OUR CODE OF CONDUCT ISSUED OCTOBER 2024 TABLE OF CONTENTS Introduction: A Message from the CEO 1 Our Code of Conduct Guidelines for Ethical Behavior 3 Personal Values 3 Your Responsibilities 4 Additional Responsibilities of Avient Supervisors and Managers 4 Resolving Questions and Reporting Non-Compliance Situations 5 Ethics Hotline 5 Non Retaliation 6 Code of Conduct Application 6 Violations of the Code 6 Respect for All Diversity and Inclusion 8 Discrimination or Harassment 8 Workplace Relationships 9 Substance Abuse 10 Physical Security and Workplace Violence 10 Honesty at Work Accurate Information, Data and Records 12 Accounting Integrity 12 Company Communications 14 Safeguarding and Use of Assets 14 Proprietary and Confidential Information, Ideas and Intellectual Property 15 Privacy, Personal Information and Data Protection 16 Internet and E-mail Use 16 Social Media and Social Networking 17 Computer Security, Software Licensing and Copyrights 17 Insider Information and Trading 18 Political Contributions/Activities and Charitable Contributions 19 Government Investigations and Inquiries 19 Integrity in Our Business Fair Dealing 21 Bribery and Kickbacks 21 Agents and Consultants 22 Competition 22 Gifts and Hospitality 23 Conflicts of Interest 24 Self-Dealing 25 International Trade 25 Money Laundering 25 Corporate Social Responsibility Sustainability 27 Safety, Health and Environment 28 Product and Service Safety 29 Respecting Human Rights 29 A Shared Commitment 29 Resources and Contact Information Our Policies 30 Internal Contacts 30 Ethics Hotline 30 A Message from the CEO Dear Avient Team, Our company decisions have far-reaching implications in today’s complex and interconnected world. TABLE OF CONTENTS INTRODUCTION OUR CODE OF CONDUCT RESPECT FOR ALL HONESTY AT WORK INTEGRITY IN OUR BUSINESS CORPORATE SOCIAL RESPONSIBILITY RESOURCES CODE OF CONDUCT | 3 Your Responsibilities • Know and follow the Code and all laws, regulations and policies that apply to your work at Avient • Be honest and professional in all your work on behalf of the Company Follow these two simple rules: 1.

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). Reconciliation to Adjusted EPS Excluding Special Items and Impacts of February 2020 Equity Offering Three Months Ended March 31, 2020 Net income from continuing operations – GAAP $ 33.1 Special items, after tax (1) 8.6 After tax interest income earned on equity proceeds, included in Interest expense, net (0.7) Adjusted net income excluding special items and impact of interest income on equity proceeds $ 41.0 Diluted weighted-average shares used to compute earnings per common share 86.7 Weighted-average impact of 15.3 million shares issued in February 2020 equity offering (9.3) Diluted weighted-average shares excluding impact of shares issued in February 2020 equity offering 77.4 Adjusted EPS - excluding special items and the net impact of equity offering $ 0.53 Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to PolyOne shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to PolyOne shareholders, excluding special items, to assess performance and facilitate comparability of results.

Collimators are used in radiology treatment to limit X-ray beams to the dimensions and angular spread required.  Mecall, part of the GMM Group, is a leading manufacturer of X-ray equipment for the healthcare industry including radiographic systems, digital angiography equipment, remote-controlled tilting systems and more. Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com

General-purpose screw with compression ratio of 2:1 to 3:1 can be used Suggested nozzle diameters are 1/16" (0.0625" or 1.59 mm) to 3/16" (0.1875" or 4.76mm) To achieve the benefits of shear thinning the injection speed should be adjusted to fill the mold in 1 - 3 seconds.

Multi-family new construction starts are down roughly 30% YOY, while single-family starts are down over 3% in the same period. FR COMPOSITE PANELS BEYOND PRICE TAGS FULL SPEED AHEAD ONE-STEP FIRE SAFETY STRENGTH YOU CAN COUNT ON Solving for X Modular construction presents several puzzles: How do you lower costs without cutting corners? That means fewer steps in your process and one less thing to worry about. 1 Test reports available upon request BEYOND PRICE TAGS FULL SPEED AHEAD ONE-STEP FIRE SAFETY STRENGTH YOU CAN COUNT ON FR COMPOSITE PANELS BEYOND PRICE TAGS FULL SPEED AHEAD ONE-STEP FIRE SAFETY STRENGTH YOU CAN COUNT ON • Full Speed Ahead: In modular construction, every saved hour counts.