
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). YES☒NO☐Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financialaccounting standards provided pursuant to Section 13(a) of the Exchange Act.☐Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correctionof an error to previously issued financial statements.☐Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ The aggregate market value of the common stock held by non-affiliates of the registrant was $54,958,536 based upon the closing price of the shares on the Nasdaq Capital Marketon June 30, 2025, the last business day of the registrant’s most recently completed second fiscal quarter. This calculation does not reflect a determination that persons whose shares areexcluded from the computation are affiliates for any other purpose.The number of shares outstanding of the registrant’s Common Stock, $0.01 par value per share, as of March 16, 2026 was 11,340,552. DOCUMENTS INCORPORATED BY REFERENCEPortions of the registrant’s definitive proxy statement to be issued in connection with the registrant’s annual stockholders’ meeting to be held in 2026 are incorporated by referenceinto Part III of this Annual Report on Form 10-K. Table of Contents PART I Item 1.BusinessItem 1A.Risk FactorsItem 1B.Unresolved Staff CommentsItem 1C.CybersecurityItem 2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety Disclosures PART II Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of EquitySecurities33Item 6.[Reserved]33Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations34Item 7A.Quantitative and Qualitative Disclosures About Market Risk45Item 8.Financial Statements and Supplementary Data46Item 9.Changes in and Disagreements With Accountants on Accounting and Financial Disclosure46Item 9A.Controls and Procedures46Item 9B.Other Information47Item 9C.Disclosure Regarding Foreign Jurisdictions That Prevent Inspections47 PART III Item 10.Directors, Executive Officers and Corporate Governance48Item 11.Executive Compensation48Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters48Item 13.Certain Relationships and Related Transactions, and Director Independence48Item 14.Principal Accountant Fees and Services48 PART IV Certain information presented in this Annual Report on Form 10-K (this “annual report”) may contain “forward-lookingstatements” within the meaning of the federal securities laws, including the Private Securities Litigation Reform Act of 1995.Forward-looking statements include statements concerning Global Self Storage, Inc.'s (the "Company") plans, objectives, goals,strategies, future events, future revenues or performance, capital expenditures, financing needs, plans or intentions relating toacquisitions, and other information that is not historical information. In some cases, forward-looking statements can be identified byterminology such as “believes,” “plans,” “intends,” “expects,” “estimates,” “may,” “will,” “should,” or “anticipates,” or thenegative of such terms or other comparable terminology, or by discussions of strategy. All forward-looking statements made by theCompany involve known and unknown risks, uncertainties and other factors, many of which are beyond the control of theCompany, which may cause the Company’s actual results to be materially different from those expressed or implied by suchstatements. The Company may also make additional forward-looking statements from time to time. All such subsequent forward-looking statements, whether written or oral, by the Company or on its behalf, are also expressly qualified by these cautionarystatements. All forward-looking statements, including without l