Global Self Storage, Inc. (SELF) Insider Trading

Last 12 months

Insiders bought $137k on the open market and sold nothing.

Net open-market

+$137k

5 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

3 / 0

executives and directors

Last open-market buy

Sep 2026

Sep 10, 2026

Get an email when SELF's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 9 – 10	Mark Campbell Winmill President and CEO	Bought 4 parts	4,000	$5.16 average	$21k	1.1%	Form 4
Aug 25 – 26	Winmill & CO. INC Large holder	Bought 2 parts	15,308	$5.65 average	$86k	7.2%	Form 4
Aug 21 – 24	Winmill & CO. INC Large holder	Bought 2 parts	15,139	$5.54 average	$84k	7.6%	Form 4
Aug 19 – 20	Winmill & CO. INC Large holder	Bought 2 parts	13,778	$5.41 average	$75k	7.5%	Form 4
Aug 17 – 18	Winmill & CO. INC Large holder	Bought 2 parts	12,853	$5.33 average	$68k	7.5%	Form 4
Aug 13 – 14	Winmill & CO. INC Large holder	Bought 2 parts	11,658	$5.22 average	$61k	7.3%	Form 4
Aug 13	Russell E Burke III Director	Bought	1,625	$5.21	$8k	4.2%	Form 4
Aug 11 – 12	Winmill & CO. INC Large holder	Bought 2 parts	12,135	$5.16 average	$63k	8.2%	Form 4
May 14	Mark Campbell Winmill President and CEO	Bought	4,000	$5.33	$21k	1.1%	Form 4
Dec 3, 2025 – Dec 5, 2025	Mark Campbell Winmill President and CEO	Bought 4 parts	16,400	$5.12 average	$84k	5.1%	Form 4
Dec 2, 2025	Donald Klimoski II General Counsel	Bought	446	$5.05	$2k	0.5%	Form 4
Nov 28, 2025 – Dec 1, 2025	Winmill & CO. INC Large holder	Bought 2 parts	6,404	$5.17 average	$33k	4.5%	Form 4
Nov 25, 2025 – Nov 26, 2025	Winmill & CO. INC Large holder	Bought 2 parts	9,420	$5.17 average	$49k	7.1%	Form 4
Nov 21, 2025 – Nov 24, 2025	Winmill & CO. INC Large holder	Bought 2 parts	10,290	$5.11 average	$53k	8.5%	Form 4
Nov 19, 2025 – Nov 20, 2025	Winmill & CO. INC Large holder	Bought 2 parts	12,096	$5.11 average	$62k	11%	Form 4
Nov 17, 2025 – Nov 18, 2025	Winmill & CO. INC Large holder	Bought 2 parts	11,844	$5.14 average	$61k	12%	Form 4
Nov 13, 2025 – Nov 14, 2025	Winmill & CO. INC Large holder	Bought 2 parts	13,729	$5.06 average	$69k	16%	Form 4
Nov 11, 2025 – Nov 12, 2025	Winmill & CO. INC Large holder	Bought 2 parts	8,124	$5.01 average	$41k	11%	Form 4
Aug 29, 2025	Winmill & CO. INC Large holder	Bought	4,592	$5.48	$25k	6.5%	Form 4
Aug 27, 2025 – Aug 28, 2025	Winmill & CO. INC Large holder	Bought 2 parts	12,686	$5.39 average	$68k	22%	Form 4
Aug 25, 2025 – Aug 26, 2025	Winmill & CO. INC Large holder	Bought 2 parts	15,611	$5.24 average	$82k	36%	Form 4
Aug 25, 2025	Russell E Burke III Director	Bought	105	$5.25	$551	0.3%	Form 4
Aug 21, 2025 – Aug 22, 2025	Winmill & CO. INC Large holder	Bought 2 parts	2,662	$5.14 average	$14k	6.6%	Form 4
May 21, 2025	Sally Coonrad Carroll Director	Bought	1,776	$5.63	$10k	89%	Form 4
May 19, 2025	Mark Campbell Winmill President and CEO	Bought	10,000	$5.67	$57k	3.2%	Form 4
May 15, 2025 – May 16, 2025	Tuxis Corp Large holder	Bought 2 parts	19,280	$5.21 average	$101k	6.8%	Form 4
Nov 21, 2024	Russell E Burke III Director	Bought	168	$5.26	$884	0.5%	Form 4

Sep 9 – 10
Mark Campbell Winmill
President and CEO · bought 4,000 at avg $5.16
$21k
1.1% of stake
Aug 25 – 26
Winmill & CO. INC
Large holder · bought 15,308 at avg $5.65
$86k
7.2% of stake
Aug 21 – 24
Winmill & CO. INC
Large holder · bought 15,139 at avg $5.54
$84k
7.6% of stake
Aug 19 – 20
Winmill & CO. INC
Large holder · bought 13,778 at avg $5.41
$75k
7.5% of stake
Aug 17 – 18
Winmill & CO. INC
Large holder · bought 12,853 at avg $5.33
$68k
7.5% of stake
Aug 13 – 14
Winmill & CO. INC
Large holder · bought 11,658 at avg $5.22
$61k
7.3% of stake
Aug 13
Russell E Burke III
Director · bought 1,625 at $5.21
$8k
4.2% of stake
Aug 11 – 12
Winmill & CO. INC
Large holder · bought 12,135 at avg $5.16
$63k
8.2% of stake
May 14
Mark Campbell Winmill
President and CEO · bought 4,000 at $5.33
$21k
1.1% of stake
Dec 3, 2025 – Dec 5, 2025
Mark Campbell Winmill
President and CEO · bought 16,400 at avg $5.12
$84k
5.1% of stake
Dec 2, 2025
Donald Klimoski II
General Counsel · bought 446 at $5.05
$2k
0.5% of stake
Nov 28, 2025 – Dec 1, 2025
Winmill & CO. INC
Large holder · bought 6,404 at avg $5.17
$33k
4.5% of stake
Nov 25, 2025 – Nov 26, 2025
Winmill & CO. INC
Large holder · bought 9,420 at avg $5.17
$49k
7.1% of stake
Nov 21, 2025 – Nov 24, 2025
Winmill & CO. INC
Large holder · bought 10,290 at avg $5.11
$53k
8.5% of stake
Nov 19, 2025 – Nov 20, 2025
Winmill & CO. INC
Large holder · bought 12,096 at avg $5.11
$62k
11% of stake
Nov 17, 2025 – Nov 18, 2025
Winmill & CO. INC
Large holder · bought 11,844 at avg $5.14
$61k
12% of stake
Nov 13, 2025 – Nov 14, 2025
Winmill & CO. INC
Large holder · bought 13,729 at avg $5.06
$69k
16% of stake
Nov 11, 2025 – Nov 12, 2025
Winmill & CO. INC
Large holder · bought 8,124 at avg $5.01
$41k
11% of stake
Aug 29, 2025
Winmill & CO. INC
Large holder · bought 4,592 at $5.48
$25k
6.5% of stake
Aug 27, 2025 – Aug 28, 2025
Winmill & CO. INC
Large holder · bought 12,686 at avg $5.39
$68k
22% of stake
Aug 25, 2025 – Aug 26, 2025
Winmill & CO. INC
Large holder · bought 15,611 at avg $5.24
$82k
36% of stake
Aug 25, 2025
Russell E Burke III
Director · bought 105 at $5.25
$551
0.3% of stake
Aug 21, 2025 – Aug 22, 2025
Winmill & CO. INC
Large holder · bought 2,662 at avg $5.14
$14k
6.6% of stake
May 21, 2025
Sally Coonrad Carroll
Director · bought 1,776 at $5.63
$10k
89% of stake
May 19, 2025
Mark Campbell Winmill
President and CEO · bought 10,000 at $5.67
$57k
3.2% of stake
May 15, 2025 – May 16, 2025
Tuxis Corp
Large holder · bought 19,280 at avg $5.21
$101k
6.8% of stake
Nov 21, 2024
Russell E Burke III
Director · bought 168 at $5.26
$884
0.5% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch SELF, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in SELF's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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