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

Global Self Storage (SELF): Winmill & Co. reports open-market stock purchases

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

Rhea-AI Filing Summary

Winmill & Co. Inc., which may be deemed an affiliate of Global Self Storage, Inc., reported open-market purchases of the company’s common stock. It bought 6,248 shares at $5.1524 per share on August 12, 2026 and 5,887 shares at $5.1655 per share on August 11, 2026, for total reported purchases of 12,135 shares. The Winmill Family Trust owns all of Winmill & Co. Inc.’s voting stock, and related individuals and the trust disclaim beneficial ownership of these shares.

Positive

  • None.

Negative

  • None.
Insider WINMILL & CO. INC
Role Insider
Bought 12,135 shs ($63K)
Type Security Shares Price Value
Purchase Common Stock 6,248 $5.1524 $32K
Purchase Common Stock 5,887 $5.1655 $30K
Holdings After Transaction: Common Stock — 159,776 shares (Direct)
Shares purchased 2026-08-12 6,248 shares at $5.1524 per share Common Stock purchase by Winmill & Co. Inc on August 12, 2026
Shares purchased 2026-08-11 5,887 shares at $5.1655 per share Common Stock purchase by Winmill & Co. Inc on August 11, 2026
Total shares bought 12,135 shares Net common stock purchases reported across both transactions
affiliate of the Issuer regulatory
"The Reporting Person may be deemed to be an affiliate of the Issuer."
indirect beneficial ownership financial
"may be deemed to have indirect beneficial ownership of the Reporting Person's shares"
voting stock financial
"The Winmill Family Trust owns all of the voting stock of the Reporting Person."
disclaims beneficial ownership regulatory
"the Winmill Family Trust disclaims beneficial ownership of these shares."

FAQ

What insider transactions did Winmill & Co. Inc report for Global Self Storage (SELF)?
Winmill & Co. Inc reported two open-market purchases of Global Self Storage common stock totaling 12,135 shares on August 11 and 12, 2026, at prices just above $5.15 per share.

How many SELF shares did Winmill & Co. Inc buy on August 12, 2026?
On August 12, 2026, Winmill & Co. Inc purchased 6,248 shares of Global Self Storage common stock at a price of $5.1524 per share in an open-market or private transaction.

How many SELF shares did Winmill & Co. Inc buy on August 11, 2026?
On August 11, 2026, Winmill & Co. Inc purchased 5,887 shares of Global Self Storage common stock at a price of $5.1655 per share, reported as a purchase in an open-market or private transaction.

What is the total number of SELF shares Winmill & Co. Inc bought in this Form 4?
Across both reported transactions, Winmill & Co. Inc bought 12,135 shares of Global Self Storage common stock, consisting of 6,248 shares on August 12, 2026 and 5,887 shares on August 11, 2026.

Were the SELF insider purchases by Winmill & Co. Inc made under a Rule 10b5-1 plan?
The filing’s Rule 10b5-1 checkbox is not marked as using a plan (aff_10b5_one is false), and no footnote indicates that these Global Self Storage share purchases were made under a pre-arranged trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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)
08/11/2026		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 Stock08/11/2026P5,887A$5.1655153,528D
Common Stock08/12/2026P6,248A$5.1524159,776D
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. Incorporated08/12/2026
** 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