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US INSIDER PROFILE · NON-SCORING RESEARCH
WINMILL MARK CAMPBELL
Chief Executive Officer | President
Identity: SEC reporting-owner CIK · Reporting-owner CIK: 0001019264
Purchase history
- Companies traded
- 1
- Purchases · 12M
- 3
- Purchases · 24M
- 4
- Average purchase
- $45.7K
- Median purchase
- $39.0K
- Gross purchase value
- $182.6K
Companies: Global Self Storage, Inc.
4 SEC accession(s) · 0 joint-owner event(s). Values are reported Form 4 transaction values in USD.
Qualifying purchase disclosures
| Published | Company | Ticker | Role | Reported value | SEC source |
|---|---|---|---|---|---|
| 2026-09-11 | Global Self Storage, Inc. | SELF | Chief Executive Officer | President | $20.6K | Open filing |
| 2026-05-15 | Global Self Storage, Inc. | SELF | Chief Executive Officer | President | $21.3K | Open filing |
| 2025-12-05 | Global Self Storage, Inc. | SELF | Chief Executive Officer | President | $84.0K | Open filing |
| 2025-05-20 | Global Self Storage, Inc. | SELF | Chief Executive Officer | President | $56.7K | Open filing |
Post-purchase outcomes
Excess return = stock return − S&P 500 ETF (SPY adjusted close) return. Returns start on the first shared trading session on or after publication.
No completed point-in-time price outcome is available yet.
Research patterns
- First purchase in 12M
- 0/3
- Large purchase ≥ $100k
- 0/4
- Cluster buying · 15D
- 2/4
- Buying the dip
- 0/—
Routine / opportunistic: Not classifiable. These labels never affect the score or ranking.
Small samples remain visible but are not scored. This research enrichment never affects US-v1.1.