Mark Campbell Winmill - 09 Sep 2026 Form 4 Insider Report for Global Self Storage, Inc. (SELF)

Reporting relationship: President and CEO, Director
Issuer ticker: SELF
Reported as of: 09 Sep 2026
Net transaction value: +$20,640
SEC form: 4
Accepted by SEC: 11 Sep 2026, 16:29:46 UTC
Prior SEC filing: 15 May 2026
Source filing: View source filing
Reporting owner signature: Mark Winmill

Key filing fact

Mark Campbell Winmill filed Form 4 for Global Self Storage, Inc. (SELF) on 11 Sep 2026.

Key facts

This page summarizes Mark Campbell Winmill's Form 4 filing for Global Self Storage, Inc. (SELF).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 11 Sep 2026, 16:29.

Change

Previous filing in this sequence was filed on 15 May 2026.
Current net transaction value: +$20,640.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001019264 Primary reporting owner

WINMILL MARK CAMPBELL

Relationship: President and CEO, Director
Address: 3814 ROUTE 44, MILLBROOK
Signature: Mark Winmill
Signature date: 11 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SELF transaction

Common Stock

Purchase

Transaction value: $8,256
Shares: +1,600
Change %: +0.43%
Price: $5.16
Shares after: 370,182
Date: 09 Sep 2026
Ownership: Direct

SELF transaction

Common Stock

Purchase

Transaction value: $10,619
Shares: +2,058
Change %: +0.56%
Price: $5.16
Shares after: 372,240
Date: 09 Sep 2026
Ownership: Direct

SELF transaction

Common Stock

Purchase

Transaction value: $258
Shares: +50
Change %: +0.01%
Price: $5.16
Shares after: 372,290
Date: 10 Sep 2026
Ownership: Direct

SELF transaction

Common Stock

Purchase

Transaction value: $1,507
Shares: +292
Change %: +0.08%
Price: $5.16
Shares after: 372,582
Date: 10 Sep 2026
Ownership: Direct

^* marks a reported price that did not pass the local price check.

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. to update or revoke optional consent for future visits. For more information, see our Privacy Policy .