Form 4: Winmill & Co. Increases Stake in Global Self Storage

Winmill & Co. Inc. reported two open market purchases of Global Self Storage, Inc. common stock in November 2025, increasing its beneficial ownership.

Summary

• Winmill & Co. Inc., a reporting person potentially deemed an affiliate of Global Self Storage, Inc. (SELF), acquired additional common stock.
• On November 13, 2025, Winmill & Co. Inc. purchased 6,694 shares of common stock at a price of $5.0262 per share.
• On November 14, 2025, an additional 7,035 shares of common stock were acquired at a price of $5.0943 per share.
• Following these transactions, Winmill & Co. Inc. beneficially owns a total of 97,587 shares of Global Self Storage, Inc. common stock.
• The transactions were made pursuant to a Rule 10b5-1 plan.

Sentiment

Score: 7

Explanation: The sentiment is positive due to an affiliate increasing its stake in the company, which typically signals confidence in the company's valuation and future prospects.

Positives

• Increased beneficial ownership by an entity potentially deemed an affiliate, Winmill & Co. Inc., suggests confidence in the company's future prospects.
• The purchases were made at market prices of $5.0262 and $5.0943, indicating a willingness to invest at current valuations.

Management Comments

• 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.

Industry Context

Insider buying, particularly by significant shareholders or affiliates, can be interpreted by the market as a positive signal, suggesting that those with intimate knowledge of the company believe its stock is undervalued or has strong future potential within the self-storage sector.

Related Party Transactions

• Winmill & Co. Inc. is the reporting person, and the Winmill Family Trust owns all of its voting stock. Trustees of the Winmill Family Trust (Thomas B. Winmill, Mark C. Winmill, William Winmill, Woodworth Winmill) may be deemed to have indirect beneficial ownership due to their controlling status, although they disclaim such ownership.

Stakeholder Impact

• Shareholders may view the increased insider ownership as a positive indicator of management and affiliate confidence in the company's value and future performance.

Key Dates

Keywords

Global Self Storage, SELF, Winmill & Co., Insider Buying, Beneficial Ownership, Form 4, Equity Acquisition, Self Storage Industry