Buyer shall accept, as full and complete performance by Seller, deliveries in accordance with such determinations as Seller may make. These Terms, together with (i) the product description, quantity, price, and payment terms stated on Seller’s order confirmation, (ii) any credit agreement, and (iii) the Specifications, if any, constitute the complete and final agreement and understanding between Seller and Buyer relating to the Product and supersede all prior oral or written communications, agreements, understandings, representations, statements, and assurances between the parties.

GUIDANCE DEBT / LEVERAGE REDUCTION • Completed sale of Distribution and paid down $750M of debt in November • Strong free cash flow in fourth quarter reduced leverage and enabled paydown of additional $200M of debt • Fixed/Floating Debt Ratio 63/37 • Proven track record of deleveraging following acquisitions through consistent free cash flow generation $725 $725 $725 $575 $500 $400 $600 $525 $425 $650 $650 $650 $600 $2.40B $2.20B 2030 Notes 2029 Term Loan 2026 Term Loan 2025 Notes After Distribution Divestiture Year-End 4 Year-End Leverage 3.8x 3.1x 2.9x 2023 Notes After Avient Protective Materials Acquisition $3.15B 2022 TRANSFORMATIONAL PORTFOLIO ENHANCEMENTS 5 EBITDA margins expanded from 12% to 16% Diversified end markets with reduced exposure to more cyclical industries Dyneema® Acquisition $1.48B acquisition strengthens composites platform Significantly improved EBITDA margins $950M divestiture results in 100% specialty sales Strong exit multiple of 10x TTM EBITDA despite market volatility Distribution Divestiture Improved Portfolio GROWING COMPOSITES PLATFORM CONTRIBUTIONS TO SEM SEGMENT 6 Note: 2022 is pro forma for Avient Protective Materials 2016 Sales 2022 Sales Advanced Composites 51% $560M $1,300M Advanced Composites 9% COMPOSITES PORTFOLIO D Y N E E M A ® E X P A N D S O U R E N G I N E E R E D F I B E R S A N D T A P E S T E C H N O L O G Y LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers 7 ADVANCED COMPOSITES PERFORMANCE 8 (1) Pro forma for the acquisition of Avient Protective Materials Sales $51 $84 $212 $668 2016 2018 2020 2022 $4 $10 $41 $169 2016 2018 2020 2022 EBITDA (1) (1) ($ in millions) PORTFOLIO EVOLUTION AND EPS EXPANSION 9 Adj. Further, as a result of Avient's portfolio shift to a pure play specialty formulator, it has completed several acquisitions and divestitures which have resulted in a significant amount of intangible asset amortization.

11.866.POLYONE www.polyone.com MAXXAM™ FILLED & REINFORCED POLYOLEFINS PRODUCT SELECTION GUIDE 2 31.866.POLYONE www.polyone.com MAXXAM™ FILLED & REINFORCED POLYOLEFINS PolyOne manufactures a complete line of filled and reinforced polymer polyolefins for injection molding and blow molding. Focused on sustainable growth platforms, we support you with: • Twin-screw compounding, drum tumbler mixing, injection molding and compression molding • Full physical, analytical, weathering and burn testing capabilities designed to shorten the time to market for new products and applications • State-of-the-art innovation centers complete with customer meeting space for real time analysis and collaboration Our global experience in developing filled or fiber reinforced formulations provides unmatched value for you!

The Dutch government has set an ambitious goal for a complete circular economy by 2050.

In 2021, we successfully completed the pre-registration for UK REACH post Brexit. · Net zero (1.5C) aligned policies related to procurement decisions, supplier and regulatory engagement, decarbonzation pathways, product pipeline have not fully been established, but is something we are considering · Further enhancement of policies to support the due diligence efforts of M&A opportunities that include climate-related criteria may benefit our decision-making · In 2022, Avient instituted our first internal cost of carbon to better prioritize low-carbon investments · We are constructing a detailed decarbonization pathway aligned to our existing 2030 goal.

Total consideration paid by the Company to complete the APM Acquisition was $1.4 billion, net of cash acquired. We completed our testing of impairment as of October 1, noting no impairment in 2022, 2021 or 2020. Total consideration paid by the Company to complete the APM Acquisition was $1.4 billion, net of cash acquired.

Consequently, you should not consider any such list to be a complete set of all potential risks or uncertainties. Please submit your vote and proxy by internet or telephone, or complete, sign, date and return your proxy card or voting instruction card. In the event of a change of control, cash-settled performance units for which all performance periods are completed as of December 31, 2024 are valued at actual attainment, and cash-settled performance units for which all performance periods are not completed as of December 31, 2024 are valued at target attainment.

In 2024, we completed over 3,100 product carbon footprint calculations for our customers globally. We have completed over 100 waste minimization projects globally, driving site-specific and innovative solutions. All employees are required to complete annual web-based training, and we extend security controls to business partners.

Buyer will accept, as full and complete performance by Seller, deliveries in accordance with such determinations as Seller may make.

The Dutch government has set an ambitious goal for a complete circular economy by 2050.