March 2023

Executive Vice President and Chief Operating Officer, March 2012 to May 2014. Senior Vice President, Chief Commercial Officer, April 2016 to March 2020. The amendments in ASU 2020-04 are effective through December 31, 2022; however, ASU 2022-06, Reference Rate Reform: Deferral of the Sunset Date of Topic 848 has extended the effective date through December 31, 2024.

Avient 2024 Annual Report Form 8937 - May 2024 Avient Investor Presentation Longbow Basic Materials Conference - March 2016

Chemically resistant replacement for FR PC/ABS, FR PC/PET & FR COPE providing UL 94 Yellow Card V-0 flame rating at 1.5 mm, V-1 at 0.75 mm thicknesses for a broad color spectrum Explore What's Possible Explore What's Possible

The relative shear rate is determined by the fill time. This pressure control is what helps fill and pack material into the mold. This type of packing is what gives the part a good surface finish.

Key questions for deciding on a FlexCart Nano unit include the type of operation involved and what your process requires: • Is the process non-continuous? What is the range of liquid addition rate? throughput (kg/hr) 50 Max. metering rate (cc/s) 1.8 Continuous use No Transfer pumps N/A Metering pumps Peri Interchangeable cassette No Note: Peri = Peristatic Pump PLANETPAK™ CONTAINERS The FlexCart range of metering systems is designed to work with the standardized Avient range of packaging, typically achieving 99% reliable yield on continuous operating systems, and at the same time achieving a sustainable packaging format in terms of full recyclability.

March 29, 2023 For the Board of Directors Lisa K. The information below is current as of March 14, 2023. This information is as of March 1, 2023.

What is rPET? What’s Up Next for rPET? What’s Up Next for rPET?

Microsoft PowerPoint - AVNT Q3 2024 Earnings Presentation_10.29_12PM AVIENT CORPORATION T H I R D Q U A R T E R 2 0 2 4 R E S U L T S A N D 2 0 2 4 F I N A N C I A L G U I D A N C E (NYSE: AVNT) O C T O B E R 3 1 , 2 0 2 4 D I S C L A I M E R Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 2 3 Q3 2024 HIGHLIGHTS • 8.5% organic sales growth driven by broad-based growth across all regions and most end markets in both CAI and SEM segments • Growth stemmed from gaining share, winning new product specifications and restocking in certain end markets • Both segments expanded YoY EBITDA margins by 40 bps each • Adjusted EPS of $0.65, an increase of 14% vs the prior year • Successfully refinanced $650M outstanding senior notes due 2025; extending maturity to 2031 • Increased dividend 5% to $1.08 on an annualized basis; 14th consecutive increase Adj.