Simplex Trading
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Simplex Trading’s Westlake Corp WLK Stock Holding History

Simplex Trading’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 		$713K Buy
6,100
+3,000
+97% +$291K ﹤0.01% 2859
2025
Q4 		$229K Sell
3,100
-18,400
-86% -$1.31M ﹤0.01% 4086
2025
Q3 		$1.66M Sell
21,500
-700
-3% -$58.3K ﹤0.01% 2508
2025
Q2 		$1.69M Buy
22,200
+20,700
+1,380% +$1.69M ﹤0.01% 2263
2025
Q1 		$150K Sell
1,500
-51,600
-97% -$5.71M ﹤0.01% 4629
2024
Q4 		$6.09M Buy
53,100
+2,500
+5% +$325K ﹤0.01% 1336
2024
Q3 		$7.6M Buy
50,600
+46,600
+1,165% +$6.7M ﹤0.01% 1204
2024
Q2 		$579K Sell
4,000
-1,500
-27% -$230K ﹤0.01% 3509
2024
Q1 		$840K Sell
5,500
-9,300
-63% -$1.31M ﹤0.01% 3301
2023
Q4 		$2.07M Buy
14,800
+10,200
+222% +$1.29M ﹤0.01% 2329
2023
Q3 		$573K Sell
4,600
-1,600
-26% -$205K ﹤0.01% 3250
2023
Q2 		$740K Buy
6,200
+3,500
+130% +$400K ﹤0.01% 2896
2023
Q1 		$313K Sell
2,700
-700
-21% -$80.8K ﹤0.01% 3797
2022
Q4 		$348K Buy
3,400
+900
+36% +$90.7K ﹤0.01% 3568
2022
Q3 		$217K Sell
2,500
-200
-7% -$19.2K ﹤0.01% 4508
2022
Q2 		$264K Sell
2,700
-700
-21% -$85.7K ﹤0.01% 4262
2022
Q1 		$419K Buy
3,400
+1,800
+113% +$196K ﹤0.01% 4071
2021
Q4 		$155K Sell
1,600
-2,000
-56% -$195K ﹤0.01% 5555
2021
Q3 		$328K Hold
3,600
– – ﹤0.01% 4763
2021
Q2 		$324K Buy
3,600
+3,572
+12,757% +$347K ﹤0.01% 4851
2021
Q1 		$248K Buy
28
+3
+12% +$260 ﹤0.01% 4418
2020
Q4 		$204K Sell
25
-51
-67% -$3.81K ﹤0.01% 4573
2020
Q3 		$480K Sell
76
-229
-75% -$13.5K ﹤0.01% 3050
2020
Q2 		$1.64M Sell
305
-438
-59% -$20.2K ﹤0.01% 1681
2020
Q1 		$2.84M Sell
743
-84
-10% -$4.72K 0.01% 1021
2019
Q4 		$5.8M Buy
827
+204
+33% +$13.7K 0.01% 703
2019
Q3 		$4.08M Buy
623
+252
+68% +$16.2K 0.01% 837
2019
Q2 		$2.58M Buy
371
+4
+1% +$266 0.01% 1110
2019
Q1 		$2.49M Buy
367
+304
+483% +$22K 0.01% 1179
2018
Q4 		$416K Sell
63
-8
-11% -$578 ﹤0.01% 2402
2018
Q3 		$590K Sell
71
-7
-9% -$685 ﹤0.01% 2459
2018
Q2 		$839K Sell
78
-2,993
-97% -$336K ﹤0.01% 1944
2018
Q1 		$340K Buy
3,071
+3,064
+43,771% +$341K 0.01% 918
2017
Q4 		$3K Sell
7
-128
-95% -$11.9K ﹤0.01% 5008
2017
Q3 		$32K Buy
135
+87
+181% +$6.39K ﹤0.01% 2732
2017
Q2 		$20K Sell
48
-59
-55% -$3.75K ﹤0.01% 3305
2017
Q1 		$42K Sell
107
-127
-54% -$8.04K ﹤0.01% 2539
2016
Q4 		$108K Buy
234
+63
+37% +$3.44K 0.01% 1473
2016
Q3 		$92K Buy
+171
New +$8.25K 0.01% 1585
2016
Q2 		– Sell
-79
Closed -$15K – 6537
2016
Q1 		$15K Buy
+79
New +$3.58K ﹤0.01% 3083
2015
Q2 		– Sell
-48
Closed -$5K – 5944
2015
Q1 		$5K Buy
48
+30
+167% +$1.92K ﹤0.01% 3552
2014
Q4 		$3K Buy
+18
New +$1.23K ﹤0.01% 3549

Other funds holding WLK

OAG
Orbis Allan Gray Hamilton, Bermuda $23.7B AUM 65.43% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
T. Rowe Price Associates
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
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
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Simplex Trading's WLK Position: Q1 2026 in Review

Simplex Trading sold out of Westlake Corp (WLK) in Q1 2026, closing a stake of 1,981 shares — an estimated $192K sold.

Simplex Trading first reported a position in WLK in Q4 2014 and held it in 23 quarters. The position peaked at $831K in Q4 2018. 336 funds tracked by Wall St. Rank hold WLK as of Q1 2026.

  • Simplex Trading reported no remaining Westlake Corp position as of Q1 2026 after selling out during the quarter.
  • Simplex Trading sold 1,981 Westlake Corp shares in Q1 2026, an estimated $192K.
  • Simplex Trading first reported a position in Westlake Corp in Q4 2014 and held it in 23 quarters.
  • Simplex Trading's Westlake Corp position peaked at $831K in Q4 2018.
  • 336 funds tracked by Wall St. Rank held Westlake Corp as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.