Added in at volumes ranging from less than 1 percent to more than 70 percent by weight, minerals are typically mined from the earth and then refined to produce uniform particle size distribution.

RISK PERCEPTION RISK TOLERANCE DECISION OR ACTION .56 Injury Rate 65% of sites worked injury-free 110% increase in consecutive days injury free in the last two years SAFETY FIRST 50% 0 70%20 43% Average number of risk assessments completed every day Reduction in lacerations since 2017 Reduction in ergonomic related injuries Automobile related injuries Reduction in acquisition injury rate 74424.indd main_3 3/16/20 12:25 PM Annual Report | 2019 4 W ith our focus on People, it has led to the creation and expansion of Employee Resource Groups (ERGs) at PolyOne to advance diversity and inclusion.

2022 Proxy Statement TABLE OF CONTENTS Message from our CEO i Notice of 2022 Annual Meeting of Shareholders ii Record Date ii Voting Matters and Vote Recommendations ii Proxy Statement 1 Proxy Summary 1 Voting and Meeting Information 1 Attendance and Participation 1 Who is Eligible to Vote 1 Advance Voting Methods 2 Voting During the Annual Meeting 2 Questions 3 Company Operating Performance 3 Our Company Culture 4 The 4Ps of Sustainability at Avient 4 Impact of our Performance on Named Executive Officer 2021 Compensation 9 Our Director Nominees and Committee Membership 11 Summary of Director Nominee Skills, Experience and Background 12 Governance Highlights 13 Proposal 1 - Election of Twelve Director Nominees to Our Board of Directors 16 Proposal 2 - Advisory Vote to Approve Named Executive Officer Compensation 23 Proposal 3 - Ratification of the Appointment of Ernst & Young LLP as Our Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2022 25 Independent Registered Public Accountant Services and Related Fee Arrangements 25 Report of the Audit Committee 26 Corporate Governance 28 Director Independence 28 Lead Director 29 Board Leadership Structure 29 Majority Voting for Directors 29 Board Oversight of Risk 29 Board Oversight of ESG and Sustainability Matters 30 Code of Ethics, Code of Conduct and Corporate Governance Guidelines 31 Related Person Transactions 31 Communication with Board 32 Board and Committees 32 Board Refreshment and Diversity 36 2021 Non-Employee Director Compensation 38 Non-Employee Director Compensation Highlights 38 Non-Employee Director Retainer and Meeting Fees 38 2021 Non-Employee Director Compensation Table 39 Option Awards Outstanding and Fully Vested Deferred Shares 40 Ownership of Avient Shares 41 Beneficial Ownership of Our Common Shares 41 Stock Ownership Guidelines for Non-Employee Directors 42 Compensation Discussion and Analysis 43 Executive Summary 43 Executive Compensation Philosophy and Objectives 46 What We Pay and Why: Elements of Compensation 49 Other Aspects of our Compensation Programs 55 Executive Compensation 59 2021 Summary Compensation Table 59 2021 Grants of Plan-Based Awards 61 Outstanding Equity Awards at 2021 Fiscal Year-End 63 2021 Option Exercises and Stock Vested 64 2021 Non Qualified Deferred Compensation 64 Potential Payments Upon Termination or Change of Control 65 CEO Pay Ratio Disclosure 70 Compensation Committee Interlock and Insider Participation 70 Risk Assessment of the Compensation Programs 71 Compensation Committee Report 71 Miscellaneous Provisions 72 Voting at the Meeting 72 Revoking a Proxy 72 Shareholder Proposals 73 Proxy Solicitation 73 Appendix A A-1 i MESSAGE FROM OUR CEO March 29, 2022 Dear Fellow Shareholder: We have decided to hold the Annual Meeting virtually because doing so enables greater shareholder attendance and participation from any location around the world, and reduces the cost and environmental impact of the Annual Meeting. Beggs – 70%; and Messrs. EXECUTIVE COMPENSATION 70 PROXY STATEMENT 2022 | Annual Meeting of Shareholders (6) Continuation of health and welfare benefits, or comparable benefits, are provided under the Executive Severance Plan in the event of an involuntary termination without cause or the Continuity Agreement in the event of an involuntary termination following a change of control

Abernathy 70 2018 Yes M M Richard H. Director since: 2018 Age: 70 Current Public Company Directorships: • Haemonetics Corporation Former Directorships: • Halyard Health, Inc With respect to SARs granted in 2022, the table reflects a value of $0 for the SAR EXECUTIVE COMPENSATION PROXY STATEMENT 2025 | Annual Meeting of Shareholders 70 awards, as the 2022 SAR grants have not met any of the applicable stock price hurdles and the grant price in 2022 exceeds the December 31, 2024 closing stock price

Typical Sprue Designs for Various Hardness Values Typical TPE Hardness Range Most Common Sprue Puller Types Figure >50 Shore A Tapered, Pin, Z-Type 3, 4 and 6 40-70 Shore A Undercut 5 5-40 Shore A Pine Tree 7 Hot sprue bushings and extended nozzles may also be used with GLS TPEs.

AVIENT: WHO WE ARE 38 21 9 34 • U.S. and Canada • Latin America • Europe, Middle East & Africa • Asia 25,000+ CUSTOMERS Headquartered in Avon Lake, OH (Cleveland) 8,700+ employees 100+ manufacturing plants Key Financial Data 2022E Sales $5.1 billion 2022E EBITDA $635 million 2022E EPS $3.50 >70% ARE CUSTOMIZED SOLUTIONS TO UNIQUE SPECIFICATIONS of sales 3 W H O W E A R E – V I S I O N , S T R AT E G Y, C U LT U R E 4 Avient Corporation (NYSE: AVNT) provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

url=http://appliancerepair-salt-lake-city.com/sub-zero-appliance-repair-salt-lake-city/subzero-3d-logo/&rct=j&frm=1&q=&esrc=s&sa=U&ei=-vQmVb-MCefIsQTwwYHQAg&ved=0CBYQ9QEwAA&sig2=qX2fTujBfVO6eYzgLN-xVg&usg=AFQjCNHoUQFUZn7iH7fwVxOz9-WdcIpngA PolyOne Corporation Page 65 Megatrends Aligned with Key End Markets Increasing Energy Efficiency Protecting the Environment Improving Health and Wellness Megatrend End Markets Globalizing and Localizing Health & Wellness Transportation Packaging Consumer PolyOne Distribution PolyOne Corporation Page 66 Geographic Growth Opportunities • Currently 10% of POD’s revenue is generated from Mexico • Existing business is served “from the border” • New Mexico district & warehouse will drive transportation growth in Central Mexico • Expansion in China resulted from growing with our NA HC customers • Investing in sales deployments • Localizing supply • Gaining Share PolyOne Distribution PolyOne Corporation Page 67 Going Beyond Distribution WeatherTech® – Polymer BumpStep® BEDRUG™ – Tri-fold Truck Bed Cover CeQur PaQ – Type 2 Insulin Delivery Device PolyOne Distribution PolyOne Corporation Page 68 Platinum Vision 2.6% 4.6% 6.1% 6.5 - 7.5% 2006 2010 2014 2020 Platinum Vision World Class Distribution Margin Accelerating Growth PolyOne Distribution Market Growth/ Megatrends Commercial Investment Cross-Selling & Collaboration Growth in Targeted Areas PolyOne Corporation Page 69 Summary • Motivated and well trained POD sellers making the calls / collaborating with other PolyOne businesses • Representing a world class supplier line card • Delighted customers and suppliers who choose us to represent them PolyOne Distribution PolyOne Corporation Page 70 Financial Highlights Bradley C.

COMPENSATION DISCUSSION AND ANALYSIS PROXY STATEMENT 2024 | Annual Meeting of Shareholders 49 The 2023 Corporate and Business Segment Annual Plan weightings reflect adjustments from 2022 as follows: Corporate Annual Incentive Program Measure 2022 Weighting 2023 Weighting Adjusted Operating Income (Consolidated) 60% 70% Working Capital as a % of Sales 20% 20% Sustainability Objectives 20% 10% Business Segment Annual Incentive Program Measure 2022 Weighting 2023 Weighting Adjusted Operating Income (Consolidated) 20% 10.5% Adjusted Operating Income (Business Segment results) 40% 59.5% Working Capital as a % of Sales (Business Segment results) 20% 20% Sustainability Objectives 20% 10% We set appropriate performance goals in 2023 under the 2023 Annual Incentive Program that focused our efforts on those factors that we believed were critical to our ongoing success, including earnings improvement, cash generation from working capital, efficiencies in our operations, and the advancement of sustainability initiatives. Total attainment for these participants under the 2023 Annual Incentive Program was 52.5%, with the components consisting of (dollars in millions): COMPENSATION DISCUSSION AND ANALYSIS 50 PROXY STATEMENT 2024 | Annual Meeting of Shareholders 2023 Corporate Plan Annual Incentive Program* (Patterson, Beggs, Kunkle, Rathbun) Measure Weighting Threshold Target Maximum Results Payout % Adjusted Operating Income (consolidated) 70% $314.5 $338.6 $399.6 $312.8 0.0% Working Capital as a % of Sales 20% 12.4% 11.7% 10.7% 10.3% 200.0% Sustainability Objectives 10% See above disclosure for more information about  goals and achievements 125.0% Total Attainment 52.5% *Adjusted operating income (performance measures and results) reported in the table above was calculated with adjustments for special items (as noted on Appendix A) pursuant to the terms of the awards and as approved by the Compensation Committee. Although SARs granted in 2023, 2022 and 2021 would also be EXECUTIVE COMPENSATION 70 PROXY STATEMENT 2024 | Annual Meeting of Shareholders subject to prorata vesting in cases of retirement, disability or death, and full vesting in the case of an involuntary termination following a change in control, the table reflects a value of $0 for the SAR awards, as the grant price in each of these years exceeds the December 29, 2023 closing stock price

In 2023, Avient collected sustainable assessments for 70% of our total direct spend for sourcing. In 2023, Avient collected sustainable assessments for 70% of our total direct spend for sourcing. Avient successfully collected sustainable assessments for 70% of our total direct spend for sourcing.

COMPENSATION DISCUSSION AND ANALYSIS PROXY STATEMENT 2024 | Annual Meeting of Shareholders 49 The 2023 Corporate and Business Segment Annual Plan weightings reflect adjustments from 2022 as follows: Corporate Annual Incentive Program Measure 2022 Weighting 2023 Weighting Adjusted Operating Income (Consolidated) 60% 70% Working Capital as a % of Sales 20% 20% Sustainability Objectives 20% 10% Business Segment Annual Incentive Program Measure 2022 Weighting 2023 Weighting Adjusted Operating Income (Consolidated) 20% 10.5% Adjusted Operating Income (Business Segment results) 40% 59.5% Working Capital as a % of Sales (Business Segment results) 20% 20% Sustainability Objectives 20% 10% We set appropriate performance goals in 2023 under the 2023 Annual Incentive Program that focused our efforts on those factors that we believed were critical to our ongoing success, including earnings improvement, cash generation from working capital, efficiencies in our operations, and the advancement of sustainability initiatives. Total attainment for these participants under the 2023 Annual Incentive Program was 52.5%, with the components consisting of (dollars in millions): COMPENSATION DISCUSSION AND ANALYSIS 50 PROXY STATEMENT 2024 | Annual Meeting of Shareholders 2023 Corporate Plan Annual Incentive Program* (Patterson, Beggs, Kunkle, Rathbun) Measure Weighting Threshold Target Maximum Results Payout % Adjusted Operating Income (consolidated) 70% $314.5 $338.6 $399.6 $312.8 0.0% Working Capital as a % of Sales 20% 12.4% 11.7% 10.7% 10.3% 200.0% Sustainability Objectives 10% See above disclosure for more information about  goals and achievements 125.0% Total Attainment 52.5% *Adjusted operating income (performance measures and results) reported in the table above was calculated with adjustments for special items (as noted on Appendix A) pursuant to the terms of the awards and as approved by the Compensation Committee. Although SARs granted in 2023, 2022 and 2021 would also be EXECUTIVE COMPENSATION 70 PROXY STATEMENT 2024 | Annual Meeting of Shareholders subject to prorata vesting in cases of retirement, disability or death, and full vesting in the case of an involuntary termination following a change in control, the table reflects a value of $0 for the SAR awards, as the grant price in each of these years exceeds the December 29, 2023 closing stock price