Annual Report | 2024 2 STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company, LLC 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about Avient, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.avient.com or free of charge from: Investor Relations Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 1-440-930-1000 ANNUAL MEETING The annual meeting of Avient will be held virtually via live webcast at 9:00 a.m. Year Ended December 31, 2024 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 169.5 $ 1.84 $ 75.8 $ 0.83 Special items, after-tax 15.9 0.17 79.3 0.86 Amortization expense, after-tax 59.5 0.65 61.5 0.67 Adjusted net income / EPS $ 244.9 $ 2.66 $ 216.6 $ 2.36 (1) Per share amounts may not recalculate from figures presented herein due to rounding Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations – GAAP $ 170.7 $ 76.3 Income tax expense 54.1 11.0 Interest expense 105.6 115.3 Depreciation and amortization from continuing operations 179.7 188.8 EBITDA from continuing operations $ 510.1 $ 391.4 Special items, before tax 20.1 114.6 Interest expense included in special items (2.3) (2.3) Depreciation and amortization included in special items (1.5) (1.9) Adjusted EBITDA $ 526.4 $ 501.8 Adjusted EBITDA as a percent of sales 16.2 % 16.0 % Corporate Officers Ashish K. Johnson Vice President, Tax Holger Kronimus Vice President, Europe, General Manager, Engineered Materials, Europe M.

Until that number is zero, we have more work to do. Ongoing potential risk identification and mitigation in occupational health and safety is critical to our “safety first” culture. The template also facilitates the identification of new smelters and refiners to potentially undergo an audit via the RMI Conflict–Free Smelter program.

In addition, at any time prior to delivery, Seller may pass through increased freight, transportation, or fuel surcharges, and/or duties, tariffs, or taxes imposed upon Seller in connection with the sale/shipment of the Product after order acceptance. Taxes, Fees, and Duties. Buyer will reimburse Seller for all federal, state, provincial, local or other taxes (other than income taxes), use and excise taxes or charges, including environmental remedial taxes and fees, and any other similar taxes, duties, and charges or any kind which Seller must pay in connection with the manufacture and supply of Product, but only those amounts not already included in the price at the commencement of this contract.

Until that number is zero, we have more work to do. Special “life skills” training sessions help HYPE participants in areas such as benefits enrollment and filing a personal tax return. And that number kept growing.

For and on behalf of BSI: Chief Operating Officer Assurance - Americas Certification Date: 2018-05-10 Latest Issue: 2018-05-10 Expiry Date: 2021-05-09 BSI Certificate Number: 691920 IATF Number: 0303891 Page: 1 of 2 This certificate remains the property of BSI and shall be returned immediately upon request. IATF Contracted Office: BSI Assurance UK Limited, registered in England under number 7805321 at 389 Chiswick High Road, London W4 4AL, UK. IATF Contracted Office: BSI Assurance UK Limited, registered in England under number 7805321 at 389 Chiswick High Road, London W4 4AL, UK.

Requirements: Excellent clarity, scratch resistance and exceptional toughness Avient Distribution HC Portfolio: Acrylic, copolyester, PC, clarified PP Visual Identification Use colors and additives to differentiate and identify your brand, product or batch.

Taxes, Fees, and Duties. Buyer will reimburse Seller for all federal, state, provincial, local or other taxes (other than income taxes), excises or charges, including environmental remedial taxes and fees, which Seller must pay in connection with the manufacture and supply of Product, but only those amounts not already included in the price at the commencement of this contract. Seller's invoices will include value added tax, where applicable, and such value added tax shall be a separate line item on the invoice. 11.

In addition, at any time prior to delivery, Seller may pass through increased fuel surcharges or taxes imposed upon Seller in connection with the sale/shipment of the Product after order acceptance. 7. Taxes. Buyer will reimburse Seller for all national, state, local or other taxes (other than income taxes), excises or charges, and fees, which Seller must pay in connection with the manufacture and supply of Product, but only those amounts not already included in the price at the commencement of this contract. 8.

In addition, at any time prior to delivery, Seller may pass through increased freight, transportation, or fuel surcharges, and/or duties, tariffs, or taxes imposed upon Seller in connection with the sale/shipment of the Product after order acceptance. 9. Taxes, Fees, and Duties. Buyer will reimburse Seller for all federal, state, provincial, local or other taxes (other than income taxes), excises or charges, including environmental remedial taxes and fees, which Seller must pay in connection with the manufacture and supply of Product, but only those amounts not already included in the price at the commencement of this contract.

Belgium Branch 08/11/2021 Registered seat Route de Bastogne 19 09/08/2018 9638 Pommerloch Luxembourg Website www.polyone.com Declarative 09/08/2018 Legal Situation Status Start Date End Date Normal situation Active 09/08/2018 Legal form Start Date End Date Foreign entity 09/08/2018 VAT activities Vesaliusstraat 31 - 1000 Brussels E: ol.brussel@xerius.be T: 02 609 62 30 26/11/2021 4Extract from Page 2from Functions Last Name, first Name Registered entity Start Date End DateReason for termination Representative (branch) Roels Jean-Marie 31/08/2018 Last Name, first Name Registered entity Start Date End DateReason for terminationEntrepreneurial skills - Ambulant commerce - Fairground operator 31/08/2018Non SME dispensation (Exemption) Characteristic Phase Duration Start Date End DateReason for termination Employer National Social Security Office Characteristic/authorisation 01/11/2018undetermined Subject to VAT Characteristic/authorisation 31/08/2018undetermined Enterprise subject to registration Characteristic/authorisation 01/11/2018undetermined General assembly End Date Financial Year Start Date Exceptional Year Start Date End DateEnd Date Exceptional Year Financial Details Share capital (Capital Stock) Currency Duration of the entity 12,000.00 EUR June 31/12 09/08/2018 Use Bank account number Start Date End DateBank account number Bank Accounts BIC For all purposes 685 8477013 57 31/08/2018BE09685847701357BOFABE3X External Identifiers NSSO number 143954886 Trade register number 19 0097620 There is no data available for the following sections: Authorisations, Working partners :, Ex-officio striking off, Links between registered entities List of branches Branch - Center of operations Rue Melville Wilson 2 09/08/2018 België 26/11/2021 4Extract from Page 3from Establishment unit number 2.278.618.585 Trade name French Avient S.à r.l., Belgium Branch 08/11/2021 Rue Melville Wilson 2 31/08/2018 België Website www.polyone.com Declarative 31/08/2018 31/08/2018Start date establishment unit End date establishment unit Start date link between entities End date link between entities 31/08/2018 Activities Wholesale trade of industrial chemicals: aniline, printing ink, essential oils, industrial gases, chemical glues, dyes, synthetic resin, methanol, paraffin, etc. It is therefore necessary to refer to the Belgian legislation in force in order to determine their scope. 26/11/2021 2Extract from Page 1from EXTRACT OF THE ESTABLISHMENT UNIT DETAILS Crossroads Bank of Enterprises: 0314.595.348 Establishment unit number 2.278.618.585 Trade name French Avient S.à r.l., Belgium Branch 08/11/2021 Rue Melville Wilson 2 31/08/2018 Belgium Website www.polyone.com Declarative 31/08/2018 31/08/2018Start date establishment unit End date establishment unit Start date link between entities End date link between entities 31/08/2018 Registered entity Legal Situation Normal situation Vesaliusstraat 31 - 1000 Brussels E: ol.brussel@xerius.be T: 02 609 62 30 26/11/2021 2Extract from Page 2from Activities Wholesale trade of industrial chemicals: aniline, printing ink, essential oils, industrial gases, chemical glues, dyes, synthetic resin, methanol, paraffin, etc.