沃特斯通金融公司
US ˙ NasdaqGS ˙ US94188P1012

SecurityWSBF / Waterstone Financial, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership140,079 shares
Latest Disclosed Value $ 2,525,624
Northern Trust Corp reports 4.80% increase in ownership of WSBF / Waterstone Financial, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 140,079 shares of Waterstone Financial, Inc. (US:WSBF) valued at $2,525,624 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 133,668 shares of Waterstone Financial, Inc.. This represents a change in shares of 4.80% during the quarter. The current value of the position is $2,630,684 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F WATERSTONE FINL INC MD COM 94188P101 140,079 6,411 4.80 2,526 14.15 0.0001
2026-02-17 2025-12-31 13F WATERSTONE FINL INC MD COM 94188P101 133,668 -8,754 -6.15 2,212 -0.41 0.0001
2025-11-14 2025-09-30 13F WATERSTONE FINL INC MD COM 94188P101 142,422 -11,469 -7.45 2,222 4.52 0.0003
2025-08-13 2025-06-30 13F WATERSTONE FINL INC MD COM 94188P101 153,891 -5,799 -3.63 2,125 -1.02 0.0003
2025-05-13 2025-03-31 13F WATERSTONE FINL INC MD COM 94188P101 159,690 -3,861 -2.36 2,148 -2.32 0.0003
2025-02-14 2024-12-31 13F WATERSTONE FINL INC MD COM 94188P101 163,551 5,029 3.17 2,198 -5.67 0.0003
2024-11-13 2024-09-30 13F WATERSTONE FINL INC MD COM 94188P101 158,522 -11,399 -6.71 2,330 7.23 0.0004
2024-08-14 2024-06-30 13F WATERSTONE FINL INC MD COM 94188P101 169,921 -6,337 -3.60 2,173 1.31 0.0004
2024-05-14 2024-03-31 13F WATERSTONE FINL INC MD COM 94188P101 176,258 -4,676 -2.58 2,145 -16.50 0.0004
2024-02-13 2023-12-31 13F WATERSTONE FINL INC MD COM 94188P101 180,934 15,688 9.49 2,569 42.01 0.0005
2023-11-13 2023-09-30 13F WATERSTONE FINL INC MD COM 94188P101 165,246 -1,287 -0.77 1,809 -25.03 0.0004
2023-08-11 2023-06-30 13F WATERSTONE FINL INC MD COM 94188P101 166,533 -26,098 -13.55 2,413 -17.19 0.0005
2023-05-15 2023-03-31 13F WATERSTONE FINL INC MD COM 94188P101 192,631 -1,831 -0.94 2,915 -13.07 0.0006
2023-02-13 2022-12-31 13F WATERSTONE FINL INC MD COM 94188P101 194,462 -7,544 -3.73 3,353 2.70 0.0007
2022-11-14 2022-09-30 13F WATERSTONE FINL INC MD COM 94188P101 202,006 -7,675 -3.66 3,264 -8.70 0.0007
2022-08-12 2022-06-30 13F WATERSTONE FINL INC MD COM 94188P101 209,681 -9,160 -4.19 3,575 -15.52 0.0008
2022-05-13 2022-03-31 13F WATERSTONE FINL INC MD COM 94188P101 218,841 -6,401 -2.84 4,232 -14.05 0.0007
2022-02-08 2021-12-31 13F WATERSTONE FINL INC MD COM 94188P101 225,242 -21,054 -8.55 4,924 -2.42 0.0008
2021-11-15 2021-09-30 13F WATERSTONE FINL INC MD COM 94188P101 246,296 10,492 4.45 5,046 8.84 0.0009
2021-08-13 2021-06-30 13F WATERSTONE FINL INC MD COM 94188P101 235,804 -4,486 -1.87 4,636 -5.52 0.0008
2021-05-12 2021-03-31 13F WATERSTONE FINL INC MD COM 94188P101 240,290 -14,499 -5.69 4,907 2.31 0.0009
2021-02-11 2020-12-31 13F WATERSTONE FINL INC MD COM 94188P101 254,789 -15,948 -5.89 4,796 14.35 0.0009
2020-11-16 2020-09-30 13F WATERSTONE FINL INC MD COM 94188P101 270,737 -29,444 -9.81 4,194 -5.77 0.0009
2020-08-14 2020-06-30 13F WATERSTONE FINL INC MD COM 94188P101 300,181 -5,418 -1.77 4,451 0.18 0.0011
2020-05-14 2020-03-31 13F WATERSTONE FINL INC MD COM 94188P101 305,599 1,960 0.65 4,443 -23.10 0.0013
2020-02-14 2019-12-31 13F WATERSTONE FINL INC MD COM 94188P101 303,639 -7,932 -2.55 5,778 7.94 0.0013
2019-11-13 2019-09-30 13F WATERSTONE FINL INC MD COM 94188P101 311,571 -21,082 -6.34 5,353 -5.66 0.0013
2019-08-13 2019-06-30 13F WATERSTONE FINL INC MD COM 94188P101 332,653 8,655 2.67 5,674 6.39 0.0013
2019-05-13 2019-03-31 13F WATERSTONE FINL INC MD COM 94188P101 323,998 -4,278 -1.30 5,333 -3.07 0.0013
2019-02-12 2018-12-31 13F WATERSTONE FINL INC MD COM 94188P101 328,276 -3,489 -1.05 5,502 -3.30 0.0015
2018-11-14 2018-09-30 13F WATERSTONE FINL INC MD COM 94188P101 331,765 6,265 1.92 5,690 2.52 0.0014
2018-09-18 2018-06-30 13F/A-1 WATERSTONE FINL INC MD COM 94188P101 325,500 15,143 4.88 5,550 3.37 0.0014
2018-08-14 2018-06-30 13F WATERSTONE FINL INC MD COM 94188P101 327,421 17,064 5,583
2018-05-09 2018-03-31 13F WATERSTONE FINL INC MD COM 94188P101 310,357 1,174 0.38 5,369 1.84 0.0014
2018-02-14 2017-12-31 13F WATERSTONE FINL INC MD COM 94188P101 309,183 -6,703 -2.12 5,272 -14.42 0.0013
2017-11-13 2017-09-30 13F WATERSTONE FINL INC MD COM 94188P101 315,886 -3,988 -1.25 6,160 2.16 0.0016
2017-08-11 2017-06-30 13F WATERSTONE FINL INC MD COM 94188P101 319,874 20,150 6.72 6,030 10.22 0.0017
2017-05-12 2017-03-31 13F WATERSTONE FINL INC MD COM 94188P101 299,724 1,361 0.46 5,471 -0.35 0.0016
2017-02-13 2016-12-31 13F WATERSTONE FINL INC MD COM 94188P101 298,363 5,386 1.84 5,490 10.29 0.0017
2016-11-09 2016-09-30 13F WATERSTONE FINL INC MD COM 94188P101 292,977 -5,748 -1.92 4,978 8.71 0.0016
2016-08-12 2016-06-30 13F WATERSTONE FINL INC MD COM 94188P101 298,725 -12,107 -3.90 4,579 7.69 0.0015
2016-08-19 2016-03-31 13F/A-1 WATERSTONE FINL INC MD COM 94188P101 310,832 6,909 2.27 4,252 -0.79 0.0014
2016-05-13 2016-03-31 13F WATERSTONE FINL INC MD COM 94188P101 310,832 4,252
2016-02-12 2015-12-31 13F WATERSTONE FINL INC MD COM 94188P101 303,923 8,390 2.84 4,286 7.58 0.0014
2015-11-12 2015-09-30 13F WATERSTONE FINL INC MD COM 94188P101 295,533 295,533 0.00 3,984 0.0013
2015-08-13 2015-06-30 13F WATERSTONE FINL INC MD COM 94188P101 0 -353,522 -100.00 0 -100.00
2015-05-14 2015-03-31 13F WATERSTONE FINL INC MD COM 94188P101 353,522 573 0.16 4,539 -2.22 0.0014
2015-02-12 2014-12-31 13F WATERSTONE FINL INC MD COM 94188P101 352,949 539 0.15 4,642 14.05 0.0014
2014-11-13 2014-09-30 13F WATERSTONE FINL INC MD COM 94188P101 352,410 223,392 173.15 4,070 176.49 0.0013
2014-08-14 2014-06-30 13F WATERSTONE FINL INC MD COM 94188P101 129,018 15,095 13.25 1,472 24.32 0.0005
2014-05-14 2014-03-31 13F WATERSTONE FINL INC MD COM 94188P101 113,923 -236 -0.21 1,184 -6.55 0.0004
2014-02-21 2013-12-31 13F/A-1 WATERSTONE FINANCIAL COM 941888109 114,159 -1,915 -1.65 1,267 7.56 0.0004
2014-02-12 2013-12-31 13F WATERSTONE FINANCIAL COM 941888109 114,159 1,267
2013-11-13 2013-09-30 13F WATERSTONE FINANCIAL COM 941888109 116,074 -1,166 -0.99 1,178 -1.17 0.0004
2013-08-09 2013-06-30 13F WATERSTONE FINANCIAL COM 941888109 117,240 117,240 1,192 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.