SELF

Global Self Storage, Inc.Cluster buy · 3 insiders

Insider trading activity for Global Self Storage, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

+$465.8K

net buying

Bought(17 · 3 insiders): $465.8K
Sold(0 · 0 insiders): $0

Past 6 months

+$487.1K

net buying

Bought(18 · 3 insiders): $487.1K
Sold(0 · 0 insiders): $0

Past 12 months

+$940.7K

net buying

Bought(37 · 4 insiders): $940.7K
Sold(0 · 0 insiders): $0

Active cluster buy

3 insiders bought on the open market within 30 days.

All clusters →

SELF

Global Self Storage, Inc.

$464K

total bought

3 insiders15 buys86,154 shares

Aug 133 separate daysSep 9

Winmill & Co. IncSee "Explanation of…$436.7K
Winmill Mark CampbellPresident and CEO$18.9K
Burke Russell E IIIDirector$8.5K

Transaction history

The 70 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 10	Winmill Mark Campbell	President and CEO	PBUY	292	$5.16	$1.5K	+<0.1%	Open the original filing on SEC.gov
Sep 10	Winmill Mark Campbell	President and CEO	PBUY	50	$5.16	$258	+<0.1%	Open the original filing on SEC.gov
Sep 9	Winmill Mark Campbell	President and CEO	PBUY	2,058	$5.16	$10.6K	+0.6%	Open the original filing on SEC.gov
Sep 9	Winmill Mark Campbell	President and CEO	PBUY	1,600	$5.16	$8.3K	+0.4%	Open the original filing on SEC.gov
Aug 26	Winmill & Co. Inc	See "Explanation of…	PBUY	7,761	$5.64	$43.8K	+3.5%	Open the original filing on SEC.gov
Aug 25	Winmill & Co. Inc	See "Explanation of…	PBUY	7,547	$5.66	$42.7K	+3.5%	Open the original filing on SEC.gov
Aug 24	Winmill & Co. Inc	See "Explanation of…	PBUY	8,022	$5.62	$45K	+3.9%	Open the original filing on SEC.gov
Aug 21	Winmill & Co. Inc	See "Explanation of…	PBUY	7,117	$5.45	$38.8K	+3.6%	Open the original filing on SEC.gov
Aug 20	Winmill & Co. Inc	See "Explanation of…	PBUY	6,901	$5.42	$37.4K	+3.6%	Open the original filing on SEC.gov
Aug 19	Winmill & Co. Inc	See "Explanation of…	PBUY	6,877	$5.40	$37.2K	+3.7%	Open the original filing on SEC.gov
Aug 18	Winmill & Co. Inc	See "Explanation of…	PBUY	5,736	$5.32	$30.5K	+3.2%	Open the original filing on SEC.gov
Aug 17	Winmill & Co. Inc	See "Explanation of…	PBUY	7,117	$5.33	$37.9K	+4.2%	Open the original filing on SEC.gov
Aug 14	Winmill & Co. Inc	See "Explanation of…	PBUY	6,029	$5.23	$31.5K	+3.6%	Open the original filing on SEC.gov
Aug 13	Winmill & Co. Inc	See "Explanation of…	PBUY	5,629	$5.20	$29.3K	+3.5%	Open the original filing on SEC.gov
Aug 13	Burke Russell E III	Director	PBUY▲	1,625	$5.21	$8.5K	+4.2%	Open the original filing on SEC.gov
Aug 12	Winmill & Co. Inc	See "Explanation of…	PBUY	6,248	$5.15	$32.2K	+4.1%	Open the original filing on SEC.gov
Aug 11	Zachary William Chester	Director	AGRANT	196	$5.10	$1,000	+1.1%	Open the original filing on SEC.gov
Aug 11	Burke Russell E III	Director	AGRANT	196	$5.10	$1,000	+0.5%	Open the original filing on SEC.gov
Aug 11	Winmill & Co. Inc	See "Explanation of…	PBUY	5,887	$5.17	$30.4K	+4.0%	Open the original filing on SEC.gov
May 14	Winmill Mark Campbell	President and CEO	PBUY	4,000	$5.33	$21.3K	+1.1%	Open the original filing on SEC.gov
May 12	Zachary William Chester	Director	AGRANT	94	$5.31	$499	+0.5%	Open the original filing on SEC.gov
May 12	Burke Russell E III	Director	AGRANT	94	$5.31	$499	+0.3%	Open the original filing on SEC.gov
Mar 31	Zachary William Chester	Director	AGRANT	2,739	$5.11	$14K	+17.9%	Open the original filing on SEC.gov
Mar 31	Burke Russell E III	Director	AGRANT	2,739	$5.11	$14K	+7.8%	Open the original filing on SEC.gov
Mar 24	Klimoski Donald II	General Counsel	AGRANT	5,527	$5.10	$28.2K	+6.0%	Open the original filing on SEC.gov
Mar 24	Klimoski Donald II	General Counsel	AGRANT	5,527	$5.08	$28.1K	+6.4%	Open the original filing on SEC.gov
Mar 24	Kamerman Russell	Assistant General…	AGRANT	500	$5.10	$2.6K	+9.2%	Open the original filing on SEC.gov
Mar 24	OMalley Thomas	Chief Financial Officer	AGRANT	5,527	$5.10	$28.2K	+6.4%	Open the original filing on SEC.gov
Mar 24	OMalley Thomas	Chief Financial Officer	AGRANT	5,527	$5.08	$28.1K	+6.9%	Open the original filing on SEC.gov
Mar 24	Winmill Mark Campbell	President and CEO	AGRANT	12,672	$5.10	$64.6K	+3.6%	Open the original filing on SEC.gov
Mar 24	Winmill Mark Campbell	President and CEO	AGRANT	12,672	$5.08	$64.4K	+3.7%	Open the original filing on SEC.gov
Dec 5, 2025	Winmill Mark Campbell	President and CEO	PBUY	3,600	$5.09	$18.3K	+1.1%	Open the original filing on SEC.gov
Dec 5, 2025	Winmill Mark Campbell	President and CEO	PBUY	800	$5.05	$4K	+0.2%	Open the original filing on SEC.gov
Dec 4, 2025	Winmill Mark Campbell	President and CEO	PBUY	6,000	$5.14	$30.8K	+1.8%	Open the original filing on SEC.gov
Dec 3, 2025	Winmill Mark Campbell	President and CEO	PBUY	6,000	$5.13	$30.8K	+1.9%	Open the original filing on SEC.gov
Dec 2, 2025	Klimoski Donald II	General Counsel	PBUY★	446	$5.05	$2.3K	+0.5%	Open the original filing on SEC.gov
Dec 1, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	3,062	$5.18	$15.9K	+2.1%	Open the original filing on SEC.gov
Nov 28, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	3,342	$5.16	$17.2K	+2.4%	Open the original filing on SEC.gov
Nov 26, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	4,873	$5.17	$25.2K	+3.6%	Open the original filing on SEC.gov
Nov 25, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	4,547	$5.18	$23.6K	+3.5%	Open the original filing on SEC.gov
Nov 24, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	4,064	$5.14	$20.9K	+3.2%	Open the original filing on SEC.gov
Nov 21, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	6,226	$5.09	$31.7K	+5.1%	Open the original filing on SEC.gov
Nov 20, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	5,870	$5.08	$29.8K	+5.1%	Open the original filing on SEC.gov
Nov 19, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	6,226	$5.13	$32K	+5.7%	Open the original filing on SEC.gov
Nov 18, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	5,618	$5.16	$29K	+5.4%	Open the original filing on SEC.gov
Nov 17, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	6,226	$5.12	$31.9K	+6.4%	Open the original filing on SEC.gov
Nov 14, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	7,035	$5.09	$35.8K	+7.8%	Open the original filing on SEC.gov
Nov 13, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	6,694	$5.03	$33.6K	+8.0%	Open the original filing on SEC.gov
Nov 13, 2025	Zachary William Chester	Director	AGRANT	2,584	$5.03	$13K	+20.4%	Open the original filing on SEC.gov
Nov 13, 2025	Burke Russell E III	Director	AGRANT	248	$5.03	$1.2K	+0.7%	Open the original filing on SEC.gov
Nov 12, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	6,055	$5.03	$30.4K	+7.8%	Open the original filing on SEC.gov
Nov 11, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	2,069	$4.97	$10.3K	+2.7%	Open the original filing on SEC.gov
Aug 29, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	4,592	$5.48	$25.2K	+6.5%	Open the original filing on SEC.gov
Aug 28, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	7,209	$5.42	$39.1K	+11.3%	Open the original filing on SEC.gov
Aug 27, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	5,477	$5.36	$29.3K	+9.4%	Open the original filing on SEC.gov
Aug 26, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	7,788	$5.26	$41K	+15.4%	Open the original filing on SEC.gov
Aug 25, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY▲	7,823	$5.22	$40.8K	+18.3%	Open the original filing on SEC.gov
Aug 25, 2025	Burke Russell E III	Director	PBUY	105	$5.25	$551	+0.3%	Open the original filing on SEC.gov
Aug 22, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY▲	2,160	$5.15	$11.1K	+5.3%	Open the original filing on SEC.gov
Aug 21, 2025	Winmill & Co. Inc	See "Explanation of…	PBUY	502	$5.12	$2.6K	+1.3%	Open the original filing on SEC.gov
Aug 19, 2025	Zachary William Chester	Director	AGRANT	146	$5.11	$746	+1.2%	Open the original filing on SEC.gov
Aug 19, 2025	Burke Russell E III	Director	AGRANT	146	$5.11	$746	+0.4%	Open the original filing on SEC.gov
Jun 17, 2025	Zachary William Chester	Director	AGRANT	88	$5.63	$495	+0.7%	Open the original filing on SEC.gov
Jun 17, 2025	Burke Russell E III	Director	AGRANT	88	$5.63	$495	+0.3%	Open the original filing on SEC.gov
May 21, 2025	Carroll Sally Coonrad	Director	PBUY	1,776	$5.63	$10K	+88.8%	Open the original filing on SEC.gov
May 20, 2025	Zachary William Chester	Director	AGRANT	87	$5.70	$496	+0.7%	Open the original filing on SEC.gov
May 20, 2025	Burke Russell E III	Director	AGRANT	87	$5.70	$496	+0.3%	Open the original filing on SEC.gov
May 19, 2025	Winmill Mark Campbell	President and CEO	PBUY	10,000	$5.67	$56.7K	+3.2%	Open the original filing on SEC.gov
May 16, 2025	Tuxis Corp	See "Explanation of…	PBUY	9,600	$5.22	$50.2K	+3.3%	Open the original filing on SEC.gov
May 15, 2025	Tuxis Corp	See "Explanation of…	PBUY	9,680	$5.21	$50.4K	+3.4%	Open the original filing on SEC.gov

PBUY$1.5K

Winmill Mark Campbell · President and CEOSep 10

292 sh @ $5.16 · +<0.1% own

PBUY$258

Winmill Mark Campbell · President and CEOSep 10

50 sh @ $5.16 · +<0.1% own

PBUY$10.6K

Winmill Mark Campbell · President and CEOSep 9

2,058 sh @ $5.16 · +0.6% own

PBUY$8.3K

Winmill Mark Campbell · President and CEOSep 9

1,600 sh @ $5.16 · +0.4% own

PBUY$43.8K

Winmill & Co. Inc · See "Explanation…Aug 26

7,761 sh @ $5.64 · +3.5% own

PBUY$42.7K

Winmill & Co. Inc · See "Explanation…Aug 25

7,547 sh @ $5.66 · +3.5% own

PBUY$45K

Winmill & Co. Inc · See "Explanation…Aug 24

8,022 sh @ $5.62 · +3.9% own

PBUY$38.8K

Winmill & Co. Inc · See "Explanation…Aug 21

7,117 sh @ $5.45 · +3.6% own

PBUY$37.4K

Winmill & Co. Inc · See "Explanation…Aug 20

6,901 sh @ $5.42 · +3.6% own

PBUY$37.2K

Winmill & Co. Inc · See "Explanation…Aug 19

6,877 sh @ $5.40 · +3.7% own

PBUY$30.5K

Winmill & Co. Inc · See "Explanation…Aug 18

5,736 sh @ $5.32 · +3.2% own

PBUY$37.9K

Winmill & Co. Inc · See "Explanation…Aug 17

7,117 sh @ $5.33 · +4.2% own

PBUY$31.5K

Winmill & Co. Inc · See "Explanation…Aug 14

6,029 sh @ $5.23 · +3.6% own

PBUY$29.3K

Winmill & Co. Inc · See "Explanation…Aug 13

5,629 sh @ $5.20 · +3.5% own

PBUY▲$8.5K

Burke Russell E III · DirectorAug 13

1,625 sh @ $5.21 · +4.2% own

PBUY$32.2K

Winmill & Co. Inc · See "Explanation…Aug 12

6,248 sh @ $5.15 · +4.1% own

AGRANT$1,000

Zachary William Chester · DirectorAug 11

196 sh @ $5.10 · +1.1% own

AGRANT$1,000

Burke Russell E III · DirectorAug 11

196 sh @ $5.10 · +0.5% own

PBUY$30.4K

Winmill & Co. Inc · See "Explanation…Aug 11

5,887 sh @ $5.17 · +4.0% own

PBUY$21.3K

Winmill Mark Campbell · President and CEOMay 14

4,000 sh @ $5.33 · +1.1% own

AGRANT$499

Zachary William Chester · DirectorMay 12

94 sh @ $5.31 · +0.5% own

AGRANT$499

Burke Russell E III · DirectorMay 12

94 sh @ $5.31 · +0.3% own

AGRANT$14K

Zachary William Chester · DirectorMar 31

2,739 sh @ $5.11 · +17.9% own

AGRANT$14K

Burke Russell E III · DirectorMar 31

2,739 sh @ $5.11 · +7.8% own

AGRANT$28.2K

Klimoski Donald II · General CounselMar 24

5,527 sh @ $5.10 · +6.0% own

AGRANT$28.1K

Klimoski Donald II · General CounselMar 24

5,527 sh @ $5.08 · +6.4% own

AGRANT$2.6K

Kamerman Russell · Assistant General…Mar 24

500 sh @ $5.10 · +9.2% own

AGRANT$28.2K

OMalley Thomas · Chief Financial…Mar 24

5,527 sh @ $5.10 · +6.4% own

AGRANT$28.1K

OMalley Thomas · Chief Financial…Mar 24

5,527 sh @ $5.08 · +6.9% own

AGRANT$64.6K

Winmill Mark Campbell · President and CEOMar 24

12,672 sh @ $5.10 · +3.6% own

AGRANT$64.4K

Winmill Mark Campbell · President and CEOMar 24

12,672 sh @ $5.08 · +3.7% own

PBUY$18.3K

Winmill Mark Campbell · President and CEODec 5, 2025

3,600 sh @ $5.09 · +1.1% own

PBUY$4K

Winmill Mark Campbell · President and CEODec 5, 2025

800 sh @ $5.05 · +0.2% own

PBUY$30.8K

Winmill Mark Campbell · President and CEODec 4, 2025

6,000 sh @ $5.14 · +1.8% own

PBUY$30.8K

Winmill Mark Campbell · President and CEODec 3, 2025

6,000 sh @ $5.13 · +1.9% own

PBUY★$2.3K

Klimoski Donald II · General CounselDec 2, 2025

446 sh @ $5.05 · +0.5% own

PBUY$15.9K

Winmill & Co. Inc · See "Explanation…Dec 1, 2025

3,062 sh @ $5.18 · +2.1% own

PBUY$17.2K

Winmill & Co. Inc · See "Explanation…Nov 28, 2025

3,342 sh @ $5.16 · +2.4% own

PBUY$25.2K

Winmill & Co. Inc · See "Explanation…Nov 26, 2025

4,873 sh @ $5.17 · +3.6% own

PBUY$23.6K

Winmill & Co. Inc · See "Explanation…Nov 25, 2025

4,547 sh @ $5.18 · +3.5% own

PBUY$20.9K

Winmill & Co. Inc · See "Explanation…Nov 24, 2025

4,064 sh @ $5.14 · +3.2% own

PBUY$31.7K

Winmill & Co. Inc · See "Explanation…Nov 21, 2025

6,226 sh @ $5.09 · +5.1% own

PBUY$29.8K

Winmill & Co. Inc · See "Explanation…Nov 20, 2025

5,870 sh @ $5.08 · +5.1% own

PBUY$32K

Winmill & Co. Inc · See "Explanation…Nov 19, 2025

6,226 sh @ $5.13 · +5.7% own

PBUY$29K

Winmill & Co. Inc · See "Explanation…Nov 18, 2025

5,618 sh @ $5.16 · +5.4% own

PBUY$31.9K

Winmill & Co. Inc · See "Explanation…Nov 17, 2025

6,226 sh @ $5.12 · +6.4% own

PBUY$35.8K

Winmill & Co. Inc · See "Explanation…Nov 14, 2025

7,035 sh @ $5.09 · +7.8% own

PBUY$33.6K

Winmill & Co. Inc · See "Explanation…Nov 13, 2025

6,694 sh @ $5.03 · +8.0% own

AGRANT$13K

Zachary William Chester · DirectorNov 13, 2025

2,584 sh @ $5.03 · +20.4% own

AGRANT$1.2K

Burke Russell E III · DirectorNov 13, 2025

248 sh @ $5.03 · +0.7% own

PBUY$30.4K

Winmill & Co. Inc · See "Explanation…Nov 12, 2025

6,055 sh @ $5.03 · +7.8% own

PBUY$10.3K

Winmill & Co. Inc · See "Explanation…Nov 11, 2025

2,069 sh @ $4.97 · +2.7% own

PBUY$25.2K

Winmill & Co. Inc · See "Explanation…Aug 29, 2025

4,592 sh @ $5.48 · +6.5% own

PBUY$39.1K

Winmill & Co. Inc · See "Explanation…Aug 28, 2025

7,209 sh @ $5.42 · +11.3% own

PBUY$29.3K

Winmill & Co. Inc · See "Explanation…Aug 27, 2025

5,477 sh @ $5.36 · +9.4% own

PBUY$41K

Winmill & Co. Inc · See "Explanation…Aug 26, 2025

7,788 sh @ $5.26 · +15.4% own

PBUY▲$40.8K

Winmill & Co. Inc · See "Explanation…Aug 25, 2025

7,823 sh @ $5.22 · +18.3% own

PBUY$551

Burke Russell E III · DirectorAug 25, 2025

105 sh @ $5.25 · +0.3% own

PBUY▲$11.1K

Winmill & Co. Inc · See "Explanation…Aug 22, 2025

2,160 sh @ $5.15 · +5.3% own

PBUY$2.6K

Winmill & Co. Inc · See "Explanation…Aug 21, 2025

502 sh @ $5.12 · +1.3% own

AGRANT$746

Zachary William Chester · DirectorAug 19, 2025

146 sh @ $5.11 · +1.2% own

AGRANT$746

Burke Russell E III · DirectorAug 19, 2025

146 sh @ $5.11 · +0.4% own

AGRANT$495

Zachary William Chester · DirectorJun 17, 2025

88 sh @ $5.63 · +0.7% own

AGRANT$495

Burke Russell E III · DirectorJun 17, 2025

88 sh @ $5.63 · +0.3% own

PBUY$10K

Carroll Sally Coonrad · DirectorMay 21, 2025

1,776 sh @ $5.63 · +88.8% own

AGRANT$496

Zachary William Chester · DirectorMay 20, 2025

87 sh @ $5.70 · +0.7% own

AGRANT$496

Burke Russell E III · DirectorMay 20, 2025

87 sh @ $5.70 · +0.3% own

PBUY$56.7K

Winmill Mark Campbell · President and CEOMay 19, 2025

10,000 sh @ $5.67 · +3.2% own

PBUY$50.2K

Tuxis Corp · See "Explanation…May 16, 2025

9,600 sh @ $5.22 · +3.3% own

PBUY$50.4K

Tuxis Corp · See "Explanation…May 15, 2025

9,680 sh @ $5.21 · +3.4% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 42 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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