In the cases below, the following person must give Form W-9 to the partnership for purposes of establishing its U.S. status and avoiding withholding on its allocable share of net income from the partnership conducting a trade or business in the United States

Sauf convention contraire, les prix s'entendent nets, hors transport et hors taxes, sur la base des tarifs communiqués à l'Acheteur au jour de la passation de la commande. 4.

V: Iemand vroeg me net om de deur voor hem open te houden om hem te helpen een van onze gebouwen te betreden. Computerbeveiliging, softwarelicenties en copyrights Net zoals bij andere vormen van informatie die kritiek zijn voor de werking van Avient, moet u informatie op computers of op verschillende opslagmedia zorgvuldig bewaken tegen accidentele of niet-gemachtigde duplicatie, wijziging, openbaarmaking, verlies, diefstal of vernietiging.

HIGHLIGHTS from 2023: • Improve fuel economy • Reduce energy consumption • Reduce carbon footprint • Lessening environmental impact • Specialty solutions designed to replace traditional materials (e.g. metal, wood) at lower weight • Alternative solutions to reduce emittance of volatile organic compounds • Lightweighting design and solutions to reduce material usage • Avient Design Services to reduce weight or energy consumption REDUCE Consumer Transportation Building & Construction 20% LESS MATERIAL Lightweight Dashboards Hydrocerol™ Chemical Foaming Agents REDUCES VOCs SmartBatch™ FX for Body & Trim Paint Replacement 59% Air Cargo Nets Bio-Based Dyneema® Fiber SUSTAINABLE DESIGN Design for Lightweighting Avient Design Services LESS WEIGHT 60% EV Connectors Edgetek™ PKE Non-Halogen Flame Retardant Formulations LEARN MORE40% LED Lighting Components Therma-Tech™ Thermally Conductive Formulations LESS CO2 THAN NYLON LIGHTER THAN ALUMINUM LEARN MORE HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 43Sustainability Report | 2023 43 https://www.avient.com/products/polymer-additives/foaming-agents/hydrocerol-chemical-foaming-agents https://www.avient.com/products/polymer-colorants/color-additive-combination-masterbatches/smartbatch-fx-paint-replacement-0 https://www.dyneema.com/sustainability/bio-based-dyneema-fiber https://www.avient.com/resource-center/services/avient-design https://www.avient.com/products/engineered-polymer-formulations/chemical-corrosion-resistant-formulations/edgetek-pke-polyketone-formulations https://www.avient.com/products/engineered-polymer-formulations/conductive-signal-radiation-shielding-formulations/therma-tech-thermally-conductive-formulations PRESERVE Avient’s portfolio of PRESERVE sustainable solutions are designed to preserve natural resources like water, protect human health and safety, and enable sustainable infrastructure. Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2006 2014 2023 Sales $ 2,622.4 $ 3,835.5 $ 3,142.8 Net income from continuing operations – GAAP $ 133.5 $ 77.2 $ 76.3 Income tax expense 29.7 11.2 11.0 Interest expense, net 63.1 62.2 115.3 Depreciation and amortization from continuing operations 57.1 123.9 188.8 EBITDA from continuing operations 283.4 274.5 391.4 Special items, before tax (34.0) 164.9 114.6 Interest expense included in special items — — (2.3) Depreciation and amortization included in special items — (23.1) (1.9) JV - equity income (107.0) — — Adjusted EBITDA $ 142.4 $ 416.3 $ 501.8 Adjusted EBITDA as a percent of sales 5.4 % 10.9 % 16.0 % 1 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.

HIGHLIGHTS from 2023: • Improve fuel economy • Reduce energy consumption • Reduce carbon footprint • Lessening environmental impact • Specialty solutions designed to replace traditional materials (e.g. metal, wood) at lower weight • Alternative solutions to reduce emittance of volatile organic compounds • Lightweighting design and solutions to reduce material usage • Avient Design Services to reduce weight or energy consumption REDUCE Consumer Transportation Building & Construction 20% LESS MATERIAL Lightweight Dashboards Hydrocerol™ Chemical Foaming Agents REDUCES VOCs SmartBatch™ FX for Body & Trim Paint Replacement 59% Air Cargo Nets Bio-Based Dyneema® Fiber SUSTAINABLE DESIGN Design for Lightweighting Avient Design Services LESS WEIGHT 60% EV Connectors Edgetek™ PKE Non-Halogen Flame Retardant Formulations LEARN MORE40% LED Lighting Components Therma-Tech™ Thermally Conductive Formulations LESS CO2 THAN NYLON LIGHTER THAN ALUMINUM LEARN MORE HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 43Sustainability Report | 2023 43 https://www.avient.com/products/polymer-additives/foaming-agents/hydrocerol-chemical-foaming-agents https://www.avient.com/products/polymer-colorants/color-additive-combination-masterbatches/smartbatch-fx-paint-replacement-0 https://www.dyneema.com/sustainability/bio-based-dyneema-fiber https://www.avient.com/resource-center/services/avient-design https://www.avient.com/products/engineered-polymer-formulations/chemical-corrosion-resistant-formulations/edgetek-pke-polyketone-formulations https://www.avient.com/products/engineered-polymer-formulations/conductive-signal-radiation-shielding-formulations/therma-tech-thermally-conductive-formulations PRESERVE Avient’s portfolio of PRESERVE sustainable solutions are designed to preserve natural resources like water, protect human health and safety, and enable sustainable infrastructure. Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2006 2014 2023 Sales $ 2,622.4 $ 3,835.5 $ 3,142.8 Net income from continuing operations – GAAP $ 133.5 $ 77.2 $ 76.3 Income tax expense 29.7 11.2 11.0 Interest expense, net 63.1 62.2 115.3 Depreciation and amortization from continuing operations 57.1 123.9 188.8 EBITDA from continuing operations 283.4 274.5 391.4 Special items, before tax (34.0) 164.9 114.6 Interest expense included in special items — — (2.3) Depreciation and amortization included in special items — (23.1) (1.9) JV - equity income (107.0) — — Adjusted EBITDA $ 142.4 $ 416.3 $ 501.8 Adjusted EBITDA as a percent of sales 5.4 % 10.9 % 16.0 % 1 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.

HIGHLIGHTS from 2023: • Improve fuel economy • Reduce energy consumption • Reduce carbon footprint • Lessening environmental impact • Specialty solutions designed to replace traditional materials (e.g. metal, wood) at lower weight • Alternative solutions to reduce emittance of volatile organic compounds • Lightweighting design and solutions to reduce material usage • Avient Design Services to reduce weight or energy consumption REDUCE Consumer Transportation Building & Construction 20% LESS MATERIAL Lightweight Dashboards Hydrocerol™ Chemical Foaming Agents REDUCES VOCs SmartBatch™ FX for Body & Trim Paint Replacement 59% Air Cargo Nets Bio-Based Dyneema® Fiber SUSTAINABLE DESIGN Design for Lightweighting Avient Design Services LESS WEIGHT 60% EV Connectors Edgetek™ PKE Non-Halogen Flame Retardant Formulations LEARN MORE40% LED Lighting Components Therma-Tech™ Thermally Conductive Formulations LESS CO2 THAN NYLON LIGHTER THAN ALUMINUM LEARN MORE HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 43Sustainability Report | 2023 43 https://www.avient.com/products/polymer-additives/foaming-agents/hydrocerol-chemical-foaming-agents https://www.avient.com/products/polymer-colorants/color-additive-combination-masterbatches/smartbatch-fx-paint-replacement-0 https://www.dyneema.com/sustainability/bio-based-dyneema-fiber https://www.avient.com/resource-center/services/avient-design https://www.avient.com/products/engineered-polymer-formulations/chemical-corrosion-resistant-formulations/edgetek-pke-polyketone-formulations https://www.avient.com/products/engineered-polymer-formulations/conductive-signal-radiation-shielding-formulations/therma-tech-thermally-conductive-formulations PRESERVE Avient’s portfolio of PRESERVE sustainable solutions are designed to preserve natural resources like water, protect human health and safety, and enable sustainable infrastructure. Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2006 2014 2023 Sales $ 2,622.4 $ 3,835.5 $ 3,142.8 Net income from continuing operations – GAAP $ 133.5 $ 77.2 $ 76.3 Income tax expense 29.7 11.2 11.0 Interest expense, net 63.1 62.2 115.3 Depreciation and amortization from continuing operations 57.1 123.9 188.8 EBITDA from continuing operations 283.4 274.5 391.4 Special items, before tax (34.0) 164.9 114.6 Interest expense included in special items — — (2.3) Depreciation and amortization included in special items — (23.1) (1.9) JV - equity income (107.0) — — Adjusted EBITDA $ 142.4 $ 416.3 $ 501.8 Adjusted EBITDA as a percent of sales 5.4 % 10.9 % 16.0 % 1 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.

Masterbatch Solutions for Mosquito Nets Find out about the technology behind Avient’s antimosquito masterbatches for mosquito nets that support the fight against vector born diseases like malaria

Parameters used in the Net Zero Emissions (NZE) 2050 scenario included measurable factors that may have a financial impact on Avient’s business. Assumptions made in use of the Net Zero Emissions (NZE) 2050 scenario include anticipated policy results achieved in the short term to long-term time horizon affecting the electricity and heat, industry, buildings, transport and other sectors across the period of 2025 to 2050.