Global Self Storage

SELF · NASDAQ

$4.93−$0.06 (−1.20%)TodayMarket closed · Oct 20, 7:30 PM ET

Prev close $4.99

Who owns SELF

Largest institutional holders, from their latest 13F filings

The 10 largest institutions hold 26.9% of SELF’s shares.

Winmill & Co. Incorporated.5.6%
Vanguard Capital Management, LLC3.8%
Winmill (Mark Campbell)3.4%
BlackRock Financial Management, Inc.3.0%
Next 6 largest institutions11.1%
All other shareholders73.1%

Top institutional holders of SELF
Holder	Shares	% of shares	Change, last filing	Filed
Winmill & Co. Incorporated.	643.58K	5.64%	+57.08K	Aug 26, 2026
Vanguard Capital Management, LLC	434.49K	3.80%	+4.49K	Jun 30, 2026
Winmill (Mark Campbell)	390.58K	3.42%	+4.00K	May 14, 2026
BlackRock Financial Management, Inc.	340.38K	2.98%	+92.89K	Jun 30, 2026
Tuxis, Corp.	303.76K	2.66%	+0	Apr 9, 2026
Marathon Capital Management	260.78K	2.28%	+1.16K	Jun 30, 2026
Private Capital Management	223.34K	1.96%	+119.79K	Jun 30, 2026
Renaissance Technologies LLC	198.07K	1.73%	−18.10K	Jun 30, 2026
Geode Capital Management, L.L.C.	143.25K	1.25%	−1.01K	Jun 30, 2026
Investor Service Center, Inc.	135.10K	1.18%	+0	Apr 9, 2026

Largest mutual fund holders

Top mutual fund holders of SELF
Holder	Shares	% of shares	Change, last filing	Filed
Vanguard Total Stock Market Index Fund	312.82K	2.74%	+0	Jul 31, 2026
Vanguard Extended Market Index Fund	116.72K	1.02%	+0	Jul 31, 2026
Fidelity Extended Market Index Fund	67.00K	0.59%	−125	Jul 31, 2026
DFA Real Estate Securities Portfolio	43.98K	0.39%	+0	May 31, 2026
Commonwealth Real Estate Securities Fund	39.00K	0.34%	+0	Jul 31, 2026

Insider trades

Form 4 filings by officers, directors and large holders

Over the last 6 months, insiders bought $487.13K (18 trades) of SELF on the open market, with no sales.

Latest SELF insider transactions
Insider	Date	Type	Shares	Price	Value
WINMILL MARK CAMPBELL	Sep 10, 2026	Buy	292	$5.16	$1.51K
WINMILL MARK CAMPBELL	Sep 10, 2026	Buy	50	$5.16	$258
WINMILL MARK CAMPBELL	Sep 9, 2026	Buy	2.06K	$5.16	$10.62K
WINMILL MARK CAMPBELL	Sep 9, 2026	Buy	1.60K	$5.16	$8.26K
WINMILL & CO. INC	Aug 26, 2026	Buy	7.76K	$5.64	$43.76K
WINMILL & CO. INC	Aug 25, 2026	Buy	7.55K	$5.66	$42.69K
WINMILL & CO. INC	Aug 24, 2026	Buy	8.02K	$5.62	$45.05K
WINMILL & CO. INC	Aug 21, 2026	Buy	7.12K	$5.45	$38.81K
WINMILL & CO. INC	Aug 20, 2026	Buy	6.90K	$5.42	$37.42K
WINMILL & CO. INC	Aug 19, 2026	Buy	6.88K	$5.40	$37.16K

Short interest

Settled Sep 30, 2026

Shares short: 28.80K
Days to cover: 1.00
% of shares outstanding: 0.25%
Average daily volume: 49.84K
Change since last report: +72.2%

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