Mark C. Winmill - 03 Dec 2025 SCHEDULE 13D/A Report for GLOBAL SELF STORAGE, INC. Common Stock, $0.01 par value per share (SELF)

Quoteable Key Fact

"Mark C. Winmill disclosed 8.4% ownership in GLOBAL SELF STORAGE, INC. Common Stock, $0.01 par value per share (SELF) on 03 Dec 2025."

Quick Takeaways

Mark C. Winmill filed SCHEDULE 13D/A for GLOBAL SELF STORAGE, INC. Common Stock, $0.01 par value per share (SELF).
Disclosed ownership: 8.4%.
Date of event: 03 Dec 2025.

This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
You can verify ownership claims directly against the original SEC filing.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Mark Campbell Winmill	8.4%	947,735	339,238	608,497	/s/ Mark C. Winmill	Mark Campbell Winmill	0001019264
Thomas Bassett Winmill	5.2%	587,600	1,100	586,500	/s/ Thomas B. Winmill	Thomas Bassett Winmill	0001018500
Winmill Family Trust	5.2%	586,500	0	586,500	/s/ Thomas B. Winmill	Thomas B. Winmill/Trustee
Winmill & Co. Incorporated	5.2%	586,500	147,641	438,859	/s/ Donald Klimoski II	Donald Klimoski II/Co-General Counsel	0000052234
Midas Securities Group, Inc.	3.9%	438,859	135,101	303,758	/s/ Russell Kamerman	Russell Kamerman/General Counsel	0001141394
TUXIS CORP	2.7%	303,758	303,758	0	/s/ Donald Klimoski II	Donald Klimoski II/General Counsel	0000736952