Winmill Mark Campbell insider trades
Winmill Mark Campbell has filed 18 Form 4s with the SEC that we hold, all for Global Self Storage, Inc. (SELF), as President and CEO, Director. Across all of them we count 37 purchases worth $411.4K and 0 sales worth $0 reported on Form 4. In the last 12 months: 9 purchases ($125.9K) and 0 sales ($0). The largest single trade was a purchase of 20,000 shares of Global Self Storage, Inc. worth $99.4K, dated 2024-05-30. The first filing on our record is dated 2021-08-24 and the latest 2026-09-11.
Global Self Storage, Inc. (SELF)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-08-20 | P, purchase reported on Form 4 | 1,000 | $5.1K | 2021-08-24 |
| 2021-08-24 | P, purchase reported on Form 4 | 1,000 | $5.1K | 2021-08-25 |
| 2022-05-20 | P, purchase reported on Form 4 | 1,700 | $9.8K | 2022-05-23 |
| 2022-08-23 | P, purchase reported on Form 4 | 1,400 | $8.5K | 2022-08-24 |
| 2022-08-23 | P, purchase reported on Form 4 | 600 | $3.6K | 2022-08-24 |
| 2022-11-18 | P, purchase reported on Form 4 | 1,100 | $5.7K | 2022-11-21 |
| 2022-11-18 | P, purchase reported on Form 4 | 900 | $4.7K | 2022-11-21 |
| 2022-11-18 | P, purchase reported on Form 4 | 100 | $517 | 2022-11-21 |
| 2023-05-15 | P, purchase reported on Form 4 | 655 | $3.4K | 2023-05-16 |
| 2023-05-15 | P, purchase reported on Form 4 | 1,300 | $6.7K | 2023-05-16 |
| 2023-05-15 | P, purchase reported on Form 4 | 1,500 | $7.6K | 2023-05-16 |
| 2023-05-15 | P, purchase reported on Form 4 | 1,800 | $9.2K | 2023-05-16 |
| 2023-05-15 | P, purchase reported on Form 4 | 100 | $513 | 2023-05-16 |
| 2023-05-15 | P, purchase reported on Form 4 | 745 | $3.8K | 2023-05-16 |
| 2023-05-15 | P, purchase reported on Form 4 | 200 | $1.0K | 2023-05-16 |
| 2023-08-17 | P, purchase reported on Form 4 | 1,000 | $5.1K | 2023-08-18 |
| 2023-11-16 | P, purchase reported on Form 4 | 1,200 | $5.8K | 2023-11-17 |
| 2023-11-16 | P, purchase reported on Form 4 | 489 | $2.4K | 2023-11-17 |
| 2023-11-16 | P, purchase reported on Form 4 | 1,000 | $4.8K | 2023-11-17 |
| 2023-11-16 | P, purchase reported on Form 4 | 2,000 | $9.7K | 2023-11-17 |
| 2023-11-16 | P, purchase reported on Form 4 | 1,000 | $4.8K | 2023-11-17 |
| 2023-11-16 | P, purchase reported on Form 4 | 1,511 | $7.3K | 2023-11-17 |
| 2024-05-28 | P, purchase reported on Form 4 | 100 | $490 | 2024-05-30 |
| 2024-05-28 | P, purchase reported on Form 4 | 375 | $1.8K | 2024-05-30 |
| 2024-05-28 | P, purchase reported on Form 4 | 2,400 | $11.8K | 2024-05-30 |
| 2024-05-28 | P, purchase reported on Form 4 | 24 | $118 | 2024-05-30 |
| 2024-05-30 | P, purchase reported on Form 4 | 20,000 | $99.4K | 2024-05-30 |
| 2025-05-19 | P, purchase reported on Form 4 | 10,000 | $56.7K | 2025-05-20 |
| 2025-12-03 | P, purchase reported on Form 4 | 6,000 | $30.8K | 2025-12-05 |
| 2025-12-04 | P, purchase reported on Form 4 | 6,000 | $30.8K | 2025-12-05 |
| 2025-12-05 | P, purchase reported on Form 4 | 3,600 | $18.3K | 2025-12-05 |
| 2025-12-05 | P, purchase reported on Form 4 | 800 | $4.0K | 2025-12-05 |
| 2026-05-14 | P, purchase reported on Form 4 | 4,000 | $21.3K | 2026-05-15 |
| 2026-09-09 | P, purchase reported on Form 4 | 1,600 | $8.3K | 2026-09-11 |
| 2026-09-09 | P, purchase reported on Form 4 | 2,058 | $10.6K | 2026-09-11 |
| 2026-09-10 | P, purchase reported on Form 4 | 50 | $258 | 2026-09-11 |
| 2026-09-10 | P, purchase reported on Form 4 | 292 | $1.5K | 2026-09-11 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1019264) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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