Westlake
WLK · NYSE
$62.69+$0.40 (+0.64%)TodayMarket closed ·
Prev close $62.29
Who owns WLK
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 87.2% of WLK’s shares.
- TTWF, L.P.72.9%
- Capital World Investors2.2%
- BlackRock Institutional Trust Company, N.A.2.2%
- T. Rowe Price Associates, Inc.1.7%
- Next 6 largest institutions8.2%
- All other shareholders12.8%
| Holder | Shares | % of shares |
|---|---|---|
| TTWF, L.P. | 93.41M | 72.90% |
| Capital World Investors | 2.84M | 2.22% |
| BlackRock Institutional Trust Company, N.A. | 2.80M | 2.19% |
| T. Rowe Price Associates, Inc. | 2.17M | 1.70% |
| Orbis Investment Management Ltd. | 2.08M | 1.63% |
| Dimensional Fund Advisors, L.P. | 2.05M | 1.60% |
| Vanguard Portfolio Management, LLC | 1.75M | 1.37% |
| Brandes Investment Partners, L.P. | 1.57M | 1.23% |
| AQR Capital Management, LLC | 1.57M | 1.23% |
| Vanguard Capital Management, LLC | 1.46M | 1.14% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| American Funds Income Fund of America | 2.46M | 1.92% |
| iShares Core S&P Mid-Cap ETF | 1.17M | 0.91% |
| T. Rowe Price Mid-Cap Value Fund | 1.14M | 0.89% |
| Vanguard Total Stock Market Index Fund | 1.02M | 0.80% |
| Global X US Infrastructure Development ETF | 1.02M | 0.80% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $3.12M (2 trades) of WLK on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Darby Tommy | Award | 1.79K | — |
| Sheets Jeffrey Wayne | Award | 2.18K | — |
| Sabat Carolyn Chao | Award | 2.18K | — |
| Patel Bhavesh V. | Award | 2.18K | — |
| NORTHCUTT R BRUCE | Award | 2.18K | — |
| Lubel Kimberly S | Award | 2.18K | — |
| Graff Michael J | Award | 2.18K | — |
| Chao David Tsung-Hung | Award | 2.18K | — |
| Chao Catherine T. | Award | 2.18K | — |
| CREGG ROGER A | Award | 2.18K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 4.87M
- Days to cover
- 6.71
- % of shares outstanding
- 3.80%
- Average daily volume
- 725.20K
- Change since last report
- −8.3%
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