MANGROVE PARTNERS IM, LLC WSBK — WINCHESTER BANCORP INC

Ownership history in MANGROVE PARTNERS IM, LLC  ·  4 quarters on record

AI Ownership Summary

MANGROVE PARTNERS IM, LLC reported WINCHESTER BANCORP INC (WSBK) in 4 quarterly 13F filings from 2025 Q2 through 2026 Q1. Peak portfolio weight reached 0.19% in 2026 Q1. The latest visible filing shows WSBK at 0.19% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this WSBK ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was MANGROVE PARTNERS IM, LLC's position in WINCHESTER BANCORP INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

WSBK was reported at 0.19% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.19% in 2026 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2025 Q2 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

WSBK stock page MANGROVE PARTNERS IM, LLC fund profile MANGROVE PARTNERS IM, LLC full holdings
How MANGROVE PARTNERS IM, LLC held WSBK — position size vs. price
% of Fund (quarterly)    WSBK price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 4 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 UNCHANGED — — — 186,201 — 0% 0.19% $2.4M 2026-05-15 $12.68
2025 Q4 REDUCED — — — 186,201 -748 -0.4% 0.16% $1.9M 2026-02-17 $13.27
2025 Q3 ADDED — — — 186,949 +17,851 +10.6% 0.13% $1.8M 2025-11-14 $9.57
2025 Q2 INITIATED — — — 169,098 — — 0.16% $1.5M 2025-08-14 $9.30

🏢 Other funds also holding WSBK

As of 2026 Q1 — sorted by position size

Northstar Financial Companies, Inc. 0.71% Oppenheimer & Close, LLC 3Y 7Y 0.4% M3F, Inc. 3Y 7Y 0.08% EagleClaw Capital Managment, LLC 3Y 7Y 0.03% Integrated Wealth Concepts LLC 3Y 7Y 0.01% Steward Partners Investment Advisory, LLC 3Y 7Y 0.0% RENAISSANCE TECHNOLOGIES LLC 3Y 7Y 0.0% EASTERN BANK 3Y 7Y 0.0% Tower Research Capital LLC (TRC) 3Y 7Y 0.0% ALLIANCEBERNSTEIN L.P. 3Y 7Y 0.0%

FAQ About MANGROVE PARTNERS IM, LLC and WSBK

These are the practical questions this page is built to answer before you even open the full history table.

How long has MANGROVE PARTNERS IM, LLC reported owning WSBK?

MANGROVE PARTNERS IM, LLC reported WSBK across 4 quarterly 13F filings, from 2025 Q2 through 2026 Q1.

What was the largest reported WSBK position in MANGROVE PARTNERS IM, LLC's portfolio?

The largest reported portfolio weight for WSBK was 0.19% in 2026 Q1.

What is the latest reported WSBK position on this page?

The most recent filing on this page is 2026 Q1, when MANGROVE PARTNERS IM, LLC reported 186,201 shares, equal to 0.19% of portfolio, with an estimated market value of $2.4M.

What does the chart on this WSBK ownership page compare?

The chart compares MANGROVE PARTNERS IM, LLC's quarterly WSBK portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did MANGROVE PARTNERS IM, LLC time their WSBK position?

Based on 13F filing dates vs. subsequent WSBK price moves, MANGROVE PARTNERS IM, LLC correctly timed 3 out of 3 reported position changes (100%). The annualised alpha on WSBK relative to SPY over the holding period was +24.6%.

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