Ken Griffin
WSBK

Ken Griffin’s Winchester Bancorp WSBK Stock Holding History

Ken Griffin’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
Q1 		– Sell
-20,999
Closed -$219K – 14702
2025
Q4 		$219K Sell
20,999
-5,439
-21% -$53K ﹤0.01% 10837
2025
Q3 		$254K Sell
26,438
-15,491
-37% -$146K ﹤0.01% 10728
2025
Q2 		$375K Buy
+41,929
New +$386K ﹤0.01% 9296

Other funds holding WSBK

MP
Mangrove Partners Greenwich, Connecticut $1.24B AUM 41.74% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
NFC
Northstar Financial Companies Conshohocken, Pennsylvania $148M AUM 33.49% 1-Year Est. Return
IWC
Integrated Wealth Concepts Waltham, Massachusetts $12.5B AUM 18.49% 1-Year Est. Return
OC
Oppenheimer & Close New York $159M AUM 60.56% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
MI
M3F Inc Salt Lake City, Utah $404M AUM 17.6% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
Raymond James Financial
Raymond James Financial St Petersburg, Florida $324B AUM 22.36% 1-Year Est. Return

Ken Griffin's WSBK Position: Q1 2026 in Review

Ken Griffin sold out of Winchester Bancorp (WSBK) in Q1 2026, closing a stake of 20,999 shares — an estimated $219K sold.

Ken Griffin first reported a position in WSBK in Q2 2025 and held it in 3 quarters. The position peaked at $375K in Q2 2025. 19 funds tracked by Wall St. Rank hold WSBK as of Q1 2026.

  • Ken Griffin reported no remaining Winchester Bancorp position as of Q1 2026 after selling out during the quarter.
  • Ken Griffin sold 20,999 Winchester Bancorp shares in Q1 2026, an estimated $219K.
  • Ken Griffin first reported a position in Winchester Bancorp in Q2 2025 and held it in 3 quarters.
  • Ken Griffin's Winchester Bancorp position peaked at $375K in Q2 2025.
  • 19 funds tracked by Wall St. Rank held Winchester Bancorp as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.