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EX-99.1

2 ex991_20260331earningsrele.htm

EX-99.1

Document

EXHIBIT 99.1

WESTLAKE CHEMICAL PARTNERS LP

Contact—(713) 585-2900

Investors—Steve Bender

Media—L. Benjamin Ederington

Westlake Chemical Partners LP Announces First Quarter 2026 Results

•Declared quarterly distribution of $0.4714 per unit; 47th consecutive quarterly distribution

HOUSTON--(BUSINESS WIRE)--Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the first quarter of 2026 of $14.2 million, or $0.40 per limited partner unit, which was above first quarter 2025 net income of $4.9 million. Cash flows from operating activities in the first quarter of 2026 were $110.2 million, an increase of $64.4 million compared to first quarter 2025 cash flows from operating activities of $45.8 million, due to higher production and sales volume as the result of the prior year's Petro 1 turnaround. For the three months ended March 31, 2026, MLP distributable cash flow was $17.9 million, an increase of $13.2 million compared to first quarter 2025 MLP distributable cash flow of $4.7 million. The increase in MLP distributable cash flow and associated trailing twelve-month coverage ratio was primarily due to higher production and sales volume and lower maintenance capital expenditures as a result of the prior year's Petro 1 turnaround.

Compared to the fourth quarter of 2025, first quarter 2026 net income attributable to the Partnership of $14.2 million decreased by $0.3 million due to seasonally lower production and sales volume. First quarter 2026 cash flows from operating activities of $110.2 million decreased by $10.2 million due to working capital changes. First quarter 2026 MLP distributable cash flow of $17.9 million decreased by $0.9 million compared to fourth quarter 2025 MLP distributable cash flow of $18.8 million due to lower production and sales volume.

"The Partnership began the year with solid production and sales volume, generating a coverage ratio 1.08x for the first quarter of 2026," said Jean-Marc Gilson, President and Chief Executive Officer. "Late in the first quarter, following the outbreak of the war with Iran and the closure of the Strait of Hormuz, global demand for North American chemicals and polymers accelerated meaningfully. This surge in export demand has driven higher third-party ethylene sales prices, which is benefiting the Partnership's distributable cash flow and coverage ratio."

On May 4, 2026, the Partnership announced that the Board of Directors of Westlake Chemical Partners GP LLC had approved a quarterly distribution for the first quarter of 2026 of $0.4714 per common unit to be payable on June 1, 2026 to unitholders of record as of May 14, 2026, representing the 47th consecutive quarterly distribution to our unitholders. MLP distributable cash flow provided trailing twelve-month coverage that was 1.00x the declared distributions for the first quarter of 2026, which was above the trailing twelve-month coverage ratio of 0.82x at the end of the fourth quarter of 2025. Since our IPO in July of 2014 our cumulative coverage ratio is approximately 1.05x.

OpCo's Ethylene Sales Agreement with Westlake is designed to provide for stable and predictable cash flows. The agreement provides that 95% of OpCo's ethylene production is sold to Westlake for a cash margin of $0.10 per pound, net of operating costs, maintenance capital expenditures and reserves for future turnaround expenditures.

i

The statements in this release and the related teleconference relating to matters that are not historical facts, such as those with respect to the timing and results of our turnaround activities, our outlook for third-party ethylene margins, the impact of the Iran war on global demand for our products, our expectations regarding feedstock and energy costs, the ability to deliver value, returns, predictable cash flows and distributions to unitholders; our relationship with Westlake and the benefits of the ethylene sales agreement, are forward-looking statements. These forward-looking statements are subject to significant risks and uncertainties. Actual results could differ materially, based on factors including, but not limited to: operating difficulties or disruptions; the volume of ethylene that we are able to sell; the price at which we are able to sell ethylene; changes in the price and availability of feedstocks; changes in prevailing economic conditions; actions and commitments of Westlake, including determinations made pursuant to contractual arrangements with Westlake; the effects of legal proceedings; actions of third parties; inclement or hazardous weather conditions; environmental hazards; changes in laws and regulations (or the interpretation thereof); inability to acquire or maintain necessary permits; inability to obtain necessary production equipment or replacement parts; technical difficulties or failures; labor disputes; inability of our customers to tak

wlkp-202602240001604665false00016046652026-02-242026-02-24

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): February 24, 2026

Westlake Chemical Partners LP (Exact name of registrant as specified in its charter)

Delaware001-3656732-0436529 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

2801 Post Oak Boulevard,Suite 60077056 Houston,Texas (Address of principal executive offices)(Zip Code)

Registrant's telephone number, including area code: (713) 585-2900

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 classTrading Symbol(s)Name of each exchange on which registered Common units representing limited partnership interestsWLKPThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in 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 2.02. Results of Operations and Financial Condition. On February 24, 2026, Westlake Chemical Partners LP (the "Partnership") issued a press release announcing its 2025 fourth quarter and full year results. A copy of the press release is furnished with this Current Report as Exhibit 99.1. The information furnished pursuant to this Current Report, including Exhibit 99.1, 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 filing by Westlake Chemical Partners LP under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, unless specifically identified as being incorporated therein. Item 7.01. Regulation FD Disclosure. The Partnership is holding a conference call on February 24, 2026 to discuss its 2025 fourth quarter and full year results. Information about the call can be found in the press release furnished with this Current Report as Exhibit 99.1. Item 9.01. Financial Statements and Exhibits. (d) Exhibits The following exhibit is furnished herewith: 99.1    Press release issued on February 24, 2026. 104    The cover page from this Current Report on Form 8-K, 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 CHEMICAL PARTNERS LP

By: Westlake Chemical Partners GP LLC Date:February 24, 2026By:/S/ JEAN-MARC GILSON

Jean-Marc Gilson

President, Chief Executive Officer and Director