May 14, 2025 May 14, 2025 May 06, 2025

Certification structure: MULTI-SITE Certification Date: 29 SEP 2023 Effective Date: 27 FEB 2025 Expiration Date: 27 SEP 2026 Revision Date: 05 MAR 2025 Dominic Townsend, President Page 1 of 5 Avon Lake Corporate Responsible Care Corporate Support Activities in Sr. Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources 33587 Walker Road Avon Lake OH 44012 United States Avon Lake, OH (SEM) Design and Manufacture of Specialty Engineered Thermoplastics 554 Moore Road Avon Lake OH 44012 United States Kornkamp 50 Ahrensburg Schleswig- Holstein 22926 Germany Avient Corporation - Albany Design and Manufacture of Colorants and Additives for Plastics 4 Rothwell Ave, PO Box 300-009 Auckland 0632 New Zealand Avon Lake Color Design and Manufacture of Specialty Engineered Thermoplastics 33587 Walker Road, Building 416 Avon Lake OH 44012 United States Avient Corporation Design and Manufacture of Specialty Engineered Thermoplastics Pol. Toluca 2000 Toluca Estado de México 50200 Mexico Page 4 of 5 Avient Corporation Design & Manufacture of Color, Additive Concentrate & Specialty Renaissance Industrial & Warehousing Complex, Unit No.

Avient Investor Day - December 4, 2024 Avient Q1 2025 Earnings - May 6, 2025  Mar 19, 2013

Avient Investor Day - December 4, 2024 Avient Q1 2025 Earnings - May 6, 2025  Dec 19, 2019

Avient Investor Day - December 4, 2024 Avient Q1 2025 Earnings - May 6, 2025  Nov 19, 2013

Director since: 2021 Age: 47 PROXY STATEMENT 2025 | Annual Meeting of Shareholders 19 Kerry J. 4) Based on 91,532,542 common shares outstanding as of February 28, 2025 Letter to our Shareholders 4.

Both parts are made of silica/glass or polymer 4. Binder • PET, Polyester, Kevlar yarns coated with Swellcoat (absorbs and blocks water) 2 3 4 5 7 6 8 9. Cable jacket/sheath– Made of PE 9 Fiber-Line Product PolyOne Materials F I B E R O P T I C A L G R O W T H D R I V E R S PolyOne Corporation 20 5G Networks  Enable lower latency, greater flexibility & efficiency  Installation of these networks are in the very early stages  Installation will start in urban hubs and will continue to expand into suburban and rural areas  By 2025, only 14% of the world will have 5G connections  Growth is expected over multi- year period 5G technology will be a leading growth driver in fiber optic cable for several years 10x Speed Increase & 8x More Antennae Required 5G vs. 4G PolyOne Corporation 21 Safety Technology Geography Service FinancialPeople Low EH&S risk profile New and complementary technologies Leverage our global footprint Strong customer relationships Foundational operating margins of 8-10% with ability to double Motivated team with a specialty culture I N V E S T - T O - G R O W M & A S T R A T E G Y PolyOne Corporation 22 Capture sourcing synergies Cross-sell & blend 8-10% operating margins I N V E S T - T O - G R O W M & A P L A Y B O O K Protect Retain employees Implement LSS to drive efficiency improvements Innovate with combined portfolio Safety First!

Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources Certification Date: 29 SEP 2023 Effective Date: 27 FEB 2025 Expiration Date: 27 SEP 2026 Revision Date: 05 MAR 2025 Dominic Townsend, President Page 1 of 5 Avon Lake Corporate Responsible Care Corporate Support Activities in Sr. Leadership, EHS&S-PS, Facility Services, Design & Development, Information Technology, Sourcing, Logistics, Legal, and Human Resources 33587 Walker Road Avon Lake OH 44012 United States Kornkamp 50 Ahrensburg Schleswig- Holstein 22926 Germany Avient Corporation - Albany Design and Manufacture of Colorants and Additives for Plastics 4 Rothwell Ave, PO Box 300-009 Auckland 0632 New Zealand Avon Lake Color Design and Manufacture of Specialty Engineered Thermoplastics 33587 Walker Road, Building 416 Avon Lake OH 44012 United States Avient Corporation Design and Manufacture of Specialty Engineered Thermoplastics Pol. Toluca 2000 Toluca Estado de México 50200 Mexico Page 4 of 5 Avient Corporation Design & Manufacture of Color, Additive Concentrate & Specialty Renaissance Industrial & Warehousing Complex, Unit No.

Fourth quarter and full year GAAP EPS from continuing operations of $(0.19) and $0.90  Fourth quarter and full year adjusted EPS fro

Avient Investor Day - December 4, 2024 Avient Q1 2025 Earnings - May 6, 2025  PolyOne IR Presentation - CFA - 11/19/13 - w Non GAAP