VERSAFLEX(TM) VDT 5110-50N AMOSORB SOLO 2-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Versaflex HC1100-60 clear EU X NM 27604-00004-1 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

X PPR-40G F-3/2-1 VERSAFLEX(TM) GP 2810-60N US Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

The company noted that GAAP EPS includes special items (Attachment 3) and intangible amortization expense (Attachment 1). https://www.avient.com/news 4 Pro Forma for Acquisition of Avient Protective Materials business (APM) On September 1, 2022, the company acquired DSM’s Protective Materials business, the foundation of which is the renowned technology and globally admired brand of Dyneema®, the World’s Strongest Fiber™. # # 7 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

AVNT-2022.06.30-News Release 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Second Quarter 2022 Results • Second quarter sales grew to $1.3 billion, a 5% increase over the prior year quarter, and an all-time quarterly record • GAAP EPS increased 24% to $0.92 compared to $0.74 in the prior year quarter • Adjusted EPS increased 13% to $0.98 compared to $0.87 in the prior year quarter, exceeding second quarter guidance of $0.92. # # Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G. Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 6 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Sales $ 1,302.4 $ 1,235.2 $ 2,596.2 $ 2,397.5 Operating Income 129.5 108.1 258.1 228.5 Net income attributable to Avient shareholders 84.7 68.8 168.9 148.1 Basic earnings per share attributable to Avient shareholders $ 0.93 $ 0.75 $ 1.85 $ 1.62 Diluted earnings per share attributable to Avient shareholders $ 0.92 $ 0.74 $ 1.83 $ 1.60 Senior management uses comparisons of adjusted net income attributable to Avient shareholders and diluted adjusted earnings per share (EPS) attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

Learn how Versaflex™ Soft-Touch Thermoplastic Elastomers enhanced accuracy and comfort while maintaining grip design for archery bow Liquid CFAs provide a top tier-1 molder with a consistent solution

Versaflex™ VDT Vibration Damping TPE for Overmolding enables manufacturers of consumer electronics, power tools, sporting goods and appliances to add comfort and resilience to their products, providing a better end-user experience. Media contact Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

Learn how Versaflex™ Soft-Touch Thermoplastic Elastomers enhanced accuracy and comfort while maintaining grip design for archery bow Liquid CFAs provide a top tier-1 molder with a consistent solution

Vibration Damping Technologies: Versaflex™ VDT thermoplastic elastomers reduce appliance vibration and ‘walking’ when used in anti-vibration feet for top load washing machines, and can be overmolded to help eliminate secondary processes and reduce cycle time Michelle Maniscalco Senior Manager, Marketing Communications PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

GLS™ Versaflex™ HC Thermoplastic Elastomer: •    Gives OEMs the design freedom to make their own syringe stoppers and improve manufacturing processes versus traditional thermoset rubber stoppers •    Simple, one-step injection molding process versus multiple steps with thermoset rubber  •    Streamlines production while increasing margins and profitability Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com