X ET TR-354651A HIGH GLOSS GREEN X ET TR-354651C High Gloss Red X ET TR-354651G High Gloss Gray

Avient reflects 2023 adjusted EBITDA guidance of $500M and estimated run-rate CAPEX of $110M. 2023E (%) 27 78 89 83 80 78 74 86 79 76 67 66 55 50 (39) A vi en t K W R FU L P P G A V Y R P M FM 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 MULTIPLE EXPANSION Source: Peer data per Bloomberg as of December 29, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $500M and closing share price of $41.57. Avient 2011, 2018 and 2021 multiples reflect trailing 12 months EBITDA at December 31. 28 EV / 2023E EBITDA 6.5 8.5 11.0 10.8 16.1 15.5 14.1 14.0 10.3 21.0 19.0 14.3 12.1 11.8 11.7 11.5 9.7 20 11 20 18 20 21 20 23 R P M A V Y P P G K W R FU L E C L H X L S C L C E FM C A S H H U N E M N Avient Historic Multiple Avient Specialty Formulators Other Specialty / Chemical Companies A P P E N D I X 30 Performance Additives 16% Pigments 12% TiO2 10% Dyestuffs 2% Polyethylene 11% Nylon 6% Polypropylene 5% Styrenic Block Copolymer 5% Other Raw Materials 33% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials 2022 pro forma results for the acquisition of Avient Protective Materials RA W MATERIAL BASKET SEGMENT DATA U.S. & Canada 40% EMEA 37% Asia 18% Latin America 5% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 20% Packaging 24% Industrial 15% Building and Construction 10% Telecommunications 4% Energy 4% Defense 6% END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) Transportation 9% Healthcare 8% 32 (1) Total company sales and adjusted EBITDA of $3,653M and $592M, respectively, include intercompany sales eliminations and corporate costs 2 0 2 2 R E V E N U E | $ 2 . 4 B I L L I O N US & Canada 34% EMEA 38% Asia 20% Latin America 8% END MARKET REGION 33 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 8% Building & Construction 11% Telecommunications 1% Energy 2% COLOR, ADDITIVES & INKS 2 0 2 2 P R O F O R M A R E V E N U E | $ 1 . 3 B I L L I O N US & Canada 52% EMEA 35% Asia 13% 34 Packaging 5% Consumer 19% Healthcare 8%Industrial 16% Transportation 10% Telecommunications 10% Energy 9% Defense 15% Building & Construction 8% END MARKET REGION SPECIALTY ENGINEERED MATERIALS Packaging 32% Consumer 27% Healthcare 8% Industrial 14% Building & Construction 5% Telecommunications 3% Energy 1% Defense 1% Asia (18% of sales) Transportation 9% 2 0 2 2 P R O F O R M A AV I E N T R E G I O N A L S A L E S Packaging 27% Consumer 14% Healthcare 5% Industrial 17% Building & Construction 10% Energy 5% Defense 8% EMEA (37% of sales)Transportation 11% Packaging 13% Consumer 24% Healthcare 12% Industrial 15% Building & Construction 13% Energy 5% Defense 5% US & Canada (40% of sales) Transportation 7% Packaging 56% Consumer 23% Healthcare 4% Industrial 7% Building & Construction 4% Telecommunications 1% LATAM (5% of sales) Transportation 5% Telecommunications 3% Telecommunications 6% 35 B Y E N D M A R K E T Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results. Senior management believes the measures described above are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

AU TO M OT I V E A F T E R M A R K E T M A N U FAC T U R E R S T O R A G E B O X L A T C H • Low coefficient of friction (CoF) to allow for ease-of-use • Colorable to a brand-specified Pantone color • Low odor in the end product • Maintain performance when exposed to outdoor elements and extreme temperatures • Offered lubricious polyketone (PK) material to facilitate easy slide and effective latching • Provided excellent chemical resistance to cleaning and harsh chemicals, such as bleach, isopropyl alcohol and automotive fluids • Formulated a durable material with abrasion resistance, UV stability, and tolerant of temperatures from 0°-140°F • Delivered surety of supply vs. incumbent material LubriOne™ PKE Polyketone Formulations KEY REQUIREMENTS WHY AVIENT?

Seat Ventilation Tube Case Study Snapshot L E A D I N G LU X U RY C A R M A N U FAC T U R E R S E A T V E N T I L A T I O N T U B E • Reliable sealing performance • Good bonding ASA+PBT • Excellent chemical resistance and good flexibility • Provided a TPE with good flexibility to maintain a tight seal within the ventilation system, preventing air leaks and ensuring efficient airflow • Formulated a durable and chemically resistant grade to help withstand the various stresses and environmental conditions that the ducts may encounter • Offered quick technical support to fix the leak problem for customer Versaflex Thermoplastic Elastomers KEY REQUIREMENTS WHY AVIENT?

© 2019, All Right Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 LED LIGHT MANUFACTURER H E A T E X C H A N G E R F O R A N E L E C T R O N I C C I R C U I T B O A R D • Looking to replace aluminum • Reduce corrosion • Light weighting • Eliminated the effects of corrosion • Provided a lightweight alternative to aluminium • Redesigned the part for easier processing and further weight reduction • Enabled the customer to take a new, innovative product in to the market Therma-Tech™ Thermally Conductive Formulation KEY REQUIREMENTS WHY AVIENT?

© 2019, All Right Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 B U I L D I N G A N D C O N S T R U C T I O N S U P P L I E R H E A T E X C H A N G E R : G A S R E C O V E R Y • Resistance to corrosion and fouling • Good thermal conductivity • Good pressure resistance • Compatible with current processing methods – extrusion • Eliminated the effects of corrosion and fouling by replacing aluminum • Improved thermal performance over time • Developed a customized solution that utilized the customers existing extrusion processing methods Therma-Tech™ Thermally Conductive Formulation KEY REQUIREMENTS WHY AVIENT?

M E D I C A L E Q U I P M E N T M A N U FA C T U R E R S U R G I C A L X - R A Y G L A S S E S • Replace lead while providing uniform shielding performance • Radiation shielding up to 140KeV • Improve glasses design • Compliance with Radiation Protection Regulation: Adult eye exposure must be below 20 mSv per calendar year • Conducted extensive testing to ensure comparable and uniform shielding performance • Improved geometric flexibility • Lowered shielding component costs 30-50% by eliminating machining and assembly steps (associated with lead) • Reduced weight of the glasses and enabled a more ergonomic design • Eliminated disposal concerns associated with lead Trilliant™ XR Lead Replacement Thermoplastics KEY REQUIREMENTS WHY AVIENT?

Trilliant XR - CT and MRI Scanners M E D I C A L D E V I C E M A N U FAC T U R E R M R I A N D C T S C A N N E R S • Uniform shielding with no “hot spots” • X-ray shielding up to 140 KeV • Meet European Union’s Restriction of Hazardous Substances (RoHS) future compliance requirements • Provided a lead alternative solution that delivered improved geometric flexibility for more uniform radiation shielding • Lowered shielding component costs 30-50% by eliminating machining and assembly steps Trilliant™ XR Lead Replacement Thermoplastics KEY REQUIREMENTS WHY AVIENT?

Biodegradable & compostable BIO FILM BAG MANUFACTURER F L E X I B L E P L A F I L M • Easy film unwinding without optical impairments or mechanical damage • Excellent clarity and transparency in BOPLA applications • Compliant with food contact applications* • Provided a solution to minimize film-to-film surface contact, decreasing the coefficient of friction between layers lying on top of each other • Created a customized formulation by mixing anti- blocking additives and slip agents, maintaining process speed without impacting performance or film quality • Improved handling of the PLA shopping bags, making them easier to open CESA™ & OnCap™ BIO ABSL additives KEY REQUIREMENTS WHY AVIENT?

W A X M A T ® G R I P T A P E • Provide alternative material to traditional wax and EVA foam for grip on surfboards • Translucent appearance • Coextrude with polypropylene (PP) film • Excellent UV resistance • Customized formulation for exceptional hydrophobic grip and non-abrasive finish • Incorporated specialty additives to enhance UV resistance and inhibit mold growth • Solved technical processing challenges to achieve efficient coextrusion of materials and achieve optimal bonding to adhesive backing • Enabled customer to achieve market differentiation and expand into new markets and applications Custom GLS™ TPE Wet Grip Formulation KEY REQUIREMENTS WHY AVIENT?