2m 2m 2m 2m 2m 2m 2m
Westlake (WLK)
NYSE
$64.65+$0.09 (+0.15%)
Price as of Oct 23, 2026 8:00 PM EDT- $8.2BMarket Cap
- -16.30%1-Year Change
- Specialty ChemicalsIndustry
Westlake (WLK)
$64.65+$0.09 (+0.15%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD GROUP INC | 3.07% | 3.9M | +477,698 (+12.19%) | Dec 31, 2025 |
BLACKROCK FUNDING, INC. /DE | 2.86% | 3.7M | +160,039 (+4.38%) | Dec 31, 2024 |
BLACKROCK INC. | 2.67% | 3.4M | -71,816 (-2.11%) | Jun 30, 2024 |
BLACKROCK, INC. | 2.58% | 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/ | 1.73% | 2.2M | -200,781 (-9.10%) | Jun 30, 2026 |
ORBIS ALLAN GRAY LTD | 1.63% | 2.1M | -3.2M (-153.96%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 2.03% | 2.6M | +947 (+0.04%) | Jun 30, 2026 |
NORTHERN FUNDS | 1.88% | 2.4M | +2.4M (+100.00%) | Jun 30, 2026 |
AUGUSTAR VARIABLE INSURANCE PRODUCTS FUND INC | 1.17% | 1.5M | -1.5M (-100.00%) | Jun 30, 2026 |
EMPOWER FUNDS, INC. | 1.06% | 1.4M | 0 (0.00%) | Jun 30, 2026 |
T. Rowe Price Mid-Cap Value Fund, Inc. | 0.89% | 1.1M | -140,289 (-12.31%) | Jun 30, 2026 |
INCOME FUND OF AMERICA | 0.76% | 975,000 | -1.5M (-152.01%) | Jul 31, 2026 |
DFA INVESTMENT DIMENSIONS GROUP INC | 0.73% | 937,441 | +417,840 (+44.57%) | Jul 31, 2026 |
Current Ownership Distribution
- Mutual Funds1.8B (70.15%)
- Institutions715.0M (27.95%)
- Insiders48.7M (1.90%)
- Other0 (0.00%)
Insider Transactions
- 1.90% (48.7M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 1Number of InsiderSelling (last 12 months)
- $240.4MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Darby Tommy VP and CAO | Award | Aug 31, 2026 | $0.00 | 1,791 | $0.00 | 1,791 |
Sabat Carolyn Chao | Award | Aug 14, 2026 | $0.00 | 2,184 | $0.00 | 2,184 |
Lubel Kimberly S | 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 |
MCCOLLUM MARK 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 |
CREGG ROGER A | 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 |
Sheets Jeffrey Wayne | 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 |