rights are accounted for as variable interest entities (“VIEs”). An enterprise is required to consolidate a VIE if it is the primary beneficiary of the VIE.

Under certain circumstances when we enter into arrangements for the formation of joint ventures, a VIE may be created. The primary factors that require the most judgment in determining whether the joint venture is a VIE are whether the decisions that most significantly impact the entity’s economic performance were controlled by the equity holders as a group, and whether the joint venture has sufficient equity to finance its activities without additional subordinated support.

If the joint venture is determined to be a VIE, we perform a qualitative analysis, including considering which party, if any, has the power to direct the activities most significant to the economic performance of each VIE and whether that party has the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. If we are determined to be the primary beneficiary of the VIE, the assets, liabilities and operations of the VIE are consolidated within

21

our financial statements. Otherwise, our investment is generally accounted for under the equity method. Our ability to correctly assess the influence or control over an entity affects the presentation of the investment in our consolidated financial statements.

REAL ESTATE ASSETS: We account for the acquisition of stores, including by merger and other acquisitions of real estate, in accordance with ASC 805-10, "Business Combinations." We use our judgment to determine if assets acquired meet the definition of a business or if the acquisition should be considered an asset acquisition. We must make significant assumptions and estimates in determining the fair value of the tangible and intangible assets and liabilities acquired and consideration transferred. These fair value estimates are sensitive to: price of land per square foot and current replacement cost estimates, including adjustments for the age, class, height, square footage, condition, location, and turnkey factor. These assumptions and estimates require judgment, and therefore others could come to materially different conclusions as to the estimated fair values, which could result in differences in depreciation and amortization expense, gains and losses on the sale of real estate assets, and real estate and intangible asset values.

EVALUATION OF ASSET IMPAIRMENT: Long lived assets held for use are evaluated for impairment when events or circumstances indicate that there may be impairment. We review each store at least annually to determine if any such events or circumstances have occurred or exist. We focus on stores where occupancy and/or rental income have decreased by a significant amount. For these stores, we determine whether the decrease is temporary or permanent and whether the store will likely recover the lost occupancy and/or revenue in the short term. In addition, we review stores in the lease-up stage and compare actual operating results to original projections. We may not have identified all material facts and circumstances that affect impairment of our stores. No material impairments were recorded in the year ended December 31, 2023.

We evaluate goodwill for impairment at least annually and whenever events, circumstances, and other related factors indicate that fair value of the related reporting unit may be less than the carrying value. If the fair value of the reporting unit is determined to exceed the aggregate carrying amount, no impairment charge is recorded. Otherwise, an impairment charge is recorded to the extent the carrying amount of the goodwill exceeds the amount that would be allocated to goodwill if the reporting unit were acquired for estimated fair value. No impairments were recorded in our evaluations for any period presented herein.

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES: We hold a number of derivative instruments which we use to hedge our exposure to variability in expected future cash flows, mainly related to our interest rates on variable interest debt. We do not use derivatives for trading or speculative purposes. We assess our derivatives both at inception, and on an ongoing quarterly basis, for whether the derivatives used in hedging transactions are effective. The rules and interpretations relating to the accounting for derivatives are complex. Failure to apply this guidance correctly may require us to recognize all changes in fair value of the hedged derivative in earnings, which may materially impact our results.

INCOME TAXES: We have elected to be treated as a REIT under Sections 856 through 860 of the Internal Revenue Code. In order to maintain our qualification as a REIT, among other requirements, we are required to distribute at least 90% of our REIT taxable income to our stockholders and meet certain tests regarding the nature of our income and assets. As a REIT, we are not subject to U.S. federal income tax with respect to that portion of our income which meets certain criteria and is distributed annually to our stockholders. We plan to continue to operate so that we meet the requirements for taxation as a REIT. Many of these requirements, however, are highly technical and complex. For any taxable year that we fail to qualify as a REIT and for which applicable statutory relief provisions did not apply, we would be subject to U.S. federal corporate income tax on all of our taxable income for at least that year and the ensuing four years. We could also be subject to penalties and interest, and our net income may be materially different from the amounts reported in our financial statements.

We have elected to treat certain corporate subsidiaries, including Extra Space Management, Inc., as a TRS. In general, a TRS may perform additional services for tenants and generally may engage in any real estate or non-real estate related business. A TRS is subject to U.S. federal corporate income tax and may also be subject to state and local income taxes. Interest and penalties relating to uncertain tax positions will be recognized in income tax expense when incurred. If tax authorities determine that amounts paid by any of our TRSs to us are not reasonable compared to similar arrangements among unrelated parties, we could be subject to a penalty tax on the excess payments.

RECENT ACCOUNTING PRONOUNCEMENTS

For a discussion of recent accounting pronouncements affecting our business, see Item 8, “Financial Statements and Supplementary Data–Recently Issued Accounting Standards.”

22

RESULTS OF OPERATIONS

Comparison of the Year Ended December 31, 2023 to the Year Ended December 31, 2022

Overview

Results for the year ended December 31, 2023 included the operations of 2,377 stores (1,903 wholly-owned, two in a consolidated joint venture, and 472 in joint ventures accounted for using the equity method) compared to the results for the year ended December 31, 2022, which included the operations of 1,451 stores (1,132 wholly-owned, one in a consolidated joint venture, and 318 in joint ventures accounted for using the equity method). Material or unusual changes in the results of our operations are discussed below.

Revenues

The following table presents information on revenues earned for the years indicated:

For the Year Ended December 31,

Property Rental—The increase in property rental revenues for the year ended December 31, 2023 was primarily the result of an increase of $507,054 associated with our merger with Life Storage on July 20, 2023, (the "Life Storage Merger" or "Merger") and other acquisitions completed in 2023. We acquired 757 wholly-owned stores in the Merger and an additional 14 stores during the year ended December 31, 2023. We acquired 153 stores during the year ended December 31, 2022. In addition to the increase attributable to the Merger, property rental revenues increased by $46,712 due to operating results at our stabilized stores and increased by $7,523 as a result of increases in occupancy at our lease-up stores.

Tenant Reinsurance—The increase in tenant reinsurance revenues was due primarily to an increase in the number of stores operated. We operated 3,714 stores at December 31, 2023, compared to 2,338 stores at December 31, 2022.

Management Fees and Other Income—Management fees and other income represent the fees collected for our management of stores owned by third parties and unconsolidated joint ventures and other transaction fee income. The increase for the year ended December 31, 2023 was primarily due to an increase in the number of stores managed. As of December 31, 2023, we managed 1,811 stores for third parties and joint ventures compared to 1,206 stores as of December 31, 2022.

23

Expenses

The following table presents information on expenses for the years indicated:

For the Year Ended December 31,

Life Storage Merger transition costs 66,732 — 66,732 — %

Property Operations—The increase in property operations expense consists primarily of an increase of $153,712 associated with the Life Storage Merger and other acquisitions completed in 2023. We acquired 757 wholly-owned stores in the merger and an additional 14 stores during the year ended December 31, 2023. We acquired 153 stores during the year ended December 31, 2022. Additionally, property operations expense increased $22,097 at stabilized stores due to increased marketing expense, credit card processing fees and insurance.

Tenant Reinsurance—Tenant reinsurance expense represents the costs that are incurred to provide tenant reinsurance. The increase in tenant reinsurance expense for the year ended December 31, 2023 was due primarily to the increase in total number of stores operated compared to the prior year. We operated 3,714 stores at December 31, 2023, compared to 2,338 stores at December 31, 2022.

Transaction Costs—This represents the costs that were incurred as part of the acquisition of Bargold.

Life Storage Merger Transition Costs— Represents the costs that were incurred as part of the Life Storage Merger primarily consisting of severance paid as part of employment agreements with certain employees and officers of Life Storage.

General and Administrative—General and administrative expenses primarily include all expenses not directly related to our stores, including corporate payroll, travel and professional fees. These expenses are recognized as incurred. Our overall expense has increased primarily as a result of our increased size through acquisitions, business combinations and growth through our joint venture partners and managed portfolio. No other material trends in specific travel or other expenses were observed.

Depreciation and Amortization—Depreciation and amortization expense increased primarily as a result of the acquisition of new stores. We acquired 757 wholly-owned stores in the Life Storage Merger and an additional 14 wholly-owned stores during the year ended December 31, 2023. We acquired 153 stores during the year ended December 31, 2022.

24

Other Income and Expenses

The following table presents information on other revenues and expenses for the years indicated:

For the Year Ended December 31,

Gain on Real Estate Transactions — During the year ended, December 31, 2022, we sold two stores. We recognized a total gain of $14,249 related to the sale of these assets.

Interest Expense—The increase in interest expense during the year ended December 31, 2023 was the result of higher overall debt and a higher average interest rate when compared to the same period in the prior year. Information on the total face value of debt and the average interest rate for the years ended December 31, 2023 and December 31, 2022 is set forth in the following table:

For the Year Ended December 31,

Average interest rate 4.6 % 4.1 %

Non-cash Interest Expense Related to Amortization of Discount on Life Storage Unsecured Senior Notes—Represents the amortization of the discount recorded to present the fair value of the Life Storage unsecured senior notes assumed as part of the Life Storage Merger.

Interest Income—Interest income represents interest earned on bridge loans and debt securities, income earned on notes receivable from common and preferred Operating Partnership unit holders and amounts earned on cash and cash equivalents deposited with financial institutions. The total principal balance of bridge loans receivable as of December 31, 2023 was $594,727, compared to $491,879 as of December 31, 2022. The increase in interest income during the year ended December 31, 2023 was primarily the result of the higher bridge loan balances along with higher interest rates.

Equity in Earnings and Dividend Income from Unconsolidated Real Estate Entities—Equity in earnings of unconsolidated real estate ventures represents the income earned through our ownership interests in unconsolidated real estate ventures. In joint ventures, we and our joint venture partners generally receive a preferred return on our invested capital. To the extent that cash or profits in excess of these preferred returns are generated, we receive a higher percentage of the excess cash or profits, as applicable. We added a total of 154 stores to new and existing joint ventures (145 stores from the Life Storage Merger) during the year ended December 31, 2023 resulting in higher earnings when compared to the prior year. Dividend income represents dividends from our investment in preferred stock of SmartStop Self Storage REIT, Inc. and Strategic Storage Trust VI, Inc.

Income Tax Expense—For the year ended December 31, 2023, the increase in income tax expense was the result of an increase in income earned by our TRS when compared to the same period in the prior year.

Comparison of the Year Ended December 31, 2022 to the Year Ended December 31, 2021

The results of operations for the years ended December 31, 2022 compared to December 31, 2021 was included in our Annual Report on Form 10-K for the year ended December 31, 2022 on page 21, under Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” which was filed with the SEC on February 28, 2022.

25

FUNDS FROM OPERATIONS

Funds from operations ("FFO") provides relevant and meaningful information about our operating performance that is necessary, along with net income and cash flows, for an understanding of our operating results. We believe FFO is a meaningful disclosure as a supplement to net earnings. Net earnings assume that the values of real estate assets diminish predictably over time as reflected through depreciation and amortization expenses. The values of real estate assets fluctuate due to market conditions and we believe FFO more accurately reflects the value of our real estate assets. FFO is defined by the National Association of Real Estate Investment Trusts, Inc. (“NAREIT”) as net income computed in accordance with U.S. generally accepted accounting principles (“GAAP”), excluding gains or losses on sales of operating stores and impairment write-downs of depreciable real estate assets, plus real estate related depreciation and amortization and after adjustments to record unconsolidated partnerships and joint ventures on the same basis. We believe that to further understand our performance, FFO should be considered along with the reported net income and cash flows in accordance with GAAP, as presented in the consolidated financial statements. FFO should not be considered a replacement of net income computed in accordance with GAAP.

The computation of FFO may not be comparable to FFO reported by other REITs or real estate companies that do not define the term in accordance with the current NAREIT definition or that interpret the current NAREIT definition differently. FFO does not represent cash generated from operating activities determined in accordance with GAAP, and should not be considered as an alternative to net income as an indication of our performance, as an alternative to net cash flow from operating activities as a measure of our liquidity, or as an indicator of our ability to make cash distributions.

The following table presents the calculation of FFO for the periods indicated:

For the Year Ended December 31,

Adjustments:

26

SAME-STORE RESULTS

Comparison of the Year Ended December 31, 2023 to the Year Ended December 31, 2022

Our same-store pool for the periods presented consists of 913 stores that are wholly-owned and operated and that were stabilized by the first day of the earliest calendar year presented. We consider a store to be stabilized once it has been open for three years or has sustained average square foot occupancy of 80% or more for one calendar year. We believe that by providing same-store results from a stabilized pool of stores, with accompanying operating metrics including, but not limited to: occupancy, rental revenue growth, operating expense growth, net operating income growth, etc., stockholders and potential investors are able to evaluate operating performance without the effects of non-stabilized occupancy levels, rent levels, expense levels, acquisitions or completed developments. Same-store results should not be used as a basis for future same-store performance or for the performance of our stores as a whole. The following table presents operating data for our same-store portfolio:

For the Year Ended December 31, Percent

Same-store square foot occupancy as of year end 93.0 % 94.1 %

Properties included in same-store 913 913

Same-store revenues for the year ended December 31, 2023 increased compared to the same periods in 2022 due to higher average rates to existing customers and higher other operating income partially offset by lower occupancy.

Same-store expenses increased for the year ended December 31, 2023 compared to the year ended 2022 due to increases in payroll, credit card processing fees, utilities, property taxes and insurance. The same-store expense growth rate for the year ended December 31, 2023 is amplified by negative expense growth in the 2022 comparable period.

27

The following table presents a reconciliation of same-store net operating income to net income as presented on our condensed consolidated statements of operations for the periods indicated:

For the Year Ended December 31,

Adjusted to exclude:

Gain on real estate transactions — (14,249)

Transaction costs — 1,548

Life Storage Merger transition costs 66,732 —

Management fees, other income and interest income (186,843) (153,326)

Comparison of the Year Ended December 31, 2022 to the Year Ended December 31, 2021

The same-store results for the years endedDecember 31, 2022 compared to December 31, 2021 was included in our Annual Report on Form 10-K for the year ended December 31, 2022 on page 20, under Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” which was filed with the SEC on February 28, 2023.

28

CASH FLOWS

Cash flows from operating activities increased as expected due to our continued growth in revenues and through the increase in the number of properties we own and operate. Cash flows used in investing activities relate primarily to our acquisitions and development of new stores, sales of stores, investments in unconsolidated real estate entities and notes receivable from bridge loans, and fluctuate depending on our actions in those areas. Cash flows from financing activities depend primarily on our debt and equity financing activities. A summary of cash flows along with significant components are as follows:

For the Year Ended December 31,

Significant components of net cash flow included:

Life Storage Merger, net of cash acquired (1,182,411) — —

Cash paid for business combination — (157,302) —

Proceeds from the sale of common stock, net of offering costs — — 273,189

Repurchase of common stock — (63,008) —

Proceeds from issuance of public bonds, net — — —

We believe that cash flows generated by operations, along with our existing cash and cash equivalents, the availability of funds under our existing lines of credit, and our access to capital markets will be sufficient to meet all of our reasonably anticipated cash needs during the next twelve months. These cash needs include operating expenses, monthly debt service payments, recurring capital expenditures, acquisitions, funding for the bridge loan program, building redevelopments and expansions, distributions to unit holders and dividends to stockholders necessary to maintain our REIT qualification.

We expect to generate positive cash flow from operations and we consider projected cash flows in our sources and uses of cash. These cash flows are principally derived from rents paid by our tenants. A significant deterioration in projected cash flows from operations could cause us to increase our reliance on available funds under our existing lines of credit, curtail planned capital expenditures, or seek other additional sources of financing.

29

LIQUIDITY AND CAPITAL RESOURCES

Financing Strategy

We will continue to employ leverage in our capital structure in amounts reviewed from time to time by our board of directors. Although our board of directors has not adopted a policy which limits the total amount of indebtedness that we may incur, we will consider a number of factors in evaluating our level of indebtedness from time to time, as well as the amount of such indebtedness that will be either fixed or variable rate. In making financing decisions, we will consider factors including but not limited to:

•the interest rate of the proposed financing;

•the extent to which the financing impacts flexibility in managing our stores;

•prepayment penalties and restrictions on refinancing;

•the purchase price of stores acquired with debt financing;

•long-term objectives with respect to the financing;

•target investment returns;

•the ability of particular stores, and our company as a whole, to generate cash flow sufficient to cover expected debt service payments;

•overall level of consolidated indebtedness;

•timing of debt maturities;

•provisions that require recourse and cross-collateralization; and

•corporate credit ratios including fixed charge coverage ratio and max secured/unsecured indebtedness.

Our indebtedness may be recourse, non-recourse, cross-collateralized, cross-defaulted, secured or unsecured. In addition, we may invest in stores subject to existing loans collateralized by mortgages or similar liens, or may refinance stores acquired on a leveraged basis. We may use the proceeds from any borrowings to refinance existing indebtedness, to refinance investments, including the redevelopment of existing stores, for general working capital or to purchase additional interests in partnerships or joint ventures or for other purposes when we believe it is advisable.

As of December 31, 2023, we had $99,062 available in cash and cash equivalents. Our cash and cash equivalents are held in accounts managed by third party financial institutions and consist of invested cash and cash in our operating accounts. During 2023 and 2022, we experienced no loss or lack of access to our cash or cash equivalents; however, there can be no assurance that access to our cash and cash equivalents will not be impacted by adverse conditions in the financial markets.

As of December 31, 2023, we had $11,346,105 face value of debt, resulting in a debt to total enterprise value ratio of 24.2%. As of December 31, 2022, we had $7,364,424 face value of debt, resulting in a debt to total enterprise value ratio of 25.8%. As of December 31, 2023, the ratio of total fixed-rate debt and other instruments to total debt was 73.4% (including $1,448,566 on which we have interest rate swaps that have been included as fixed-rate debt). As of December 31, 2022, the ratio of total fixed-rate debt and other instruments to total debt was 64.7% (including $1,837,714 on which we have interest rate swaps that have been included as fixed-rate debt). The weighted average interest rate of total debt at December 31, 2023 and 2022 was 4.6% and 4.1%, respectively. As of December 31, 2023, the weighted average interest rate for all fixed rate debt was 3.9%, and the weighted average interest rate on all variable rate debt was 6.6%. As of December 31, 2022, the weighted average interest rate for all fixed rate debt was 3.4%, and the weighted average interest rate on all variable rate debt was 5.5%.

In January 2021, we received a Baa2 rating from Moody's Investors Service and in July 2019, we obtained a BBB/Stable rating from S&P which was upgraded to BBB+/Stable in July 2023 in connection with the Life Storage Merger. We intend to manage our balance sheet to preserve such ratings. Certain of our real estate assets are pledged as collateral for our debt. We have a total of 1671 unencumbered stores as defined by our public bonds. Our unencumbered asset value is calculated as $31,869,102 and our total asset value is calculated as $37,529,884 according to the calculations as defined by our public bonds. We are subject to certain restrictive covenants relating to our outstanding debt. We were in compliance with all financial covenants at December 31, 2023.

We expect to fund our short-term and long-term liquidity requirements, including operating expenses, recurring capital expenditures, dividends to stockholders, distributions to holders of Operating Partnership units and interest on our outstanding indebtedness, out of our operating cash flow, cash on hand and borrowings under our revolving lines of credit. In addition, we are pursuing additional sources of financing based on anticipated funding needs.

Our liquidity needs consist primarily of operating expenses, monthly debt service payments, recurring capital expenditures, distributions to unit holders and dividends to stockholders necessary to maintain our REIT qualification. We may from time to time seek to repurchase our outstanding debt, shares of common stock or other securities in open market

30

purchases, privately negotiated transactions or otherwise. Such repurchases, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. In addition, we evaluate, on an ongoing basis, the merits of strategic acquisitions and other relationships, which may require us to raise additional funds. We may also use Operating Partnership units as currency to fund acquisitions from self-storage owners who desire tax-deferral in their exiting transactions.

CONTRACTUAL OBLIGATIONS

For more information on our contractual obligations related to real estate acquisitions, refer to our commitments and contingencies footnote in the notes to the consolidated financial statements in Item 8 of this Form 10-K.

SEASONALITY

The self-storage business has been subject to seasonal fluctuations. A greater portion of revenues and profits is typically realized from May through September. Historically, our highest level of occupancy has been at the end of July, while our lowest level of occupancy has been in late February and early March. Results for any quarter may not be indicative of the results that may be achieved for the full fiscal year.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Market Risk

Market risk refers to the risk of loss from adverse changes in market prices and interest rates. Our future income, cash flows and fair values of financial instruments are dependent upon prevailing market interest rates.

Interest Rate Risk

Interest rate risk is highly sensitive to many factors, including governmental monetary and tax policies, domestic and international economic and political considerations and other factors beyond our control.

As of December 31, 2023, we had approximately $11,346,105 in total face value debt, of which approximately $3,023,152 was subject to variable interest rates (excluding debt with interest rate swaps). If benchmark index rates were to increase or decrease by 100 basis points, the increase or decrease in interest expense on the variable rate debt would increase or decrease future earnings and cash flows by approximately $30,232 annually.

Interest rate risk amounts were determined by considering the impact of hypothetical interest rates on our financial instruments. These analyses do not consider the effect of any change in overall economic activity that could occur. Further, in the event of a change of that magnitude, we may take actions to further mitigate our exposure to the change. However, due to the uncertainty of the specific actions that would be taken and their possible effects, these analyses assume no changes in our financial structure.

Derivative Instruments

We use derivative instruments to help manage interest rate risk using designated hedge relationships. Interest rate swaps involve the exchange of fixed-rate and variable-rate interest payments between two parties based on a contractual underlying notional amount, but do not involve the exchange of the underlying notional amounts. See our Derivatives footnote in our Notes to consolidated financial statements in Item 8 for additional information about our use of derivative contracts.

31

Item 8. Financial Statements and Supplementary Data

EXTRA SPACE STORAGE INC.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

AND SCHEDULES

Report of Independent Registered Public Accounting Firm (PCAOB ID: 42) 33

Consolidated Balance Sheets as of December 31, 2023 and 2022 35

Notes to Consolidated Financial Statements 42

Schedule III - Real Estate and Accumulated Depreciation 74

All other schedules have been omitted since the required information is not present or not present in amounts sufficient to require submission of the schedule, or because the information required is included in the consolidated financial statements or notes thereto.

32

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Extra Space Storage Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Extra Space Storage Inc. (the Company) as of December 31, 2023 and 2022, the related consolidated statements of operations, comprehensive income, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2023, and the related notes and financial statement schedule listed in the Index at Item 8 (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 29, 2024 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. 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 included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the account or disclosure to which it relates.

33

Purchase price allocation

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2005.

Salt Lake City, Utah

February 29, 2024

34

Extra Space Storage Inc.

Consolidated Balance Sheets

(dollars in thousands, except share data)

Assets:

Real estate assets - operating lease right-of-use assets 227,241 221,725

Investments in unconsolidated real estate entities 1,071,617 582,412

Investments in debt securities and notes receivable 904,769 858,049

Liabilities, Noncontrolling Interests and Equity:

Cash distributions in unconsolidated real estate ventures 71,069 67,352

Commitments and contingencies

Noncontrolling Interests and Equity:

Extra Space Storage Inc. stockholders' equity:

Accumulated other comprehensive income 17,435 48,798

See accompanying notes

35

Extra Space Storage Inc.

Consolidated Statements of Operations

(dollars in thousands, except share data)

For the Year Ended December 31,

Revenues:

Expenses:

Transaction costs — 1,548 —

Life Storage Merger transition costs 66,732 — —

Earnings per common share

Weighted average number of shares

See accompanying notes

36

Extra Space Storage Inc.

Consolidated Statements of Comprehensive Income

(amounts in thousands)

For the Year Ended December 31,

Other comprehensive income:

See accompanying notes

37

Noncontrolling Interests Extra Space Storage Inc. Stockholders' Equity

Shares Par Value

Restricted stock grants cancelled — — — (12,808) — — — — —

Redemption of Operating Partnership units for cash — (173) — — — (615) — — (788)

Noncontrolling interest in consolidated joint venture — — (82) — — — — — (82)

38

Noncontrolling Interests Extra Space Storage Inc. Stockholders' Equity

Shares Par Value

Restricted stock grants cancelled — — — (10,614) — — — — —

Noncontrolling interest in consolidated joint venture — — 771 — — — — — 771

39

Noncontrolling Interests Extra Space Storage Inc. Stockholders' Equity

Shares Par Value

Restricted stock grants cancelled — — — (10,084) — — — — —

Redemption of Operating Partnership units for stock — (225) — 2,803 — 225 — — —

Redemption of Operating Partnership units for cash — (89) — — — (19) — — (108)

Noncontrolling interest in consolidated joint ventures — — 7,959 — — — — — 7,959

See accompanying notes

40

Extra Space Storage Inc.

Consolidated Statements of Cash Flows

(amounts in thousands)

For the Year Ended December 31,

Cash flows from operating activities:

Distributions from unconsolidated real estate ventures 20,060 13,162 7,035

Changes in operating assets and liabilities:

Cash flows from investing activities:

Life Storage Merger, net of cash acquired (1,182,411) — —

Cash paid for business combination — (157,302) —

Return of investment in unconsolidated real estate ventures — 342 31,534

Cash flows from financing activities:

Proceeds from the sale of common stock, net of offering costs — — 273,189

Net proceeds from exercise of stock options — — 4,572

Repurchase of common stock — (63,008) —

Redemption of Preferred OP units for cash (5,377) (4,500) —

Redemption of Operating Partnership units for cash (108) (4,617) (788)

Contributions from noncontrolling interests 74 — —

Distributions to minority investors (70) — —

Cash and equivalents, including restricted cash at the beginning of the period:

Cash and equivalents, including restricted cash at the end of the period:

Supplemental schedule of cash flow information

Supplemental schedule of noncash investing and financing activities:

Noncontrolling interests in Operating Partnership $ (116,336) $ — $ (6,373)

Common stock and paid-in capital 16,336 — 6,373

Redemption of Preferred Operating Partnership units for common stock

Preferred Operating Partnership units $ (33,604) $ — $ (2,834)

Issuance of OP and Preferred OP units in conjunction with business combination

Preferred OP units issued $ — $ (6,000) $ —

OP units issued — (16,000) —

Real estate assets - operating lease right-of-use assets $ 265 $ 16,298 $ 6,655

Acquisitions of real estate assets

Net liabilities assumed — — (20,028)

Investment in unconsolidated real estate ventures — 1,085 5,383

Life Storage Merger real estate assets

Real estate assets, net $ 13,575,501 $ — $ —

Value of common stock issued (11,353,338) — —

Unsecured senior notes (2,106,866) — —

Value of OP units issued (249,470) — —

Net liabilities assumed (191,077) — —

Investment in unconsolidated real estate ventures 325,250 — —

Accrued construction costs and capital expenditures

Establishment of finance lease assets and lease liabilities

Real estate assets, net $ — $ — $ 67,992

Other liabilities — — (67,992)

See accompanying notes

41

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Amounts in thousands, except store and share data, unless otherwise stated

1. DESCRIPTION OF BUSINESS

Extra Space Storage Inc. (the “Company”) is a fully integrated, self-administered and self-managed real estate investment trust (“REIT”), formed as a Maryland corporation on April 30, 2004, to own, operate, manage, acquire, develop and redevelop professionally managed self-storage properties located throughout the United States. The Company was formed to continue the business of Extra Space Storage LLC and its subsidiaries, which had engaged in the self-storage business since 1977. The Company’s interest in its stores is held through its operating partnership, Extra Space Storage LP (the “Operating Partnership”), which was formed on May 5, 2004. The Company’s primary assets are general partner and limited partner interests in the Operating Partnership. This structure is commonly referred to as an umbrella partnership REIT, or UPREIT.

The Company invests in stores by acquiring wholly-owned stores or by acquiring an equity interest in real estate entities. At December 31, 2023, the Company had direct and indirect equity interests in 2,377 storage facilities. In addition, the Company managed 1,337 stores for third parties bringing the total number of stores which it owns and/or manages to 3,714. These stores are located in 42 states and Washington, D.C. The Company also offers tenant reinsurance at its owned and managed stores that insures the value of goods in the storage units.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The consolidated financial statements are presented on the accrual basis of accounting in accordance with U.S. generally accepted accounting principles (“GAAP”) and include the accounts of the Company and its wholly- or majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Principles of Consolidation

The Company accounts for arrangements that are not controlled through voting or similar rights as variable interest entities (“VIEs”). An enterprise is required to consolidate a VIE if it is the primary beneficiary of the VIE. A VIE is created when (i) the equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support from other parties, or (ii) the entity’s equity holders as a group either: (a) lack the power, through voting or similar rights, to direct the activities of the entity that most significantly impact the entity’s economic performance, (b) are not obligated to absorb expected losses of the entity if they occur, or (c) do not have the right to receive expected residual returns of the entity if they occur. If an entity is deemed to be a VIE, the enterprise that is deemed to have a variable interest, or combination of variable interests, that provides the enterprise with a controlling financial interest in the VIE, is considered the primary beneficiary and must consolidate the VIE.

The Company has concluded that under certain circumstances when the Company enters into arrangements for the formation of joint ventures or when entering into a new bridge loan agreement, a VIE may be created under condition (i), (ii), (b) or (c) of the previous paragraph. For each VIE created, the Company has performed a qualitative analysis, including considering which party, if any, has the power to direct the activities most significant to the economic performance of each VIE and whether that party has the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. If the Company is determined to be the primary beneficiary of the VIE, the assets, liabilities and operations of the VIE are consolidated with the Company’s financial statements.

The Company determined that its operating partnership met the definition of a VIE and is consolidated. Additionally, as of December 31, 2023 the Company determined in addition to its operating partnership that it had one consolidated joint venture VIE, consisting of one store.

Substantially all of the assets and liabilities of the Company are related to the operating partnership VIE. The assets and credit of the VIE can only be used to satisfy the VIE's own contractual obligations, and the VIE's creditors have no recourse to the general credit of the Company.

The Company’s investments in real estate joint ventures, where the Company has significant influence, but not control, and joint ventures which are VIEs in which the Company is not the primary beneficiary, are recorded under the equity method of accounting on the accompanying consolidated financial statements.

42

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Fair Value Disclosures

Derivative financial instruments

Currently, the Company uses interest rate swaps to manage its interest rate risk. The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves. The fair values of interest rate swaps are determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of future interest rates (forward curves) derived from observable market interest rate forward curves.

The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings, thresholds, mutual puts, and guarantees. In conjunction with the Financial Accounting Standard Board’s fair value measurement guidance, the Company made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.

Although the Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of December 31, 2023, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy.

The table below presents the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2023, aggregated by the level in the fair value hierarchy within which those measurements fall.

Fair Value Measurements at Reporting Date Using

Other assets - Cash flow hedge swap agreements $ 26,183 $ — $ 26,183 $ —

Other liabilities - Cash flow hedge swap agreements $ 5,030 $ — $ 5,030 $ —

There were no transfers of assets and liabilities between Level 1 and Level 2 during the year ended December 31, 2023. The Company did not have any significant assets or liabilities that are re-measured on a recurring basis using significant unobservable inputs as of December 31, 2023 or 2022.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Long-lived assets held for use are evaluated for impairment when events or circumstances indicate there may be impairment. The Company reviews each store at least annually to determine if any such events or circumstances have occurred or exist. The Company focuses on stores where occupancy and/or rental income have decreased by a significant amount. For these stores, the Company determines whether the decrease is temporary or permanent, and whether the store will likely recover the lost occupancy and/or revenue in the short term. In addition, the Company reviews stores in the lease-up stage and compares actual operating results to original projections.

43

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

When the Company determines that an event that may indicate impairment has occurred, the Company compares the carrying value of the related long-lived assets to the undiscounted future net operating cash flows attributable to the assets. An impairment loss is recorded if the net carrying value of the assets exceeds the undiscounted future net operating cash flows attributable to the assets. The impairment loss recognized equals the excess of net carrying value over the related fair value of the assets.

When real estate assets are identified by management as held for sale, the Company discontinues depreciating the assets and estimates the fair value of the assets, net of selling costs. The Company compares the carrying value of the related long-lived assets to the undiscounted future net operating cash flows attributable to the assets (categorized within Level 3 of the fair value hierarchy). If the estimated fair value, net of selling costs, of the assets that have been identified as held for sale is less than the net carrying value of the assets, the Company would recognize a loss on the assets held for sale. The operations of assets held for sale or sold during the period are presented as part of normal operations for all periods presented.

The Company assesses annually whether there are any indicators that the value of the Company’s investments in unconsolidated real estate entities may be impaired and when events or circumstances indicate that there may be impairment. An investment is impaired if management’s estimate of the fair value of the investment is less than its carrying value. To the extent impairment has occurred, and is considered to be other than temporary, the loss is measured as the excess of the carrying amount of the investment over the fair value of the investment.

The Company evaluates goodwill for impairment at least annually and whenever events, circumstances, and other related factors indicate that fair value of the related reporting unit may be less than the carrying value. If the fair value of the reporting unit is determined to exceed the aggregate carrying amount, no impairment charge is recorded. Otherwise, an impairment charge is recorded to the extent the carrying amount of the goodwill exceeds the amount that would be allocated to goodwill if the reporting unit were acquired for estimated fair value. No impairments of goodwill were recorded for any period presented herein.

As of December 31, 2023 and 2022, the Company did not have any assets or liabilities measured at fair value on a nonrecurring basis.

Fair Value of Financial Instruments

The carrying values of cash and cash equivalents, restricted cash, receivables, other financial instruments included in other assets, accounts payable and accrued expenses, variable-rate notes payable, investments in debt securities and notes receivable, revolving lines of credit and other liabilities reflected in the consolidated balance sheets at December 31, 2023 and 2022, approximate fair value.

The fair values of the Company’s notes receivable and notes receivable from Preferred and Common Operating Partnership unit holders were based on the discounted estimated future cash flow of the notes (categorized within Level 3 of the fair value hierarchy); the discount rate used approximated the current market rate for loans with similar maturities and credit quality. The fair values of the Company’s fixed rate notes payable were estimated using the discounted estimated future cash payments to be made on such debt (categorized within Level 3 of the fair value hierarchy); the discount rates used approximated current market rates for loans, or groups of loans, with similar maturities and credit quality.

The fair values of the Company’s fixed-rate assets and liabilities were as follows for the periods indicated:

Fair Value Carrying Value Fair Value Carrying Value

Fixed rate notes receivable $ — $ — $ 5,191 $ 5,241

Real Estate Assets

Real estate assets are stated at cost, less accumulated depreciation. Direct and allowable internal costs associated with the development, construction, renovation, and improvement of real estate assets are capitalized. Interest, property taxes, and other

44

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

costs associated with development incurred during the construction period are capitalized. The construction period begins when expenditures for the real estate assets have been made and activities that are necessary to prepare the asset for its intended use are in progress. The construction period ends when the asset is substantially complete and ready for its intended use.

Expenditures for maintenance and repairs are charged to expense as incurred. Major replacements and betterments that improve or extend the life of the asset are capitalized and depreciated over their estimated useful lives. Depreciation is computed using the straight-line method over the estimated useful lives of the buildings and improvements, which are generally between five and 39 years.

The purchase of stores are considered asset acquisitions. As such, the purchase price is allocated to the real estate assets acquired based on their relative fair values, which are estimated using significant unobservable inputs. The value of the tangible assets, consisting of land and buildings, is determined as if vacant. Intangible assets, which represent the value of existing tenant relationships, are recorded at their relative fair values based on the avoided cost to replace the current leases. The Company measures the value of tenant relationships based on the rent lost due to the amount of time required to replace existing customers, which is based on the Company’s historical experience with turnover in its stores. Any debt assumed as part of the acquisition is recorded at fair value based on current interest rates compared to contractual rates. Acquisition-related transaction costs are capitalized as part of the purchase price.

Intangible lease rights represent: (1) purchase price amounts allocated to leases on three stores that cannot be classified as ground or building leases; these rights are amortized to expense over the life of the leases and (2) intangibles related to ground leases on nine stores where the leases were assumed by the Company at rates that were lower than the current market rates for similar leases. The values associated with these assumed leases were recorded as intangibles, which will be amortized over the lease terms.

Real Estate Sales

In general, sales of real estate and related profits/losses are recognized when all consideration has changed hands and risks and rewards of ownership have been transferred. Certain types of continuing involvement preclude sale treatment and related profit recognition; other forms of continuing involvement allow for sale recognition but require deferral of profit recognition.

Investments in Unconsolidated Real Estate Entities

Investments in unconsolidated real estate entities and Cash distributions in unconsolidated real estate ventures represent the Company's noncontrolling interest in real estate joint ventures that own stores and the Company's interest in preferred stock of SmartStop Self Storage REIT, Inc. ("SmartStop") and Strategic Storage Trust VI, Inc. ("Strategic Storage"), an affiliate of SmartStop. The Company’s investments in real estate joint ventures, where the Company has significant influence, but not control and joint ventures which are VIEs in which the Company is not the primary beneficiary, are recorded under the equity method of accounting in the accompanying consolidated financial statements.

Under the equity method, the Company’s investment in real estate ventures is stated at cost and adjusted for the Company’s share of net earnings or losses and reduced by distributions. Equity in earnings of real estate ventures is generally recognized based on the Company’s ownership interest in the earnings of each of the unconsolidated real estate ventures. For the purposes of presentation in the statement of cash flows, the Company follows the “nature of distribution” approach for classification of distributions from joint ventures. Under this approach, cash flows are classified on the basis of the nature of the activity or activities of the investee that generated the distribution as either a return on investment (classified as a cash inflow from operating activities) or a return of investment (classified as a cash inflow from investing activities).

The Company evaluated its investments in preferred stock of non-public real estate entities and determined it did not have significant influence over the entity, and the investment in preferred stock does not have a readily determinable fair value, therefore it has been recorded at the transaction price. The Company periodically evaluates the investment for impairment. No impairments were recorded during the year ended December 31, 2023.

45

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

Investments in Debt Securities and Notes Receivable

The Company accounts for its investment in debt securities and loans receivable at amortized cost. The Company recognizes interest income related to the debt securities and notes receivable using the effective interest method, with deferred fees and costs amortized over the lives of the related loans as yield adjustment.

Cash and Cash Equivalents

The Company’s cash is deposited with financial institutions located throughout the United States and at times may exceed federally insured limits. The Company considers all highly liquid debt instruments with a maturity date of three months or less to be cash equivalents.

Derivative Instruments and Hedging Activities

The Company records all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain of its risk, even though hedge accounting does not apply or the Company elects not to apply hedge accounting. The Company made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio.

Risk Management and Use of Financial Instruments

In the normal course of its ongoing business operations, the Company encounters economic risk. There are three main components of economic risk: interest rate risk, credit risk and market risk. The Company is subject to interest rate risk on its interest-bearing liabilities. Credit risk is the risk of inability or unwillingness of tenants to make contractually required payments. Market risk is the risk of declines in the value of stores due to changes in rental rates, interest rates or other market factors affecting the value of stores held by the Company. The Company has entered into interest rate swap agreements to manage a portion of its interest rate risk.

Redemption of Common Operating Partnership Units

The Company has the option to redeem common Operating Partnership Units in cash or shares of common stock. Redemption of common Operating Partnership units for shares of common stock, when redeemed under the original provisions of the Operating Partnership agreement, is accounted for by reclassifying the underlying net book value of the units from noncontrolling interest to the Company’s equity. Redemption of common Operating Partnership units for cash is accounted for by reducing the underlying net book value of the units from noncontrolling interest.

Revenue and Expense Recognition

Rental revenues are recognized as earned based upon amounts that are currently due from tenants. Leases are generally on month-to-month terms. Prepaid rents are recognized on a straight-line basis over the term of the leases. Promotional discounts are recognized as a reduction to rental income over the promotional period. Late charges, administrative fees and merchandise sales are recognized as income when earned.

The Company's management fees are earned subject to the terms of the related management services agreements ("MSAs"). These MSAs provide that the Company will perform management services, which include leasing and operating the property and providing accounting, marketing, banking, maintenance and other services. These services are provided in exchange for monthly management fees, which are based on a percentage of revenues collected from stores owned by third parties and unconsolidated joint ventures. MSAs generally have original terms from three to five years, after which

46

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

management services are provided on a month-to-month basis unless terminated. Management fees are due on the last day of each calendar month that management services are provided.

The Company accounts for the management services provided to a customer as a single performance obligation which are rendered over time each month. The total amount of consideration from the contract is variable as it is based on monthly revenues, which are influenced by multiple factors, some of which are outside the Company's control. Therefore, the Company recognizes the revenue at the end of each month once the uncertainty is resolved. Due to the standardized terms of the MSAs, the Company accounts for all MSAs in a similar, consistent manner. Therefore, no disaggregated information relating to MSAs is presented.

Property expenses, including utilities, property taxes, repairs and maintenance and other costs to manage the facilities are recognized as incurred. The Company accrues for property tax expense based upon invoice amounts and estimates. If these estimates are incorrect, the timing of expense recognition could be affected.

Tenant reinsurance premiums are recognized as revenue over the period of insurance coverage. Each tenant chooses the amount of insurance coverage they want through the tenant reinsurance program. Tenants can purchase policies in amounts up to 10,000 dollars of insurance coverage in exchange for a monthly fee. As of December 31, 2023, the total number of tenant insurance policies was 1.0 million, which was an aggregate coverage of approximately $3.0 billion. The Company’s exposure per claim is limited by the maximum amount of coverage chosen by each tenant.

Advertising Costs

The Company incurs advertising costs primarily attributable to digital and other advertising. These costs are expensed as incurred. The Company recognized $32,795, $19,285 and $18,793 in advertising expense for the years ended December 31, 2023, 2022 and 2021, respectively, which are included in property operating expenses on the Company’s consolidated statements of operations.

Income Taxes

The Company has elected to be treated as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the "Internal Revenue Code"). In order to maintain its qualification as a REIT, among other requirements, the Company is required to distribute at least 90% of its REIT taxable income to its stockholders and meet certain tests regarding the nature of its income and assets. As a REIT, the Company is not subject to U.S. federal income tax with respect to that portion of its income which meets certain criteria and is distributed annually to stockholders. The Company plans to continue to operate so that it meets the requirements for taxation as a REIT. Many of these requirements, however, are highly technical and complex. For any taxable year that the Company fails to qualify as a REIT and for which applicable statutory relief provisions did not apply, the Company would be subject to U.S. federal corporate income tax on all of its taxable income for at least that year and the ensuing four years. The Company is subject to certain state and local taxes. Provision for such taxes has been included in income tax expense on the Company’s consolidated statements of operations. For the year ended December 31, 2023, 0% (unaudited) of all distributions to stockholders qualified as a return of capital.

The Company owns and may acquire direct or indirect interests in entities that have elected or will elect to be taxed as REITs under the Internal Revenue Code (each, a “Subsidiary REIT ”). A Subsidiary REIT is subject to the various REIT qualification requirements and other limitations described herein that are applicable to the Company. If a Subsidiary REIT were to fail to qualify as a REIT, then (i) that Subsidiary REIT would become subject to U.S. federal income tax, (ii) shares in such Subsidiary REIT would cease to be qualifying assets for purposes of the asset tests applicable to REITs, and (iii) it is possible that the Company would fail certain of the asset tests applicable to REITs, in which event the Company would fail to qualify as a REIT unless it could avail itself of certain relief provisions.

The Company has elected to treat certain corporate subsidiaries, including Extra Space Management, Inc. (“ESMI”), as a taxable REIT subsidiary (“TRS”). In general, a TRS may perform additional services for tenants and may engage in any real estate or non-real estate related business. A TRS is subject to U.S. federal corporate income tax and may also be subject to state and local income taxes. ESM Reinsurance Limited, a wholly-owned subsidiary of ESMI, generates income from insurance premiums that are subject to U.S. federal corporate income tax and state insurance premiums tax.

47

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

Deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities. At December 31, 2023 and 2022, there were no material unrecognized tax benefits. Interest and penalties relating to uncertain tax positions will be recognized in income tax expense when incurred. As of December 31, 2023 and 2022, the Company had no interest or penalties related to uncertain tax provisions.

Stock-Based Compensation

The measurement and recognition of compensation expense for all share-based payment awards to employees and directors are based on estimated fair values. Awards granted are valued at fair value and any compensation expense is recognized over the service periods of each award.

Earnings Per Common Share

Basic earnings per common share is computed using the two-class method by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding during the period. All outstanding unvested restricted stock awards contain rights to non-forfeitable dividends and participate in undistributed earnings with common stockholders; accordingly, they are considered participating securities that are included in the two-class method. Diluted earnings per common share measures the performance of the Company over the reporting period while giving effect to all potential common shares that were dilutive and outstanding during the period. The denominator includes the weighted average number of basic shares and the number of additional common shares that would have been outstanding if the potential common shares that were dilutive had been issued, and is calculated using either the two-class, treasury stock or as if-converted method, whichever is most dilutive. Potential common shares are securities (such as options, convertible debt, Series A Participating Redeemable Preferred Units (“Series A Units”), Series B Redeemable Preferred Units (“Series B Units”), and Series D Redeemable Preferred Units (“Series D Units”) and together with the Series A Units and Series B Units, the (“Preferred OP Units") and common Operating Partnership units (“OP Units”)) that do not have a current right to participate in earnings of the Company but could do so in the future by virtue of their option, redemption or conversion right.

For the purposes of computing the diluted impact of the potential exchange of the Preferred OP Units for common shares upon redemption, where the Company has the option to redeem in cash or shares and where the Company has stated the intent and ability to settle the redemption in shares, the Company divided the total liquidation value of the Preferred OP Units by the average share price of $142.16 for the year ended December 31, 2023.

The following table presents the number of weighted OP Units and Preferred OP Units, and the potential common shares, that were excluded from the computation of earnings per share as their effect would have been anti-dilutive:

For the Year Ended December 31,

For the purposes of computing the diluted impact on earnings per share of the potential exchange of Series A Units for common shares upon redemption, where the Company has the option to redeem in cash or shares and where the Company has stated the positive intent and ability to settle at least $101,700 of the instrument in cash (or net settle a portion of the Series A Units against the related outstanding note receivable), only the amount of the instrument in excess of $101,700 is considered in the calculation of shares contingently issuable for the purposes of computing diluted earnings per share as allowed by ASC 260-10-45-46. Accordingly, the number of shares included in the computation for diluted earnings per share related to the Series A Units is equal to the number of Series A Units outstanding, with no additional shares included related to the $101,700 fixed amount.

48

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

The computation of earnings per share is as follows for the periods presented:

For the Year Ended December 31,

Weighted average common shares outstanding:

Earnings per common share

Recently Issued Accounting Standards

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting" (“ASU 2020-04”). ASU 2020-04 provides temporary optional guidance that provides transition relief for reference rate reform, including optional expedients and exceptions for applying GAAP to contract modifications, hedging relationships and other transactions that reference LIBOR or a reference rate that is expected to be discontinued as a result of reference rate reform if certain criteria are met. ASU 2020-04 is effective upon issuance, and the provisions generally can be applied prospectively as of January 1, 2020 through December 31, 2024. The Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. The Company also elected to apply additional expedients related to contract modifications, changes in critical terms, and updates to the designated hedged risks as qualifying changes are made to applicable debt and derivative contracts. Application of these expedients preserves the presentation of derivatives and debt contracts consistent with past presentation. In December 2022, the FASB issued ASU 2022-06, Deferral of the Sunset Date of Topic 848 (“ASU 2022-06”) which was issued to defer the sunset date of Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform to December 31, 2024. ASU 2022-06 is effective immediately for all companies. ASU 2022-06 had no impact on the Company’s consolidated financial statements for the year ended December 31, 2022.

49

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

3. REAL ESTATE ASSETS

The components of real estate assets are summarized as follows:

Less: accumulated depreciation and amortization (2,624,405) (2,138,524)

Real estate under development/redevelopment 118,745 52,311

Real estate assets held for sale included in real estate assets, net $ — $ —

The Company amortizes to expense intangible assets—tenant relationships on a straight-line basis over the average period that a tenant is expected to utilize the facility (currently estimated at 18 months). The Company amortizes to expense the intangible lease rights over the terms of the related leases. Amortization related to the tenant relationships and lease rights was $59,807, $13,981, and $4,778 for the years ended December 31, 2023, 2022 and 2021, respectively. The remaining balance of the unamortized lease rights will be amortized over the next five to 39 years. Accumulated amortization related to intangibles was 317,511 and 144,144 as of December 31, 2023 and 2022, respectively.

4. OTHER ASSETS

The components of other assets are summarized as follows:

Other intangible assets, net 66,332 —

Deferred line of credit financing costs, net 9,787 4,846

Depreciation of equipment and fixtures is computed on a straight-line basis over three to five years. The Company capitalizes certain costs during the application development stage when developing software for internal use. As of December 31, 2023 and 2022, unamortized software costs were $18,844 and $23,165. During the year ended December 31, 2023 and 2022, the Company recorded amortization expense of $5,377 and $5,147, respectively, relating to capitalized software costs.

50

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

5. PROPERTY ACQUISITIONS AND DISPOSITIONS

The Life Storage Merger

On July 20, 2023, the Company closed its merger with Life Storage (the "Life Storage Merger" or "Merger"), which included 757 wholly-owned stores and one consolidated joint venture store. Under the terms of the Life Storage Merger, Life Storage stockholders and holders of units of the Life Storage operating partnership received 0.895 of a share of common stock (or OP Unit, as applicable) of the Company for each issued and outstanding share (or operating partnership unit) of Life Storage they owned for total consideration of $11,602,808, based on the Company's closing share price on July 19, 2023. At closing, the Company retired $1,160,000 in balances on Life Storage's line of credit which included $375,000 that Life Storage used to pay off its private placement notes in connection with the closing of the Life Storage Merger. The Company also paid off $32,000 in secured loans. On July 25, 2023, the Company completed obligor exchange offers and consent solicitations (together the "Exchange Offers") related to Life Storage's various senior notes. Upon the closing of the Exchange Offers, a total of $2,351,100 of Life Storage's senior notes were exchanged for senior notes of the same tenor of Extra Space Storage L.P. The remaining Life Storage senior note balances which were not exchanged total $48,900 and no longer have any financial reporting requirements or covenants.

Consideration and Purchase Price Allocation

The Merger was accounted for as an asset acquisition in accordance with ASC Topic 805 which requires that the cost of an acquisition be allocated on a relative fair value basis to the assets acquired and the liabilities assumed. The following table summarizes the fair value of total consideration transferred in the Life Storage Merger:

Consideration Type July 20, 2023

Cash for payoff of Life Storage credit facility and debt 1,192,000

The following table summarizes the estimated fair values assigned to the assets acquired and liabilities assumed:

Equity investment in joint venture partnerships 325,250

Intangible assets - other 82,000

Accounts payable, accrued expenses and other liabilities (191,077)

Noncontrolling interests (4,338)

Fair value of net assets acquired $ 12,850,127

Fair Value Measurement

The estimated fair values of assets acquired and liabilities assumed were primarily based on information that was available as of the closing date of the Life Storage Merger. The methodology used to estimate the fair values to apply purchase accounting and the ongoing financial statement impact, if any, are summarized below:

•Real estate assets – Real estate assets acquired were recorded at fair value using standard valuation methodologies, including the cost and market approaches. The remaining useful lives for real estate assets, excluding land, were reset to 39 years. Tenant relationships for storage leases were recorded at fair value based on estimated costs the Company

51

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

avoided to replace them. Tenant relationships are amortized to expense over 18 months, which is based on the Company’s historical experience with turnover in its stores.

•Equity investment in joint venture partnerships - Equity investment in joint venture partnerships were recorded at fair value based on a direct capitalization of net operating income.

•Intangible assets - other – Customer relationships relating to tenant reinsurance contracts were recorded at fair value based on the income approach which estimates the potential revenue loss the Company avoided to replace them. These assets are amortized to expense over 36 months, which is based on the Company’s historical experience with average length of stay for tenants.

•Trade name – Trade names were recorded at fair value based on royalty payments avoided had the trade name been owned by a third party. This is determined using market royalty rates and a discounted cash flow analysis under the relief-from-royalty method. This method incorporates various assumptions, including projected revenue growth rates, the terminal growth rate, the royalty rate to be applied, and the discount rate utilized. The trade name is an indefinite lived asset and as such is not amortized.

•Unsecured senior notes – Unsecured senior notes were recorded at fair value using readily available market data. The below-market value of debt is recorded as a debt discount and reported as a reduction of the unsecured senior notes balance on the condensed consolidated balance sheets. The discount is amortized using effective interest method as an increase to interest expense over the remaining terms of the unsecured senior notes.

•Other assets and liabilities – the carrying values of cash, accounts receivable, prepaids and other assets, accounts payable, accrued expenses and other liabilities represented the fair values.

Trade name $ 50,000 $ — $ — $ —

Estimated Aggregate Amortization Expense

Trade name $ — $ — $ —

Store Acquisition

The following table shows the Company’s acquisitions of stores for the years ended December 31, 2023 and 2022. The table excludes purchases of raw land and improvements made to existing assets.

Consideration Paid Total

52

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

On September 15, 2022, the Company completed the acquisition of multiple entities doing business as Storage Express for a purchase price of $590.0 million. A portion of the consideration paid was in the form of the issuance of 619,294 OP units (a total value of $125.0 million) and the remainder in cash. The portfolio included 106 operating stores and eight parcels of land for future development, all located in Illinois, Indiana, Kentucky and Ohio. This acquisition did not meet the definition of a business under ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business" and was therefore recorded as an asset acquisition.

Other Investments

On June 1, 2022, the Company completed the acquisition of Bargold Storage Systems, LLC ("Bargold") for a purchase price of approximately $179.3 million. Bargold leases space in apartment buildings, primarily in New York City and its boroughs, builds out the space as storage units, and subleases the units to tenants. As of June 1, 2022, Bargold had approximately 17,000 storage units with an approximate occupancy of 97%. This acquisition is considered a business combination under ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business."

The following table summarizes the total consideration transferred to acquire Bargold:

Total cash paid by the company $ 157,302

Fair value of Series D Units issued 16,000

Fair value of OP Units issued 6,000

Total consideration transferred $ 179,302

As part of this acquisition, we recorded an expense of $1,465 related to transaction costs.

The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the acquisition date:

Cash and cash equivalents $ 175

Developed technology 500

Customer relationships 1,870

Other assets 125

Accounts payables and accrued liabilities assumed (1,090)

Nets asset acquired 8,491

Total assets acquired $ 179,302

The following table summarizes the revenues and earnings related to Bargold since the acquisition date of June 1, 2022, which are included in the Company's consolidated statement of operations for the year ended December 31, 2022:

Total revenues $ 9,374

Net income from operations $ 1,718

Pro Forma Information

53

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

As noted above, during the year ended December 31, 2022, the Company acquired Bargold. The following pro forma financial information is based on the combined historical financial statements of the Company and Bargold, however, only includes revenue and presents the Company's results as if the acquisition had occurred on January 1, 2021. Net income was excluded as it was impracticable to report expenses due to the lack of historical accrual basis accounting.

For the Year Ended December 31, 2022 For the Year Ended December 31, 2021

Pro Forma Pro Forma

Store Dispositions

The Company disposed of one store on May 18, 2022 and one on June 21, 2022, for a total cash consideration of approximately $38.7 million, resulting in a gain of approximately $14.2 million. Both had been classified as held for sale.

On December 16, 2021 the Company sold 16 stores that had been classified as held for sale for total cash consideration of $200,292. The Company recorded a gain of $73,854.

On March 1, 2021 the Company sold 16 stores that had been classified as held for sale to a newly established unconsolidated joint venture. The Company received $132,759 and maintained a 55% interest in the new joint venture valued at $33,878. The Company recognized a gain of $63,477 related to the sale of these properties.

6. INVESTMENTS IN UNCONSOLIDATED REAL ESTATE ENTITIES

Investments in unconsolidated real estate entities and Cash distributions in unconsolidated real estate ventures represent the Company's interest in preferred stock of SmartStop and Strategic Storage, an affiliate of SmartStop, and the Company's noncontrolling interest in real estate joint ventures that own stores. The Company accounts for its investments in SmartStop and Strategic Storage preferred stock, which do not have a readily determinable fair value, at the transaction price less impairment, if any. The Company accounts for its investments in joint ventures using the equity method of accounting. The Company initially records these investments at cost and subsequently adjusts for cash contributions, distributions and net equity in income or loss, which is allocated in accordance with the provisions of the applicable partnership or joint venture agreement.

In these joint ventures, the Company and the joint venture partner generally receive a preferred return on their invested capital. To the extent that cash or profits in excess of these preferred returns are generated through operations or capital transactions, the Company would receive a higher percentage of the excess cash or profits, as applicable, than its equity interest.

The Company separately reports investments with net equity less than zero in Cash distributions in unconsolidated real estate ventures in the consolidated balance sheets. The net equity of certain joint ventures is less than zero because distributions have exceeded the Company's investment in and share of income from these joint ventures. This is generally the result of financing distributions, capital events or operating distributions that are usually greater than net income, as net income includes non-cash charges for depreciation and amortization while distributions do not.

54

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

Net Investments in unconsolidated real estate entities and Cash distributions in unconsolidated real estate ventures consist of the following:

Number of Stores Equity Ownership % Excess Profit % (1) December 31,

Strategic Storage Trust VI, Inc. Preferred Stock (3) n/a n/a n/a 150,000 —

(1)Includes pro-rata equity ownership share and promoted interest.

(2)In October 2019, the Company invested $200,000 in shares of convertible preferred stock of SmartStop with a dividend rate of 6.25% per annum, subject to increase after five years. The preferred shares are generally not redeemable for five years, except in the case of a change of control or initial listing of SmartStop. Dividend income from this investment is included on the equity in earnings and dividend income from unconsolidated real estate entities line on the Company's condensed consolidated statements of operations.

(3)In May 2023, the Company invested $150,000 in shares of convertible preferred stock of Strategic Storage with a dividend rate of 8.35% per annum, subject to increase after five years. The preferred shares are generally not redeemable for three years, except in the case of a change of control or initial listing of Strategic Storage. Dividend income from this investment is included on the equity in earnings and dividend income from unconsolidated real estate entities line on the Company's condensed consolidated statements of operations.

In June 2021, the Company sold its interest in two unconsolidated joint ventures to its joint venture partner. The Company received proceeds of $1,888 in cash, and recorded a gain of $525 which is included in Equity in earnings of unconsolidated real estate ventures - gain on sale of real estate assets and purchase of joint venture partner's interest in the Company's condensed consolidated statements of operations. The Company also purchased its joint venture partners' interests in two unconsolidated joint ventures.

Also in June 2021, the WICNN JV LLC and GFN JV, LLC joint ventures sold all 17 of the stores owned by the joint ventures to a third party. Subsequent to the sales, these joint ventures were dissolved. As a result of these transactions, the Company recorded a gain of $5,739, which is included in Equity in earnings of unconsolidated real estate ventures - gain on sale of real estate assets and purchase of joint venture partner's interest in the Company's consolidated statements of operations.

In accordance with ASC 810, the Company reviews all of its joint venture relationships annually to ensure that there are no entities that require consolidation. As of December 31, 2023, there were no previously unconsolidated entities that were required to be consolidated as a result of this review.

55

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

The Company entered into 17 new unconsolidated real estate joint ventures (including 16 from the Life Storage Merger), which added a total of 146 stores and a total investment of $305,921 to the Company's portfolio during the year ended December 31, 2023. Additionally, the Company's existing joint ventures added nine stores for a total investment of $27,583 during the year ended December 31, 2023. The Company accounts for its investment in these ventures under the equity method of accounting.

Equity in earnings and dividend income from unconsolidated real estate entities consists of the following:

For the Year Ended December 31,

Equity in earnings of PRISA Self Storage LLC $ 3,320 $ 3,272 $ 2,719

Equity in earnings of HF1 Sovran HHF Storage Holdings LLC (1) 1,553 — —

Equity in earnings of Storage Portfolio II JV LLC 3,094 3,398 1,802

Equity in earnings of Storage Portfolio IV JV LLC 1,319 917 112

Equity in earnings of Storage Portfolio I LLC 5,182 4,684 2,833

Equity in earnings of PR II EXR JV LLC 2,227 1,229 (8)

Equity in earnings of HF2 Sovran HHF Storage Holdings II LLC (1) 691 — —

Equity in earnings of HF5 Life Storage-HIERS Storage LLC (1) 377 — —

Equity in earnings of HF6 191 V Life Storage Holdings LLC (1) (735) — —

Equity in earnings of VRS Self Storage, LLC 5,253 5,401 4,352

Equity in earnings of HF10 Life Storage HHF Wasatch Holdings LLC (1) 40 — —

Equity in earnings of other minority owned stores (1) 7,740 7,265 6,774

Dividend income from Strategic Storage preferred stock 8,401 — —

(1)The earnings of the 16 joint ventures from the Life Storage Merger are from the close of acquisition on July 20, 2023.

Equity in earnings of certain of our joint ventures includes the amortization of the Company’s excess purchase price of $60,253 of these equity investments over its original basis. The excess basis is amortized over 39 years.

The Company provides management services to joint ventures for a fee. Management fee revenues for affiliated real estate joint ventures for the years ended December 31, 2023, 2022 and 2021 were $31,755, $24,389 and $17,619, respectively.

7. INVESTMENTS IN DEBT SECURITIES AND NOTES RECEIVABLE

Investments in debt securities and notes receivable consists of the Company's investment in mandatorily redeemable preferred stock of Jernigan Capital, Inc. ("JCAP") in connection with JCAP's acquisition by affiliates of NexPoint Advisors, L.P. ("NexPoint") and receivables due to the Company under its bridge loan program. Information about these balances is as follows:

In November 2020, the Company invested $300,000 in the preferred stock of JCAP in connection with the acquisition of JCAP by affiliates of NexPoint. This investment consisted of 200,000 Series A Preferred Shares valued at a total of $200,000, and 100,000 Series B Preferred Shares valued at a total of $100,000. In December 2022, the Company completed a modification with Nexpoint Storage Partners (as successor in interest to JCAP) that exchanged the Series A and B Preferred Shares for 300,000 Series D Preferred Shares, valued at a total of $300,000. The JCAP Series D preferred stock is mandatorily

56

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

redeemable after six years from the modification in December 2022, with twoone-year extension options. NexPoint may redeem the Preferred Shares at any time, subject to certain prepayment penalties. The Company accounts for the JCAP preferred stock as a held to maturity debt security at amortized cost and evaluates whether the fair value is below the amortized cost basis at each reporting period. The Series D Preferred Shares have initial dividend rates of 8.5%. If the investment is not retired after six years, the preferred dividends increase annually.

In July 2020, the Company purchased a senior mezzanine note receivable with a principal amount of $103,000. The note receivable bore interest at 5.5%, with a maturity in December 2023 and was collateralized through an equity interest in which it or its subsidiaries wholly own 62 storage facilities. The Company paid cash of $101,142 for the note receivable and accounted for the discount at amortized cost. The discount was being amortized over the term of the note receivable. In February 2022, a junior mezzanine lender exercised its right to buy the Company’s position for the full principal balance plus interest due, as a result of which the Company sold this note for a total of $103,315 in cash. The remaining unamortized discount was recognized in that quarter as interest income.

The Company provides bridge loan financing to third-party self-storage operators. These notes receivable consist of mortgage loans receivable, which are collateralized by self-storage properties, and unsecured mezzanine loans receivable. As of December 31, 2023, 70% of the notes held are mortgage receivables. The Company intends to sell a portion of the mortgage receivables. These notes receivable typically have a term of three years with twoone-year extensions, and have variable interest rates. During the year ended December 31, 2023, the Company sold a total principal amount of $167,495 of its mortgage bridge loans receivable to third parties for a total of $167,495 in cash, closed on $283,039 in initial loan draws, and recorded $27,366 of draws from interest holdbacks.

The bridge loans typically have a loan to value ratio between 70% and 80%. None of the debt securities or notes receivable are in past-due or nonaccrual status and the allowance for potential credit losses is immaterial.

8. DEBT

The components of term debt are summarized as follows:

Less: Discount on unsecured senior notes (3) (274,350) —

Less: Unamortized debt issuance costs (55,007) (32,962)

(2) Basis rates include Term SOFR and Daily Simple SOFR

The following table summarizes the scheduled maturities of term debt, excluding available extensions, at December 31, 2023:

57

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

On June 22, 2023, the Company entered into the Third Amended and Restated Credit Agreement (the "Credit Agreement") which increased the commitment of the revolving credit facility to $1,940,000, and later to $2,000,000 with an Increasing Lender Supplement entered into in August 2023, and extended its maturity to June 2027. In connection with entering into the Credit Agreement, the Company paid off Tranche 5 and added the Tranche 8 term loan, maturing June 2024, which allowed the Company to draw up to $1,000,000 in connection with the Life Storage Merger. Tranche 8 was fully drawn on July 20, 2023, in connection with the closing of the Life Storage Merger, paid down to $400,000 in December 2023, and fully paid off in January 2024.

Pursuant to the terms of the Credit Agreement, the Company may request an extension of the term of the revolving credit facility for up to two additional periods of six months each, after satisfying certain conditions.

As of December 31, 2023, amounts outstanding under the revolving credit facility bore interest at floating rates, at the Company’s option, equal to either (i) Adjusted Term or Daily Simple SOFR plus the applicable margin or (ii) the applicable base rate which is the applicable margin plus the highest of (a) 0.0%, (b) the federal funds rate plus 0.50%, (c) U.S. Bank’s prime rate or (d) the SOFR rate plus 1.00%. Per the Credit Agreement, the applicable SOFR rate margin and applicable base rate margin are based on the Company’s achieved debt rating, with the SOFR rate margin ranging from 0.7% to 2.2% per annum and the applicable base rate margin ranging from 0.00% to 1.20% per annum.

The Credit Agreement is guaranteed by the Company and is not secured by any assets of the Company. The Company's unsecured debt is subject to certain financial covenants. As of December 31, 2023, the Company was in compliance with all of its financial covenants.

All of the Company’s lines of credit are guaranteed by the Company. The following table presents information on the Company’s lines of credit, the proceeds of which are used to repay debt and for general corporate purposes, for the periods indicated:

(1) Daily Simple SOFR

As of December 31, 2023, the Company’s percentage of fixed-rate debt to total debt was 73.4%. The weighted average interest rates of the Company’s fixed and variable-rate debt were 3.9% and 6.6%, respectively. The combined weighted average interest rate was 4.6%.

58

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

9. DERIVATIVES

The Company is exposed to certain risk arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk primarily by managing the amount, sources and duration of its debt funding and the use of derivative financial instruments. Specifically, the Company enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company’s derivative financial instruments are used to manage differences in the amount, timing and duration of the Company’s known or expected cash payments principally related to the Company’s borrowings.

Cash Flow Hedges of Interest Rate Risk

The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income (“OCI”) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. A portion of these changes is excluded from accumulated other comprehensive income as it is allocated to noncontrolling interests. During the years ended December 31, 2023, 2022 and 2021, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt. During 2024, the Company estimates that $19,010 will be reclassified as a decrease to interest expense.

The following table summarizes the terms of the Company’s 15 active and four forward-starting derivative financial instruments, which have a total combined current notional amount of $1,448,566 as of December 31, 2023:

Hedge Product Range of Notional Amounts Strike Effective Dates Maturity Dates

Fair Values of Derivative Instruments

The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the consolidated balance sheets:

Asset / Liability Derivatives

Effect of Derivative Instruments

The tables below present the effect of the Company’s derivative financial instruments on the consolidated statements of operations for the periods presented. No tax effect has been presented as the derivative instruments are held by the Company:

59

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

Credit-Risk-Related Contingent Features

The Company has agreements with some of its derivative counterparties that contain provisions pursuant to which, the Company could be declared in default of its derivative obligations if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender.

The Company also has an agreement with some of its derivative counterparties that incorporates the loan covenant provisions of the Company’s indebtedness with a lender affiliate of the derivative counterparty. Failure to comply with the loan covenant provisions would result in the Company being in default on any derivative instrument obligations covered by the agreement.

As of December 31, 2023, the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $5,082. As of December 31, 2023, the Company had not posted any collateral related to these agreements. If the Company had breached any of these provisions as of December 31, 2023, it could have been required to cash settle its obligations under these agreements at their termination value of $5,082.

10. STOCKHOLDERS’ EQUITY

The Company’s charter provides that it can issue up to 500,000,000 shares of common stock, $0.01 par value per share and 50,000,000 shares of preferred stock, $0.01 par value per share. As of December 31, 2023, 211,278,803 shares of common stock were issued and outstanding, and no shares of preferred stock were issued or outstanding.

All holders of the Company's common stock are entitled to receive dividends and to one vote on all matters submitted to a vote of stockholders. The transfer agent and registrar for the Company’s common stock is American Stock Transfer & Trust Company.

During the year ended December 31, 2023, the Company sold no shares of common stock.

On July 20, 2023, the Company issued 76,217,359 shares of its common stock for a total value of $11,353,338. This was based on an exchange ratio of 0.895 per share conversion of Life Storage common stock at the Company's closing share price on July 19, 2023 of $148.96 as part of the Life Storage Merger.

On January 7, 2022, the Company issued 186,766 shares of its common stock to acquire two stores for $40,965.

On August 9, 2021, the Company filed its $800,000 "at the market" equity program with the Securities and Exchange Commission using a shelf registration statement on Form S-3, and entered into separate equity distribution agreements with ten sales agents. No shares have been sold under the current "at the market" equity program. From January 1, 2021, through August 8, 2021, the Company sold 585,685 shares of common stock under its prior "at the market" equity program at an average sales price of $115.90 per share resulting in net proceeds of 66,617.

On March 23, 2021, the Company sold 1,600,000 shares of its common stock in a registered offering structured as a bought deal at a price of $129.13 per share resulting in net proceeds of 206,572.

On November 13, 2023, the Company's board of directors authorized a share repurchase program allowing for the repurchase of shares with an aggregate value up to $500,000. During the year ended December 31, 2023, no shares were repurchased. As of December 31, 2023, the Company had remaining authorization to repurchase shares with an aggregate value up to $500,000.

60

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

11. NONCONTROLLING INTEREST REPRESENTED BY PREFERRED OPERATING PARTNERSHIP UNITS

Classification of Noncontrolling Interests

GAAP requires a company to present ownership interests in subsidiaries held by parties other than the company in the consolidated financial statements within the equity section, but separate from the company’s equity. It also requires the amount of consolidated net income attributable to the parent and to the noncontrolling interest to be clearly identified and presented on the face of the consolidated statement of operations and requires changes in ownership interest to be accounted for similarly as equity transactions. If noncontrolling interests are determined to be redeemable, they are to be carried at their redemption value as of the balance sheet date and reported as temporary equity.

The Company has evaluated the terms of the Operating Partnership’s preferred units and classifies the noncontrolling interest represented by such preferred units as stockholders’ equity in the accompanying consolidated balance sheets. The Company will periodically evaluate individual noncontrolling interests for the ability to continue to recognize the noncontrolling amount as permanent equity in the consolidated balance sheets. Any noncontrolling interests that fail to qualify as permanent equity will be reclassified as temporary equity and adjusted to the greater of (1) the carrying amount, or (2) its redemption value as of the end of the period in which the determination is made.

At December 31, 2023 and 2022, the noncontrolling interests represented by the Preferred OP Units qualified for classification as permanent equity on the Company's consolidated balance sheets. The partnership agreement of the Operating Partnership (as amended, the "Partnership Agreement") provides for the designation and issuance of the OP Units. As of December 31, 2023 and 2022, noncontrolling interests in Preferred OP Units were presented net of notes receivable from Preferred Operating Partnership unit holders of $100,000 as of December 31, 2023 and 2022, respectively, as more fully described below. The balances for each of the specific preferred OP units as presented in the Statement of Noncontrolling Interests and Equity as of the periods indicated is as follows:

Series A Units $ — $ 16,498

Series A Participating Redeemable Preferred Units

The Partnership Agreement provides for the designation and issuance of the Series A Units. The Series A Units have priority over all other partnership interests of the Operating Partnership with respect to distributions and liquidation.

The Series A Units were issued in June 2007. Series A Units in the amount of $101,700 bear a fixed priority return of 2.3%, and originally had a fixed liquidation value of $115,000. The remaining balance participates in distributions with, and has a liquidation value equal to, that of the common OP Units. The Series A Units are redeemable at the option of the holder, which redemption obligation may be satisfied, at the Company’s option, in cash or shares of its common stock. As a result of the redemption of 114,500 Series A Units in October 2014, the remaining fixed liquidation value was reduced to $101,700 which represents 875,480 Series A Units.

On June 25, 2007, the Operating Partnership loaned the holders of the Series A Units $100,000. The note receivable bears interest at 2.1%. The loan is secured by the borrower’s Series A Units. No future redemption of Series A Units can be made unless the loan secured by the Series A Units is also repaid. The Series A Units are shown on the balance sheet net of the $100,000 loan because the borrower under the loan is also the holder of the Series A Units.

On January 25, 2023, the redemption obligation for all outstanding Series A Units was satisfied in $5,000 cash and 851,698 shares of its common stock, which was net of the noncash settlement of the $100,000 loan. As a

result of this redemption, no Series A Units were outstanding as of December 31, 2023.

61

EXTRA SPACE STORAGE INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

Amounts in thousands, except store and share data, unless otherwise stated

Series B Redeemable Preferred Units

The Partnership Agreement provides for the designation and issuance of the Series B Units. The Series B Units rank junior to the Series A Units, on parity with the Series C Units (defined below) and Series D Units, and senior to all other partnership interests of the Operating Partnership with respect to distributions and liquidation.

The Series B Units were issued in 2013 and 2014, have been redeemed at various times, and have a liquidation value of $25.00 per unit for a current fixed liquidation value of $33,567 which represents 1,342,727 Series B Units outstanding at December 31, 2023. Holders of the Series B Units receive distributions at an annual rate of 6.0%. These distributions are cumulative. The Series B Units became redeemable at the option of the holder on the first anniversary of the date of issuance, which redemption obligations may be satisfied at the Company’s option in cash or shares of its common stock.

Series C Convertible Redeemable Preferred Units

The Partnership Agreement provides for the designation and issuance of the Series C Units. The Series C Units ranked

junior to the Series A Units, on parity with the Series B Units and Series D Units, and senior to all other partnership interests of

the Operating Partnership with respect to distributions and liquidation. As of December 31, 2023 and December 31, 2022, there were no outstanding Series C Units.

Series D Redeemable Preferred Units

The Partnership Agreement provides for the designation and issuance of the Series D Units. The Series D Units rank junior to the Series A Units, on parity with the Series B Units and Series C Units, and senior to all other partnership interest of the Operating Partnership with respect to distributions and liquidation.

The Series D Units have a liquidation value of $25.00 per unit, for a current fixed liquidation value of $188,793 which represents 7,551,735 Series D Units outstanding at December 31, 2023. Holders of the Series D Units receive distributions at an annual rate between 3.0% and 5.0%. These distributions are cumulative. The Series D Units become redeemable at the option of the holder on the first anniversary of the date of issuance, which redemption obligation may be satisfied at the Company’s option in cash or shares of its common stock. In addition, certain of the Series D Units are exchangeable for common OP Units until the tenth anniversary of the date of issuance, with the number of common OP Units to be issued equal to $25.00 per Series D Unit, divided by the value of a share of common stock as of the exchange date.

In January 2023, 890,594 Series D units were redeemed for 154,307 shares of common stock. In November 2023, 15,093 Series D units were redeemed for cash of $377.

The Series D Units have been issued at various times from 2014 to 2022. On June 1, 2022, the Operating Partnership

issued a total of 240,000 Series D Units valued at $6,000 in connection with the acquisition of Bargold.

62

EXTRA SPACE STORAGE INC.