SCHEDULE: Insider Group Boosts Global Self Storage Stake to 8.4%

A group of insiders, including CEO Mark C. Winmill, has increased its beneficial ownership in Global Self Storage, Inc. to 8.4% through recent open market purchases.

Summary

• Mark C. Winmill and affiliated entities (Winmill Family Trust, Winmill & Co. Incorporated, Midas Securities Group, Inc., TUXIS CORP) collectively reported beneficial ownership of Global Self Storage, Inc. common stock.
• Mark C. Winmill's beneficial ownership stands at 947,735.29 shares, representing approximately 8.4% of the outstanding shares.
• Thomas B. Winmill's beneficial ownership is 587,600 shares, or approximately 5.2% of the outstanding shares.
• Winmill & Co. Incorporated and Winmill Family Trust each beneficially own 586,500 shares, also representing 5.2% of the outstanding shares.
• Midas Securities Group, Inc. holds 438,859 shares (3.9%), and TUXIS CORP holds 303,758 shares (2.7%).
• The reporting persons acquired these shares for investment purposes.
• The total number of shares outstanding for Global Self Storage, Inc. was 11,337,720 as of November 6, 2025.

Sentiment

Score: 7

Explanation: The consistent open market purchases by key insiders, including the CEO, indicate strong confidence in the company's future prospects and valuation, which is generally a positive signal for investors.

Positives

• Significant open market purchases by Mark C. Winmill and Winmill & Co. Incorporated in the past 60 days, totaling 88,332 shares, indicate strong insider confidence.
• Mark C. Winmill, the CEO, President, and Chairman, increased his beneficial ownership to 8.4%, aligning his interests further with shareholders.
• Thomas B. Winmill, a long-serving director, maintains a substantial beneficial ownership of 5.2%.

Future Outlook

The reporting persons acquired the shares for investment purposes and may at any time modify, change, abandon, or replace these purposes and plans.

Industry Context

This filing primarily details changes in insider ownership and does not provide specific information to analyze broader industry trends or competitive landscape for the self-storage sector.

Related Party Transactions

• The Issuer previously acquired the membership interests of Tuxis Self Storage I LLC, Tuxis Self Storage II LLC, and Tuxis Real Estate II LLC (TUXS Subsidiaries) from TUXS, an Issuer affiliate, for $7,800,000 in cash and shares in 2016.
• Certain officers and/or directors of the Issuer also serve as officers, directors, and/or trustees of the Reporting Persons, indicating intertwined relationships.

Stakeholder Impact

• Shareholders may view the increased insider ownership as a positive sign of management's commitment and belief in the company's value.
• The alignment of interests between management and shareholders could foster greater confidence in the company's long-term strategy.

Key Dates

Recommendation

The significant insider buying, particularly by the CEO and affiliated entities, signals strong internal confidence in Global Self Storage, Inc.'s valuation and future prospects. This typically suggests that the stock may be undervalued or poised for growth. However, without additional financial performance data or strategic updates from the company, a 'hold' recommendation is prudent for existing investors, while potential new investors should conduct further due diligence beyond this ownership disclosure.

Keywords

Global Self Storage, GSS, Schedule 13D, Insider Ownership, Beneficial Ownership, Stock Purchases, Investment, SEC Filing, Mark C. Winmill, Thomas B. Winmill, Winmill & Co., TUXIS CORP