Global Self Storage, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Global Self Storage, Inc. (SELF), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are SELF insiders buying or selling?
In the last 12 months, Global Self Storage, Inc. insiders reported 18 open-market purchases ($940.7K) and 0 sales ($0) — net buying of $940.7K. Since May 2018, Trabud has recorded 64 Form 4 filings for SELF: 63 buys ($2.0M) and 1 sells ($69.0K).
Source: SEC EDGAR Form 4
What stands out
- The largest open-market purchase in the last 12 months was $86.5K by WINMILL & CO. INC (Other) on Aug 26, 2026. SEC ↗
- 3 different insiders made open-market purchases of SELF in the last 90 days, totaling $465.8K.
- The most recent open-market purchase was reported on Sep 11, 2026 (37 days ago).
Key Statistics (May 2018 – Sep 11, 2026)
Total Form 4 filings
64
SEC EDGAR
Insider filers
7
Insider buys (63)
$2.0M
Insider sells (1)
$69.0K
Insider sentiment
Net buyingNet insider flow of $1.9M in net buying since May 2018, and $940.7K in net buying over the last 12 months. 8 insider buys in the last 90 days.
Recent SELF insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 11, 2026 | Mark Campbell Winmill | President and CEO | Purchase | 4.0K | $5.16 | $20.6K | SEC ↗ |
| Aug 26, 2026 | WINMILL & CO. INC | Other | Purchase | 15.3K | $5.65 | $86.5K | SEC ↗ |
| Aug 24, 2026 | WINMILL & CO. INC | Other | Purchase | 15.1K | $5.54 | $83.9K | SEC ↗ |
| Aug 20, 2026 | WINMILL & CO. INC | Other | Purchase | 13.8K | $5.41 | $74.6K | SEC ↗ |
| Aug 18, 2026 | WINMILL & CO. INC | Other | Purchase | 12.9K | $5.33 | $68.4K | SEC ↗ |
| Aug 14, 2026 | Russell E Burke III | Director | Purchase | 1.6K | $5.21 | $8.5K | SEC ↗ |
| Aug 14, 2026 | WINMILL & CO. INC | Other | Purchase | 11.7K | $5.21 | $60.8K | SEC ↗ |
| Aug 12, 2026 | WINMILL & CO. INC | Other | Purchase | 12.1K | $5.16 | $62.6K | SEC ↗ |
| May 15, 2026 | Mark Campbell Winmill | President and CEO | Purchase | 4.0K | $5.33 | $21.3K | SEC ↗ |
| Dec 5, 2025 | Mark Campbell Winmill | President and CEO | Purchase | 16.4K | $5.12 | $84.0K | SEC ↗ |
| Dec 2, 2025 | Donald Klimoski II | General Counsel | Purchase | 446 | $5.05 | $2.3K | SEC ↗ |
| Dec 1, 2025 | WINMILL & CO. INC | Other | Purchase | 6.4K | $5.17 | $33.1K | SEC ↗ |
| Nov 26, 2025 | WINMILL & CO. INC | Other | Purchase | 9.4K | $5.17 | $48.7K | SEC ↗ |
| Nov 24, 2025 | WINMILL & CO. INC | Other | Purchase | 10.3K | $5.11 | $52.6K | SEC ↗ |
| Nov 20, 2025 | WINMILL & CO. INC | Other | Purchase | 12.1K | $5.11 | $61.8K | SEC ↗ |
| Nov 18, 2025 | WINMILL & CO. INC | Other | Purchase | 11.8K | $5.14 | $60.9K | SEC ↗ |
| Nov 14, 2025 | WINMILL & CO. INC | Other | Purchase | 13.7K | $5.06 | $69.5K | SEC ↗ |
| Nov 12, 2025 | WINMILL & CO. INC | Other | Purchase | 8.1K | $5.01 | $40.7K | SEC ↗ |
| Aug 29, 2025 | WINMILL & CO. INC | Other | Purchase | 4.6K | $5.48 | $25.2K | SEC ↗ |
| Aug 28, 2025 | WINMILL & CO. INC | Other | Purchase | 12.7K | $5.39 | $68.4K | SEC ↗ |
| Aug 26, 2025 | Russell E Burke III | Director | Purchase | 105 | $5.25 | $550.73 | SEC ↗ |
| Aug 26, 2025 | WINMILL & CO. INC | Other | Purchase | 15.6K | $5.24 | $81.8K | SEC ↗ |
| Aug 22, 2025 | WINMILL & CO. INC | Other | Purchase | 2.7K | $5.14 | $13.7K | SEC ↗ |
| May 22, 2025 | Sally Coonrad Carroll | Director | Purchase | 1.8K | $5.63 | $10.0K | SEC ↗ |
| May 20, 2025 | Mark Campbell Winmill | President and CEO | Purchase | 10.0K | $5.67 | $56.7K | SEC ↗ |
Showing the 25 most recent of 64 Form 4 filings for Global Self Storage, Inc..
Most active SELF insiders
- WINMILL & CO. INC23 filings
- Mark Campbell Winmill18 filings
- Donald Klimoski II8 filings
- Russell E Burke III6 filings
- TUXIS CORP6 filings
Ask anything about SELF insider activity
Use Trabud's AI agent to query Global Self Storage, Inc.'s Form 4 history in plain English — "Show me SELF CEO purchases this year" or compare it against any other ticker.
Open the AI agentSELF insider trading FAQ
Are Global Self Storage, Inc. insiders buying or selling?
In the last 12 months, Global Self Storage, Inc. insiders reported 18 open-market purchases ($940.7K) and 0 sales ($0) — net buying of $940.7K. Since May 2018, Trabud has recorded 64 Form 4 filings for SELF: 63 buys ($2.0M) and 1 sells ($69.0K). Over the full record that is net buying of $1.9M.
How many insiders trade SELF stock?
7 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Global Self Storage, Inc.. The most recent filing was accepted on Sep 11, 2026.
Where does Trabud get SELF insider trading data?
All SELF insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.