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.
The Westlake Corporation (NYSE: WLK) SEC filings page on Stock Titan provides direct access to the company’s regulatory disclosures, including current reports on Form 8-K and other key documents filed with the U.S. Securities and Exchange Commission. Westlake is a Houston-headquartered global manufacturer and supplier of materials and products serving housing and construction, packaging, healthcare, automotive and consumer goods, and its filings offer detailed insight into these activities.
Recent Form 8-K filings describe a range of material events. These include the announcement and completion of Westlake’s acquisition of the global compounding solutions businesses of the ACI/Perplastic Group, which expands Westlake Global Compounds’ presence in specialty materials for the wire and cable sectors and extends its manufacturing footprint into Portugal, Romania and Tunisia. Other 8-Ks outline an underwriting agreement and the issuance of senior notes due 2035 and 2055, the commencement and pricing of a cash tender offer for 3.600% senior notes due 2026, and the results of that tender offer.
Filings also cover operational decisions, such as an 8-K reporting a plan to cease operation of certain North American chlorovinyl production facilities and a styrene plant at Lake Charles, Louisiana, while continuing to supply PVC, VCM and chlor-alkali products from seven other North American chlorovinyl facilities. Additional 8-Ks furnish quarterly earnings press releases, investor presentations and dividend announcements.
On Stock Titan, these SEC filings are paired with AI-powered summaries that explain the core points of each document in plain language. Users can quickly understand the significance of a tender offer, a new debt issuance, an acquisition closing or a capacity rationalization without reading every page. The filings page updates as new documents are posted to EDGAR, helping investors follow Westlake’s material events, financing activities and strategic moves through its official disclosures.
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.
Westlake Corp executive vice president and CFO Mark Steven Bender reported multiple equity compensation transactions. He received a grant of 28,389 employee stock options and 7,747 restricted stock units on February 20, 2026, both held directly.
On February 19, 2026, 1,777 shares of common stock vested after performance criteria were certified for previously granted performance stock units. To cover tax obligations from this vesting, 445 common shares were disposed of at a weighted average price of about $94.10, leaving the CFO with 61,842 common shares directly owned. The stock options vest in three annual installments starting in 2027, and all RSUs vest on February 20, 2029.
Westlake Corp director John Tsung-chen Chao reported multiple equity award transactions. On February 20, 2026, he received an employee stock option for 4,044 shares at an exercise price of $0.00 and two restricted stock unit (RSU) grants covering 1,104 and 2,434 RSUs, each RSU representing one share of common stock, with all RSUs vesting on February 20, 2029. On February 19, 2026, 213 shares of common stock vested upon satisfaction of performance criteria for previously granted performance stock units, and he acquired these shares as a grant. Also on February 20, 2026, 91 shares of common stock were disposed of at $94.10 per share to cover tax obligations related to PSU vesting, leaving him with 7,888 common shares directly owned.
Westlake Corp Executive Chairman Albert Chao reported several equity compensation transactions. He received a grant of 54,763 employee stock options on common shares and 14,945 restricted stock units, both at a grant price of $0.00 per unit. The options become exercisable in three installments of 33%, 33%, and 34% on February 20, 2027, February 20, 2028, and February 20, 2029, respectively, and all RSUs vest on February 20, 2029. He also acquired 6,193 shares of common stock upon vesting of performance stock units tied to performance criteria. To cover tax obligations from this vesting, 2,501 common shares were disposed of at a weighted average price of about $94.10 per share, in multiple transactions within a disclosed price range.
Westlake Corp Senior Chairman James Chao reported multiple equity compensation transactions. He received an employee stock option grant for 27,382 shares and 7,472 restricted stock units, both awarded at no cash cost as part of his compensation.
Performance-based stock units also vested into common shares. This vesting delivered 3,884 shares of common stock, while 1,569 shares were disposed of to satisfy tax obligations at a weighted average price of $94.101 per share. After these transactions, he directly holds 49,774 common shares, plus the newly granted options and RSUs.
Westlake Corp senior vice president Scott Thomas Szwejbka reported equity award activity involving restricted stock units and common shares. On February 17, 2026, 977 restricted stock units vested and were converted on a one-for-one basis into 977 shares of common stock. On February 18, 2026, 295 of those shares were withheld at a reference price of $98.95 per share to cover tax obligations arising from the RSU vesting. After these transactions, Szwejbka directly owned 13,499 shares of Westlake common stock.
Westlake Corp vice president and chief accounting officer Jeffrey Adam Holy reported routine equity award activity. On February 17, 706 restricted stock units granted in 2023 vested and converted into 706 shares of common stock on a one-for-one basis, increasing his direct holdings. On February 18, 213 of those shares, valued at $98.95 per share, were withheld to cover tax obligations arising from the RSU vesting, leaving him with 4,941 shares of common stock held directly.
Westlake Corp executive reports RSU vesting and related share movements. EVP, Legal & External Affairs L. Benjamin Ederington exercised 3,809 restricted stock units, which converted into an equal number of Westlake common shares. These RSUs were originally granted in 2023 and vested on the third anniversary of the grant.
To cover tax obligations from the RSU vesting, 978 common shares otherwise issuable were withheld through a tax-withholding disposition, rather than an open-market sale. After these transactions, Ederington directly holds 79,090 shares of Westlake common stock.