• Declared quarterly distribution of $0.4714 per unit; 44th consecutive quarterly distribution

Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the second quarter of 2025 of $14.6 million, or $0.41 per limited partner unit, which was in line with second quarter 2024 net income of $14.4 million. Cash flows from operating activities in the second quarter of 2025 were $9.1 million, a decrease of $112.8 million compared to second quarter 2024 cash flows from operating activities of $121.9 million. For the three months ended June 30, 2025, MLP distributable cash flow was $15.0 million, a decrease of $2.1 million compared to second quarter 2024 MLP distributable cash flow of $17.1 million. The decrease in MLP distributable cash flow and associated trailing twelve-month coverage ratio was primarily due to higher maintenance capital expenditures as a result of the Petro 1 turnaround.

Compared to the first quarter of 2025, second quarter 2025 net income attributable to the Partnership of $14.6 million increased by $9.7 million due to higher production and sales volume as a result of fewer production days impacted by the Petro 1 turnaround. Second quarter 2025 cash flows from operating activities of $9.1 million decreased by $36.7 million compared to first quarter 2025 cash flows from operating activities of $45.8 million due to the timing of cash payments related to the Petro 1 turnaround. Second quarter 2025 MLP distributable cash flow of $15.0 million increased by $10.3 million compared to first quarter 2025 MLP distributable cash flow of $4.7 million, due to higher production and sales volume as a result of fewer production days impacted by the Petro 1 turnaround.

Second quarter 2025 consolidated net income, including OpCo's earnings, of $85.8 million increased from first quarter 2025 consolidated net income of $42.3 million. During the second quarter of 2025, OpCo benefitted from the stability of its sales agreement with Westlake Corporation that provides a fixed margin on OpCo's annual ethylene production plan. As a result of this agreement, OpCo's net income benefitted by $13.6 million to offset lower forecasted annual production volume resulting from the extension of the Petro 1 turnaround into April.

"The Partnership's second quarter financial results improved significantly from the first quarter of 2025 due to higher production and sales volume at our Petro 1 facility as a result of fewer production days lost to the turnaround that began at the end of January and lasted until early April. While there were some lingering impacts to distributable cash flow in the second quarter from the extension of the turnaround into April, primarily in the form of elevated maintenance capital expenditures, this was not unexpected and should not re-occur at such a high level in future quarters," said Jean-Marc Gilson, President and Chief Executive Officer. "Looking ahead, we expect distributable cash flow and the associated coverage ratio to solidly improve in the second half of 2025 back towards our strong historical levels now that the Petro 1 turnaround has been completed."

On July 30, 2025, the Partnership announced that the Board of Directors of Westlake Chemical Partners GP LLC had approved a quarterly distribution for the second quarter of 2025 of $0.4714 per common unit to be payable on August 27, 2025 to unitholders of record as of August 12, 2025, representing the 44th consecutive quarterly distribution to our unitholders. MLP distributable cash flow provided trailing twelve-month coverage that was 0.79x the declared distributions for the second quarter of 2025, which was below the trailing twelve-month coverage ratio of 0.82x at the end of the first quarter of 2025 due to the planned Petro 1 turnaround. 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.

The statements in this release and the related teleconference relating to matters that are not historical facts, such as those with respect to timing and success of future turnarounds, our expectations regarding the amount and timing of future capital expenditures, the ability to deliver value, returns, predictable cash flows and distributions to unitholders, the expectation that distributable cash flow and the associated coverage ratio will improve in the second half of 2025, and the nature and stability of the sales agreement with Westlake and the margin under that 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, pandemic infectious diseases and the response thereto; operating disruptions, including delays in turnaround activities; 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 the renewal or renegotiation of, or determinations made pursuant to, our contractual arrangements with Westlake; 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 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, 2024, which was filed with the SEC in March 2025, and the Partnership's Quarterly Report on Form 10-Q for the quarter ended March 31, 2025, which was filed with the SEC in May 2025.

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, coverage ratio 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 operations, 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, coverage ratio 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, coverage ratio 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' second quarter 2025 results will be held Tuesday, August 5th, 2025 at 1:00 PM Eastern Time (12:00 PM Central Time). To access the conference call, please register at: https://register-conf.media-server.com/register/BIf0b548fd1a0f4090a6412d4c570773b1. 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/2tzqbx2j and the earnings release can be obtained via the Partnership web page at: https://investors.wlkpartners.com/corporate-profile/default.aspx.

WESTLAKE CHEMICAL PARTNERS LP ("WESTLAKE PARTNERS")
CONSOLIDATED STATEMENTS OF OPERATIONS
(Unaudited)

Three Months Ended June 30,

Six Months Ended June 30,

2025

2024

2025

2024

(In thousands of dollars, except per unit data)

Revenue

Net sales—Westlake Corporation ("Westlake")

$

269,076

$

239,527

$

459,857

$

474,736

Net co-products, ethylene and other sales—third parties

28,043

44,641

74,891

94,105

Total net sales

297,119

284,168

534,748

568,841

Cost of sales

199,587

182,936

383,135

365,429

Gross profit

97,532

101,232

151,613

203,412

Selling, general and administrative expenses

6,300

7,605

13,774

14,682

Income from operations

91,232

93,627

137,839

188,730

Other income (expense)

Interest expense—Westlake

(5,907

)

(6,651

)

(11,444

)

(13,232

)

Other income, net

675

1,257

2,021

2,591

Income before income taxes

86,000

88,233

128,416

178,089

Provision for income taxes

205

207

312

417

Net income

85,795

88,026

128,104

177,672

Less: Net income attributable to noncontrolling interest in Westlake Chemical OpCo LP ("OpCo")

71,237

73,599

108,598

148,412

Net income attributable to Westlake Partners

$

14,558

$

14,427

$

19,506

$

29,260

Net income per limited partner unit attributable to Westlake Partners (basic and diluted)

Common units

$

0.41

$

0.41

$

0.55

$

0.83

Distributions declared per unit

$

0.4714

$

0.4714

$

0.9428

$

0.9428

MLP distributable cash flow

$

15,007

$

17,135

$

19,721

$

34,027

Distributions declared

Limited partner units—publicly and privately held

$

9,955

$

9,951

$

19,909

$

19,901

Limited partner units—Westlake

6,657

6,657

13,314

13,314

Total distributions declared

$

16,612

$

16,608

$

33,223

$

33,215

EBITDA

$

124,391

$

123,199

$

199,412

$

247,630

WESTLAKE CHEMICAL PARTNERS LP
CONDENSED CONSOLIDATED BALANCE SHEETS
(Unaudited)

June 30,
2025

December 31,
2024

(In thousands of dollars)

ASSETS

Current assets

Cash and cash equivalents

$

36,579

$

58,316

Receivable under the Investment Management Agreement—Westlake

43,924

134,557

Accounts receivable, net—Westlake

59,919

31,975

Accounts receivable, net—third parties

12,817

11,576

Inventories

3,261

4,058

Prepaid expenses and other current assets

24

444

Total current assets

156,524

240,926

Property, plant and equipment, net

902,062

903,588

Other assets, net

248,601

143,442

Total assets

$

1,307,187

$

1,287,956

LIABILITIES AND EQUITY

Current liabilities (accounts payable and accrued and other liabilities)

$

72,906

$

55,372

Long-term debt payable to Westlake

399,674

399,674

Other liabilities

3,442

3,596

Total liabilities

476,022

458,642

Common unitholders—publicly and privately held

463,109

471,328

Common unitholder—Westlake

41,876

47,373

General partner—Westlake

(242,572

)

(242,572

)

Total Westlake Partners partners' capital

262,413

276,129

Noncontrolling interest in OpCo

568,752

553,185

Total equity

831,165

829,314

Total liabilities and equity

$

1,307,187

$

1,287,956

WESTLAKE CHEMICAL PARTNERS LP
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)

Six Months Ended June 30,

2025

2024

(In thousands of dollars)

Cash flows from operating activities

Net income

$

128,104

$

177,672

Adjustments to reconcile net income to net cash provided by operating activities

Depreciation and amortization

59,552

56,309

Net loss on disposition and other

524

1,870

Other balance sheet changes

(133,328

)

(9,390

)

Net cash provided by operating activities

54,852

226,461

Cash flows from investing activities

Additions to property, plant and equipment

(40,336

)

(19,951

)

Maturities of investments with Westlake under the Investment Management Agreement

90,000

Net cash provided by (used for) investing activities

49,664

(19,951

)

Cash flows from financing activities

Proceeds from debt payable to Westlake

95,000

108,000

Repayment of debt payable to Westlake

(95,000

)

(108,000

)

Distributions to noncontrolling interest retained in OpCo by Westlake

(93,031

)

(165,916

)

Distributions to unitholders

(33,222

)

(33,214

)

Net cash used for financing activities

(126,253

)

(199,130

)

Net increase (decrease) in cash and cash equivalents

(21,737

)

7,380

Cash and cash equivalents at beginning of period

58,316

58,619

Cash and cash equivalents at end of period

$

36,579

$

65,999

WESTLAKE CHEMICAL PARTNERS LP
RECONCILIATION OF MLP DISTRIBUTABLE CASH FLOW TO NET INCOME
AND NET CASH PROVIDED BY OPERATING ACTIVITIES
(Unaudited)

Three Months Ended March 31,

Three Months Ended June 30,

Six Months Ended June 30,

2025

2025

2024

2025

2024

(In thousands of dollars)

Net cash provided by operating activities

$

45,781

$

9,071

$

121,896

$

54,852

$

226,461

Changes in operating assets and liabilities and other

(3,472

)

76,724

(33,870

)

73,252

(48,789

)

Net income

42,309

85,795

88,026

128,104

177,672

Add:

Depreciation, amortization and disposition of property, plant and equipment

27,171

32,872

29,869

60,043

58,134

Less:

Contribution to turnaround reserves

(7,622

)

(10,396

)

(8,672

)

(18,018

)

(20,148

)

Maintenance capital expenditures

(20,577

)

(20,506

)

(9,306

)

(41,083

)

(17,055

)

Distributable cash flow attributable to noncontrolling interest in OpCo

(36,567

)

(72,758

)

(82,782

)

(109,325

)

(164,576

)

MLP distributable cash flow

$

4,714

$

15,007

$

17,135

$

19,721

$

34,027

WESTLAKE CHEMICAL PARTNERS LP
RECONCILIATION OF EBITDA TO NET INCOME, INCOME FROM OPERATIONS AND NET CASH
PROVIDED BY OPERATING ACTIVITIES
(Unaudited)

Three Months Ended March 31,

Three Months Ended June 30,

Six Months Ended June 30,

2025

2025

2024

2025

2024

(In thousands of dollars)

Net cash provided by operating
activities

$

45,781

$

9,071

$

121,896

$

54,852

$

226,461

Changes in operating assets and liabilities and other

(3,472

)

76,724

(33,870

)

73,252

(48,789

)

Net income

42,309

85,795

88,026

128,104

177,672

Less:

Other income, net

1,346

675

1,257

2,021

2,591

Interest expense—Westlake

(5,537

)

(5,907

)

(6,651

)

(11,444

)

(13,232

)

Provision for income taxes

(107

)

(205

)

(207

)

(312

)

(417

)

Income from operations

46,607

91,232

93,627

137,839

188,730

Add:

Depreciation and amortization

27,068

32,484

28,315

59,552

56,309

Other income, net

1,346

675

1,257

2,021

2,591

EBITDA

$

75,021

$

124,391

$

123,199

$

199,412

$

247,630

Contact—(713) 585-2900
Investors—Steve Bender
Media—L. Benjamin Ederington

Source: Westlake Chemical Partners