• Declared quarterly distribution of $0.4714 per unit; 34^th consecutive quarterly distribution

Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the fourth quarter of 2022 of $16.8 million, or $0.48 per limited partner unit, a decrease of $12.7 million compared to fourth quarter 2021 net income of $29.5 million. Net income in the fourth quarter of 2021 benefitted from a $32 million buyer deficiency fee resulting from an unplanned outage related to the Petro 2 turnaround at Westlake Chemical OpCo, LP ("OpCo"). The decrease in net income in the fourth quarter of 2022 when compared to the prior-year period was a result of a lower buyer deficiency fee of $10 million recorded in the period as well as higher interest expense, partially offset by higher production at OpCo. Cash flows from operating activities in the fourth quarter of 2022 were $122.6 million, an increase of $100.7 million compared to fourth quarter 2021 cash flows from operating activities of $21.9 million, due to higher production at OpCo as well as cash flows from operations in the fourth quarter of 2021 being impacted by expenditures related to OpCo's Petro 2 turnaround. For the three months ended December 31, 2022, MLP distributable cash flow was $20.3 million, an increase of $5.0 million compared to fourth quarter 2021 MLP distributable cash flow of $15.3 million. The increase in MLP distributable cash flow and associated trailing twelve-month coverage ratio was primarily attributable to higher production and lower maintenance capital spending.

Fourth quarter 2022 net income attributable to the Partnership of $16.8 million increased by $2.0 million compared to third quarter 2022 net income of $14.8 million, primarily due to higher production volume, partially offset by higher interest expense. Fourth quarter 2022 cash flows from operating activities of $122.6 million increased by $7.1 million compared to third quarter 2022 cash flows from operating activities of $115.5 million due to higher production. Fourth quarter 2022 MLP distributable cash flow of $20.3 million increased by $3.6 million compared to third quarter 2022 MLP distributable cash flow of $16.7 million, primarily due to lower maintenance capital expenditures.

For the full year 2022, net income attributable to the Partnership of $64.2 million, or $1.82 per limited partner unit, decreased by $18.3 million compared to full year of 2021 net income attributable to the Partnership of $82.5 million. The decrease in net income attributable to the Partnership was primarily due to lower third-party sales margins, higher interest expense, and a lower buyer deficiency fee than in the prior-year period. Cash flows from operating activities for the full year of 2022 were $463.7 million, an increase of $55.3 million compared to the full year of 2021 cash flows from operating activities of $408.4 million. This increase in cash flows from operating activities was primarily due to higher production at OpCo, significantly lower turnaround expenditures, and the receipt of a prior-year receivable from Westlake. For the year ended December 31, 2022, MLP distributable cash flow was $75.9 million, an increase of $5.8 million compared to MLP distributable cash flow of $70.1 million for the year ended December 31, 2021.

"2022 presented its share of challenges including decades-high inflation, tighter monetary policy, and the highest feedstock and energy costs for U.S. ethylene producers since 2011. While each year brings new challenges, the Partnership's financial performance in 2022, supported by our sales agreement with Westlake, once again demonstrated the resiliency and consistency of its earnings and cash flows. This consistent cash flow enabled us to declare our 34th consecutive quarterly distribution payment and improve our twelve-month coverage ratio to 1.14x in 2022," said Albert Chao, President and Chief Executive Officer. "2023 will likely bring new challenges, such as the current low third-party ethylene sales margins and relatively high interest rates; however, despite these headwinds, the insulative attributes of the agreement with Westlake give us confidence in another year of solid performance and cash flows."

On January 23, 2023, the Partnership announced that the Board of Directors of Westlake Chemical Partners GP LLC had approved a quarterly distribution for the fourth quarter of 2022 of $0.4714 per unit to be payable on February 16, 2023 to unitholders of record as of February 2, 2023, representing the 34th consecutive quarterly distribution to our unitholders. MLP distributable cash flow provided trailing twelve-month coverage of 1.14x the declared distributions for the fourth quarter of 2022, which was an increase from the trailing twelve-month coverage ratio of 1.07x at the end of the third quarter of 2022.

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.

The statements in this release and the related teleconference relating to matters that are not historical facts, such as those with respect to the ability to deliver value, returns, predictable cash flows and distributions to unitholders, the expectation that strong distributions will continue, and the nature of the sales agreement with Westlake, 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, the COVID-19 pandemic and the response thereto; operating difficulties; 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 Corporation; actions of third parties; inclement or hazardous weather conditions, including flooding, and the physical impacts of climate change; 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; difficulty collecting receivables; inability of our customers to take delivery; fires, explosions or other industrial accidents; our ability to borrow funds and access capital markets; and other risk factors. For more detailed information about the factors that could cause actual results to differ materially, please refer to the Partnership's Annual Report on Form 10-K for the year ended December 31, 2021, which was filed with the SEC in March 2022, and Quarterly Report on Form 10-Q for the quarter ended September 30, 2022, which was filed with the SEC in November 2022.

This release is intended to be a qualified notice under Treasury Regulation Section 1.1446-4(b). Brokers and nominees should treat one hundred percent (100.0%) of the Partnership's distributions to non-U.S. investors as being attributable to income that is effectively connected with a United States trade or business. Accordingly, the Partnership's distributions to non-U.S. investors are subject to federal income tax withholding at the highest applicable effective tax rate.

Use of Non-GAAP Financial Measures

This release makes reference to certain "non-GAAP" financial measures, such as MLP distributable cash flow and EBITDA. For this purpose, a non-GAAP financial measure is generally defined by the Securities and Exchange Commission ("SEC") as a numerical measure of a registrant's historical or future financial performance, financial position or cash flows that (1) excludes amounts, or is subject to adjustments that have the effect of excluding amounts, that are included in the most directly comparable measure calculated and presented in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") in the statement of income, balance sheet or statement of cash flows (or equivalent statements) of the registrant; or (2) includes amounts, or is subject to adjustments that have the effect of including amounts, that are excluded from the most directly comparable measure so calculated and presented. We report our financial results in accordance with U.S. GAAP, but believe that certain non-GAAP financial measures, such as MLP distributable cash flow and EBITDA, provide useful supplemental information to investors regarding the underlying business trends and performance of our ongoing operations and are useful for period-over-period comparisons of such operations. These non-GAAP financial measures should be considered as a supplement to, and not as a substitute for, or superior to, the financial measures prepared in accordance with U.S. GAAP. We define MLP distributable cash flow as distributable cash flow less distributable cash flow attributable to Westlake Corporation's noncontrolling interest in OpCo and distributions attributable to the incentive distribution rights holder. MLP distributable cash flow does not reflect changes in working capital balances. We define EBITDA as net income before interest expense, income taxes, depreciation and amortization. MLP distributable cash flow and EBITDA are non-GAAP supplemental financial measures that management and external users of our consolidated financial statements, such as industry analysts, investors, lenders and rating agencies, may use to assess our operating performance as compared to other publicly traded partnerships, our ability to incur and service debt and fund capital expenditures and the viability of acquisitions and other capital expenditure projects and the returns on investment of various investment opportunities. Reconciliations of MLP distributable cash flow to net income and to net cash provided by operating activities and of EBITDA to net income, income from operations and net cash provided by operating activities can be found in the financial schedules at the end of this press release.

Westlake Chemical Partners LP

Westlake Chemical Partners is a limited partnership formed by Westlake Corporation to operate, acquire and develop ethylene production facilities and other qualified assets. Headquartered in Houston, the Partnership owns a 22.8% interest in Westlake Chemical OpCo LP. Westlake Chemical OpCo LP's assets consist of three ethylene production facilities in Calvert City, Kentucky, and Lake Charles, Louisiana and an ethylene pipeline. For more information about Westlake Chemical Partners LP, please visit http://www.wlkpartners.com.

Westlake Chemical Partners LP Conference Call Information:

A conference call to discuss Westlake Chemical Partners' fourth quarter 2022 results will be held Tuesday, February 21, 2023 at 1:00 PM Eastern Time (12:00 PM Central Time). To access the conference call, please register at: https://register.vevent.com/register/BI9783ef61b8b547ef9b507fc63dc0f073. A dial-in will be provided upon registration.

The conference call will also be available via webcast at: https://edge.media-server.com/mmc/p/n8a3yw3a and the earnings release can be obtained via the Partnership web page at: https://investors.wlkpartners.com/corporate-profile/default.aspx.

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