SELF (Global Self Storage, Inc. Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by SELF officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-11 | MARK CAMPBELL WINMILL | President and CEO | Buy | — | — |
| 2026-08-26 | WINMILL & CO. INC | — | Buy | — | — |
| 2026-08-24 | WINMILL & CO. INC | — | Buy | — | — |
| 2026-08-20 | WINMILL & CO. INC | — | Buy | — | — |
| 2026-08-18 | WINMILL & CO. INC | — | Buy | — | — |
| 2026-08-14 | RUSSELL E BURKE III | Director | Buy | — | — |
| 2026-08-14 | WINMILL & CO. INC | — | Buy | — | — |
| 2026-08-13 | William Chester Zachary | Director | A | — | — |
| 2026-08-13 | RUSSELL E BURKE III | Director | A | — | — |
| 2026-08-12 | WINMILL & CO. INC | — | Buy | — | — |
| 2026-05-15 | MARK CAMPBELL WINMILL | President and CEO | Buy | — | — |
| 2026-05-14 | William Chester Zachary | Director | A | — | — |
| 2026-05-14 | RUSSELL E BURKE III | Director | A | — | — |
| 2026-04-01 | William Chester Zachary | Director | A | — | — |
| 2026-04-01 | RUSSELL E BURKE III | Director | A | — | — |
| 2026-03-25 | Donald Klimoski II | General Counsel | A | — | — |
| 2026-03-25 | Thomas OMalley | Chief Financial Officer | A | — | — |
| 2026-03-25 | Russell Kamerman | Assistant General Counsel | A | — | — |
| 2026-03-25 | MARK CAMPBELL WINMILL | President and CEO | A | — | — |
| 2025-12-05 | MARK CAMPBELL WINMILL | President and CEO | Buy | — | — |
| 2025-12-02 | Donald Klimoski II | General Counsel | Buy | — | — |
| 2025-12-01 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-11-26 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-11-24 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-11-20 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-11-18 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-11-17 | RUSSELL E BURKE III | Director | A | — | — |
| 2025-11-17 | William Chester Zachary | Director | A | — | — |
| 2025-11-14 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-11-12 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-08-29 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-08-28 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-08-26 | RUSSELL E BURKE III | Director | Buy | — | — |
| 2025-08-26 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-08-22 | WINMILL & CO. INC | — | Buy | — | — |
| 2025-08-20 | RUSSELL E BURKE III | Director | A | — | — |
| 2025-08-20 | William Chester Zachary | Director | A | — | — |
| 2025-06-18 | RUSSELL E BURKE III | Director | A | — | — |
| 2025-06-18 | William Chester Zachary | Director | A | — | — |
| 2025-05-22 | Sally Coonrad Carroll | Director | Buy | — | — |
| 2025-05-21 | RUSSELL E BURKE III | Director | A | — | — |
| 2025-05-21 | William Chester Zachary | Director | A | — | — |
| 2025-05-20 | MARK CAMPBELL WINMILL | President and CEO | Buy | — | — |
| 2025-05-19 | TUXIS CORP | — | Buy | — | — |
| 2025-04-01 | RUSSELL E BURKE III | Director | A | — | — |
| 2025-04-01 | William Chester Zachary | Director | A | — | — |
| 2025-03-26 | MARK CAMPBELL WINMILL | President and CEO | A | — | — |
| 2025-03-26 | Thomas OMalley | Chief Financial Officer | A | — | — |
| 2025-03-26 | Donald Klimoski II | General Counsel | A | — | — |
| 2025-03-26 | Russell Kamerman | Assistant General Counsel | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | President and CEO | 372,290 | — |
| — | — | 303,758 | — |
| — | — | 220,751 | — |
| — | — | 135,101 | — |
| — | General Counsel | 97,554 | — |
| — | Chief Financial Officer | 86,167 | — |
| — | Director | 40,002 | — |
| — | Director | 18,296 | — |
| — | Assistant General Counsel | 5,925 | — |
| — | Director | 3,776 | — |
| — | Director | 2,268 | — |
| — | Director | 1,100 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the SELF quote page; the site-wide leaderboard is on the insider transactions hub.