PolyOne Corporation Page 3 Use of Non-GAAP Measures  This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. Schedule I Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Below is a reconciliation of non-GAAP financial measures to the most directly comparable measures calculated and presented in accordance with U.S. 1) Special items are a non-GAAP financial measure.

TIER 1 AEROSPACE SUPPLIER S E A T I N G S T R U C T U R A L C O M P O N E N T • Reduce weight to improve fuel economy • Pass FAA flame, smoke, toxicity requirements • Meet structural requirements • Simplify manufacturing process • Lowered weight ~40% versus aluminum while maintaining the strength performance properties • Formulated a PES material to satisfy flame, smoke, toxicity (FST) standards for commercial aircraft • Passed and/or exceeded customer’s impact testing specifications • Provided an injection moldable hybrid glass/carbon fiber solution that enabled lower viscosity and better processability for thin wall parts Complēt™ Long Hybrid (Carbon + Glass) Fiber Reinforced PES Composite KEY REQUIREMENTS WHY AVIENT?

Pallet Non-slip Strips Bergamid™ polymer formulations and GLS™ TPEs replace metal and provide comfort and usability for Swiss soldiers pocket knife Bergamid™ polymer formulations and GLS™ TPEs replace metal and provide comfort and usability for Swiss soldiers pocket knife

In addition, Geon HC materials offer excellent flame resistance, impact resistance and flow properties.

Flame resistant

Versaflex TPE meets these needs and also complies with both the European Union Restriction of Hazardous Substances (RoHS) directive and stringent UL flame ratings.

Geonä CPVC: combines inherent flame resistance and chemical resistance with elevated temperature performance for many industrial applications

Lightweight, strong and durable, with good heat, flame and chemical resistance

Enhanced Safety: Polymers can be engineered to provide flame resistance and can reduce the risk of thermal runaway, which is critical for EV battery applications.

Enhanced Safety: Polymers can be engineered to provide flame resistance and can reduce the risk of thermal runaway, which is critical for EV battery applications.