Company · Ownership research

Waterstone Financial, Inc. WSBF

CIK 0001569994 · CUSIP 94188P101

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 94188P101 (WSBF), not CUSIP 94188P901 (WSBF), and does not merge CUSIPs.

This page lists the top 20 of 123 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$27.15M 1,505,989 shares	0.00%	-26.73K(-1.70%)Reduced	SEC filing ↗ May 13, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$25.49M 1,413,502 shares	0.01%	-1.65K(-0.10%)Reduced	SEC filing ↗ May 7, 2026	▾
03	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$19.73M 1,094,471 shares	0.03%	-22.77K(-2.00%)Reduced	SEC filing ↗ May 14, 2026	▾
04	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$12.63M 700,237 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
05	STATE STREET CORP CIK 93751 · View history	$7.11M 394,515 shares	0.00%	-17.29K(-4.20%)Reduced	SEC filing ↗ May 15, 2026	▾
06	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$6.61M 366,680 shares	0.00%	-3.98K(-1.10%)Reduced	SEC filing ↗ May 15, 2026	▾
07	Fourthstone LLC CIK 1767803 · View history	$5.25M 291,191 shares	0.89%	+91.49K(+45.80%)Added	SEC filing ↗ May 15, 2026	▾
08	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$4.59M 254,464 shares	0.00%	+74.40K(+41.30%)Added	SEC filing ↗ May 15, 2026	▾
09	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$4.51M 250,085 shares	0.00%	+51.08K(+25.70%)Added	SEC filing ↗ May 15, 2026	▾
10	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$4.05M 224,794 shares	0.00%	+23.09K(+11.40%)Added	SEC filing ↗ May 15, 2026	▾
11	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$3.70M 205,116 shares	0.07%	+5.50K(+2.80%)Added	SEC filing ↗ May 15, 2026	▾
12	CSM Advisors, LLC CIK 1863523 · View history	$3.43M 190,125 shares	0.08%	-1.17K(-0.60%)Reduced	SEC filing ↗ May 15, 2026	▾
13	DONALD SMITH & CO., INC. CIK 814375 · View history	$3.17M 176,090 shares	0.06%	+48.32K(+37.80%)Added	SEC filing ↗ May 14, 2026	▾
14	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$3.01M 167,095 shares	0.00%	-21.40K(-11.40%)Reduced	SEC filing ↗ May 14, 2026	▾
15	MORGAN STANLEY CIK 895421 · View history	$2.77M 153,631 shares	0.00%	-24.99K(-14.00%)Reduced	SEC filing ↗ May 15, 2026	▾
16	Quantinno Capital Management LP CIK 1759654 · View history	$2.55M 141,411 shares	0.00%	+12.81K(+10.00%)Added	SEC filing ↗ May 15, 2026	▾
17	NORTHERN TRUST CORP CIK 73124 · View history	$2.53M 140,079 shares	0.00%	+6.41K(+4.80%)Added	SEC filing ↗ May 14, 2026	▾
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$2.29M 126,792 shares	0.00%	-5.48K(-4.10%)Reduced	SEC filing ↗ May 15, 2026	▾
19	Empowered Funds, LLC CIK 1592828 · Amended · View history	$2.21M 122,380 shares	0.01%	+12.43K(+11.30%)Added	SEC filing ↗ Jun 16, 2026	▾
20	VANGUARD FIDUCIARY TRUST CO CIK 933478 · Amended · View history	$1.68M 93,078 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾

Showing 20 / 123 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

123

Cancelled or null records excluded

Disclosed shares

9,412,926

Not deduplicated across managers

Disclosed value

$169.69M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Waterstone Financial, Inc. · Q1 2026

Explore all 123 reporting institutions.

This page includes 20 of 123 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.