WLK
Westlake (WLK)
NYSE
$78.93-$0.005 (-0.006%)
Price as of Aug 21, 2026 7:30 PM EDT
  • $10.1B
    Market Cap
  • -11.14%
    1-Year Change
  • Specialty Chemicals
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
3.06%
3.9M
+477,698 (+12.19%)
Dec 31, 2025
BLACKROCK FUNDING, INC. /DE
2.85%
3.7M
+160,039 (+4.38%)
Dec 31, 2024
BLACKROCK INC.
2.66%
3.4M
-71,816 (-2.11%)
Jun 30, 2024
BLACKROCK, INC.
2.57%
3.3M
+215,075 (+6.53%)
Jun 30, 2026
CAPITAL WORLD INVESTORS
2.22%
2.8M
-1.4M (-48.15%)
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
1.72%
2.2M
-200,781 (-9.10%)
Jun 30, 2026
ORBIS ALLAN GRAY LTD
1.63%
2.1M
-3.2M (-153.96%)
Jun 30, 2026

Current Ownership Distribution

  • Mutual Funds1.7B (69.03%)
  • Institutions714.8M (29.00%)
  • Insiders48.7M (1.97%)
  • Other0 (0.00%)

Insider Transactions

  • 1.97% (48.7M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 1
    Number of InsiderSelling (last 12 months)
  • $240.4M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Lubel Kimberly S
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
Sabat Carolyn Chao
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
MCCOLLUM MARK A
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
Chao David Tsung-Hung
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
CREGG ROGER A
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
Graff Michael J
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
Patel Bhavesh V.
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
NORTHCUTT R BRUCE
Award
Aug 14, 2026
$0.00
2,184
$0.00
2,184
Chao Albert
Executive Chairman
Exempt
Aug 11, 2026
$0.00
38,873
$0.00
38,873
Chao Albert
Executive Chairman
Exempt
Aug 11, 2026
$2.4M
38,873
$61.87
681,753
Chao Albert
Executive Chairman
Sell
Aug 11, 2026
$596,873.30
7,489
$79.70
674,264
Chao Albert
Executive Chairman
Sell
Aug 11, 2026
$2.5M
31,384
$80.42
642,880
Lubel Kimberly S
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
Chao Catherine T.
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
Graff Michael J
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
NORTHCUTT R BRUCE
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
Lubel Kimberly S
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
13,821
Sheets Jeffrey Wayne
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
Sabat Carolyn Chao
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
NORTHCUTT R BRUCE
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
23,351
Graff Michael J
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
23,310
Chao David Tsung-Hung
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
Sabat Carolyn Chao
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
5,748
Sheets Jeffrey Wayne
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
14,927
MCCOLLUM MARK A
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
2,168
Chao Catherine T.
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
7,748
MCCOLLUM MARK A
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
11,824
Chao David Tsung-Hung
Exempt
Aug 08, 2026
$0.00
2,168
$0.00
11,080
Baksht Jonathan
SVP and CFO
Award
Jun 15, 2026
$0.00
20,580
$0.00
20,580
Chao John Tsung-chen
Award
Feb 20, 2026
$0.00
4,044
$0.00
4,044