SELF

Global Self Storage, Inc.

Real Estate Investment TrustsNasdaq

Total Trades

38

Buys

37

Sells

1

Largest Trade

$100K–$500K

Insiders

7

Institutional Funds

37

Inst. Value

$1M+

Activist Filings

3

Insider Trades

InsiderTitleTypeValueSharesPriceDate
WINMILL MARK CAMPBELLPresident and CEOBUY$50K–$100K16K$5.12Dec 5, 2025
Klimoski Donald IIGeneral CounselBUY$1K–$15K446$5.05Dec 2, 2025
WINMILL & CO. INCInsiderBUY$15K–$50K6K$5.17Dec 1, 2025
WINMILL & CO. INCInsiderBUY$15K–$50K9K$5.17Nov 26, 2025
WINMILL & CO. INCInsiderBUY$50K–$100K10K$5.11Nov 24, 2025
WINMILL & CO. INCInsiderBUY$50K–$100K12K$5.11Nov 20, 2025
WINMILL & CO. INCInsiderBUY$50K–$100K12K$5.14Nov 18, 2025
WINMILL & CO. INCInsiderBUY$50K–$100K14K$5.06Nov 14, 2025
WINMILL & CO. INCInsiderBUY$15K–$50K8K$5.01Nov 12, 2025
WINMILL & CO. INCInsiderBUY$15K–$50K5K$5.48Aug 29, 2025
WINMILL & CO. INCInsiderBUY$50K–$100K13K$5.39Aug 28, 2025
BURKE RUSSELL E IIIDirectorBUY<$1K105$5.25Aug 26, 2025
WINMILL & CO. INCInsiderBUY$50K–$100K16K$5.24Aug 26, 2025
WINMILL & CO. INCInsiderBUY$1K–$15K3K$5.14Aug 22, 2025
Carroll Sally CoonradDirectorBUY$1K–$15K2K$5.63May 22, 2025
WINMILL MARK CAMPBELLPresident and CEOBUY$50K–$100K10K$5.67May 20, 2025
TUXIS CORPInsiderBUY$100K–$500K19K$5.22May 19, 2025
BURKE RUSSELL E IIIDirectorBUY<$1K168$5.25Nov 22, 2024
WINMILL & CO. INCInsiderBUY$1K–$15K3K$5.22Aug 30, 2024
WINMILL & CO. INCInsiderBUY$15K–$50K5K$5.18Aug 27, 2024
WINMILL & CO. INCInsiderBUY$15K–$50K9K$5.20Aug 23, 2024
WINMILL & CO. INCInsiderBUY$15K–$50K7K$5.10Aug 21, 2024
WINMILL & CO. INCInsiderBUY$15K–$50K7K$5.05Aug 19, 2024
BURKE RUSSELL E IIIDirectorBUY$1K–$15K203$4.98May 31, 2024
WINMILL MARK CAMPBELLPresident and CEOBUY$100K–$500K23K$4.96May 30, 2024
Klimoski Donald IIGeneral CounselBUY$1K–$15K539$4.90May 24, 2024
TUXIS CORPInsiderSELL$50K–$100K15K$4.60Dec 1, 2023
WINMILL MARK CAMPBELLPresident and CEOBUY$15K–$50K7K$4.83Nov 17, 2023
Klimoski Donald IIGeneral CounselBUY$1K–$15K1K$4.80Nov 17, 2023
Carroll Sally CoonradDirectorBUY$1K–$15K2K$5.07Aug 18, 2023
WINMILL MARK CAMPBELLPresident and CEOBUY$1K–$15K1K$5.07Aug 18, 2023
WINMILL MARK CAMPBELLPresident and CEOBUY$15K–$50K8K$5.12May 16, 2023
Klimoski Donald IIGeneral CounselBUY$1K–$15K560$5.08May 15, 2023
LANGA GEORGE BDirectorBUY$1K–$15K2K$5.11Nov 29, 2022
WINMILL MARK CAMPBELLPresident and CEOBUY$15K–$50K3K$5.18Nov 21, 2022
Klimoski Donald IIGeneral CounselBUY<$1K148$5.25Nov 17, 2022
WINMILL MARK CAMPBELLPresident and CEOBUY$15K–$50K5K$6.07Aug 24, 2022
WINMILL MARK CAMPBELLPresident and CEOBUY$1K–$15K2K$5.74May 23, 2022
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Institutional Ownership

13F filings as of Dec 31, 2025 · 37 funds holding

FundShares
MARATHON CAPITAL MANAGEMENT261K
RENAISSANCE TECHNOLOGIES LLC215K
BlackRock, Inc.191K
WINMILL & CO. INC135K
GEODE CAPITAL MANAGEMENT, LLC121K
Kestra Advisory Services, LLC75K
VANGUARD GROUP INC60K
DIMENSIONAL FUND ADVISORS LP52K
EASTERLY INVESTMENT PARTNERS LLC49K
Towneley Capital Management, Inc / DE48K
Cetera Investment Advisers44K
Baker Ellis Asset Management LLC39K
LPL Financial LLC38K
AlphaCentric Advisors LLC35K
PFG Investments, LLC35K
Crossingbridge Advisors, LLC35K
STATE STREET CORP32K
O'SHAUGHNESSY ASSET MANAGEMENT, LLC25K
NewEdge Advisors, LLC24K
JAMES INVESTMENT RESEARCH, INC.24K

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Mark Campbell Winmill

SC 13D/A · Dec 5, 2025

8.4%

948K shares

BARD ASSOCIATES INC

SC 13G/A · Nov 12, 2025

2.9%

330K shares

Mark Campbell Winmill

SC 13D/A · May 21, 2025

7.3%

824K shares

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