Malawi Panama Uruguay Czech Republic Lithuania Switzerland Indonesia Oman Uzbekistan Mali Puerto Rico Venezuela Denmark Luxembourg Ukraine Iraq Pakistan Vietnam Mauritius Trinidad, Tobago Estonia Malta United Kingdom Israel Philippines Morocco United Sates Finland Monaco Japan Qatar Nigeria France Netherlands Jordan Russian Federation Senegal HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 11 As I reflect on my first year as VP of Sustainability in 2019, I am incredibly proud of the achievements that our global associates have made in advancing our sustainability journey.

Garratt’s benefits for expatriate assignment expenses resulted from his assignment in Luxembourg, and included advance tax payments for 2024 ($933,181), as well as housing ($66,182), transportation, school fees, and additional costs and expenses.

Mariana Islands Mexico Uruguay Cyprus Luxembourg Switzerland Israel Qatar Kenya Nicaragua Venezuela Czech Republic Malta Ukraine Japan Russia Libya Panama Denmark Moldova United Kingdom Jordan Saudi Arabia Madagascar Puerto Rico Estonia Netherlands Kazakhstan Singapore Mali Trinidad & Tobago Finland North Macedonia Kyrgyzstan South Korea Mauritius United States France Norway Kuwait Sri Lanka Morocco HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 15 • Sustainability performance recognized with a Gold Medal for EcoVadis, and with an A- Ranking for CDP Climate Change • Ranked as one of America’s Most Responsible Companies by Newsweek, 100 Most Sustainable Companies by Barron’s, and recognized on the USA Today’s America’s Climate Leaders List • Reaffirmed our commitment to the UN Global Compact and the Alliance to End Plastic Waste • Launched Avient’s Product Carbon Footprint (PCF) Mapping Service, 3rd party certified by TÜV Rhineland • Recognized with 4 sustainability innovation and design recognitions as finalists or award winners • Made strong progress in reducing company’s Scope 1 & 2 GHG emissions, reaching nearly 50% reduction in 2023 vs. 2019 Message from Avient’s VP of Sustainability Sustainability is core to Avient’s strategy.

Garrattʼs benefits for expatriate assignment expenses resulted from his current assignment in Luxembourg, and included tax equalization payments ($176,047), as well as housing ($71,112), transportation, school fees ($42,153), and additional costs and expenses.

Malawi Panama Uruguay Czech Republic Lithuania Switzerland Indonesia Oman Uzbekistan Mali Puerto Rico Venezuela Denmark Luxembourg Ukraine Iraq Pakistan Vietnam Mauritius Trinidad, Tobago Estonia Malta United Kingdom Israel Philippines Morocco United Sates Finland Monaco Japan Qatar Nigeria France Netherlands Jordan Russian Federation Senegal HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 11 As I reflect on my first year as VP of Sustainability in 2019, I am incredibly proud of the achievements that our global associates have made in advancing our sustainability journey.

Mariana Islands Mexico Uruguay Cyprus Luxembourg Switzerland Israel Qatar Kenya Nicaragua Venezuela Czech Republic Malta Ukraine Japan Russia Libya Panama Denmark Moldova United Kingdom Jordan Saudi Arabia Madagascar Puerto Rico Estonia Netherlands Kazakhstan Singapore Mali Trinidad & Tobago Finland North Macedonia Kyrgyzstan South Korea Mauritius United States France Norway Kuwait Sri Lanka Morocco HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 15 • Sustainability performance recognized with a Gold Medal for EcoVadis, and with an A- Ranking for CDP Climate Change • Ranked as one of America’s Most Responsible Companies by Newsweek, 100 Most Sustainable Companies by Barron’s, and recognized on the USA Today’s America’s Climate Leaders List • Reaffirmed our commitment to the UN Global Compact and the Alliance to End Plastic Waste • Launched Avient’s Product Carbon Footprint (PCF) Mapping Service, 3rd party certified by TÜV Rhineland • Recognized with 4 sustainability innovation and design recognitions as finalists or award winners • Made strong progress in reducing company’s Scope 1 & 2 GHG emissions, reaching nearly 50% reduction in 2023 vs. 2019 Message from Avient’s VP of Sustainability Sustainability is core to Avient’s strategy.

Cameroon Tanzania New Caledonia Haiti Colombia Belgium Ireland Serbia Greater China Nepal Uzbekistan Egypt Tunisia New Zealand Honduras Ecuador Bosnia Herzegovina Italy Slovakia India Oman Vietnam Ethiopia Uganda Jamaica Paraguay Bulgaria Kosovo Slovenia Indonesia Pakistan Yemen Gabon Zambia Mexico Peru Croatia Latvia Spain Iraq Philippines Ghana Zimbabwe Nicaragua Suriname Cyprus Lithuania Sweden Israel Qatar Guinea Panama Uruguay Czech Republic Luxembourg Switzerland Japan Russia Ivory Coast Puerto Rico Venezuela Denmark Malta Ukraine Jordan Saudi Arabia Kenya Trinidad & Tobago Estonia Moldova United Kingdom Kazakhstan Singapore Libya United States Finland Netherlands Kyrgyzstan South Korea Mali France North Macedonia Kuwait Sri Lanka Mauritius HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 16 • Welcomed Dyneema® Protective Materials to the Avient portfolio, significantly increasing our sustainable solutions portfolio • Ranked as one of Barron’s 100 Most Sustainable Companies, Newsweek’s America’s Most Responsible Companies, and a WSJ Top 250 Best-Managed Companies • Launched 40+ new Sustainable Solutions globally in 2022 • Avient’s Sustainable Solutions Portfolio has grown at a compounded annual growth rate of 11% since 2016 • Recognized with 5 technology and design awards with products launched in 2022 • Enhanced our carbon disclosures, including Scope 3 emissions, and a 3rd party certification of our carbon emissions Message from Avient’s VP of Sustainability At Avient, sustainability is an integral part of who we are as a company.

Garratt’s benefits for expatriate assignment expenses resulted from his current assignment in Luxembourg, and included tax equalization payments ($179,963), advance tax payments for 2023 ($364,378), as well as housing ($72,799), transportation, school fees, and additional costs and expenses.

Exhibit Description 10.30+ Amendment No. 1 to the PolyOne Supplemental Retirement Benefit Plan (As Amended and Restated Effective December 31, 2007) (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2009, SEC File No. 1-16091) 10.31+ Form of Grant of Performance Shares under the 2009 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2009, SEC File No. 1-16091) 10.32+ Form of Grant of Stock-Settled Stock Appreciation Rights under the 2009 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.4 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2009, SEC File No. 1-16091) 10.33+ Form of Grant of Performance Units under the 2009 Long-Term Incentive Plan (incorporated by reference to Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2009, SEC File No. 1-16091) 10.34+ Executive Severance Plan, as amended and restated effective February 17, 2009 (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2009, SEC File No. 1-16091) 10.35+ Undetermined Time Employment Contract between PolyOne Luxembourg s.a.r.l. and Bernard Baert (incorporated herein by reference to Exhibit 10.1 to the Company’s Form 8-K, filed with the Commission on September 2, 2009, SEC File No. 1-106091) 10.36+ Amendment No. 2 to the PolyOne Supplemental Retirement Benefit Plan (As Amended and Restated Effective December 31, 2007) (incorporated by reference to Exhibit 10.51 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009, SEC File No. 1-16091) 10.37+ First Amendment to the PolyOne Corporation 2010 Equity and Performance Incentive Plan (incorporated by reference to Appendix A to the Company’s definitive proxy statement on Schedule 14A, SEC File No. 1-16091, filed on March 23, 2012) 10.38+ Form of Award Agreement under the PolyOne Corporation 2010 Equity and Performance Incentive Plan, as amended as of March 9, 2012. 21.1 Subsidiaries of the Company 23.1 Consent of Independent Registered Public Accounting Firm — Ernst & Young LLP 23.2 Consent of Independent Registered Public Accounting Firm — Ernst & Young LLP 31.1 Certification of Stephen D.

Garratt’s benefits for expatriate assignment expenses resulted from his current assignment in Luxembourg, and included tax equalization payments ($179,963), advance tax payments for 2023 ($364,378), as well as housing ($72,799), transportation, school fees, and additional costs and expenses.