Mark Winmill - May 21, 2025 SCHEDULE 13D/A Report for GLOBAL SELF STORAGE, INC. Common Stock, $0.01 par value per share (SELF)

Filing Manager
WINMILL MARK CAMPBELL
Reporting Manager
Mark Campbell Winmill
Security
GLOBAL SELF STORAGE, INC. Common Stock, $0.01 par value per share
Symbol
SELF
Shares outstanding
11.3M shares
Disclosed Ownership
824K shares
Ownership
7.3%
Form type
SCHEDULE 13D/A
Date filed
5/21/2025, 04:01 PM
Date of event
May 21, 2025
SEC
View on sec.gov

Reporting Managers (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Mark Campbell Winmill 7.3% 824K 323K 501K /s/ Mark C. Winmill Mark C. Winmill 0001019264
Thomas Bassett Winmill 4.2% 480K 1.1K 479K /s/ Thomas B. Winmill Thomas B. Winmill 0001018500
Winmill Family Trust 4.2% 479K 0 479K /s/ Thomas B. Winmill Thomas B. Winmill/Trustee
Winmill & Co. Incorporated 4.2% 479K 40.2K 439K /s/ Donald Klimoski II Donald Klimoski II/Co-General Counsel 0000052234
Midas Securities Group, Inc. 3.9% 439K 135K 304K /s/ Russell Kamerman Russell Kamerman/General Counsel 0001141394
TUXIS CORP 2.7% 304K 304K 0 /s/ Donald Klimoski II Donald Klimoski II/General Counsel 0000736952