Form S-8 Global Self Storage,

As filed with the Securities and Exchange Commission on June 29, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Global Self Storage, Inc.

(Exact name of registrant as specified in its charter)

(Address of Principal Executive Offices) (Zip Code)

GLOBAL SELF STORAGE, INC. AMENDED AND RESTATED 2017 EQUITY INCENTIVE PLAN

(Full Title of the Plan)

(212) 785-0900

(Telephone number, including area code, of agent for service)

Donald Klimoski II, Esq.

 Senior Vice President – Operations, General Counsel, Secretary and Chief Compliance Officer

Global Self Storage, Inc.

3814 Route 44

Millbrook, New York 12545

Copy to:

Jason D. Myers, Esq.

Robert Matthew Worden, Esq.

Clifford Chance US LLP

Two Manhattan West

375 9th Ave

New York, New York 10001

(212) 878-8000

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 financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

EXPLANATORY NOTE

At the 2026 Annual Meeting of Stockholders of Global Self Storage, Inc., a Maryland corporation (the “Company”), held on June 16, 2026, the stockholders of the Company approved the Global Self Storage, Inc. Amended and Restated 2017 Equity Incentive Plan (the “Amended Plan”), which is an amendment and restatement of the 2017 Global Self Storage, Inc. Equity Incentive Plan (the “Plan”). The Amended Plan provides for grants of equity-based awards up to an aggregate of 1,000,000 shares of common stock, $0.01 par value per share, of the Company (“common stock”).

The Company previously registered shares of common stock for issuance under the Plan pursuant to a Registration Statements on Form S-8, File Nos. 333-223991 filed with the Securities and Exchange Commission (the “SEC”) on March 28, 2018 (the “Prior Registration Statement”). The Company is filing this Registration Statement on Form S-8 to register 1,000,000 shares of common stock available for issuance under the Amended Plan.

In accordance with General Instruction E of Form S-8, the contents of the Prior Registration Statement are hereby incorporated by reference in this Registration Statement on Form S-8, except to the extent supplemented, amended or superseded by the information set forth herein.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

The following documents filed by Global Self Storage, Inc., a Maryland corporation (the “Company”), with the Securities and Exchange Commission (the “SEC”) are incorporated by reference in this Registration Statement:

In addition, all documents filed by the Company pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), subsequent to the filing of this Registration Statement and prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which de-registers all securities then remaining unsold shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of filing such documents, except as to specific sections of such statements as set forth therein.

Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is incorporated or deemed to be incorporated by reference herein modifies or supersedes such statement. Any statement contained herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained in any subsequently filed document which also is incorporated or deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

See Index to Exhibits, which is incorporated herein by reference.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of Millbrook, the State of New York, on this June 29, 2026.

GLOBAL SELF STORAGE, INC.

By:	/s/ Mark C. Winmill
	Name: Mark C. Winmill
	Title: Chief Executive Officer, President, and Chairman of the Board of Directors

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Mark C. Winmill, Donald Klimoski II and Russell Kamerman, and each of them, with full power to act without the other, such person’s true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign this Registration Statement, and any and all amendments thereto (including post-effective amendments), and to file the same, with exhibits and schedules thereto, and other documents in connection therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing necessary or desirable to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.

EXHIBIT INDEX