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All Rights Reserved 2025 23 NON-HYDROCARBON MATERIALS HYDROCARBON-BASED ~35% of the raw material basket including part of “Other raw materials” are hydrocarbon-based Raw material basket 16% 14% 9% 2% 37% 9% 5% 4% 4% Performance additives Pigments TiO2 Dyestuffs Styrenic block copolymers Polypropylene Nylon Polyethylene Other raw materials Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

Strong past performance demonstrates that our strategy and execution are workinggy g • Megatrends align with our strengths • Innovation and services provide differentiation and competitive advantage • Strong and proven management team driving growth and performancegrowth and performance The New PolyOne: A Specialty Growth Company $2015 Target: $2.50 Adjusted EPS Page 16 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.

All Rights Reserved 2025 17 NON-HYDROCARBON MATERIALS HYDROCARBON-BASED ~35% of the raw material basket including part of “Other raw materials” are hydrocarbon-based Raw material basket 16% 14% 9% 2% 37% 9% 5% 4% 4% Performance additives Pigments TiO2 Dyestuffs Styrenic block copolymers Polypropylene Nylon Polyethylene Other raw materials Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income attributable to Avient common shareholders and diluted adjusted earnings per share (EPS) attributable to Avient common shareholders, excluding special items, to assess performance and facilitate comparability of results.

Refer to the individual Technical Data Sheet for drying recommendations for specific grades. For a specific overmolding grade, follow the color carrier recommendations on the individual Technical Data Sheets. Refer to the Technical Data Sheet for the chosen grade to determine barrel temperature settings.

Refer to the individual Technical Data Sheet for drying recommendations for specific grades. For a specific overmolding grade, follow the color carrier recommendations on the individual Technical Data Sheets. Refer to the Technical Data Sheet for the chosen grade to determine barrel temperature settings.

To obtain information regarding the viscosity of an individual grade, refer to the Product Technical Data Sheet. For shrinkage values for specific grades, please refer to the product technical data sheet.

To obtain information regarding the viscosity of an individual grade, refer to the Product Technical Data Sheet. For shrinkage values for specific grades, please refer to the product technical data sheet.