AVIENT CORPORATION S E C O N D Q U A R T E R 2 0 2 3 R E S U L T S (NYSE: AVNT) J U L Y 2 7 , 2 0 2 3 D I S C L A I M E R Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. GUIDANCE ( T O TA L C O M PA N Y ) 7 $845 $824 Guidance Actual $130 $131 Guidance Actual Sales Adjusted EBITDA (in millions) $0.60 $0.63 Guidance Actual Adjusted EPS (in millions) Q2 2023 PERFORMANCE VS. Avient reflects 2023 adjusted EBITDA guidance of $525M and estimated run-rate CAPEX of $110M. 2023E (%) 23 79 90 84 83 76 73 88 82 77 74 72 67 57 20 A vi e n t K W R P P G F U L A V Y R P M F M C C E H X L E C L A S H H U N E M N S C L Avient Specialty Formulators Other Specialty / Chemical Companies MULTI PL E EX PANSION Source: Peer data per Bloomberg as of July 21, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $525M and closing share price of $40.93.

SC-29040 T GREEN SC-29040 T GRAY PP FR 8-6 LMS-1000

PA6 GRADES RESIN TYPE GLASS FILLER Nymax/Bergamid (Prime Nylon) Nymax REC (Recycled Nylon) Unfilled 10%–60% Standard Grade ✔ ✔ ✔ ✔ Heat Stabilized Grades ✔ ✔ ✔ ✔ Mineral Reinforced Grades ✔ — ✔ ✔ Mineral/Glass Hybrids ✔ ✔ ✔ ✔ Flame Retardant Portfolio — — — — V0 ✔ — ✔ ✔ V2 ✔ — ✔ ✔ Impact Modified Grades ✔ ✔ ✔ ✔ UV Stabilized ✔ ✔ ✔ ✔ PA66 GRADES RESIN TYPE GLASS FILLER Standard Grade ✔ ✔ ✔ ✔ Heat Stabilized Grades ✔ ✔ ✔ ✔ Mineral Reinforced Grades ✔ — ✔ ✔ Mineral/Glass Hybrids ✔ — ✔ ✔ Flame Retardant Portfolio — — — — V0 ✔ — ✔ ✔ V2 ✔ — ✔ ✔ Impact Modified Grades ✔ ✔ ✔ ✔ UV Stabilized ✔ ✔ ✔ ✔ To learn more about our PA6 and PA66 solutions, contact Avient at +1.844.4AVIENT (1.844.428.4368).

Consistent pricing: Raw materials for the FR composite panel (core, laminate, FR components, etc.) are readily available and are rather stable in terms of price. We kept these exact pain points in mind when designing Hammerhead FR panels. FR COMPOSITE PANELS CASE STUDY What does success look like with our new Hammerhead FR flame retardant composite panels?

CH740232FPMB BLACK BLACK PP FR 8-6 LMS-1000

WHITE DENSIFIER XF BLACK STREAK PP FR 8-6 LMS-1000

RE S P IRATORY DE VICE MANUFACT URE R C P A P M A C H I N E C O V E R • Good aesthetics with high COF for grip functionality • Chemically bondable to FR PC/ABS down to 1mm • NCS S 9000-N color suitable for UV laser marking to white • Good scratch and mar resistance • Good chemical resistance to detergents, alcohols and bleach • Pass VOCs & out-gassing in accordance to ISO 18562-3/2:2017 • Customized formulation to balance mar resistance, flow, and laser marking whiteness and clarity • Collaborated on tooling improvements to widen processing window and increase yield rate • Provided application development and on- site technical support to manage short shot, sink marks, burn marks and air trap Customized VersaflexTM TPEs WHY AVIENT?

PA6 G30 H black UV 70 X ET 23933-3 Select Comfort Gray- FR 3% PP FR 8-6 LMS-1000

T/METERS T/INCH T/INCH

AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) A U G U S T 2 0 2 3 D I S C L A I M E R Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. W H AT W E D O : W E A R E A F O R M UL ATO R 6 CUSTOM FORMULATION J U LY 2 7 , 2 0 2 3 W E B C A S T P R E S E N TA T I O N COMPOSI TES PORTF OL IO D Y N E E M A ® E X P A N D S O U R E N G I N E E R E D F I B E R S A N D P A N E L S T E C H N O L O G Y LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers 8 DEFENSE TELECOMMUNICATIONS ENERGY TRANSPORTATION Military • Law Enforcement First Responders Body Armor • Helmets Vehicle Protection Sustainable Infrastructure Offshore Wind Electrical Grid Protection EV Battery Components Commercial Laminates Body & Trim • Air Cargo and Railroad Car Panels 5G Applications Fiber Optic Cables Satellite Communications Connectors and Components 9 COMPOSI TES SERVE D IV ER SIF IED END MAR KETS INDUSTRIAL Lifting Slings • Aquaculture High Pressure Pipe Conveyer Springs Q 2 P E R F O R M A N C E Q2 2023 PERFORMANCE VS. Avient reflects 2023 adjusted EBITDA guidance of $525M and estimated run-rate CAPEX of $110M. 2023E (%) 27 79 89 83 83 78 75 90 81 76 72 68 63 53 11 A vi e n t K W R F U L P P G A V Y R P M F M C C E E C L A S H H X L H U N E M N S C L Avient Specialty Formulators Other Specialty / Chemical Companies MULTI PL E EX PANSION Source: Peer data per Bloomberg as of August 17, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $525M and closing share price of $37.07.