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 .

1616267 Certification Effective Date: April 1, 2021 Issue Date: March 30, 2021 Certificate Expiry Date: March 31, 2024 ________________________________________________________________________________ ISO 9001 Registered by: QMI-SAI Canada Limited (SAI Global), 20 Carlson Court, Suite 200, Toronto, Ontario M9W 7K6 Canada.

RTF Template P lac e and date: For the is s uing offic e: Shanghai, 30 March, 2018 DNV GL – Business A ssurance Suite A , Building 9, No.1591 Hongqiao Road, Changning District, Shanghai 200336, P.R.

© 2019, All Right Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 T R A N S P O RTAT I O N L I G H T I N G S U P P L I E R H E A T S I N K F O R H I G H P O W E R L E D • A material to replace aluminum • High thermal conductivity - 20 W/mK • Electrically conductive • Increase production rate by 50%, as three secondary operations were eliminated • Reduced the weight of each part by 30% • Collaborated with the customer to participate in the SPE Automotive Innovation Awards Therma-Tech™ TT6600-5001 EC Grey KEY REQUIREMENTS WHY AVIENT?

M E D I C A L E Q U I P M E N T M A N U FA C T U R E R S U R G I C A L X - R A Y G L A S S E S • Replace lead while providing uniform shielding performance • Radiation shielding up to 140KeV • Improve glasses design • Compliance with Radiation Protection Regulation: Adult eye exposure must be below 20 mSv per calendar year • Conducted extensive testing to ensure comparable and uniform shielding performance • Improved geometric flexibility • Lowered shielding component costs 30-50% by eliminating machining and assembly steps (associated with lead) • Reduced weight of the glasses and enabled a more ergonomic design • Eliminated disposal concerns associated with lead Trilliant™ XR Lead Replacement Thermoplastics KEY REQUIREMENTS WHY AVIENT?

Trilliant XR - CT and MRI Scanners M E D I C A L D E V I C E M A N U FAC T U R E R M R I A N D C T S C A N N E R S • Uniform shielding with no “hot spots” • X-ray shielding up to 140 KeV • Meet European Union’s Restriction of Hazardous Substances (RoHS) future compliance requirements • Provided a lead alternative solution that delivered improved geometric flexibility for more uniform radiation shielding • Lowered shielding component costs 30-50% by eliminating machining and assembly steps Trilliant™ XR Lead Replacement Thermoplastics KEY REQUIREMENTS WHY AVIENT?

Cibodas Kecamatan Cibodas, Tangerang 15138 Indonesia Scope Category I Production of customer specific Masterbatches for Food packaging materials on the dedicated extrusion lines Normative base ISO 22000:2018 Food Safety Management Systems Requirements for any organization in the food chain Reg. no. 46391 Validity 25. 02. 2021 – 24. 02. 2024 Issue 30. 06. 2021 Swiss Made sqs.ch F.

Avient Colorants Singapore Pte Ltd 8 Third Chin Bee Road Jurong Industrial Estate Singapore 618684 Singapore Scope Category I Production of customer specific Masterbatches for Food packaging materials on the dedicated extrusion lines Normative base ISO 22000:2018 Food Safety Management Systems Requirements for any organization in the food chain Reg. no. 46390 Validity 25. 02. 2021 – 24. 02. 2024 Issue 30. 06. 2021 Swiss Made sqs.ch F.

On May 30, 2013, we sold our vinyl dispersion, blending and suspension resin assets (Resin Business) to Mexichem Specialty Resins Inc. On February 28, 2013, PolyOne issued $600.0 million aggregate principal amount of senior notes, which mature on March 15, 2023. On February 28, 2013, PolyOne issued $600.0 million aggregate principal amount of senior notes, which mature on March 15, 2023.

Comp. 2006, 8, 30. [11] P. Sci. 2013, 35, 381. [30] F. Eng., C 2010, 30, 705