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.
David Tsung-Hung Chao, a director of Westlake Corp (WLK), reported changes in his equity holdings. The filing shows direct beneficial ownership of 8,912 shares and indirect beneficial ownership of 19,423 shares held in a trust for which he serves as sole trustee. The filing records restricted stock units (RSUs): 2,168 RSUs were acquired on 08/08/2025 and 1,128 RSUs were modified on 08/09/2025. RSUs convert one-for-one into common stock and, per the filing, all RSUs will vest on 08/08/2026; the 1,128 RSUs were originally granted on 08/09/2024 and vest on their first anniversary.
R. Bruce Northcutt, a director of Westlake Corporation (WLK), reported stock-unit activity on the issuer's Form 4. The Form records activity on 08/08/2025 and 08/09/2025 consisting of restricted stock units and common-stock entries that affect his holdings.
The filing shows 2,168 restricted stock units reported on 08/08/2025 and an additional 1,128 common-stock units reported on 08/09/2025. The restricted stock units convert one-for-one into common stock and are disclosed to vest on August 8, 2026. Following the reported transactions the form shows the reporting person directly beneficially owns 21,183 shares of Westlake common stock. One grant of 1,128 restricted stock units was originally granted on August 9, 2024 and noted as vesting on its first anniversary.
Westlake Corporation (WLK) insider filing shows director Carolyn C. Sabat reported equity award activity on Form 4. The filing records restricted stock unit (RSU) transactions dated 08/08/2025 and 08/09/2025. The RSUs convert into common stock on a one-for-one basis and all RSUs will vest on August 8, 2026. The filing lists an acquisition of 2,168 RSUs on 08/08/2025 and a transaction involving 1,128 RSUs on 08/09/2025, with the entries showing the number of underlying common shares associated with each RSU line.
The reporting person is identified as a director of the issuer. The form is signed by Carolyn C. Sabat by POA J Feng and dated 08/11/2025. The document provides specific grant, conversion, and vesting details but does not include additional context such as exercise prices beyond $0 for the RSUs or the economic rationale for the transactions.
Mark A. McCollum, a director of Westlake Corporation (WLK), converted previously granted restricted stock units into common shares and received a new grant of restricted stock units. On 08/09/2025, 1,128 restricted stock units that had been granted on 08/09/2024 vested and converted one-for-one into 1,128 shares of common stock. After that conversion his reported beneficial ownership of common stock was 9,656 shares.
Separately, on 08/08/2025 he was awarded 2,168 restricted stock units that will vest on 08/08/2026 and convert one-for-one into common shares when they vest. The filing identifies him as a director and shows the holdings as direct beneficial ownership.
Westlake Corporation director Kimberly S. Lubel reported restricted stock unit activity and changes in her direct ownership. On 08/08/2025 she acquired 2,168 restricted stock units that convert one-for-one into common stock and are stated to vest on August 8, 2026. A separate reported transaction on 08/09/2025 involves 1,128 restricted stock units (transaction code M) that the form notes were granted on 08/09/2024 and vest on their first anniversary. Following the reported transactions the form shows 11,653 shares of Westlake common stock beneficially owned by the reporting person in a direct ownership form. The filing lists the reporting persons relationship to the issuer as a director.
Roger A. Cregg, a director of Westlake Corporation (WLK), reported an acquisition of 2,168 restricted stock units (RSUs) on 08/08/2025. The RSUs convert one-for-one into the issuer's common stock, and all units are scheduled to vest on 08/08/2026. The transaction is recorded as an acquisition (A) with an indicated price of $0, reflecting a grant of RSUs rather than a cash purchase. The reported ownership form is direct.
This filing documents an equity grant to a director that will become common shares if vesting conditions are met; no other purchases, sales, or derivative exercises are disclosed in this report.
Jeffrey W. Sheets, a director of Westlake Corporation (WLK), reported restricted stock unit and common share transactions. On 08/08/2025 the filing shows acquisition of 2,168 restricted stock units that convert one-for-one into common stock. A separate reported transaction on 08/09/2025 involves 1,128 restricted stock units with 0 derivative securities shown as held following that transaction.
Following the reported activity the Form 4 lists 12,759 common shares beneficially owned (direct). The filing states all restricted stock units will vest on August 8, 2026 and notes the 1,128-unit grant was made on August 9, 2024 with a one-year vesting schedule.
Westlake Corporation’s Q2-25 results deteriorated sharply. Net sales fell 8% YoY to $2.95 bn, while gross profit shrank 61% to $258 mm as PVC, polyethylene and epoxy pricing remained weak and energy costs stayed elevated. A $115 mm restructuring charge tied to the full closure of the Pernis (Netherlands) epoxy site and other integration costs pushed operating results to a $109 mm loss versus a $406 mm profit last year. After interest and taxes, the company posted a net loss attributable to shareholders of $142 mm (-$1.11 EPS), compared with $313 mm (+$2.42 EPS) in Q2-24.
Segment mix worsened. Performance & Essential Materials swung to a $318 mm operating loss (vs. +$157 mm), weighed by lower vinyls/olefins margins and Pernis charges. Housing & Infrastructure Products remained profitable but EBIT slipped 16% to $222 mm on softer demand.
Liquidity remains solid. Cash & equivalents were $2.1 bn, supplemented by a fully undrawn $1.5 bn revolver; long-term debt rose slightly to $4.65 bn, leaving net cash of about -$2.55 bn. Operating cash flow fell to $58 mm (-86% YoY) on lower earnings and working-capital outflows; capex was $515 mm, still skewed to growth and maintenance projects.
Balance-sheet strength allows dividends to continue ($0.525/sh in Q2). Management expects further Pernis closure costs (~$78 mm future plant shutdown & severance) and is assessing impacts of July 2025 U.S. tax changes, which should reduce cash taxes but have minimal EPS effect.