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 		$607K Buy
5,200
+1,600
+44% +$155K ﹤0.01% 3047
2025
Q4 		$266K Buy
3,600
+2,100
+140% +$149K ﹤0.01% 3940
2025
Q3 		$115K Sell
1,500
-900
-38% -$75K ﹤0.01% 5585
2025
Q2 		$182K Buy
2,400
+1,900
+380% +$155K ﹤0.01% 4613
2025
Q1 		$50K Sell
500
-10,800
-96% -$1.2M ﹤0.01% 5778
2024
Q4 		$1.29M Buy
11,300
+9,400
+495% +$1.22M ﹤0.01% 2595
2024
Q3 		$285K Sell
1,900
-4,900
-72% -$705K ﹤0.01% 4183
2024
Q2 		$984K Sell
6,800
-3,700
-35% -$568K ﹤0.01% 2927
2024
Q1 		$1.6M Buy
10,500
+5,600
+114% +$788K ﹤0.01% 2627
2023
Q4 		$685K Sell
4,900
-1,400
-22% -$178K ﹤0.01% 3386
2023
Q3 		$785K Buy
6,300
+900
+17% +$116K ﹤0.01% 2919
2023
Q2 		$645K Buy
5,400
+2,700
+100% +$309K ﹤0.01% 3039
2023
Q1 		$313K Sell
2,700
-23,500
-90% -$2.71M ﹤0.01% 3798
2022
Q4 		$2.69M Sell
26,200
-8,500
-24% -$856K ﹤0.01% 1647
2022
Q3 		$3.01M Buy
34,700
+300
+0.9% +$28.8K ﹤0.01% 1608
2022
Q2 		$3.37M Buy
34,400
+2,800
+9% +$343K ﹤0.01% 1400
2022
Q1 		$3.9M Buy
31,600
+9,300
+42% +$1.01M ﹤0.01% 1463
2021
Q4 		$2.17M Sell
22,300
-39,600
-64% -$3.86M ﹤0.01% 1955
2021
Q3 		$5.65M Buy
61,900
+300
+0.5% +$25.7K 0.01% 1099
2021
Q2 		$5.55M Buy
61,600
+61,571
+212,314% +$5.98M 0.01% 1092
2021
Q1 		$257K Buy
29
+12
+71% +$1.04K ﹤0.01% 4349
2020
Q4 		$138K Sell
17
-105
-86% -$7.84K ﹤0.01% 5086
2020
Q3 		$771K Sell
122
-449
-79% -$26.5K ﹤0.01% 2532
2020
Q2 		$3.06M Sell
571
-177
-24% -$8.15K ﹤0.01% 1177
2020
Q1 		$2.85M Buy
748
+278
+59% +$15.6K 0.01% 1017
2019
Q4 		$3.3M Sell
470
-47
-9% -$3.16K 0.01% 1081
2019
Q3 		$3.39M Buy
517
+29
+6% +$1.87K 0.01% 949
2019
Q2 		$3.39M Buy
488
+98
+25% +$6.52K 0.01% 935
2019
Q1 		$2.65M Buy
390
+66
+20% +$4.78K 0.01% 1125
2018
Q4 		$2.14M Buy
324
+306
+1,700% +$22.1K 0.01% 1042
2018
Q3 		$149K Sell
18
-159
-90% -$15.6K ﹤0.01% 3984
2018
Q2 		$1.91M Buy
177
+14
+9% +$1.57K 0.01% 1191
2018
Q1 		$27K Buy
163
+108
+196% +$12K ﹤0.01% 3067
2017
Q4 		$54K Sell
55
-342
-86% -$31.7K ﹤0.01% 2379
2017
Q3 		$11K Sell
397
-5
-1% -$367 ﹤0.01% 3714
2017
Q2 		$136K Buy
402
+389
+2,992% +$24.7K 0.01% 1505
2017
Q1 		$2K Sell
13
-56
-81% -$3.54K ﹤0.01% 5362
2016
Q4 		$6K Sell
69
-93
-57% -$5.08K ﹤0.01% 4236
2016
Q3 		$4K Buy
162
+118
+268% +$5.69K ﹤0.01% 4526
2016
Q2 		$8K Sell
44
-169
-79% -$7.72K ﹤0.01% 3843
2016
Q1 		$20K Buy
213
+183
+610% +$8.3K ﹤0.01% 2816
2015
Q4 		$18K Sell
30
-164
-85% -$9.5K ﹤0.01% 2797
2015
Q3 		$34K Buy
194
+120
+162% +$7.01K ﹤0.01% 2301
2015
Q2 		$1K Sell
74
-52
-41% -$3.78K ﹤0.01% 4824
2015
Q1 		$2K Buy
126
+91
+260% +$5.83K ﹤0.01% 4217
2014
Q4 		$46K Buy
+35
New +$2.38K 0.01% 1443

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.