FX) 2022 GROWTH PROJECTIONS 19 $3.05 $3.50 2021 2022E Full Year – Adjusted EPS + 15% (+ 17% excluding FX) $0.89 $0.95 2021 2022E Q1 – Adjusted EPS + 7% (+ 10% excluding FX) ($ millions) Q1 Full Year Q1 Full Year 2021 - Actual 1,162$ 4,819$ 123$ 429$ Sustainable Solutions 27 110 12 44 Healthcare 15 66 4 13 Composites (excl.Outdoor High Performance) 11 29 5 13 Outdoor High Performance Applications (7) (20) (4) (10) Growth in Asia / LATAM 10 51 3 11 Other 57 115 9 12 Sub-total 1,275$ 5,170$ 152$ 512$ Wage Inflation and Overtime (12) (18) Other Supply Chain Costs (4) (7) FX Impact (25) (70) (4) (8) Synergies 4 15 Travel, Other Employee Costs (1) (4) 2022 - Estimated 1,250$ 5,100$ 135$ 490$ Adjusted 2022 SALES AND OI – Q1 AND FULL YEAR 20 ($ millions) 2021 2022E Cash Flow from Operating Activities 234$ 385$ Less: Run-Rate CapEx (86) (90) CapEx for Clariant Integration (15) (20) CapEx for IT System Upgrade - (25) Total CapEx (101) (135) Free Cash Flow 133$ 250$ Adjusted EBITDA 581$ 635$ Net Debt / Adjusted EBITDA 2.2x 1.8x 21 CASH FLOW / LEVERAGE 22 • Record results – highest level of sales ($4.8B) and earnings ($3.05 adjusted EPS) in company history • Successful Clariant Color integration – net debt to adjusted EBITDA reduced to 2.2x, one-year ahead of schedule • Recognized as one of America’s Most Responsible Companies by Newsweek • Earned 3rd consecutive Great Place to Work certification 2021 HIGHLIGHTS 23 • 15% adjusted EPS growth to $3.50, led by growth in sustainable solutions and increased synergy realization • Continued strong synergy capture from the Clariant Color integration: $75M anticipated run-rate synergies by the end of 2022 • Adjusted EBITDA of $635M represents 9% growth above 2021 – 11% excluding the impact of foreign currencies • Deleveraged to 1.8x net debt to adjusted EBITDA by the end of 2022 2022 SUMMARY PEER COMPARISONS 25 As a specialty formulator, we don’t require significant capital investment, as compared to the base resin raw material suppliers we purchase from.

Our key development opportunities include nomination-based leadership programs (such as NextGen, Emerging Leaders and Elevate), foundational leadership training for all current or aspiring people managers, called Core Leadership, and LSS training at a variety of levels, where individuals can be certified for job-specific LSS programs, up through Master Black Belt certification. We are proud to share that our associates feel we are a Great Place to Work® and, in 2023, we received our fifth certification. The “People” metric considered both (1) the results of our 2023 Great Places to Work® employee engagement survey (and whether the results resulted in certification by Great Places to Work and an improvement over the prior year’s scores), and (2) the percentage of employees who participated in a safety activity during the year.

Microsoft Word - Q4 release 2.14.23 430PM 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Fourth Quarter and Full Year 2022 Results • Fourth quarter and full year GAAP EPS from continuing operations of $(0.19) and $0.90 • Fourth quarter and full year adjusted EPS from continuing operations of $0.39 and $2.69 exceeds prior guidance of $0.29 and $2.60 due to better-than-expected orders for personal protection products from Avient Protective Materials (“APM”) and cost reductions • On a pro forma basis, fourth quarter and full year adjusted EPS of $0.42 and $3.04 exceeded prior guidance of $0.33 and $2.95, respectively • Strong working capital performance to finish the year resulted in cash flow from operations of approximately $400 million for 2022; full year free cash flow of approximately $290 million • Paid down additional $200 million of debt for a year-end net debt-to-adjusted EBITDA of 2.9x which improved from prior projections • Earned fourth Great Place to Work® certification, achieving the highest employee engagement scores in the history of the company CLEVELAND – February 15, 2023 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable solutions, today announced its fourth quarter and full year results for 2022.

Our key development opportunities include nomination-based leadership programs (such as NextGen, Emerging Leaders and Elevate), foundational leadership training for all current or aspiring people managers, called Core Leadership, and LSS training at a variety of levels, where individuals can be certified for job-specific LSS programs, up through Master Black Belt certification. We are proud to share that our associates feel we are a Great Place to Work® and, in 2023, we received our fifth certification. The “People” metric considered both (1) the results of our 2023 Great Places to Work® employee engagement survey (and whether the results resulted in certification by Great Places to Work and an improvement over the prior year’s scores), and (2) the percentage of employees who participated in a safety activity during the year.

In deciding on a review or audit, the data exporter may take into account relevant certifications held by the data importer. In deciding on a review or audit, the data exporter may take into account relevant certifications held by the data importer.

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance, or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Seller warrants good and clear title in goods subject to the sale (“Product”) and that the Product conforms at the time of shipment to a Certificate of Analysis, a Certificate of Compliance or a Product Specification Sheet, if any such document exists, and other specifications signed by Seller (“Specifications”).

Pursuant to the policy, any nominee for election as a Director of the Board who receives a greater number of votes “withheld” from his or her election than votes “for” his or her election in an election of Directors that is not a contested election is expected to tender his or her resignation as a Director to the Board promptly following the certification of the election results. COMPENSATION DISCUSSION AND ANALYSIS 44 PROXY STATEMENT 2022 | Annual Meeting of Shareholders 2021 Company performance highlights include: • Full-year 2021 EPS from continuing operations was $2.51, compared to $1.46 in 2020, an increase of 72%; • Record sales growth of 27% over 2020 to $4.8 billion; • Increased adjusted EPS 58% from $1.93 (pro forma for the Clariant Color acquisition) to $3.05(1) driven by demand for sustainable solutions, healthcare applications and composites technologies; • Increased our dividend on an annualized basis by 12% to $0.95; the 11th consecutive year of annual increase; • Our 0.55 injury incident rate (per 100 full-time workers per year) is world-class in our industry; • Certified once again as an ACC Responsible Care® organization for outstanding environmental, health and safety performance; • Continued our journey of improving our culture: received our 3rd consecutive certification as a Great Place to Work® by the Great Place to Work Institute; joined the United Nations Global Compact; and recognized as one of America's Most Responsible Companies by Newsweek; • The SEM business delivered record operating income of $132 million, up 40% from 2020, driven by high demand for our composites and other specialty solutions serving the consumer and healthcare end markets; • The CAI business grew revenue 18% and operating income 34%. With respect to the Clariant Color Integration Objectives described above, the Committee determined all objectives had been met or exceeded as we prioritized safety training and education and retained ACC Responsible Care certification, grew revenue and cross-selling leads, successfully engaged employees, achieving our third consecutive certification as a Great Place to Work® by the Great Place to Work Institute, and achieved $54 million of cost synergies.

SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about PolyOne, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.polyone.com or free of charge from: Investor Affairs Relations PolyOne Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1000 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 14, 2020 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.