Jul 10, 2025 Jul 07, 2025 May 14, 2025

Jul 10, 2025 Jul 07, 2025 May 14, 2025

Jul 10, 2025 Jul 07, 2025 May 14, 2025

Jul 10, 2025 Jul 07, 2025 May 14, 2025

Jul 10, 2025 Jul 07, 2025 May 14, 2025

Jul 10, 2025 Jul 07, 2025 May 14, 2025

The Compensation Committee maintained adjusted EPS as the performance measure for the 2023-2025 cash-settled performance unit awards in order to drive improvements in shareholder value. Requiring annual, as well as cumulative, performance goals helps ensure that adjusted EPS growth is a constant and visible incentive goal for our Named Executive Officers to achieve each year. 52 PROXY STATEMENT 2024 | Annual Meeting of Shareholders   Performance Period Weighting January 1, 2023 through December 31, 2023 25% January 1, 2024 through December 31, 2024 25% January 1, 2025 through December 31, 2025 25% January 1, 2023 through December 31, 2025 25% The attainment level for the cash-settled performance units will be certified at the end of the total three- year performance period. If the date of the 2025 Annual Meeting is delayed by more than 60 calendar days after the anniversary of the Annual Meeting, then a shareholder’s notice must be delivered to our principal executive offices not later than the close of business on the later of the 90th calendar day prior to the 2025 Annual Meeting or the 10th calendar day following the day on which public announcement of the date of the 2025 Annual Meeting is first made.

Certificate Number: Certificate expiration date: Effective date: 31-10-2022 30-10-2025 Expiry date of previous cycle: 30-10-2022 31-10-2016 ES133794 Scope of certification: MANUFACTURING OF MASTERBATCHES, ADDITIVES AND COMPOUNDS FOR PIGMENTING THERMOPLASTIC MATERIALS USED IN FOOD INDUSTRY ISO 22000:2018 POLIGONO INDUSTRIAL EZCABARTE, C/H, Nº3 - 31194 - ORICAIN - NAVARRA - ESPAÑA AVIENT ESPAÑA, S.L.

SmartHeat™ RHC AAzure™ Optica™ Ultimate™ UV390R APPLICATION PET process aid Acetaldehyde scavenger Heat stable, enhanced recyclability toners and colors Light barrier for PET FORMULATION Liquid dispersion Stand alone Triple A™ with SmartHeat RHC Heat stable dyes and carrier system with SmartHeat RHC USER Converters and rPET producers Converters (water) Converters and rPET producers Converters COLOR Colorless Slight blue tint or can be colored as required with the addition of Optica toners A range of blue colors and toners, also custom color solutions Green and amber colors also available Colorless RECYCLING APPLICATIONS APR accredited N/A N/A APR accredited COLORMATRIX ENHANCED RECYCLABILITY PORTFOLIO KEY BENEFITS • Corrects yellowing and balances color variation in PET preforms, bottles and rPET • Improves heat stability through the recycling process • Improves the quality and performance of rPET • Achieves improved mechanical strength in the bottle • Improves productivity, reduced blowouts, downtime and scrap rates in bottle blowing and filling • Reduces energy consumption • Supports the circular economy TARGET MARKET & APPLICATIONS PET preforms and rPET resin REGULATORY • EU - ✓ • FDA - ✓ • Mercosur - approved for use in Brazil with applicable use limitations Detailed information regarding food contact clearances available on request. 1.844.4AVIENT www.avient.com Copyright © 2025, Avient Corporation.

Body Weight Active LDR (ppm) —— Body Weight —— Max Load Bo dy W ei gh t ( g) M ax L oa d (lb s) Active LDR (ppm) —— Energy Consumption —— Energy Reduction En er gy C on su m pt io n (k W ) En er gy R ed uc tio n 0 10 25 0 17 34 51 30% 1.844.4AVIENT www.avient.com Copyright © 2025, Avient Corporation.