News Release - AVNT-2023.12.31-News Release 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Fourth Quarter and Full Year 2023 Results • Fourth quarter and full year GAAP EPS of $0.30 and $0.83 compared to $(0.19) and $0.90 from continuing operations in the prior year • Fourth quarter and full year adjusted EPS of $0.52 and $2.36 exceeds guidance of $0.47 and $2.30 as a result of favorable sales as well as lower net interest expense • Fourth quarter adjusted EPS increased 24% over the prior year pro forma adjusted EPS primarily driven by improved margins from positive portfolio mix, raw material deflation and cost reduction actions • 2024 full year adjusted EPS expected to range from $2.40 to $2.65 as destocking comes to an end and underlying demand starts to improve CLEVELAND – February 14, 2024 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable materials solutions, today announced its fourth quarter and full year results for 2023. Adjusted free cash flow for 2023 was $186 million, slightly ahead of expectations. 2 2024 Outlook “In the first quarter, we expect demand to continue to improve in our two largest end markets, packaging and consumer, as destocking comes to an end and our sustainable solutions portfolio expands. The non-GAAP financial measures include adjusted EPS, adjusted operating income, adjusted gross margin, adjusted EBITDA, adjusted cash flow from operations and free cash flow.

High Strength & Flame Resistance Good flame resistance Protect cables from the damaging effects of water

EUROPEAN MEDICAL DEVICE MANUFACTURER F A C E M A S K V E N T I L A T I O N V A L V E • ISO 9001 and USP VI compliant • Compatible with overmolding onto PP • Translucent and highly colorable • Soft touch • Provided valuable regulatory support and documentation, enabling faster internal trials and material qualification for this customer • Worked together with customer to select the best material from a broad portfolio of medical TPE grades • Trusted as a polymer supplier for multiple healthcare applications Dynaflex™ G2711 Thermoplastic Elastomer KEY REQUIREMENTS WHY AVIENT? AVIENT SOLUTION BIOCOMPATIBILITY + SOFT TOUCH LEARN MORE © 2020, All Right Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 https://www.polyone.com/products/thermoplastic-elastomers/dynaflex-thermoplastic-elastomers European medical device manufacturer

TECHNICAL BULLETIN PREPERM™ and Edgetek™ Low-Loss Dielectric Thermoplastics The PREPERM™ and Edgetek™ dielectric portfolios have been specially formulated to meet application demands for materials that enable faster and more reliable connections at high-band 5G frequencies (mmWave). Processing conditions can cause material properties to shift from the values stated in the information. Avient makes no warranties or guarantees respecting suitability of either Avient’s products or the information for your process or end-use application.

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Home // Renewable Energy From Floating Solar Panels Existing industry solutions failed to protect panels from outdoor exposure and harsh weather conditions. Fixed in idle waters in Taiwan in this case, Avient’s integrated colorant and anti-UV solution is expected to provide 25 years of weathering resistant performance.

Home // Renewable Energy From Floating Solar Panels Existing industry solutions failed to protect panels from outdoor exposure and harsh weather conditions. Fixed in idle waters in Taiwan in this case, Avient’s integrated colorant and anti-UV solution is expected to provide 25 years of weathering resistant performance.

Home // Protecting Polymers from Microbe Growth To better evaluate how to protect plastic parts from microbial attack, Avient conducted a study to screen a variety of plastic substrates for susceptibility using American Society for Testing and Materials (ASTM) G21 (fungi susceptibility), Japanese Industrial Standard (JIS) Z2801, and modified ASTM E1428-15a (bacterial susceptibility) test standards.