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Westlake Corp’s executive chairman and director reported an option exercise and share sales in the company’s common stock. On 12/22/2025, he exercised an employee stock option to acquire 81,673 shares of common stock at an exercise price of $44.42 per share, increasing his direct holdings.
That same day, he sold shares in several open-market transactions, including 9,711 shares at a weighted average price of $72.818, 30,604 shares at a weighted average price of $73.796, and 521 shares at a weighted average price of $74.443. A portion of the sale proceeds was used to pay the option strike price and related taxes. After these transactions, he directly owned 627,722 shares of Westlake Corp common stock, and the reported option position was reduced to zero.
A holder of 40,836 shares of common stock of WLK has filed a notice of proposed sale under Rule 144. The shares are expected to be sold through Morgan Stanley Smith Barney LLC on the NYSE, with an indicated aggregate market value of $3,004,365.77 and an approximate sale date of 12/22/2025. The filing states that these shares were acquired on 12/22/2025 through a stock option exercise for cash. The issuer reports 128,273,220 shares of this class outstanding, which serves as a baseline for the company’s equity.
Westlake Corporation has approved plans to shut several North American chlorovinyl and styrene production facilities, triggering significant restructuring costs. The closures include a PVC plant in Aberdeen, Mississippi with annual capacity of approximately 1 billion pounds of suspension PVC, VCM and diaphragm chlor-alkali units at its Lake Charles, Louisiana complex with capacities of about 910 million pounds of VCM, 825 million pounds of chlorine and 910 million pounds of caustic soda, and a styrene plant there with about 570 million pounds of capacity. Westlake plans to continue supplying customers from seven other North American chlorovinyl facilities.
The company expects total pre-tax costs of approximately $415 million from these shutdowns, consisting of about $357 million of noncash accelerated depreciation, amortization and asset write-off charges, $25 million of employee severance and separation costs, and $33 million of other plant shutdown costs. Operations at the affected facilities are expected to cease in December 2025 and result in a workforce reduction of roughly 295 employees, with most charges recognized in the fourth quarter of 2025 and related cash outflows occurring over several years. Westlake also shared a press release, investor presentation and conference call update tied to its Performance & Essential Materials profitability improvement plan.
Westlake Corp director reports routine equity award vesting and share acquisition. A board member converted 1,339 restricted stock units into 1,339 shares of Westlake common stock on December 10, 2025, shown as an "M" code transaction. The form reports these shares as directly owned after the transaction.
The restricted stock units were originally granted on December 10, 2024 and vested on the first anniversary of the grant. Each unit converts into one share of common stock at an exercise price of $0, reflecting standard director equity compensation rather than an open-market purchase. The derivative position now shows zero restricted stock units remaining after this vesting and settlement.
Westlake Corporation announced the pricing and the expiration/results of its previously announced cash tender offer for any and all of its outstanding 3.600% Senior Notes due 2026. The updates were disclosed via two press releases issued on November 10, 2025 and furnished as Exhibits 99.1 and 99.2.
The tender offer remains subject to the terms and conditions set forth in the Offer to Purchase dated November 4, 2025. The information was furnished under Regulation FD (Item 7.01) and is not deemed filed under the Exchange Act.
Westlake Corporation announced an underwritten public debt offering of $600 million 5.550% senior notes due 2035 and $600 million 6.375% senior notes due 2055, issued off its Form S-3 shelf. The offering is expected to close on November 6, 2025, subject to customary conditions.
The company expects approximately $1.185 billion in net proceeds (after underwriting discounts and commissions). Westlake plans to use the proceeds first to fund a concurrent tender offer for any and all of its 3.600% senior notes due 2026, of which $750 million was outstanding as of September 30, 2025. Any remaining proceeds will fund part of the purchase price for the pending acquisition of the global compounding solutions business of the ACI/Perplastic Group and for general corporate purposes, including working capital. The offering is not contingent on completing the acquisition or the tender offer.
The notes will be issued under Westlake’s existing indenture and a fifteenth supplemental indenture, which include covenants limiting certain secured debt, sale-leasebacks, and specified mergers or asset transfers, subject to significant exceptions.
Westlake Corporation launched a primary debt offering of $1.2 billion in senior unsecured notes, split between $600 million 5.550% notes due November 15, 2035 and $600 million 6.375% notes due November 15, 2055. Interest starts November 6, 2025 and is payable semi‑annually on May 15 and November 15.
The company expects net proceeds of $1.185 billion (before expenses). Westlake intends to use the proceeds to repurchase its 3.600% Senior Notes due 2026 via a concurrent cash tender offer (outstanding principal $750 million as of September 30, 2025), with any remainder for the pending ACI acquisition (estimated €82.5 million) and general corporate purposes. The notes are callable as described, include a 101% change‑of‑control repurchase right, will not be listed, and settle T+2 on or about November 6, 2025.
As of September 30, 2025, on an as‑adjusted basis assuming full tender, total outstanding debt would be approximately $5.186 billion, representing about 34.3% of total capitalization.
Westlake Corporation announced a cash tender offer for any and all of its outstanding 3.600% Senior Notes due 2026, subject to the terms and conditions in an Offer to Purchase dated November 4, 2025.
On the same day, the company also announced its intention to offer senior unsecured notes in an underwritten public offering pursuant to its effective Form S-3 shelf registration. Both announcements were made via press releases furnished as exhibits.
Westlake Corporation launched a primary debt offering of two series of senior unsecured notes under an effective shelf. Final sizes, coupons and maturities will be set at pricing. The notes will be issued in $2,000 minimum denominations and will not be listed on an exchange.
Westlake intends to use the net proceeds to fund a cash tender offer for its 3.600% Senior Notes due 2026, of which $750 million was outstanding as of September 30, 2025. Any remaining proceeds are expected to fund the €82.5 million pending ACI acquisition and for general corporate purposes. The tender offer is expected to expire on November 10, 2025 and is conditioned on completion of this offering; the offering is not contingent on tender completion.
The notes rank equally with Westlake’s other senior unsecured debt and are effectively subordinated to secured debt and subsidiary liabilities. Westlake may redeem the notes at its option as described, and a Change of Control Triggering Event would require a 101% repurchase offer. Settlement will be in book-entry form through DTC, Euroclear and Clearstream.
Westlake Corporation filed an automatic shelf registration on Form S-3 that includes the potential resale of up to 4,500,000 shares of common stock by its principal stockholder, TTWF LP.
Separately, the filing allows Westlake to offer, from time to time after effectiveness, debt securities, preferred stock, common stock, and warrants, with specific terms to be set in future prospectus supplements. Westlake expects to use any primary offering proceeds for general corporate purposes. It will not receive any proceeds from shares sold by the selling stockholder. Westlake’s common stock trades on the NYSE under “WLK.”
TTWF LP is identified as the principal stockholder and, as of October 27, 2025, beneficially owned approximately 72.4% of Westlake’s common stock. The prospectus outlines standard risks, including potential effects of majority control, stock price volatility, and typical senior note ranking considerations for any future debt issued under the indenture.