# EDGAR Filing Document

**Accession Number:** 0001262823
**File Stem:** 0001193125-25-263753
**Filing Date:** 2025-11
**Character Count:** 20859
**Document Hash:** 3a16da820ff8dd87b9b37c466c56e90d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-263753.hdr.sgml**: 20251104

**ACCESSION NUMBER**: 0001193125-25-263753

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 17

**CONFORMED PERIOD OF REPORT**: 20251104

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251104

**DATE AS OF CHANGE**: 20251104

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WESTLAKE CORP
- **CENTRAL INDEX KEY:** 0001262823
- **STANDARD INDUSTRIAL CLASSIFICATION:** INDUSTRIAL ORGANIC CHEMICALS [2860]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 760346924
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32260
- **FILM NUMBER:** 251446888

**BUSINESS ADDRESS:**
- **STREET 1:** 2801 POST OAK BLVD
- **STREET 2:** SUITE 600
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77056
- **BUSINESS PHONE:** 713-960-9111

**MAIL ADDRESS:**
- **STREET 1:** 2801 POST OAK BLVD
- **STREET 2:** SUITE 600
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77056

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WESTLAKE CHEMICAL CORP
- **DATE OF NAME CHANGE:** 20030908

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (date of earliest event reported): November 4, 2025

## Westlake Corporation

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-32260** | **76-0346924** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer**<br> **Identification No.)** |
| **2801 Post Oak Boulevard, Suite 600**<br> **Houston, Texas** |  | **77056** |
| **(Address of principal executive offices)** |  | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (713) 960-9111
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br> **Symbol(s)** | **Name of each exchange**<br> **on which registered** |
| Common Stock | WLK | The New York Stock Exchange |
| 1.625% Senior Notes due 2029 | WLK 29 | The New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 7.01** | **Regulation FD Disclosure**  |

---

#### Tender Offer
On November 4, 2025, Westlake Corporation (the "Company") issued a press release announcing the commencement of a cash tender offer (the "Tender Offer") for any and all of its outstanding 3.600% Senior Notes due 2026. The Tender Offer is subject to the terms and conditions set forth in the Offer to Purchase, dated November 4, 2025. A copy of the press release is attached as Exhibit 99.1 to this report and is incorporated by reference herein.

#### Senior Notes Offering
On November 4, 2025 the Company issued a press release announcing its intention to offer senior unsecured notes (the "Notes") in an underwritten public offering pursuant to the Company's registration statement on Form S-3 (File No. 333-291208) (the "Notes Offering"). A copy of the press release is attached as Exhibit 99.2 to this report and is incorporated herein by reference.

The information furnished pursuant to this Item 7.01, including Exhibits 99.1 and 99.2, shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and will not be incorporated by reference into any registration statement filed by the Company under the Securities Act unless specifically identified as being incorporated therein.

This Current Report on Form 8-K does not constitute an offer to purchase securities or a solicitation of an offer to sell any securities or an offer to sell or the solicitation of an offer to purchase any securities nor does it constitute an offer or solicitation in any jurisdiction in which such offer or solicitation is unlawful.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits

---

| | |
|:---|:---|
| **Exhibit<br>Number** | **Description** |
| 99.1 | [Press Release issued by Westlake Corporation on November 4, 2025 announcing commencement of the Tender Offer.](d30957dex991.htm) |
| 99.2 | [Press Release issued by Westlake Corporation on November 4, 2025 announcing commencement of the Notes Offering.](d30957dex992.htm) |
| 104 | Cover Page Interactive Data File, formatted in Inline XBRL. |

---

------

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **WESTLAKE CORPORATION** | **WESTLAKE CORPORATION** |
| Date: November 4, 2025 | By: | /s/ L. Benjamin Ederington |
|  |  | **L. Benjamin Ederington** |
|  |  | **Executive Vice President, Legal and External Affairs** |

---

## Exhibit 99.1

**Exhibit 99.1**![LOGO](g30957g1104002735741.jpg)

**Westlake Announces Cash Tender Offer** 

**HOUSTON, November 4, 2025 —** Westlake Corporation (NYSE: WLK) ("Westlake") announced today the commencement of a cash tender offer to purchase (the "Offer") any and all of the outstanding 3.600% Senior Notes due 2026 (the "Notes") as set forth in the table below.

The tender offer is being made solely pursuant to the terms and conditions set forth in an Offer to Purchase, dated November 4, 2025 (the "Offer to Purchase"). Holders of the Notes are urged to carefully read the Offer to Purchase before making any decision with respect to the tender offer. The tender offer is not conditioned on any minimum amount of the Notes being tendered. Subject to applicable law, Westlake may amend, extend or terminate the tender offer in its sole discretion. Capitalized terms used but not defined in this announcement have the meanings given to them in the Offer to Purchase.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Series of Notes** | **CUSIP Numbers <sup>(1)</sup>** | **Aggregate<br>Principal Amount<br>Outstanding** | **U.S. Treasury<br>Reference**<br>**Security <sup>(2)</sup>** | **Bloomberg<br>Reference Page <sup>(2)</sup>** | **Fixed<br>Spread <sup>(3)</sup>** |
|  3.600% Senior Notes due 2026 | 960413AT9 (Registered)<br> 960413AH5 (Rule 144A)<br> U96060AC9 (Reg. S) | $750000000 | 4.375% UST due<br>8/15/2026 | FIT3 | 35 bps |

---

(1) No representation is made as to the correctness or accuracy of the CUSIP numbers listed in this press release.
Such information is provided solely for the convenience of holders of the Notes.

(2) The consideration (the "Consideration") payable per $1,000 principal amount of Notes validly
tendered and accepted for purchase will be determined in the manner described in the Offer to Purchase by reference to the fixed spread specified in the table above, plus the yield to maturity of the U.S. Treasury Reference Security based on the bid-side price of the U.S. Treasury Reference Security specified above at 2:00 p.m., New York City time, on November 10, 2025 (such date as it may be extended by Westlake, the "Price Determination
Date"). The calculation of the Consideration may be performed to either the maturity date or the par call date for the Notes, as applicable, in accordance with standard market practice. The Consideration does not include accrued interest,
which will be paid on the Notes accepted for purchase by Westlake as described herein.

(3) In addition to the Consideration, holders of Notes accepted for purchase pursuant to the tender offer,
including Notes accepted pursuant to the guaranteed delivery procedures described in the Offer to Purchase (the "Guaranteed Delivery Procedures"), will also receive accrued interest to, but not including, the Settlement date (as defined
below).

The tender offer will expire at 5:00 p.m., New York City time, on November 10, 2025, unless extended or terminated by Westlake (such time and date, as the same may be extended or terminated by Westlake in its sole discretion, subject to applicable law, the "Expiration Date"). Tendered Notes may be withdrawn at or prior to the Expiration Date by following the procedures in the Offer to Purchase, but may not thereafter be validly withdrawn, unless otherwise required by applicable law.

------

Holders of Notes must validly tender and not validly withdraw their Notes, or submit a Notice of Guaranteed Delivery and comply with the related procedures, prior to the Expiration Date in order to be eligible to receive the Consideration. Accrued and unpaid interest will be paid on all Notes validly tendered and accepted for purchase, including pursuant to the Guaranteed Delivery Procedures, from the last interest payment date up to, but not including, the settlement date (the "Settlement Date"), which is expected to be on or about November 12, 2025. On the Price Determination Date, unless extended, Westlake will issue a press release specifying, among other things, the Consideration for the Notes validly tendered and accepted. Westlake expects to pay the Consideration plus accrued interest for all Notes validly tendered and accepted for purchase (other than Notes tendered pursuant to the Guaranteed Delivery Procedures) on the Settlement Date. For holders of Notes who deliver a Notice of Guaranteed Delivery and all other required documentation at or prior to the Expiration Date, upon the terms and subject to the conditions set forth in the Offer to Purchase (including the Financing Condition and the General Conditions), the deadline to validly tender their Notes using the Guaranteed Delivery Procedures will be the second business day after the Expiration Date and is expected to be 5:00 p.m., New York City time, on November 13, 2025. Westlake expects to pay the Consideration plus accrued interest for all Notes validly tendered and accepted for purchase pursuant to the Guaranteed Delivery Procedures on or about November 14, 2025, the third business day after the Expiration Date.

The purpose of the Offer is to extend the maturity of Westlake's outstanding indebtedness. Westlake intends to fund the purchase of the Notes pursuant to the Offer with the net proceeds from a concurrent senior notes offering, and the Offer is conditioned upon the successful completion of such notes offering.

Additionally, Westlake and/or its affiliates may from time to time, after the consummation or termination of the Offer, purchase additional Notes in the open market, in privately negotiated transactions, through tender offers, exchange offers or otherwise or Westlake may redeem Notes pursuant to their terms. There can be no assurance as to which, if any, of these alternatives (or combinations thereof) Westlake and/or its affiliates may choose to pursue in the future. This news release does not constitute a notice of redemption under the provisions of the indenture governing the Notes.

Westlake has retained J.P. Morgan Securities LLC and Wells Fargo Securities, LLC to act as the dealer managers and Global Bondholder Services Corporation to act as the depositary and information agent for the tender offer. For additional information regarding the terms of the tender offer, please contact J.P. Morgan Securities LLC at +1 (866) 834-4666 (toll-free) or +1 (212) 834-7489 (collect), or Wells Fargo Securities, LLC at +1 (866) 309-6316 (toll-free) or +1 (704) 410-4759 (collect). Requests for copies of the Offer to Purchase and questions regarding the tendering of Notes may be directed to Global Bondholder Services Corporation at (212) 430-3774 (for banks and brokers) or (855) 654-2015 (all others, toll-free) or email contact@gbsc-usa.com. The Offer to Purchase, and the related Notice of Guaranteed Delivery can be accessed at the following link: *<u>https://www.gbsc-usa.com/westlake</u>.*

None of Westlake, the dealer managers, the depositary and information agent or the trustee (nor any director, officer, employee, agent or affiliate of any such person) makes any recommendation whether holders of Notes should tender or refrain from tendering Notes in the Offer, and no one has been authorized by any of them to make such a recommendation. Holders of Notes must make their own decisions as to whether to tender their Notes and, if so, the principal amount of the Notes to tender.

------

This press release is for informational purposes only and does not constitute an offer to sell, or a solicitation of an offer to buy, any security. No offer, solicitation or sale will be made in any jurisdiction in which such an offer, solicitation or sale would be unlawful. The Offer is only being made pursuant to the Offer to Purchase. Holders of the Notes are urged to carefully read the Offer to Purchase before making any decision with respect to the Offer.

**About Westlake** 

Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, with operations in Asia, Europe and North America, we provide the building blocks for vital solutions — from housing and construction, to packaging and healthcare, to automotive and consumer goods.

**Contacts** 

*Media Inquiries*: Ben Ederington, 713-960-9111

*Investor Inquiries*: Steve Bender, 713-960-9111

**Forward-Looking Statements** 

The statements in this press release that are not historical facts, such as statements regarding the expected timing of the Offer, Westlake's ability to complete the Offer, other terms of the Offer, including the General Conditions and Financing Condition, and the successful completion of the concurrent senior notes offering, are forward-looking statements that are based on current expectations. Although Westlake believes that its expectations are based on reasonable assumptions, it can give no assurance that these expectations will prove correct. Important factors that could cause actual results to differ materially from those in the forward-looking statements include results of operations, market conditions, capital needs and uses and other risks and uncertainties that are beyond Westlake's control, including those described in the Offer to Purchase, Westlake's Annual Report on Form 10-K for the fiscal year ended December 31, 2024, Westlake's Quarterly Reports on Form 10-Q for the quarterly periods ended March 31, 2025, June 30, 2025 and September 30, 2025 and its other filings with the SEC. Forward-looking statements, like all statements in this press release, speak only as of the date of this press release (unless another date is indicated). Westlake does not undertake any obligation to publicly update any forward-looking statements, whether as a result of new information, future events, or otherwise.

## Exhibit 99.2

**Exhibit 99.2**![LOGO](g30957g1103112355768.jpg)

**Westlake Announces Proposed Offering of Senior Notes** 

**HOUSTON, November 4, 2025 —** Westlake Corporation (NYSE: WLK) ("Westlake") announced today the commencement of an underwritten public offering, subject to market and other conditions, of senior unsecured notes (the "Notes") under its existing shelf registration statement.

The timing of pricing and terms of the Notes are subject to market conditions and other factors. Westlake intends to use the net proceeds from the proposed public offering of the Notes to fund the repurchase of its outstanding 3.600% Senior Notes due 2026 (the "2026 Senior Notes") pursuant to a concurrent cash tender offer (the "Tender Offer") for any and all of the 2026 Senior Notes. Westlake anticipates using any remaining net proceeds to fund the purchase price of its pending acquisition of the global compounding solutions businesses of the ACI/Perplastic Group (the "ACI Acquisition") and for general corporate purposes, including working capital management. The offering of the Notes is not contingent upon the successful completion of the Tender Offer or the consummation of the ACI Acquisition.

The Notes are being offered and will be sold only pursuant to an effective shelf registration statement that was previously filed with the Securities and Exchange Commission ("SEC"). This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities (including the Notes), nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such state or jurisdiction. The offering of the Notes is being made only by means of a prospectus and related prospectus supplement meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

This press release shall not constitute an offer to purchase or a solicitation of an offer to sell any of the 2026 Senior Notes. The Tender Offer is being made only by and pursuant to, and on the terms and conditions set forth in, the Offer to Purchase dated November 4, 2025.

BofA Securities, Inc., Deutsche Bank Securities Inc., J.P. Morgan Securities LLC and Wells Fargo Securities, LLC are acting as joint book-running managers for the offering of the Notes. A copy of the preliminary prospectus supplement and accompanying base prospectus relating to the offering of the Notes may be obtained for free by visiting EDGAR on the SEC website at *www.sec.gov* or by making a request to: BofA Securities, Inc. at 1-800-294-1322; Deutsche Bank Securities Inc. at 1-800-503-4611; J.P. Morgan Securities LLC collect at 1-212-834-4533; or Wells Fargo Securities, LLC at 1-800-645-3751.

**About Westlake** 

Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, with operations in Asia, Europe and North America, Westlake provides the building blocks for vital solutions — from housing and construction, to packaging and healthcare, to automotive and consumer goods.

------

**Contacts** 

*Media Inquiries*: Ben Ederington, 713-960-9111;

*Investor Inquiries*: Steve Bender, 713-960-9111

**Forward-Looking Statements** 

The statements in this press release that are not historical facts, such as statements regarding the proposed public offering of the Notes and the use of proceeds therefrom and other matters relating to the proposed public offering, are forward-looking statements that are based on current expectations. Although Westlake believes that its expectations are based on reasonable assumptions, it can give no assurance that these expectations will prove correct. Important factors that could cause actual results to differ materially from those in the forward-looking statements include results of operations, market conditions, capital needs and uses and other risks and uncertainties that are beyond Westlake's control, including those described in the preliminary prospectus supplement and accompanying base prospectus relating to the offering of the Notes, Westlake's Annual Report on Form 10-K for the fiscal year ended December 31, 2024, Westlake's Quarterly Reports on Form 10-Q for the quarterly periods ended March 31, 2025, June 30, 2025 and September 30, 2025 and its other filings with the SEC. Forward-looking statements, like all statements in this press release, speak only as of the date of this press release (unless another date is indicated). Westlake does not undertake any obligation to publicly update any forward-looking statements, whether as a result of new information, future events, or otherwise.