PolyOne Expands Color Portfolio with Acquisition of Mesa PolyOne Expands Specialty Color Portfolio with Rutland Acquisition PolyOne Appoints Mark Crist to President of Color, Additives & Inks; Scott Horn to President of Distribution

Polymer Additives Polymer Colorants Engineered Polymer Formulations

Polymer Colorants Corrugated Sheet ColorMatrix™ Liquid Color Concentrates achieved the beige color target with a uniform coloring process, ensuring a highquality sheet appearance

The presentations will do a deep dive on the eight ways we approach sustainability, which include lightweighting, reduced energy use, sustainable infrastructure and human health & safety, to name a few.” Rose Vice President, Marketing and Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 7 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended March 31, 2023 2022 Sales $ 845.7 $ 892.2 Operating Income 57.1 102.2 Net income from continuing operations attributable to Avient shareholders 20.8 64.4 Basic earnings per share from continuing operations attributable to Avient shareholders $ 0.23 $ 0.70 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.23 $ 0.70 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. Three Months Ended March 31, 2023 2022 Sales: Color, Additives and Inks $ 537.0 $ 649.5 Specialty Engineered Materials 309.7 243.1 Corporate (1.0) (0.4) Sales $ 845.7 $ 892.2 Gross margin: Color, Additives and Inks $ 162.0 $ 192.1 Specialty Engineered Materials 93.9 68.4 Corporate (8.3) (6.1) Gross margin $ 247.6 $ 254.4 Selling and administrative expense: Color, Additives and Inks $ 96.4 $ 97.6 Specialty Engineered Materials 50.8 30.1 Corporate 43.3 24.5 Selling and administrative expense $ 190.5 $ 152.2 Operating income: Color, Additives and Inks $ 65.6 $ 94.5 Specialty Engineered Materials 43.1 38.3 Corporate (51.6) (30.6) Operating income $ 57.1 $ 102.2 Depreciation & amortization: Color, Additives and Inks $ 25.8 $ 26.0 Specialty Engineered Materials 21.2 7.8 Corporate 3.5 3.8 Depreciation & Amortization $ 50.5 $ 37.6 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 91.4 $ 120.5 Specialty Engineered Materials 64.3 46.1 Corporate (48.1) (26.8) Other income (expense), net 0.7 (0.6) EBITDA $ 108.3 $ 139.2 13 Attachment 7 Avient Corporation 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 how it may serve as a basis for future performance.

Polymer Colorants Corrugated Sheet ColorMatrix™ Liquid Color Concentrates achieved the beige color target with a uniform coloring process, ensuring a highquality sheet appearance

These innovations include Avient’s PCR Color Prediction Service, ColorForward™ 2025, and new grades of polymer additives for flexible film. ColorForward™ 2025: the 19th edition of Avient’s color trend forecast developed to inspire brand owners and designers of plastic products, featuring 20 colors and effects derived from societal trends likely to influence consumer color preferences and the design of consumer products in the future PCR Color Prediction Service: a digital tool that can illustrate the color possibilities or limitations of certain types of recycled resins (PCR) prior to laboratory trials, which can help simplify the overall color decision-making process during product development and launch

It is also a preferred choice for automotive manufacturers as a warning of potential safety hazards. This is where Avient’s orange nylon colorants can help. Its portfolio of OnColor™ polymer colorants was developed to improve the heat and long-term color stability of cautionary orange polymers for high-voltage EV connectors, offering the following benefits: • Long-term fading resistance in thermal aging tests at up to 130°C for 1,000 hours, • No migration, excellent processing stability • Lower corrosion risk vs. typical comparable colorants • No impact on flame retardancy and limited adverse effects on essential mechanical characteristics, including flexural and impact strength Avient’s orange nylon colorants are available in several validated RAL, Pantone, and JPMA orange shades for compounding, injection molding, and extrusion.

Polymer Colorants Corrugated Sheet ColorMatrix™ Liquid Color Concentrates achieved the beige color target with a uniform coloring process, ensuring a highquality sheet appearance

Avient acquired the Clariant Color business on July 1, 2020 (the “Acquisition Date”). To provide comparable financial results, the Company references “pro forma” financial metrics, which include the business results of Clariant Color for periods prior to the Acquisition Date. As presented in previous slides, this presents potential benefits with respect to leverage and EBITDA margins 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.

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