CoverageForm 410-K10-Q8-K13D13G13F

NSA National Storage Affiliates Trust - 8-K

Accession
0001628280-25-048227
2.029.01

Item 2.02 - Results of Operations and Financial Condition

Earnings press release attached as Exhibit 99.1.

ITEM 2.02.         Results of Operations and Financial Condition.

On November 3, 2025 , National Storage Affiliates Trust (the "Company") issued an earnings release and supplemental schedules announcing its financial results for the quarter ended September 30, 2025. A copy of the earnings release and supplemental schedules are attached hereto as Exhibit 99.1 and is incorporated by reference herein. The Company will hold its third quarter 2025 earnings conference call on Tuesday, November 4, 2025 at 1:00 p.m. Eastern Time. You may join the conference call through an Internet webcast accessed through the Company's website at www.nsastorage.com. Alternatively, you may join the conference call by telephone by dialing 877-407-9711, or 412-902-1014 for international callers. If you wish to participate, please call approximately five minutes before the conference call is scheduled to begin.

If you are unable to join the live conference call, you may access the webcast replay for 30 days through the Company's website at www.nsastorage.com. The full text of the earnings release and supplemental schedules are also available through the Company's website at www.nsastorage.com. The information contained on the Company's website is not incorporated by reference herein.

Exhibit 99.1 - press release (12,829 words)

EX-99.1
2
ex991-q32025erss.htm
EX-99.1

Table of Contents

Page

1

Earnings Release

7

Consolidated Statements of Operations

8

Consolidated Balance Sheets

9

Schedule 1 - Funds From Operations and Core Funds From Operations

11

Schedule 2 - Other Non-GAAP Financial Measurements

12

Schedule 3 - Portfolio Summary

14

Schedule 4 - Debt and Equity Capitalization

16

Schedule 5 - Summarized Information for Unconsolidated Real Estate Ventures

17

Schedule 6 - Same Store Performance Summary By MSA

21

Schedule 7 - Same Store Operating Data - Trailing Five Quarters

22

Schedule 8 - Reconciliation of Same Store Data and Net Operating Income to Net Income

23

Schedule 9 - Selected Financial Information

24

Glossary

November 3, 2025

National Storage Affiliates Trust Reports Third Quarter 2025 Results

GREENWOOD VILLAGE, Colo. - (BUSINESS WIRE) - National Storage Affiliates Trust ("NSA" or the "Company") (NYSE: NSA) today reported the Company’s third quarter 2025 results.

Third Quarter 2025 Highlights

• Reported net income of $29.0 million for the third quarter of 2025, a decrease of 2.5% compared to the third quarter of 2024. Reported diluted earnings per share of $0.17 for the third quarter of 2025 compared to $0.18 for the third quarter of 2024.

• Reported core funds from operations ("Core FFO") of $76.5 million, or $0.57 per share for the third quarter of 2025, a decrease of 8.1% per share compared to the third quarter of 2024.

• Reported a decrease in same store net operating income ("NOI") of 5.7% for the third quarter of 2025 compared to the same period in 2024, driven by a 2.6% decrease in same store total revenues and a 4.9% increase in same store property operating expenses.

• Reported same store period-end occupancy of 84.5% as of September 30, 2025, a decrease of 140 basis points compared to September 30, 2024.

• Acquisition of two self storage properties for approximately $32.0 million by one of NSA's unconsolidated real estate ventures during the third quarter of 2025.

• Completed the rebranding of all NSA-owned Moove In branded stores to iStorage, reducing the number of NSA operated brands to six.

Highlights Subsequent to Quarter-End

• As previously announced, entered into an agreement to form a new joint venture (the "IRE Joint Venture") between a subsidiary of NSA (the "NSA Member") and an affiliate of Investment Real Estate Management, LLC (the "IRE Member"), with the NSA Member committing to provide 75% of the equity and the IRE Member committing to provide 25% of the equity. NSA's committed capital will be in the form of preferred equity, with a 10% preferred return per annum as well as an opportunity for additional returns, which NSA expects to realize as the joint venture exits its investments in future years. An affiliate of the IRE Member will serve as the manager of the IRE Joint Venture.

David Cramer, President and Chief Executive Officer, commented, "During the third quarter, the majority of our markets showed sequential improvement in same store revenue growth, which supports our view that fundamentals have found a bottom and are beginning to trend upward."

Mr. Cramer further commented, “While the current operating environment remains competitive, the backdrop for self storage going forward is the best that we have seen in a number of years. Given the potential positive impacts on the housing market from expected interest rates cuts and a more favorable supply environment, we expect to see an improvement in self storage fundamentals supported by an improving supply/demand balance in 2026 and beyond. Our focus over the past several quarters has been to best position NSA to take advantage of this expected upturn through capital recycling and improved operational efficiency. We are ready to execute in this environment and excited about the opportunities ahead.”

1

Financial Results

($ in thousands, except per share and unit data)

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

Change

2025

2024

Change

Net income

$

29,016

$

29,771

(2.5)

%

$

79,493

$

157,139

(49.4)

%

Funds From Operations ("FFO") (1)

$

75,070

$

82,365

(8.9)

%

$

218,389

$

224,377

(2.7)

%

Add acquisition costs

302

287

5.2

%

1,162

1,274

(8.8)

%

Add integration and executive severance costs (2)

1,137

907

25.4

%

4,762

1,534

210.4

%

Add loss on early extinguishment of debt

—

323

—

%

—

323

—

%

Core FFO (1)

$

76,509

$

83,882

(8.8)

%

$

224,313

$

227,508

(1.4)

%

Earnings per share - basic and diluted

$

0.17

$

0.18

(5.6)

%

$

0.46

$

1.03

(55.3)

%

FFO per share and unit (1)

$

0.56

$

0.61

(8.2)

%

$

1.61

$

1.81

(11.0)

%

Core FFO per share and unit (1)

$

0.57

$

0.62

(8.1)

%

$

1.66

$

1.84

(9.8)

%

(1)

Non-GAAP financial measures, including FFO, Core FFO and NOI, are defined in the Glossary in the supplemental financial information and, where appropriate, reconciliations of these measures and other non-GAAP financial measures to their most directly comparable GAAP measures are included in the Schedules to this press release and in the supplemental financial information.

(2)

Executive severance costs relate to the nine months ended September 30, 2024 and are recorded within the line items "General and administrative expenses" and "Non-operating income" in our consolidated statements of operations. Integration costs relate to expenses incurred as a part of the internalization of the PRO structure.

Net income decreased $0.8 million for the third quarter of 2025 and $77.6 million for the nine months ended September 30, 2025 ("year-to-date") as compared to the same periods in 2024. The year-to-date decrease in net income was primarily due to larger gains on the sale of self storage properties recognized during 2024. Additionally, the decrease in net income for both the third quarter of 2025 and year-to-date were a result of lower NOI, driven by property dispositions and negative same store NOI growth. These impacts for the third quarter of 2025 and year-to-date were partially offset by an increase in management fees and other revenue of $0.6 million and $6.4 million, respectively, and a decrease in general and administrative expenses of $1.7 million and $7.6 million, respectively, compared to the same periods in 2024.

The decrease in FFO and Core FFO per share and unit for the third quarter of 2025 and year-to-date was primarily driven by a decrease in same store NOI and an increase in interest expense. These impacts were partially offset by decreased management fees paid to former PROs, reflected within general and administrative expenses, following the internalization of the PRO structure.

Same Store Operating Results (771 Stores)

($ in thousands, except per square foot data)

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

Change

2025

2024

Change

Total revenues

$

170,250

$

174,848

(2.6)

%

$

507,882

$

522,819

(2.9)

%

Property operating expenses

52,830

50,362

4.9

%

157,795

151,172

4.4

%

Net Operating Income (NOI)

$

117,420

$

124,486

(5.7)

%

$

350,087

$

371,647

(5.8)

%

NOI Margin

69.0

%

71.2

%

(2.2)

%

68.9

%

71.1

%

(2.2)

%

Average Occupancy

85.0

%

86.5

%

(1.5)

%

84.4

%

86.2

%

(1.8)

%

Average Annualized Rental Revenue Per Occupied Square Foot

$

15.67

$

15.73

(0.4)

%

$

15.68

$

15.78

(0.6)

%

2

Year-over-year same store total revenue decreased 2.6% for the third quarter of 2025 and 2.9% year-to-date as compared to the same periods in 2024. The decrease for the third quarter was driven primarily by a 150 basis point decrease in average occupancy and a 0.4% decrease in average annualized rental revenue per occupied square foot. The year-to-date same store total revenue decrease was driven primarily by a 180 basis point decrease in average occupancy and a 0.6% decrease in average annualized rental revenue per occupied square foot. Markets which generated above portfolio average same store total revenue growth include: Portland, San Juan, PR and Houston. Markets which generated below portfolio average same store total revenue growth include: Riverside-San Bernardino, Atlanta and Phoenix.

Year-over-year same store property operating expenses increased 4.9% for the third quarter of 2025 and 4.4% year-to-date as compared to the same periods in 2024. The increase was primarily driven by increases in marketing, property tax expense and utilities, partially offset by decreases in insurance costs.

Investment and Disposition Activity

During the third quarter, a joint venture between a subsidiary of NSA and a state pension fund advised by Heitman Capital Management, LLC (the "2023 Joint Venture") acquired two self storage properties for approximately $32.0 million. The 2023 Joint Venture financed the acquisition with capital contributions from the venture members, of which NSA contributed approximately $8.0 million.

During the third quarter, NSA completed the sale of two wholly-owned self storage properties, consisting of approximately 83,000 rentable square feet configured in approximately 600 storage units for approximately $6.5 million.

Balance Sheet

As of September 30, 2025, NSA has approximately $543.6 million of available capacity on its $950.0 million revolving line of credit.

Common Sha re Dividends

On August 13, 2025, NSA's Board of Trustees declared a quarterly cash dividend of $0.57 per common share. The third quarter 2025 dividend was paid on September 30, 2025 to shareholders of record as of September 15, 2025.

3

2025 Guidance

NSA reaffirms its previously provided Core FFO guidance estimates and related assumptions for the year ended December 31, 2025.

Current Ranges for Full Year 2025

Actual Results for Full Year 2024

Low

High

Core FFO per share (1)

$2.17

$2.23

$2.44

Same store operations (2)

Total revenue growth

(3.0)%

(2.0)%

(3.0)%

Property operating expenses growth

3.25%

4.25%

3.7%

NOI growth

(5.75)%

(4.25)%

(5.5)%

General and administrative expenses

General and administrative expenses (excluding equity-based compensation), in millions

$42.0

$44.0

$49.7

Equity-based compensation, in millions

$8.0

$8.5

$7.9

Management fees and other revenue, in millions

$49.0

$51.0

$42.7

Core FFO from unconsolidated real estate ventures, in millions

$20.5

$22.5

$24.2

Acquisitions - consolidated and joint venture (at share), in millions (3)

$50.0

$100.0

$101.8

Dispositions - consolidated and joint venture (at share), in millions (3)

$100.0

$300.0

$273.1

Current Ranges for

Full Year 2025

Low

High

Earnings per share - diluted

$0.71

$0.74

Impact of the difference in weighted average number of shares and GAAP accounting for noncontrolling interests, two-class method and treasury stock method

(0.17)

(0.22)

Add real estate depreciation and amortization

1.43

1.46

Add (subtract) equity in losses (earnings) of unconsolidated real estate ventures

0.08

0.09

Add NSA's share of FFO of unconsolidated real estate ventures

0.15

0.17

Less gain on sale of self storage properties

(0.08)

(0.08)

Add acquisition costs and NSA's share of unconsolidated real estate venture acquisition costs

0.01

0.02

Add integration costs

0.04

0.05

Core FFO per share and unit

$2.17

$2.23

(1)

The table above provides a reconciliation of the range of estimated earnings per share - diluted to estimated Core FFO per share and unit.

(2)

2025 guidance reflects NSA's 2025 same store pool comprising 771 stores. 2024 actual results reflect NSA's 2024 same store pool comprising 776 stores.

(3)

NSA's actual results for full year 2024 exclude the contribution of wholly-owned self storage properties into the 2024 Joint Venture for approximately $346.5 million.

Supplemental Financial Information

The full text of this earnings release and supplemental financial information, including certain financial information referenced in this release, are available on NSA's website at www.nsastorage.com and as exhibit 99.1 to the Company's Form 8-K furnished to the SEC on November 3, 2025.

4

Non-GAAP Financial Measures & Glossary

This press release contains certain non-GAAP financial measures. These non-GAAP measures are presented because NSA's management believes these measures help investors understand NSA's business, performance and ability to earn and distribute cash to its shareholders by providing perspectives not immediately apparent from net income (loss). These measures are also frequently used by securities analysts, investors and other interested parties. The presentations of FFO, Core FFO and NOI in this press release are not intended to be considered in isolation or as a substitute for, or superior to, the financial information prepared and presented in accordance with GAAP. In addition, NSA's method of calculating these measures may be different from methods used by other companies, and, accordingly, may not be comparable to similar measures as calculated by other companies that do not use the same methodology as NSA. These measures, and other words and phrases used herein, are defined in the Glossary in the supplemental financial information and, where appropriate, reconciliations of these measures and other non-GAAP financial measures to their most directly comparable GAAP measures are included in the Schedules to this press release and in the supplemental financial information.

Quarterly Teleconference and Webcast

The Company will host a conference call at 1:00 pm Eastern Time on Tuesday, November 4, 2025 to discuss its third quarter 2025 financial results. At the conclusion of the call, management will accept questions from certified financial analysts. All other participants are encouraged to listen to a webcast of the call by accessing the link found on the Company's website at www.nsastorage.com .

Conference Call and Webcast :

Date/Time: Tuesday, November 4, 2025, 1:00 pm ET

Webcast available at: www.nsastorage.com .

Domestic (Toll Free US & Canada): 877.407.9711

International: 412.902.1014

A replay of the webcast will be available for 30 days on NSA's website at www.nsastorage.com .

Upcoming Industry Conferences

NSA management is scheduled to participate in the upcoming Jefferies Real Estate Conference on November 17- 19, 2025 in Miami, Florida and the Nareit REITworld 2025 Annual Conference on December 8 - 11, 2025 in Dallas, Texas.

About National Storage Affiliates Trust

National Storage Affiliates Trust is a real estate investment trust headquartered in Greenwood Village, Colorado, focused on the ownership, operation and acquisition of self storage properties predominantly located within the top 100 metropolitan statistical areas throughout the United States. As of September 30, 2025, the Company held ownership interests in and operated 1,069 self storage properties, located in 37 states and Puerto Rico with approximately 69.8 million rentable square feet. NSA is one of the largest owners and operators of self storage properties among public and private companies in the United States. For more information, please visit the Company’s website at www.nsastorage.com . NSA is included in the MSCI US REIT Index (RMS/RMZ), the Russell 1000 Index of Companies and the S&P MidCap 400 Index.

5

NOTE REGARDING FORWARD LOOKING STATEMENTS

Certain statements contained in this press release constitute forward-looking statements as such term is defined in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and such statements are intended to be covered by the safe harbor provided by the same. Forward-looking statements are subject to substantial risks and uncertainties, many of which are difficult to predict and are generally beyond the Company's control. These forward-looking statements include information about possible or assumed future results of the Company's business, financial condition, liquidity, results of operations, plans and objectives. Changes in any circumstances may cause the Company's actual results to differ significantly from those expressed in any forward-looking statement. When used in this release, the words "believe," "expect," "anticipate," "estimate," "plan," "continue," "intend," "should," "may" or similar expressions are intended to identify forward-looking statements. Statements regarding the following subjects, among others, may be forward-looking: market trends in the Company's industry, interest rates, inflation, the debt and lending markets or the general economy; the Company's business and investment strategy; the acquisition and disposition of properties, including those under contract and the Company's ability to execute on its acquisition pipeline; the timing of acquisitions or dispositions under contract; the Company's ability to realize the benefits from the internalization of the PRO structure and portfolio optimization strategy; and the Company's guidance estimates for the year ending December 31, 2025. For a further list and description of such risks and uncertainties, see the Company's most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K filed with the Securities and Exchange Commission, and the other documents filed by the Company with the Securities and Exchange Commission. The forward-looking statements, and other risks, uncertainties and factors are based on the Company's beliefs, assumptions and expectations of its future performance, taking into account all information currently available to the Company. Forward-looking statements are not predictions of future events. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Contact:

National Storage Affiliates Trust

Investor/Media Relations

George Hoglund, CFA

Vice President - Investor Relations

720.630.2160

[email protected]

6

National Storage Affiliates Trust

Consolidated Statements of Operations

(in thousands, except per share amounts) (unaudited)

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

2025

2024

REVENUE

Rental revenue

$

169,907

$

174,467

$

509,220

$

529,218

Other property-related revenue

6,459

7,405

19,977

20,654

Management fees and other revenue

12,336

11,749

36,701

30,345

Total revenue

188,702

193,621

565,898

580,217

OPERATING EXPENSES

Property operating expenses

55,347

52,712

166,078

159,607

General and administrative expenses

11,460

13,114

37,409

44,977

Depreciation and amortization

46,885

47,661

142,613

141,702

Other

4,101

3,643

13,077

10,510

Total operating expenses

117,793

117,130

359,177

356,796

OTHER (EXPENSE) INCOME

Interest expense

(40,549)

(39,575)

(122,293)

(114,920)

Loss on early extinguishment of debt

—

(323)

—

(323)

Equity in earnings (losses) of unconsolidated real estate ventures

463

(4,712)

(9,221)

(10,791)

Acquisition and integration costs

(1,439)

(1,164)

(5,924)

(2,151)

Non-operating income (expense)

503

(83)

1,325

352

Gain on sale of self storage properties

—

—

10,996

63,841

Other expense, net

(41,022)

(45,857)

(125,117)

(63,992)

Income before income taxes

29,887

30,634

81,604

159,429

Income tax expense

(871)

(863)

(2,111)

(2,290)

Net income

29,016

29,771

79,493

157,139

Net income attributable to noncontrolling interests

(10,589)

(11,070)

(28,601)

(62,349)

Net income attributable to National Storage Affiliates Trust

18,427

18,701

50,892

94,790

Distributions to preferred shareholders

(5,117)

(5,112)

(15,345)

(15,332)

Net income attributable to common shareholders

$

13,310

$

13,589

$

35,547

$

79,458

Earnings per share - basic and diluted

$

0.17

$

0.18

$

0.46

$

1.03

Weighted average shares outstanding - basic and diluted

76,746

75,760

76,532

77,047

7

National Storage Affiliates Trust

Consolidated Balance Sheets

(dollars in thousands, except per share amounts)

(unaudited)

September 30,

December 31,

2025

2024

ASSETS

Real estate

Self storage properties

$

5,841,786

$

5,864,134

Less accumulated depreciation

(1,175,690)

(1,051,638)

Self storage properties, net

4,666,096

4,812,496

Cash and cash equivalents

26,295

50,408

Restricted cash

1,571

345

Debt issuance costs, net

3,533

5,632

Investment in unconsolidated real estate ventures

235,385

246,193

Other assets, net

189,055

218,482

Operating lease right-of-use assets

20,367

20,906

Total assets

$

5,142,302

$

5,354,462

LIABILITIES AND EQUITY

Liabilities

Debt financing

$

3,403,399

$

3,449,087

Accounts payable and accrued liabilities

109,632

98,657

Interest rate swap liabilities

4,481

471

Operating lease liabilities

22,394

22,888

Deferred revenue

20,355

20,012

Total liabilities

3,560,261

3,591,115

Equity

Preferred shares of beneficial interest, par value $0.01 per share. 50,000,000 authorized, 14,704,845 and 14,695,458 issued (in series) and outstanding at September 30, 2025 and December 31, 2024, respectively, at liquidation preference

341,130

340,895

Common shares of beneficial interest, par value $0.01 per share. 250,000,000 shares authorized, 76,940,983 and 76,344,661 shares issued and outstanding at September 30, 2025 and December 31, 2024, respectively

769

763

Additional paid-in capital

1,252,488

1,249,426

Distributions in excess of earnings

(626,122)

(530,652)

Accumulated other comprehensive income

4,860

15,548

Total shareholders' equity

973,125

1,075,980

Noncontrolling interests

608,916

687,367

Total equity

1,582,041

1,763,347

Total liabilities and equity

$

5,142,302

$

5,354,462

8

Supplemental Schedule 1

Funds From Operations and Core Funds From Operations

(in thousands, except per share and unit amounts) (unaudited)

Reconciliation of Net Income to FFO and Core FFO

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

2025

2024

Net income

$

29,016

$

29,771

$

79,493

$

157,139

Add (subtract):

Real estate depreciation and amortization

46,458

47,286

141,256

140,588

Equity in (earnings) losses of unconsolidated real estate ventures

(463)

4,712

9,221

10,791

Company's share of FFO in unconsolidated real estate ventures

5,627

6,164

16,119

18,026

Gain on sale of self storage properties

—

—

(10,996)

(63,841)

Distributions to preferred shareholders and unitholders

(5,568)

(5,568)

(16,704)

(16,704)

FFO attributable to subordinated performance units (1)

—

—

—

(21,622)

FFO attributable to common shareholders, OP unitholders, and LTIP unitholders

75,070

82,365

218,389

224,377

Add (subtract):

Acquisition costs

302

287

1,162

1,274

Integration and executive severance costs (2)

1,137

907

4,762

1,534

Loss on early extinguishment of debt

—

323

—

323

Core FFO attributable to common shareholders, OP unitholders, and LTIP unitholders

$

76,509

$

83,882

$

224,313

$

227,508

Weighted average shares and units outstanding - FFO and Core FFO: (3)

Weighted average shares outstanding - basic

76,746

75,760

76,532

77,047

Weighted average restricted common shares outstanding

23

19

23

21

Weighted average OP units outstanding

51,833

52,740

52,030

42,709

Weighted average DownREIT OP unit equivalents outstanding

5,769

5,769

5,769

3,346

Weighted average LTIP units outstanding

851

663

887

676

Total weighted average shares and units outstanding - FFO and Core FFO

135,222

134,951

135,241

123,799

FFO per share and unit

$

0.56

$

0.61

$

1.61

$

1.81

Core FFO per share and unit

$

0.57

$

0.62

$

1.66

$

1.84

(1)

Amounts represent distributions declared for subordinated performance unitholders and DownREIT subordinated performance unitholders for the periods presented.

(2)

Executive severance costs relate to the nine months ended September 30, 2024 and are recorded within the line items "General and administrative expenses" and "Non-operating income" in our consolidated statements of operations. Integration costs relate to expenses incurred as a part of the internalization of the PRO structure.

(3)

NSA combines OP units and DownREIT OP units with common shares because, after the applicable lock-out periods, OP units in the Company's operating partnership are redeemable for cash or, at NSA's option, exchangeable for common shares on a one-for-one basis and DownREIT OP units are also redeemable for cash or, at NSA's option, exchangeable for OP units in the Company's operating partnership on a one-for-one basis, subject to certain adjustments in each case. LTIP units may also, under certain circumstances, be convertible into or exchangeable for common shares (or other units that are convertible into or exchangeable for common shares). All subordinated performance units and DownREIT subordinated performance units were converted into OP units on July 1, 2024, in connection with the internalization of the PRO structure. See footnote (4) for additional discussion of subordinated performance units, DownREIT subordinated performance units, and LTIP units in the calculation of FFO and Core FFO per share and unit.

9

Supplemental Schedule 1 (continued)

Funds From Operations and Core Funds From Operations

(in thousands, except per share and unit amounts) (unaudited)

Reconciliation of Earnings Per Share - Diluted to FFO and Core FFO Per Share and Unit

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

2025

2024

Earnings per share - diluted

$

0.17

$

0.18

$

0.46

$

1.03

Impact of the difference in weighted average number of shares (4)

(0.07)

(0.08)

(0.19)

(0.39)

Impact of GAAP accounting for noncontrolling interests, two-class method and treasury stock method (5)

0.08

0.08

0.19

0.49

Add real estate depreciation and amortization

0.34

0.35

1.04

1.14

Add equity in losses of unconsolidated real estate ventures

—

0.03

0.07

0.08

Add Company's share of FFO in unconsolidated real estate ventures

0.04

0.05

0.12

0.15

Subtract gain on sale of self storage properties

—

—

(0.08)

(0.52)

FFO attributable to subordinated performance unitholders

—

—

—

(0.17)

FFO per share and unit

0.56

0.61

1.61

1.81

Add acquisition costs

—

—

0.01

0.01

Add integration and executive severance costs

0.01

0.01

0.04

0.02

Add loss on early extinguishment of debt

—

—

—

—

Core FFO per share and unit

$

0.57

$

0.62

$

1.66

$

1.84

(4)

Adjustment accounts for the difference between the weighted average number of shares used to calculate diluted earnings per share and the weighted average number of shares used to calculate FFO and Core FFO per share and unit. Diluted earnings per share is calculated using the two-class method for the company's restricted common shares and the treasury stock method for certain unvested LTIP units, and assumes the conversion of vested LTIP units into OP units on a one-for-one basis and the hypothetical conversion of subordinated performance units and DownREIT subordinated performance units into OP units, even though such units may have only been convertible into OP units (i) after a lock-out period and (ii) upon certain events or conditions. All outstanding subordinated performance units and DownREIT subordinated performance units were converted into OP units on July 1, 2024, in connection with the internalization of the PRO structure. The computation of weighted average shares and units for FFO and Core FFO per share and unit includes all restricted common shares and LTIP units that participate in distributions and excludes all subordinated performance units and DownREIT subordinated performance units because their effect has been accounted for through the allocation of FFO to the related unitholders based on distributions declared.

(5)

Represents the effect of adjusting the numerator to consolidated net income prior to GAAP allocations for noncontrolling interests, after deducting preferred share and unit distributions, and before the application of the two-class method and treasury stock method, as described in footnote (4) .

10

Supplemental Schedule 2

Other Non-GAAP Financial Measurements

(dollars in thousands) (unaudited)

Net Operating Income

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

2025

2024

Net income

$

29,016

$

29,771

$

79,493

$

157,139

(Subtract) add:

Management fees and other revenue

(12,336)

(11,749)

(36,701)

(30,345)

General and administrative expenses

11,460

13,114

37,409

44,977

Depreciation and amortization

46,885

47,661

142,613

141,702

Other

4,101

3,643

13,077

10,510

Interest expense

40,549

39,575

122,293

114,920

Loss on early extinguishment of debt

—

323

—

323

Equity in (earnings) losses of unconsolidated real estate ventures

(463)

4,712

9,221

10,791

Acquisition and integration costs

1,439

1,164

5,924

2,151

Non-operating (income) expense

(503)

83

(1,325)

(352)

Gain on sale of self storage properties

—

—

(10,996)

(63,841)

Income tax expense

871

863

2,111

2,290

Net Operating Income

$

121,019

$

129,160

$

363,119

$

390,265

EBITDA and Adjusted EBITDA

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

2025

2024

Net income

$

29,016

$

29,771

$

79,493

$

157,139

Add:

Depreciation and amortization

46,885

47,661

142,613

141,702

Company's share of unconsolidated real estate venture depreciation and amortization

5,193

5,418

15,821

15,110

Interest expense

40,549

39,575

122,293

114,920

Income tax expense

871

863

2,111

2,290

Loss on early extinguishment of debt

—

323

—

323

EBITDA

122,514

123,611

362,331

431,484

Add (subtract):

Acquisition costs

302

287

1,162

1,274

Effect of hypothetical liquidation at book value (HLBV) accounting for unconsolidated 2024 Joint Venture (1)

(30)

5,458

9,518

13,707

Gain on sale of self storage properties

—

—

(10,996)

(63,841)

Integration and executive severance costs, excluding equity-based compensation (2)

—

877

1,388

1,100

Equity-based compensation expense (3)

3,112

1,911

9,329

6,097

Adjusted EBITDA

$

125,898

$

132,144

$

372,732

$

389,821

(1)

Reflects the non-cash impact of applying HLBV to the 2024 Joint Venture, which allocates GAAP income (loss) on a hypothetical liquidation of the underlying joint venture at book value as of the reporting date.

(2)

Executive severance costs relate to the nine months ended September 30, 2024 and are recorded within the line items "General and administrative expenses" and "Non-operating income" in our consolidated statements of operations. Integration costs relate to expenses incurred as a part of the internalization of the PRO structure.

(3)

Equity-based compensation expense is a non-cash item recorded within general and administrative expenses and acquisition and integration costs in our consolidated statements of operations. For the three and nine months ended September 30, 2025, $1.1 million and $3.4 million, respectively, relates to the internalization of the PRO structure and is included in acquisition and integration costs.

11

Supplemental Schedule 3

Portfolio Summary

As of September 30, 2025

(dollars in thousands) (unaudited)

Wholly-Owned Store Data by State (Consolidated)

Total Operated Store Data by State (Consolidated & Unconsolidated)

State/Territories

Stores

Units

Rentable Square Feet

Occupancy at Period End

State/Territories

Stores

Units

Rentable Square Feet

Occupancy at Period End

Texas

176

80,992

11,294,192

84.6

%

Texas

203

98,085

13,405,060

84.8

%

California

86

51,663

6,494,828

82.8

%

Florida

105

60,419

6,816,000

82.4

%

Florida

78

45,394

5,100,451

81.6

%

California

99

58,660

7,341,581

83.0

%

Oregon

70

29,264

3,662,029

88.8

%

Georgia

72

33,516

4,598,338

82.3

%

Georgia

50

21,948

3,017,563

81.7

%

Oregon

70

29,264

3,662,029

88.8

%

North Carolina

35

17,269

2,160,512

87.7

%

Oklahoma

52

22,401

3,269,410

81.2

%

Arizona

34

18,883

2,174,965

78.9

%

Arizona

36

19,892

2,285,095

78.5

%

Oklahoma

33

15,292

2,139,756

82.2

%

North Carolina

35

17,269

2,160,512

87.7

%

Louisiana

25

11,459

1,388,685

79.2

%

Ohio

27

14,898

1,854,692

85.2

%

Pennsylvania

22

10,441

1,296,220

88.2

%

Michigan

25

15,972

2,023,848

87.7

%

Colorado

21

9,117

1,145,258

88.7

%

Pennsylvania

25

12,076

1,456,890

88.4

%

Washington

19

6,643

871,889

86.9

%

Alabama

25

11,824

1,759,711

80.0

%

Puerto Rico

15

12,854

1,379,277

89.2

%

Louisiana

25

11,459

1,388,685

79.2

%

Nevada

15

7,564

963,252

84.5

%

Kansas

22

8,429

1,121,502

88.7

%

New Hampshire

15

7,160

890,320

85.2

%

Tennessee

21

10,914

1,400,552

88.1

%

Kansas

15

5,577

721,923

89.0

%

Colorado

21

9,117

1,145,258

88.7

%

Indiana

12

6,530

827,524

80.8

%

New Jersey

20

13,512

1,603,307

86.3

%

New Mexico

12

5,775

750,498

79.7

%

Indiana

19

9,821

1,286,329

82.2

%

Alabama

11

6,033

909,280

75.3

%

Nevada

19

9,449

1,247,570

83.9

%

Other (1)

63

35,985

4,425,913

85.4

%

Washington

19

6,643

871,889

86.9

%

Total

807

405,843

51,614,335

84.0

%

Puerto Rico

15

12,854

1,379,277

89.2

%

Massachusetts

15

11,058

1,209,811

86.4

%

New Hampshire

15

7,160

890,320

85.2

%

New Mexico

12

5,775

750,498

79.7

%

Minnesota

11

5,562

709,345

87.4

%

Illinois

10

6,772

728,593

85.5

%

Other (2)

51

28,069

3,471,095

85.1

%

Total

1,069

550,870

69,837,197

84.4

%

(1)

Other states in NSA's owned portfolio as of September 30, 2025 include Connecticut, Idaho, Illinois, Iowa, Kentucky, Maryland, Massachusetts, Minnesota, Missouri, New Jersey, New York, Ohio, South Carolina, Tennessee and Virginia.

(2)

Other states in NSA's operated portfolio as of September 30, 2025 include Connecticut, Delaware, Idaho, Iowa, Kentucky, Maryland, Mississippi, Missouri, New York, Rhode Island, South Carolina and Virginia.

12

Supplemental Schedule 3 (continued)

Portfolio Summary

(dollars in thousands) (unaudited)

2025 Acquisition Activity

Self Storage Properties Acquired

During the Quarter Ended:

Summary of Investment

Stores

Units

Rentable Square Feet

Cash and Acquisition Costs

Value of Equity

Other

Total

March 31, 2025

3

1,031

107,041

$

12,434

$

—

$

1,060

$

13,494

June 30, 2025

1

718

86,906

11,328

—

48

11,376

September 30, 2025

—

—

—

—

—

—

—

Unconsolidated Real Estate Ventures (at 100%) (3)

March 31, 2025

—

—

—

—

—

—

—

June 30, 2025

1

623

54,750

17,963

—

50

18,013

September 30, 2025

2

1,020

158,933

32,084

—

(88)

31,996

Total Investments (4)

7

3,392

407,630

$

73,809

$

—

$

1,070

$

74,879

2025 Disposition & Divestiture Activity

Dispositions Closed During the Quarter Ended: (5)

Stores

Units

Rentable Square Feet

Net Proceeds

Self Storage Properties sold to 3rd Parties

March 31, 2025

2

394

82,270

$

9,752

June 30, 2025

8

3,817

580,002

57,350

September 30, 2025

2

553

82,972

5,962

Total Dispositions and Divestitures

12

4,764

745,244

$

73,064

(3)

Values represent entire unconsolidated real estate ventures at 100%, not NSA's proportionate share. NSA's ownership in each of the unconsolidated real estate ventures is 25%.

(4)

NSA through its unconsolidated real estate ventures and wholly-owned portfolio acquired self storage properties located in California (1), Kansas (1), New Mexico (2), New York (1), Tennessee (1) and Texas (1).

(5)

NSA disposed of self storage properties located in Arkansas (5), Colorado (1), Florida (1), Minnesota (1), Montana (1), Utah (1), Wisconsin (1) and Wyoming (1).

13

Supplemental Schedule 4

Debt and Equity Capitalization

BBB Rated

As of September 30, 2025

(with Stable Outlook)

(unaudited)

by Kroll Bond Rating Agency

Debt Summary (dollars in thousands)

Effective Interest Rate (1)

Basis of Rate

Maturity Date

2025

2026

2027

2028

2029

2030

2031

Thereafter

Total

Credit Facility:

Revolving line of credit (2)

5.67%

Variable (3)

January 2027

$

—

$

—

$

399,400

$

—

$

—

$

—

$

—

$

—

$

399,400

Term loan - Tranche D

4.11%

Swapped To Fixed

July 2026

—

275,000

—

—

—

—

—

—

275,000

Term loan - Tranche E

5.03%

Swapped To Fixed (3)

March 2027

—

—

130,000

—

—

—

—

—

130,000

Term loan facility - 2028

4.17%

Swapped To Fixed

December 2028

—

—

—

75,000

—

—

—

—

75,000

Term loan facility - April 2029

3.77%

Swapped To Fixed

April 2029

—

—

—

—

100,000

—

—

—

100,000

Term loan facility - June 2029

5.07%

Swapped To Fixed

June 2029

—

—

—

—

285,000

—

—

—

285,000

May 2026 Senior Unsecured Notes

2.16%

Fixed

May 2026

—

35,000

—

—

—

—

—

—

35,000

October 2026 Senior Unsecured Notes

6.46%

Fixed

October 2026

—

65,000

—

—

—

—

—

—

65,000

July 2028 Senior Unsecured Notes

5.75%

Fixed

July 2028

—

—

—

120,000

—

—

—

—

120,000

September 2028 Senior Unsecured Notes

5.40%

Fixed

September 2028

—

—

—

75,000

—

—

—

—

75,000

October 2028 Senior Unsecured Notes

6.55%

Fixed

October 2028

—

—

—

100,000

—

—

—

—

100,000

2029 Senior Unsecured Notes

3.98%

Fixed

August 2029

—

—

—

—

100,000

—

—

—

100,000

August 2030 Senior Unsecured Notes

2.99%

Fixed

August 2030

—

—

—

—

—

150,000

—

—

150,000

October 2030 Senior Unsecured Notes

6.66%

Fixed

October 2030

—

—

—

—

—

35,000

—

—

35,000

November 2030 Senior Unsecured Notes

2.72%

Fixed

November 2030

—

—

—

—

—

75,000

—

—

75,000

May 2031 Senior Unsecured Notes

3.00%

Fixed

May 2031

—

—

—

—

—

—

90,000

—

90,000

August 2031 Senior Unsecured Notes

4.08%

Fixed

August 2031

—

—

—

—

—

—

50,000

—

50,000

September 2031 Senior Unsecured Notes

5.55%

Fixed

September 2031

—

—

—

—

—

—

125,000

—

125,000

November 2031 Senior Unsecured Notes

2.81%

Fixed

November 2031

—

—

—

—

—

—

175,000

—

175,000

August 2032 Senior Unsecured Notes

3.09%

Fixed

August 2032

—

—

—

—

—

—

—

100,000

100,000

November 2032 Senior Unsecured Notes

5.06%

Fixed

November 2032

—

—

—

—

—

—

—

200,000

200,000

May 2033 Senior Unsecured Notes

3.10%

Fixed

May 2033

—

—

—

—

—

—

—

55,000

55,000

October 2033 Senior Unsecured Notes

6.73%

Fixed

October 2033

—

—

—

—

—

—

—

50,000

50,000

November 2033 Senior Unsecured Notes

2.96%

Fixed

November 2033

—

—

—

—

—

—

—

125,000

125,000

2034 Senior Unsecured Notes

5.74%

Fixed

September 2034

—

—

—

—

—

—

—

150,000

150,000

2036 Senior Unsecured Notes

3.06%

Fixed

November 2036

—

—

—

—

—

—

—

75,000

75,000

Fixed rate mortgages payable

3.54%

Fixed

August 2027 - October 2031

—

—

84,900

88,000

—

—

26,267

—

199,167

Total Principal/Weighted Average

4.50%

4.25 years

$

—

$

375,000

$

614,300

$

458,000

$

485,000

$

260,000

$

466,267

$

755,000

$

3,413,567

Weighted average effective interest rate of maturing debt

—%

4.33%

5.32%

5.04%

4.58%

3.41%

3.80%

4.36%

Unamortized debt issuance costs and debt premium, net

(10,168)

Total Debt

$

3,403,399

(1)

Effective interest rate incorporates the stated rate plus the impact of interest rate cash flow hedges and discount and premium amortization, if applicable.

(2)

NSA may, at its election, extend the maturity date of the revolving line of credit to January 2028, subject to meeting customary conditions and payment of an extension fee.

(3)

For the $950 million revolving line of credit, the effective interest rate is calculated based on Daily Simple SOFR plus an applicable margin of 1.45% and a SOFR Index Adjustment of 0.10%, and excludes fees which range from 0.15% to 0.20% for unused borrowings. $125.0 million of the Tranche E term loan is subject to interest rate swaps, the maturity of which extends through the Tranche E maturity.

14

Supplemental Schedule 4 (continued)

Debt and Equity Capitalization

As of September 30, 2025

(unaudited)

Debt Ratios

Covenant

Amount

Net Debt to Annualized Current Quarter Adjusted EBITDA

n/a

6.7x

Trailing Twelve Month Fixed Charge Coverage Ratio

> 1.5x

2.6x

Total Leverage Ratio

< 60.0%

46.6%

Preferred Shares and Units

Outstanding

6.000% Series A cumulative redeemable preferred shares of beneficial interest

9,036,717

6.000% Series B cumulative redeemable preferred shares of beneficial interest

4,608,445

Preferred shares of beneficial interest (4)

13,645,162

6.000% Series A-1 cumulative redeemable preferred units

1,193,211

Common Shares and Units

Outstanding

Common shares of beneficial interest

76,917,707

Restricted common shares

23,276

Total shares outstanding

76,940,983

Operating partnership units

51,630,699

DownREIT operating partnership unit equivalents

5,769,214

Total operating partnership units

57,399,913

Long-term incentive plan units

850,663

Total common shares and units outstanding

135,191,559

(4)

The Company's balance sheet at September 30, 2025 reflects 14,704,845 preferred shares of beneficial interest, which includes 5,668,128 Series B Preferred Shares issued and outstanding. We have reflected 13,645,162 preferred shares herein, which corresponds to the $341.1 million liquidation preference reflected on the balance sheet at September 30, 2025. As part of a 2023 property acquisition of 15 properties from one of the Company's former participating regional operators (the "Contributor"), the Company recorded a $26.1 million promissory note receivable from the Contributor, and the Contributor used the loan proceeds to acquire $26.1 million of OP equity. The promissory note bears interest at a rate equivalent to the dividends paid on 1,059,683 Series B Preferred Shares. As a result of these agreements, in accordance with GAAP, the $26.1 million promissory note receivable, interest income on the promissory note receivable, $26.1 million of Series B Preferred Shares value, and dividends on such Series B Preferred Shares have been offset for presentation purposes in the accompanying consolidated balance sheets and consolidated statements of operations.

15

Supplemental Schedule 5

Summarized Information for Unconsolidated Real Estate Ventures

(dollars in thousands) (unaudited)

Real Estate Venture Balance Sheet Data as of September 30, 2025

Number of Stores at September 30,

Occupancy at Period End

Real Estate Ventures

Carrying Value of NSA's Investment (1)

Gross Book Value of Real Estate Assets

Outstanding Debt

2025

2024

Total Rentable Square Feet

3Q 2025

3Q 2024

2016 Joint Venture

$

95,783

$

930,603

$

358,484

81

81

5,689,390

85.3

%

88.4

%

2018 Joint Venture

89,882

1,285,494

646,354

104

104

7,863,592

86.4

%

87.8

%

2023 Joint Venture

48,566

197,030

—

21

18

1,449,092

80.2

%

73.6

%

2024 Joint Venture

1,154

345,616

209,198

56

56

3,220,788

85.0

%

86.0

%

Total

$

235,385

$

2,758,743

$

1,214,036

262

259

18,222,862

85.3

%

86.7

%

Combined Operating Information (2)

Three Months Ended September 30, 2025

Nine Months Ended September 30, 2025

2016 Joint Venture

2018 Joint Venture

2023 Joint Venture

2024 Joint Venture

Total

2016 Joint Venture

2018 Joint Venture

2023 Joint Venture

2024 Joint Venture

Total

Total revenue

$

22,385

$

28,011

$

3,259

$

9,220

$

62,875

$

67,031

$

83,325

$

8,180

$

27,633

$

186,169

Property operating expenses

7,659

9,022

1,376

3,733

21,790

22,984

27,389

3,579

11,663

65,615

Net operating income

14,726

18,989

1,883

5,487

41,085

44,047

55,936

4,601

15,970

120,554

Supervisory, administrative and other expenses

(1,624)

(1,727)

(250)

(487)

(4,088)

(4,856)

(5,151)

(657)

(1,452)

(12,116)

Depreciation and amortization

(5,602)

(10,032)

(2,053)

(3,084)

(20,771)

(16,813)

(30,453)

(5,959)

(10,059)

(63,284)

Interest expense

(3,274)

(7,144)

—

(3,235)

(13,653)

(9,849)

(21,480)

—

(9,704)

(41,033)

Non-operating (expense) income

(45)

435

(10)

50

430

(1)

644

4

274

921

Net income (loss)

$

4,181

$

521

$

(430)

$

(1,269)

$

3,003

$

12,528

$

(504)

$

(2,011)

$

(4,971)

$

5,042

Add (subtract):

Unconsolidated real estate venture depreciation and amortization

5,602

10,032

2,053

3,084

20,771

16,813

30,453

5,959

10,059

63,284

FFO and Core FFO for unconsolidated real estate ventures

$

9,783

$

10,553

$

1,623

$

1,815

$

23,774

$

29,341

$

29,949

$

3,948

$

5,088

$

68,326

(1)

NSA's investment in its unconsolidated real estate ventures are recorded under the equity method of accounting. Under the equity method, NSA’s investments in unconsolidated real estate ventures are stated at cost and adjusted for NSA’s share of net earnings or losses and reduced by distributions.

(2)

Values represent entire unconsolidated real estate ventures at 100%, not NSA's proportionate share. NSA's ownership in each of the unconsolidated real estate ventures is 25%. The operating agreements of the unconsolidated real estate ventures provide for the distribution of net cash flow to the unconsolidated real estate ventures' investors no less than monthly, generally in proportion to the investors’ respective ownership interests, subject to a promoted distribution to NSA upon the achievement of certain performance benchmarks by the non-NSA investor.

16

Supplemental Schedule 6

Same Store Performance Summary By MSA (1)

(dollars in thousands, except per square foot data) (unaudited)

Three Months Ended September 30, 2025 compared to Three Months Ended September 30, 2024

Total Revenue

Property Operating Expenses

Net Operating Income

Net Operating Income Margin

MSA (1)

Stores

3Q 2025

3Q 2024

Change

3Q 2025

3Q 2024

Change

3Q 2025

3Q 2024

Change

3Q 2025

3Q 2024

Change

Portland-Vancouver-Hillsboro, OR-WA

54

$

11,727

$

11,459

2.3

%

$

3,122

$

2,899

7.7

%

$

8,605

$

8,560

0.5

%

73.4

%

74.7

%

(1.3)

%

Riverside-San Bernardino-Ontario, CA

49

12,976

13,640

(4.9)

%

3,296

2,977

10.7

%

9,680

10,663

(9.2)

%

74.6

%

78.2

%

(3.6)

%

Houston-Pasadena-The Woodlands, TX

37

8,336

8,379

(0.5)

%

3,170

2,845

11.4

%

5,166

5,534

(6.6)

%

62.0

%

66.0

%

(4.0)

%

Atlanta-Sandy Springs-Roswell, GA

30

5,405

5,804

(6.9)

%

1,907

1,849

3.1

%

3,498

3,955

(11.6)

%

64.7

%

68.1

%

(3.4)

%

Dallas-Fort Worth-Arlington, TX

28

4,928

5,189

(5.0)

%

2,057

1,892

8.7

%

2,871

3,297

(12.9)

%

58.3

%

63.5

%

(5.2)

%

Phoenix-Mesa-Chandler, AZ

26

5,522

5,981

(7.7)

%

1,666

1,488

12.0

%

3,856

4,493

(14.2)

%

69.8

%

75.1

%

(5.3)

%

McAllen-Edinburg-Mission, TX

21

4,509

4,598

(1.9)

%

1,399

1,268

10.3

%

3,110

3,330

(6.6)

%

69.0

%

72.4

%

(3.4)

%

Oklahoma City, OK

20

3,163

3,332

(5.1)

%

1,066

861

23.8

%

2,097

2,471

(15.1)

%

66.3

%

74.2

%

(7.9)

%

Brownsville-Harlingen, TX

16

2,886

2,876

0.3

%

891

878

1.5

%

1,995

1,998

(0.2)

%

69.1

%

69.5

%

(0.4)

%

San Antonio-New Braunfels, TX

15

2,684

2,813

(4.6)

%

1,050

1,188

(11.6)

%

1,634

1,625

0.6

%

60.9

%

57.8

%

3.1

%

North Port-Bradenton-Sarasota, FL

15

4,129

4,341

(4.9)

%

1,229

1,469

(16.3)

%

2,900

2,872

1.0

%

70.2

%

66.2

%

4.0

%

San Juan-Bayamón-Caguas, PR

15

9,819

9,633

1.9

%

1,909

1,965

(2.8)

%

7,910

7,668

3.2

%

80.6

%

79.6

%

1.0

%

Los Angeles-Long Beach-Anaheim, CA

14

5,783

5,977

(3.2)

%

1,538

1,398

10.0

%

4,245

4,579

(7.3)

%

73.4

%

76.6

%

(3.2)

%

Colorado Springs, CO

14

2,168

2,207

(1.8)

%

792

664

19.3

%

1,376

1,543

(10.8)

%

63.5

%

69.9

%

(6.4)

%

Orlando-Kissimmee-Sanford, FL

14

3,178

3,413

(6.9)

%

1,100

1,135

(3.1)

%

2,078

2,278

(8.8)

%

65.4

%

66.7

%

(1.3)

%

Tulsa, OK

13

1,959

2,057

(4.8)

%

642

567

13.2

%

1,317

1,490

(11.6)

%

67.2

%

72.4

%

(5.2)

%

Las Vegas-Henderson-North Las Vegas, NV

13

2,806

2,936

(4.4)

%

834

749

11.3

%

1,972

2,187

(9.8)

%

70.3

%

74.5

%

(4.2)

%

Shreveport-Bossier City, LA

12

1,526

1,568

(2.7)

%

619

521

18.8

%

907

1,047

(13.4)

%

59.4

%

66.8

%

(7.4)

%

Austin-Round Rock-San Marcos, TX

12

3,218

3,436

(6.3)

%

1,116

1,196

(6.7)

%

2,102

2,240

(6.2)

%

65.3

%

65.2

%

0.1

%

Wichita, KS

12

1,847

1,807

2.2

%

725

632

14.7

%

1,122

1,175

(4.5)

%

60.7

%

65.0

%

(4.3)

%

Bend, OR

10

2,049

2,093

(2.1)

%

499

448

11.4

%

1,550

1,645

(5.8)

%

75.6

%

78.6

%

(3.0)

%

Other MSAs

331

69,632

71,309

(2.4)

%

22,203

21,473

3.4

%

47,429

49,836

(4.8)

%

68.1

%

69.9

%

(1.8)

%

Total/Weighted Average

771

$

170,250

$

174,848

(2.6)

%

$

52,830

$

50,362

4.9

%

$

117,420

$

124,486

(5.7)

%

69.0

%

71.2

%

(2.2)

%

2024 Same Store Pool (2)

744

$

164,589

$

169,193

(2.7)

%

$

50,824

$

48,412

5.0

%

$

113,765

$

120,781

(5.8)

%

69.1

%

71.4

%

(2.3)

%

2023 Same Store Pool (3)

695

$

153,645

$

158,217

(2.9)

%

$

47,047

$

44,797

5.0

%

$

106,598

$

113,420

(6.0)

%

69.4

%

71.7

%

(2.3)

%

(1)

MSA (Metropolitan Statistical Area) as defined by the United States Census Bureau.

(2)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2024.

(3)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2023.

17

Supplemental Schedule 6 (continued)

Same Store Performance Summary By MSA (1)

(dollars in thousands, except per square foot data) (unaudited)

Three Months Ended September 30, 2025 compared to Three Months Ended September 30, 2024

Rentable Square Feet

Occupancy at Period End

Average Occupancy

Average Annualized Rental Revenue per Occupied Square Foot

MSA (1)

Units

3Q 2025

3Q 2024

Change

3Q 2025

3Q 2024

Change

3Q 2025

3Q 2024

Change

Portland-Vancouver-Hillsboro, OR-WA

22,068

2,677,879

88.7

%

88.8

%

(0.1)

%

89.6

%

89.4

%

0.2

%

$

18.97

$

18.54

2.3

%

Riverside-San Bernardino-Ontario, CA

27,155

3,687,843

83.8

%

87.4

%

(3.6)

%

83.7

%

87.2

%

(3.5)

%

16.24

16.25

(0.1)

%

Houston-Pasadena-The Woodlands, TX

18,421

2,762,756

85.8

%

90.1

%

(4.3)

%

86.4

%

90.4

%

(4.0)

%

13.40

12.80

4.7

%

Atlanta-Sandy Springs-Roswell, GA

14,207

1,986,675

82.3

%

82.9

%

(0.6)

%

81.8

%

83.5

%

(1.7)

%

12.78

13.40

(4.6)

%

Dallas-Fort Worth-Arlington, TX

12,847

1,672,270

80.5

%

81.9

%

(1.4)

%

80.8

%

83.3

%

(2.5)

%

13.98

14.13

(1.1)

%

Phoenix-Mesa-Chandler, AZ

15,239

1,705,135

78.6

%

82.5

%

(3.9)

%

78.7

%

83.0

%

(4.3)

%

15.91

16.23

(2.0)

%

McAllen-Edinburg-Mission, TX

9,848

1,467,078

89.2

%

89.1

%

0.1

%

88.9

%

90.0

%

(1.1)

%

13.28

13.43

(1.1)

%

Oklahoma City, OK

9,180

1,327,602

82.6

%

86.2

%

(3.6)

%

82.7

%

87.2

%

(4.5)

%

11.05

11.05

—

%

Brownsville-Harlingen, TX

6,536

940,371

89.3

%

89.2

%

0.1

%

89.2

%

89.0

%

0.2

%

13.18

13.10

0.6

%

San Antonio-New Braunfels, TX

6,491

835,115

83.5

%

83.8

%

(0.3)

%

83.7

%

83.8

%

(0.1)

%

14.73

15.35

(4.0)

%

North Port-Bradenton-Sarasota, FL

9,402

959,833

84.9

%

86.3

%

(1.4)

%

84.8

%

85.6

%

(0.8)

%

19.64

20.34

(3.4)

%

San Juan-Bayamón-Caguas, PR

12,854

1,379,277

89.2

%

91.2

%

(2.0)

%

89.2

%

91.5

%

(2.3)

%

31.02

29.46

5.3

%

Los Angeles-Long Beach-Anaheim, CA

9,749

1,063,694

84.0

%

86.6

%

(2.6)

%

84.0

%

87.1

%

(3.1)

%

25.20

24.92

1.1

%

Colorado Springs, CO

5,633

707,710

87.8

%

85.6

%

2.2

%

87.7

%

87.7

%

—

%

13.40

13.62

(1.6)

%

Orlando-Kissimmee-Sanford, FL

8,070

950,696

82.9

%

88.5

%

(5.6)

%

83.5

%

89.5

%

(6.0)

%

15.37

14.72

4.4

%

Tulsa, OK

6,112

812,154

81.5

%

85.0

%

(3.5)

%

81.5

%

86.3

%

(4.8)

%

11.29

11.17

1.1

%

Las Vegas-Henderson-North Las Vegas, NV

7,080

880,970

84.1

%

85.7

%

(1.6)

%

86.9

%

86.2

%

0.7

%

14.09

14.77

(4.6)

%

Shreveport-Bossier City, LA

5,102

669,571

81.3

%

82.1

%

(0.8)

%

81.1

%

83.6

%

(2.5)

%

10.66

10.62

0.4

%

Austin-Round Rock-San Marcos, TX

6,855

917,244

83.6

%

84.3

%

(0.7)

%

84.5

%

84.9

%

(0.4)

%

16.10

17.04

(5.5)

%

Wichita, KS

4,198

586,931

89.7

%

86.6

%

3.1

%

90.9

%

87.5

%

3.4

%

12.96

13.11

(1.1)

%

Bend, OR

3,937

570,674

90.8

%

89.0

%

1.8

%

91.1

%

89.6

%

1.5

%

15.27

15.84

(3.6)

%

Other MSAs

165,028

20,715,145

84.2

%

84.8

%

(0.6)

%

84.9

%

85.6

%

(0.7)

%

15.25

15.43

(1.2)

%

Total/Weighted Average

386,012

49,276,623

84.5

%

85.9

%

(1.4)

%

85.0

%

86.5

%

(1.5)

%

$

15.67

$

15.73

(0.4)

%

2024 Same Store Pool (2)

371,569

47,560,078

84.6

%

85.9

%

(1.3)

%

85.0

%

86.5

%

(1.5)

%

$

15.70

$

15.78

(0.5)

%

2023 Same Store Pool (3)

344,886

44,257,563

84.5

%

86.0

%

(1.5)

%

85.0

%

86.7

%

(1.7)

%

$

15.75

$

15.85

(0.6)

%

(1)

MSA (Metropolitan Statistical Area) as defined by the United States Census Bureau.

(2)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2024.

(3)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2023.

18

Supplemental Schedule 6

Same Store Performance Summary By MSA (1)

(dollars in thousands, except per square foot data) (unaudited)

Nine Months Ended September 30, 2025 compared to Nine Months Ended September 30, 2024

Total Revenue

Property Operating Expenses

Net Operating Income

Net Operating Income Margin

MSA (1)

Stores

YTD 2025

YTD 2024

Change

YTD 2025

YTD 2024

Change

YTD 2025

YTD 2024

Change

YTD 2025

YTD 2024

Change

Portland-Vancouver-Hillsboro, OR-WA

54

$

34,501

$

33,883

1.8

%

$

9,689

$

8,964

8.1

%

$

24,812

$

24,919

(0.4)

%

71.9

%

73.5

%

(1.6)

%

Riverside-San Bernardino-Ontario, CA

49

39,064

41,139

(5.0)

%

9,542

9,409

1.4

%

29,522

31,730

(7.0)

%

75.6

%

77.1

%

(1.5)

%

Houston-Pasadena-The Woodlands, TX

37

24,903

24,674

0.9

%

9,079

8,600

5.6

%

15,824

16,074

(1.6)

%

63.5

%

65.1

%

(1.6)

%

Atlanta-Sandy Springs-Roswell, GA

30

16,269

17,834

(8.8)

%

5,579

5,161

8.1

%

10,690

12,673

(15.6)

%

65.7

%

71.1

%

(5.4)

%

Dallas-Fort Worth-Arlington, TX

28

14,700

15,496

(5.1)

%

5,953

5,842

1.9

%

8,747

9,654

(9.4)

%

59.5

%

62.3

%

(2.8)

%

Phoenix-Mesa-Chandler, AZ

26

16,764

18,043

(7.1)

%

4,709

4,719

(0.2)

%

12,055

13,324

(9.5)

%

71.9

%

73.8

%

(1.9)

%

McAllen-Edinburg-Mission, TX

21

13,522

13,933

(2.9)

%

3,835

3,767

1.8

%

9,687

10,166

(4.7)

%

71.6

%

73.0

%

(1.4)

%

Oklahoma City, OK

20

9,652

9,927

(2.8)

%

3,083

2,722

13.3

%

6,569

7,205

(8.8)

%

68.1

%

72.6

%

(4.5)

%

Brownsville-Harlingen, TX

16

8,576

8,643

(0.8)

%

2,538

2,405

5.5

%

6,038

6,238

(3.2)

%

70.4

%

72.2

%

(1.8)

%

San Antonio-New Braunfels, TX

15

8,065

8,403

(4.0)

%

3,253

3,135

3.8

%

4,812

5,268

(8.7)

%

59.7

%

62.7

%

(3.0)

%

North Port-Bradenton-Sarasota, FL

15

12,573

13,409

(6.2)

%

3,934

4,348

(9.5)

%

8,639

9,061

(4.7)

%

68.7

%

67.6

%

1.1

%

San Juan-Bayamón-Caguas, PR

15

29,108

28,689

1.5

%

5,664

5,627

0.7

%

23,444

23,062

1.7

%

80.5

%

80.4

%

0.1

%

Los Angeles-Long Beach-Anaheim, CA

14

17,218

18,018

(4.4)

%

4,536

4,335

4.6

%

12,682

13,683

(7.3)

%

73.7

%

75.9

%

(2.2)

%

Colorado Springs, CO

14

6,323

6,470

(2.3)

%

2,387

2,001

19.3

%

3,936

4,469

(11.9)

%

62.2

%

69.1

%

(6.9)

%

Orlando-Kissimmee-Sanford, FL

14

9,505

10,248

(7.3)

%

3,051

3,337

(8.6)

%

6,454

6,911

(6.6)

%

67.9

%

67.4

%

0.5

%

Tulsa, OK

13

5,926

6,210

(4.6)

%

1,880

1,785

5.3

%

4,046

4,425

(8.6)

%

68.3

%

71.3

%

(3.0)

%

Las Vegas-Henderson-North Las Vegas, NV

13

8,526

8,827

(3.4)

%

2,318

2,281

1.6

%

6,208

6,546

(5.2)

%

72.8

%

74.2

%

(1.4)

%

Shreveport-Bossier City, LA

12

4,537

4,721

(3.9)

%

1,789

1,570

13.9

%

2,748

3,151

(12.8)

%

60.6

%

66.7

%

(6.1)

%

Austin-Round Rock-San Marcos, TX

12

9,699

10,112

(4.1)

%

3,305

3,445

(4.1)

%

6,394

6,667

(4.1)

%

65.9

%

65.9

%

—

%

Wichita, KS

12

5,401

5,318

1.6

%

2,235

1,814

23.2

%

3,166

3,504

(9.6)

%

58.6

%

65.9

%

(7.3)

%

Bend, OR

10

6,029

6,155

(2.0)

%

1,543

1,390

11.0

%

4,486

4,765

(5.9)

%

74.4

%

77.4

%

(3.0)

%

Other MSAs

331

207,021

212,667

(2.7)

%

67,893

64,515

5.2

%

139,128

148,152

(6.1)

%

67.2

%

69.7

%

(2.5)

%

Total/Weighted Average

771

$

507,882

$

522,819

(2.9)

%

$

157,795

$

151,172

4.4

%

$

350,087

$

371,647

(5.8)

%

68.9

%

71.1

%

(2.2)

%

2024 Same Store Pool (2)

744

$

491,158

$

505,983

(2.9)

%

$

151,993

$

145,272

4.6

%

$

339,165

$

360,711

(6.0)

%

69.1

%

71.3

%

(2.2)

%

2023 Same Store Pool (3)

695

$

458,896

$

473,245

(3.0)

%

$

140,679

$

134,532

4.6

%

$

318,217

$

338,713

(6.1)

%

69.3

%

71.6

%

(2.3)

%

(1)

MSA (Metropolitan Statistical Area) as defined by the United States Census Bureau.

(2)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2024.

(3)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2023.

19

Supplemental Schedule 6 (continued)

Same Store Performance Summary By MSA (1)

(dollars in thousands, except per square foot data) (unaudited)

Nine Months Ended September 30, 2025 compared to Nine Months Ended September 30, 2024

Rentable Square Feet

Occupancy at Period End

Average Occupancy

Average Annualized Rental Revenue per Occupied Square Foot

MSA (1)

Units

YTD 2025

YTD 2024

Change

YTD 2025

YTD 2024

Change

YTD 2025

YTD 2024

Change

Portland-Vancouver-Hillsboro, OR-WA

22,068

2,677,879

88.7

%

88.8

%

(0.1)

%

88.6

%

87.6

%

1.0

%

$

18.80

$

18.65

0.8

%

Riverside-San Bernardino-Ontario, CA

27,155

3,687,843

83.8

%

87.4

%

(3.6)

%

84.2

%

86.8

%

(2.6)

%

16.17

16.36

(1.2)

%

Houston-Pasadena-The Woodlands, TX

18,421

2,762,756

85.8

%

90.1

%

(4.3)

%

86.1

%

89.6

%

(3.5)

%

13.37

12.71

5.2

%

Atlanta-Sandy Springs-Roswell, GA

14,207

1,986,675

82.3

%

82.9

%

(0.6)

%

80.5

%

82.3

%

(1.8)

%

13.01

13.97

(6.9)

%

Dallas-Fort Worth-Arlington, TX

12,847

1,672,270

80.5

%

81.9

%

(1.4)

%

80.1

%

84.0

%

(3.9)

%

14.03

14.16

(0.9)

%

Phoenix-Mesa-Chandler, AZ

15,239

1,705,135

78.6

%

82.5

%

(3.9)

%

79.9

%

83.5

%

(3.6)

%

15.82

16.30

(2.9)

%

McAllen-Edinburg-Mission, TX

9,848

1,467,078

89.2

%

89.1

%

0.1

%

88.3

%

90.0

%

(1.7)

%

13.36

13.56

(1.5)

%

Oklahoma City, OK

9,180

1,327,602

82.6

%

86.2

%

(3.6)

%

82.1

%

87.1

%

(5.0)

%

11.33

10.99

3.1

%

Brownsville-Harlingen, TX

6,536

940,371

89.3

%

89.2

%

0.1

%

88.2

%

89.6

%

(1.4)

%

13.16

13.20

(0.3)

%

San Antonio-New Braunfels, TX

6,491

835,115

83.5

%

83.8

%

(0.3)

%

82.4

%

83.3

%

(0.9)

%

15.03

15.46

(2.8)

%

North Port-Bradenton-Sarasota, FL

9,402

959,833

84.9

%

86.3

%

(1.4)

%

86.3

%

84.8

%

1.5

%

19.57

21.13

(7.4)

%

San Juan-Bayamón-Caguas, PR

12,854

1,379,277

89.2

%

91.2

%

(2.0)

%

89.5

%

91.8

%

(2.3)

%

30.56

29.11

5.0

%

Los Angeles-Long Beach-Anaheim, CA

9,749

1,063,694

84.0

%

86.6

%

(2.6)

%

83.8

%

86.9

%

(3.1)

%

25.05

24.87

0.7

%

Colorado Springs, CO

5,633

707,710

87.8

%

85.6

%

2.2

%

84.5

%

86.0

%

(1.5)

%

13.50

13.61

(0.8)

%

Orlando-Kissimmee-Sanford, FL

8,070

950,696

82.9

%

88.5

%

(5.6)

%

83.3

%

90.1

%

(6.8)

%

15.34

14.85

3.3

%

Tulsa, OK

6,112

812,154

81.5

%

85.0

%

(3.5)

%

81.9

%

86.2

%

(4.3)

%

11.31

11.27

0.4

%

Las Vegas-Henderson-North Las Vegas, NV

7,080

880,970

84.1

%

85.7

%

(1.6)

%

87.8

%

86.7

%

1.1

%

14.12

14.75

(4.3)

%

Shreveport-Bossier City, LA

5,102

669,571

81.3

%

82.1

%

(0.8)

%

80.4

%

84.4

%

(4.0)

%

10.65

10.56

0.9

%

Austin-Round Rock-San Marcos, TX

6,855

917,244

83.6

%

84.3

%

(0.7)

%

83.0

%

84.8

%

(1.8)

%

16.40

16.94

(3.2)

%

Wichita, KS

4,198

586,931

89.7

%

86.6

%

3.1

%

87.7

%

87.4

%

0.3

%

13.03

12.94

0.7

%

Bend, OR

3,937

570,674

90.8

%

89.0

%

1.8

%

88.6

%

87.8

%

0.8

%

15.38

15.85

(3.0)

%

Other MSAs

165,028

20,715,145

84.2

%

84.8

%

(0.6)

%

84.0

%

85.4

%

(1.4)

%

15.26

15.45

(1.2)

%

Total/Weighted Average

386,012

49,276,623

84.5

%

85.9

%

(1.4)

%

84.4

%

86.2

%

(1.8)

%

$

15.68

$

15.78

(0.6)

%

2024 Same Store Pool (2)

371,569

47,560,078

84.6

%

85.9

%

(1.3)

%

84.4

%

86.3

%

(1.9)

%

$

15.71

$

15.83

(0.7)

%

2023 Same Store Pool (3)

344,886

44,257,563

84.5

%

86.0

%

(1.5)

%

84.4

%

86.4

%

(2.0)

%

$

15.77

$

15.89

(0.7)

%

(1)

MSA (Metropolitan Statistical Area) as defined by the United States Census Bureau.

(2)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2024.

(3)

Represents the subset of properties included in the 2025 same store pool that were in NSA's same store pool reported in 2023.

20

Supplemental Schedule 7

Same Store Operating Data (771 Stores) - Trailing Five Quarters

(dollars in thousands, except per square foot data) (unaudited)

3Q 2025

2Q 2025

1Q 2025

4Q 2024

3Q 2024

YTD 2025

YTD 2024

Revenue

Rental revenue

$

164,069

$

162,570

$

162,224

$

164,207

$

167,820

$

488,863

$

503,265

Other property-related revenue

6,181

6,405

6,433

6,380

7,028

19,019

19,554

Total revenue

170,250

168,975

168,657

170,587

174,848

507,882

522,819

Property operating expenses

Store payroll and related costs

12,376

12,429

12,182

12,076

12,103

36,987

37,895

Property tax expense

15,299

15,170

15,116

14,630

14,338

45,585

42,757

Utilities expense

6,146

4,935

5,470

4,844

5,699

16,551

15,152

Repairs & maintenance expense

3,672

4,487

4,771

3,557

3,674

12,930

11,711

Marketing expense

5,746

6,560

5,224

4,436

4,446

17,530

13,517

Insurance expense

2,328

2,323

2,489

2,645

2,557

7,140

7,699

Other property operating expenses

7,263

6,816

6,993

7,492

7,545

21,072

22,441

Total property operating expenses

52,830

52,720

52,245

49,680

50,362

157,795

151,172

Net operating income

$

117,420

$

116,255

$

116,412

$

120,907

$

124,486

$

350,087

$

371,647

Net operating income margin

69.0

%

68.8

%

69.0

%

70.9

%

71.2

%

68.9

%

71.1

%

Occupancy at period end

84.5

%

85.0

%

83.6

%

84.7

%

85.9

%

84.5

%

85.9

%

Average occupancy

85.0

%

84.2

%

83.9

%

85.5

%

86.5

%

84.4

%

86.2

%

Average annualized rental revenue (includes fees and net of any discounts and uncollectible customer amounts) per occupied square foot

$

15.67

$

15.68

$

15.70

$

15.60

$

15.73

$

15.68

$

15.78

Average annual contract storage rent per square foot

In-place customers

$

14.71

$

14.72

$

14.64

$

14.50

$

14.68

$

14.69

$

14.78

Move-ins

$

10.07

$

10.30

$

9.89

$

9.08

$

9.60

$

10.10

$

10.02

Move-outs

$

13.32

$

13.37

$

13.22

$

13.39

$

13.65

$

13.31

$

13.83

21

Supplemental Schedule 8

Reconciliation of Same Store Data and Net Operating Income to Net Income

(dollars in thousands) (unaudited)

3Q 2025

2Q 2025

1Q 2025

4Q 2024

3Q 2024

YTD 2025

YTD 2024

Rental revenue

Same store portfolio

$

164,069

$

162,570

$

162,224

$

164,207

$

167,820

$

488,863

$

503,265

Non-same store portfolio

5,838

7,268

7,251

6,822

6,647

20,357

25,953

Total rental revenue

169,907

169,838

169,475

171,029

174,467

509,220

529,218

Other property-related revenue

Same store portfolio

6,181

6,405

6,433

6,380

7,028

19,019

19,554

Non-same store portfolio

278

369

311

328

377

958

1,100

Total other property-related revenue

6,459

6,774

6,744

6,708

7,405

19,977

20,654

Property operating expenses

Same store portfolio

52,830

52,720

52,245

49,680

50,362

157,795

151,172

Non-same store portfolio

2,517

2,907

2,859

2,696

2,641

8,283

9,747

Prior period comparability adjustment (1)

—

—

—

(131)

(291)

—

(1,312)

Total property operating expenses

55,347

55,627

55,104

52,245

52,712

166,078

159,607

Net operating income

121,019

120,985

121,115

125,492

129,160

363,119

390,265

Management fees and other revenue

12,336

12,230

12,135

12,381

11,749

36,701

30,345

General and administrative expenses

(11,460)

(12,804)

(13,145)

(12,629)

(13,114)

(37,409)

(44,977)

Depreciation and amortization

(46,885)

(47,612)

(48,116)

(48,153)

(47,661)

(142,613)

(141,702)

Other

(4,101)

(4,500)

(4,476)

(3,356)

(3,643)

(13,077)

(10,510)

Interest expense

(40,549)

(41,269)

(40,475)

(39,340)

(39,575)

(122,293)

(114,920)

Loss on early extinguishment of debt

—

—

—

—

(323)

—

(323)

Equity in earnings (losses) of unconsolidated real estate ventures

463

(3,945)

(5,739)

(5,284)

(4,712)

(9,221)

(10,791)

Acquisition and integration costs

(1,439)

(2,040)

(2,445)

(1,465)

(1,164)

(5,924)

(2,151)

Non-operating income (expense)

503

462

360

(38)

(83)

1,325

352

Gain on sale of self storage properties

—

9,571

1,425

—

—

10,996

63,841

Income tax expense

(871)

(120)

(1,120)

(1,477)

(863)

(2,111)

(2,290)

Net Income

$

29,016

$

30,958

$

19,519

$

26,131

$

29,771

$

79,493

$

157,139

(1)

Certain payroll and related costs associated with the former PRO portfolios were not reflected as property-level expenses in 2024 under the management of the former PROs. Such costs are reflected in property operating expenses in 2025 under our management. For purposes of comparable same store reporting, we have included the specific 2024 expense amounts for the same store portfolio in the relevant periods. This line item is presented in order to reconcile total property operating expenses to previously reported figures.

22

Supplemental Schedule 9

Selected Financial Information

(dollars in thousands, except per square foot data) (unaudited)

Three Months Ended September 30,

Nine Months Ended September 30,

2025

2024

2025

2024

Average Annualized Rental Revenue Per Occupied Square Foot

Same store

$

15.67

$

15.73

$

15.68

$

15.78

Total consolidated portfolio

15.59

15.57

15.61

15.64

Average Occupancy

Same store

85.0

%

86.5

%

84.4

%

86.2

%

Total consolidated portfolio

84.5

%

86.0

%

83.8

%

85.8

%

Total Consolidated Portfolio Capital Expenditures

Recurring capital expenditures

$

6,956

$

3,391

$

15,657

$

9,187

Value enhancing capital expenditures

7,802

503

9,729

2,675

Acquisitions capital expenditures

177

62

1,219

1,611

Total consolidated portfolio capital expenditures

$

14,935

$

3,956

$

26,605

$

13,473

Property Operating Expenses Detail

Store payroll and related costs

$

13,012

$

12,487

$

39,133

$

38,975

Property tax expense

15,983

15,042

47,818

45,475

Utilities expense

6,450

5,990

17,418

16,220

Repairs & maintenance expense

3,854

3,835

13,565

12,359

Marketing expense

5,986

4,715

18,376

14,432

Insurance expense

2,488

2,732

7,682

8,311

Other property operating expenses

7,574

7,911

22,086

23,835

Property operating expenses on the Company's statements of operations

$

55,347

$

52,712

$

166,078

$

159,607

General and Administrative Expenses Detail

Supervisory and administrative expenses

$

1,198

$

3,418

$

4,027

$

13,567

Equity-based compensation expense

1,975

1,911

5,955

6,097

Other general and administrative expenses

8,287

7,785

27,427

25,313

General and administrative expenses on the Company's statements of operations

$

11,460

$

13,114

$

37,409

$

44,977

23

Glossary

This Earnings Release and Supplemental Financial Information includes certain financial and operating measures used by NSA management that are not calculated in accordance with accounting principles generally accepted in the United States, or GAAP. NSA's definitions and calculations of these non-GAAP financial and operating measures and other terms may differ from the definitions and methodologies used by other real estate companies and, accordingly, may not be comparable. These non-GAAP financial and operating measures should not be considered an alternative to GAAP net income or any other GAAP measurement of performance and should not be considered an alternative measure of liquidity.

AVERAGE ANNUALIZED RENTAL REVENUE PER OCCUPIED SQUARE FOOT: Average annualized rental revenue per occupied square foot is computed by dividing annualized rental revenue (including fees and net of any discounts and uncollectible customer amounts) by average occupied square feet.

AVERAGE OCCUPANCY: Average occupancy is calculated based on the average of the month-end occupancy immediately preceding the period presented and the month-end occupancies included in the respective period presented.

CAPITAL EXPENDITURES DEFINITIONS

ACQUISITIONS CAPITAL EXPENDITURES: Acquisitions capital expenditures represents the portion of capital expenditures capitalized during the current period that were identified and underwritten prior to a property's acquisition.

RECURRING CAPITAL EXPENDITURES: Recurring capital expenditures represents the portion of capital expenditures that are deemed to replace the consumed portion of acquired capital assets and extend their useful lives.

VALUE ENHANCING CAPITAL EXPENDITURES: Value enhancing capital expenditures represents the portion of capital expenditures that are made to enhance the revenue and value of an asset from its original purchase condition.

EBITDA: NSA defines EBITDA as net income (loss), as determined under GAAP, plus interest expense, loss on early extinguishment of debt, income taxes, depreciation and amortization expense and the Company's share of unconsolidated real estate venture depreciation and amortization. NSA defines ADJUSTED EBITDA as EBITDA plus acquisition costs, integration costs, executive severance costs, equity-based compensation expense, losses on sale of properties, impairment of long-lived assets and casualty-related expenses, losses and recoveries, minus gains on sale of properties and debt forgiveness, and after adjustments for unconsolidated partnerships and joint ventures, including the removal of the non-cash effect of applying hypothetical liquidation at book value (HLBV) for purposes of allocating GAAP net income (loss) for the 2024 Joint Venture. These further adjustments eliminate the impact of items that the Company does not consider indicative of its core operating performance. In evaluating EBITDA and Adjusted EBITDA, you should be aware that in the future the Company may incur expenses that are the same as or similar to some of the adjustments in this presentation. NSA's presentation of EBITDA and Adjusted EBITDA should not be construed as an inference that its future results will be unaffected by unusual or non-recurring items.

NSA presents EBITDA and Adjusted EBITDA because the Company believes they assist investors and analysts in comparing the Company's performance across reporting periods on a consistent basis by excluding items that the Company does not believe are indicative of its core operating performance. EBITDA and Adjusted EBITDA have limitations as an analytical tool. Some of these limitations are:

• EBITDA and Adjusted EBITDA do not reflect the Company's cash expenditures, or future requirements, for capital expenditures, contractual commitments or working capital needs;

• EBITDA and Adjusted EBITDA do not reflect the significant interest expense, or the cash requirements necessary to service interest or principal payments, on the Company's debts;

• although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the future, and EBITDA and Adjusted EBITDA do not reflect any cash requirements for such replacements;

• Adjusted EBITDA excludes equity-based compensation expense, which is and will remain a key element of the Company's overall long-term incentive compensation package, although the Company excludes it as an expense when evaluating its ongoing operating performance for a particular period;

24

• EBITDA and Adjusted EBITDA do not reflect the impact of certain cash charges resulting from matters the Company considers not to be indicative of its ongoing operations; and

• other companies in NSA's industry may calculate EBITDA and Adjusted EBITDA differently than NSA does, limiting their usefulness as comparative measures.

NSA compensates for these limitations by considering the economic effect of the excluded expense items independently as well as in connection with the Company's analysis of net income (loss). EBITDA and Adjusted EBITDA should be considered in addition to, but not as a substitute for, other measures of financial performance reported in accordance with GAAP, such as total revenues and net income (loss).

FUNDS FROM OPERATIONS: Funds from operations, or FFO, is a widely used performance measure for real estate companies and is provided here as a supplemental measure of the Company's operating performance. The December 2018 Nareit Funds From Operations White Paper - 2018 Restatement defines FFO as net income (as determined under GAAP), excluding: real estate depreciation and amortization, gains and losses from the sale of certain real estate assets, gains and losses from change in control, mark-to-market changes in value recognized on equity securities, impairment write-downs of certain real estate assets and impairment of investments in entities when it is directly attributable to decreases in the value of depreciable real estate held by the entity, and after adjusting equity in earnings (losses) to reflect the Company's share of FFO in unconsolidated real estate ventures. Distributions declared on subordinated performance units and DownREIT subordinated performance units represent NSA's allocation of FFO to noncontrolling interests held by subordinated performance unitholders and DownREIT subordinated performance unitholders. For purposes of calculating FFO attributable to common shareholders, OP unitholders, and LTIP unitholders, NSA excludes distributions declared on preferred shares and preferred units, and, prior to the internalization of the PRO structure, subordinated performance units and DownREIT subordinated performance units. NSA defines CORE FFO as FFO, as further adjusted to eliminate the impact of certain items that the Company does not consider indicative of its core operating performance. These further adjustments consist of acquisition costs, integration costs, executive severance costs, gains on debt forgiveness, gains (losses) on early extinguishment of debt, casualty-related expenses, losses and related recoveries, and after adjustments for unconsolidated partnerships and joint ventures.

Management uses FFO and Core FFO as key performance indicators in evaluating the operations of NSA's properties. Given the nature of NSA's business as a real estate owner and operator, the Company considers FFO and Core FFO as key supplemental measures of its operating performance that are not specifically defined by GAAP. NSA believes that FFO and Core FFO are useful to management and investors as a starting point in measuring the Company's operational performance because FFO and Core FFO exclude various items included in net income (loss) that do not relate to or are not indicative of the Company's operating performance such as gains (or losses) from sales of self storage properties and depreciation, which can make periodic and peer analyses of operating performance more difficult. NSA's computation of FFO and Core FFO may not be comparable to FFO reported by other REITs or real estate companies.

FFO and Core FFO should be considered in addition to, but not as a substitute for, other measures of financial performance reported in accordance with GAAP, such as total revenues, operating income and net income (loss). FFO and Core FFO do not represent cash generated from operating activities determined in accordance with GAAP and are not a measure of liquidity or an indicator of NSA's ability to make cash distributions. NSA believes that to further understand the Company's performance, FFO and Core FFO should be compared with the Company's reported net income (loss) and considered in addition to cash flows computed in accordance with GAAP, as presented in the Company's consolidated financial statements.

HYPOTHETICAL LIQUIDATION AT BOOK VALUE METHOD OF UNCONSOLIDATED REAL ESTATE VENTURE: Subject to achieving certain performance benchmarks by the non-NSA investor, the distribution rights and priorities set forth in the 2024 Joint Venture agreement may differ from what is reflected by the underlying percentage ownership interest of the venture. Accordingly , NSA allocates GAAP income (loss) for its 2024 Joint Venture utilizing the hypothetical liquidation at book value ("HLBV") method, in which NSA allocates income or loss based on the change in each owners' claim on the net assets of the venture at period end assuming the liquidation of the underlying book value of the venture after adjusting for any distributions or contributions made during such period.

NET DEBT TO ANNUALIZED CURRENT QUARTER ADJUSTED EBITDA: NSA calculates net debt to Adjusted EBITDA as debt financing less cash and cash equivalents (both as reflected on the consolidated balance sheet), divided by annualized current quarter Adjusted EBITDA.

NET OPERATING INCOME:  Net operating income, or NOI, represents rental revenue plus other property-related revenue less property operating expenses. NOI is not a measure of performance calculated in accordance with GAAP.

25

NSA believes NOI is useful to investors in evaluating the Company's operating performance because:

• NOI is one of the primary measures used by NSA's management to evaluate the economic productivity of the Company's properties, including the Company's ability to lease its properties, increase pricing and occupancy and control the Company's property operating expenses;

• NOI is widely used in the real estate industry and the self storage industry to measure the performance and value of real estate assets without regard to various items included in net income that do not relate to or are not indicative of operating performance, such as depreciation and amortization, which can vary depending upon accounting methods, the book value of assets, and the impact of NSA's capital structure; and

• NSA believes NOI helps the Company's investors to meaningfully compare the results of its operating performance from period to period by removing the impact of the Company's capital structure (primarily interest expense on the Company's outstanding indebtedness) and depreciation of the cost basis of NSA's assets from its operating results.

There are material limitations to using a non-GAAP measure such as NOI, including the difficulty associated with comparing results among more than one company and the inability to analyze certain significant items, including depreciation and interest expense, that directly affect the Company's net income (loss). NSA compensates for these limitations by considering the economic effect of the excluded expense items independently as well as in connection with the Company's analysis of net income (loss). NOI should be considered in addition to, but not as a substitute for, other measures of financial performance reported in accordance with GAAP, such as total revenues and net income (loss).

NON-SAME STORE PORTFOLIO: Non-same store portfolio comprises those properties that do not meet the Same Store portfolio property definition.

OPERATING PARTNERSHIP UNITS:  Operating partnership units, or OP Units, are Class A common units of limited partner interest in the Company's operating partnership which are economically equivalent to NSA's common shares. NSA also owns certain of the Company's self storage properties through other consolidated subsidiaries of the Company's operating partnership, which the Company refers to as "DownREIT partnerships." The DownREIT partnerships issue certain units of limited partner or limited liability company interest that are intended to be economically equivalent to the Company's OP units, which the Company defines as DOWNREIT OPERATING PARTNERSHIP UNIT EQUIVALENTS , or DownREIT OP units.

PROs: Participating regional operators, or "PROs", were NSA's experienced regional self storage operators with local operational focus and expertise. Effective July 1, 2024, in connection with the internalization of its PRO structure, the Company purchased the PROs' management contracts. As of September 30, 2025, the majority of operations have transitioned to the Company.

RENTABLE SQUARE FEET: Rentable square feet includes all enclosed self storage units but excludes commercial, residential, and covered parking space.

SAME STORE PORTFOLIO: NSA's same store portfolio is defined as those properties owned and operated on a stabilized basis since the first day of the earliest year presented. The Company considers a property to be stabilized once it has achieved an occupancy rate that is representative of similar properties in the applicable market. NSA excludes any properties sold, expected to be sold or subject to significant changes such as expansions or casualty events which cause the portfolio's year-over-year operating results to no longer be comparable.

SUBORDINATED PERFORMANCE UNITS:  Subordinated performance units, or SP Units, were Class B common units of limited partner interest in the Company's operating partnership. SP units, which were linked to the performance of specific contributed portfolios, were intended to incentivize the Company's former PROs to drive operating performance and support the sustainability of the operating cash flow generated by the contributed self storage properties that the PROs continued to manage on NSA's behalf. Because subordinated performance unit holders received distributions only after portfolio-specific minimum performance thresholds were satisfied, the Company believed SP units played a key role in aligning the interests of the Company's former PROs with NSA and the Company's shareholders. The DownREIT partnerships also issued units of limited partner interest that were intended to be economically equivalent to the Company's SP units, which the Company defines as DOWNREIT SUBORDINATED PERFORMANCE UNIT EQUIVALENTS , or DownREIT SP units. Effective July 1, 2024, in connection with the internalization of the PRO structure, all 11,906,167 outstanding subordinated performance units and DownREIT subordinated performance units were converted into an aggregate of 17,984,787 OP units and DownREIT OP units.

26

Equity Research Coverage

Barclays

BMO Capital Markets

BNP Paribas Exane

Brendan Lynch

Juan Sanabria

John Paul Flangos

212.526.9428

312.845.4074

646.342.5660

BofA Global Research

Citi Investment Research

Deutsche Bank

Samir Khanal

Eric Wolfe

Omotayo Okusanya

646.855.1497

212.816.2640

212.250.9284

Evercore ISI

Green Street

Jefferies

Steve Sakwa

Spenser Glimcher

Jonathan Petersen

212.446.9462

949.640.8780

212.284.1705

KeyBanc Capital Markets

Mizuho Securities

Morgan Stanley

Todd Thomas

Ravi Vaidya

Ronald Kamdem

917.368.2286

212.282.4347

212.296.8319

RW Baird

Truist Securities

UBS

Wes Golladay

Michael Lewis

Michael Goldsmith

216.737.7510

212.319.5659

212.713.2951

Wells Fargo

Wolfe Research

Eric Luebchow

Andrew Rosivach

312.630.2386

646.582.9250

27

Item 9.01 - Financial Statements and Exhibits

61 words

ITEM 9.01.         Financial Statements and Exhibits.

The following exhibits are furnished with this report:

Exhibit Number

Description

99.1

Third Quarter 2025 Earnings Release dated November 3, 2025

101

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

104

The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.