About PolyOne DeLuca Vice President, Investor Relations PolyOne Corporation +1 440-930-1226 isaac.deluca@avient.com Rose Director, Corporate Communications PolyOne Corporation +1 440-930-3162 kyle.rose@avient.com

USE OF NON-GAAP MEASURES PolyOne Corporation 3 This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. PolyOne’s chief executive officer uses these financial measures to monitor and evaluate the ongoing performance of the Company and each business segment and to allocate resources. In addition, adjusted operating income and adjusted EPS, which exclude the impact of special items, are components of various PolyOne annual and long-term employee incentive plans.

About PolyOne To access PolyOne’s news library online, please go to www.avient.com/news Marketing Communications Manager, Europe PolyOne Corporation

Homepage // News Center // Easier Optical Fiber Installation for High-Speed Connectivity with New PolyOne Low CoF Formulation Wire and cable manufacturers can learn more about this new solution from PolyOne at its stand (Hall 9/B50) this week at the WIRE trade show in Düsseldorf.  About PolyOne PolyOne Corporation, with 2015 revenues of $3.4 billion, is a premier provider of specialized polymer materials, services and solutions. © Shutterstock/PolyOne

Proven solutions on display at PolyOne include: About PolyOne PHOTO CREDIT: polyone

Attachment 1 Special items (1) Rose, Vice President, Corporate Communications, PolyOne Corporation, +1 440-930-3162, kyle.rose@avient.com

Attachment 1 Special items (1) 1)    

OPQ BLUE AQUA OM 3252C OPQ PURPLE LIGHT OM 265C Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

PolyOne is committed to environmentally sound practices, services and solutions that deliver value for our customers and the wider industries we serve,” added John Van Hulle, president of global color, additives and inks for PolyOne. About PolyOne To access PolyOne’s news library online, please go to www.avient.com/news

PolyOne Announces Acquisition of PlastiComp CLEVELAND, June 1, 2018 /PRNewswire/ -- PolyOne Corporation (NYSE: POL), a premier global provider of specialized polymer materials, servi June 1, 2018