The company
Westlake Corporation
WLK · NYSE
MaterialsChemicalsNot moving yet
WLK stood above a rising 150-day average in 17 of the last 52 weekly readings, and has been out of that trend for the last 23 weeks. It is 26.4% below that average now. Chemicals: 24% of its 85 stocks in an uptrend (−5 points in four weeks); Materials: 18% (−6 points in four weeks).
Statistics
- Rotation
- Not moving yet
- Weeks in an uptrend
- out for 23
- Industry in uptrend
- 24% -5 in 4 wk
- Insider buys, 12 months
- $0
- Insider sales, 12 months
- $17.4M
- Officials’ trades on record
- 37
- Institutions holding
- 331 (+20)
In the rotation
Each square a week: lit when it closed above a rising 150-day average. 17 of 52 weeks.
17 Apr – 16 Oct
Chemicals: A minority of its stocks are in an uptrend and the share has been slipping. Materials: Few of its stocks are in an uptrend and the share has been slipping.
Money in and out
1 Nov 2024 – 1 Oct 2026
Open-market buys above the line and sales below, in dollars.
Congress and officials
37 disclosed lines: House 9, Senate 26, executive 2; 6 people.
| Who | Did | Amount | Traded |
|---|---|---|---|
| Donald J. Trump Executive branch: Office of Government EthicsWhite House Office | sold | $1k–$15k | 27 Jul 2026filed 22 Sep 2026 |
| Donald J. Trump Executive branch: Office of Government EthicsWhite House Office | sold | $1k–$15k | 24 Jun 2026filed 22 Aug 2026 |
| Byron Donalds House: U.S. House ClerkFL19 | sold | $1k–$15k | 12 Aug 2022filed 8 Nov 2024 |
| Byron Donalds House: U.S. House ClerkFL19 | soldspouse | $1k–$15k | 12 Aug 2022filed 8 Nov 2024 |
| Byron Donalds House: U.S. House ClerkFL19 | bought | $1k–$15k | 3 May 2022filed 8 Nov 2024 |
| Byron Donalds House: U.S. House ClerkFL19 | boughtspouse | $1k–$15k | 3 May 2022filed 8 Nov 2024 |
| Susie Lee House: U.S. House ClerkNV03 | sold | $1k–$15k | 10 Jun 2021filed 13 Jul 2021 |
| Peter Meijer House: U.S. House ClerkMI03 | sold | $1k–$15k | 16 Feb 2021filed 16 Mar 2021 |
| Susie Lee House: U.S. House ClerkNV03 | bought | $1k–$15k | 16 Dec 2020filed 11 Jan 2021 |
| Susie Lee House: U.S. House ClerkNV03 | bought | $1k–$15k | 10 Dec 2020filed 11 Jan 2021 |
| James Comer House: U.S. House ClerkKY01 | sold | $1k–$15k | 6 Aug 2020filed 24 Aug 2020 |
| David Perdue Senate: U.S. Senate eFDSenator | soldjoint | $1k–$15k | 14 Aug 2017filed 28 Aug 2017 |
Insiders
Buy orders, 12 months0
Sale orders, 12 months5
Buyers · sellers0 · 3
| Who | Did | Shares | Traded |
|---|---|---|---|
| Albert ChaoExecutive Chairman | sold | 7,489at $79.70 | 11 Aug 2026filed 11 Aug 2026 |
| Albert ChaoExecutive Chairman | sold | 31,384at $80.42 | 11 Aug 2026filed 11 Aug 2026 |
| Mark Steven BenderEVP & CFO | sold | 16,413at $112.54 | 27 Mar 2026filed 30 Mar 2026 |
| Robert F. BuesingerEVP, PEM Segment Head | sold | 4,000at $115.25 | 27 Mar 2026filed 31 Mar 2026 |
| Mark Steven BenderEVP & CFO | sold | 16,988at $100.91 | 27 Feb 2026filed 2 Mar 2026 |
| Mark Steven BenderEVP & CFO | sold | 421at $101.52 | 27 Feb 2026filed 2 Mar 2026 |
Lines filed since 2 January 2026, newest first; every insider’s older lines are on their own page.
Institutions
Holders331+20 on the quarter
New · exited86 · 64
Reported value$2.7B
Quarter to 30 Jun 2026, against 31 Mar 2026; newest filing 31 Aug 2026.
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc.added · filed 7 Aug 2026 | 3,294,162$240.5M | +215,075+7.0% |
| Capital World Investorsreduced · filed 12 Aug 2026 | 2,842,348$207.5M | -1,368,658−32.5% |
| Orbis Allan Gray Ltdreduced · filed 14 Aug 2026 | 2,084,364$152.2M | -3,209,155−60.6% |
| DIMENSIONAL FUND ADVISORS LPadded · filed 11 Aug 2026 | 2,051,554$149.8M | +585,534+39.9% |
| VANGUARD PORTFOLIO MANAGEMENT LLCreduced · filed 13 Aug 2026 | 1,752,627$127.9M | -17,181−1.0% |
| BRANDES INVESTMENT PARTNERS, LPreduced · filed 14 Aug 2026 | 1,572,939$114.8M | -269,711−14.6% |
| AQR CAPITAL MANAGEMENT LLCadded · filed 14 Aug 2026 | 1,570,453$114.6M | +1,310,383+503.9% |
| VANGUARD CAPITAL MANAGEMENT LLCadded · filed 13 Aug 2026 | 1,464,223$106.9M | +8,629+0.6% |
| STATE STREET CORPadded · filed 7 Aug 2026 | 1,453,407$106.1M | +72,914+5.3% |
| GOLDMAN SACHS GROUP INCreduced · filed 14 Aug 2026 | 1,280,873$93.5M | -112,454−8.1% |
31 Mar 2023 – 30 Jun 2026
News
Westlake Royal Building Products™ Enters Standing-Seam Roofing Market Through Purchase of Roofing Assetsmanilatimes.net · 1 Oct 2026Westlake announced closure of PVC plant in Germanyhydrocarbonprocessing.com · 1 Oct 2026Westlake Corporation: Westlake to Optimize European Chlorovinyls Footprint with Closure of Cologne PVC Plantfinanznachrichten.de · 29 Sep 2026New Mid-America® Gable Vents From Westlake Royal Building Products™ Combine Architectural Style With Easy Installationmanilatimes.net · 28 Sep 2026Westlake's (WLK) Second Quarter Turned Two Straight Losses Into Profitinsidermonkey.com · 16 Sep 2026
Everyone who traded it
Same industry
Government contracts
No federal award is tied to it.
From its SEC filings
Analyst forecasts
No analyst forecasts yet.