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

Rhea-AI Filing Summary

Winmill & Co. Inc. reported an insider purchase of 4,592 shares of Global Self Storage, Inc. (ticker SELF) on 08/29/2025 at a price of $5.477 per share, increasing its total holdings to 75,734 shares. The filing notes that the reporting entity may be an affiliate of the issuer and describes indirect ownership connections through the Winmill Family Trust and its trustees, who disclaim beneficial ownership of these shares.

Positive

• Insider purchase disclosed: 4,592 shares acquired at $5.477, showing buying activity by a reporting person.
• Increased stake: Total beneficial holdings reported as 75,734 shares after the transaction.

Negative

• None.

Insights

Financial Analyst

TL;DR: An affiliate reported a modest open-market purchase of 4,592 SELF shares at $5.477, raising total holdings to 75,734 shares.

The transaction is a straightforward non-derivative purchase reported on Form 4. The size and price are explicitly stated in the filing, but without company market-cap or context the filing alone does not indicate material impact on valuation. The disclosure of potential affiliate status and the trustees who may have indirect interests is important for assessing control and voting influence.

Corporate Governance Expert

TL;DR: Filing documents an insider-affiliated purchase and clarifies indirect ownership via the Winmill Family Trust, with disclaimers of beneficial ownership.

The explanation reveals governance relationships: Winmill & Co. may be an affiliate and the Winmill Family Trust controls voting stock of the reporting entity. Trustees are named as potentially having indirect beneficial ownership but disclaim ownership. This disclosure is standard and relevant for understanding potential voting influence and related-party considerations.

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
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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)
08/29/2025

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	08/29/2025		P		4,592	A	$5.477	75,734	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	08/29/2025
	** 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.

FAQ

What transaction did Winmill & Co. report on Form 4 for SELF?

The Form 4 reports a purchase of 4,592 shares of Global Self Storage (SELF) on 08/29/2025 at $5.477 per share.

How many SELF shares does Winmill & Co. own after the reported transaction?

The filing states the reporting person owns 75,734 shares following the transaction.

Does the Form 4 disclose any indirect ownership or trust relationships?

Yes. The filing states the Winmill Family Trust owns all voting stock of the reporting person and names trustees who may be deemed to have indirect beneficial ownership, while disclaiming ownership.

Was the transaction in derivatives or common stock?

The reported transaction was in common stock (non-derivative).

Who signed the Form 4 and when?

The Form 4 was signed by Donald Klimoski II on behalf of Winmill & Co. Incorporated on 08/29/2025.