STAN-TONE HCC-30760 GRASSY GREEN CSI-SB624 STRETCH BASE STAN-TONE DB-15597 HI LITE BLUE

STAN-TONE VCP-27890 YELLOW PX-V-203 187 RED M3122-BASE 50 A TRANSLU STAN-TONE DB-15597 HI LITE BLUE

STAN-TONE HCC-34204 BLUE GLS 302-174 Black Base STAN-TONE DB-15597 HI LITE BLUE

STAN-TONE HCC-34353 TEC MIST 939 X SR-02159-02 Laser Etch Base (2) STAN-TONE DB-15597 HI LITE BLUE

Water Street North Baltimore, OH 45872 U.S.A. has been assessed by ABSQuality Evaluations,Inc. and found to be in conformance with the requirements set forth by: RC14001®:2015 DESIGN AND MANUFACTURE OF CUSTOM PVC COMPOUNDS Certificate No: 55421 Effective Date: 20 November 2017 Expiration Date: 19 November 2020 Issue Date: 20 November 2017 Alex Weisselberg, President Validity of this certificate is based on the successful completion of the periodic surveillance audits of the management syst em defined by the above scope and is contingent upon prompt,written notification to ABS Quality Evaluations, Inc. of significant changes to the management system or components thereof.

STAN-TONE HCC-20332 BLUE RED BASE 200C STAN-TONE DB-15597 HI LITE BLUE

operating results due to the potential variability across periods based on timing, frequency and magnitude. Share-based compensation expense operating results due to the potential variability across periods based on timing, frequency and magnitude.

operating results due to the potential variability across periods based on timing, frequency and magnitude. Share-based compensation expense operating results due to the potential variability across periods based on timing, frequency and magnitude.

operating results due to the potential variability across periods based on timing, frequency and magnitude. Share-based compensation expense  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. Share-based compensation expense 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.