SELF affiliate increases stake to 121,527 shares via Form 4 buys

Rhea-AI Filing Summary

Global Self Storage, Inc. (SELF) reported an insider share purchase by an affiliate. A Form 4 shows that on 11/19/2025 the reporting person purchased 6,226 shares of common stock at $5.1349 per share, and on 11/20/2025 purchased an additional 5,870 shares at $5.0838 per share, both coded as open-market or private purchases. Following these transactions, the reporting person beneficially owns 121,527 shares directly.

The remarks explain that the reporting person may be deemed an affiliate of the company because the Winmill Family Trust owns all of its voting stock. Several trustees of the Winmill Family Trust may be deemed to have indirect beneficial ownership of these shares, but each of them and the trust disclaim beneficial ownership.

Insider Trade Summary

Net Buyer: 12,096 shares ($61,812)

Net Buy 2 txns

Insider WINMILL & CO. INC

Role Insider

Bought 12,096 shs ($62K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	5,870	$5.0838	$30K
Purchase	Common Stock	6,226	$5.1349	$32K

Holdings After Transaction: Common Stock — 121,527 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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)
11/19/2025

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	11/19/2025		P		6,226	A	$5.1349	115,657	D
Common Stock	11/20/2025		P		5,870	A	$5.0838	121,527	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	11/20/2025
	** 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 transaction did SELF report on this Form 4?

The filing reports that an affiliate of Global Self Storage, Inc. (SELF) purchased common stock in two transactions on 11/19/2025 and 11/20/2025.

How many SELF shares were bought in the reported transactions?

The reporting person bought 6,226 shares of SELF common stock on 11/19/2025 and 5,870 shares on 11/20/2025, for a total of 12,096 shares.

At what prices were the SELF shares purchased?

The purchases were made at prices of $5.1349 per share on 11/19/2025 and $5.0838 per share on 11/20/2025, classified as purchase transactions.

How many SELF shares does the reporting person own after these trades?

After the reported purchases, the reporting person beneficially owns 121,527 shares of Global Self Storage, Inc. common stock, held with direct ownership.

Who is the reporting person and what is their relationship to SELF?

The reporting person is Winmill & Co. Incorporated, which may be deemed an affiliate of SELF. The Winmill Family Trust owns all of the voting stock of the reporting person.

Why are the Winmill Family Trust and its trustees mentioned in the SELF Form 4?

The remarks state that trustees Thomas B. Winmill, Mark C. Winmill, William Winmill, and Woodworth Winmill, and the Winmill Family Trust may be deemed to have indirect beneficial ownership through control of the reporting person, but each disclaims beneficial ownership of these shares.