Performance: Metrics & Monitoring Safety First—Areas of Focus Risk Reduction 1,050 Risk assessments conducted 551 Preventative actions implemented Associate Engagement 99.5% Associate participation in safety engagement activity 99% Site SAFE assessments completed Continuous Improvement Global driver safety training & travel duty of care tool 500+ Ergonomic risks identified Implemented global “Gloves On” policy Sustainability Expanded RC14001 global certification to 48 sites(1) 112 EH&S Management System Certificates carried globally 65% Reduction in Severity of Injuries (3) Over Last 5 Years 5-6x Better Than Industry Average (2) 0.58 Incident Rate (1) RC14001 is a combination of ACC Responsible Care and ISO14001 principles (2) For Incident Rate comparison—See Safety First (page 19) (3) Severity rate includes days away from work and days on restricted duty HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | IndexHOME | Contents | Message from the CEO | About Us | People | Products | Plan Sustainability Report | 2023 21 Security Keeping Avient’s operations, infrastructure, and intellectual property protected is a vital task, as a breach in physical security at sites or cybersecurity could lead to risks to stakeholders and the sustainability of our enterprise. GRADUATES 331 GRADUATES 148 Leadership Development Training per Participant Over 50 Hours 0 100 200 300 400 500 NextGen & Elevate Program Participants 311 2013 2015 2017 2019 2021 2023 216 125 47 369 479 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Per formance | Metrics | Index Sustainability Report | 2023 33Sustainability Report | 2023 33 Competency Training In 2023, we launched a global training program focused on understanding the key behaviors in our Competency Model, and how to best leverage them for success in an associate’s current or future role.

Initiative category & Initiative type Waste reduction and material circularity Product/component/material reuse Estimated annual CO2e savings (metric tonnes CO2e) 21.68 Scope(s) Scope 3 Voluntary/Mandatory Voluntary Annual monetary savings (unit currency – as specified in C0.4) 252,874 Investment required (unit currency – as specified in C0.4) 500 Payback period

The ABL Amendment, among other things, (i) increased the Company’s total revolving credit line to $500 million (which may 48 AVIENT CORPORATION be increased by up to $150 million subject to the Company meeting certain requirements and obtaining commitments for such increase) (the Revolving Credit Facility), subject to the borrowing base limitations, (ii) extended the maturity date of the Revolving Credit Facility to October 26, 2026 (subject to certain exceptions), (iii) modified the borrowing base to include qualified cash subject to certain limitations, (iv) modified the applicable margin and the unused line fee to be based on availability, and (v) modified certain negative covenants to provide additional flexibility. Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received.

P O L Y O N E C O R P O R A T I O N P O L Y O N E C O R P O R A T IO N THIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILING P O L Y O N E C O R P O R A T IO N THIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILING PolyOne Stock Performance The following is a graph that compares the cumulative total shareholder returns for PolyOne’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index with dividends assumed to be reinvested when received. $0 $50 $100 $150 $250 12/31/1112/31/1012/31/0912/31/0812/31/07 POLYONE CORPORATION S&P 500 INDEX S&P MID CAP CHEMICALS 12/31/06 Comparison of Cumulative Total Return to Shareholders $200 STOCK EXCHANGE LISTING PolyOne Corporation Common Stock is listed in the New York Stock Exchange.

CCS CustomerCentricSelling 0 1000 2000 3000 4000 5000 6000 7000 8000 Associates Trained in LSS (Cumulative) LSS Projects Completed (Cumulative) 2009 2011 2013 2015 2017 2019 0 500 1000 1500 2000 2500 3000 3500 2009 2011 2013 2015 2017 2019 HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 24 Since 2013, the executive leadership selects 14–16 high performing, high potential associates each year to participate in the NextGen leadership development program.

CCS CustomerCentricSelling 0 1000 2000 3000 4000 5000 6000 7000 8000 Associates Trained in LSS (Cumulative) LSS Projects Completed (Cumulative) 2009 2011 2013 2015 2017 2019 0 500 1000 1500 2000 2500 3000 3500 2009 2011 2013 2015 2017 2019 HOME | Contents | Message from the CEO | Who We Are | People | Products | Planet | Performance | Goals & Metrics | Indices Sustainability Report | 2019 24 Since 2013, the executive leadership selects 14–16 high performing, high potential associates each year to participate in the NextGen leadership development program.

Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received.

Avient was again named one of America’s Most Responsible Companies in 2023 by Newsweek and Statista, moving up to the 22nd spot out of the top 500 listings.

PolyOne Stock Performance The following is a graph that compares the cumulative total shareholder returns for PolyOne’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received.

Avient Stock Performance The following is a graph that compares the cumulative total shareholder returns for Avient’s common shares, the S&P 500 index and the S&P Mid Cap Chemicals index, with dividends assumed to be reinvested when received.