 Strong past performance demonstrates that our strategy and execution are working  Megatrends and emerging opportunities align with our strengths  Innovation and services provide differentiation, incremental pricing power, and competitive advantage  Strong and proven management team driving growth and performance  Addressable market exceeds $40 billion Page 15 Schedule I Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Below is a reconciliation of non-GAAP financial measures to the most directly comparable measures calculated and presented in accordance with U.S.

Specialty Engineered Materials END MARKETS REGIONS 17% 14%13% Defense Packaging Telecom 54% 33% US & Canada Europe, Middle East Energy Copyright © . 2025 16 Avient 2024 regional sales, by end market US & CANADA 41% of sales EMEA 35% of sales ASIA 18% of sales LATIN AMERICA 6% of sales 22% Packaging TelecomEnergyDefenseHealthcareBuilding & TransportationIndustrialConsumer 26% 16% 31% 26% 1%1% 2% 61% Copyright © . 2025 17 NON-HYDROCARBON MATERIALS HYDROCARBON-BASED ~35% of the raw material basket including part of “Other raw materials” are hydrocarbon-based Raw material basket 16% 4% 4% Performance additives Pigments TiO2 Dyestuffs Styrenic block copolymers Polypropylene Nylon Polyethylene Other raw materials Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income attributable to Avient common shareholders and diluted adjusted earnings per share (EPS) attributable to Avient common shareholders, excluding special items, to assess performance and facilitate comparability of results.

NÁŠ KODEX CHOVÁNÍ VYDÁNO: ŘÍJNA 2024 Úvod: Zpráva od generálního ředitele 1 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 Diverzita a inkluze 8 Diskriminace nebo obtěžování 8 Vztahy na pracovišti 9 Užívání návykových látek 10 Fyzické bezpečí a násilí na pracovišti 10 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. POCTIVOST NA INTEGRITA PŘI NAŠEM SPOLEČENSKÁ KODEX CHOVÁNÍ | 11 Přesné informace, data a záznamy Úplné, přesné a spolehlivé záznamy jsou zásadně důležité pro správná rozhodnutí a efektivní provoz. KODEX CHOVÁNÍ | 12 POCTIVOST NA INTEGRITA PŘI NAŠEM SPOLEČENSKÁ 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 POCTIVOST NA INTEGRITA PŘI NAŠEM SPOLEČENSKÁ Otázka: Moje vedoucí je na dovolené a v době její nepřítomnosti jsem byla požádána, abych jménem společnosti podepsala smlouvu.

Increased global IT security threats and more sophisticated and targeted computer crime pose a risk to the security of our systems and networks and the confidentiality, availability and integrity of our data and communications. SELECTED FINANCIAL DATA Refer to Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Part II of this Annual Report on Form 10-K and the notes to our accompanying consolidated financial statements for additional information regarding the financial data presented below, including matters that might cause this data not to be indicative of our future financial condition, results of operations or cash flows. Level 2 investments included within the respective common collective trust funds are valued using a net asset value per share that is based on quoted market prices and/or other market data for the same or comparable instruments and transactions of the underlying equity or fixed income investments.

Increased global information systems security threats and more sophisticated and targeted computer crime pose a risk to the security of our systems and networks and the confidentiality, availability and integrity of our data and communications. SELECTED FINANCIAL DATA Refer to Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Part II of this Annual Report on Form 10-K and the notes to our accompanying consolidated financial statements for additional information regarding the financial data presented below, including matters that might cause this data not to be indicative of our future financial condition, results of operations or cash flows. Level 2 investments included within the respective common collective trust funds are valued using a net asset value per share that is based on quoted market prices and/or other market data for the same or comparable instruments and transactions of the underlying equity or fixed income investments.

Buyer acknowledges that information in Seller’s marketing materials, technical data sheets and other descriptive publications distributed or published on its websites may vary from time to time without notice. Buyer acknowledges that Seller has furnished to Buyer Safety Data Sheets, which include warnings together with safety and health information concerning the Product and/or the containers for such Product. Buyer acknowledges and represents that it is familiar with and shall strictly comply with all applicable laws and regulations concerning the trade, export or re-export of products, services, data or technology (“Items”), including the International Traffic in Arms Regulations (ITAR), the Export Administration Regulations (EAR) and the trade sanctions regulations administered by the U.S.

Buyer acknowledges that information in Seller’s marketing materials, technical data sheets and other descriptive publications distributed or published on its websites may vary from time to time without notice. Buyer acknowledges that Seller has furnished to Buyer Safety Data Sheets, which include warnings together with safety and health information concerning the Product and/or the containers for such Product. Buyer acknowledges and represents that it is familiar with and shall strictly comply with all applicable laws and regulations concerning the trade, export or re-export of products, services, data or technology (“Items”), including the International Traffic in Arms Regulations (ITAR), the Export Administration Regulations (EAR) and the trade sanctions regulations administered by the U.S.

Buyer acknowledges that information in Seller’s marketing materials, technical data sheets and other descriptive publications distributed or published on its websites may vary from time to time without notice. Buyer acknowledges that Seller has furnished to Buyer Safety Data Sheets, which include warnings together with safety and health information concerning the Product and/or the containers for such Product. Buyer acknowledges and represents that it is familiar with and shall strictly comply with all applicable laws and regulations concerning the trade, export or re-export of products, services, data or technology (“Items”), including the International Traffic in Arms Regulations (ITAR), the Export Administration Regulations (EAR) and the trade sanctions regulations administered by the U.S.

In addition, we store sensitive data, including proprietary business information, intellectual property and confidential employee or other personal data, on our servers and databases. We also tested management’s controls to validate that the data used in the accrual estimate was complete and accurate. Level 2 investments are valued based on quoted market prices and/or other market data for the same or comparable instruments and transactions of the underlying fixed income investments.

Í Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). SELECTED FINANCIAL DATA Refer to Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in Part II of this Annual Report on Form 10-K and the notes to our accompanying consolidated financial statements for additional information regarding the financial data presented below, including matters that might cause this data not to be indicative of our future financial condition, results of operations or cash flows. Level 2 investments included within large cap equity are commingled trusts and are valued using a net asset value per share that is based on quoted market prices and/or other market data for the same or comparable instruments and transactions of the underlying equity investments.