In a typical year, we review competitive market compensation data relating to salary, annual incentives and long-term incentives. In preparing competitive market data for 2023, we drew from two independent sources. The second independent source of data that we used to augment the peer proxy analysis was the Consultant’s analysis of competitive market data relating to other applicable general industries.

In millions, except per share data) In millions, except per share data) Condensed Consolidated Balance Sheets

PY ( T O TA L C O M PA N Y ) $790 $719 2022 2023 $107 $114 2022 2023 Sales Adjusted EBITDA (in millions) $0.42 $0.52 2022 2023 Adjusted EPS (in millions) - 9% + 7% + 24% Sales Adjusted EBITDA Adjusted EPS 15 Q4 2023 SEGMENT PERFORMANCE 16 CAI $491 $459 Sales (in millions) $70 $84 EBITDA SEM $301 $260 Sales $55 $49 EBITDA - 7% - 14%+20% - 11% 2022 2023 (in millions) Q4 EBITDA BRIDGE ( T O TA L C O M PA N Y ) 17 $ millions CAI: Price / Mix 11 Deflation 14 SEM: Price / Mix 4 Deflation 9 Net Price Benefit 38 Cost Reductions 13 Wage Inflation (8) Other (2) Q4 2023 $114 Adjusted EBITDA Q4 2022 $ 107 Demand (34) • Demand was down, but less than in previous quarters, due to slowing pace of destocking • Positive net price benefit: o CAI – Pricing flat with favorable mix from uptick in packaging and consumer end markets and raw material deflation o SEM - Pricing flat with favorable mix from Composites and raw material deflation • Cost reductions primarily driven by reduced administrative costs and cost synergies 2 0 2 4 G U I D A N C E 2024 GUIDANCE Full Year 2024 Guidance Adjusted EBITDA $505 to $535 million Adjusted EPS $2.40 to $2.65 Interest Expense $105 to $110 million Adjusted Effective Tax Rate 23% to 25% Capital Expenditures ~$140 million 19 Q1 Adjusted EPS of $0.68 A P P E N D I X 21 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 RA W 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% 23 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2 0 2 3 R E V E N U E | $ 2 . 0 B I L L I O N US & Canada 34% EMEA 37% Asia 21% Latin America 8% END MARKET REGION 24 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 9% Building & Construction 10% Telecommunications 1% Energy 2% COLOR, ADDITIVES & INKS 2 0 2 3 R E V E N U E | $ 1 . 1 B I L L I O N US & Canada 52% EMEA 35% Asia 13% 25 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% 2 0 2 3 AV I E N T R E G I O N A L S A L E S 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% 26 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.

PREPERM™ Low-Loss Dielectric Thermoplastics, allowing faster and more reliable data connectivity and signal transmission Versaflex™ CE for 5G TPEs, providing signal transparency for mobile device accessories

THIS PAGE IS NOT PART OF AVIENT’S FORM 10-K FILING THIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILINGTHIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILINGTHIS PAGE IS NOT PART OF AVIENT’S FORM 10-K FILING Reconciliation of Non-GAAP Financial Measures (Unaudited) (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.

In a typical year, we review competitive market compensation data relating to salary, annual incentives and long-term incentives. In preparing competitive market data for 2023, we drew from two independent sources. The second independent source of data that we used to augment the peer proxy analysis was the Consultant’s analysis of competitive market data relating to other applicable general industries.

PY ( T O TA L C O M PA N Y ) $790 $719 2022 2023 $107 $114 2022 2023 Sales Adjusted EBITDA (in millions) $0.42 $0.52 2022 2023 Adjusted EPS (in millions) - 9% + 7% + 24% Sales Adjusted EBITDA Adjusted EPS 15 Q4 2023 SEGMENT PERFORMANCE 16 CAI $491 $459 Sales (in millions) $70 $84 EBITDA SEM $301 $260 Sales $55 $49 EBITDA - 7% - 14%+20% - 11% 2022 2023 (in millions) Q4 EBITDA BRIDGE ( T O TA L C O M PA N Y ) 17 $ millions CAI: Price / Mix 11 Deflation 14 SEM: Price / Mix 4 Deflation 9 Net Price Benefit 38 Cost Reductions 13 Wage Inflation (8) Other (2) Q4 2023 $114 Adjusted EBITDA Q4 2022 $ 107 Demand (34) • Demand was down, but less than in previous quarters, due to slowing pace of destocking • Positive net price benefit: o CAI – Pricing flat with favorable mix from uptick in packaging and consumer end markets and raw material deflation o SEM - Pricing flat with favorable mix from Composites and raw material deflation • Cost reductions primarily driven by reduced administrative costs and cost synergies 2 0 2 4 G U I D A N C E 2024 GUIDANCE Full Year 2024 Guidance Adjusted EBITDA $505 to $535 million Adjusted EPS $2.40 to $2.65 Interest Expense $105 to $110 million Adjusted Effective Tax Rate 23% to 25% Capital Expenditures ~$140 million 19 Q1 Adjusted EPS of $0.68 A P P E N D I X 21 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 RA W 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% 23 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2 0 2 3 R E V E N U E | $ 2 . 0 B I L L I O N US & Canada 34% EMEA 37% Asia 21% Latin America 8% END MARKET REGION 24 Packaging 34% Consumer 21% Healthcare 8% Industrial 15% Transportation 9% Building & Construction 10% Telecommunications 1% Energy 2% COLOR, ADDITIVES & INKS 2 0 2 3 R E V E N U E | $ 1 . 1 B I L L I O N US & Canada 52% EMEA 35% Asia 13% 25 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% 2 0 2 3 AV I E N T R E G I O N A L S A L E S 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% 26 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.

Reconciliation to Adjusted EPS Excluding Special Items and Impacts of February 2020 Equity Offering Three Months Ended March 31, 2020 Net income from continuing operations – GAAP $ 33.1 Special items, after tax (1) 8.6 After tax interest income earned on equity proceeds, included in Interest expense, net (0.7) Adjusted net income excluding special items and impact of interest income on equity proceeds $ 41.0 Diluted weighted-average shares used to compute earnings per common share 86.7 Weighted-average impact of 15.3 million shares issued in February 2020 equity offering (9.3) Diluted weighted-average shares excluding impact of shares issued in February 2020 equity offering 77.4 Adjusted EPS - excluding special items and the net impact of equity offering $ 0.53 Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to PolyOne shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to PolyOne shareholders, excluding special items, to assess performance and facilitate comparability of results. Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Avient Investor Presentation - Jefferies Industrials Conference August 2020.pdf August 2020 investor non-GAAP reconciliation.pdf August 2020 investor non-GAAP

All Rights Reserved 2024 19 Digital digital tools, data-driven insights artificial intelligence Higher run-rates, improved yields, reduced downtime and wastage Manufacturing execution system EXPECTED BENEFITS Reduction in time-to-market, use of alternative formulations to mitigate risks from resin shortage Color design EXPECTED BENEFITS Faster generation/repurposing of content, enhanced search engine optimization leading to more engagement Marketing content EXPECTED BENEFITS Copyright © . All Rights Reserved 2024 63 Avient is a compelling investment thesis Ability to adapt & pivot to deliver results highly motivated team with track record of operational and commercial excellence Global reach with local touch customer-centric focus across continents and cultures to serve locally and win globally Innovation differentiation by hybridizing technologies to create platforms at scale Portfolio aligned to high growth market segments and secular trends MARGIN EXPANSION and sustainable growth ORGANIC GROWTH complemented by M&A over time as needed Strong CASH GENERATION and EXECUTION Broad customer base and COMPETITIVE ADVANTAGE Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Below is a reconciliation of non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

NÁŠ KODEX CHOVÁNÍ VYDÁNO: ŘÍJNA 2024 OBSAH Úvod: Zpráva od generálního ředitele 1 Náš Kodex chování Pokyny pro etické chování 3 Osobní hodnoty 3 Vaše povinnosti 4 Další povinnosti vedoucích pracovníků a manažerů společnosti Avient 4 Otázky a odpovědi 4 Řešení otázek a hlášení nedodržování předpisů 5 Horká linka pro etiku 5 Zákaz odvetných opatření 6 Uplatňování kodexu chování 6 Porušení kodexu 6 Respekt vůči všem Diverzita a inkluze 8 Diskriminace nebo obtěžování 8 Vztahy na pracovišti 9 Užívání návykových látek 10 Fyzické bezpečí a násilí na pracovišti 10 Poctivost na pracovišti Přesné informace, data a záznamy 12 Účetní integrita 12 Firemní komunikace 14 Zabezpečení a používání majetku 14 Informations exclusives et confidentielles ; idées et propriété intellectuelle 15 Soukromí, osobní údaje a ochrana údajů 16 Používání internetu a e-mailů 16 Sociální média a sdružování v sociálních sítích 17 Bezpečnost počítačů, licence na software a autorská práva 17 Informace a obchodování zasvěcených osob 18 Politické příspěvky/aktivity a charitativní příspěvky 19 Vládní vyšetřování a dotazy 19 Integrita při našem podnikání Spravedlivé jednání 21 Úplatky a nelegální provize 21 Zástupci a konzultanti 22 Spravedlivá soutěž 22 Dary a pohoštění 23 Střety zájmů 24 Nekalé finanční transakce 25 Mezinárodní obchod 25 Praní špinavých peněz 25 Společenská odpovědnost firmy Trvalá udržitelnost 27 Bezpečnost, zdraví a životní prostředí 28 Bezpečnost výrobků a služeb 29 Respektování lidských práv 29 Společný závazek 29 Zdroje informací a kontaktní údaje Naše zásady 30 Interní kontakty 30 Horká linka pro etiku 30 Zpráva od generálního ředitele Vážený týme společnosti Avient, naše firemní rozhodnutí mají v dnešním složitém a propojeném světě dalekosáhlé následky. OBSAH ÚVOD NÁŠ KODEX CHOVÁNÍ RESPEKT VŮČI VŠEM POCTIVOST NA PRACOVIŠTI INTEGRITA PŘI NAŠEM PODNIKÁNÍ SPOLEČENSKÁ ODPOVĚDNOST FIRMY ZDROJE INFORMACÍ KODEX CHOVÁNÍ | 11 Přesné informace, data a záznamy Úplné, přesné a spolehlivé záznamy jsou zásadně důležité pro správná rozhodnutí a efektivní provoz. Některé příklady firemních záznamů: • Vývoj nových produktů • Výsledky testů • Laboratorní zprávy • Údaje z výzkumů • Finanční výkazy • Vyúčtování výdajů • Faktury • Hodinovníky • Záznamy o personálu • Pracovní plány • Dopisy, zpravodaje a e-mailové adresy spolupracovníků • Informace publikované v The Loop Vlastnické a důvěrné informace zahrnují: • Pracovní plány a strategie směrování • Údaje z výzkumů a technická data • Složení výrobků a technologie zpracování • Řízení výrobků • Obchodní tajemství, technologie a „know-how“ • Informace o naší konkurenceschopné pozici • Nepublikované finanční údaje a plány • Informace o nákladech na výrobky • Informace o navrhovaných smlouvách a transakcích • Informace o zákaznících, dodavatelích, cenách a jiné obchodní informace • Počítačový software a systémy vyvinuté pro naši společnost • Jakékoliv jiné informace, které by mohly být užitečné pro konkurenci KODEX CHOVÁNÍ | 13 OBSAH ÚVOD NÁŠ KODEX CHOVÁNÍ RESPEKT VŮČI VŠEM POCTIVOST NA PRACOVIŠTI INTEGRITA PŘI NAŠEM PODNIKÁNÍ SPOLEČENSKÁ ODPOVĚDNOST FIRMY ZDROJE INFORMACÍ Otázky a odpovědi Otázka: Moje vedoucí je na dovolené a v době její nepřítomnosti jsem byla požádána, abych jménem společnosti podepsala smlouvu.