SEC Form 4 · Updated Daily
SELF
— GLOBAL SELF STORAGE, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| WINMILL MARK CAMPBELL | Director · Officer | 372,582.289 | 2026-09-10 | P |
| WINMILL & CO. INC | Reporting Owner | 228,512 | 2026-08-26 | P |
| Klimoski Donald II | Officer | 97,554 | 2026-03-24 | A |
| OMalley Thomas | Officer | 91,694 | 2026-03-24 | A |
| BURKE RUSSELL E III | Director | 40,002 | 2026-08-13 | P |
| Zachary William Chester | Director | 18,296 | 2026-08-11 | A |
| Kamerman Russell | Officer | 5,925 | 2026-03-24 | A |
| Carroll Sally Coonrad | Director | 3,776 | 2025-05-21 | P |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-10 | WINMILL MARK CAMPBELL | Open-market buy | 292 | $5.16 | 372,582.289 |
| 2026-09-10 | WINMILL MARK CAMPBELL | Open-market buy | 50 | $5.16 | 372,290.289 |
| 2026-09-09 | WINMILL MARK CAMPBELL | Open-market buy | 2,058 | $5.16 | 372,240.289 |
| 2026-09-09 | WINMILL MARK CAMPBELL | Open-market buy | 1,600 | $5.16 | 370,182.289 |
| 2026-08-26 | WINMILL & CO. INC | Open-market buy | 7,761 | $5.64 | 228,512 |
| 2026-08-25 | WINMILL & CO. INC | Open-market buy | 7,547 | $5.66 | 220,751 |
| 2026-08-24 | WINMILL & CO. INC | Open-market buy | 8,022 | $5.62 | 213,204 |
| 2026-08-21 | WINMILL & CO. INC | Open-market buy | 7,117 | $5.45 | 205,182 |
| 2026-08-20 | WINMILL & CO. INC | Open-market buy | 6,901 | $5.42 | 198,065 |
| 2026-08-19 | WINMILL & CO. INC | Open-market buy | 6,877 | $5.40 | 191,164 |
| 2026-08-18 | WINMILL & CO. INC | Open-market buy | 5,736 | $5.32 | 184,287 |
| 2026-08-17 | WINMILL & CO. INC | Open-market buy | 7,117 | $5.33 | 178,551 |
| 2026-08-14 | WINMILL & CO. INC | Open-market buy | 6,029 | $5.23 | 171,434 |
| 2026-08-13 | WINMILL & CO. INC | Open-market buy | 5,629 | $5.20 | 165,405 |
| 2026-08-13 | BURKE RUSSELL E III | Open-market buy | 1,625 | $5.21 | 40,002 |
| 2026-08-12 | WINMILL & CO. INC | Open-market buy | 6,248 | $5.15 | 159,776 |
| 2026-08-11 | WINMILL & CO. INC | Open-market buy | 5,887 | $5.17 | 153,528 |
| 2026-08-11 | BURKE RUSSELL E III | Grant / award | 196 | $5.10 | 38,377 |
| 2026-08-11 | Zachary William Chester | Grant / award | 196 | $5.10 | 18,296 |
| 2026-05-14 | WINMILL MARK CAMPBELL | Open-market buy | 4,000 | $5.33 | 368,582.289 |
| 2026-05-12 | Zachary William Chester | Grant / award | 94 | $5.31 | 18,100 |
| 2026-05-12 | BURKE RUSSELL E III | Grant / award | 94 | $5.31 | 38,181 |
| 2026-03-31 | Zachary William Chester | Grant / award | 2,739 | $5.11 | 18,006 |
| 2026-03-31 | BURKE RUSSELL E III | Grant / award | 2,739 | $5.11 | 38,087 |
| 2026-03-24 | WINMILL MARK CAMPBELL | Grant / award | 12,672 | $5.10 | 364,582.289 |
| 2026-03-24 | WINMILL MARK CAMPBELL | Grant / award | 12,672 | $5.08 | 351,910.289 |
| 2026-03-24 | OMalley Thomas | Grant / award | 5,527 | $5.10 | 91,694 |
| 2026-03-24 | OMalley Thomas | Grant / award | 5,527 | $5.08 | 86,167 |
| 2026-03-24 | Klimoski Donald II | Grant / award | 5,527 | $5.10 | 97,554 |
| 2026-03-24 | Klimoski Donald II | Grant / award | 5,527 | $5.08 | 92,027 |
| 2026-03-24 | Kamerman Russell | Grant / award | 500 | $5.10 | 5,925 |
| 2025-12-05 | WINMILL MARK CAMPBELL | Open-market buy | 3,600 | $5.09 | 339,238.289 |
| 2025-12-05 | WINMILL MARK CAMPBELL | Open-market buy | 800 | $5.05 | 335,638.289 |
| 2025-12-04 | WINMILL MARK CAMPBELL | Open-market buy | 6,000 | $5.14 | 334,838.289 |
| 2025-12-03 | WINMILL MARK CAMPBELL | Open-market buy | 6,000 | $5.13 | 328,838.289 |
| 2025-12-02 | Klimoski Donald II | Open-market buy | 446 | $5.05 | 86,500 |
| 2025-12-01 | WINMILL & CO. INC | Open-market buy | 3,062 | $5.18 | 147,641 |
| 2025-11-28 | WINMILL & CO. INC | Open-market buy | 3,342 | $5.16 | 144,579 |
| 2025-11-26 | WINMILL & CO. INC | Open-market buy | 4,873 | $5.17 | 141,237 |
| 2025-11-25 | WINMILL & CO. INC | Open-market buy | 4,547 | $5.18 | 136,364 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.