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, cantonal 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 the contract of which these Terms form part of.

Taxes, Fees, and Duties. Seller's invoices will include value added tax, and such value added tax shall be a separate line item on the invoice. Seller shall not be liable to Buyer for any other taxes or duties of any kind unless specifically and mutually agreed to between the parties. 11.

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), 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.

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), 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 the Contract.

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), 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.

Global Compact • Highlights ESG Performance, including ratings, awards, and certifications • Features increased carbon emissions disclosures, including Climate Change Scenario Analysis and Scope 3 emissions data • Outlines Sustainable Supplier Program, designed to enable supplier evaluation & collaboration • Reflects Great Place To Work® culture focused on safety, employee engagement and advancing diversity, equity and inclusion 2022 SUSTAINABILITY REPORT 15 Avient Confidential 16 • Virtual presentation to be held September 20, 2023 • Leadership will be conducting an investor-focused presentation around our sustainable solutions portfolio • Deep dive into how we enable customers to achieve their sustainability goals SUSTAINABILITY DAY 16 …are Growing at Twice the Rate as Conventional Products Sustainably-Branded Products… STAKEHOLDER INFLUENCE DRIVES DEMAND Consumers Are demanding recyclability and eco- conscious products Governments Are mandating changes through legislation, taxes, and regional accords Brand Owners Have committed to ambitious goals to achieve sustainability metrics 17 AP P EN D IX 20 Performance Additives 16% Pigments 12% TiO2 10% Dyestuffs 2% Polyethylene 11% Nylon 6% Polypropylene 5% Styrenic Block Copolymer 5% Other Raw Materials 33% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials 2022 pro forma results for the acquisition of Avient Protective Materials RAW MATERIAL BASKET PEER COMPARISONS AVIENT IS ASSET LIGHT Capex / Revenue 2023E (%) Avient Specialty Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of July 21, 2023 Note: Avient reflects 2023 estimated revenue of $3,280 and estimated run-rate CAPEX of $110M. 22 3 2 3 3 4 4 3 3 4 5 5 7 8 8 A vi en t K W R P P G F U L R P M A V Y F M C H U N C E H X L E C L A S H E M N S C L FREE CASH FLOW CONVERSION Source: Peer data per Bloomberg as of July 21, 2023 Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures. Three Months Ended June 30, 2023 Three Months Ended June 30, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 22.1 $ 0.24 $ 62.8 $ 0.68 Special items, after tax 19.6 0.21 3.2 0.03 Amortization expense, after-tax 16.2 0.18 $ 10.5 $ 0.12 Adjusted net income / EPS $ 57.9 $ 0.63 $ 76.5 $ 0.83 Three Months Ended June 30, Six Months Ended June 30, Reconciliation to EBITDA and Adjusted EBITDA: 2023 2022 2023 2022 Net income from continuing operations – GAAP $ 22.3 $ 62.8 $ 43.6 $ 127.5 Income tax expense 10.4 22.7 18.1 42.7 Interest expense, net 29.4 16.2 58.2 33.1 Depreciation and amortization 47.6 36.5 98.1 74.3 EBITDA from continuing operations $ 109.7 $ 138.2 $ 218.0 $ 277.6 Special items, before tax 21.7 0.9 49.0 7.6 Depreciation and amortization included in special items (0.1) (1.1) (1.9) (3.2) Adjusted EBITDA $ 131.3 $ 138.0 $ 265.1 $ 282.0 Pro forma APM adjustments — 34.3 — 66.3 Pro forma adjusted EBITDA $ 131.3 $ 172.3 $ 265.1 $ 348.3 Pro forma adjusted EBITDA as a % of sales 15.9 % 17.4 % 15.9 % 17.6 % 1 AVNT Q2 2023 Earnings Presentation 7.26.23 IR Deck - AVNT-2023.06.30 7.24 1217PM non GAAP attachment Attachment

Hanna consolidate • Cultures clash – commodity wins • Dependent on income derived from commodity joint ventures The First 6 Years • Globally organized along three strategic platforms • Non-core equity investment dispositions • Talent upgrades, discipline instilled throughout organization • New CEO hired to transform POL into specialty business �18 of 20 officers new • Implemented four pillar strategy • Nearly 50% of The Second 6 Years History of PolyOne – A Transformation • Focused on increasing volume, not profits • Heavily tied to cyclical markets 2000 2006 2012 The FormationThe Formation The TransformationThe Transformation The New PolyOneThe New PolyOne organization • Demonstrated ability to deliver • Nearly 50% of business operating income derived from Specialty Platform* • Specialty assets acquired *Pro forma for ColorMatrix acquisition Page 8 30% 50% 70% 90% $10 $12 $14 $16 $18 PolyOnePolyOne Stock Price S&P 500 (relative performance) Strategy and Execution Drive Results | | | | -50% -30% -10% 10% 30% $0 $2 $4 $6 $8 $10 2006 2007 2008 2009 2010 2011 2012 Page 9 Four Pillar Strategy The World’s Premier Provider of Specialized Polymer Materials, Services & Solutions Page 10 60% 80% 100% % o f O p e ra ti n g I n co m e * Old PolyOne Transformation 2012 Target “What We Said” Mix Shift Highlights Specialty Transformation Ahead of Schedule *Operating Income excludes Corporate Charges ** Pro Forma for the acquisition of ColorMatrix and divestiture of SunBelt 2% 34% 42% 50% >50% 0% 20% 40% 2005 2008 2011 2011** 2012 % o f O p e ra ti n g I n co m e * JV's PP&S Distribution Specialty Specialty OI $5M $46M $89M $117M “What We Said” Page 11 2007 2012 Target 2011 “Where we were” “What we said” “Where we are” 1) Operating Income % Specialty 3.2% 10% - 12% 8.9% PP&S 6.1% 8% - 10% 7.2% Pro forma ColorMatrix Proof of Performance Distribution 3.0% 4% - 5% 5.6% 2) Specialty Platform sss% of Operating Income 20% >50% 50% 3) Specialty Vitality Index 21% 35% - 40% 49% 4) ROIC* (pre-tax) 11% >15% 16% 5) Sales outside the US 37% >40% 40% *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period Page 12 2011 Pro forma ColorMatrix 2015 Target “Where we are” “Where we expect to be” 1) Operating Income % Specialty 8.9% PP&S 7.2% 12 – 16% 9 – 12% Elevating our Expectations and Yours PP&S 7.2% Distribution 5.6% 2) Specialty Platform % of Operating Income 50% 3) ROIC* (after-tax) 10% 4) Adjusted Annual EPS Growth 3 yr CAGR = 71% 9 – 12% 6 – 7.5% 65 – 75% 15% Double Digit Expansion *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period Page 13 • Four pillar strategy, coupled with our ability to execute is driving results • Strong leadership team driving growth & executing • Innovation and services provide differentiation and How do we get there?

TAXES Seller's invoices will include value added tax, and such value added tax shall be a separate line item on the invoice. Seller shall not be liable to Buyer for any other taxes or duties of any kind unless specifically and mutually agreed to between the parties. 9. FISCALITE Les factures du Vendeur devront inclure la taxe sur la valeur ajoutée et cette taxe sur la valeur ajoutée devra figurer sur une ligne à part sur la facture.

• Permita a los empleados y otras partes interesadas informar de preguntas o inquietudes relacionadas con su negocio, personal o productos. https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf • Defienda la libertad de asociación y el derecho a la negociación colectiva de acuerdo con las leyes aplicables. • Cumpla con todas las leyes aplicables que rigen los requisitos salariales y horarios de trabajo, incluida la remuneración, las prestaciones y horas extra.

• Soutenir la liberté d’association et le droit à la négociation collective conformément aux lois applicables. https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf • Respecter toutes les lois applicables régissant les exigences en matière de salaire et d’heures de travail, y compris la rémunération, les avantages sociaux et les heures supplémentaires.