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

Global Self Storage (SELF) affiliate makes open-market buys

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

Rhea-AI Filing Summary

Global Self Storage, Inc. (SELF) reported that Winmill & Co. Inc., which may be deemed an affiliate of the company, purchased shares of its Common Stock in the open market. Winmill & Co. bought 6,877 shares at $5.4039 per share on 2026-08-19 and 6,901 shares at $5.4219 per share on 2026-08-20, for a total of 13,778 shares. The Winmill Family Trust controls Winmill & Co., and its trustees disclaim beneficial ownership of these shares.

Positive

  • None.

Negative

  • None.
Insider WINMILL & CO. INC
Role Insider
Bought 13,778 shs ($75K)
Type Security Shares Price Value
Purchase Common Stock 6,901 $5.4219 $37K
Purchase Common Stock 6,877 $5.4039 $37K
Holdings After Transaction: Common Stock — 198,065 shares (Direct)
Shares purchased on 2026-08-19 6,877 shares Open-market purchase of Global Self Storage, Inc. Common Stock
Price per share on 2026-08-19 $5.4039 per share Purchase price for 6,877 shares of Common Stock
Shares purchased on 2026-08-20 6,901 shares Open-market purchase of Global Self Storage, Inc. Common Stock
Price per share on 2026-08-20 $5.4219 per share Purchase price for 6,901 shares of Common Stock
Total shares purchased 13,778 shares Sum of reported open-market purchases of Common Stock
affiliate regulatory
"The Reporting Person may be deemed to be an affiliate of the Issuer."
indirect beneficial ownership financial
"trustees ... may be deemed to have indirect beneficial ownership of the Reporting Person's shares"
disclaims beneficial ownership regulatory
"each ... and the Winmill Family Trust disclaims beneficial ownership of these shares"

FAQ

What insider purchases were reported for SELF in this Form 4?
The filing reports that Winmill & Co. Inc. purchased a total of 13,778 shares of Global Self Storage, Inc. common stock in two open-market transactions on 2026-08-19 and 2026-08-20.

At what prices were the SELF shares purchased in this Form 4?
Winmill & Co. Inc. bought 6,877 shares at $5.4039 per share on 2026-08-19 and 6,901 shares at $5.4219 per share on 2026-08-20 in open-market transactions.

Who is the reporting person in this SELF Form 4 filing?
The reporting person is Winmill & Co. Inc. It may be deemed an affiliate of Global Self Storage, Inc., and it is owned and controlled through the Winmill Family Trust as described in the filing’s remarks.

Does this SELF Form 4 indicate trades under a Rule 10b5-1 plan?
No. The Rule 10b5-1 checkbox is not checked, so these purchases by Winmill & Co. Inc. are not reported as being made pursuant to a Rule 10b5-1 trading plan.

How many SELF shares in total did Winmill & Co. buy in this report?
Across both reported transactions, Winmill & Co. Inc. purchased 13,778 shares of Global Self Storage, Inc. common stock, all classified as direct ownership by the reporting person.

What does the Form 4 say about beneficial ownership of the SELF shares?
The filing states that the Winmill Family Trust owns all voting stock of Winmill & Co. Inc., and its trustees may be deemed to have indirect beneficial ownership, but each trustee and the trust 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)
08/19/2026		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 Stock08/19/2026P6,877A$5.4039191,164D
Common Stock08/20/2026P6,901A$5.4219198,065D
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. Incorporated08/20/2026
** 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