Save your place

Sign in to WhoBought

Please try again later.

Waterstone Financial, Inc. (WSBF) institutional ownership

Market cap$252M SectorFinancial Services
Funds holding · Q1 2026
103
reported WSBF position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
59 buyers · 44 sellers

Waterstone Financial, Inc. (WSBF) price and institutional activity

Dates

Q1 2026

$0 bought by 59 investors
Fourthstone LLCGoldman Sachs Group Inc +57 more
$0 sold by 44 investors
Two Sigma Advisers, LPBlackRock +42 more
Sign in to see who bought
Bought Sold Totals per quarter; hover a bar for the names.

Waterstone Financial, Inc. (WSBF) institutional activity · 103

Investor Type Est. change Change Δ Own Date
Fourthstone LLC · Added
Change +91K Date Q1 2026
Fourthstone LLC Added· Q1 2026 +91K Q1 2026
Goldman Sachs Group Inc · Added
Change +74K Date Q1 2026
Goldman Sachs Group Inc Added· Q1 2026 +74K Q1 2026
American Century Companies Inc · Added
Change +51K Date Q1 2026
American Century Companies Inc Added· Q1 2026 +51K Q1 2026
Donald Smith & Co., Inc. · Added
Change +48K Date Q1 2026
Donald Smith & Co., Inc. Added· Q1 2026 +48K Q1 2026
Two Sigma Advisers, LP · Exited
Change −47K Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −47K −100.0% Q1 2026
Citadel Advisors LLC Added· Q1 2026 +29K +260.5% Q1 2026
BlackRock · Reduced
Change −27K Date Q1 2026
BlackRock Reduced· Q1 2026 −27K Q1 2026
Morgan Stanley · Reduced
Change −25K Date Q1 2026
Morgan Stanley Reduced· Q1 2026 −25K Q1 2026
AQR Capital Management LLC · Added
Change +23K Date Q1 2026
AQR Capital Management LLC Added· Q1 2026 +23K Q1 2026
Renaissance Technologies LLC Reduced· Q1 2026 −23K −2.0% Q1 2026
Ritholtz Wealth Management · Added
Change +22K Date Q1 2026
Ritholtz Wealth Management Added· Q1 2026 +22K Q1 2026
Gsa Capital Partners LLP · Exited
Change −22K Δ Own −100.0% Date Q1 2026
Gsa Capital Partners LLP Exited· Q1 2026 −22K −100.0% Q1 2026
Arrowstreet Capital, Limited Partnership · Reduced
Change −21K Date Q1 2026
Arrowstreet Capital, Limited Partnership Reduced· Q1 2026 −21K Q1 2026
JPMorgan Chase & Co · Reduced
Change −21K Date Q1 2026
JPMorgan Chase & Co Reduced· Q1 2026 −21K Q1 2026
Barclays PLC · Reduced
Change −19K Date Q1 2026
Barclays PLC Reduced· Q1 2026 −19K Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 103

Famous investor activity in Waterstone Financial, Inc. (WSBF)

Waterstone Financial, Inc. (WSBF) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Gerke Mark Raymond · CFO Sell −$183K
Price $18.34 Qty −10K Owned 30K Trade date May 21, 2026 Filed date May 22, 2026
Gerke Mark Raymond CFO Sell $18.34 −10K −$183K 30K May 21, 2026 May 22, 2026
Gerke Mark Raymond · CFO 2 operations 0
Price $14.98 Owned 0 Trade date May 21, 2026 Filed date May 22, 2026
Gerke Mark Raymond CFO 2 operations $14.98 0 0 May 21, 2026 May 22, 2026
Gordon Douglas S. · Director Sell −$52K
Price $18.11 Qty −3K Owned 557K Trade date Feb 18, 2026 Filed date Feb 20, 2026
Gordon Douglas S. Director Sell $18.11 −3K −$52K 557K Feb 18, 2026 Feb 20, 2026
Gordon Douglas S. · Director Sell −$124K
Price $18.27 Qty −7K Owned 560K Trade date Feb 6, 2026 Filed date Feb 10, 2026
Gordon Douglas S. Director Sell $18.27 −7K −$124K 560K Feb 6, 2026 Feb 10, 2026
Gordon Douglas S. · Director Sell −$342K
Price $18.25 Qty −19K Owned 566K Trade date Feb 5, 2026 Filed date Feb 6, 2026
Gordon Douglas S. Director Sell $18.25 −19K −$342K 566K Feb 5, 2026 Feb 6, 2026
Gordon Douglas S. · Director Sell −$278K
Price $18.55 Qty −15K Owned 585K Trade date Feb 4, 2026 Filed date Feb 6, 2026
Gordon Douglas S. Director Sell $18.55 −15K −$278K 585K Feb 4, 2026 Feb 6, 2026
Lawton Patrick S. · Director Sell −$359K
Price $18.64 Qty −19K Owned 0 Trade date Feb 4, 2026 Filed date Feb 5, 2026
Lawton Patrick S. Director Sell $18.64 −19K −$359K 0 Feb 4, 2026 Feb 5, 2026
Lawton Patrick S. · Director Sell −$556K
Price $18.53 Qty −30K Owned 19K Trade date Feb 3, 2026 Filed date Feb 5, 2026
Lawton Patrick S. Director Sell $18.53 −30K −$556K 19K Feb 3, 2026 Feb 5, 2026
Glynn Julie Ann · Officer 2 operations −$381K
Price $18.17–$18.69 Qty −21K Owned 9K Trade date Feb 2, 2026 Filed date Feb 4, 2026
Glynn Julie Ann Officer 2 operations $18.17–$18.69 −21K −$381K 9K Feb 2, 2026 Feb 4, 2026
Glynn Julie Ann · Officer 2 operations 0
Price $17.35 Owned 0 Trade date Feb 2, 2026 Filed date Feb 4, 2026
Glynn Julie Ann Officer 2 operations $17.35 0 0 Feb 2, 2026 Feb 4, 2026
Hansen Michael L. · Director 2 operations −$1.2M
Price $15.16 Qty −81K Owned 0 Trade date Oct 27, 2025 Filed date Oct 28, 2025
Hansen Michael L. Director 2 operations $15.16 −81K −$1.2M 0 Oct 27, 2025 Oct 28, 2025
Hansen Michael L. · Director Sell −$1.5M
Price $14.05 Qty −110K Owned 2K Trade date Aug 13, 2025 Filed date Aug 14, 2025
Hansen Michael L. Director Sell $14.05 −110K −$1.5M 2K Aug 13, 2025 Aug 14, 2025
Hansen Michael L. · Director Sell −$491K
Price $13.92 Qty −35K Owned 111K Trade date Aug 12, 2025 Filed date Aug 14, 2025
Hansen Michael L. Director Sell $13.92 −35K −$491K 111K Aug 12, 2025 Aug 14, 2025
Hansen Michael L. · Director Sell −$38K
Price $13.80 Qty −3K Owned 146K Trade date Aug 11, 2025 Filed date Aug 12, 2025
Hansen Michael L. Director Sell $13.80 −3K −$38K 146K Aug 11, 2025 Aug 12, 2025
Hansen Michael L. · Director 3 operations −$13K
Price $13.81–$13.82 Qty −961 Owned 149K Trade date Jul 25, 2025 Filed date Jul 28, 2025
Hansen Michael L. Director 3 operations $13.81–$13.82 −961 −$13K 149K Jul 25, 2025 Jul 28, 2025
15 of 16
15 of 16 Sign in to continue to older insider transactions.

Waterstone Financial, Inc. (WSBF) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Principal Financial Group Inc 2.3M
% of shares outstanding 11.2% Filing date Feb 12, 2024
Principal Financial Group Inc 2.3M 11.2% Feb 12, 2024
BlackRock Inc. 1.7M
% of shares outstanding 8.1% Filing date Jan 25, 2024
BlackRock Inc. 1.7M 8.1% Jan 25, 2024
Dimensional Fund Advisors LP 1.9M
% of shares outstanding 7.4% Filing date Feb 8, 2022
Dimensional Fund Advisors LP 1.9M 7.4% Feb 8, 2022
Renaissance Technologies LLC 1.8M
% of shares outstanding 7.2% Filing date Feb 11, 2022
Renaissance Technologies LLC 1.8M 7.2% Feb 11, 2022
The Vanguard Group 943K
% of shares outstanding 4.9% Filing date Jan 31, 2025
The Vanguard Group 943K 4.9% Jan 31, 2025
5 of 5

Waterstone Financial, Inc. (WSBF) ownership FAQ

Who owns WSBF?

103 reporting institutions disclosed WSBF position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.