Global Self Storage, Inc. (SELF) Insider Ownership

Historic Insider Ownership Trends

Over the 90-day window ending February 19, 2026, Global Self Storage's three dominant insider ownership positions are held by President And Ceo Mark Campbell Winmill (339.24K shares), Other Corp Tuxis (303.76K shares), Other & Co. Inc Winmill (147.64K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Mark Campbell Winmill President And Ceo 339,238 05 Dec, 2025
Corp Tuxis 303,758 19 May, 2025
& Co. Inc Winmill 147,641 01 Dec, 2025
Donald Ii Klimoski General Counsel 86,500 02 Dec, 2025
Thomas Omalley Chief Financial Officer 80,640 26 Mar, 2025
Russell E Iii Burke 35,348 17 Nov, 2025
William Chester Zachary 15,267 17 Nov, 2025
Russell Kamerman Assistant General Counsel 5,425 26 Mar, 2025
Sally Coonrad Carroll 3,776 22 May, 2025
George B Langa 3,547 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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
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
04 Dec, 2025 Mark Campbell Winmill Common Stock A 6,000 $5.14 334,838 D P
03 Dec, 2025 Mark Campbell Winmill Common Stock A 6,000 $5.13 328,838 D P
02 Dec, 2025 Donald Ii Klimoski Common Stock A 446 $5.05 86,500 D P
01 Dec, 2025 & Co. Inc Winmill Common Stock A 3,062 $5.18 147,641 D P
28 Nov, 2025 & Co. Inc Winmill Common Stock A 3,342 $5.16 144,579 D P
26 Nov, 2025 & Co. Inc Winmill Common Stock A 4,873 $5.17 141,237 D P
25 Nov, 2025 & Co. Inc Winmill Common Stock A 4,547 $5.18 136,364 D P
24 Nov, 2025 & Co. Inc Winmill Common Stock A 4,064 $5.14 131,817 D P
21 Nov, 2025 & Co. Inc Winmill Common Stock A 6,226 $5.09 127,753 D P
20 Nov, 2025 & Co. Inc Winmill Common Stock A 5,870 $5.08 121,527 D P
19 Nov, 2025 & Co. Inc Winmill Common Stock A 6,226 $5.13 115,657 D P
18 Nov, 2025 & Co. Inc Winmill Common Stock A 5,618 $5.16 109,431 D P
17 Nov, 2025 & Co. Inc Winmill Common Stock A 6,226 $5.12 103,813 D P
14 Nov, 2025 & Co. Inc Winmill Common Stock A 7,035 $5.09 97,587 D P
13 Nov, 2025 & Co. Inc Winmill Common Stock A 6,694 $5.03 90,552 D P
13 Nov, 2025 Russell E Iii Burke Common Stock A 248 $5.03 35,348 D A
13 Nov, 2025 William Chester Zachary Common Stock A 2,584 $5.03 15,267 D A
12 Nov, 2025 & Co. Inc Winmill Common Stock A 6,055 $5.03 83,858 D P