California State Teachers Retirement System (CalSTRS)
WLK icon

California State Teachers Retirement System (CalSTRS)’s Westlake Corp WLK Stock Holding History

California State Teachers Retirement System (CalSTRS)’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 		$5.19M Buy
44,459
+8,361
+23% +$811K 0.01% 994
2025
Q4 		$2.67M Buy
36,098
+34,009
+1,628% +$2.42M ﹤0.01% 1259
2025
Q3 		$161K Buy
2,089
+2
+0.1% +$167 ﹤0.01% 2257
2025
Q2 		$158K Sell
2,087
-43,108
-95% -$3.53M ﹤0.01% 2270
2025
Q1 		$4.52M Buy
45,195
+84
+0.2% +$9.3K 0.01% 921
2024
Q4 		$5.17M Sell
45,111
-2,443
-5% -$318K 0.01% 894
2024
Q3 		$7.15M Sell
47,554
-2,733
-5% -$393K 0.01% 745
2024
Q2 		$7.28M Sell
50,287
-606
-1% -$93.1K 0.01% 724
2024
Q1 		$7.78M Sell
50,893
-1,190
-2% -$168K 0.01% 722
2023
Q4 		$7.29M Sell
52,083
-1,413
-3% -$179K 0.01% 748
2023
Q3 		$6.67M Sell
53,496
-3,452
-6% -$443K 0.01% 761
2023
Q2 		$6.8M Sell
56,948
-1,355
-2% -$155K 0.01% 798
2023
Q1 		$6.76M Sell
58,303
-645
-1% -$74.4K 0.01% 797
2022
Q4 		$6.04M Sell
58,948
-4,018
-6% -$405K 0.01% 845
2022
Q3 		$5.47M Sell
62,966
-308
-0.5% -$29.5K 0.01% 870
2022
Q2 		$6.2M Buy
63,274
+16,291
+35% +$2M 0.01% 834
2022
Q1 		$5.8M Sell
46,983
-3,745
-7% -$408K 0.01% 974
2021
Q4 		$4.93M Sell
50,728
-9,536
-16% -$930K 0.01% 1171
2021
Q3 		$5.49M Buy
60,264
+3,606
+6% +$309K 0.01% 1090
2021
Q2 		$5.1M Sell
56,658
-2,289
-4% -$222K 0.01% 1162
2021
Q1 		$5.23M Sell
58,947
-103
-0.2% -$8.94K 0.01% 1143
2020
Q4 		$4.82M Buy
59,050
+872
+1% +$65.2K 0.01% 1139
2020
Q3 		$3.68M Buy
58,178
+1,160
+2% +$68.5K 0.01% 1128
2020
Q2 		$3.06M Sell
57,018
-1,787
-3% -$82.3K 0.01% 1212
2020
Q1 		$2.25M Buy
58,805
+4,152
+8% +$233K ﹤0.01% 1230
2019
Q4 		$3.83M Sell
54,653
-1,784
-3% -$120K 0.01% 1174
2019
Q3 		$3.7M Buy
56,437
+310
+0.6% +$20K 0.01% 1160
2019
Q2 		$3.9M Sell
56,127
-2,797
-5% -$186K 0.01% 1147
2019
Q1 		$4M Buy
58,924
+225
+0.4% +$16.3K 0.01% 1097
2018
Q4 		$3.88M Buy
58,699
+2,411
+4% +$174K 0.01% 1059
2018
Q3 		$4.68M Hold
56,288
– – 0.01% 1069
2018
Q2 		$6.06M Buy
56,288
+25
+0% +$2.8K 0.01% 899
2018
Q1 		$6.25M Sell
56,263
-1,896
-3% -$211K 0.01% 844
2017
Q4 		$6.2M Sell
58,159
-286
-0.5% -$26.5K 0.01% 870
2017
Q3 		$4.86M Sell
58,445
-6,040
-9% -$444K 0.01% 998
2017
Q2 		$4.27M Sell
64,485
-13,067
-17% -$830K 0.01% 1125
2017
Q1 		$5.12M Sell
77,552
-3,500
-4% -$221K 0.01% 1043
2016
Q4 		$4.54M Sell
81,052
-2,100
-3% -$115K 0.01% 1152
2016
Q3 		$4.45M Buy
83,152
+800
+1% +$38.6K 0.01% 1133
2016
Q2 		$3.54M Sell
82,352
-5,493
-6% -$251K 0.01% 1233
2016
Q1 		$4.07M Buy
87,845
+10,891
+14% +$494K 0.01% 1143
2015
Q4 		$4.18M Buy
76,954
+1,227
+2% +$71.1K 0.01% 1061
2015
Q3 		$3.93M Buy
75,727
+2,245
+3% +$131K 0.01% 1093
2015
Q2 		$5.04M Sell
73,482
-2,176
-3% -$158K 0.01% 1027
2015
Q1 		$5.44M Sell
75,658
-1,097
-1% -$70.3K 0.01% 978
2014
Q4 		$4.69M Buy
76,755
+526
+0.7% +$35.8K 0.01% 1052
2014
Q3 		$6.6M Sell
76,229
-119
-0.2% -$10.8K 0.02% 821
2014
Q2 		$6.39M Buy
76,348
+2,200
+3% +$165K 0.02% 867
2014
Q1 		$4.91M Buy
74,148
+300
+0.4% +$19.1K 0.01% 966
2013
Q4 		$4.51M Buy
73,848
+600
+0.8% +$33.7K 0.01% 1000
2013
Q3 		$3.83M Buy
73,248
+2,248
+3% +$115K 0.01% 1044
2013
Q2 		$3.42M Buy
+71,000
New +$3.19M 0.01% 1047

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

California State Teachers Retirement System (CalSTRS)'s WLK Position: Q1 2026 in Review

California State Teachers Retirement System (CalSTRS) increased its Westlake Corp (WLK) stake by 23% in Q1 2026, buying an estimated $811K and bringing the position to 44,459 shares worth $5.19M. The position accounts for 0.01% of the portfolio, ranked #994.

California State Teachers Retirement System (CalSTRS) first reported a position in WLK in Q2 2013 and has held it in 52 quarters since. The position peaked at $7.78M in Q1 2024. 336 funds tracked by Wall St. Rank hold WLK as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 44,459 shares of Westlake Corp worth $5.19M as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 8,361 Westlake Corp shares in Q1 2026, an estimated $811K.
  • Westlake Corp made up 0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #994 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Westlake Corp in Q2 2013 and has held it in 52 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Westlake Corp position peaked at $7.78M in Q1 2024.
  • 336 funds tracked by Wall St. Rank held Westlake Corp as of Q1 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q1 2026, filed 18 May 2026.