WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q4 2025
Shares 7,900 Value ($000) $584 Avg Close $70.79 Range $55.84 - $82.75
Q3 2025
Shares 7,900 Value ($000) $609 Avg Close $82.33 Range $73.94 - $91.41
Q2 2025
Shares 8,000 Value ($000) $607 Avg Close $80.28 Range $67.52 - $99.92
Q1 2025
Shares 9,000 Value ($000) $900 Avg Close $108.01 Range $95.27 - $116.71
Q4 2024
Shares 8,900 Value ($000) $1,020 Avg Close $126.38 Range $109.67 - $146.31
Q3 2024
Shares 8,700 Value ($000) $1,308 Avg Close $139.25 Range $125.61 - $148.72
Q2 2024
Shares 8,500 Value ($000) $1,231 Avg Close $148.16 Range $138.77 - $156.68
Q1 2024
Shares 8,800 Value ($000) $1,345 Avg Close $135.33 Range $113.88 - $147.53
Q4 2023
Shares 8,600 Value ($000) $1,204 Avg Close $121.60 Range $107.83 - $137.84
Q3 2023
Shares 8,600 Value ($000) $1,072 Avg Close $122.44 Range $108.80 - $131.81
Q2 2023
Shares 9,600 Value ($000) $1,147 Avg Close $108.79 Range $98.37 - $116.78
Q1 2023
Shares 9,800 Value ($000) $1,137 Avg Close $109.37 Range $92.83 - $119.59
Q4 2022
Shares 9,900 Value ($000) $1,015 Avg Close $95.20 Range $80.55 - $107.11