Global Self Storage (SELF) CEO receives new performance-based stock awards

Rhea-AI Filing Summary

Global Self Storage, Inc. reported that President and CEO Mark Campbell Winmill received two stock awards of Common Stock, each for 12,672 shares, on March 24, 2026. These are classified as grant or award acquisitions rather than open-market purchases.

One grant was earned based on achieving certain 2025 performance targets and will vest 6.25% quarterly over four years, applied retroactively from 2025. The second grant will be earned based on 2026 performance targets and will also vest 6.25% quarterly over four years, retroactive from 2026. Winmill has voting and dividend rights on all awarded shares, including unvested shares, and his direct holdings after these awards total 364,582.289 shares of Common Stock.

Insights

Equity compensation analyst

CEO received performance-linked stock awards that increase equity exposure but reflect routine compensation rather than open-market buying.

President and CEO Mark Campbell Winmill was granted two awards of 12,672 Common Stock shares each as compensation tied to 2025 and 2026 performance targets. These awards are coded as acquisitions under a grant or award, not discretionary market purchases.

The shares vest gradually at 6.25% per quarter over four years, with vesting schedules applied retroactively to the respective performance years. However, the CEO already holds voting and dividend rights on all of these shares, including those not yet vested, which aligns his interests with shareholders. Following the awards, his direct holdings total 364,582.289 shares, indicating a sizable ongoing equity stake.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider WINMILL MARK CAMPBELL

Role President and CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	12,672	$5.08	$64K
Grant/Award	Common Stock	12,672	$5.10	$65K

Holdings After Transaction: Common Stock — 351,910.289 shares (Direct)

Footnotes (1)

1. Shares earned based on achieving certain 2025 performance targets. The shares will vest 6.25% quarterly retroactively from 2025 over a four year period. The Reporting Person has voting and dividend rights on all of these shares, including unvested shares. Shares will be earned based upon achieving certain 2026 performance targets, then will vest 6.25% quarterly retroactively from 2026 over a four year period. The Reporting Person has dividend and voting rights on all of these shares, including unvested shares.

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 MARK CAMPBELL

(Last) (First) (Middle)

3814 ROUTE 44

(Street)

MILLBROOK NEW YORK 12545

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/24/2026

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

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

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

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	03/24/2026		A		12,672(1)	A	$5.08	351,910.289	D
Common Stock	03/24/2026		A		12,672(2)	A	$5.1	364,582.289	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:

1. Shares earned based on achieving certain 2025 performance targets. The shares will vest 6.25% quarterly retroactively from 2025 over a four year period. The Reporting Person has voting and dividend rights on all of these shares, including unvested shares.

2. Shares will be earned based upon achieving certain 2026 performance targets, then will vest 6.25% quarterly retroactively from 2026 over a four year period. The Reporting Person has dividend and voting rights on all of these shares, including unvested shares.

	Mark C. Winmill	03/25/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Global Self Storage (SELF) disclose about CEO Mark Winmill’s recent stock awards?

Global Self Storage disclosed that CEO Mark Campbell Winmill received two Common Stock awards of 12,672 shares each. Both are classified as grant or award acquisitions and increase his direct holdings to 364,582.289 shares after the transactions, aligning compensation with company performance targets.

Are the recent Global Self Storage (SELF) CEO share awards open-market purchases?

No, the CEO’s new shares are grants, not open-market purchases. Both Form 4 entries use transaction code A for grants or awards, meaning the shares were issued as compensation tied to performance, rather than bought on the market at the reported per-share prices.

How are Global Self Storage (SELF) CEO stock awards linked to 2025 and 2026 performance?

One 12,672-share grant was earned based on achieving certain 2025 performance targets, while the second 12,672-share grant will be earned based on 2026 targets. This structure directly ties the CEO’s equity compensation to company performance in those specific years.

What is the vesting schedule for the Global Self Storage (SELF) CEO’s new stock awards?

Each award will vest 6.25% quarterly over four years. For the 2025-related grant, vesting is retroactive from 2025, and for the 2026-related grant, vesting is retroactive from 2026, creating long-term incentive alignment over multiple years.

Does the Global Self Storage (SELF) CEO have rights on unvested award shares?

Yes, the CEO has voting and dividend rights on all shares from both awards, including unvested shares. This means he participates in shareholder votes and receives dividends on the full grant amounts even before the quarterly vesting is fully completed.

How many Global Self Storage (SELF) shares does the CEO hold after these awards?

After the two 12,672-share awards, the CEO’s direct holdings total 364,582.289 Common Stock shares. This figure, reported in the Form 4, reflects his position after both compensation-related acquisitions on March 24, 2026.