Public- AVNT on the NYSE What year was Avient created? PolyOne was created in 2000 through the consolidation of The Geon Company and M.A. Soft target of 60 - 90 days depending on complexity and risk.

PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation KeyBanc 2013 Capital Markets’ Basic Materials & Packaging Conference September 10th, 2013 • 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. In certain cases throughout this presentation, we have presented GAAP and non-GAAP financial measures adjusted to reflect full- year 2012 Pro forma results, including Spartech and Glasforms and excluding discontinued operations. • PolyOne’s chief operating decision makers use these financial measures to monitor and evaluate the ongoing performance of the Company and each business segment and to allocate resources. EPS: $2.50 Assumptions • Operating margins in mid-range of 2015 targets • No global recession • No investment in incremental PP&S capacity • Completion of 2-3 midsize accretive acquisitions • Housing starts at 85% of 50 year norm by 2015 • Mid single digit revenue CAGR • Remain comfortably below 3X Net Debt / EBITDA Page 11 2012 Rev: $2.9B Adj.

PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation Bank of America Merrill Lynch 2013 US Basic Materials Conference December 11, 2013 • 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. In certain cases throughout this presentation, we have presented GAAP and non-GAAP financial measures adjusted to reflect full- year 2012 Pro forma results, including Spartech and Glasforms and excluding discontinued operations. • PolyOne’s chief operating decision makers use these financial measures to monitor and evaluate the ongoing performance of the Company and each business segment and to allocate resources. EPS: $2.50 Assumptions • Mid single digit revenue CAGR • Operating margins in mid-range of 2015 targets • No global recession • No investment in incremental PP&S capacity • Housing starts at 85% of 50 year norm by 2015 • Remain comfortably below 3X Net Debt / EBITDA Page 11 2012 Rev: $2.9B Adj.

We partner with Brand Owners / OEMs, processors and assemblers to enable their goals in applications like packaging, healthcare, consumer goods, transportation, wire & cable, building & construction and textiles. Tenure of our relationships with multi-national OEMs exceeds 15 years. Deliver cumulative annual revenue growth from sustainable solutions portfolio of 8-12% Assess top 90% of supplier spend for alignment with Avient Sustainability objectives.

ONFLEX S HF ONFLEX S HF & HF 7001 SYNPRENE RT-5180 ROHS NATURAL Commercial Availability Asia Europe Americas RoHS Compliant Yes Yes Yes Color Natural Natural Natural Hardness 70/80/90 Shore A 50/70/90 Shore A 80 Shore A Flame Retardant Package Non-Halogenated Non-Halogenated Halogenated Processing Method Injection Molding Extrusion Injection Molding Injection Molding Extrusion ELECTRICAL & ELECTRONICS SOLUTIONS REDUCE POSSIBILITY OF MOLDED CASE CIRCUIT BREAKER FAILURE WITH TPE PHASE BARRIERS www.avient.com Copyright © 2025, Avient Corporation. Unlike flexible PVC, which loses flexibility over time, Avient materials do not fail over the MCCB’s service life (approximately 10 years). Good insulation between phases – Our materials deliver dielectric properties better than nylon and equivalent to flexible PVC, helping to prevent arc flash across the phases.

in the prior year quarter in the prior year quarter.  a 14% increase from the prior year quarter, and maintained its full year adjusted EPS guidance of

It creates a smaller carbon footprint than virgin carbon black because it uses 90 percent less water and 61 percent less electricity while emitting 90 percent less carbon dioxide in its manufacturing process.*   “We continue to look for ways to help our customers meet their sustainability goals by developing products that are environmentally responsible,” says Kevin Jones, general manager, PolyOne Color & Additives, North America. Barrier technologies that preserve the shelf-life and quality of food, beverages, medicine and other perishable goods through high-performance materials that require less plastic

We partner with Brand Owners / OEMs, processors and assemblers to enable their goals in applications like packaging, healthcare, consumer goods, transportation, wire & cable, building & construction and textiles. Tenure of our relationships with multi-national OEMs exceeds 15 years. Assess top 90% of supplier spend for alignment with Avient Sustainability objectives.

All Rights Reserved 2025 Full-year 2024 highlights ► 4% organic revenue growth for Avient; 3% for CAI and 6% for SEM ► Adjusted EBITDA margin expanded 20 bps for Avient; 90 bps for CAI and 110 bps for SEM ► New strategy in execution Leadership team strengthened with a new CTO, CIO, General Counsel, SVP (New business development & marketing) in place ► New compensation plan rolled out in January 2025, in direct alignment with the strategy ► 2024 was our safest year on record ► Increased dividend 5% to $1.08 on an annualized basis; 14th consecutive increase FY 2024 results FULL YEAR 2024 VS. All Rights Reserved 2025 19 Avient full year 2024 performance vs. full year 2023 Sales 3,143 3,240 FY 2023 FY 2024 EXCL. EPS - Full year 2025 $2.70 to $2.94 Q1 2025 $0.76 adj.

in the prior year quarter in the prior year. Year Ended