WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q4 2025
Shares 21 Value ($000) $2 Avg Close $70.79 Range $55.84 - $82.75
Q2 2022
Shares 175 Value ($000) $17 Avg Close $115.03 Range $86.41 - $132.48
Q1 2022
Shares 175 Value ($000) $22 Avg Close $102.15 Range $87.54 - $119.36
Q3 2021
Shares 4 Value ($000) $0 Avg Close $79.74 Range $72.56 - $88.16
Q2 2021
Shares 77 Value ($000) $7 Avg Close $90.14 Range $80.84 - $98.96
Q1 2021
Shares 77 Value ($000) $7 Avg Close $80.32 Range $68.77 - $90.16
Q3 2020
Shares 2 Value ($000) $0 Avg Close $54.23 Range $46.16 - $63.35
Q2 2020
Shares 2 Value ($000) $0 Avg Close $42.05 Range $30.99 - $55.36
Q4 2019
Shares 8 Value ($000) $1 Avg Close $60.78 Range $52.18 - $68.35
Q3 2019
Shares 20 Value ($000) $1 Avg Close $57.99 Range $50.43 - $64.27
Q2 2019
Shares 12 Value ($000) $1 Avg Close $59.69 Range $51.40 - $69.93
Q4 2018
Shares 71 Value ($000) $5 Avg Close $64.35 Range $53.36 - $76.44
Q3 2018
Shares 71 Value ($000) $6 Avg Close $86.83 Range $72.82 - $100.10
Q4 2017
Shares 70 Value ($000) $7 Avg Close $81.78 Range $72.56 - $95.02
Q1 2014
Shares 280 Value ($000) $19 Avg Close $53.68 Range $48.11 - $58.70