Global Self Storage's three largest insider shareholders as of March 23, 2026 are Mark Campbell Winmill (President And Ceo, 339.24K shares), Corp Tuxis (Other, 303.76K shares), Co. Inc Winmill (Other, 147.64K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Mark Campbell Winmill | President And Ceo | 339,238 | 0 | 05 Dec, 2025 |
| Corp Tuxis | 303,758 | 0 | 19 May, 2025 | |
| Co. Inc Winmill | 147,641 | 0 | 01 Dec, 2025 | |
| Donald Ii Klimoski | General Counsel | 86,500 | 0 | 02 Dec, 2025 |
| Thomas Omalley | Chief Financial Officer | 80,640 | 0 | 26 Mar, 2025 |
| Russell E Iii Burke | 35,348 | 0 | 17 Nov, 2025 | |
| William Chester Zachary | 15,267 | 0 | 17 Nov, 2025 | |
| Russell Kamerman | Assistant General Counsel | 5,425 | 0 | 26 Mar, 2025 |
| Sally Coonrad Carroll | 3,776 | 0 | 22 May, 2025 | |
| George B Langa | 3,547 | 0 | 29 Nov, 2022 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 03 Dec, 2025 | Mark Campbell Winmill | Common Stock | A | 6,000 | $5.13 | 328,838 | D | P |
| 04 Dec, 2025 | Mark Campbell Winmill | Common Stock | A | 6,000 | $5.14 | 334,838 | D | P |
| 05 Dec, 2025 | Mark Campbell Winmill | Common Stock | A | 800 | $5.05 | 335,638 | D | P |
| 05 Dec, 2025 | Mark Campbell Winmill | Common Stock | A | 3,600 | $5.09 | 339,238 | D | P |
| 02 Dec, 2025 | Donald Ii Klimoski | Common Stock | A | 446 | $5.05 | 86,500 | D | P |
| 28 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 3,342 | $5.16 | 144,579 | D | P |
| 01 Dec, 2025 | Co. Inc Winmill | Common Stock | A | 3,062 | $5.18 | 147,641 | D | P |
| 25 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 4,547 | $5.18 | 136,364 | D | P |
| 26 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 4,873 | $5.17 | 141,237 | D | P |
| 21 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 6,226 | $5.09 | 127,753 | D | P |
| 24 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 4,064 | $5.14 | 131,817 | D | P |
| 19 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 6,226 | $5.13 | 115,657 | D | P |
| 20 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 5,870 | $5.08 | 121,527 | D | P |
| 17 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 6,226 | $5.12 | 103,813 | D | P |
| 18 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 5,618 | $5.16 | 109,431 | D | P |
| 13 Nov, 2025 | William Chester Zachary | Common Stock | A | 2,584 | $5.03 | 15,267 | D | A |
| 13 Nov, 2025 | Russell E Iii Burke | Common Stock | A | 248 | $5.03 | 35,348 | D | A |
| 13 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 6,694 | $5.03 | 90,552 | D | P |
| 14 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 7,035 | $5.09 | 97,587 | D | P |
| 11 Nov, 2025 | Co. Inc Winmill | Common Stock | A | 2,069 | $4.97 | 77,803 | D | P |