Committed financing for the acquisition is being provided by Morgan Stanley and J.P. To participate in the audio-only portion of the call, dial 1-844-835- 7433 (domestic) or 1-914-495-8589 (international) and provide conference ID number 4774915. To listen to this recording, dial 1-855-859- 2056 (domestic) or 1-404-537-3406 (international) and provide conference ID number 4774915.

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. Management believes this provides comparability of the performance of the combined businesses. A reconciliation of these measures to their most directly comparable GAAP measures is provided in the tables below.

PolyOne Corporation, with 2013 revenues of $3.8 billion, is a premier provider of specialized polymer materials, services and solutions. Net cash provided by operating activities Net cash provided (used) by financing activities

will provide additional details on its 2025 first quarter and its 2025 full year outlook during its webcast scheduled for In doing so, we innovate solutions that help our customers overcome their challenges or capitalize on opportunities provided by the fast-changing world and secular trends. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the

https://entreprises.revenuquebec.ca/EntNa/SX/SX00/SX00.SXCLT20A You can use this service to validate a business’s QST registration number. You can also use this service to validate the QST registration number of a supplier outside Québec.

The Board of Directors has ultimate responsibility for matters related to governance and corporate responsibility, and the Governance and Corporate Responsibility Committee provides oversight and guidance with regard to how the Board and management evaluate and integrate corporate responsibility and sustainability into Avient’s business strategy, decision-making and stakeholder communication, including this Position on Human Rights. We define child labor as services by anyone under the age of 16 and, if local law is more restrictive than our policy, we will comply with the more restrictive local law. Our goal is to provide fair and competitive compensation and benefits to all of our associates.

Develop and maintain a competitive executive compensation program in order to attract and retain qualified executives and to provide incentives to management that reward pay for performance in attaining the Company’s goals and objectives. 2 • Review and approve a peer group of companies to be used for marketplace trend analysis and to assess the competitiveness of the Company’s total compensation opportunities for executive officers The Company must provide for appropriate funding, as determined by the Committee, for payment of reasonable compensation to a compensation consultant, independent legal counsel or any other adviser retained by the Committee Independence Assessment of Outside Advisers • The Committee may select a compensation consultant, legal counsel or other adviser to the Committee or receive advice from a compensation consultant, legal counsel or other adviser (other than in-house legal counsel or any compensation consultant, legal counsel or other adviser whose role is limited to the following activities for which no disclosure would be required under Item 407(e)(3)(iii) of Regulation S-K: consulting on any broad-based plan that does not discriminate in scope, terms, or operation, in favor of executive officers or directors of the Company, and that is available generally to all salaried employees; or providing information that either is not customized for a particular company or that is customized based on parameters that are not developed by the compensation consultant, and about which the compensation consultant does not provide advice) only after taking into consideration all factors relevant to that person’s independence from management, including the following: • the provision of other services to the Company by the employer of the compensation consultant, legal counsel or other adviser; 5 • the amount of fees received from the Company by the employer of the compensation consultant, legal counsel or other adviser, as a percentage of the total revenue of the employer of the compensation consultant, legal counsel or other adviser; • the policies and procedures of the employer of the compensation consultant, legal counsel or other adviser that are designed to prevent conflicts of interest; • any business or personal relationship of the compensation consultant, legal counsel or other adviser with a member of the Committee; • any stock of the Company owned by the compensation consultant, legal counsel or other adviser; and • any business or personal relationship of the compensation consultant, legal counsel, other adviser or the employer of the adviser with an executive officer of the Company

Avient does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for Adjusted EBITDA and Adjusted Earnings Per Share, to the most comparable GAAP financial measures on a forward-looking basis because Avient is unable to provide a meaningful or accurate calculation or estimation of reconciling items and the information is not available without unreasonable effort. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 3 AVIENT OVERVIEW OUR VISION: Creating specialized and sustainable materials solutions that transform customer challenges into opportunities, bringing new products to life for a better world 2023 Financial ResultsCompany Overview Revenue By: 9,300 Employees 102 Manufacturing Sites 20,000+ Customers Key Highlights  Premier formulator of specialized and sustainable materials solutions  Asset-light business model, with flexibility to adapt to customer needs  Best-in-class technology and service (140+ PhDs / 2,500+ patents)  History of transformation through successful M&A while consistently returning cash to shareholders  Poised for continued future growth in excess of GDP $3.14B Revenue $2.36 $502M Adjusted EBITDA 16.0% Adjusted EBITDA Margins $186M Adjusted Free Cash Flow Over $1B in share buybacks since 2011 Raised dividend for 13 consecutive years, a 15% CAGR since 2011 U.S. & Canada 64% Specialty Engineered Materials Color Additives and Inks 41% 23% 19% 10% 5% 4% Building & Energy Telecom Geography Segment Industry CREATING A WORLD-CLASS SUSTAINABLE ORGANIZATION 1. 6% annualized long term sales growth leveraging sustainable solutions, composites, healthcare and emerging regions 2. A reconciliation of these measures to their most directly comparable GAAP measures is provided in the tables below. 2024 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 49.4 $ 0.54 $ 20.8 $ 0.23 Special items, after-tax 5.5 0.06 22.3 0.24 Amortization expense, after-tax 14.9 0.16 15.1 0.16 Adjusted net income / EPS $ 69.8 $ 0.76 $ 58.2 $ 0.63 Three Months Ended Reconciliation to EBITDA and Adjusted EBITDA 2024 2023 Net income from continuing operations – GAAP $ 49.7 $ 21.3 Income tax expense 16.8 7.7 Interest expense, net 26.6 28.8 Depreciation and amortization 44.3 50.5 EBITDA from continuing operations 137.4 108.3 Special items, before tax 6.2 27.3 Depreciation and amortization included in special items (0.5) (1.8) Adjusted EBITDA $ 143.1 $ 133.8 Adjusted EBITDA as a percent of sales 17.3 % 15.8 % 1 2024 2023 Sales: Color, Additives and Inks $ 515.3 $ 537.0 Specialty Engineered Materials 314.4 309.7 Corporate (0.7) (1.0) Sales $ 829.0 $ 845.7 Operating income: Color, Additives and Inks $ 74.8 $ 65.6 Specialty Engineered Materials 53.4 43.1 Corporate (34.2) (51.6) Operating income $ 94.0 $ 57.1 Depreciation & amortization: Color, Additives and Inks $ 21.9 $ 25.8 Specialty Engineered Materials 19.6 21.2 Corporate 2.8 3.5 Depreciation & amortization $ 44.3 $ 50.5 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 96.7 $ 91.4 Specialty Engineered Materials 73.0 64.3 Corporate (31.4) (48.1) Other (expense) income, net (0.9) 0.7 EBITDA from continuing operations 137.4 108.3 Special items, before tax 6.2 27.3 Depreciation and amortization included in special items (0.5) (1.8) Adjusted EBITDA $ 143.1 $ 133.8 Adjusted EBITDA as a percent of sales: Color, Additives and Inks 18.8 % 17.0 % Specialty Engineered Materials 23.2 % 20.8 % December 31, 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS Net income from continuing operations attributable to Avient shareholders $ 75.8 $ 0.83 Special items, after-tax 79.3 0.86 Amortization expense, after-tax 61.5 0.67 Adjusted net income / EPS $ 216.6 $ 2.36 Free Cash Flow Calculation December 31, 2023 Cash provided by operating activities $ 201.6 Taxes paid on gain on sale of business 104.1 Adjusted cash provided by operating activities 305.7 Capital expenditures (119.4) Free cash flow $ 186.3 Year Ended December 31, 2023 Sales: Color, Additives and Inks $ 2,007.4 Specialty Engineered Materials 1,138.2 Corporate (2.8) Sales $ 3,142.8 Operating income: Color, Additives and Inks $ 259.9 Specialty Engineered Materials 142.5 Corporate (205.6) Operating income $ 196.8 Depreciation & amortization: Color, Additives and Inks $ 98.3 Specialty Engineered Materials 81.5 Corporate 9.0 Depreciation & amortization $ 188.8 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 358.2 Specialty Engineered Materials 224.0 Corporate (196.6) Other income, net 5.8 EBITDA from continuing operations 391.4 Special items, before tax 114.6 Interest expense included in special items (2.3) Depreciation and amortization included in special items (1.9) Adjusted EBITDA $ 501.8 Adjusted EBITDA as a percent of sales 16.0 % 3 Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2006 2014 Sales $ 2,622.4 $ 3,835.5 Net income from continuing operations – GAAP $ 133.5 $ 77.2 Income tax expense 29.7 11.2 Interest expense, net 63.1 62.2 Depreciation and amortization 57.1 123.9 EBITDA from continuing operations 283.4 274.5 Special items, before tax (34.0) 164.9 Depreciation and amortization included in special items — (23.1) Joint venture equity income (107.0) — Adjusted EBITDA $ 142.4 $ 416.3 Adjusted EBITDA as a percent of sales 5.4 % 10.9 % Year Ended December 31, Reconciliation of Adjusted EPS: 2006 2014 Net income from continuing operations attributable to Avient common shareholders $ 130.9 $ 78.0 Joint venture equity earnings, after-tax (68.5) — Special items, after-tax (21.2) 101.0 Special items, tax adjustments (30.0) (10.5) Amortization expense, after-tax 1.4 12.4 Adjusted net income from continuing operations attributable to Avient common shareholders $ 12.6 $ 180.9 Diluted shares 92.8 93.5 Adjusted EPS attributable to Avient common shareholders $ 0.14 $ 1.93 AVNT Q1 2024 Investor Presentation_w Non-GAAP.pdf IR Deck - AVNT-2024.03.31 5.09 4PM.pdf Attachment

Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: • disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; • the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; • disruptions or inefficiencies in our supply chain, logistics, or operations; • changes in laws and regulations in jurisdictions where we conduct business, including with respect to plastics and climate change; • fluctuations in raw material prices, quality and supply, and in energy prices and supply; • demand for our products and services; • production outages or material costs associated with scheduled or unscheduled maintenance programs; • unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; • our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; • information systems failures and cyberattacks; • our ability to service our indebtedness and restrictions on our current and future operations due to our indebtedness; • amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; • other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation, geopolitical conflicts, and any recessionary conditions; and • other factors described in our Annual Report on Form 10-K under Item 1A, “Risk Factors.” You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. Avient does not provide reconciliations of forward-looking non-GAAP financial measures, such as outlook for Adjusted EBITDA and Adjusted Earnings Per Share, to the most comparable GAAP financial measures on a forward- looking basis because Avient is unable to provide a meaningful or accurate calculation or estimation of reconciling items, and the information is not available without unreasonable effort.

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 Avient Corporation HQ Responsible Care Corporate Support Activities in Sr. Water Street North Baltimore OH 45872 United States NEU Specialty Engineered Materials, LLC Compound, Supply, and Prototyping Services of Thermoplastics 15 Corporate Drive North Haven CT 06473 United States Avient Corporation Design and Manufacture of Colorants and Additives for Plastics 80 North West Street Norwalk OH 44857 United States Page 3 of 5 Avient Corporation Manufacture of Masterbatches, Additives, ECCOH, and Compounds for Pigmenting Thermoplastic Pol.