WSBK · Insider trading · 13F holders · Congress trades
Winchester Bancorp Inc (WSBK)
Who is buying and selling WSBK: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 2
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
WSBK at a glance
- No open-market insider purchases or sales of WSBK were filed in the last 90 days.
- 2 13F filers hold WSBK among their 50 largest positions, worth $1.6M combined. The biggest bets by portfolio weight are Northstar Financial Companies, Inc. (0.6%) and Oppenheimer & Close, LLC (0.4%).
- No member of Congress has disclosed a trade in WSBK.
WSBK insider trading
No open-market insider purchases or sales of WSBK were filed in the last 90 days.
Who owns WSBK? Hedge funds and superinvestors
2 13F filers hold WSBK among their 50 largest positions, worth $1.6M combined. The biggest bets by portfolio weight are Northstar Financial Companies, Inc. (0.6%) and Oppenheimer & Close, LLC (0.4%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Northstar Financial Companies, Inc.Wealth manager | 0.6% | $920K | 70,000 | +0.0% shares | Q2 2026 |
| Oppenheimer & Close, LLCWealth manager | 0.4% | $657K | 50,000 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 2). Screen WSBK in the grand portfolio →
WSBK stock trades by members of Congress
No member of Congress has disclosed a trade in WSBK.
WSBK questions and answers
Are insiders buying WSBK stock?
No open-market insider purchases or sales of WSBK were filed in the last 90 days.
Which hedge funds own WSBK?
2 13F filers hold WSBK among their 50 largest positions, worth $1.6M combined. The biggest bets by portfolio weight are Northstar Financial Companies, Inc. (0.6%) and Oppenheimer & Close, LLC (0.4%).
Has Congress traded WSBK?
No member of Congress has disclosed a trade in WSBK.
Who is the largest holder of WSBK?
Among 13F filers, Northstar Financial Companies, Inc. reports the largest WSBK position, $920K (70,000 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Northstar Financial Companies, Inc.'s: 0.6% of its portfolio.
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