Twin Tree Management’s Westlake Corp WLK Stock Holding History

Twin Tree Management’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
2026 Q1	$1.96M	Sell	16,800 -22,200	-57%	-$2.15M	0.04%	490
2025 Q4	$2.88M	Buy	39,000 +10,400	+36%	+$740K	0.03%	700
2025 Q3	$2.2M	Buy	28,600 +18,900	+195%	+$1.57M	0.01%	1015
2025 Q2	$737K	Buy	+9,700	New	+$794K	﹤0.01%	1403
2020 Q4	–	Sell	-5,500	Closed	-$348K	–	1524
2020 Q3	$348K	Buy	+5,500	New	+$325K	﹤0.01%	999
2020 Q1	–	Sell	-46,300	Closed	-$3.25M	–	1652
2019 Q4	$3.25M	Sell	46,300 -82,200	-64%	-$5.52M	0.01%	605
2019 Q3	$8.42M	Sell	128,500 -47,500	-27%	-$3.06M	0.03%	363
2019 Q2	$12.2M	Buy	176,000 +162,900	+1,244%	+$10.8M	0.06%	259
2019 Q1	$889K	Buy	+13,100	New	+$949K	﹤0.01%	854
2015 Q1	–	Sell	-5,300	Closed	-$324K	–	1331
2014 Q4	$324K	Sell	5,300 -5,300	-50%	-$361K	0.01%	842
2014 Q3	$918K	Sell	10,600 -38,200	-78%	-$3.46M	0.02%	583
2014 Q2	$4.09M	Buy	+48,800	New	+$3.65M	0.09%	234

Other funds holding WLK

OAG

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

Capital World Investors Los Angeles, California $733B AUM 35.63% 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

BIP

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

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Twin Tree Management's WLK Position: Q1 2026 in Review

Twin Tree Management opened a new position in Westlake Corp (WLK) in Q1 2026: 35,977 shares worth $4.2M. The stake represents 0.09% of the portfolio and ranks #256 among its holdings. This is a return to the name: Twin Tree Management previously reported a position in WLK as recently as Q3 2025.

Twin Tree Management first reported a position in WLK in Q1 2015 and has held it in 14 quarters since. 336 funds tracked by Wall St. Rank hold WLK as of Q1 2026.

Twin Tree Management held 35,977 shares of Westlake Corp worth $4.2M as of Q1 2026.
Westlake Corp was a new Twin Tree Management position in Q1 2026.
Westlake Corp made up 0.09% of Twin Tree Management's portfolio in Q1 2026, its #256 holding.
Twin Tree Management first reported a position in Westlake Corp in Q1 2015 and has held it in 14 quarters since.
336 funds tracked by Wall St. Rank held Westlake Corp as of Q1 2026.

Based on Twin Tree Management's 13F filing for Q1 2026, filed 14 May 2026.