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

Rhea-AI Filing Summary

Winmill & Co. Inc. reported purchases of Global Self Storage, Inc. (ticker SELF) common stock on 08/21/2025 and 08/22/2025. On 08/21/2025 the reporting person acquired 502 shares at $5.12, increasing beneficial ownership to 40,685 shares. On 08/22/2025 an additional 2,160 shares were purchased at $5.1493, bringing total beneficial ownership to 42,845 shares. The filing notes the Reporting Person may be an affiliate and that trustees of the Winmill Family Trust disclaim beneficial ownership.

Positive

• Insider purchases were reported on 08/21/2025 and 08/22/2025 totaling 2,662 shares, showing acquisition activity by the reporting person
• Clear purchase prices disclosed: $5.12 and $5.1493, and updated beneficial ownership totals (40,685 then 42,845 shares)

Negative

• Affiliate status noted, which may complicate interpretation of direct beneficial ownership
• Trustee disclaimers from Thomas B. Winmill, Mark C. Winmill and the Winmill Family Trust limit clarity on ultimate beneficial ownership

Insights

Financial Analyst

TL;DR: Insider purchases totaling 2,662 shares at about $5.13 each, modest in size and unlikely to be material.

The Form 4 shows two small open-market purchases totaling 2,662 shares across consecutive days at prices of $5.12 and $5.1493. These transactions increase the reporting person's beneficial holdings to 42,845 shares. Given the limited scale disclosed and absence of other remuneration or derivative activity, the transactions are routine insider buys and do not by themselves indicate a material change in ownership or control.

Corporate Governance Expert

TL;DR: Disclosure includes affiliate status and trustee disclaimers, which are important for ownership clarity.

The filing explicitly states the Reporting Person may be deemed an affiliate and explains that the Winmill Family Trust owns the reporting entity's voting stock, with trustees identified. Such statements and the trustee disclaimers are standard governance disclosures that clarify potential indirect ownership interests and reduce ambiguity about control. No derivative or option activity was reported.

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)
08/21/2025

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	08/21/2025		P		502	A	$5.12	40,685	D
Common Stock	08/22/2025		P		2,160	A	$5.1493	42,845	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 and Mark C. 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 and the Winmill Family Trust disclaims beneficial ownership of these shares.

	Donald Klimoski II, on behalf of Winmill & Co. Incorporated	08/22/2025
	** 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 trades did Winmill & Co. report for SELF?

Two open-market purchases: 502 shares on 08/21/2025 at $5.12 and 2,160 shares on 08/22/2025 at $5.1493.

How many SELF shares does Winmill & Co. beneficially own after these transactions?

42,845 shares beneficially owned following the 08/22/2025 purchase.

Who filed the Form 4 for these transactions?

Winmill & Co. Inc. filed the Form 4, signed by Donald Klimoski II on behalf of the reporting entity on 08/22/2025.

Does the filing indicate any derivative or option activity?

No derivative or option transactions were reported in Table II of the Form 4.

Is there any special ownership disclosure in the filing?

Yes. The filing states the Reporting Person may be deemed an affiliate and that trustees of the Winmill Family Trust disclaim beneficial ownership of the reported shares.