OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. Patterson 2/08/2021 — — — — — 47,414 1,971,000 2/14/2022 — — — — — 40,165 1,669,659 2/17/2023 — — — — — 48,002 1,995,443 5/15/2014 — — — — — 60,421 2,511,701 2/14/2018 31,516 — — 41.89 2/14/2028 — — 2/11/2019 51,150 — — 31.54 2/11/2029 — — 2/10/2020 115,033 — — 31.48 2/10/2030 — — 2/08/2021 118,466 59,234 — 42.27 2/08/2031 — — 2/14/2022 — — 134,700 52.64 2/14/2032 — — 2/17/2023 — — 158,450 42.93 2/17/2033 — — (1) Amounts in these columns represent stock-settled SARs that vest in one-third increments, with each one-third increment vesting on the later of (a) the first, second and third anniversary of the grant date, respectively and (b) the achievement of a stock price hurdle (based on Avient’s closing stock price and sustained for thirty consecutive trading days for all grants except the February 17, 2023 grant for which the stock price hurdle must be sustained for twenty consecutive trading days) applicable to that increment. Each share is entitled to one vote.

ROYAL BLUE W/UV 2 16777-2 EXPB90F0 BLACK 2880 BLACK WATER PE 2

PolyOne Strand Coat Base

At K 2016, Avient exhibited under its former name, PolyOne.

NOTE: On July 1, 2020, PolyOne and Clariant Masterbatches joined together as Avient, a new kind of materials company focused on conquering customer challenges and unlocking the potential for innovation and sustainability around the globe.

BLACK LG PPG Plasticomp UV/HG 2 8% LDR PE BLACK W/UV 2

Explore how floating solar power stations get weathering protection from anti-uv color concentrate Smartbatch™ formulations blend design and function in one masterbatch solution  OnColor™ RC Environmental Black Color Concentrate

Thursday, November 2, 2023 Thursday, November 2, 2023 A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year.

UV AMBER TRANS BLACK BLACK UV/AM 2

Explore how floating solar power stations get weathering protection from anti-uv color concentrate Smartbatch™ formulations blend design and function in one masterbatch solution  OnColor™ RC Environmental Black Color Concentrate