Insider Ledger
SELF insider buying and SEC filings, explained
Global Self Storage, Inc. · CIK 1031235
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- Nasdaq
- Industry (SIC)
- Real Estate Investment Trusts
- State of incorporation
- MD
- Fiscal year end
- Dec 31
- Former names
- Self Storage Group, Inc.; GLOBAL INCOME FUND, INC.; GLOBAL INCOME FUND INC; BULL & BEAR GLOBAL INCOME FUND INC/
Insider activity in the last 12 months
Bought
$930K
Insiders who bought
2
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 9–10, 2026 | Purchase (code P) | Mark Campbell Winmill (CEO and Director) bought 4,000 shares between Sep 9 and Sep 10 at $5.16 ($21K), reported as a purchase (code P). Holdings up 1% to 372,582 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 11, 2026 |
| Aug 25–26, 2026 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 15,308 shares between Aug 25 and Aug 26 at about $5.65 ($86K), reported as a purchase (code P). Holdings up 7% to 228,512 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 26, 2026 |
| Aug 21–24, 2026 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 15,139 shares between Aug 21 and Aug 24 at about $5.54 ($84K), reported as a purchase (code P). Holdings up 8% to 213,204 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 24, 2026 |
| Aug 19–20, 2026 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 13,778 shares between Aug 19 and Aug 20 at about $5.41 ($75K), reported as a purchase (code P). Holdings up 7% to 198,065 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 20, 2026 |
| Aug 17–18, 2026 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 12,853 shares between Aug 17 and Aug 18 at about $5.33 ($68K), reported as a purchase (code P). Holdings up 7% to 184,287 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 18, 2026 |
| Aug 13, 2026 | Purchase (code P) | Russell E. Burke III (Director) bought 1,625 shares at $5.21 ($8K), reported as a purchase (code P). Holdings up 4% to 40,002 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 14, 2026 |
| Aug 13–14, 2026 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 11,658 shares between Aug 13 and Aug 14 at about $5.22 ($61K), reported as a purchase (code P). Holdings up 7% to 171,434 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 14, 2026 |
| Aug 11–12, 2026 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 12,135 shares between Aug 11 and Aug 12 at about $5.16 ($63K), reported as a purchase (code P). Holdings up 8% to 159,776 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 12, 2026 |
| May 14, 2026 | Purchase (code P) | Mark Campbell Winmill (CEO and Director) bought 4,000 shares at $5.33 ($21K), reported as a purchase (code P). Holdings up 1% to 368,582 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 15, 2026 |
| Dec 3–5, 2025 | Purchase (code P) | Mark Campbell Winmill (CEO and Director) bought 16,400 shares between Dec 3, 2025 and Dec 5, 2025 at about $5.12 ($84K), reported as a purchase (code P). Holdings up 5% to 339,238 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 5, 2025 |
| Dec 2, 2025 | Purchase (code P) | Donald Klimoski II (General Counsel) bought 446 shares at $5.05 ($2K), reported as a purchase (code P). Holdings up 1% to 86,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 2, 2025 |
| Nov 28–Dec 1, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 6,404 shares between Nov 28, 2025 and Dec 1, 2025 at about $5.17 ($33K), reported as a purchase (code P). Holdings up 5% to 147,641 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 1, 2025 |
| Nov 25–26, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 9,420 shares between Nov 25, 2025 and Nov 26, 2025 at about $5.17 ($49K), reported as a purchase (code P). Holdings up 7% to 141,237 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 26, 2025 |
| Nov 21–24, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 10,290 shares between Nov 21, 2025 and Nov 24, 2025 at about $5.11 ($53K), reported as a purchase (code P). Holdings up 8% to 131,817 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 24, 2025 |
| Nov 19–20, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 12,096 shares between Nov 19, 2025 and Nov 20, 2025 at about $5.11 ($62K), reported as a purchase (code P). Holdings up 11% to 121,527 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 20, 2025 |
| Nov 17–18, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 11,844 shares between Nov 17, 2025 and Nov 18, 2025 at about $5.14 ($61K), reported as a purchase (code P). Holdings up 12% to 109,431 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 18, 2025 |
| Nov 13–14, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 13,729 shares between Nov 13, 2025 and Nov 14, 2025 at about $5.06 ($69K), reported as a purchase (code P). Holdings up 16% to 97,587 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 14, 2025 |
| Nov 11–12, 2025 | Purchase (code P) | WINMILL & CO. INC (See "Explanation of Responses") bought 8,124 shares between Nov 11, 2025 and Nov 12, 2025 at about $5.01 ($41K), reported as a purchase (code P). Holdings up 11% to 83,858 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 12, 2025 |
12 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
2 insiders bought in 30 days
$457K in purchases since Aug 12, 2026 · Purchases traded Aug 12, 2026 to Sep 10, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| WINMILL & CO. INC (See "Explanation of Responses") | $63K | Aug 12, 2026 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $61K | Aug 14, 2026 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $68K | Aug 18, 2026 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $75K | Aug 20, 2026 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $84K | Aug 24, 2026 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $86K | Aug 26, 2026 | SEC filing |
| Mark Campbell Winmill (CEO) | $21K | Sep 10, 2026 | SEC filing |
2 insiders bought in 30 days
$451K in purchases since Nov 12, 2025 · Purchases traded Nov 12, 2025 to Dec 5, 2025 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| WINMILL & CO. INC (See "Explanation of Responses") | $41K | Nov 12, 2025 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $69K | Nov 14, 2025 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $61K | Nov 18, 2025 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $62K | Nov 20, 2025 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $53K | Nov 24, 2025 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $49K | Nov 26, 2025 | SEC filing |
| WINMILL & CO. INC (See "Explanation of Responses") | $33K | Dec 1, 2025 | SEC filing |
| Mark Campbell Winmill (CEO) | $84K | Dec 5, 2025 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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