Avient follows the ISO 14067:2018 standard to calculate PCF values and utilizes global formulation expertise, green manufacturing processes, and sourcing & logistics competence to achieve such low or negative values.  

Fuel-and-energy-related activities (not included in Scope 1 or 2) Evaluation status Relevant, calculated Emissions in reporting year (metric tons CO2e) 50,179 Emissions calculation methodology Average data method Percentage of emissions calculated using data obtained from suppliers or value chain partners 100 Please explain Avient utilizes our Scope 2 emissions and applies a regional transmission and distribution loss % to calculate this value. Commuting mileage outliers were assigned an average value calculated for that year. Emissions for carbon black were calculated using an emission factors from US-EI 2.2.

Fuel-and-energy-related activities (not included in Scope 1 or 2) Evaluation status Relevant, calculated Metric tonnes CO2e 4,941 Emissions calculation methodology Avient utilizes our Scope 2 emissions and applies a regional transmission and distribution loss % to calculate this value. Waste generated in operations Evaluation status Relevant, calculated Metric tonnes CO2e 5,792 Emissions calculation methodology Site level solid waste data was collected and emissions were calculated utilizing the Department for Environment Food and Rural Affairs (DEFRA) (2019 v1.0). Commuting mileage outliers were assigned an average value calculated for that year.

Simply Supported Beam Deflection Hammerhead panel core density at various panel thicknesses Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate * To calculate deflection for different panel widths, use the following formula: Deflection = Chart value* [12 / panel width]. Example: Deflection for 24 inch panel = Chart value *[12 / 24] Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate Simply Supported Beam Deflection - Metric 115 kg/m3 core density at various panel thicknesses * To calculate deflection for different panel widths, use the following formula: Deflection = Chart value* [12 / panel width]. Example: Deflection for 24 inch panel = Chart value *[12 / 24] Fixed End Beam Deflection - Metric 115 kg/m3 core density at various panel thicknesses Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate * To calculate deflection for different panel widths, use the following formula: Deflection = Chart value* [12 / panel width].

Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010* 2011* 2012* 2013* 2014* 2015* 2016** 2017** 2018 2018*** Q1 2019*** 2019 Q1 2020 Net income from continuing operations attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 166.4 $ 173.5 $ 161.1 $ 87.7 $ 22.4 $ 75.5 $ 33.1 Joint venture equity earnings, after tax (19.0) (14.7) (3.7) — — — — — — — — — — — Special items, before tax (1) (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 23.8 32.9 59.5 58.7 12.2 61.7 9.6 Special items, tax adjustments (1) (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (15.9) (24.8) (25.3) (25.1) (1.2) (5.9) (1.0) Adjusted net income from continuing operations attributable to PolyOne common shareholders $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 174.3 $ 181.6 $ 195.3 $ 121.3 $ 33.4 $ 131.3 $ 41.7 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 82.1 80.4 80.4 78.2 77.7 86.7 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.06 $ 2.21 $ 2.43 $ 1.51 $ 0.43 $ 1.69 $ 0.48 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation. ** Pro forma for sale of Designed Structures and Solutions segment (DSS). *** Pro forma for sale of Performance Products and Solutions segment (PP&S). Below is a reconciliation of this non-GAAP financial measure to the most directly comparable financial measure calculated and presented in accordance with GAAP.

A PCF calculation for the use of OnColor REC colorants is available on request. KEY CHARACTERISTICS • Derived from recycled content including end-of-life tires • Available for multiple resins and custom solutions • Retains performance characteristics of traditional carbon black in plastics • Passes REACH and RoHS requirements • Prop 65 letters available • Certified by TÜV Rheinland • PCF calculation available on request MARKET AND APPLICATIONS OnColor REC Polymer Colorants are sustainable solutions across a wide variety of industries and applications, including: • Automotive • Wire and cable • Building and construction • Appliances • Electrical and electronics • Industrial molding applications • Office furniture 1.844.4AVIENT www.avient.com Copyright © 2024, Avient Corporation.

AUTOMOTIVE OEM I N T E R I O R D O O R P A N E L • Available for multiple resins and approved OEM colors • Maintain performance characteristics of traditional raw materials that use conventional carbon black • Pass REACH and RoHS requirements • Retain color consistency and stability • Provide a Product Carbon Footprint (PCF) calculation that aligns with ISO 14067:2018 • Provided recycled content formulations that met all design and engineering goals while achieving sustainability targets • Provided effective alternative to materials using virgin carbon black • Achieved color stability under xenon arc and TUV methodology • Supplied necessary PCF calculation certified by TÜV Rheinland and aligning with ISO 14067 requirements OnColor™ REC Polymer Colorants KEY REQUIREMENTS WHY AVIENT?

FIBER MANUFACTURER T E X T I L E S & F A B R I C S • Provide a Product Carbon Footprint (PCF) calculation to align with ISO 14067:2018 and to help in meeting sustainability goals • Procure feedstock from renewable resources • Maintain comparative performance to conventional carbon black • Achieve color stability under xenon arc and TUV testing • Offer solutions for rPET, PP, PE, PBT, and PA6 where a desire for environmentally responsible products exists • Offered sustainable platform approach supported by extensive fiber expertise • Helped meet sustainability targets while attaining all design and engineering goals • Supplied necessary PCF calculation certified by TÜV Rheinland and aligning with ISO 14067 requirements • Provided effective alternative to virgin carbon black • Achieved reductions in CO2e emissions vs.

Microsoft PowerPoint - PolyOne Investor Presentation 5.4.20_v8 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • P E O P L E P R O D U C T S P L A N E T P E R F O R M A N C E •• •• •• JVs Performance Products & Solutions Distribution Specialty     To be the world’s premier provider of specialized polymer materials, services and solutions To be the world’s premier provider of specialized polymer materials, services and sustainable solutions • • • • • • • • • • • • • • 2016 2017 2018 2019 Lightweighting Reduced Material Requirements Improved Recyclability Renewable Energy Applications Eco-conscious Bio-derived Content Reduced Energy Use VOC Reduction $275M $325M $355M $410M 14% Total Annual Growth 9% Organic Annual Growth PolyOne Corporation 33 Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010* 2011* 2012* 2013* 2014* 2015* 2016** 2017** 2018 2018*** Q1 2019*** 2019 Q1 2020 Net income from continuing operations attributable to PolyOne common shareholders Joint venture equity earnings, after tax Special items, before tax (1) Special items, tax adjustments (1) Adjusted net income from continuing operations attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 166.4 $ 173.5 $ 161.1 $ 87.7 $ 22.4 $ 75.5 $ 33.1 (19.0) (14.7) (3.7) — — — — — — — — — — — (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 23.8 32.9 59.5 58.7 12.2 61.7 9.6 (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (15.9) (24.8) (25.3) (25.1) (1.2) (5.9) (1.0) $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 174.3 $ 181.6 $ 195.3 $ 121.3 $ 33.4 $ 131.3 $ 41.7 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 82.1 80.4 80.4 78.2 77.7 86.7 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.06 $ 2.21 $ 2.43 $ 1.51 $ 0.43 $ 1.69 $ 0.48 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation. ** Pro forma for sale of Designed Structures and Solutions segment (DSS). *** Pro forma for sale of Performance Products and Solutions segment (PP&S). Below is a reconciliation of this non-GAAP financial measure to the most directly comparable financial measure calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

Microsoft PowerPoint - PolyOne Investor Presentation 5.4.20_v8 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • P E O P L E P R O D U C T S P L A N E T P E R F O R M A N C E •• •• •• JVs Performance Products & Solutions Distribution Specialty     To be the world’s premier provider of specialized polymer materials, services and solutions To be the world’s premier provider of specialized polymer materials, services and sustainable solutions • • • • • • • • • • • • • • 2016 2017 2018 2019 Lightweighting Reduced Material Requirements Improved Recyclability Renewable Energy Applications Eco-conscious Bio-derived Content Reduced Energy Use VOC Reduction $275M $325M $355M $410M 14% Total Annual Growth 9% Organic Annual Growth PolyOne Corporation 33 Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010* 2011* 2012* 2013* 2014* 2015* 2016** 2017** 2018 2018*** Q1 2019*** 2019 Q1 2020 Net income from continuing operations attributable to PolyOne common shareholders Joint venture equity earnings, after tax Special items, before tax (1) Special items, tax adjustments (1) Adjusted net income from continuing operations attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 166.4 $ 173.5 $ 161.1 $ 87.7 $ 22.4 $ 75.5 $ 33.1 (19.0) (14.7) (3.7) — — — — — — — — — — — (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 23.8 32.9 59.5 58.7 12.2 61.7 9.6 (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (15.9) (24.8) (25.3) (25.1) (1.2) (5.9) (1.0) $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 174.3 $ 181.6 $ 195.3 $ 121.3 $ 33.4 $ 131.3 $ 41.7 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 82.1 80.4 80.4 78.2 77.7 86.7 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.06 $ 2.21 $ 2.43 $ 1.51 $ 0.43 $ 1.69 $ 0.48 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation. ** Pro forma for sale of Designed Structures and Solutions segment (DSS). *** Pro forma for sale of Performance Products and Solutions segment (PP&S). Below is a reconciliation of this non-GAAP financial measure to the most directly comparable financial measure calculated and presented in accordance with GAAP. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.