Insider purchases: Winmill & Co. increases SELF stake to 71,142 shares

Rhea-AI Filing Summary

Winmill & Co. Inc. reported two open-market purchases of Global Self Storage, Inc. (Ticker: SELF) common stock on 08/27/2025 and 08/28/2025. On 08/27/2025 the reporting person acquired 5,477 shares at $5.3578, increasing its beneficial ownership to 63,933 shares. On 08/28/2025 an additional 7,209 shares were purchased at $5.4228, bringing total reported beneficial ownership to 71,142 shares. The filing notes the Reporting Person may be deemed an affiliate and describes the Winmill Family Trust and four trustees who may have indirect beneficial interests; those parties expressly disclaim beneficial ownership of the reported shares. The transactions were filed on 08/28/2025.

Positive

• Filed purchases recorded showing transparent disclosure of insider acquisitions on 08/27/2025 and 08/28/2025
• Reported beneficial ownership increased to 71,142 shares, reflecting additional insider holdings

Negative

• Filing does not disclose total outstanding shares or percentage ownership, limiting assessment of transaction materiality
• Reporting Person 'may be deemed to be an affiliate', which could complicate ownership attribution despite disclaimers

Insights

Financial Analyst

TL;DR: Two small open-market purchases increased reported ownership to 71,142 shares, reflecting routine insider accumulation.

The Form 4 documents two purchases executed on consecutive days at prices of $5.3578 and $5.4228, raising Winmill & Co.'s reported beneficial holdings from an earlier level to 71,142 shares. The filing contains no sales, option exercises, or derivative activity. No revenue, earnings, or valuation context is provided in the filing, so market impact assessment must rely solely on the size and timing of these purchases relative to total outstanding shares, which is not disclosed here.

Corporate Governance Expert

TL;DR: Disclosure clarifies potential affiliate status and indirect ownership via a family trust; trustees disclaim beneficial ownership of these shares.

The Remarks state the Reporting Person "may be deemed to be an affiliate" and that the Winmill Family Trust owns voting stock of Winmill & Co. Four named trustees may be viewed as controlling persons with potential indirect beneficial ownership, though they disclaim ownership of the reported shares. The filing is signed and dated by an authorized representative, satisfying Form 4 execution requirements. No related-party transactions or changes in control are disclosed.

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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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)
08/27/2025

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	08/27/2025		P		5,477	A	$5.3578	63,933	D
Common Stock	08/28/2025		P		7,209	A	$5.4228	71,142	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	08/28/2025
	** 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 insider transactions did Winmill & Co. report for SELF?

The Form 4 reports two open-market purchases: 5,477 shares at $5.3578 on 08/27/2025 and 7,209 shares at $5.4228 on 08/28/2025.

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

After the reported purchases, Winmill & Co. reported beneficial ownership of 71,142 shares.

Does the filing show any derivative or option activity for SELF?

No. Table II for derivative securities is empty; the filing shows only non-derivative common stock purchases.

Is there any indication Winmill & Co. is an affiliate of SELF?

The filing states the Reporting Person may be deemed to be an affiliate and explains the Winmill Family Trust and trustees' potential indirect interests, with disclaimers of beneficial ownership.

Who signed the Form 4 and when was it filed?

The Form 4 was signed by Donald Klimoski II, on behalf of Winmill & Co. Incorporated and dated 08/28/2025.