WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025
Shares 36,098 Value ($000) $2,669 Avg Close $70.79 Range $55.84 - $82.75
Q3 2025
Shares 2,089 Value ($000) $161 Avg Close $82.33 Range $73.94 - $91.41
Q2 2025
Shares 2,087 Value ($000) $158 Avg Close $80.28 Range $67.52 - $99.92
Q1 2025
Shares 45,195 Value ($000) $4,521 Avg Close $108.01 Range $95.27 - $116.71
Q4 2024
Shares 45,111 Value ($000) $5,172 Avg Close $126.38 Range $109.67 - $146.31
Q3 2024
Shares 47,554 Value ($000) $7,147 Avg Close $139.25 Range $125.61 - $148.72
Q2 2024
Shares 50,287 Value ($000) $7,283 Avg Close $148.16 Range $138.77 - $156.68
Q1 2024
Shares 50,893 Value ($000) $7,776 Avg Close $135.33 Range $113.88 - $147.53
Q4 2023
Shares 52,083 Value ($000) $7,290 Avg Close $121.60 Range $107.83 - $137.84
Q3 2023
Shares 53,496 Value ($000) $6,669 Avg Close $122.44 Range $108.80 - $131.81
Q2 2023
Shares 56,948 Value ($000) $6,804 Avg Close $108.79 Range $98.37 - $116.78
Q1 2023
Shares 58,303 Value ($000) $6,762 Avg Close $109.37 Range $92.83 - $119.59
Q4 2022
Shares 58,948 Value ($000) $6,045 Avg Close $95.20 Range $80.55 - $107.11
Q3 2022
Shares 62,966 Value ($000) $5,470 Avg Close $90.33 Range $76.70 - $104.08
Q2 2022
Shares 63,274 Value ($000) $6,202 Avg Close $115.03 Range $86.41 - $132.48
Q1 2022
Shares 46,983 Value ($000) $5,798 Avg Close $102.15 Range $87.54 - $119.36
Q4 2021
Shares 50,728 Value ($000) $4,927 Avg Close $91.08 Range $82.73 - $97.95
Q3 2021
Shares 60,264 Value ($000) $5,492 Avg Close $79.74 Range $72.56 - $88.16
Q2 2021
Shares 56,658 Value ($000) $5,104 Avg Close $90.14 Range $80.84 - $98.96
Q1 2021
Shares 58,947 Value ($000) $5,234 Avg Close $80.32 Range $68.77 - $90.16
Q4 2020
Shares 59,050 Value ($000) $4,818 Avg Close $68.91 Range $56.02 - $78.45
Q3 2020
Shares 58,178 Value ($000) $3,678 Avg Close $54.23 Range $46.16 - $63.35
Q2 2020
Shares 57,018 Value ($000) $3,059 Avg Close $42.05 Range $30.99 - $55.36
Q1 2020
Shares 58,805 Value ($000) $2,245 Avg Close $51.06 Range $26.40 - $65.18
Q4 2019
Shares 54,653 Value ($000) $3,834 Avg Close $60.78 Range $52.18 - $68.35
Q3 2019
Shares 56,437 Value ($000) $3,698 Avg Close $57.99 Range $50.43 - $64.27
Q2 2019
Shares 56,127 Value ($000) $3,899 Avg Close $59.69 Range $51.40 - $69.93
Q1 2019
Shares 58,924 Value ($000) $3,999 Avg Close $64.77 Range $57.75 - $72.34
Q4 2018
Shares 58,699 Value ($000) $3,884 Avg Close $64.35 Range $53.36 - $76.44
Q3 2018
Shares 56,288 Value ($000) $4,678 Avg Close $86.83 Range $72.82 - $100.10
Q2 2018
Shares 56,288 Value ($000) $6,058 Avg Close $99.34 Range $90.39 - $110.06
Q1 2018
Shares 56,263 Value ($000) $6,254 Avg Close $98.39 Range $86.89 - $107.41
Q4 2017
Shares 58,159 Value ($000) $6,196 Avg Close $81.78 Range $72.56 - $95.02
Q3 2017
Shares 58,445 Value ($000) $4,856 Avg Close $64.66 Range $57.52 - $74.59
Q2 2017
Shares 64,485 Value ($000) $4,269 Avg Close $55.73 Range $52.23 - $59.49
Q1 2017
Shares 77,552 Value ($000) $5,122 Avg Close $55.38 Range $49.25 - $59.68
Q4 2016
Shares 81,052 Value ($000) $4,538 Avg Close $47.64 Range $42.61 - $53.78
Q3 2016
Shares 83,152 Value ($000) $4,449 Avg Close $41.92 Range $34.93 - $47.03
Q2 2016
Shares 82,352 Value ($000) $3,535 Avg Close $39.55 Range $34.26 - $45.64
Q1 2016
Shares 87,845 Value ($000) $4,067 Avg Close $39.11 Range $34.33 - $46.52
Q4 2015
Shares 76,954 Value ($000) $4,180 Avg Close $49.75 Range $44.01 - $54.52
Q3 2015
Shares 75,727 Value ($000) $3,929 Avg Close $49.96 Range $42.26 - $59.13
Q2 2015
Shares 73,482 Value ($000) $5,040 Avg Close $62.10 Range $58.06 - $67.58
Q1 2015
Shares 75,658 Value ($000) $5,443 Avg Close $54.56 Range $46.07 - $62.01
Q4 2014
Shares 76,755 Value ($000) $4,689 Avg Close $57.80 Range $45.45 - $73.16
Q3 2014
Shares 76,229 Value ($000) $6,601 Avg Close $76.69 Range $70.51 - $83.52
Q2 2014
Shares 76,348 Value ($000) $6,395 Avg Close $63.36 Range $52.18 - $72.01
Q1 2014
Shares 74,148 Value ($000) $4,907 Avg Close $53.68 Range $48.11 - $58.70
Q4 2013
Shares 36,924 Value ($000) $4,507 Avg Close $47.34 Range $43.59 - $51.55
Q3 2013
Shares 36,624 Value ($000) $3,833 Avg Close $42.90 Range $40.28 - $45.40
Q2 2013
Shares 35,500 Value ($000) $3,423 Avg Close $37.72 Range $32.17 - $41.82
Q1 2013
Shares 34,784 Value ($000) $3,252 Avg Close $37.55 Range $34.07 - $41.22