Global Self Storage Inc
Ownership
Ownership Structure
Who owns Global Self Storage Inc (SELF)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 91.8% of the shares are freely tradable; institutional investors hold 28.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Winmill & Co Inc | 5.14 | 586,500 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.76 | 430,003 | +0.0 | 03/31/2026 |
| BlackRock Inc | 2.58 | 294,640 | +25.0 | 03/31/2026 |
| Marathon Capital Management LLC | 2.28 | 260,784 | +0.4 | 06/30/2026 |
| Private Capital Management, LLC | 1.96 | 223,337 | +115.7 | 06/30/2026 |
| Renaissance Technologies Corp | 1.89 | 216,175 | +0.6 | 03/31/2026 |
| Geode Capital Management, LLC | 1.26 | 144,262 | +0.1 | 03/31/2026 |
| Wells Fargo & Co | 1.15 | 130,919 | +6,442.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.74 | 312,824 | +0.0 | 07/31/2026 |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.02 | 116,721 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Winmill Mark Campbell | President and CEO | 372,582 | 1,900,170 $ | Sep 10, 2026 | direct |
| Winmill & Co. Inc | See "Explanation of Responses" | 228,512 | 1,165,411 $ | Aug 26, 2026 | direct |
| Burke Russell E Iii | Director | 40,002 | 204,010 $ | Aug 13, 2026 | direct |
| Zachary William Chester | Director | 18,296 | 93,310 $ | Aug 11, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 10, 2026 | Winmill Mark Campbell | President and CEO | Buy | 292 | 5.16 | 1,507 |
| Sep 10, 2026 | Winmill Mark Campbell | President and CEO | Buy | 50 | 5.16 | 258 |
| Sep 9, 2026 | Winmill Mark Campbell | President and CEO | Buy | 2,058 | 5.16 | 10,619 |
| Sep 9, 2026 | Winmill Mark Campbell | President and CEO | Buy | 1,600 | 5.16 | 8,256 |
| Aug 26, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 7,761 | 5.64 | 43,757 |
| Aug 25, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 7,547 | 5.66 | 42,695 |
| Aug 24, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 8,022 | 5.62 | 45,046 |
| Aug 21, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 7,117 | 5.45 | 38,805 |
| Aug 20, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 6,901 | 5.42 | 37,417 |
| Aug 19, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 6,877 | 5.40 | 37,163 |
| Aug 18, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 5,736 | 5.32 | 30,507 |
| Aug 17, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 7,117 | 5.33 | 37,936 |
| Aug 14, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 6,029 | 5.23 | 31,511 |
| Aug 13, 2026 | Burke Russell E Iii | Director | Buy | 1,625 | 5.21 | 8,459 |
| Aug 13, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 5,629 | 5.20 | 29,277 |
| Aug 12, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 6,248 | 5.15 | 32,192 |
| Aug 11, 2026 | Zachary William Chester | Director | Other | 196 | 5.10 | 1,000 |
| Aug 11, 2026 | Burke Russell E Iii | Director | Other | 196 | 5.10 | 1,000 |
| Aug 11, 2026 | Winmill & Co. Inc | See "Explanation of Responses" | Buy | 5,887 | 5.17 | 30,409 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.