PROXY STATEMENT 2023 | Annual Meeting of Shareholders 77 OUTSTANDING EQUITY AWARDS AT 2022 FISCAL YEAR-END Option Awards Stock Awards Grant Date Exercisable Unexercise- able (1) Unearned (1) Exercise Price Expiration Date Shares or Units of Stock that have not Vested (2) Market Value of Shares or Units of Stock that have not Vested Unearned Shares, Units or Other Rights that have not Vested (3) Market or Payout Value of Unearned Shares, Units or Other Rights that have not Vested 2/10/2020 — — — — — 59,071 1,994,237 — — 2/08/2021 — — — — — 46,178 1,558,969 — — 2/14/2022 — — — — — 39,116 1,320,556 — — 5/15/2014 — — — — — — — 58,845 1,986,607 2/14/2018 31,516 — — 41.89 2/14/2028 — — — — 2/11/2019 51,150 — — 31.54 2/11/2029 — — — — 2/10/2020 57,516 57,517 — 31.48 2/10/2030 — — — — 2/08/2021 59,233 118,467 — 42.27 2/08/2031 — — — — 2/14/2022 — — 134,700 52.64 2/14/2032 — — — — 8/24/2020 — — — — — 42,202 1,424,740 — — 2/08/2021 — — — — — 7,100 239,696 — — 2/14/2022 — — — — — 6,513 219,879 — — 2/08/2021 9,066 18,134 — 42.27 2/08/2031 — — — — 2/14/2022 — — 22,300 52.64 2/14/2032 — — — — 2/10/2020 — — — — — 6,764 228,353 — — 2/08/2021 — — — — — 5,274 178,050 — — 2/14/2022 — — — — — 4,667 157,558 — — 2/04/2015 9,200 — — 38.27 2/4/2025 — — — — 2/15/2017 13,250 — — 34.10 2/15/2027 — — — — 2/14/2018 11,050 — — 41.89 2/14/2028 — — — — 2/11/2019 18,200 — — 31.54 2/11/2029 — — — — 2/10/2020 13,100 6,550 — 31.48 2/10/2030 — — — — 2/08/2021 6,716 13,434 — 42.27 2/08/2031 — — — — 2/14/2022 — — 16,000 52.64 2/14/2032 — — — — 2/20/2020 — — — — — 7,302 246,516 — — 2/08/2021 — — — — — 5,639 190,373 — — 2/14/2022 — — — — — 5,282 178,320 — — 2/15/2017 12,100 — — 34.10 2/15/2027 — — — — 2/14/2018 11,500 — — 41.89 2/14/2028 — — — — 2/11/2019 19,250 — — 31.54 2/11/2029 — — — — 2/10/2020 14,133 7,067 — 31.48 2/10/2030 — — — — 2/08/2021 7,216 14,434 — 42.27 2/08/2031 — — — — 2/14/2022 — — 18,050 52.64 2/14/2032 — — — — 2/10/2020 — — — — — 6,605 222,985 — — 2/08/2021 — — — — — 5,274 178,050 — — 2/14/2022 — — — — — 4,667 157,558 — — 2/11/2014 2,400 — — 35.07 2/11/2024 — — — — 2/04/2015 2,500 — — 38.27 2/4/2025 — — — — 2/10/2016 10,400 — — 24.98 2/10/2026 — — — — 2/15/2017 10,100 — — 34.10 2/15/2027 — — — — 2/14/2018 10,400 — — 41.89 2/14/2028 — — — — 2/11/2019 17,150 — — 31.54 2/11/2029 — — — — 2/10/2020 12,800 6,400 — 31.48 2/10/2030 — — — — 2/08/2021 6,716 13,434 — 42.27 2/08/2031 — — — — 2/14/2022 — — 16,000 52.64 2/14/2032 — — — — (1) Amounts in these columns represent stock-settled SARs that vest in one-third increments, with each one-third increment vesting on the later of (a) the first, second and third anniversary of the grant date, respectively and (b) the achievement of a stock price hurdle (based on Avient’s closing stock price and sustained for thirty consecutive trading days) applicable to that increment. Each share is entitled to one vote. The PolyOne Corporation 2020 Equity and Incentive Compensation Plan was effective as of the Effective Date.

Styrene domain is stained black. The one with low molecular weight of SEBS is transparent and the one with high molecular weight SEBS is transclscent. Examples of typical DMA results are shown in Figure 2.

LIGHTING MANUFACTURER S T R E E T L I G H T A R M • Limit corrosion • Replace metal insert, maintaining strength • Black color • UV resistance, as used for an outdoor application • Electrical isolation • Utilized simulation services from Avient Design to optimize the product’s design for performance and processability • Achieved required ageing test with the support from R&D and ADTS • Replaced the need to use a metal insert, reducing part weight, cost and simplifying the production process OnForce Long Glass Fiber Reinforced Polypropylene Composites KEY REQUIREMENTS WHY AVIENT? AVIENT SOLUTION STRENGTH + UV RESISTANCE LEARN MORE © 2024 Avient Corporation, All Rights Reserved https://www.avient.com/products/long-fiber-technology/long-fiber-technologies/onforce-long-glass-fiber-reinforced-polypropylene-composites Lighting manufacturer

APPLICATION BULLETIN IMPROVED CHEMICAL RESISTANCE Engineered polyketone delivers excellent performance against aggressive chemicals, like H2SO4 for batteries (Figure 1), and performs similarly to nylon against typical chemicals tested in powersports, such as gasoline* (Figure 2). Concentrated Acid - 30% H2SO4, 24 HRS, 23°C Nylon samples were almost completely dissolved after one day, while the Edgetek PKE bars are still visible. Edgetek™ PKE Glass-Filled Portfolio Polyketone formulations with 20, 30, or 40% short glass fiber reinforcement available in natural or black Complēt™ PKE Portfolio Long fiber reinforced polyketone formulations with 30, 40, or 50% fiber loading and available in natural or black, and available in non-PFAS* formulations to achieve a UL 94 V-0 flame rating at 1.5 mm ET8900-0001 20GF NAT LGF30-PKE 1088 NAT ET8900-0002 30GF NAT LGF30-PKE 2020 BLK ET8900-0003 40GF NAT LGF40-PKE 1088 NAT ET8900-0004 20GF BLK LGF40-PKE 2020 BLK ET8900-0005 30GF BLK LGF50-PKE 1088 NAT ET8900-0006 40GF BLK LGF50-PKE 2020 BLK FEATURED PRODUCTS * Non-PFAS flame-retardant (FR) grades are manufactured without intentionally added PFAS-based raw materials.

WHITE UV HDPE V2 BLACK PHA V2 EL9760 NPT SUPER POLY PLUS WHITE

OnColor™ IR Sortable Black Infrared Sortable Black for Recyclable Packaging OnColor™ Infrared Sortable Black for Recyclable Packaging is a black colorant created without the addition of carbon black pigment. OnColor IR Sortable Black is available in a range of blacks, and can also be customized to support the needs of brand owners, allowing black packaging to remain an option for current products. In the presence of carbon black, currently used to color most black packaging, all the wavelengths are absorbed and black polymers can’t be identified, inevitably keeping black packaging out of recycling streams at considerable cost to our environment.

HealthCare Transportation 8% Textiles Target Page 85 • Trend toward more affordable housing favors our product 1.5 2.0 2.5 Housing Starts (in million units) 50 year average Market Dynamics • Ultimate housing recovery presents substantial upside to already record- setting results Source: Historical Data from the US Census Bureau, 2012 estimate is a PolyOne projection. 0.0 0.5 1.0 '87 '89 '91 '94 '96 '98 '00 '02 '04 '06 '08 '10 '12 Page 86 Value Proposition • Premier provider of specialized vinyl and supply chain solutions, leading the industry in innovation and service Transformation Highlights • Management upgrades ensure that each PP&S business Value Proposition and Transformation Highlights • Management upgrades ensure that each PP&S business maximizes performance • Asset realignment and Lean Six Sigma reduce costs • Strengthened relationship with winning customers • Increased differentiation in all business units > $12B Addressable Market Page 87 Key Differentiators • Providing application design, material design and / or process design assistance not available from competitors • Capability to improve joint value streams • We are the best innovator in our space • We are the best innovator in our space • Expanding customers’ opportunities by providing innovative materials and marketing ideas • We provide world-class customer service and delivery performance Page 88 13.7% 14.3% 15.5% 9.9% 6.2% 5.4% WC % of Sales • Best-in-class working capital management and delivery performance • Improved raw material Areas of Focus – Operational Excellence 89.1% 92.0% 94.2% 93.4% 93.4% 94.0% On-Time Delivery • Improved raw material positions, sourcing savings • PolyOne pilot site for many LSS and manufacturing excellence programs *As measured to customer request date * Page 89 • reFlexTM Bioplasticizers Applications: Wide variety of flexible vinyl-based products • GeonTM HC for Healthcare � Applications: Medical device housings, specialty tubing � Customer benefits: Withstand aggressive antiseptics Key Innovations � Applications: Wide variety of flexible vinyl-based products � Customer benefits: Lower carbon footprint, improved productivity • GeonTM SF Super Flow � Applications: Large appliance parts, molded siding panels � Customer benefits: Flame retardancy, detergent resistance Page 90 Critical Imperatives and 2015 Goal Critical Imperatives • Accelerate innovation - grow in new applications not historically served with vinyl • Drive continuous improvement in manufacturing and working capital efficienciesworking capital efficiencies • Selectively leverage construction recovery 2015 Goal • 9 - 12% return on sales Page 91 Page 92

320UGNSPL PANTONE(R) 320 U SIMULATION LT BROWN W/UV BROWN UV DMH22

A laser beam is directed onto two plastic parts, one that is transparent to the laser energy and one that absorbs the energy. Solutions are available for the laser welding of transparent/black, transparent/color, color/color, and black/black parts.

FB443 BLACK V558 BLACK NR