Optiver Holding’s Westlake Corp WLK Stock Holding History

Optiver Holding’s Portfolio WLK Stock Details WLK Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-83	Closed	-$6.4K	–	3057
2025 Q3	$6.4K	Sell	83 -13	-14%	-$1.08K	﹤0.01%	1564
2025 Q2	$7.29K	Buy	+96	New	+$7.86K	﹤0.01%	1098

Other funds holding WLK

OAG

Orbis Allan Gray Hamilton, Bermuda $23.7B AUM 65.43% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

BIP

Brandes Investment Partners La Jolla, California $14.1B AUM 25.52% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return

Optiver Holding's WLK Position: Q4 2025 in Review

Optiver Holding sold out of Westlake Corp (WLK) in Q4 2025, closing a stake of 83 shares — an estimated $6.4K sold.

Optiver Holding first reported a position in WLK in Q2 2025 and held it in 2 quarters. The position peaked at $7.29K in Q2 2025. 296 funds tracked by Wall St. Rank hold WLK as of Q4 2025.

Optiver Holding reported no remaining Westlake Corp position as of Q4 2025 after selling out during the quarter.
Optiver Holding sold 83 Westlake Corp shares in Q4 2025, an estimated $6.4K.
Optiver Holding first reported a position in Westlake Corp in Q2 2025 and held it in 2 quarters.
Optiver Holding's Westlake Corp position peaked at $7.29K in Q2 2025.
296 funds tracked by Wall St. Rank held Westlake Corp as of Q4 2025.

Based on Optiver Holding's 13F filing for Q4 2025, filed 17 Feb 2026.