Ticker · CUSIP 94188P101

WSBF

WATERSTONE FINL INC MD

Financial Services·Banks - Regional

···Share

Holders (tracked)

Combined shares

1,478,407

Combined value

$24.47M

Last close

$18.54

Quarter

2025Q4

Price is +12.0% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$18.54+6.83 (+58.27%)H $18.76 · L $11.54 · Avg Vol 54K

Position opened

Tracked holders · last 8 quarters

Flat over the last 8 quarters.

SEC event timeline

11 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−53,933 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−4,554 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−5,026 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−10,768 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+35,828 shares · 2025Q4
Position
Renaissance Technologies trimmed2026-02-12
−34,400 shares · 2025Q4
Position
AQR Capital Management added2025-11-14
+84,495 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+9,041 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+16,105 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−4,033 shares · 2025Q3
Position
Renaissance Technologies added2025-11-13
+16,700 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for WSBF →

Follow-the-investor returns

If you'd copied each holder of WSBF…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ken Griffin (Citadel Advisors)	2016Q3	$13.29	+39.5%	$203K
Mario Gabelli (GAMCO)	2025Q2	$13.81	+34.3%	$185K
Izzy Englander (Millennium Mgmt)	2016Q1	$14.14	+31.1%	$313K
Two Sigma Investments	2016Q3	$14.30	+29.7%	$1.4M
Renaissance Technologies	2016Q1	$14.38	+28.9%	$20.7M
D.E. Shaw & Co.	2016Q1	$14.59	+27.0%	$852K
AQR Capital Management	2016Q1	$15.21	+21.9%	$3.7M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions0

—

Added to1

AQR Capital Management
+35,828
$593K

Trimmed5

Ken Griffin (Citadel Advisors)
−53,933
$893K
Renaissance Technologies
−34,400
$569K
Izzy Englander (Millennium Mgmt)
−10,768
$178K
D.E. Shaw & Co.
−5,026
$83K
Two Sigma Investments
−4,554
$75K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	8	3,925,796	$75.9M	—
2022Q2	5	3,639,969	$62.1M	-3
2022Q3	8	3,402,480	$55.0M	+3
2022Q4	9	3,336,073	$57.5M	+1
2023Q1	8	3,190,440	$48.3M	-1
2023Q2	9	3,163,099	$45.8M	+1
2023Q3	7	3,123,746	$34.2M	-2
2023Q4	7	3,071,989	$43.6M	—
2024Q1	7	2,925,416	$35.6M	—
2024Q2	5	2,932,502	$37.5M	-2
2024Q3	5	1,331,274	$19.6M	—
2024Q4	6	1,357,404	$18.2M	+1
2025Q1	6	1,377,406	$18.5M	—
2025Q2	7	1,463,395	$20.2M	+1
2025Q3	7	1,551,260	$24.2M	—
2025Q4	7	1,478,407	$24.5M	—

Who owns WSBF

7 super-investors · 2025Q4

Tracked stake

1.48M

Combined value

$24M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added1Trim5Held1

#	Manager	Shares	Value	% of book	Last action
1	Renaissance Technologies	1.12M	$18M	0.0%	Trim−34.4K
2	AQR Capital Management	201.7K	$3M	0.0%	Added+35.8K
3	Two Sigma Investments	75.7K	$1M	0.0%	Trim−4.6K
4	D.E. Shaw & Co.	45.9K	$760K	0.0%	Trim−5.0K
5	Izzy Englander Millennium Mgmt	16.9K	$279K	0.0%	Trim−10.8K
6	Ken Griffin Citadel Advisors	10.9K	$181K	0.0%	Trim−53.9K
7	Mario Gabelli GAMCO	10.0K	$166K	0.0%	Held

Recent moves

20 transactions

TRIMD.E. Shaw & Co.
−5,026 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−53,933 · 2025Q4
ADDAQR Capital Management
+35,828 · 2025Q4
TRIMTwo Sigma Investments
−4,554 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−10,768 · 2025Q4
TRIMRenaissance Technologies
−34,400 · 2025Q4
ADDAQR Capital Management
+84,495 · 2025Q3
TRIMD.E. Shaw & Co.
−4,033 · 2025Q3
ADDTwo Sigma Investments
+16,105 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+9,041 · 2025Q3
ADDRenaissance Technologies
+16,700 · 2025Q3
ADDTwo Sigma Investments
+43,615 · 2025Q2
ADDAQR Capital Management
+35,786 · 2025Q2
ADDD.E. Shaw & Co.
+8,791 · 2025Q2
TRIMIzzy Englander (Millennium Mgmt)
−10,224 · 2025Q2
NEWMario Gabelli (GAMCO)
+10,000 · 2025Q2
TRIMRenaissance Technologies
−21,100 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+6,955 · 2025Q1
TRIMTwo Sigma Investments
−3,935 · 2025Q1
ADDD.E. Shaw & Co.
+8,977 · 2025Q1

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