Mark Campbell Winmill
President and CEO, Director · Global Self Storage, Inc.
- 2025
- Sep 11, 2026
- 5
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark Campbell Winmill files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- WINMILL CO. INC - $804K in SELF purchases and sales in the last 12 months
- Russell E. Burke III - $8K in SELF purchases and sales in the last 12 months
- Donald Klimoski II - $2K in SELF purchases and sales in the last 12 months
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Frequently asked questions
Who is Mark Campbell Winmill?
Mark Campbell Winmill is a corporate insider, tracked as President and CEO, Director of Global Self Storage, Inc. (SELF). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark Campbell Winmill submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mark Campbell Winmill been buying or selling stock?
Recorded transactions: 10 open-market purchases ($183K) and 0 open-market sales across all tracked filings.
