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Q2 Avient Corporation Earnings Conference Call More Q1 Avient Corporation Earnings Conference Call More Q4 Avient Corporation Earnings Conference Call More

Q2 Avient Corporation Earnings Conference Call More Q1 Avient Corporation Earnings Conference Call More Q4 Avient Corporation Earnings Conference Call More

Q2 Avient Corporation Earnings Conference Call More Q1 Avient Corporation Earnings Conference Call More Q4 Avient Corporation Earnings Conference Call More

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Q2 Avient Corporation Earnings Conference Call More Q1 Avient Corporation Earnings Conference Call More Q4 Avient Corporation Earnings Conference Call More

PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation 5th Annual Wells Fargo Industrial and Construction Conference May 8, 2014 • In this presentation, 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. The non-GAAP financial measures include: adjusted EPS, earnings before interest, tax, depreciation and amortization (EBITDA), adjusted EBITDA, net debt, Specialty platform operating income, Specialty platform gross margin percentage, adjusted operating income, return on invested capital, net debt/ EBITDA, and the exclusion of corporate charges in certain calculations. Platform operating income mix percentage 2005Y* 2008Y* 2010Y* 2013Y 2014 Q1 Global Specialty Engineered Materials $ 0.4 $ 17.6 $ 49.7 $ 57.2 $ 18.3 Global Color, Additives and Inks 4.3 28.1 37.7 104.0 30.4 Designed Structures and Solutions - - - 33.4 11.2 Specialty Platform $ 4.7 $ 45.7 $ 87.4 $ 194.6 $ 59.9 Performance Products and Solutions 75.7 31.3 54.0 56.0 16.0 Distribution 19.5 28.1 42.0 63.3 17.2 SunBelt Joint venture 91.9 28.6 18.9 - - Corporate (51.5) (425.1) (27.7) (82.4) (36.7) Operating income (loss) GAAP $ 140.3 $ (291.4) $ 174.6 $ 231.5 $ 56.4 Less: Corporate operating expense 51.5 425.1 27.7 82.4 36.7 Operating income excluding Corporate $ 191.8 $ 133.7 $ 202.3 $ 313.9 $ 93.1 Specialty platform operating mix percentage 2% 34% 43% 62% 64% * Historical results include the Resin and Specialty Coatings businesses within the Performance Products and Solutions segment.

POLYONE CORPORATION 9 Our Internet address is www.polyone.com. President and Chief Executive Officer — ChemDesign Corporation (a custom chemical manufacturer), December 2001 to July 2006. Newlin Chairman, President and Chief Executive Officer February 13, 2014 POLYONE CORPORATION Exhibit 31.2 CERTIFICATION I, Bradley C.

Our Internet address is www.polyone.com. PATTERSON President and Chief Executive Officer, PolyOne Corporation Committee: 3 RICHARD H. GOFF President and Chief Executive Officer, Tesoro Corporation and Chairman and Chief Executive Officer, Tesoro Logistics Committees: 3*, 4 GORDON D.