Exhibit 99.1

FOR IMMEDIATE RELEASE

LSB INDUSTRIES, INC. REPORTS IMPROVED ADJUSTED OPERATING RESULTS

FOR THE 2015 FIRST QUARTER

Provides Chemical Business Product Volume Guidance for 2015 Second Quarter

OKLAHOMA CITY, Oklahoma…May 8, 2015… LSB Industries, Inc. (“LSB”) (NYSE: LXU) today announced results for the first quarter ended March 31, 2015.

Financial Highlights of First Quarter 2015 Compared to First Quarter 2014

“Our first quarter results reflect the progress we’ve made in strengthening our operations, particularly in our Chemical Business,” stated Barry Golsen, LSB’s President and CEO. “Chemical sales grew more than 10% compared to the 2014 first quarter, driven by greater on-stream rates at our facilities, particularly at our Pryor Facility, where the reliability initiatives we’ve been implementing over the past 18 months are increasingly translating into more consistent production levels. Chemical Business results also benefitted from higher selling prices while profitability was aided by lower natural gas costs. Partially offsetting these tailwinds was the operating loss at our El Dorado facility resulting from its use of high cost ammonia as its primary feedstock, as compared to the cost effective natural gas used by our Pryor and Cherokee Facilities to make their own ammonia. We expect this cost disadvantage to persist until our expansion projects at El Dorado, which remain on time and on budget, are completed. Once the ammonia plant is up and running in the first quarter of 2016, we expect the economics of this facility to greatly improve, resulting in significant incremental operating profit.”

“We expect strong nitrogen fertilizer applications during the second quarter, as excessive rain and cooler temperatures delayed applications in the first quarter. Looking out over the balance of 2015, recent seasons of record corn corps have resulted in historically high stock-to-use ratios, which is expected to prompt a reduction in corn acres planted for the year. With fewer acres, however, we believe farmers will likely attempt to drive better yields through increased usage of nitrogen fertilizers. As such, our current view is that agricultural market fundamentals for our products will remain favorable for the foreseeable future.”

“With respect to our mining related products, the U.S. Energy Information Administration is forecasting a 7% decline in coal production for 2015. This combined with the termination of our agreement with Orica, which ended in early April, is likely to result in lower sales and profits related to industrial grade AN for the current year. To date, we have replaced approximately 70% of the AN volume that had formerly been committed to Orica with new customer commitments, however, these new agreements will not go into full effect until 2016 when our El Dorado Facility is able to produce its own ammonia and our product is cost competitive. The industrial markets we serve should continue to benefit from the improving economy and low natural gas prices. Overall, we continue to anticipate sufficient demand in 2015 to absorb the higher production levels we expect to achieve as a result of continued improvement in the on-stream rates of our chemical facilities.”

Mr. Golsen continued, “First quarter sales and bookings for our Climate Control Business grew 8% and 5%, respectively compared to the prior year period, despite the previously disclosed termination of our agreement with Carrier for heat pumps. Excluding Carrier contracts from the first quarter of 2014, sales and bookings increased 20% and 18%, respectively, reflecting stronger demand for our large custom air handlers and hydronic fan coils for the commercial market. We expect to continue to capitalize on the strengthening demand environment which, given the operating leverage inherent in our Climate Control Business, should lead to margin expansion. We anticipate that ongoing progress with our operational excellence initiatives will serve to further enhance our profitability improvement.”

Chemical Business First Quarter 2015 Compared to First Quarter 2014:

Comparison of 2015 to 2014 periods:

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The following tables provide key operating metrics for the Agricultural products of our Chemical Business.

With respect to sales of Industrial, Mining and Other Chemical Products, the following table indicates the volumes sold of our major products.

Climate Control Business First Quarter 2015 Compared to First Quarter 2014:

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Comparison of 2015 to 2014 periods:

Financial Position and Capital Additions

As of March 31, 2015, our total cash and investments were $211.1 million, including short-term investments as well as noncurrent restricted investments designated for capital projects.

Total long-term debt was $455.7 million at March 31, 2015 compared to $457.3 million at December 31, 2014 and our $100 million Working Capital Revolver Loan remains undrawn (borrowing availability of $75.6 million). Interest expense, net of capitalized interest, for the first quarter of 2015 was $3.4 million compared to $6.7 million for the same period in 2014.

Capital additions were $78.5 million in the first quarter of 2015, including $69.1 million relating to the expansion projects at our El Dorado Facility, which include a 1,150 ton per day anhydrous ammonia production plant; a new 1,100 ton per day 65% strength nitric acid plant and concentrator; and other support infrastructure. Planned capital additions for the remainder of 2015, in the aggregate, are estimated to range from $227 million to $276 million, including $162 million to $187 million remaining for the El Dorado expansion projects.

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The Company’s outlook for sales volume for the second quarter of 2015 in its Chemical Business is as follows:

Mr. Golsen concluded, “The first quarter of 2015, while still far from what we know our Company is capable of achieving, represents a positive step towards delivering sustainable profitable revenue growth in both of our businesses. We remain confident in our prospects for continued performance improvement for the balance of 2015 and a material expansion of profitability beginning in 2016, when our new capacity at El Dorado is up and running. We believe that the strategic improvements we are making to bolster returns in both our Chemical and Climate Control businesses will allow us to capitalize on improving market conditions and drive enhanced value for all of our shareholders.”

Conference Call

LSB’s management will host a conference call covering the first quarter results on Friday, May 8, 2015 at 10:00 am ET/9:00 am CT to discuss these results and recent corporate developments. Participating in the call will be Executive Chairman, Jack E. Golsen; President and CEO, Barry H. Golsen; Executive Vice President and CFO, Tony M. Shelby; and Senior Vice President, Corporate Development, Mark Behrman. Interested parties may participate in the call by dialing (201) 493-6739. Please call in 10 minutes before the conference is scheduled to begin and ask for the LSB conference call. To coincide with the conference call, LSB will post a slide presentation at www.lsbindustries.com on the webcast section of Investor Info tab.

To listen to a webcast of the call, please go to the Company’s website at www.lsbindustries.com at least 15 minutes before the conference call to download and install any necessary audio software. If you are unable to listen live, the conference call webcast will be archived on the Company’s website. We suggest listeners use Microsoft Explorer as their web browser.

LSB Industries, Inc.

LSB is a manufacturing and marketing company. LSB’s principal business activities consist of the manufacture and sale of chemical products for the agricultural, mining and industrial markets; and, the manufacture and sale of commercial and residential climate control products, such as water source and geothermal heat pumps, hydronic fan coils, modular geothermal and other chillers and large custom air handlers.

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This press release contains certain forward-looking statements within the meaning of the Private Securities Litigation Act of 1995. These forward-looking statements generally are identifiable by use of the words “believe,” “expects,” “intends,” “plans to,” “estimates,” “projects” or similar expressions, including but not limited to, increase operating profit at our El Dorado facility once the new ammonia plant is completed and running; nitrogen fertilizer application during second quarter; corn acres to be planted and increased usage of nitrogen fertilizer; favorable outlook for the foreseeable future to our agricultural products; coal production outlook; sales and profits related to industrial grade AN for balance of year; replacing Orica with new contracts; improvement to industrial markets; production levels in 2015; profitable revenue growth and prospects in our businesses; performance improvements in 2015; future natural gas and ammonia costs; the outlook for the chemical or climate control businesses; improvement to our chemical industrial markets; demand in 2015 to absorb production levels at our chemical facilities; increase sales by our Climate Control Business in 2015; planned capital expenditures for the remainder of 2015; and outlook for sales volume for the second quarter of 2015 in our Chemical Business.

Investors are cautioned that such forward-looking statements are not guarantees of future performance and involve risk and uncertainties, and that actual results may differ materially from the forward-looking statements as a result of various factors, including, but not limited to, general economic conditions; weather conditions; lack of growth in the commercial and residential construction industry; acceptance by the market of our geothermal heat pump products; acceptance of our technology; increased competitive pressures, domestically and foreign; price increases for raw materials; loss of significant customer; changes to federal legislation or adverse regulations; available working capital; ability to install necessary equipment and renovations at the El Dorado Facility and the Pryor Facility in a timely manner; receipt in a timely manner of production equipment; problems with production equipment; and other factors set forth under “Risk Factors” and “A Special Note Regarding Forward-Looking Statements” in the Form 10-K for year ended December 31, 2014 and in the Form 10-Q for the quarter ended March 31, 2015, which contain a discussion of a variety of factors which could cause the future outcome to differ materially from the forward-looking statements contained in this release.

See Accompanying Tables

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LSB Industries, Inc.

Financial Highlights

Three Months Ended March 31,

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LSB Industries, Inc.

Financial Highlights

Three Months Ended March 31,

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LSB Industries, Inc.

Financial Highlights

Three Months Ended March 31, 2015 and 2014

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LSB Industries, Inc.

Consolidated Balance Sheets

(Continued on following page)

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Consolidated Balance Sheets (continued)

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Non-GAAP Reconciliation

This news release includes certain “non-GAAP financial measures” under the rules of the Securities and Exchange Commission, including Regulation G. These non-GAAP measures are calculated using GAAP amounts in our consolidated financial statements.

EBITDA Reconciliations

EBITDA is defined as net income plus interest expense, depreciation, and depletion of property plant and equipment, amortization of other assets, less interest included in amortization, plus provision for income taxes plus loss from discontinued operations. We believe that certain investors consider EBITDA a useful means of measuring our ability to meet our debt service obligations and evaluating our financial performance. EBITDA has limitations and should not be considered in isolation or as a substitute for net income, operating income, cash flow from operations or other consolidated income or cash flow data prepared in accordance with GAAP. Because not all companies use identical calculations, this presentation of EBITDA may not be comparable to a similarly titled measure of other companies. The following table provides a reconciliation of net income to EBITDA for the periods indicated.

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LSB Industries, Inc.

Non-GAAP Reconciliation (continued)

Adjusted Operating Income (Loss), EBITDA, Net Income (Loss) Applicable to Common Stock and Diluted Earnings per Share

Adjusted operating income (loss), adjusted EBITDA, adjusted net income (loss) applicable to common stock and adjusted income (loss) per diluted share are reported to show the impact of the insurance recoveries. We believe that the inclusion of supplementary adjustments to operating income, EBITDA, net income applicable to common stock and diluted income per common share, are appropriate to provide additional information to investors about certain unusual items. The following tables provide reconciliations of operating income, EBITDA, net income applicable to common stock and diluted income per common share excluding the impact of the insurance recoveries.

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Non-GAAP Reconciliation (continued)

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