Full Year Comparisons Pro Forma for Acquisition of Clariant’s Color Business The company acquired Clariant’s color (“Clariant Color”) business on July 1, 2020 (the “Acquisition Date”). To participate in the audio-only portion of the call, dial 1-844-835- 7433 (domestic) or 1-914-495-8589 (international) and provide conference ID number 2171339. To access, dial 1-855-859-2056 (domestic) or 1-404-537-3406 (international) and provide conference ID number 2171339.

Microsoft PowerPoint - Avient March IR - Fermium AVIENT CORPORATION (NYSE: AVNT) M A R C H 1 8 , 2 0 2 1 I R M E E T I N G S H O S T E D B Y F E R M I U M R E S E A R C H DISCLAIMER 2 Forward-Looking Statements In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. We are Avient. 4 BETTER TOGETHER: POLYONE AND CLARIANT MASTERBATCH Key Financial Data (1) 2021E Sales $4.1 billion 2021E EBITDA $510 million 2021E Free Cash Flow $250 million 87% of EBITDA from specialty applications (1) As of February 9, 2021 webcast Innovation is the lifeblood of a specialty company. Our free cash flow supports shareholder value creation through investing in R&D for organic growth, completing bolt-on acquisitions, and returning cash to shareholders via our dividend program and opportunistic share repurchases. 25 1.

Carbon Footprint Infographic Downstream COMMON TERMINOLOGY Carbon Dioxide Equivalent (CO2e): A common way to measure and report greenhouse gas (GHG) emissions such as carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulphur hexafluoride (SF6) Emission Standards: The classification of emissions across the supply chain Scope 1: Direct emissions from sources that are owned or controlled by an organization (e.g., company-owned vehicles, process emissions, and on-site heating) Scope 2: Indirect emissions from purchased indirect sources, such as the production of electricity and steam for an organization’s use Scope 3: Indirect emissions from sources up and down the supply chain, including materials, transportation of goods, and the processing, use, and end-of-life treatment of sold products Cradle-to-Gate: Carbon impact of a product from raw materials and product manufacturing Cradle-to-Grave: Carbon impact and analysis across the entire life cycle of a product from raw materials to disposal © 2023 Avient • www.avient.com • 1.844.4AVIENT Raw Materials Supply Chain UNDERSTANDING CARBON FOOTPRINT CO2e Transportation End-of-Life Treatment Processing of Goods Use of Products Transportation Chemical Processing Cradle-to-Gate (B2B) Cradle-to-Grave (B2C) SCOPE 3 INDIRECT SCOPE 3 INDIRECT Electricity Steam Company Facilities Company-Owned Vehicles SCOPE 1 DIRECT SCOPE 2 INDIRECT Reporting CompanyUpstream

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ZWOLSEWEG 1, 2994 LB, BARENDRECHT, NETHERLANDS. ACCREDITED UNIT: DNV GL Business Assurance B.V., ZWOLSEWEG 1, 2994 LB, BARENDRECHT, NETHERLANDS.

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TEMPERATURE Material Rear Center Front Nozzle Melt Mold Nylon 6,6 540–570 530–560 530–560 540–570 540–570 200–300 (90–150) Nylon 6,6 30% SS 540–570 530–560 530–560 540–570 540–570 200–300 (90–150) PBT 510–410 (265–280) 490–540 (255–280) 480–530 480–530 480–530 150–250 (65–120) PC 14% NiCF 540–570 540–570 530–560 530–560 530–560 150–250 (65–120) ABS 470–520 460–520 460–520 460–530 (240–275) 460–530 (240–275) 100–200 (40–90) PP 440–480 (225–250) 440–480 (225–250) 430–470 (220–245) 420–460 (215–240) 420–460 (215–240) 125–175 (50–80) DRYING Material Temperature °F (°C) Time Minimum Moisture Maximum Moisture Nylon 6,6 14% NiCF 180 (80) 4–5 hours 0.05% 0.20% Nylon 6,6 30% SS 180 (80) 4–5 hours 0.05% 0.20% PBT 14% NiCF 250 (120) 6-8 hours 0.02% 0.03% PC 14% NiCF 250 (120) 3–4 hours 0.02% 0.02% ABS 14% NiCF 200 (90) 2–4 hours 0.05% 0.10% PP 14% NiCF 180 (80) 2–4 hours 0.20% 0.30% Equipment • Feed throats smaller than 2.5" may cause bridging due to pellet size - Larger feed throats will be more advantageous with long fiber EMI shielding resins • General purpose metering screw is recommended - Mixing/barrier screws are not recommended • L/D ratio - 18:1–20:1 (40% feed, 40% transition, 20% metering) • Low compression ratio - 2:1–3:1 • Deep flights recommended - Metering zone 3.5 mm - Feed zone 7.5 mm • Check ring - Three-piece, free-flowing check ring • General purpose nozzle (large nozzle tips are recommended) - Minimum orifice diameter of 7/32" - Tapered nozzles are not recommended for long fiber EMI shielding resins • Clamp tonnage: - 2.5–5 tons/in2 Gates • Large, free-flow gating recommended - 0.25" x 0.125" land length - 0.5" gate depth Runners • Full round gate design • No sharp corners • Minimum of 0.25" diameter • Hot runners can be used PROCESSING Screw Speed Slower screw speeds are recommended to protect fiber length Back Pressure Lower back pressure is recommended to protect fiber length Pack Pressure 60–80% of max injection pressure Hold Pressure 40–60% of max injection pressure Cool Time 10–30 seconds (depends on part geometry and dimensional stability) PROCESS CONSIDERATIONS Recommended – retain fiber length (maximize conductivity) • Low shear process • Low screw speed and screw RPM • Slow Injection speed • Fill to 99–100% on first stage of injection - Reduces potential nesting of fibers at gate location - Improves mechanical performance near gate location - Promotes ideal fiber orientation Resin Rich Surface • Achieved when using a hot mold temperature and longer cure times ≥ Max mold temperature recommendation • Improved surface aesthetic • Reduced surface conductivity • Could reduce attenuation performance in an assembly Fiber Rich Surface • Achieved when using a cold mold temperature and shorter cure times ≤ Minimum mold temperature recommendation • Improved surface aesthetic • Reduced surface conductivity • Could improve attenuation performance in an assembly www.avient.com Copyright © 2020, Avient Corporation.

Cotrep AT 20-21_AVIENT CORPORATION_CESA® IR PE 94000828 AT 20-21 1 Avis Technique – Tri Détectabilité et tri de la solution colorante AVIENT CORPORATION / CESA® IR PE 94000828 dans les centres de tri ES C R IP TI O N D E LA D EM A N E GENERALITES Demandeur Avient Corporation Date de la demande 2020 Référence de la solution colorante CESA® IR PE 94000828 Limite max de concentration de la solution colorante 4% DESCRIPTION DE LA SOLUTION COLORANTE Couleur Noire Solution colorante adaptée pour : Emballages rigides en PP OBJET DE LA DEMANDE Etude de la détectabilité dans les centres de tri français de la solution colorante noire CESA® IR PE 94000828 proposée par Avient Corporation et utilisée pour colorer des emballages rigides en PP. D’une part, l’entreprise Avient Corporation s’est engagée à : - utiliser le protocole de tri fournis par le COTREP (« Procédure de tests de tri optique COTREP pour évaluer la détectabilité d’emballages sombres lors des étapes de tri optique » - version Janvier 20191) ; - réaliser les tests chez les deux Fabricants T.O. représentatifs des capacités de tri existantes en France ; - remettre au COTREP les rapports des essais pour analyse et avis ; - proposer une solution colorante : o qui réponde aux exigences essentielles de la directive emballage 94/62/CE o qui ne fait pas basculer la densité de l’emballage : les emballages majoritairement en PP ou PE doivent conserver une densité < 1 et les emballages majoritairement en PET ou en PS une densité > 1. À Paris, le 17 juillet 2020 1 Disponible sur le site du COTREP : https://www.cotrep.fr/content/uploads/sites/3/2019/02/tri-p1-emballages-sombres-v01-2019.pdf

AT 20-20 1 Avis Technique – Tri Détectabilité et tri de la solution colorante AVIENT CORPORATION / CESA® IR PP 94000721dans les centres de tri S C R IP TI O N D L A D M A N GENERALITES Demandeur Avient Corporation Date de la demande 2020 Référence de la solution colorante CESA® IR PP 94000721 Limite max de concentration de la solution colorante 4% DESCRIPTION DE LA SOLUTION COLORANTE Couleur Noire Solution colorante adaptée pour : Emballages rigides en PP OBJET DE LA DEMANDE Etude de la détectabilité dans les centres de tri français de la solution colorante noire CESA® IR PP 94000721proposée par Avient Corporation et utilisée pour colorer des emballages rigides en PP. D’une part, l’entreprise Avient Corporation s’est engagée à : - utiliser le protocole de tri fournis par le COTREP (« Procédure de tests de tri optique COTREP pour évaluer la détectabilité d’emballages sombres lors des étapes de tri optique » - version Janvier 20191) ; - réaliser les tests chez les deux Fabricants T.O. représentatifs des capacités de tri existantes en France ; - remettre au COTREP les rapports des essais pour analyse et avis ; - proposer une solution colorante : o qui réponde aux exigences essentielles de la directive emballage 94/62/CE o qui ne fait pas basculer la densité de l’emballage : les emballages majoritairement en PP ou PE doivent conserver une densité < 1 et les emballages majoritairement en PET ou en PS une densité > 1. À Paris, le 17 juillet 2020 1 Disponible sur le site du COTREP : https://www.cotrep.fr/content/uploads/sites/3/2019/02/tri-p1-emballages-sombres-v01-2019.pdf https://www.cotrep.fr/content/uploads/sites/3/2019/02/tri-p1-emballages-sombres-v01-2019.pdf

BASE RESIN ABS Drying Temperature 80–90°C Drying Time 2–3 Hours Barrel Temperatures °C Rear Zone 180–210 Center Zone 190–220 Front Zone 200–230 Nozzle 210–240 Mold Temperature 50–80 Screw Speed Moderate Back Pressure 3–10 bar Cushion 5–15 mm Injection Speed Low to medium Injection Pressure Moderate to high Holding Pressure 10–30% of injection pressure Screw Type General purpose Screw L/D 20:1 Screw Compression Ratio 2.0:1–2.5:1 Non-return Check Valve Free flow check ring Nozzle Type Reverse taper Barrel Capacity 30–80% of barrel should be used STARTUP & SHUTDOWN RECOMMENDATIONS Purge Compound 2–3 melt flow PP or purging compound. Draft Angle • Maintain a minimum draft angle of 1° per side.