WINMILL MARK CAMPBELL (CIK 1019264) reported 10 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-15). Recent activity: Buy SELF (4,000 shares), Buy SELF (12,672 shares), Buy SELF (12,672 shares), Buy SELF (6,000 shares), Buy SELF (6,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-15 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 4,000 | $21,320 |
| 2026-03-25 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 12,672 | $64,374 |
| 2026-03-25 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 12,672 | $64,627 |
| 2025-12-05 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 6,000 | $30,780 |
| 2025-12-05 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 6,000 | $30,840 |
| 2025-12-05 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 800 | $4,040 |
| 2025-12-05 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 3,600 | $18,324 |
| 2025-05-20 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 10,000 | $56,700 |
| 2025-03-26 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 12,672 | $64,374 |
| 2025-03-26 | Global Self Storage, Inc. (SELF) | President and CEO | Buy | 12,672 | $54,743 |
Source: SEC Form 4 filings · as of 2026-05-15