FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 1-440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP North Point Tower II, Suite 1800 1001 Lakeside Ave Cleveland, OH 44114 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com. THIS PAGE IS NOT PART OF AVIENT’S FORM 10-K FILING THIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILINGTHIS PAGE IS NOT PART OF POLYONE’S FORM 10-K FILINGTHIS PAGE IS NOT PART OF AVIENT’S FORM 10-K FILING Reconciliation of Non-GAAP Financial Measures (Unaudited) (In millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results. Year Ended December 31, 2024 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 169.5 $ 1.84 $ 75.8 $ 0.83 Special items, after-tax 15.9 0.17 79.3 0.86 Amortization expense, after-tax 59.5 0.65 61.5 0.67 Adjusted net income / EPS $ 244.9 $ 2.66 $ 216.6 $ 2.36 (1) Per share amounts may not recalculate from figures presented herein due to rounding Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations – GAAP $ 170.7 $ 76.3 Income tax expense 54.1 11.0 Interest expense 105.6 115.3 Depreciation and amortization from continuing operations 179.7 188.8 EBITDA from continuing operations $ 510.1 $ 391.4 Special items, before tax 20.1 114.6 Interest expense included in special items (2.3) (2.3) Depreciation and amortization included in special items (1.5) (1.9) Adjusted EBITDA $ 526.4 $ 501.8 Adjusted EBITDA as a percent of sales 16.2 % 16.0 % Corporate Officers Ashish K.

Unless otherwise stated, Adjusted EBITDA figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases. In addition, operating income before the effect of special items is a component of Avient’s annual incentive plans and is used in debt covenant computations. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures.

Unless otherwise stated, Adjusted EBITDA figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases. In addition, operating income before the effect of special items is a component of Avient’s annual incentive plans and is used in debt covenant computations. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures.

Unless otherwise stated, Adjusted EBITDA figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases. Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 2 O P E N I N G R E M A R K S DR. In addition, operating income before the effect of special items is a component of Avient’s annual incentive plans and is used in debt covenant computations.

Unless otherwise stated, Adjusted EBITDA figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases. In addition, operating income before the effect of special items is a component of Avient’s annual and long-term employee incentive plans and is used in debt covenant computations. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures.

Specialization Our specialization activity was highlighted by the acquisition close and expedited integration of Spartech. As required by law and regulation, the court ordered publication for public comment. Once the court enters the Consent Order, the Company will pay the penalty and complete installation of the SEPs.

To obtain comparability based on company size, the Consultant’s analysis either referenced a specific sample of comparably-sized companies or calibrated the pay of a broad sample of companies against company size. In addition, in order to receive payments under the Executive Severance Plan, the Named Executive Officer must execute a release of claims against us and is subject to confidentiality, non-compete, non-solicitation and non- disparagement covenants during the two-year severance period. Our proxy materials for the Annual Meeting will be released to shareholders beginning March 27, 2024.

Avient has introduced a special liquid color production system that could be a good fit if you are ordering small lots of colorant. There are certain manufacturing limitations that prevent the use of some special effects, select resin types, or specific high color tolerances. Learn more about Avient's ColorMatrix™ SOS Small Order Service

Once the framework is established, the development process kicks into high gear, utilizing a comprehensive toolbox of cutting-edge technologies: • Mood boards for conceptualization • Extensive color libraries, both physical and digital • Rapid prototyping and sampling • Photorealistic 3D rendering • Accurate cost and feasibility assessment tools This iterative process allows for quick turnarounds and efficient approvals, ensuring that the final product meets all expectations. Additional Services • Color consultation to select or develop quick color and effect concepts • Polymer technology consultation to find solutions for technical and material challenges • Prototyping and sampling to best visualize color and effect considering polymer type, shape, and texture • Brand color management to ensure global color consistency • Color education and training to impart plastic coloration knowledge to non-experts • ColorForward™ color trend forecasting tool to provide insights into the CMF concepts expected to trend in the coming years Capabilities Multi-disciplinary Expertise Experts in CMF, industrial and conceptual design, color trends, polymer and color technology, formulation Extensive Toolbox Extensive color libraries and trend books, mood board creation, physical/virtual prototyping, cost evaluation, technical feasibility evaluation, sampling Valuable Networking Internal networking with Avient departments such as Avient Design, marketing, product safety, color matching labs, technology, sustainability group and external networking with designers, color associations, consultants, raw material providers Strategic Locations Locations in Asia, EMEA, Latin America and the U.S. 1.844.4AVIENT www.avient.com Copyright © 2025, Avient Corporation.

Avient can custom formulate materials for 5G antennas that meet specified dielectric constant (Dk) values, sample within one week, and deliver on production quantities within two to three weeks. HOW AVIENT CUSTOM POLYMER FORMULATIONS MAKE THE DIFFERENCE FOR 5G BASE STATION ANTENNA PHASE SHIFTS Faster Design Qualification & Shorter Lead Times – Avient can custom formulate materials to specific Dk values, sample within one week, and deliver on production quantities within two to three weeks. Faster Speed-to-Market and Increased Design Flexibility – The sampling and validating of thermoplastic formulations is faster than that of traditionally used materials such as ceramics or printed circuit boards (PCB).