Exhibit 99.1

NEWS RELEASE

FOR IMMEDIATE RELEASE

PolyOne Announces Third Quarter 2013 Results

CLEVELAND – October 24, 2013 – PolyOne Corporation (NYSE: POL) today reported $1.0 billion of revenue for the third quarter of 2013, a 43% increase compared to $708 million in the third quarter of 2012. Revenue growth was driven by the acquisitions of Spartech and Glasforms, as well as organic growth in Specialty and Distribution.

Adjusted earnings per share grew 29% to $0.36 from $0.28 in the prior year quarter, bringing year-to-date adjusted EPS to 28% above 2012. Earnings per share from continuing operations totaled $0.24 in the third quarter of 2013 compared to $0.22 in the third quarter of 2012. During the third quarter, special items totaling $0.11 were higher than special items of $0.06 in the third quarter of 2012 due to restructuring costs associated with the North American asset realignment announced in July of 2013.

“I am pleased to announce our strong third quarter results and our 16^th consecutive quarter of double-digit adjusted earnings per share expansion. Four consecutive years of substantial growth has resulted from excellence in executing our four-pillar strategy,” said Stephen D. Newlin, Chairman, President, and Chief Executive Officer.

Mr. Newlin added, “Specialization, globalization and commercial and operational excellence are woven into the culture of our organic businesses and are quickly being adopted by the recently acquired Spartech and Glasforms. Our Specialty Platform has been the cornerstone of our transformation, and this quarter was no different, as specialty growth drove our strong results. With 64% of our segment operating income from our Specialty Platform, our mix of earnings has never been stronger.”

Speaking about the Spartech acquisition, Robert M. Patterson, Executive Vice President and Chief Operating Officer said, “When we announced our acquisition of Spartech we assumed we would deliver $65 million of synergies or profit expansion by the end of year three following the deal. We have seen excellent progress in accelerating our integration efforts, and year to date, we have delivered $0.06 of EPS accretion from Spartech.” Patterson added, “We now expect to deliver the full $65 million in synergies and $0.50 of EPS accretion in calendar year 2015.”

“We ended the quarter with $323 million of cash and over $630 million of liquidity,” said Richard J. Diemer, Jr., Senior Vice President and Chief Financial Officer. “With this liquidity, we expect to continue to deploy cash by investing in research and development, commercial resources, realigning the Spartech assets and selective M&A. We also expect to continue to return cash to shareholders via dividends and share repurchases.”

During the quarter, the Company repurchased 877,000 common shares under its existing share repurchase program, bringing the total to 3.85 million shares repurchased for the year, at an average price of $24.89. Additionally, the Company repurchased $44.7 million (par value) of debt on the open market during the past quarter, principally consisting of its 2020 senior notes.

Commenting on the Company’s outlook, Mr. Newlin said, “Our four-pillar strategy is paying off, and our commitment to executing this strategy has enabled us to achieve new record profitability and earnings per share. While the fourth quarter is seasonally our weakest, we believe we will be able to continue to deliver double-digit adjusted earnings per share growth for the last three months of 2013.” Newlin further stated, “And with our current trajectory of organic growth and upside from Spartech synergy capture, we reaffirm our stated goal of $2.50 of adjusted earnings per share by 2015.”

About PolyOne

PolyOne Corporation, with 2012 revenues of $2.9 billion, is a premier provider of specialized polymer materials, services and solutions. The company is dedicated to serving customers in diverse industries around the globe, by creating value through collaboration, innovation and an unwavering commitment to excellence. Guided by its Core Values, Sustainability Promise and No Surprises Pledge^(SM), PolyOne is committed to its customers, employees, communities and shareholders through ethical, sustainable and fiscally responsible principles. For more information, visit www.polyone.com.

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To access PolyOne’s news library online, please visit www.polyone.com/news

Investor Relations Contact:

Isaac D. DeLuca

Vice President, Planning & Investor Relations

PolyOne Corporation

+1 440-930-1226

isaac.deluca@polyone.com

Media Contact:

Kyle Rose

Director, Corporate Communications

PolyOne Corporation

+1 440-930-3162

kyle.rose@polyone.com

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Forward-looking Statements

In this press release, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements give current expectations or forecasts of future events and are not guarantees of future performance. They are based on management’s expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. They use words such as “will,” “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” and other words and terms of similar meaning in connection with any discussion of future operating or financial condition, performance and/or sales. Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: the final amount of charges resulting from the North American asset realignment and our ability to realize anticipated savings and operational benefits from the asset realignment; our ability to achieve the strategic and other objectives relating to the acquisition of Spartech Corporation, including any expected synergies; our ability to successfully integrate Spartech and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive at expected levels and within the expected timeframe; disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the financial condition of our customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability; the speed and extent of an economic recovery, including the recovery of the housing market; our ability to achieve new business gains; the effect on foreign operations of currency fluctuations, tariffs, and other political, economic and regulatory risks; changes in polymer consumption growth rates where we conduct business; changes in global industry capacity or in the rate at which anticipated changes in industry capacity come online; fluctuations in raw material prices, quality and supply and in energy prices and supply; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; an inability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to working capital reductions, cost reductions, and employee productivity goals; an inability to raise or sustain prices for products or services; an inability to maintain appropriate relations with unions and employees; the inability to achieve expected results from our acquisition activities; our ability to continue to pay cash dividends; the amount and timing of repurchases of our common shares, if any; and other factors affecting our business beyond our control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation. The above list of factors is not exhaustive.

We undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission.

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Attachment 1

Summary of Condensed Consolidated Statements of Income (Unaudited)

(In millions, except per share data)

Senior management uses comparisons of net income from continuing operations attributable to PolyOne shareholders and diluted earnings per share (EPS) from continuing operations attributable to PolyOne shareholders before adjustments to assess performance and facilitate comparability of results with prior periods. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable measures calculated and presented in accordance with U.S. GAAP (GAAP).

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Attachment 2

PolyOne Corporation

Condensed Consolidated Statements of Income (Unaudited)

(In millions, except per share data)

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Attachment 3

PolyOne Corporation

Summary of Special Items (Unaudited)

(In millions, except per share data)

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Attachment 4

PolyOne Corporation

Condensed Consolidated Balance Sheets

(In millions)

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Attachment 5

PolyOne Corporation

Consolidated Statements of Cash Flows (Unaudited)

(In millions)

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Attachment 6

Business Segment and Platform Operations (Unaudited)

(In millions)

Operating income at the segment level does not include: special items as defined in Attachment 3; corporate general and administration costs that are not allocated to segments; intersegment sales and profit eliminations; share-based compensation costs; and certain other items that are not included in the measure of segment profit and loss that is reported to and reviewed by the chief operating decision makers. These costs are included in Corporate and eliminations.

Specialty Platform consists of our three specialty segments: Global Specialty Engineered Materials; Global Color, Additives and Inks; and Designed Structures and Solutions. We present Specialty Platform sales, gross margin, selling and administration, and operating income, because management believes that this is useful information to investors by highlighting our collective progress in advancing our specialization strategy.

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Attachment 7

Reconciliation of Non-GAAP Financial Measures (Unaudited)

(In millions, except per share data)

Senior management uses gross margin before special items and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and that current levels may serve as a base for future performance. In addition, operating income before the effect of special items is a component of various PolyOne annual and long-term employee incentive plans and is used in debt covenant computations. Below is a reconciliation of non-GAAP financial measures to the most directly comparable measures calculated and presented in accordance with GAAP. See Attachment 3 for a definition of special items.

Senior management uses the “Mix Shift Highlights Specialty Transformation” graph to show PolyOne’s progression toward its specialty targets.

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Senior management uses net debt as a measure of our financial position. Below is a reconciliation of this non-GAAP financial measure to the most directly comparable measure calculated and presented in accordance with GAAP.

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