Westlake Corporation (NYSE:WLK) Q1 2024 Results Conference Call May 1, 2024 11:00 AM ET Company Participants John Zoeller - Vice President and Treasurer Albert Chao - President, CEO & Director Steve Bender - Executive VP & CFO Jeff Holy - VP & Chief Accounting Officer Conference Call Participants Patrick Cunnigham - Citibank Frank Mitsch - Fermium Research Vincent Andrews - Morgan Stanley Aleksay Yefremov - KeyBanc Hassan Ahmed - Alembic Global Advisors Kevin McCarthy - Vertical Research Partners Michael Si ...

EXHIBIT 99.1 WESTLAKE CORPORATION Contact—(713) 960-9111 Investors—Steve Bender Media—L. Benjamin Ederington Westlake Corporation Reports First Quarter 2024 Results • Record first quarter Housing and Infrastructure Products (HIP) income from operations of $210 million with a 20% operating income margin • HIP EBITDA of $264 million rose 29% year-over-year with a record first quarter EBITDA margin of 25% • PEM sales volume grew 3% sequentially from gradual demand recovery with stable average sales prices HOUS ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-32260 Westlake Corporation (Exact name of registrant as specified in its charter) Delaware 76-0346924 (State or other jurisdictio ...

Westlake Corporation (NYSE:WLK) Q4 2023 Earnings Call Transcript February 20, 2024 11:00 AM ET Company Participants Jeff Holy - VP & Treasurer Albert Chao - President and CEO Steve Bender - EVP and CFO Conference Call Participants Patrick Cunningham - Citi Frank Mitsch - Fermium Research Duffy Fischer - Goldman Sachs Salvator Tiano - Bank of America Mike Leithead - Barclays Arun Viswanathan - RBC Capital Markets Josh Spector - UBS Matthew Blair - TPH Jeff Zekauskas - JPMorgan Turner Hinrichs - Morgan Stanle ...

1 Earnings Presentation 4Q 2023 $93M $390M Net Income(1,2) EBITDA(1,3) $3.3B $291M Free Cash Flow(1,4) Fourth Quarter 2023 Highlights 4Q 2023 Financial Results(1) Improving volume trends provide momentum into 2024 $2.8B Net Sales 67% decrease vs. 3Q 9% decrease vs. 3Q 43% decrease vs. 3Q $0.72 Net Income Per Share(1,2) Cash and Equivalents • Record Housing and Infrastructure Products (HIP) annual income from operations of $710 million reflecting the strength of our brands • Generated free cash flow of $291 ...

Westlake Corporation (NYSE:WLK) Q3 2023 Results Conference Call November 2, 2023 11:00 AM ET Company Participants Jeff Holy - VP and Treasurer Albert Chao - President and CEO Steve Bender - EVP and CFO Conference Call Participants Patrick Cunningham - Citi Frank Mitsch - Fermium Research Bhavesh Lodaya - BMO Capital Markets Matthew Blair - TPH David Begleiter - Deutsche Bank Duffy Fisher - Goldman Sachs Kevin McCarthy - Vertical Research Partners Chris Perrella - UBS Hassan Ahmed - Alembic Global Advisors M ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-32260 Westlake Corporation (Exact name of Registrant as specified in its charter) Delaware 76-0346924 (State or other jurisdiction of (I.R ...

Westlake Corporation (NYSE:WLK) Q2 2023 Earnings Conference Call August 3, 2023 11:00 AM ET Company Participants Jeff Holy - Vice President & Treasurer Albert Chao - President & Chief Executive Officer Steve Bender - Executive Vice President & Chief Financial Officer Conference Call Participants Chris Perrella - UBS Patrick Cunningham - Citi David Begleiter - Deutsche Bank Aleksey Yefremov - KeyBanc Kevin McCarthy - Vertical Research Partners Michael Leithead - Barclays Matthew DeYoe - Bank of America Matth ...

2Q 2023 Earnings Presentation 2 Westlake Second Quarter 2023 Highlights ▪ Net sales of $3.3 billion, net income of $297 million and EBITDA(1) of $690 million ▪ Elevated level of unplanned outages impacted operating income and EBITDA by ~$50 million ▪ Performance and Essential Materials second quarter sales of $2.1 billion with EBITDA(2) of $435 million ▪ Housing and Infrastructure Products second quarter sales of $1.1 billion with EBITDA(3) of $244 million ▪ Raising 2023 cost savings target to $75 - $105 mi ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File No. 001-32260 Westlake Corporation (Exact name of Registrant as specified in its charter) Delaware 76-0346924 (State or other jurisdiction of (I.R.S. E ...