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): August 3, 2021

Westlake Chemical Corporation

(Exact name of registrant as specified in its charter)

Delaware	001-32260	76-0346924
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

2801 Post Oak Boulevard,	Suite 600
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 Symbol(s)	Name of each exchange on which registered
Common Stock, $0.01 par value	WLK	The New York Stock Exchange
1.625% Senior Notes due 2029	WLK29	The 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 August 3, 2021, Westlake Chemical Corporation (the "Company") issued a press release announcing its 2021 second quarter 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 registration statement filed by Westlake Chemical Corporation under the Securities Act of 1933, as amended, unless specifically identified as being incorporated therein.

Item 7.01. Regulation FD Disclosure.

The Company is holding a conference call on August 3, 2021 to discuss its 2021 second quarter results. Information about the call can be found in the press release furnished with this Current Report as Exhibit 99.1. In addition, the Company made available an investor presentation regarding its 2021 second quarter results, which is furnished with this Current Report as Exhibit 99.2.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are furnished herewith:

99.1    Press release issued on August 3, 2021.

99.2    Investor Presentation.

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 CORPORATION
Date:	August 3, 2021	By:	/S/ ALBERT CHAO
			Albert Chao President and Chief Executive Officer

EX-99.1

EXHIBIT 99.1

WESTLAKE CHEMICAL CORPORATION

Contact—(713) 960-9111

Investors—Steve Bender

Media—L. Benjamin Ederington

Westlake Chemical Corporation Reports Second Quarter 2021 Results

•Record quarterly net sales of $2.9 billion

•Record quarterly net income of $522 million, excluding one-time tax benefits in a prior quarter

•Record quarterly EBITDA of $932 million

•Announced pending acquisitions of Boral's North American building products businesses and of LASCO Fittings, Inc., which are expected to close in the second half of 2021

HOUSTON--(BUSINESS WIRE)-- Westlake Chemical Corporation (NYSE: WLK) (the "Company" or "Westlake") today reported record net income, excluding one-time tax benefits, attributable to Westlake for the three months ended June 30, 2021 of $522 million, or $4.04 per diluted share, on record net sales of $2,859 million. Net income in the second quarter of 2021 increased by $507 million from second quarter 2020 net income of $15 million, or $0.11 per share, on net sales of $1,709 million. Income from operations for the second quarter of 2021 was a quarterly record of $720 million, and increased by $684 million from income from operations of $36 million for the second quarter of 2020. The increases in net income and income from operations were primarily driven by significantly higher sales prices and margins for most of our major products and higher sales volumes in our Vinyls Segment. The increase in sales prices for PVC resin were driven by the strong demand in North American residential construction and the repair and remodeling markets which also drove demand in our building and construction materials business. Additionally, polyethylene experienced robust strength from packaging and other consumer markets driving higher prices and margins resulting from the rebound in global economic activity following the onset of the COVID-19 pandemic in the first half of 2020.

Second quarter 2021 net income of $522 million, or $4.04 per share, increased by $280 million from first quarter 2021 net income of $242 million, or $1.87 per share. Income from operations of $720 million for the second quarter of 2021 increased by $374 million from income from operations of $346 million for the first quarter of 2021. The increases in net income and income from operations versus the prior quarter were primarily due to higher sales prices and higher margins for all of our major products including PVC resin, polyethylene, caustic soda and our building and construction materials as well as higher sales volumes for PVC resin as operations rebounded following the impacts of the Winter Storm Uri in the first quarter. The increases in sales prices and volumes for our products contributed to higher margins and strong earnings in our building and construction materials business.

For the first six months of 2021, net income of $764 million, or $5.91 per share, increased by $604 million from the first six months of 2020 net income of $160 million, or $1.24 per share. Income from operations of $1,066 million for the first six months of 2021 increased by $894 million from income from operations of $172 million for the first six months of 2020, which was severely impacted by the onset of the global COVID-19 pandemic. The increases in net income and income from operations were primarily due to the global economic recovery, which has driven strong demand and higher sales prices and margins for most of our major products. These increases were partially offset by the impacts to production and sales volumes as a result of Winter Storm Uri in the first quarter of 2021.

On June 20, 2021, Westlake announced that it had entered into a definitive agreement with Boral Industries Inc., a wholly owned subsidiary of Boral Limited, under which Westlake will acquire Boral's North American building products businesses in roofing; siding, trim and shutters; decorative stone; and windows ("Boral North America"). The combination of these businesses with Westlake's leading building products businesses creates a stronger business with significantly increased scale and complementary product offerings, and enhanced growth prospects throughout the North American building products market.

i

On July 6, 2021, North American Pipe Corporation ("NAPCO"), a subsidiary of Westlake, announced that it has entered into a definitive agreement to acquire LASCO Fittings, Inc. ("LASCO"), a leading designer, engineer and manufacturer of injected-molded PVC fittings. The acquisition will add complementary products to NAPCO's existing portfolio of pipe and fittings products, with an emphasis on new products and new markets.

"This is an exciting time for Westlake. In the second quarter, we achieved record quarterly earnings as we continue to benefit from the global economic recovery and expansion that began in the summer of 2020 with strong demand for our products driving higher sales prices and margins," said Albert Chao, President and Chief Executive Officer. "The strong demand we experienced across our product offerings during the quarter illustrates our earnings capability. As global supply chains and manufacturing recover to meet demand, Westlake is well positioned to deliver strong results."

"We continue to invest in our business to drive value and are creating new platforms for continued future growth," continued Mr. Chao. "We recently announced acquisitions totaling approximately $2.4 billion for Boral North America and LASCO, which will set another stage of development and growth for Westlake. We believe in the growing secular strength of the housing, repair and remodeling markets, and these strategic acquisitions will provide new and complementary platforms and long-term growth opportunities for Westlake. Through these acquisitions, we can deliver greater value and convenience to our customers which will create value uplift to our shareholders. We look forward to welcoming the Boral and LASCO employees to the Westlake family."

Net cash provided by operating activities was $617 million for the second quarter of 2021. As of June 30, 2021, cash and cash equivalents were $1,844 million and long-term debt was $3,555 million. Capital expenditures were $129 million for the second quarter of 2021.

Record EBITDA (earnings before interest expense, income taxes, depreciation and amortization) of $932 million for the second quarter of 2021 increased by $696 million compared to second quarter 2020 EBITDA of $236 million. Second quarter 2021 EBITDA increased by $379 million compared to first quarter 2021 EBITDA of $553 million. Record EBITDA of $1,485 million for the first six months of 2021 was $912 million higher than EBITDA for the first six months of 2020 of $573 million. A reconciliation 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.

VINYLS SEGMENT

Record Vinyls income from operations for the second quarter of 2021 of $435 million increased by $415 million from second quarter 2020 income from operations of $20 million. This increase in income from operations versus the prior-year period was primarily due to higher sales prices, margins and sales volumes for PVC resin as well as strong earnings in our building and construction materials business.

Record Vinyls income from operations for the second quarter of 2021 of $435 million increased by $235 million from first quarter 2021 income from operations of $200 million primarily due to higher sales prices and integrated margins for our products, higher sales volumes for PVC resin and strong earnings in our building and construction materials business. The first quarter of 2021 was also negatively impacted by the effects of Winter Storm Uri which severely curtailed production at many of our facilities.

For the first six months of 2021, Vinyls income from operations of $635 million increased by $542 million from income from operations of $93 million for the first six months of 2020. This increase in income from operations versus the prior-year period was primarily due to higher sales prices, volumes and integrated margins for PVC resin. Income from operations for the first half of 2021 saw higher ethylene costs as well as the impacts from Winter Storm Uri, while income from operations for the first half of 2020 was negatively impacted by the onset of the COVID-19 pandemic.

OLEFINS SEGMENT

Record Olefins income from operations for the second quarter of 2021 of $277 million increased by $252 million from second quarter 2020 income from operations of $25 million. This increase in income from operations versus the prior-year period was primarily due to significantly higher sales prices and margins for all of our products, driven by continuing strong global demand with continuing supply constraints, partially offset by lower polyethylene sales volumes.

ii

Record Olefins income from operations of $277 million in the second quarter of 2021 increased by $97 million from first quarter 2021 income from operations of $180 million. This increase in income from operations versus the prior quarter was primarily due to higher sales prices and margins.

For the first six months of 2021, Olefins income from operations of $457 million increased by $370 million from income from operations of $87 million for the first six months of 2020. This increase in income from operations was primarily due to higher sales prices and margins, partially offset by lower polyethylene sales volumes.

Forward-Looking Statements

The statements in this release and the related teleconference relating to matters that are not historical facts, including statements regarding our ability to deliver strong results, continued improvement of our performance in 2021, demand for polyethylene, PVC and downstream business products, the expected results of the pending Boral North American and Lasco acquisitions and whether required regulatory approval for these transactions will be obtained, 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; general economic and business conditions; the cyclical nature of the chemical industry; availability, cost and volatility of raw materials and utilities, including natural gas and natural gas liquids from shale production; the price of crude oil; uncertainties associated with the United States and worldwide economies, including those due to global economic and financial conditions; governmental regulatory actions, including environmental regulation and changes in trade policies; political unrest; industry production capacity and operating rates; the supply/demand balance for Westlake's products; competitive products and pricing pressures; access to capital markets; technological developments; the effect and results of litigation and settlements of litigation; operating interruptions; the timing to consummate the pending acquisitions; the conditions to closing of either pending acquisition may not be satisfied or the closing of either pending acquisition otherwise may not occur; the risk that regulatory clearance is not obtained or is obtained subject to conditions that are not anticipated; the diversion of management time on transaction-related issues; and other risk factors. For more detailed information about the factors that could cause actual results to differ materially, please refer to Westlake's Annual Report on Form 10-K for the year ended December 31, 2020, which was filed with the SEC in February 2021.

Use of Non-GAAP Financial Measures

This release makes reference to certain "non-GAAP" financial measures, such as EBITDA, as defined in Regulation G of the U.S. Securities Exchange Act of 1934, as amended. 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 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. generally accepted accounting principles ("U.S. GAAP"), but believe that certain non-GAAP financial measures, such as EBITDA, provide useful supplemental information to investors regarding the underlying business trends and performance of the Company's 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. A reconciliation 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.

About Westlake:

Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, we provide the building blocks for vital solutions — from building products and infrastructure materials, to packaging and healthcare products, to automotive and consumer goods. For more information, visit the company's web site at www.westlake.com.

iii

Westlake Chemical Corporation Conference Call Information:

A conference call to discuss Westlake Chemical Corporation's second quarter 2021 results will be held Tuesday, August 3, 2021 at 11:00 AM Eastern Time (10:00 AM Central Time). To access the conference call, dial (855) 760-8160 or (704) 288-0624 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 459 47 33.

A replay of the conference call will be available beginning two hours after its conclusion until 11:59 p.m. Eastern Time on August 10, 2021. To hear a replay, dial (855) 859-2056 or (404) 537-3406 for international callers. The replay passcode is 459 47 33.

The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/ri2i4625 and the earnings release can be obtained via the Company's web page at: http://www.westlake.com/investor-relations.

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WESTLAKE CHEMICAL CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(In millions of dollars, except per share data)
Net sales	$	2,859	$	1,709	$	5,216	$	3,641
Cost of sales	1,987		1,540		3,835		3,189
Gross profit	872		169		1,381		452
Selling, general and administrative expenses	125		104		261		224
Amortization of intangibles	27		27		54		54
Restructuring, transaction and integration-related costs	—		2		—		2
Income from operations	720		36		1,066		172
Interest expense	(36)		(40)		(69)		(71)
Other income, net	10		9		22		20
Income before income taxes	694		5		1,019		121
Provision for (benefit from) income taxes	158		(19)		230		(60)
Net income	536		24		789		181
Net income attributable to noncontrolling interests	14		9		25		21
Net income attributable to Westlake Chemical Corporation	$	522	$	15	$	764	$	160
Earnings per common share attributable to Westlake Chemical Corporation:
Basic	$	4.06	$	0.11	$	5.94	$	1.24
Diluted	$	4.04	$	0.11	$	5.91	$	1.24

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WESTLAKE CHEMICAL CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	June 30, 2021		December 31, 2020
	(In millions of dollars)
ASSETS
Current assets
Cash and cash equivalents	$	1,844	$	1,313
Accounts receivable, net	1,549		1,214
Inventories	965		918
Prepaid expenses and other current assets	87		32
Total current assets	4,445		3,477
Property, plant and equipment, net	6,919		6,920
Other assets, net	3,355		3,438
Total assets	$	14,719	$	13,835
LIABILITIES AND EQUITY
Current liabilities (accounts payable and accrued and other liabilities)	$	1,485	$	1,357
Long-term debt, net	3,555		3,566
Other liabilities	2,340		2,334
Total liabilities	7,380		7,257
Total Westlake Chemical Corporation stockholders' equity	6,771		6,043
Noncontrolling interests	568		535
Total equity	7,339		6,578
Total liabilities and equity	$	14,719	$	13,835

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WESTLAKE CHEMICAL CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Six Months Ended June 30,
	2021		2020
	(In millions of dollars)
Cash flows from operating activities
Net income	$	789	$	181
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	397		381
Deferred income taxes	24		96
Net loss on disposition and others	45		26
Other balance sheet changes	(373)		(175)
Net cash provided by operating activities	882		509
Cash flows from investing activities
Additions to property, plant and equipment	(270)		(291)
Return of (additions to) investment from unconsolidated subsidiaries	(9)		39
Other, net	15		(8)
Net cash used for investing activities	(264)		(260)
Cash flows from financing activities
Distributions to noncontrolling interests	(22)		(29)
Dividends paid	(69)		(68)
Net proceeds from debt issuance and drawdown of revolver	4		1,299
Net proceeds from (repayment of) short-term notes payable	5		(14)
Repayment of revolver	—		(1,000)
Repurchase of common stock for treasury	—		(54)
Other, net	10		(3)
Net cash provided by (used for) financing activities	(72)		131
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(4)		—
Net increase in cash, cash equivalents and restricted cash	542		380
Cash, cash equivalents and restricted cash at beginning of period	1,337		750
Cash, cash equivalents and restricted cash at end of period	$	1,879	$	1,130

vii

WESTLAKE CHEMICAL CORPORATION

SEGMENT INFORMATION

(Unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
	(In millions of dollars)
Net external sales
Vinyls	$	2,188	$	1,348	$	4,008	$	2,853
Olefins	671		361		1,208		788
	$	2,859	$	1,709	$	5,216	$	3,641
Income (loss) from operations
Vinyls	$	435	$	20	$	635	$	93
Olefins	277		25		457		87
Corporate and other	8		(9)		(26)		(8)
	$	720	$	36	$	1,066	$	172
Depreciation and amortization
Vinyls	$	163	$	154	$	320	$	307
Olefins	37		35		73		70
Corporate and other	2		2		4		4
	$	202	$	191	$	397	$	381
Other income, net
Vinyls	$	7	$	8	$	17	$	14
Olefins	2		—		2		1
Corporate and other	1		1		3		5
	$	10	$	9	$	22	$	20

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WESTLAKE CHEMICAL CORPORATION

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,
	2021		2021		2020		2021		2020
	(In millions of dollars)
Net cash provided by operating activities	$	265	$	617	$	448	$	882	$	509
Changes in operating assets and liabilities and other	(2)		(67)		(454)		(69)		(232)
Deferred income taxes	(10)		(14)		30		(24)		(96)
Net income	253		536		24		789		181
Less:
Other income, net	12		10		9		22		20
Interest expense	(33)		(36)		(40)		(69)		(71)
Benefit from (provision for) income taxes	(72)		(158)		19		(230)		60
Income from operations	346		720		36		1,066		172
Add:
Depreciation and amortization	195		202		191		397		381
Other income, net	12		10		9		22		20
EBITDA	$	553	$	932	$	236	$	1,485	$	573

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WESTLAKE CHEMICAL CORPORATION

SUPPLEMENTAL INFORMATION

Product Sales Price and Volume Variance by Operating Segments

	Second Quarter 2021 vs. Second Quarter 2020				Second Quarter 2021 vs. First Quarter 2021
	Average Sales Price		Volume		Average Sales Price		Volume
Vinyls	+53.5	%	+9.0	%	+18.2	%	+2.1	%
Olefins	+99.9	%	-13.9	%	+25.5	%	-0.6	%
Company	+63.3	%	+4.1	%	+19.8	%	+1.5	%

Average Quarterly Industry Prices (1)

	Quarter Ended
	June 30, 2020	September 30, 2020	December 31, 2020	March 31, 2021	June 30, 2021
Average domestic prices
Natural gas ($/MMBtu) (2)	1.8	2.0	2.7	2.8	2.9
Ethane (cents/lb) (3)	6.4	7.4	7.1	8.1	8.7
Propane (cents/lb) (4)	9.6	11.9	13.5	21.2	20.7
Ethylene (cents/lb) (5)	11.0	19.3	24.0	45.1	43.0
Polyethylene (cents/lb) (6)	49.0	61.0	67.7	78.0	99.0
Styrene (cents/lb) (7)	48.3	53.8	59.6	76.5	90.5
Caustic soda ($/short ton) (8)	698	697	653	648	755
Chlorine ($/short ton) (9)	175	176	193	234	309
PVC (cents/lb) (10)	66.5	73.3	84.5	92.8	105.0
Average export prices
Polyethylene (cents/lb) (11)	38.5	45.7	53.2	76.3	89.7
Caustic soda ($/short ton) (12)	319	260	219	249	333
PVC (cents/lb) (13)	27.5	38.5	55.4	67.8	77.8

________________

(1)Industry pricing data was obtained through IHS Markit ("IHS"). We have not independently verified the data.

(2)Average Burner Tip contract prices of natural gas over the period.

(3)Average Mont Belvieu spot prices of purity ethane over the period.

(4)Average Mont Belvieu spot prices of non-TET propane over the period.

(5)Average North American spot prices of ethylene over the period.

(6)Average North American Net Transaction prices of polyethylene low density GP-Film grade over the period.

(7)Average North American contract prices of styrene over the period.

(8)Average USGC-CSLi index values for caustic soda over the period. As stated by IHS, "the caustic soda price listing represents the USGC-CSLi values. USGC-CSLi does not reflect contract price discounts, implementation lags, caps or other adjustments factors. Additionally, it is not intended to represent a simple arithmetic average of all market transactions occurring during the month. Rather, the USGC-CSLi is most representative of the month-to-month caustic soda price movement for contract volumes of liquid 50% caustic soda rather than the absolute value of contract prices at a particular point in time. It is intended to serve only as a benchmark."

(9)Average North American contract prices of chlorine over the period.

(10)Average North American contract prices of pipe grade polyvinyl chloride ("PVC") over the period. As stated by IHS, "the contract resin prices posted reflect an "index" or "market" for prices before discounts, rebates, incentives, etc."

(11)Average North American export price for low density polyethylene GP-Film grade over the period.

x

(12)Average North American low spot export prices of caustic soda over the period.

(13)Average North American spot export prices of PVC over the period.

xi

EX-99.2

Second Quarter 2021 Earnings Presentation August 3, 2021

Westlake’s sustainability report can be found at https://www.westlake.com/sustainability Commitment to Corporate Social Responsibility is Formed by Five Longstanding Core Values 2

Advancing Sustainability Participating in Multi-Industry Associations for Environmental Protection Westlake is a proud partner with the following organizations to drive sustainable action to eliminate plastic waste, capture more flexible food packaging waste for recycling and support vinyls’ sustainable impact in the world, along with many other initiatives. Protecting the Environment Westlake has numerous programs designed to promote safe, ethical, environmentally and socially responsible practices including: a worldwide recycling program, operating in an energy efficient manner and reducing water usage and emissions. As discussed in our sustainability report, over a five year period, Westlake has reduced Sulphur Dioxide emissions to almost zero, reduced energy usage per ton of global production and achieved a nearly 30% reduction on CO2 emissions. 3 Developing Green Products Vinnolit, a Westlake company, offers certified climate-friendly caustic soda utilizing renewable energy Guarantees of Origin (GOs). The CO2 footprint of this low-carbon caustic soda introduced to the market under the brand name GreenVin is reduced by more than 30% compared to conventional Vinnolit caustic soda. We are continuing to work to develop additional green products that will drive value while reducing our carbon footprint. We are continuing to develop products that are in line with our sustainability goals while meeting the need for greener products.

Westlake Chemical Second Quarter 2021 Highlights 4 Business Highlights  Westlake achieved record quarterly net income of $522 million, excluding one-time tax benefits, and record EBITDA of $932 million, anchored by strong margins across our product offerings and generated $617 million in operating cash flows  Announced agreement to acquire Boral’s North American building products businesses in roofing; siding, trim and shutters; decorative stone; and windows, transforming our building and construction materials business  Announced agreement to acquire LASCO Fittings, Inc., a leading manufacturer of injected-molded PVC fittings Business Hi lights Industry Outlook  Continued strength in PVC driven by globally strong demand in new construction, repairs and remodeling activity  Consumer demand remains robust for essential everyday packaged products driving value in polyethylene Industry Outlook $522 MM $4.04 $1.8 B $932 MM 1 (1) Reconciliations of EBITDA to the applicable GAAP measure can be found on page 10

Westlake Chemical Corporation Second Quarter 2021 Financial Highlights (1) Reconciliations of EBITDA, Vinyls EBITDA, Olefins EBITDA and Corporate EBITDA to the applicable GAAP measures can be found on pages 10 and 11 Second Quarter 2021 vs. First Quarter 2021 + Higher sales prices for all of our major products including PVC resin, polyethylene, building and construction materials and caustic soda + Higher sales volumes for PVC resin + Strong earnings in our building and construction materials business driven by high prices Second Quarter 2021 vs. Second Quarter 2020 + Higher sales prices and margins for most of our major products, including PVC resin and polyethylene + Higher sales volumes for PVC resin + Strong earnings in our building and construction materials business driven by higher prices and volumes – Higher feedstock and fuel costs 5 ($ in millions) 2Q2021 1Q2021 2Q2021 vs. 1Q2021 2Q2020 YTD 2021 YTD 2020 YTD 2021 vs. YTD 2020 Sales $2,859 $2,357 21% $1,709 $5,216 $3,641 43% Operating Income $720 $346 108% $36 $1,066 $172 520% Vinyls EBITDA $605 $367 65% $182 $972 $414 135% Olefins EBITDA $316 $216 46% $60 $532 $158 237% Corporate EBITDA $11 ($30) - ($6) ($19) $1 - EBITDA¹ $932 $553 69% $236 $1,485 $573 159%

Vinyls Segment Performance 6 Second Quarter 2021 vs. First Quarter 2021 + Higher sales prices for all of our major products and higher integrated margins + Higher sales volumes for PVC resin + Strong earnings in our building and construction materials business driven by higher prices – Lower caustic sales volumes Second Quarter 2021 vs. Second Quarter 2020 + Higher sales prices and margins + Higher sales volumes for PVC resin + Strong earnings in our building and construction materials business driven by higher prices and volumes – Higher feedstock and fuel costs +18.2% +2.1% Vinyls Segment 2Q 2021 vs. 1Q 2021 +53.5% +9.0% Vinyls Segment 2Q 2021 vs. 2Q 2020 ($ in millions) 2Q2021 1Q2021 2Q2021 vs. 1Q2021 2Q2020 YTD 2021 YTD 2020 YTD 2021 vs. YTD 2020 Sales $2,188 $1,820 20% $1,348 $4,008 $2,853 40% Operating Income $435 $200 118% $20 $635 $93 583% EBITDA¹ $605 $367 65% $182 $972 $414 135% (1) Reconciliations of EBITDA to the applicable GAAP measure can be found on page 11

Olefins Segment Performance 7 Second Quarter 2021 vs. First Quarter 2021 + Higher polyethylene sales prices and margins – Higher ethane feedstock costs Second Quarter 2021 vs. Second Quarter 2020 + Higher polyethylene sales prices and margins – Lower polyethylene sales volumes – Higher ethane feedstock costs +25.5% -0.6% Olefins Segment 2Q 2021 vs. 1Q 2021 +99.9% -13.9% Olefins Segment 2Q 2021 vs. 2Q 2020 ($ in millions) 2Q2021 1Q2021 2Q2021 vs. 1Q2021 2Q2020 YTD 2021 YTD 2020 YTD 2021 vs. YTD 2020 Sales $671 $537 25% $361 $1,208 $788 53% Operating Income $277 $180 54% $25 $457 $87 425% EBITDA¹ $316 $216 46% $60 $532 $158 237% (1) Reconciliations of EBITDA to the applicable GAAP measure can be found on page 11

Financial Reconciliations

Consolidated Statements of Operations 9 Net sales $ 2,357 $ 2,859 $ 1,709 $ 5,216 $ 3,641 Cost of sales Gross profit Selling, general and administrative expenses Amortization of intangibles Restructuring, transaction and integration-related costs Income from operations Interest expense Other income, net Income before income taxes Provision for (benefit from) income taxes Net income Net income attributable to noncontrolling interests Net income attributable to Westlake Chemical Corporation $ 242 $ 522 $ 15 $ 764 $ 160 Earnings per common share attributable to Westlake Chemical Corporation: Basic $ 1.88 $ 4.06 $ 0.11 $ 5.94 $ 1.24 Diluted $ 1.87 $ 4.04 $ 0.11 $ 5.91 $ 1.24 9 25 21 11 325 72 14 158 536 136 27 (In millions of dollars, except per share data) 253 (19) 230 (60) - 346 (33) 12 (36) (40) (69) (71) 24 789 181 694 5 1,019 121 10 9 22 20 - 2 - 2 720 36 1,066 172 125 104 261 224 27 27 54 54 Three months ended March 31, 872 169 1,381 452 2021 1,848 509 1,987 1,540 3,835 3,189 Three months ended June 30, Six months ended June 30, 2021 2020 2021 2020

Reconciliation of EBITDA to Net Income, Income from Operations and Net Cash Provided by Operating Activities 10 Three months ended March 31, Three months ended June 30, Six months ended June 30, 2021 2021 2020 2021 2020 (In millions of dollars) Net cash provided by operating activities $ 265 $ 617 $ 448 $ 882 $ 509 Changes in operating assets and liabilities and other (2) (67) (454) (69) (232) Deferred income taxes (10) (14) 30 (24) (96) Net income 253 536 24 789 181 Less: Other income, net 12 10 9 22 20 Interest expense (33) (36) (40) (69) (71) Benefit from (provision for) income taxes (72) (158) 19 (230) 60 Income from operations 346 720 36 1,066 172 Add: Depreciation and amortization 195 202 191 397 381 Other income, net 12 10 9 22 20 EBITDA $ 553 $ 932 $ 236 $ 1,485 $ 573

Reconciliation of Vinyls, Olefins and Corporate EBITDA to Applicable Operating Income (Loss) 11 Three months ended March 31, Three months ended June 30, Six months ended June 30, 2021 2021 2020 2021 2020 (In millions of dollars) Vinyls EBITDA $ 367 $ 605 $ 182 $ 972 $ 414 Less: Depreciation and Amortization 157 163 154 320 307 Other Income (Expenses) 10 7 8 17 14 Vinyls Operating Income (Loss) 200 435 20 635 93 Olefins EBITDA 216 316 60 532 158 Less: Depreciation and Amortization 36 37 35 73 70 Other Income (Expenses) - 2 - 2 1 Olefins Operating Income (Loss) 180 277 25 457 87 Corporate EBITDA (30) 11 (6) (19) 1 Less: Depreciation and Amortization 2 2 2 4 4 Other Income (Expenses) 2 1 1 3 5 Corporate Operating Income (Loss) (34) 8 (9) (26) (8) Vinyls Operating Income (Loss) 200 435 20 635 93 Olefins Operating Income (Loss) 180 277 25 457 87 Corporate Operating Income (Loss) (34) 8 (9) (26) (8) Total Operating Income (Loss) $ 346 $ 720 $ 36 $ 1,066 $ 172

Quarterly Industry Pricing

1) Industry pricing data was obtained through IHS Markit ("IHS"). We have not independently verified the data. 2) Average Burner Tip contract prices of natural gas over the period. 3) Average Mont Belvieu spot prices of purity ethane over the period. 4) Average Mont Belvieu spot prices of non-TET propane over the period. 5) Average North American spot prices of ethylene over the period. 6) Average North American Net Transaction prices of polyethylene low density GP-Film grade over the period. 7) Average North American contract prices of styrene over the period. 8) Average USGC-CSLi index values for caustic soda over the period. As stated by IHS, "the caustic soda price listing represents the USGC-CSLi values. USGC-CSLi does not reflect contract price discounts, implementation lags, caps or other adjustments factors. Additionally, it is not intended to represent a simple arithmetic average of all market transactions occurring during the month. Rather, the USGC-CSLi is most representative of the month-to-month caustic soda price movement for contract volumes of liquid 50% caustic soda rather than the absolute value of contract prices at a particular point in time. It is intended to serve only as a benchmark." 9) Average North American contract prices of chlorine over the period. 10) Average North American contract prices of pipe grade polyvinyl chloride ("PVC") over the period. As stated by IHS, "the contract resin prices posted reflect an "index" or "market" for prices before discounts, rebates, incentives, etc." 11) Average North American export price for low density polyethylene GP-Film grade over the period. 12) Average North American low spot export prices of caustic soda over the period. 13) Average North American spot export prices of PVC over the period. Average Quarterly Industry Prices (1) 13 Quarter Ended June 30, 2020 September 30, 2020 December 31, 2020 March 31, 2021 June 30, 2021 Average domestic prices Natural gas ($/MMBtu) (2) 1.8 2.0 2.7 2.8 2.9 Ethane (cents/lb) (3) 6.4 7.4 7.1 8.1 8.7 Propane (cents/lb) (4) 9.6 11.9 13.5 21.2 20.7 Ethylene (cents/lb) (5) 11.0 19.3 24.0 45.1 43.0 Polyethylene (cents/lb) (6) 49.0 61.0 67.7 78.0 99.0 Styrene (cents/lb) (7) 48.3 53.8 59.6 76.5 90.5 Caustic soda ($/short ton) (8) 698 697 653 648 755 Chlorine ($/short ton) (9) 175 176 193 234 309 PVC (cents/lb) (10) 66.5 73.3 84.5 92.8 105.0 Average export prices Polyethylene (cents/lb) (11) 38.5 45.7 53.2 76.3 89.7 Caustic soda ($/short ton) (12) 319 260 219 249 333 PVC (cents/lb) (13) 27.5 38.5 55.4 67.8 77.8

Safe Harbor Language This presentation contains certain forward-looking statements including statements regarding PVC, polyethylene, building products and caustic soda pricing and demand, continued recovery in key end markets (such as housing starts), our cost control and efficiency efforts, our ability to capture integrated chain margin, results of reinvestment in our businesses and our reduction in carbon impact. Actual results may differ materially depending on factors, including, but not limited to, the following: the timing to consummate the previously announced acquisitions (the “Acquisitions”) of (i) Boral Limited’s North American building products business and (ii) LASCO Fittings, Inc. (“LASCO”); the conditions to the closing of the Acquisitions may not be satisfied or the closing of the Acquisitions otherwise does not occur; the risk that Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, approval is not obtained or is obtained subject to conditions that are not anticipated; the diversion of management time on transaction- related issues; the ultimate timing, outcome and results of integrating the operations of the Boral target companies and LASCO and the ultimate outcome of our operating efficiencies applied to the products and services of the Boral target companies and LASCO; the effects of the Acquisitions, including the combined company’s future financial condition, results of operations, strategy and plans; and expected synergies and other benefits from the Acquisitions and our ability to realize such synergies and other benefits; general economic and business conditions; the cyclical nature of the chemical and building products industries; the availability, cost and volatility of raw materials and energy; uncertainties associated with the United States, European and worldwide economies, including those due to political tensions and unrest in the Middle East and elsewhere; uncertainties associated with pandemic infectious diseases, particularly COVID-19; current and potential governmental regulatory actions in the United States and other countries; industry production capacity and operating rates; the supply/demand balance for our products; competitive products and pricing pressures; instability in the credit and financial markets; access to capital markets; terrorist acts; operating interruptions (including leaks, explosions, fires, weather-related incidents, mechanical failure, unscheduled downtime, labor difficulties, transportation interruptions, spills and releases and other environmental risks); changes in laws or regulations, including trade policies; technological developments; foreign currency exchange risks; our ability to implement our business strategies; creditworthiness of our customers; and other factors described in our reports filed with the Securities and Exchange Commission. Many of these factors are beyond our ability to control or predict. Any of these factors, or a combination of these factors, could materially affect our future results of operations and the ultimate accuracy of the forward-looking statements. These forward-looking statements are not guarantees of our future performance, and our actual results and future developments may differ materially from those projected in the forward-looking statements. Management cautions against putting undue reliance on forward-looking statements. Every forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to publicly update or revise any forward-looking statements. Investor Relations Contacts Westlake Chemical 2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 713-960-9111 Steve Bender Executive Vice President & Chief Financial Officer Jeff Holy Vice President & Treasurer 14

XML

Cover Page	Aug. 03, 2021
Document Information [Line Items]
Document Type	8-K
Document Period End Date	Aug. 03, 2021
Entity Registrant Name	Westlake Chemical Corporation
Entity Incorporation, State or Country Code	DE
Entity File Number	001-32260
Entity Tax Identification Number	76-0346924
Entity Address, Address Line One	2801 Post Oak Boulevard,
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Houston,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	960-9111
Written Communications	false
Soliciting Material	false
Pre-commencement Tender Offer	false
Pre-commencement Issuer Tender Offer	false
Entity Emerging Growth Company	false
Amendment Flag	false
Entity Central Index Key	0001262823
Common Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	WLK
Security Exchange Name	NYSE
One Point Six Two Five Percentage Senior Notes Due Twenty Twenty Nine [Member] [Domain]
Document Information [Line Items]
Title of 12(b) Security	1.625% Senior Notes due 2029
Trading Symbol	WLK29
Security Exchange Name	NYSE