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  4. [Form 4] Global Self Storage, Inc. Insider Trading Activity

Global Self Storage (NASDAQ: SELF) insider adds August share stake

Filing Impact
(Neutral)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

Global Self Storage, Inc. (SELF) reported an increase in insider-related ownership through WINMILL & CO. INC, which may be deemed an affiliate of the company. WINMILL & CO. INC purchased a total of 15,139 shares of common stock in open-market or private transactions on August 21 and August 24, 2026.

Positive

  • None.

Negative

  • None.
Insider WINMILL & CO. INC
Role Insider
Bought 15,139 shs ($84K)
Type Security Shares Price Value
Purchase Common Stock 8,022 $5.6153 $45K
Purchase Common Stock 7,117 $5.4525 $39K
Holdings After Transaction: Common Stock — 213,204 shares (Direct)
Shares purchased (August 24, 2026) 8,022 shares Common Stock purchased by WINMILL & Co. Inc. at $5.6153 per share
Price per share (August 24, 2026) $5.6153 per share Purchase price for 8,022 shares of Common Stock
Shares purchased (August 21, 2026) 7,117 shares Common Stock purchased by WINMILL & Co. Inc. at $5.4525 per share
Price per share (August 21, 2026) $5.4525 per share Purchase price for 7,117 shares of Common Stock
Total shares bought 15,139 shares Aggregate net buying across both reported transactions
affiliate regulatory
"The Reporting Person may be deemed to be an affiliate of the Issuer."
indirect beneficial ownership regulatory
"may be deemed to have indirect beneficial ownership of the Reporting Person's shares"
disclaims beneficial ownership regulatory
"the Winmill Family Trust disclaims beneficial ownership of these shares."
Common Stock financial
"security_title": "Common Stock""
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

What insider transactions were reported for SELF in this Form 4?
WINMILL & CO. INC reported two open-market or private purchases of Global Self Storage, Inc. common stock, totaling 15,139 shares on August 21 and August 24, 2026.

How many SELF shares did WINMILL & CO. INC buy on August 24, 2026?
On August 24, 2026, WINMILL & CO. INC purchased 8,022 shares of Global Self Storage, Inc. common stock at a price of $5.6153 per share.

How many SELF shares did WINMILL & CO. INC buy on August 21, 2026?
On August 21, 2026, WINMILL & CO. INC purchased 7,117 shares of Global Self Storage, Inc. common stock at a price of $5.4525 per share.

Were the SELF insider transactions net buying or selling activity?
The reported activity was net buying. WINMILL & CO. INC bought 15,139 shares and reported no sales, gifts, or derivative exercises in this Form 4.

Who may have indirect beneficial ownership of the SELF shares held by WINMILL & CO. INC?
The Winmill Family Trust owns all voting stock of WINMILL & CO. INC. Thomas B. Winmill, Mark C. Winmill, William Winmill, and Woodworth Winmill may be deemed to have indirect beneficial ownership, though each disclaims beneficial ownership of these shares.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
WINMILL & CO. INC
(Last)(First)(Middle)
17 OLD DREWSVILLE RD
(Street)
WALPOLE NEW HAMPSHIRE 03608
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Global Self Storage, Inc. [ SELF ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
Officer (give title below)XOther (specify below)
See "Explanation of Responses"
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/21/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/21/2026P7,117A$5.4525205,182D
Common Stock08/24/2026P8,022A$5.6153213,204D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
Remarks:
The Reporting Person may be deemed to be an affiliate of the Issuer. The Winmill Family Trust owns all of the voting stock of the Reporting Person. Thomas B. Winmill, Mark C. Winmill, William Winmill, and Woodworth Winmill are trustees of the Winmill Family Trust and may be deemed to have indirect beneficial ownership of the Reporting Person's shares as a result of their status as controlling persons of the Winmill Family Trust and the Reporting Person. Each of Thomas B. Winmill, Mark C. Winmill, William Winmill, Woodworth Winmill, and the Winmill Family Trust disclaims beneficial ownership of these shares.
Donald Klimoski, on behalf of Winmill & Co. Incorporated08/24/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR