The quantity was determined to be de minimis and not material relative to the overall inventory and does not affect the verification conclusion.

These colorants are designed for a wide variety of applications, in line with RAL, IEC 304, BS 6746C and AFNOR (Association Française de Normalisation) color requirements.

Dominic Townsend, President Effective Date: 22 March 2024 Expiration Date: 28 February 2025 Revision Date: 22 March 2024 Avient Corporation - Lomas de Zamora, Argentina AV . Dominic Townsend, President Effective Date: 22 March 2024 Expiration Date: 28 February 2025 Revision Date: 22 March 2024 Avient Corporation - Santa Clara, Mexico Plásticos 28 int B102 Santa Clara Coatitla, Ecatepec de Morelos, Estado de México 55540 México Design and Manufacture of Colorants and Additives for Plastics 65536-117323Certificate No: Page 43 of 53 ABS Quality Evaluations ABS Quality Evaluations, Inc. 1701 City Plaza Drive, Spring, TX 77389, U.S.A. Toluca 2000 Toluca, Estado de México 50233 México Design and Manufacture of Colorants and Additives for Plastics 65536-74672Certificate No: Page 50 of 53 ABS Quality Evaluations ABS Quality Evaluations, Inc. 1701 City Plaza Drive, Spring, TX 77389, U.S.A.

All Rights Reserved 2025 12 Disciplined capital allocation PRIORITIZATION AND PHILOSHOPY Capex Expected annual spend between 3-5% of revenue to support investment in organic growth M&A De-emphasized in near term; complement organic growth strategy with M&A over time, as needed 1 2 Dividends Increasing each year with underlying earnings growth 3 Debt pay down Target net debt to adjusted EBITDA less than 2.5x 4 Share repurchases Opportunistic buy backs 5 1 Copyright © . EPS – Q2 2025 $0.79 2025 financial guidance unchanged... ▲ U.S. consumer sentiment and GDP growth stays robust ▲ China trade war and tariffs de-escalate ▲ European economy improves due to increased infrastructure spend ▲ Continued strength in defense and healthcare markets ▼ Global trade uncertainty / volatility ▼ Persistent inflation and slowdown in global economies ▼ Supply chain disruptions resulting from global trade policy changes ▼ FX volatility ACCELERATORS DECELERATORS 24Copyright © .

See Attachment 3 for a definition and summary of special items and Attachment 7 for a summary of pro forma adjustments associated with the APM Acquisition.

Francisco Nakasato, 1700 13295-000 Itupeva Sao Paulo, Brazil โทรศัพท์: +55 11 4593 9200 ยุโรป Regional Headquarters Pommerloch, Luxembourg 19 Route de Bastogne Pommerloch, Luxembourg, L-9638 โทรศัพท์: +352 269 050 35 โทรสาร +352 269 050 45 www.avient.com http://www.avient.com

Director since: 2018 Age: 69 Current Public Company Directorships: • Haemonetics Corporation Former Directorships: • Halyard Health, Inc. • RadioShack Corp. • Lubrizol Corp. • Kimberly-Clark de Mexico Richard H. Pro forma means target’s prior year results corresponding to remaining time left in the performance period, adjusted for purchase accounting and acquisition financing, if any. A-1 Year Ended December 31, 2022 Reconciliation of Pro Forma Adjusted Earnings per Share Net income from continuing operations attributable to Avient shareholders $ 82.8 Special items, after tax 116.2 Amortization expense, after-tax 49.0 Adjusted net income from continuing operations excluding special items 248.0 APM pro forma adjustments to net income from continuing operations* 13.6 APM amortization expense, after tax* 19.1 Pro forma adjusted net income from continuing operations attributable to Avient shareholders $ 280.7 Weighted average diluted shares 92.2 Pro forma adjusted EPS - excluding special items $ 3.04 (*) Pro forma adjustment for 2022 is for the 8 months January - August 2022 APM results (period before Avient ownership) including the impacts of debt financing and prepayments on net income from continuing operations.

Lomas de Zamora, Argentina 44. North / Central America South America Europe Middle East/ Asia Africa Australia/ Oceania Antigua & Barbuda Argentina Aland Islands Georgia Poland Afghanistan Laos Tajikistan Algeria Namibia Australia Canada Belize Albania Germany Portugal Azerbaijan Lebanon Thailand Angola Nigeria Fiji Costa Rica Bolivia Armenia Greece Romania Bahrain Malaysia Turkey Botswana Senegal French Polynesia Dominican Republic Brazil Austria Hungary San Marino Bangladesh Maldives Turkmenistan Egypt South Africa Guam El Salvador Chile Belarus Iceland Serbia Cambodia Myanmar United Arab Emir. While conventional air emissions are a critical and a highly- influential topic in some industrial sectors, as a specialty formulator of purchased materials, Avient’s conventional air emission levels from legacy operations are de minimis and not material.

In certain cases throughout this presentation, we have presented GAAP and non-GAAP financial measures adjusted to reflect full- year 2012 Pro forma results, including Spartech and Glasforms and excluding discontinued operations. • PolyOne’s chief operating decision makers use these financial measures to monitor and evaluate the ongoing performance of the Company and each business segment and to allocate resources.

Hiformer™ Liquid Masterbatches forneceram opções de matéria-prima alinhadas com os padrões brasileiros de embalagens farmacêuticas ColorMatrix™ Triple A™ Acetaldehyde Scavenger for PET reduziu o impacto da geração de acetaldeído (AA) devido ao aumento de calor no processamento de alto rendimento. Centros de design e tecnologia ColorWorks™ – São Paulo entregou mais de 20 cores personalizadas e aprovadas, utilizando o conhecimento do mercado e das tendências.