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

Global Self Storage, Inc. (SELF) insider report shows Winmill & Co. Inc. purchased common stock in two transactions: 7,823 shares on 08/25/2025 at $5.2198 and 7,788 shares on 08/26/2025 at $5.2611.

Rhea-AI Filing Summary

Global Self Storage, Inc. (SELF) insider report shows Winmill & Co. Inc. purchased common stock in two transactions: 7,823 shares on 08/25/2025 at $5.2198 and 7,788 shares on 08/26/2025 at $5.2611. After the first trade Winmill held 50,668 shares and after the second 58,456 shares. The filer is an officer and may be an affiliate; the filing discloses indirect ownership links through the Winmill Family Trust.

Insights

Financial Analyst

TL;DR: Insider purchases totaling 15,611 shares increased Winmill's stake to 58,456 shares; transactions appear routine, not transformational.

The purchases on consecutive days at roughly $5.22–$5.26 per share represent modest additions to the reporting person's position. No derivative transactions or dispositions are reported. For investors, these are informational signals about insider buying but do not by themselves indicate a material change to company control or capital structure.

Corporate Governance Expert

TL;DR: Filing is procedural: an officer-affiliate made open-market acquisitions and disclosed potential indirect ownership via a family trust.

The statement clarifies that the Winmill Family Trust controls the reporting entity and that multiple trustees may have indirect interests, while disclaiming beneficial ownership. Disclosure of affiliate status and the trust relationship is appropriate governance transparency and aligns with Section 16 reporting expectations.

Insider Trade Summary

Net Buyer: 15,611 shares

Net Buy 2 txns

Insider WINMILL & CO. INC

Role Insider

Bought 15,611 shs ($82K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	7,788	$5.2611	$41K
Purchase	Common Stock	7,823	$5.2198	$41K

Holdings After Transaction: Common Stock — 58,456 shares (Direct)

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

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Accepted by SEC EDGAR 08/26/2025 - 04:14 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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)

2255 BUFFALO ROAD

(Street)

ROCHESTER NY 14624

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Global Self Storage, Inc. [ SELF ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			See "Explanation of Responses"

3. Date of Earliest Transaction (Month/Day/Year)
08/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/25/2025		P		7,823	A	$5.2198	50,668	D
Common Stock	08/26/2025		P		7,788	A	$5.2611	58,456	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount 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 II, on behalf of Winmill & Co. Incorporated	08/26/2025
	** Signature of Reporting Person	Date
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.