State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Westlake Corp WLK Stock Holding History

State of Wisconsin Investment Board’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 		$2.95M Sell
25,252
-459
-2% -$44.5K 0.01% 1222
2025
Q4 		$1.9M Buy
+25,711
New +$1.83M ﹤0.01% 1428
2025
Q3 		– Sell
-26,000
Closed -$1.97M – 2541
2025
Q2 		$1.97M Buy
26,000
+353
+1% +$28.9K ﹤0.01% 1303
2025
Q1 		$2.57M Buy
25,647
+3,400
+15% +$377K 0.01% 1156
2024
Q4 		$2.55M Buy
22,247
+469
+2% +$61K 0.01% 1195
2024
Q3 		$3.27M Buy
21,778
+1,393
+7% +$200K 0.01% 1127
2024
Q2 		$2.95M Sell
20,385
-54,557
-73% -$8.38M 0.01% 1138
2024
Q1 		$11.5M Buy
74,942
+650
+0.9% +$91.5K 0.03% 557
2023
Q4 		$10.4M Buy
74,292
+42,118
+131% +$5.35M 0.03% 589
2023
Q3 		$4.01M Sell
32,174
-2,577
-7% -$331K 0.01% 1022
2023
Q2 		$4.15M Sell
34,751
-4,231
-11% -$484K 0.01% 1047
2023
Q1 		$4.52M Buy
38,982
+19,844
+104% +$2.29M 0.01% 1013
2022
Q4 		$1.96M Sell
19,138
-2,444
-11% -$246K 0.01% 1324
2022
Q3 		$1.88M Sell
21,582
-4,750
-18% -$456K 0.01% 1355
2022
Q2 		$2.58M Buy
26,332
+22,117
+525% +$2.71M 0.01% 1294
2022
Q1 		$520K Buy
4,215
+184
+5% +$20.1K ﹤0.01% 1836
2021
Q4 		$392K Sell
4,031
-126
-3% -$12.3K ﹤0.01% 1761
2021
Q3 		$379K Buy
4,157
+201
+5% +$17.2K ﹤0.01% 1766
2021
Q2 		$356K Sell
3,956
-343
-8% -$33.3K ﹤0.01% 1823
2021
Q1 		$382K Sell
4,299
-1,761
-29% -$153K ﹤0.01% 1672
2020
Q4 		$494K Sell
6,060
-180
-3% -$13.4K ﹤0.01% 1544
2020
Q3 		$394K Buy
6,240
+90
+1% +$5.32K ﹤0.01% 1560
2020
Q2 		$330K Sell
6,150
-12,226
-67% -$563K ﹤0.01% 1538
2020
Q1 		$701K Sell
18,376
-6,790
-27% -$382K ﹤0.01% 1265
2019
Q4 		$1.76M Buy
+25,166
New +$1.69M ﹤0.01% 1148
2019
Q3 		– Sell
-9,004
Closed -$625K – 1587
2019
Q2 		$625K Sell
9,004
-6,188
-41% -$412K ﹤0.01% 1261
2019
Q1 		$1.03M Sell
15,192
-6,052
-28% -$439K ﹤0.01% 1150
2018
Q4 		$1.41M Sell
21,244
-19,900
-48% -$1.44M ﹤0.01% 1040
2018
Q3 		$3.42M Sell
41,144
-2,689
-6% -$263K 0.01% 945
2018
Q2 		$4.72M Buy
43,833
+36,692
+514% +$4.11M 0.01% 883
2018
Q1 		$794K Sell
7,141
-198
-3% -$22K ﹤0.01% 1194
2017
Q4 		$782K Buy
7,339
+95
+1% +$8.8K ﹤0.01% 1190
2017
Q3 		$602K Buy
7,244
+145
+2% +$10.7K ﹤0.01% 1246
2017
Q2 		$470K Sell
7,099
-450
-6% -$28.6K ﹤0.01% 1298
2017
Q1 		$499K Sell
7,549
-13,228
-64% -$837K ﹤0.01% 1190
2016
Q4 		$1.16M Sell
20,777
-3,463
-14% -$189K 0.01% 1177
2016
Q3 		$1.3M Sell
24,240
-1,000
-4% -$48.2K 0.01% 1214
2016
Q2 		$1.08M Sell
25,240
-3,400
-12% -$155K ﹤0.01% 1220
2016
Q1 		$1.33M Sell
28,640
-1,300
-4% -$59K 0.01% 1169
2015
Q4 		$1.63M Sell
29,940
-130
-0.4% -$7.53K 0.01% 1148
2015
Q3 		$1.56M Sell
30,070
-820
-3% -$47.9K 0.01% 1180
2015
Q2 		$2.12M Sell
30,890
-310
-1% -$22.6K 0.01% 1172
2015
Q1 		$2.25M Sell
31,200
-820
-3% -$52.5K 0.01% 1132
2014
Q4 		$1.96M Buy
32,020
+1,780
+6% +$121K 0.01% 1171
2014
Q3 		$2.62M Buy
30,240
+220
+0.7% +$19.9K 0.01% 1065
2014
Q2 		$2.51M Buy
30,020
+900
+3% +$67.4K 0.01% 1113
2014
Q1 		$1.93M Sell
29,120
-80
-0.3% -$5.08K 0.01% 1151
2013
Q4 		$1.78M Sell
29,200
-760
-3% -$42.7K 0.01% 1158
2013
Q3 		$1.57M Sell
29,960
-2,320
-7% -$118K 0.01% 1170
2013
Q2 		$1.56M Buy
+32,280
New +$1.45M 0.01% 1165

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 $6.73T AUM 46.02% 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

State of Wisconsin Investment Board's WLK Position: Q1 2026 in Review

State of Wisconsin Investment Board reduced its Westlake Corp (WLK) stake by 1.8% in Q1 2026, selling an estimated $44.5K and leaving 25,252 shares worth $2.95M. The position accounts for 0.01% of the portfolio, ranked #1222.

State of Wisconsin Investment Board first reported a position in WLK in Q2 2013 and has held it in 50 quarters since. The position peaked at $11.5M in Q1 2024. 337 funds tracked by Wall St. Rank hold WLK as of Q1 2026.

  • State of Wisconsin Investment Board held 25,252 shares of Westlake Corp worth $2.95M as of Q1 2026.
  • State of Wisconsin Investment Board sold 459 Westlake Corp shares in Q1 2026, an estimated $44.5K.
  • Westlake Corp made up 0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1222 holding.
  • State of Wisconsin Investment Board first reported a position in Westlake Corp in Q2 2013 and has held it in 50 quarters since.
  • State of Wisconsin Investment Board's Westlake Corp position peaked at $11.5M in Q1 2024.
  • 337 funds tracked by Wall St. Rank held Westlake Corp as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.