Welcome to our dedicated page for WESTLAKE CORPORATION SEC filings (Ticker: WLK), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Westlake Corporation filings document formal disclosures for a NYSE-listed manufacturer of performance and essential materials and housing and infrastructure products. Recent 8-K reports furnish quarterly and annual results, investor presentations, executive appointments, litigation developments involving PVC pipe and fittings, and material agreements tied to credit facilities.
Proxy and event filings also describe board and compensation matters, registered securities including common stock and senior notes, capital-structure terms, legal contingencies, and governance topics related to Westlake's operating segments and public-company reporting obligations.
Westlake Corporation provides a detailed annual overview of its global chemicals and building-products operations, organized into Housing and Infrastructure Products (HIP) and Performance and Essential Materials (PEM).
The company reports HIP brands spanning siding, roofing, windows, pipe, fittings and PVC compounds, largely supplied by its own PVC production. PEM includes ethylene, polyethylene, chlor-alkali, PVC and epoxy, with approximately 39.2 billion pounds per year of production capacity across North America, Europe and Asia as of February 18, 2026.
Westlake highlights sustainability and environmental spending, with $49 million of 2025 capital expenditures for environmental compliance and planned $103 million in 2026 and $125 million in 2027. It notes market, trade, energy, climate and regulatory risks, as well as plant closures and expansions, and emphasizes a workforce of about 14,600 employees worldwide. The aggregate market value of voting stock held by non‑affiliates was about $2.5 billion on June 30, 2025, with 127,910,338 common shares outstanding as of February 18, 2026.
Westlake Corporation reported weak fourth-quarter and full-year 2025 results heavily affected by restructuring and shutdown charges. In the fourth quarter, net sales were $2.5 billion with a net loss of $544 million, or $4.22 per share, and EBITDA of negative $315 million. Identified shutdown and restructuring items totaling $511 million drove most of the loss; excluding these, the quarter showed a net loss of $33 million, or $0.25 per share, and EBITDA of $196 million.
For 2025, net sales were $11.2 billion and Westlake recorded a net loss of $1.508 billion versus net income of $602 million in 2024, including a $727 million goodwill write-off and other shutdown-related charges. On an adjusted basis excluding Identified Items, the full-year net loss was $116 million and EBITDA was $1.1 billion, down sharply from $2.3 billion in 2024, mainly due to lower prices and volumes and higher feedstock and energy costs.
The Housing and Infrastructure Products segment remained profitable with 2025 EBITDA of $839 million, while Performance and Essential Materials generated a full-year operating loss of $724 million even before Identified Items. Management highlighted a three‑pillar profitability improvement plan—footprint optimization, structural cost savings, and improved plant reliability—targeting a $600 million EBITDA uplift in 2026. The company achieved $170 million of cost savings in 2025 and ended the year with $2.9 billion of cash and securities and $5.6 billion of total debt.
Patel Bhavesh V. reported acquisition or exercise transactions in this Form 4 filing.
Westlake Corp director Bhavesh V. Patel received a grant of 1,852 restricted stock units. These units were awarded at a price of $0.00 per unit and each unit represents the right to receive one share of Westlake common stock. All 1,852 restricted stock units will vest on February 20, 2027, meaning the shares are delivered only if the vesting conditions are met. After this award, Patel directly holds 1,852 restricted stock units.
Westlake Corp director Bhavesh V. Patel filed an initial Form 3, which is a baseline disclosure of his status as a director and any reportable holdings when he became subject to insider reporting rules. This filing does not list any buy or sell transactions.
Westlake Corporation announced that Executive Vice President and Chief Financial Officer M. Steven Bender plans to retire, with his departure effective when a successor is appointed. This signals an upcoming leadership transition in the company’s finance organization.
The board of directors was expanded to fourteen members and elected Bhavesh V. “Bob” Patel and President and CEO Jean-Marc Gilson as directors effective February 20, 2026. Patel will serve as a Class III director through the 2028 annual meeting and is expected to join multiple board committees. He will receive restricted stock units with a grant date fair value of $175,000 that vest on February 20, 2027. Gilson will serve as a Class I director through the 2026 annual meeting and will not receive additional compensation for his board service. The company also furnished a press release describing these board appointments.
Westlake Corp SVP Scott Thomas Szwejbka reported several equity compensation transactions. On February 20, 2026, he received an employee stock option grant for 14,595 shares at an exercise price of $0.00 per share and 3,983 restricted stock units, both held directly.
On February 19, 2026, 365 shares of common stock were acquired following the vesting of performance stock units granted on February 17, 2023, after performance criteria were certified. Also on February 20, 2026, 91 shares of common stock were disposed of at $94.10 per share to satisfy tax obligations from the PSU vesting, leaving 13,773 common shares held directly.
Westlake Corp vice president and chief accounting officer Jeffrey Adam Holy reported multiple equity awards and a small tax-related share disposition. On February 20, 2026, he was granted employee stock options covering 4,394 shares and restricted stock units (RSUs) for 1,199 and 2,540 shares, all at a grant price of $0.0000 per share.
According to the filing, the stock options vest in three installments of 33%, 33%, and 34% on February 20, 2027, February 20, 2028, and February 20, 2029, and all RSUs will vest on February 20, 2029. He also acquired 264 shares of common stock on February 19, 2026 upon performance stock unit vesting, while 81 shares were withheld at $94.10 per share to cover tax obligations.
Westlake Corp President and CEO Jean-Marc Gilson reported equity awards consisting of stock options and restricted stock units. He was granted 109,139 employee stock options at an exercise price of $0.00 and 29,784 restricted stock units, each RSU representing the right to receive one share of common stock. The options become exercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, while all RSUs vest on February 20, 2029.
Westlake Corp executive L. Benjamin Ederington reported equity awards and related tax withholding transactions. On February 20, 2026, he received 25,656 employee stock options at an exercise price of $0.0000 per share. According to the disclosure, these options become exercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively.
He was also granted 7,002 restricted stock units, each representing a contingent right to receive one share of common stock, which are scheduled to vest on February 20, 2029. In addition, 1,425 shares of common stock were acquired on February 19, 2026 upon the vesting of performance stock units, following the compensation committee’s confirmation that performance criteria were satisfied. To cover tax obligations from this vesting, 357 shares of common stock were disposed of at a weighted-average price of $94.102 per share. After these transactions, he directly owned 80,158 common shares.
Westlake Corp executive Robert F. Buesinger reported multiple equity compensation transactions. On February 20, 2026, he received an employee stock option grant for 19,351 options at an exercise price of $0.00 per share, which become exercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029. He also received 5,281 restricted stock units, each representing one share of common stock, which will fully vest on February 20, 2029.
Separately, on February 19, 2026, 1,301 shares of common stock vested upon satisfaction of performance criteria under performance stock units granted in 2023. To satisfy tax obligations from this vesting, 326 shares of common stock were disposed of at a weighted average price of $94.101 per share in multiple transactions between $94.10 and $94.29, leaving him with 38,482 common shares held directly.