Nasdaq · CIK 0001031235
SELF Global Self Storage, Inc.
Insider trading from SEC Form 4. Last filing 32 d ago. Close $4.90 on Oct 9, 2026, +7% from the 52-week low and -12% from the high.
Global Self Storage, Inc. (SELF) has 44 SEC Form 4 filings on file from 9 insiders, the latest filed on Sep 11, 2026. In the last 90 days insiders made 1 open-market buy worth $21k and 0 open-market sells worth $0, net +$21k.
20 open-market trades have been scored at SELF. The newest: Mark Campbell Winmill (President and CEO) bought $21k of stock on Sep 9, 2026, filed Sep 11, 2026, scored 25 (weak). The largest of the 20 shown: Tuxis Corp bought $101k on May 15, 2025, scored 46 (moderate). 3 insiders bought within 14 days of each other around Dec 3, 2025.
SELF closed at $4.90 on Oct 9, 2026, 7% above its 52-week low and 12% below its 52-week high.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at Global Self Storage, Inc., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 25Weak | Mark Campbell Winmill President and CEO buy | $21k 4,000 shares | +1% | - | |
| 25Weak | Mark Campbell Winmill President and CEO buy | $21k 4,000 shares | +1% | +13% from low-5% from high | |
| 52Moderate | Mark Campbell Winmill President and CEO buy | $84k 16,400 shares | +5% | +10% from low-8% from high | |
| 35Weak | Donald Klimoski II General Counsel buy | $2,252 446 shares | +1% | +8% from low-10% from high | |
| 34Weak | Winmill & Co. Inc other buy | $33k 6,404 shares | +5% | +10% from low-8% from high | |
| 38Weak | Winmill & Co. Inc other buy | $49k 9,420 shares | +7% | +11% from low-8% from high | |
| 48Moderate | Winmill & Co. Inc other buy | $53k 10,290 shares | +8% | +8% from low-10% from high | |
| 48Moderate | Winmill & Co. Inc other buy | $62k 12,096 shares | +11% | +8% from low-10% from high | |
| 33Weak | Winmill & Co. Inc other buy | $61k 11,844 shares | +12% | +9% from low-9% from high | |
| 34Weak | Winmill & Co. Inc other buy | $69k 13,729 shares | +16% | +8% from low-10% from high | |
| 32Weak | Winmill & Co. Inc other buy | $41k 8,124 shares | +11% | +6% from low-12% from high | |
| 29Weak | Winmill & Co. Inc other buy | $25k 4,592 shares | +6% | +15% from low-4% from high | |
| 35Weak | Winmill & Co. Inc other buy | $68k 12,686 shares | +22% | +14% from low-5% from high | |
| 18Weak | Russell E Burke III director buy | $551 105 shares | +0% | +10% from low-8% from high | |
| 36Weak | Winmill & Co. Inc other buy | $82k 15,611 shares | +36% | +10% from low-8% from high | |
| 29Weak | Winmill & Co. Inc other buy | $14k 2,662 shares | +7% | +8% from low-10% from high | |
| 40Moderate | Sally Coonrad Carroll director buy | $9,999 1,776 shares | +89% | +16% from low-2% from high | |
| 47Moderate | Mark Campbell Winmill President and CEO buy | $57k 10,000 shares | +3% | +18% from low0% from high | |
| 46Moderate | Tuxis Corp other buy | $101k 19,280 shares | +7% | +8% from low-2% from high | |
| 10Weak | Russell E Burke III director buy | $883 168 shares | +1% | - |
Transactions
The newest 50 of 67 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +1,600 | $5.16 | $8,256 | 370,182 | 32 d ago |
| Sep 9, 2026 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +2,058 | $5.16 | $11k | 372,240 | 32 d ago |
| Sep 10, 2026 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +50 | $5.16 | $258 | 372,290 | 32 d ago |
| Sep 10, 2026 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +292 | $5.16 | $1,507 | 372,582 | 32 d ago |
| May 14, 2026 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +4,000 | $5.33 | $21k | 368,582 | May 15, 2026 |
| May 12, 2026 | Russell E Burke III director | AGrant or award Common Stock | +94 | $5.31 | $499 | 38,181 | May 14, 2026 |
| May 12, 2026 | William Chester Zachary director | AGrant or award Common Stock | +94 | $5.31 | $499 | 18,100 | May 14, 2026 |
| Mar 31, 2026 | William Chester Zachary director | AGrant or award Common Stock | +2,739 | $5.11 | $14k | 18,006 | Apr 1, 2026 |
| Mar 31, 2026 | Russell E Burke III director | AGrant or award Common Stock | +2,739 | $5.11 | $14k | 38,087 | Apr 1, 2026 |
| Mar 24, 2026 | Mark Campbell Winmill President and CEO | AGrant or award Common Stock | +12,672 | $5.08 | $64k | 351,910 | Mar 25, 2026 |
| Mar 24, 2026 | Thomas OMalley Chief Financial Officer | AGrant or award Common Stock | +5,527 | $5.08 | $28k | 86,167 | Mar 25, 2026 |
| Mar 24, 2026 | Russell Kamerman Assistant General Counsel | AGrant or award Common Stock | +500 | $5.10 | $2,550 | 5,925 | Mar 25, 2026 |
| Mar 24, 2026 | Donald Klimoski II General Counsel | AGrant or award Common Stock | +5,527 | $5.08 | $28k | 92,027 | Mar 25, 2026 |
| Mar 24, 2026 | Donald Klimoski II General Counsel | AGrant or award Common Stock | +5,527 | $5.10 | $28k | 97,554 | Mar 25, 2026 |
| Mar 24, 2026 | Mark Campbell Winmill President and CEO | AGrant or award Common Stock | +12,672 | $5.10 | $65k | 364,582 | Mar 25, 2026 |
| Mar 24, 2026 | Thomas OMalley Chief Financial Officer | AGrant or award Common Stock | +5,527 | $5.10 | $28k | 91,694 | Mar 25, 2026 |
| Dec 3, 2025 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +6,000 | $5.13 | $31k | 328,838 | Dec 5, 2025 |
| Dec 4, 2025 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +6,000 | $5.14 | $31k | 334,838 | Dec 5, 2025 |
| Dec 5, 2025 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +800 | $5.05 | $4,040 | 335,638 | Dec 5, 2025 |
| Dec 5, 2025 | Mark Campbell Winmill President and CEO | POpen-market purchase Common Stock | +3,600 | $5.09 | $18k | 339,238 | Dec 5, 2025 |
| Dec 2, 2025 | Donald Klimoski II General Counsel | POpen-market purchase Common Stock | +446 | $5.05 | $2,252 | 86,500 | Dec 2, 2025 |
| Nov 28, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +3,342 | $5.16 | $17k | 144,579 | Dec 1, 2025 |
| Dec 1, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +3,062 | $5.18 | $16k | 147,641 | Dec 1, 2025 |
| Nov 25, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +4,547 | $5.18 | $24k | 136,364 | Nov 26, 2025 |
| Nov 26, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +4,873 | $5.17 | $25k | 141,237 | Nov 26, 2025 |
| Nov 21, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +6,226 | $5.09 | $32k | 127,753 | Nov 24, 2025 |
| Nov 24, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +4,064 | $5.14 | $21k | 131,817 | Nov 24, 2025 |
| Nov 19, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +6,226 | $5.13 | $32k | 115,657 | Nov 20, 2025 |
| Nov 20, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +5,870 | $5.08 | $30k | 121,527 | Nov 20, 2025 |
| Nov 17, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +6,226 | $5.12 | $32k | 103,813 | Nov 18, 2025 |
| Nov 18, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +5,618 | $5.16 | $29k | 109,431 | Nov 18, 2025 |
| Nov 13, 2025 | Russell E Burke III director | AGrant or award Common Stock | +248 | $5.03 | $1,247 | 35,348 | Nov 17, 2025 |
| Nov 13, 2025 | William Chester Zachary director | AGrant or award Common Stock | +2,584 | $5.03 | $13k | 15,267 | Nov 17, 2025 |
| Nov 13, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +6,694 | $5.03 | $34k | 90,552 | Nov 14, 2025 |
| Nov 14, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +7,035 | $5.09 | $36k | 97,587 | Nov 14, 2025 |
| Nov 11, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +2,069 | $4.97 | $10k | 77,803 | Nov 12, 2025 |
| Nov 12, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +6,055 | $5.03 | $30k | 83,858 | Nov 12, 2025 |
| Aug 29, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +4,592 | $5.48 | $25k | 75,734 | Aug 29, 2025 |
| Aug 27, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +5,477 | $5.36 | $29k | 63,933 | Aug 28, 2025 |
| Aug 28, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +7,209 | $5.42 | $39k | 71,142 | Aug 28, 2025 |
| Aug 25, 2025 | Russell E Burke III director | POpen-market purchase Common Stock | +105 | $5.25 | $551 | 35,100 | Aug 26, 2025 |
| Aug 25, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +7,823 | $5.22 | $41k | 50,668 | Aug 26, 2025 |
| Aug 26, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +7,788 | $5.26 | $41k | 58,456 | Aug 26, 2025 |
| Aug 21, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +502 | $5.12 | $2,570 | 40,685 | Aug 22, 2025 |
| Aug 22, 2025 | Winmill & Co. Inc other | POpen-market purchase Common Stock | +2,160 | $5.15 | $11k | 42,845 | Aug 22, 2025 |
| Aug 19, 2025 | Russell E Burke III director | AGrant or award Common Stock | +146 | $5.11 | $746 | 34,995 | Aug 20, 2025 |
| Aug 19, 2025 | William Chester Zachary director | AGrant or award Common Stock | +146 | $5.11 | $746 | 12,683 | Aug 20, 2025 |
| Jun 17, 2025 | Russell E Burke III director | AGrant or award Common Stock | +88 | $5.63 | $495 | 34,849 | Jun 18, 2025 |
| Jun 17, 2025 | William Chester Zachary director | AGrant or award Common Stock | +88 | $5.63 | $495 | 12,537 | Jun 18, 2025 |
| May 21, 2025 | Sally Coonrad Carroll director | POpen-market purchase Common Stock | +1,776 | $5.63 | $9,999 | 3,776 | May 22, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Russell E Burke IIIdirector
- Sally Coonrad Carrolldirector
- Russell KamermanAssistant General Counsel
- Donald Klimoski IIGeneral Counsel
- Thomas OMalleyChief Financial Officer
- Tuxis Corpother
- Winmill & Co. Incother
- Mark Campbell WinmillPresident and CEO
- William Chester Zacharydirector
Questions about SELF
Answered from the filings on this page, as of the latest one.
Are insiders buying SELF?
As of Sep 11, 2026, SEC Form 4 filings show 1 open-market buy worth $21k by 1 insider and 0 open-market sells worth $0 by 0 insiders at Global Self Storage, Inc. in the last 90 days, net +$21k. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade SELF on the open market?
Mark Campbell Winmill (President and CEO) bought $21k of SELF on Sep 9, 2026 and filed the Form 4 on Sep 11, 2026. InsiderTell scored 25 (weak).
How many insiders file Form 4 at Global Self Storage, Inc.?
9 people have filed a Form 4 at Global Self Storage, Inc., among them Russell E Burke III (director), Sally Coonrad Carroll (director), Russell Kamerman (Assistant General Counsel). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.