FX +4.6% FX -1.5% Total Avient +3.1% Note: Regional Sales Percentages exclude impact of foreign exchange Q2 2024 SEGMENT PERFORMANCE (COLOR, ADDITIVES & INKS) $525 $542 Q2 23 Q2 24 $94 $108 Q2 23 Q2 24 19.9% Sales Adjusted EBITDA (in millions) (in millions) Sales Adjusted EBITDA 7 17.9% +200 bps * * * Adjusted EBITDA Margin % • Organic sales growth in all regions led by Americas • Raw material deflation combined with cost reduction actions drove EBITDA margin expansion + 3% (+5% excluding FX) + 15% (+17% excluding FX) Q2 2024 SEGMENT PERFORMANCE (SPECIALTY ENGINEERED MATERIALS) $301 $308 Q2 23 Q2 24 $60 $64 Q2 23 Q2 24 20.6% Sales Adjusted EBITDA (in millions) (in millions) Sales Adjusted EBITDA 8 19.8% +80 bps * * * Adjusted EBITDA Margin % • Sales growth in consumer, healthcare and building & construction end markets offset by weaker demand in telecommunications • EBITDA margin expansion driven by positive end market mix as well as raw material deflation + 2% (+4% excluding FX) + 7% (+8% excluding FX) 2024 G U IDA N CE FY 2024 GUIDANCE Previous (May 7) Current Adjusted EBITDA $510 to $535 million $515 to $540 million Adjusted EPS $2.50 to $2.65 $2.55 to $2.70 Interest Expense $105 million $105 million Adjusted Effective Tax Rate 23% to 25% 23% to 25% Capital Expenditures ~$140 million ~$140 million 10 Q3 2024: Adjusted EPS of $0.62 11 Highlights • Provides performance updates on 2030 Sustainability Goals • Reduced company’s Scope 1 & 2 GHG emissions by 48% since 2019 • Highlights ESG performance ratings, certifications, and awards, including recent upgrades by Ecovadis to Gold and CDP to A- • Reflects Great Place to Work® culture focused on health, safety and employee engagement 2023 SUSTAINABILITY REPORT 11 Sustainability for a Better Tomorrow 2023 SUSTAINABILITY REPORT 12 • Investor Day to be held December 4, 2024 in New York, NY • The focus will be to do a deep dive on the Company’s strategy • Further details to be communicated 2024 AVIENT INVESTOR DAY AP P EN D IX 15 Performance Additives 15% Pigments 13% TiO2 9% Dyestuffs 2% Polyethylene 10%Nylon 5% Polypropylene 4% Styrenic Block Copolymer 4% Other Raw Materials 38% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials RAW MATERIAL BASKET SEGMENT DATA U.S. & Canada 41% EMEA 36% Asia 18% Latin America 5% 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Consumer 19% Packaging 23%Industrial 16% Building and Construction 9% Telecommunications 4% Energy 5% Defense 7% END MARKET REVENUE $2,007M $358M $1,138M $224M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $502M$3,143M (1) Transportation 10% Healthcare 7% 17 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2023 REVENUE | $2 .0 B ILL ION US & Canada 34% EMEA 37% Asia 21% Latin America 8% END MARKET REGION 18 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 9% Building & Construction 10% Telecommunications 1% Energy 2% COLOR, ADDITIVES & INKS 2023 REVENUE | $1 .1 B ILL ION US & Canada 52% EMEA 35% Asia 13% 19 Packaging 5% Consumer 16% Healthcare 6%Industrial 16% Transportation 12% Telecommunications 9% Energy 10% Defense 18% Building & Construction 8% END MARKET REGION SPECIALTY ENGINEERED MATERIALS Packaging 32% Consumer 26% Healthcare 9% Industrial 13% Building & Construction 6% Telecommunications 2% Energy 2% Defense 1% Asia (18% of sales) Transportation 9% 2023 AVIENT REGIONAL SALES Packaging 25% Consumer 13% Healthcare 5% Industrial 18% Building & Construction 9% Energy 5% Defense 8% EMEA (36% of sales)Transportation 13% Packaging 13% Consumer 22% Healthcare 10% Industrial 16% Building & Construction 12% Energy 6% Defense 8% US & Canada (41% of sales) Transportation 9% Packaging 59% Consumer 22% Healthcare 2% Industrial 8% Building & Construction 4% LATAM (5% of sales) Transportation 5% Telecommunications 4% Telecommunications 4% 20 BY END MARKET 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.

When applying for a position, you may provide personal information, including: • Identifiers and Contact Information such as your name, date of birth, home address, personal email, phone number, government Identifiers (such as your driving license and/or national identification number); • Log In Details, including your email address, username and password when you sign in to submit your application; https://avient.referrals.selectminds.com/ https://www.avient.com/company/policies-and-governance/avient-corporation-privacy-statement mailto:HR@polyone.com • Protected Classifications, to the extent permitted by applicable law, such as your gender, race and ethnic origin; • Professional or Employment-Related Information, such as your resume or CV, employment background and history, job qualifications, the position for which you would like to submit an application, employment references, your current salary, bonuses, salary expectation or any other information you elect to provide, including information relating to any previous applications you may have submitted with us or any previous work experience with Avient, professional affiliations or memberships, and preferred start date; • Educational Information, such as educational background, your school transcripts, educational and training history, your English proficiency which may be required for certain positions, language and special competencies, certification information; and • Other personal information you choose to submit to us in connection with your application, such as contact information of references, information disclosed in an interview, or your personal situation In addition, as a part of the application process, you may be asked questions about your work authorization, and your willingness to submit to a background or criminal record check and/or medical examination as permitted by applicable law.

Isso pode incluir: • Informações fornecidas ao preencher formulários e inscrições em nosso Website, como quando se inscreve para se tornar fornecedor ou solicita documentação relacionada a SDS, ISO, REACH, ROHS ou UL. • Informações fornecidas ao se inscrever para newsletters ou outros materiais informativos, ao solicitar suporte técnico, de vendas ou de atendimento ao cliente, e ao fornecer feedback sobre nosso Website. • Registros e cópias de correspondências conosco (incluindo endereços de e-mail). • Dados de contato comerciais e informações de contas comerciais necessárias para fornecer produtos ou serviços a você. Isso pode incluir: • Informações fornecidas ao preencher formulários e inscrições em nosso Website, como quando se inscreve para se tornar fornecedor ou solicita documentação relacionada a SDS, ISO, REACH, ROHS ou UL. • Informações fornecidas ao se inscrever para newsletters ou outros materiais informativos, ao solicitar suporte técnico, de vendas ou de atendimento ao cliente, e ao fornecer feedback sobre nosso Website. • Registros e cópias de correspondências conosco (incluindo endereços de e-mail). • Dados de contato comerciais e informações de contas comerciais necessárias para fornecer produtos ou serviços a você.

POLYONE CORPORATION [THIS PAGE INTENTIONALLY LEFT BLANK] Exhibit 31.1 CERTIFICATION I, Robert M. Patterson Chairman, President and Chief Executive Officer February 16, 2017 POLYONE CORPORATION Exhibit 31.2 CERTIFICATION I, Bradley C. POLYONE CORPORATION Exhibit 32.2 CERTIFICATION PURSUANT TO 18 U.S.C.

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Seller warrants that goods subject to the sale (“Product”) are owned exclusively by Seller and are free from any encumbrances or rights of third persons and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Sælger har baseret alle anbefalinger til Køber på oplysninger, som Sælger anser Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product con- forms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifi- cations”).

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).