Renaissance Technologies
WSBK icon

Renaissance Technologies’s Winchester Bancorp WSBK Stock Holding History

Renaissance Technologies’s Portfolio WSBK Stock Details WSBK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		$444K Buy
34,400
+3,000
+10% +$39K ﹤0.01% 2661
2026
Q2 		$413K Buy
31,400
+400
+1% +$5.14K ﹤0.01% 2669
2026
Q1 		$394K Buy
31,000
+4,498
+17% +$54.7K ﹤0.01% 2700
2025
Q4 		$277K Buy
+26,502
New +$258K ﹤0.01% 2788

Other funds holding WSBK

Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
Northstar Financial Companies
Northstar Financial Companies Conshohocken, Pennsylvania $152M AUM 25.88% 1-Year Est. Return
Oppenheimer & Close
Oppenheimer & Close New York $163M AUM 22.88% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
RFG - Bristol Wealth Advisors
RFG - Bristol Wealth Advisors Taunton, Massachusetts $420M AUM 17.18% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $463B AUM
ECM
EagleClaw Capital Management Boston, Massachusetts $753M AUM 20.19% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $468B AUM 17.69% 1-Year Est. Return
Eastern Bank
Eastern Bank Boston, Massachusetts $6.58B AUM 23.57% 1-Year Est. Return
Vanguard Global Advisers
Vanguard Global Advisers Malvern, Pennsylvania $225B AUM

Renaissance Technologies's WSBK Position: Q3 2026 in Review

Renaissance Technologies increased its Winchester Bancorp (WSBK) stake by 9.6% in Q3 2026, buying an estimated $39K and bringing the position to 34,400 shares worth $444K. The position accounts for ﹤0.01% of the portfolio, ranked #2661.

Renaissance Technologies first reported a position in WSBK in Q4 2025 and has held it in 4 quarters since. 14 funds tracked by Wall St. Rank hold WSBK as of Q3 2026.

  • Renaissance Technologies held 34,400 shares of Winchester Bancorp worth $444K as of Q3 2026.
  • Renaissance Technologies bought 3,000 Winchester Bancorp shares in Q3 2026, an estimated $39K.
  • Winchester Bancorp made up ﹤0.01% of Renaissance Technologies's portfolio in Q3 2026, its #2661 holding.
  • Renaissance Technologies first reported a position in Winchester Bancorp in Q4 2025 and has held it in 4 quarters since.
  • 14 funds tracked by Wall St. Rank held Winchester Bancorp as of Q3 2026.

Based on Renaissance Technologies's 13F filing for Q3 2026, filed 12 Nov 2026.