EMEA Pommerloch / Luxembourg Salce Office Regional Headquaters PolyOne S.à r.l., Avient Luxembourg S.à r.l., 19 Route de Bastogne Pommerloch, Luxembourg, L-9638

Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 100 facilities and employing approximately 8,400 associates, Avient (formerly PolyOne) Corporation (NYSE: AVNT), is a premier provider of specialized sustainable material. Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 100 facilities and employing approximately 9,100 associates, Avient (formerly PolyOne) Corporation (NYSE: AVNT), is a premier provider of specialized sustainable material.

OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. EY has been retained as the independent registered public accounting firm for Avient and its predecessor companies, PolyOne Corporation and The Geon Company, continuously since 1993.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 9 https://www.avient.com/careers https://www.avient.com/company/sustainability/people/community-service https://www.avient.com/investors Historic Transformation, Inspired Future Avient Corporation was originally established as PolyOne Corporation in 2000 through the consolidation of two companies in the materials industry. Animal Testing Policy Audit Committee Charter California Transparency in Supply Chains Act Disclosure Code of Conduct Code of Ethics—Applicable to Avient Senior Officers ColorMatrix Europe Limited—Modern Slavery and Human Trafficking Statement Compensation Committee Charter Conflict Minerals Policy Corporate Governance Guidelines Environmental Policy Equal Employment Opportunity Global ISO Certificate Library Global Policy on Anti-Bribery and Anti-Corruption Global Policy on Antitrust Governance and Corporate Responsibility Committee Charter Position on Human Rights Privacy Policy Product Stewardship Policy Quality Policy Responsible Care Policy Safety and Health Policy Security Policy Supplier Code of Conduct HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 82 https://www.avient.com/sites/default/files/2022-03/Sustainability%20ESG%20Disclosures_Animal%20Testing%20Policy.pdf https://www.avient.com/sites/default/files/2020-07/avient-audit-committee-charter-rev-10-2019.pdf https://www.avient.com/california-transparency-act-disclosure https://www.avient.com/sites/default/files/2022-03/2022%20Senior%20Financial%20Officer%20Code%20of%20Conduct%20Policy%5B75%5D.pdf https://www.avient.com/sites/default/files/2022-05/Compensation%20Committee%20Charter%20(REV%2010-2019).pdf https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/sites/default/files/2021-03/corporate-governance-guidelines-2021.pdf https://www.avient.com/sites/default/files/2021-04/eeo-updated-2020.pdf https://www.avient.com/company/policies-and-governance/global-policy-anti-bribery-and-anti-corruption https://www.avient.com/company/policies-and-governance/global-policy-antitrust https://www.avient.com/sites/default/files/2020-07/avient-governance-and-corporate-responsibility-committee-charter-rev-2020.pdf https://www.avient.com/sites/default/files/2021-07/avient-human-rights-position-statement-updated-july-2021.pdf https://www.avient.com/company/policies-and-governance/polyone-corporation-privacy-statement https://www.avient.com/sites/default/files/2022-05/Avient_ProdStewardship_Policy_2022%20Update.pdf https://www.avient.com/sites/default/files/2022-05/Avient%20Quality%20Policy.pdf https://www.avient.com/sites/default/files/2021-05/avient-responsible-care-ehs-s-policies-2021.pdf https://www.avient.com/sites/default/files/2020-10/avient-security-policy-august-2020.pdf METRICS Aldringen, Belgium by Lavinia Bocan HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | IndexHOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 83Sustainability Report | 2022 83 People Data and Metrics Category 2019 2020 2021 2022 Total TRIR (#—Direct) 0.56 0.50 0.55 0.51 Total TRIR (#—Contractors) 0.00 0.00 0.00 0.00 Recordable Injuries (Total #) 36 37 55 57 Recordable Illnesses (Total #) 0 0 0 0 Total LTIR (#—Direct) 0.29 0.24 0.14 0.15 Total LTIR (#—Contractors) 0.00 0.00 0.00 0.00 Total Injuries of High Consequence (% of TRIR) 14 5 2 0 Total Fatality Rate (#—Direct) 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Contractors) 0.00 0.00 0.00 0.00 Process Safety Incident Count (#) 0 0 0 0 Process Safety Total Incident Rate (#) 0.00 0.00 0.00 0.00 Process Safety Incident Severity Rate (#) 0.00 0.00 0.00 0.00 Transport Incidents (#—US DOT 5800/EU ADR) 0 0 0 0 Safety Improvements Completed (#) N/A N/A 10,100 14,658 EH&S Internal Audits (#) 58 37 25 40 Workers covered by an EH&S Management Systems (%) 100 100 100 100 Workers covered by an internally audited EH&S MS (%) 100 100 100 100 Facilities externally certified ISO45001 (or equivalent — %)* N/A 52 56 54 Suppliers externally certified ISO45001 (% of surveyed) N/A 44 56 53 *Certificates can be found at (https://www.avient.com/company/policies-and-governance/global-iso-certificate-library) HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 84 Planet Data and Metrics ENERGY1 Total Energy (GJ) 2,377,860 2,242,291 2,361,107 2,265,482 Energy Intensity (GJ/MT Sales) 5.09 5.04 4.77 5.05 Renewable Electricity (MWh)** 104,880.63 122,505.22 174,701.68 232,488.43 Electric Power (MWh) 461,426.13 439,773.23 460,693.35 439,215.11 Renewable Electricity (%) 23 28 38 53 Renewable Energy (%) 16 20 27 37 Total Self-Generated Energy (GJ) 11,845 14,590 11,461 12,019 Energy Saving Activities (#) 59 74 102 129 Annual Savings from Energy Saving Activities (GJ) 35,573 19,470 72,845 439,347 Capital Invested in Energy Savings ($MM USD) 1.97 2.43 1.74 5.05 PURCHASED ENERGY (%) Purchased Electricity (%) 49.74 51.70 51.05 69.79 Purchased Natural Gas (%) 12.89 14.11 13.46 29.45 Purchased Steam (%) 0.00 0.00 0.00 0.00 Purchased Diesel Fuel (%) 0.87 0.95 1.12 0.76 SOURCES OF PURCHASED ELECTRICITY (%)2 Non-Renewable: Coal 46.72 45.53 41.12 40.04 Non-Renewable: Natural Gas 33.69 36.12 17.51 17.41 Non-Renewable: Other Fossil Fuels 0.00 0.00 0.26 0.21 Non-Renewable: Nuclear 11.95 11.37 9.86 9.01 Non-Renewable: Oil 2.16 1.60 1.82 1.70 Renewable: Hydro 3.24 2.23 14.79 15.22 Renewable: Wind 0.70 0.88 7.94 9.02 Renewable: Solar 1.48 2.20 3.76 4.67 Renewable: Biomass 0.06 0.07 2.53 2.44 Renewable: Geothermal 0.00 0.00 0.29 0.28 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 85 EMISSIONS1 Greenhouse Gas Emissions (MT Scope 1 GHG)** 36,680 39,023 36,147 34,792 Greenhouse Gas Emissions (MT Scope 2 GHG)** 169,789 102,479 100,595 99,465 Greenhouse Gas Emissions (MT Scope 3 GHG)3 584,622 1,440,584 2,122,338 6,421,128 Greenhouse Gas Emissions (MT Scope 1 & 2 GHG)** 206,469 141,502 136,742 134,257 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ MT Sales) 0.44 0.32 0.28 0.30 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ B Revenue) 51,864 63,886 41,249 39,524 Annual GHG Emissions Avoidance from ESA & WMP (MT) 8,378 10,235 33,631 115,099 Reportable Releases—above permitted limits (#) 0 0 0 0 EMISSIONS OF SOX/NOX/VOC/HAPS (MT) SOx 0.14 0.13 0.13 0.25 NOx 14.74 10.85 11.77 12.96 VOC 695.40 659.43 648.17 563.96 Top 4 Hazardous Air Pollutants 0.98 1.00 1.18 6.96 Particulate Matter 33.78 30.99 32.88 28.02 WASTE Total Waste (MT) 31,087 29,783 33,090 32,267 Total Waste Intensity (Kg Waste/MT Sales) 66.60 66.92 66.90 71.88 Total Waste Intensity (MT Waste/ B Revenue) 7,809 13,447 9,982 9,499 Percent of Total Waste Recycled/Beneficially Reused (%) 51.45 50.51 47.85 48.60 Percent of Total Waste Landfilled (%) 40.13 40.20 43.26 44.24 Total Waste Landfilled (MT)** 12,476 11,972 14,315 14,274 Total Non-Hazardous Waste (MT) 27,608 26,606 29,298 28,503 Waste Minimization Projects (#) 34 53 142 114 Annual Diversion from Waste Minimization Projects (MT) 2,087 743 3,136 8,425 Capital Invested in Waste Minimization ($MM USD) 0.00 0.33 1.48 2.68 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 86 HAZARDOUS WASTE Hazardous Waste US & Canada (%) 29 16 19 21 Hazardous Waste Latin America (%) 5 5 6 6 Hazardous Waste Europe (%) 36 51 41 34 Hazardous Waste Asia Pacific (%) 27 25 30 36 Hazardous Waste Middle East & Africa (%) 3 3 4 3 Total Hazardous Waste (MT) 3,480 3,177 3,792 3,850 WATER Total Water Withdrawal (1000 m3) 1,356 1,801 1,796 1,738 Total Water Withdrawal Intensity (m3/MT Sales) 2.90 4.05 3.63 3.87 Total Wastewater Discharge (1000 m3) 892 1,032 1,164 1,122 Wastewater Recycled (% of Total) 34 43 35 35 Total Water Related NoV (#) 0 0 0 0 Withdrawal & Consumed from High Water Stress Areas (% of Total) 38 35 30 28 Water Minimization Projects (#) 4 6 19 19 Annual Diversion from Water Minimization Projects (1000 m3) 9 19 55 115 Capital Invested in Water Minimization ($MM USD) 0.04 0.38 0.24 0.07 CERTIFIED ENVIRONMENTAL MANAGEMENT SYSTEMS Facilities externally certified to ISO14001/RC14001 (%)4 N/A 50 52 57 Facilities externally certified to ISO50001 (# of high energy sites)4 2 2 2 2 Suppliers externally certified ISO14001 (% of surveyed) N/A 70 75 72 Suppliers externally certified to ISO50001 (% of surveyed) N/A 17 19 24 * Includes estimated full year performance of APM acquisition ** 2019 baseline data revised to account for acquisition pro-forma performance and divestitures 1 Refer to CDP Climate Change Report for finalized Energy/Emissions information at https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report 2 Estimates.

PROXY SUMMARY 4 PROXY STATEMENT 2022 | Annual Meeting of Shareholders OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. EY has been retained as the independent registered public accounting firm for Avient and its predecessor companies, PolyOne Corporation and The Geon Company, continuously since 1993.

Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 120 facilities and employing approximately 8,700 associates, Avient (formerly PolyOne) Corporation is a premier provider of specialized sustainable material. Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 120 facilities and employing approximately 8,700 associates, Avient (formerly PolyOne) Corporation, is a premier provider of specialized sustainable material.

Sustainability Report | 2021 9 https://www.avient.com/careers https://www.avient.com/company/sustainability/people/community-service https://www.avient.com/investors http://endplasticwaste.org Historic Transformation, Inspired Future Avient Corporation was originally established as PolyOne Corporation in 2000 through the consolidation of two companies in the materials industry. https://www.avient.com/sites/default/files/2022-03/Sustainability%20ESG%20Disclosures_Animal%20Testing%20Policy.pdf https://www.avient.com/sites/default/files/2020-07/avient-audit-committee-charter-rev-10-2019.pdf https://www.avient.com/california-transparency-act-disclosure https://www.avient.com/sites/default/files/2022-03/2022%20Senior%20Financial%20Officer%20Code%20of%20Conduct%20Policy%5B75%5D.pdf https://www.avient.com/sites/default/files/2022-05/Compensation%20Committee%20Charter%20(REV%2010-2019).pdf https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/sites/default/files/2022-05/Avient_Environmental%20Policy_2022%20Update.pdf https://www.avient.com/sites/default/files/2021-04/eeo-updated-2020.pdf https://www.avient.com/company/policies-and-governance/global-iso-certificate-library https://www.avient.com/company/policies-and-governance/global-policy-anti-bribery-and-anti-corruption https://www.avient.com/company/policies-and-governance/global-policy-antitrust https://www.avient.com/sites/default/files/2020-07/avient-governance-and-corporate-responsibility-committee-charter-rev-2020.pdf https://www.avient.com/company/policies-and-governance/polyone-corporation-privacy-statement https://www.avient.com/sites/default/files/2022-05/Avient_ProdStewardship_Policy_2022%20Update.pdf https://www.avient.com/sites/default/files/2022-05/Avient%20Quality%20Policy.pdf https://www.avient.com/sites/default/files/2021-05/avient-responsible-care-ehs-s-policies-2021.pdf https://www.avient.com/sites/default/files/2022-05/Avient_Health_And_Safety_Policy_2022%20Update.pdf https://www.avient.com/sites/default/files/2020-10/avient-security-policy-august-2020.pdf Metrics Sustainability Report | 2021 83Sustainability Report | 2021 83 Sustainability Report | 2021 84 People Data and Metrics Total TRIR (#—Direct) 0.69 0.51 0.56 0.50 0.55 Total TRIR (#—Contractors) 0.00 0.00 0.00 0.00 0.00 Recordable Injuries (Total #) 43 35 36 37 55 Recordable Illnesses (Total #) 0 0 0 0 0 Total LTIR (#—Direct) 0.20 0.13 0.29 0.24 0.14 Total LTIR (#—Contractors) 0.00 0.00 0.00 0.00 0.00 Total Injuries of High Consequence (% of TRIR) 9 12 14 5 2 Total Fatality Rate (#—Direct) 0.00 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Contractors) 0.00 0.00 0.00 0.00 0.00 Process Safety Incident Count (#) 0 0 0 0 0 Process Safety Total Incident Rate (#) 0.00 0.00 0.00 0.00 0.00 Process Safety Incident Severity Rate (#) 0.00 0.00 0.00 0.00 0.00 Transport Incidents (#—US DOT 5800/EU ADR) 0 0 0 0 0 Safety Improvements Completed (#) NA NA NA NA 10,100 EH&S Internal Audits (#) 53 53 58 37 25 Workers covered by an EH&S Management Systems (%) 100 100 100 100 100 Workers covered by an internally audited EH&S MS (%) 100 100 100 100 100 Facilities externally certified ISO45001 (or equivalent — %)* NA NA NA 52 56 Suppliers externally certified ISO45001 (% of surveyed) NA NA NA 44 56 *Certificates can be found at HYPERLINK (https://www.avient.com/company/policies-and-governance/global-iso-certificate-library) Sustainability Report | 2021 85 ENERGY1 Total Energy (GJ) 775,091 869,390 1,523,524 1,564,854 1,671,768 Energy Intensity (MWh/MT Sales) 0.86 0.91 0.95 0.98 0.95 Renewable Electricity (%) 0 0.49 0.69 31.40 43.71 Renewable Energy (%) NA NA NA 23.33 25.68 Total Self-Generated Energy (GJ) 0 3808 4588 5001 3755 Energy Saving Activities (#) 26 41 59 74 102 Annual Savings from Energy Saving Activities (MWh) 1,507 2,601 9,882 5,212 17,420 Capital Invested in Energy Savings ($MM USD) NA NA NA 2.43 1.74 PERCENT ENERGY (%) Purchased Electricity (%) 73.18 75.11 77.53 Purchased Natural Gas (%) 25.80 21.02 20.8 Purchased Steam (%) 0.00 0.00 0.00 Purchased Diesel Fuel (%) 1.02 3.87 1.68 SOURCES OF PURCHASED ELECTRICITY (%)* Non-Renewable: Coal 41.12 Non-Renewable: Natural Gas 17.51 Non-Renewable: Other Fossil Fuels 0.26 Non-Renewable: Nuclear 9.86 Non-Renewable: Oil 1.82 Renewable: Hydro 14.79 Renewable: Wind 7.94 Renewable: Solar 3.76 Renewable: Biomass 2.53 Renewable: Geothermal 0.29 Planet Data and Metrics Sustainability Report | 2021 86 EMISSIONS1 Greenhouse Gas Emissions (MT Scope 1 GHG) 21,527 11,882 18,749 21,092 18,216 Greenhouse Gas Emissions (MT Scope 2 GHG) 244,927 85,112 155,086 87,776 85,892 Greenhouse Gas Emissions (MT Scope 3 GHG)2 NA 193,483 584,622 1,440,584 2,122,338 Greenhouse Gas Emissions (MT Scope 1 & 2 GHG) 275,811 96,994 173,835 108,868 104,108 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ MT Sales) 0.35 0.38 0.39 0.25 0.21 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/$B Revenue) 84,674 36,723 43,666 28,778 21,605 Annual GHG Emissions Avoidance from ESA & WMP (MT) 1,548 2,508 8,377 10,184 26,490 Reportable Releases (above permitted limits) 0 0 0 0 0 EMISSIONS OF SOx/NOx/VOC/HAPS (MT) SOx 0.05 0.06 0.08 0.08 0.08 NOx 0.05 0.06 0.09 0.08 0.09 VOC 32.18 31.14 43.58 40.26 42.95 Top 4 Hazardous Air Pollutants 0.58 0.60 0.98 1.00 1.18 Particulate Matter 24.70 23.76 33.78 30.99 32.88 WASTE Total Waste (MT) 12,453 13,396 26,065 23,709 26,277 Total Waste Intensity (Kg Waste/MT Sales) 20.18 17.79 58.27 54.16 53.51 Total Waste Intensity (MT Waste/$B Revenue) 1,572 1,357 6,547 6,267 5,453 Percent of Total Waste Recycled/Beneficially Reused (%) 57.07 62.65 48.79 47.43 47.32 Percent of Total Waste Landfilled (%) 40.77 35.11 45.82 41.82 42.76 Total Waste Landfilled (MT) 5,077 4,703 11,943 9,915 11,215 Total Non-Hazardous Waste (MT) NA 12,722 24,135 21,823 24,045 Waste Minimization Projects (#) 47 41 38 59 161 Annual Diversion from Waste Minimization Projects (MT) NA 5,892 11,019 20,052 57,681 Capital Invested in Waste Minimization ($MM USD) NA NA NA 0.71 1.72 Sustainability Report | 2021 87 HAZARDOUS WASTE Hazardous Waste US & Canada (%) NA NA 1.0 1.3 0.85 Hazardous Waste Latin America (%) NA NA 6.4 6.9 11.3 Hazardous Waste Europe (%) NA NA 51.4 60.2 45.44 Hazardous Waste Asia Pacific (%) NA NA 35.6 26.4 36.07 Hazardous Waste Middle East & Africa (%) NA NA 5.6 5.2 6.35 Total Hazardous Waste (MT) NA 674.35 1,930 1,886 2,233 WATER Total Water Withdrawal (1000 m3) 662 666 1,159 1,309 1,263 Total Water Withdrawal Intensity (m3/MT Sales) 2.64 2.57 2.59 2.99 2.57 Total Wastewater Discharge (1000 m3) NA NA 691 553 594 Wastewater Recycled (% of Total) NA NA 40.38 57.75 52.97 Total Water Related NoV (#) 0 0 0 0 0 Withdrawal & Consumed from High Water Stress Areas (% of Total) NA NA 39.3 40.8 35.3 CERTIFIED ENVIRONMENTAL MANAGEMENT SYSTEMS Facilities externally certified to ISO14001/RC14001 (%)** NA NA NA 50 52 Facilities externally certified to ISO50001 (% of high energy sites)** NA NA 10 10 10 Suppliers externally certified ISO14001 (% of surveyed) NA NA NA 70 75 Suppliers externally certified to ISO50001 (% of surveyed) NA NA NA 17 19 * Estimates—does not include renewable energy credits from Virtual Power Purchase Agreements ** Certificates can be found at HERE 1 Refer to CDP Climate Change Report for finalized Energy/Emissions information.

OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. EY has been retained as the independent registered public accounting firm for Avient and its predecessor companies, PolyOne Corporation and The Geon Company, continuously since 1993.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 9 https://www.avient.com/company/sustainability/people/community-service https://www.avient.com/investors http://endplasticwaste.org/ Strong Foundation, Confident Future Avient Corporation was originally established as PolyOne Corporation in 2000 through the consolidation of two companies in the materials industry.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 9 https://www.avient.com/company/sustainability/people/community-service https://www.avient.com/investors http://endplasticwaste.org/ Strong Foundation, Confident Future Avient Corporation was originally established as PolyOne Corporation in 2000 through the consolidation of two companies in the materials industry.