# Westlake Corp: overview

WLK · NYSE · CIK 1262823 · [Materials](/sectors/materials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/wlk.md) · [Financials](/companies/wlk/financials.md) · [Filings](/companies/wlk/filings.md) · [Insiders](/companies/wlk/insiders.md)

Latest reported revenue: [$3.27bn](/filings/0001262823-26-000032.md) for Q2 FY2026, three months to 2026-06-30, from the 10-Q filed Aug 5, 2026 (XBRL us-gaap:Revenues, accession 0001262823-26-000032).

## Last eight quarters

| Line item | Unit | Q3 FY2024 (2024-09-30) | Q4 FY2024 (2024-12-31) | Q1 FY2025 (2025-03-31) | Q2 FY2025 (2025-06-30) | Q3 FY2025 (2025-09-30) | Q4 FY2025 (2025-12-31) | Q1 FY2026 (2026-03-31) | Q2 FY2026 (2026-06-30) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [3,117](/filings/0001262823-25-000064.md) | [2,843 d](/filings/0001262823-26-000016.md) | [2,846](/filings/0001262823-26-000022.md) | [2,953](/filings/0001262823-26-000032.md) | [2,838](/filings/0001262823-25-000064.md) | [2,533 d](/filings/0001262823-26-000016.md) | [2,652](/filings/0001262823-26-000022.md) | [3,271](/filings/0001262823-26-000032.md) |
| Gross margin | % | [16.0%](/filings/0001262823-25-000064.md) | [11.5% d](/filings/0001262823-26-000016.md) | [8.2%](/filings/0001262823-26-000022.md) | [8.7%](/filings/0001262823-26-000032.md) | [8.3%](/filings/0001262823-25-000064.md) | [3.4% d](/filings/0001262823-26-000016.md) | [4.2%](/filings/0001262823-26-000022.md) | [19.9%](/filings/0001262823-26-000032.md) |
| Operating margin | % | [5.8%](/filings/0001262823-25-000064.md) | [2.3% d](/filings/0001262823-26-000016.md) | [(1.1%)](/filings/0001262823-26-000022.md) | [(3.7%)](/filings/0001262823-26-000032.md) | [(27.0%)](/filings/0001262823-25-000064.md) | [(26.5%) d](/filings/0001262823-26-000016.md) | [(6.5%)](/filings/0001262823-26-000022.md) | [11.1%](/filings/0001262823-26-000032.md) |
| Net margin | % | [3.5%](/filings/0001262823-25-000064.md) | [0.2% d](/filings/0001262823-26-000016.md) | [(1.4%)](/filings/0001262823-26-000022.md) | [(4.8%)](/filings/0001262823-26-000032.md) | [(27.6%)](/filings/0001262823-25-000064.md) | [(21.5%) d](/filings/0001262823-26-000016.md) | [(6.4%)](/filings/0001262823-26-000022.md) | [7.9%](/filings/0001262823-26-000032.md) |
| Diluted EPS | $ per share | [0.83](/filings/0001262823-25-000064.md) | not reported | [(0.31)](/filings/0001262823-26-000022.md) | [(1.11)](/filings/0001262823-26-000032.md) | [(6.06)](/filings/0001262823-25-000064.md) | not reported | [(1.31)](/filings/0001262823-26-000022.md) | [2.01](/filings/0001262823-26-000032.md) |
| Free cash flow | $m | [254 d](/filings/0001262823-25-000064.md) | [149 d](/filings/0001262823-26-000016.md) | [(325)](/filings/0001262823-26-000022.md) | [(132) d](/filings/0001262823-26-000032.md) | [(57.0) d](/filings/0001262823-25-000064.md) | [(16.0) d](/filings/0001262823-26-000016.md) | [(303)](/filings/0001262823-26-000022.md) | [111 d](/filings/0001262823-26-000032.md) |

- Revenue. XBRL Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 9-month figure less the 6-month figure; 12-month figure less the 9-month figure; 6-month figure less the 3-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2021-12-31) | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | FY2025 (2025-12-31) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $bn | [11.8](/filings/0001262823-24-000014.md) | [15.8](/filings/0001262823-25-000011.md) | [12.5](/filings/0001262823-26-000016.md) | [12.1](/filings/0001262823-26-000016.md) | [11.2](/filings/0001262823-26-000016.md) |
| Gross margin | % | [29.7%](/filings/0001262823-24-000014.md) | [25.8%](/filings/0001262823-25-000011.md) | [17.7%](/filings/0001262823-26-000016.md) | [16.1%](/filings/0001262823-26-000016.md) | [7.3%](/filings/0001262823-26-000016.md) |
| Operating margin | % | [23.8%](/filings/0001262823-24-000014.md) | [19.3%](/filings/0001262823-25-000011.md) | [5.8%](/filings/0001262823-26-000016.md) | [7.2%](/filings/0001262823-26-000016.md) | [(14.1%)](/filings/0001262823-26-000016.md) |
| Net margin | % | [17.1%](/filings/0001262823-24-000014.md) | [14.2%](/filings/0001262823-25-000011.md) | [3.8%](/filings/0001262823-26-000016.md) | [5.0%](/filings/0001262823-26-000016.md) | [(13.5%)](/filings/0001262823-26-000016.md) |
| Diluted EPS | $ per share | [15.58](/filings/0001262823-24-000014.md) | [17.34](/filings/0001262823-25-000011.md) | [3.70](/filings/0001262823-26-000016.md) | [4.64](/filings/0001262823-26-000016.md) | [(11.70)](/filings/0001262823-26-000016.md) |
| Free cash flow | $bn | [1.7](/filings/0001262823-24-000014.md) | [2.3](/filings/0001262823-25-000011.md) | [1.3](/filings/0001262823-26-000016.md) | [0.3](/filings/0001262823-26-000016.md) | [(0.5)](/filings/0001262823-26-000016.md) |

- Revenue. XBRL Revenue: us-gaap:Revenues.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:Revenues.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:Revenues.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:Revenues.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/wlk/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $240.5m | 3,294,162 |  | Added +215,075 |
| [Capital World Investors](/funds/1422849.md) | 2026-06-30 | $207.5m | 2,842,348 |  | Reduced −1,368,658 |
| [Orbis Allan Gray Ltd](/funds/1663865.md) | 2026-06-30 | $152.2m | 2,084,364 |  | Reduced −3,209,155 |
| [DIMENSIONAL FUND ADVISORS LP](/funds/354204.md) | 2026-06-30 | $149.8m | 2,051,554 |  | Added +585,534 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $127.9m | 1,752,627 |  | Reduced −17,181 |
| [BRANDES INVESTMENT PARTNERS, LP](/funds/1015079.md) | 2026-06-30 | $114.8m | 1,572,939 |  | Reduced −269,711 |
| [AQR CAPITAL MANAGEMENT LLC](/funds/1167557.md) | 2026-06-30 | $114.6m | 1,570,453 |  | Added +1,310,383 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $106.9m | 1,464,223 |  | Added +8,629 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $106.1m | 1,453,407 |  | Added +72,914 |
| [GOLDMAN SACHS GROUP INC](/funds/886982.md) | 2026-06-30 | $93.5m | 1,280,873 |  | Reduced −112,454 |

## Recent filings

[All 1,422 filings](/companies/wlk/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-09-29 | 02:06 ET | [8-K](/filings/0001262823-26-000067.md) | 2.05 Exit or disposal costs; 7.01 Regulation FD disclosure | 0001262823-26-000067 |
| 2026-08-31 | 17:00 ET | [8-K](/filings/0001193125-26-376996.md) | 5.02 Departure or appointment of officers or directors | 0001193125-26-376996 |
| 2026-08-05 | 14:27 ET | [10-Q](/filings/0001262823-26-000032.md) | Quarterly report, period 2026-06-30 | 0001262823-26-000032 |
| 2026-08-04 | 07:27 ET | [8-K](/filings/0001262823-26-000026.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001262823-26-000026 |
| 2026-07-29 | 16:45 ET | [8-K](/filings/0001193125-26-324110.md) | 8.01 Other events | 0001193125-26-324110 |
| 2026-06-15 | 16:45 ET | [8-K](/filings/0001193125-26-271206.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-271206 |
| 2026-05-18 | 17:00 ET | [8-K](/filings/0001193125-26-229093.md) | 5.07 Shareholder vote results | 0001193125-26-229093 |
| 2026-05-06 | 13:49 ET | [10-Q](/filings/0001262823-26-000022.md) | Quarterly report, period 2026-03-31 | 0001262823-26-000022 |
| 2026-05-05 | 07:30 ET | [8-K](/filings/0001262823-26-000019.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001262823-26-000019 |
| 2026-05-01 | 07:08 ET | [8-K](/filings/0001193125-26-199067.md) | 7.01 Regulation FD disclosure | 0001193125-26-199067 |

## Latest annual report

[Form 10-K for the fiscal year ended Dec 31, 2025](/filings/0001262823-26-000016.md), filed Feb 26, 2026.

## Forecast league

Q3 FY2026, the quarter ended 2026-09-30, is open for forecasts until the first results filing for it is accepted by EDGAR. Results are due by \[object Promise\]. [Forecast this quarter](/leagues/2026q3/targets/6fbf6487-cf51-4325-96d3-e58605fce9e6)

## About the filer

- CIK: 1262823
- Tickers: WLK
- Exchange: NYSE
- SIC code: 2860 Industrial Organic Chemicals
- State of incorporation: DE
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:35 ET. No prices; not investment advice.