Pro Forma The Company acquired the Clariant Masterbatch business (“CMB”) on July 1, 2020 (the “Acquisition Date”). Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

STAN-TONE HCC-35933 PRO CHERRY STAN-TONE HCC-35938 PRO MTN BERRY STAN-TONE HCC-35941 PRO CLAY

Uncolored TPEs are naturally dark (typically in gray or brown), based on assorted colors from recycle streams  Can incorporate more natural sources to create a stronger sustainable story  If you’d like assistance evaluating the pros and cons of using sustainable TPEs in your applications, contact us.

Examples include: • Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy • Light-weighting solutions that replace heavier traditional materials like metal, glass and wood, which can improve fuel efficiency in all modes of transportation and reduce carbon footprint • Sustainable infrastructure solutions that increase energy efficiency, renewable energy, natural resource conservation and fiber optic / 5G network accessibility Avient employs approximately 9,300 associates and is certified ACC Responsible Care® and a founding member of the Alliance to End Plastic Waste. Ops Pro Forma $2.60 $2.95 Cont. Ops Pro Forma FULL YEAR 2022 GUIDANCE 24 Sales Adjusted EBITDA $3,375 $3,635 Cont.

Examples include: • Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy • Light-weighting solutions that replace heavier traditional materials like metal, glass and wood, which can improve fuel efficiency in all modes of transportation and reduce carbon footprint • Sustainable infrastructure solutions that increase energy efficiency, renewable energy, natural resource conservation and fiber optic / 5G network accessibility Avient employs approximately 9,300 associates and is certified ACC Responsible Care® and a founding member of the Alliance to End Plastic Waste. Ops Pro Forma $2.60 $2.95 Cont. Ops Pro Forma FULL YEAR 2022 GUIDANCE 24 Sales Adjusted EBITDA $3,375 $3,635 Cont.

STAN-TONE HCC-36030 PRO MTN BERRY STAN-TONE HCC-36033 PRO CLAY STAN-TONE HCC-36035 PRO SANDSTONE

OnColor™ Naturals Colorants PRODUCT DESCRIPTION OnColor™ Naturals is a range of colorants formulated with natural pigments derived from plants, flowers, roots and minerals. OnColor Naturals can help. A sophisticated mix of both pigments help deliver natural aesthetics from opaque to transparent and with a strong natural statement.

Comparisons to prior year fourth quarter and full year financial results herein are presented on a pro forma basis such that the prior periods include the business results of APM. Refer to Attachment 7 Reconciliation of Non-GAAP Financial Measures for details regarding adjustments to previously reported results to arrive to the pro forma financial metrics. See Attachment 3 for a definition and summary of special items and Attachment 7 for a summary of pro forma adjustments associated with the APM Acquisition.

Clay Aquamix 186 65 Partitioning agent or filler for natural or synthetic waterborne polymers. Rutile Titanium Aquamix 124 60 White colorant and fi ller for natural and synthetic polymers. Rutile Titanium Aquamix 124 60 White colorant and fi ller for natural and synthetic polymers.

Unless otherwise noted herein, all comparisons to prior year results are pro forma* for the Clariant Masterbatch acquisition. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.