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Equity · Basic Materials

WLK

NYSE

Westlake (WLK)

77.65 USD +0.77% vs prior close
Westlake Corporation price graph

This price chart is drawn by TradingView, from their own data, in an embed loaded from their servers.

Track this symbol on TradingView
Market cap
9.9B USD
Revenue, year to Dec 2025
11.2B USD
EPS, diluted, year to Dec 2025
−11.70 USD
52-week range
56 USD – 123.44 USD
Avg volume
335.1K

as of Jul 17, 2026

Have Westlake (WLK) insiders bought or sold shares recently?

WLK's newest Form 4 filing is dated 11 August 2026: none in the last 90 days.

Form 4

Have Westlake (WLK) insiders bought or sold shares recently?
ReportedInsiderTypeSharesValue
11 Aug 2026Chao AlbertExecutive ChairmanSell38,8733.1M USD
27 Mar 2026Buesinger Robert F.EVP, PEM Segment HeadSell4,000461K USD
27 Mar 2026Bender Mark StevenEVP & CFOSell16,4131.8M USD
27 Feb 2026Bender Mark StevenEVP & CFOSell17,4091.8M USD
22 Dec 2025Chao AlbertExecutive ChairmanSell40,8363.0M USD
Sold5 open-market sales117,531$10.19M
48 other filings: grants, exercises, tax withholding and transfers, not trades
Have Westlake (WLK) insiders bought or sold shares recently?
ReportedInsiderTypeSharesValue
11 Aug 2026Chao AlbertExecutive ChairmanOption exercise38,8732.4M USD
08 Aug 2026Sheets Jeffrey WayneDirectorOption exercise2,168
08 Aug 2026Sabat Carolyn ChaoDirectorOption exercise2,168
08 Aug 2026NORTHCUTT R BRUCEDirectorOption exercise2,168
08 Aug 2026MCCOLLUM MARK ADirectorOption exercise2,168
08 Aug 2026Lubel Kimberly SDirectorOption exercise2,168
08 Aug 2026Graff Michael JDirectorOption exercise2,168
08 Aug 2026CREGG ROGER ADirectorOption exercise2,168
08 Aug 2026Chao David Tsung-HungDirectorOption exercise2,168
08 Aug 2026Chao Catherine T.DirectorOption exercise2,168
13 May 2026Bender Mark StevenEVP & CFOTax withheld5,284514K USD
12 May 2026Bender Mark StevenEVP & CFOOption exercise13,164

Showing the 12 most recent of 48 compensation filings in this window. The figures above count all of them.

Which funds hold Westlake (WLK)?

11 of the 45 institutional funds we track reported a Westlake position for the quarter ended 30 Jun 2026 — a combined 306.9M USD; the latest of those filings landed 02 Sep 2026.

Form 13F

Which funds hold Westlake (WLK)?
FundPositionSharesValueShares q/q
AQR Capital ManagementAdded1,570,453114.6M USD+503.9%
Citadel AdvisorsAdded1,054,86877.0M USD+47.4%
Balyasny Asset ManagementAdded625,85945.7M USD+69.3%
Millennium ManagementAdded366,07426.7M USD+330.7%
D. E. Shaw & Co.Held (±25%)200,53414.6M USD−14.0%
Marshall WaceNew position111,5748.1M USD
Tudor Investment CorpNew position110,7108.1M USD
Point72 Asset ManagementNew position89,7316.6M USD
Two Sigma InvestmentsNew position45,3573.3M USD
Man GroupTrimmed25,7051.9M USD−84.0%

Showing the 10 largest of 11 reported positions. The figures above count all of them.

Have members of Congress traded Westlake (WLK)?

The most recent congressional trade disclosed in Westlake is a sale by Susie Lee (house, NV), dated 10 Jun 2021.

STOCK Act disclosures

Have members of Congress traded Westlake (WLK)?
TradedMemberTypeAmountFiled after
10 Jun 2021Susie Leehouse · Democrat–NVSale1K USD–15K USD33 days
10 Dec 2020Susie Leehouse · Democrat–NVPurchase1K USD–15K USD32 days

What has been filed or recorded for Westlake (WLK)?

The filings we hold for Westlake, newest first: 1 fails-to-deliver day, 6 quarterly earnings reports, 2 annual reports and 5 reported financial figures, the latest dated 02 Oct 2026. No next earnings date is announced in SEC filings yet.

What has been filed or recorded for Westlake (WLK)?
And
02 Oct 2026Fails to deliverShares failed to deliver23,837 shares1.5M USD notional · 0.019% of shares out
30 Sep 2026Quarterly earningsQ3 2026 reportedEPS 0.05 USDRevenue $2.98B
30 Sep 2026FinancialsTotal assets19.3B USDat period end
30 Sep 2026FinancialsTotal equity8.7B USDat period end
30 Jun 2026Quarterly earningsQ2 2026 reportedEPS 2.01 USDRevenue $3.27B
31 Mar 2026Quarterly earningsQ1 2026 reportedEPS −1.31 USDRevenue $2.65B
31 Dec 2025Annual reportFY 2025 reportedEPS −11.70 USDRevenue $11.17B
31 Dec 2025FinancialsRevenue11.2B USDfiscal year
31 Dec 2025FinancialsNet income−1.5B USDfiscal year
31 Dec 2025FinancialsDiluted EPS−11.70 USDfiscal year
30 Sep 2025Quarterly earningsQ3 2025 reportedEPS −6.06 USDRevenue $2.84B
30 Jun 2025Quarterly earningsQ2 2025 reportedEPS −1.11 USDRevenue $2.95B
31 Mar 2025Quarterly earningsQ1 2025 reportedEPS −0.31 USDRevenue $2.85B
31 Dec 2024Annual reportFY 2024 reportedEPS 4.64 USDRevenue $12.14B

What do people ask about Westlake (WLK)?

From live data
What is Westlake’s market cap?9.9B

Westlake is worth 9.9B USD by market value as of 17 Jul 2026, which is the share price times the shares on issue from its SEC filings.

What is Westlake’s revenue?11.2B

Westlake reported revenue of 11.2B USD for the year ended 31 Dec 2025, as filed with the SEC. See Filings

Have Westlake insiders bought or sold shares recently?

No Westlake insider has filed a Form 4 in the last 90 days; the most recent filing we hold is dated 11 Aug 2026 (SEC Form 4). See Insiders

Which funds own Westlake?11 of 45

11 of the 45 funds we track reported a Westlake position for the quarter ended 30 Jun 2026, per their SEC Form 13F filings. The largest reported positions were AQR Capital Management, Citadel Advisors and Balyasny Asset Management. See Funds

Have members of Congress traded Westlake?2 trades

Yes. 2 trades in Westlake appear in the congressional disclosures we hold; the latest is a sale by Susie Lee (House, NV) dated 10 Jun 2021, filed 13 Jul 2021. Amounts are disclosed as ranges, and a filing can follow the trade by up to 45 days. See Congress

When did Westlake last report earnings?0.05

Westlake last reported earnings on 30 Sep 2026 for Q3 2026, with EPS of 0.05 USD; no next date is announced in SEC filings yet. See Filings

Answers are generated from the live figures on this page — Reddit crowd data, SEC filings and open company records — and update as the data does.

References
  1. Finazonprior-day close, indicative (IEX-derived, not the official close)
  2. TradingViewthe price chart widget, drawn by TradingView from their own data
  3. SEC EDGARForm 4 filings (insider transactions)
  4. SEC EDGAR13F filings
  5. Wikimedia CommonsPortraits via Wikimedia Commons. Susie Lee: Eric Connolly, Public domain.
  6. House disclosuresU.S. House of Representatives financial disclosures
  7. SECSEC fails-to-deliver (CNS) data
  8. SEC EDGARXBRL company facts, latest period ended 30 Sep 2026
  9. SEC EDGARreported earnings figures and scheduled report dates
  10. SEC EDGARValuation computed from SEC EDGAR filings
  11. Wikipediatext of the lead paragraph, licensed CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/) — https://en.wikipedia.org/wiki/Westlake_Corporation