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Westlake Corporation: filings

Every Westlake Corporation annual and quarterly report in the SEC record with the published financial measures it tagged, 61 filings, each linked to its SEC index.

Filings with published measures

Each page shows what one filing reported, as tagged in that filing, with the periods it covered. Later filings can restate a value; the company overview shows the latest-filed value per period.

FormFiledFiscal periodMeasuresFactsSEC accession
10-Q2026-08-05fiscal Q2 2026481380001262823-26-000032
10-Q2026-05-06fiscal Q1 2026481000001262823-26-000022
10-K2026-02-26fiscal FY 2025561480001262823-26-000016
10-Q2025-10-31fiscal Q3 2025501460001262823-25-000064
10-Q2025-08-06fiscal Q2 2025501420001262823-25-000052
10-Q2025-05-02fiscal Q1 2025501040001262823-25-000029
10-K2025-02-25fiscal FY 2024561500001262823-25-000011
10-Q2024-11-06fiscal Q3 2024501480001262823-24-000053
10-Q2024-08-09fiscal Q2 2024501440001262823-24-000045
10-Q2024-05-02fiscal Q1 2024501060001262823-24-000025
10-K2024-02-22fiscal FY 2023571510001262823-24-000014
10-Q2023-11-02fiscal Q3 2023501500001262823-23-000042
10-Q2023-08-03fiscal Q2 2023501440001262823-23-000031
10-Q2023-05-04fiscal Q1 2023501060001262823-23-000020
10-K2023-02-22fiscal FY 2022571510001262823-23-000011
10-Q2022-11-03fiscal Q3 2022481420001262823-22-000052
10-Q2022-08-03fiscal Q2 2022481380001262823-22-000043
10-Q2022-05-04fiscal Q1 202247980001262823-22-000022
10-K2022-02-23fiscal FY 2021571500001262823-22-000014
10-Q2021-11-03fiscal Q3 2021481440001262823-21-000071
10-Q2021-08-03fiscal Q2 2021481400001262823-21-000059
10-Q2021-05-05fiscal Q1 2021481000001262823-21-000036
10-K2021-02-24fiscal FY 2020552020001262823-21-000023
10-Q2020-11-04fiscal Q3 2020481440001262823-20-000043
10-Q2020-08-06fiscal Q2 2020481400001262823-20-000027
10-Q2020-05-06fiscal Q1 2020491020001262823-20-000015
10-K2020-02-19fiscal FY 2019541980001262823-20-000007
10-Q2019-11-06fiscal Q3 2019491440001262823-19-000050
10-Q2019-08-06fiscal Q2 2019491400001262823-19-000039
10-Q2019-05-02fiscal Q1 201948980001262823-19-000020
10-K2019-02-20fiscal FY 2018521960001262823-19-000012
10-Q2018-11-06fiscal Q3 2018461330001262823-18-000033
10-Q2018-08-02fiscal Q2 2018441280001262823-18-000024
10-Q2018-05-03fiscal Q1 201845960001262823-18-000016
10-K2018-02-21fiscal FY 2017501820001262823-18-000008
10-Q2017-11-07fiscal Q3 2017461320001262823-17-000031
10-Q2017-08-03fiscal Q2 2017441260001262823-17-000024
10-Q2017-05-03fiscal Q1 201744920001262823-17-000016
10-K2017-02-22fiscal FY 2016491810001262823-17-000008
10-Q2016-11-09fiscal Q3 2016451290001262823-16-000049
10-Q2016-08-09fiscal Q2 2016441270001262823-16-000041
10-Q2016-05-04fiscal Q1 201641850001262823-16-000036
10-K2016-02-24fiscal FY 2015491730001262823-16-000030
10-Q2015-11-04fiscal Q3 2015411210001262823-15-000024
10-Q2015-08-05fiscal Q2 2015411200001262823-15-000019
10-Q2015-05-06fiscal Q1 201541870001262823-15-000013
10-K2015-02-25fiscal FY 2014471690001262823-15-000007
10-Q2014-11-07fiscal Q3 2014401180001262823-14-000028
10-Q2014-08-06fiscal Q2 2014381100001262823-14-000021
10-Q2014-05-06fiscal Q1 201437780001262823-14-000014
10-K2014-02-21fiscal FY 2013451620001262823-14-000007
10-Q2013-11-07fiscal Q3 2013391100001262823-13-000035
10-Q2013-07-31fiscal Q2 2013391100001262823-13-000026
10-Q2013-05-07fiscal Q1 201337760001262823-13-000019
10-K2013-02-22fiscal FY 2012441590001262823-13-000007
10-Q2012-11-08fiscal Q3 2012381080001262823-12-000009
10-Q2012-08-03fiscal Q2 2012381070001193125-12-334599
10-Q2012-05-02fiscal Q1 201236740001193125-12-204087
10-K2012-02-23fiscal FY 2011431550001193125-12-075023
10-Q2011-11-02fiscal Q3 201134890001193125-11-292240
10-Q2011-08-03fiscal Q2 201133880001193125-11-207567

Inspect the source

Entity
Westlake Corporation / CIK 0001262823
Captured
2026-09-20T07:47:15.635Z
SEC response SHA-256
cea7c11dfd3af2f332304a11e723d95447af9482ca953a1a21ea51067df2997b

Current SEC company facts · Download the original response snapshot (gzip) · Download the selected JSON

Every published concept a filing tagged, with the periods it covered, as reported in that filing at capture time. Forms 10-K, 10-K/A, 10-Q, 10-Q/A, 20-F, 20-F/A, 40-F, 40-F/A. A filing page needs at least 8 published concepts. Later filings can restate these values; the company history pages show the latest-filed value per period.

Public company accounting reference, not market prices, returns, an investment recommendation, or ALPHAC performance. Validate a separately constructed return series with the validation API; accounting values are not returns.

Use this in research

A financial period ends before its results become public. Use the filing date as a minimum availability boundary, inspect amendments, and retain the original filing vintage when testing historical signals. This latest-filed selection can contain information unavailable at the time.

These pages do not supply prices, total-return histories, corporate-action adjustments or a tradable universe. Build those inputs separately before evaluating a strategy. A profitable backtest can still reflect selection bias or costs that were left out.

Research methodology · Execution and cost assumptions · Check backtest overfitting

Build with the open-source tools

Use these accounting records as inspectable inputs. When you have constructed a return series, the validation tools can help test its statistical evidence and preserve the result with its limitations.

Read the published dataset with Python
import json
from urllib.request import urlopen

with urlopen("https://canlicapital.com/company-data/0001262823.json") as response:
    record = json.load(response)
print(record["fetched_at"])
print(record["policy"])
for concept in record["concepts"]:
    print(concept["tag"], next(iter(concept["observations"])))