Mark Campbell Winmill

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

2

Stocks Covered

1

Latest Filing

Dec 5, 2025

Filings

SELF

GLOBAL SELF STORAGE, INC.

SC 13D/A · Dec 5, 2025

8.4%

948K shares

SELF

GLOBAL SELF STORAGE, INC.

SC 13D/A · May 21, 2025

7.3%

824K shares