They are based on management’s expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. The non-GAAP financial measures include: adjusted EPS, earnings before interest, tax, depreciation and amortization (EBITDA), adjusted EBITDA, net debt, Specialty platform operating income, Specialty platform gross margin percentage, adjusted operating income, return on invested capital, net debt/ EBITDA, and the exclusion of corporate charges in certain calculations. Adjusted EPS 2006Y* 2007Y* 2008Y* 2009Y 2010Y*** 2011Y*** 2012Y*** *Net Income attributable to PolyOne common shareholders $ 130.9 $ 40.9 $ (417.0) $ 106.7 $ 152.5 $ 153.4 $ 53.3 SunBelt equity earnings, after tax (68.5) (26.1) (20.8) (19.0) (14.7) (3.7) - Special items, after tax (21.2) 41.4 310.0 (31.0) 15.8 (30.5) 35.7 Tax adjustments (30.0) (30.7) 147.2 (44.9) (88.3) (42.3) 0.5 Adjusted net income $ 11.2 $ 25.5 $ 19.4 $ 11.8 $ 65.3 $ 76.9 $ 89.5 Diluted shares 92.8 93.1 92.7 93.4 96.0 94.3 89.8 Adjusted EPS $ 0.12 $ 0.27 $ 0.21 $ 0.13 $ 0.68 $ 0.82 $ 1.00 Adjusted EPS H1 2012*** H1 2013*** *Net Income attributable to PolyOne common shareholders $ 33.7 $ 49.8 Special items, after tax 14.1 15.0 Tax adjustments 1.0 0.7 Adjusted net income $ 48.8 $ 65.5 Diluted shares 90.7 95.8 Adjusted EPS $ 0.54 $ 0.68 *** Restated results to exclude the Resin business and to remove Specialty Coatings from the Performance Products and Solutions segment into Global Color, Additives and Inks segment.

Proper material identification and characterization empower customers with confidence and foster innovation. Material Data Sets • A number of material characterization data sets are available in .udb, moldex 3D, and SIMPOE format Mold Filling Simulation (see examples below) • Serves to validate part design (e.g., gate location, fill/pack/warp/cool) & material solution • Evaluates component design viability with preferred Avient material solution • Fiber analysis determines fiber orientation and length • Predicts part quality and manufacturability (shrink, warp, weld line location) FILLING PART QUALITYFIBER ORIENTATION Finite Element Analysis (FEA) • Virtually simulates how an application will perform in real-world conditions with a high level of precision • Able to represent a variety of problems, test methods, models and outputs to evaluate the design, process and material combination for validation or optimization FEA Simulation Capabilities • Static - Displacement/rotations - Stress and strains - Contact pressure - Reaction forces/moments - Factors of safety • Vibration - Eigen frequencies - Harmonic response ○ Harmonic displacement, acceleration and stress Software Used • Autodesk Moldflow • Simulia/Abaqus • MSC Cradle • CAD/CAE - MSC Apex - SolidWorks • Failure mode effect analysis (FMEA) support By leveraging mold filling simulation, data software, and physical simulation capabilities, we can help inform your decision-making process.

Proper material identification and characterization empower customers with confidence and foster innovation. Material Data Sets • A number of material characterization data sets are available in .udb, moldex 3D, xChange data cards, and SIPOE format Mold Filling Simulation (see examples below) • Serves to validate part design (e.g., gate location, fill/pack/warp/cool) & material solution • Evaluates component design viability with preferred Avient material solution • Fiber analysis determines fiber orientation and length • Predicts part quality and manufacturability (shrink, warp, weld line location) FILLING PART QUALITYFIBER ORIENTATION Finite Element Analysis (FEA) • Virtually simulates how an application will perform in real-world conditions with a high level of precision • Able to represent a variety of problems, test methods, models and outputs to evaluate the design, process and material combination for validation or optimization • Dynamic - Acceleration - Impact - Break/no break - Transmitted force - Energy absorption • Thermal Mechanical - Temperature Computational Fluid Dynamics (CFD) - Heat path - Dominant heat transfer - Temperature mapping - Coupling with mechanical simulations FEA Simulation Capabilities • Static - Displacement/rotations - Stress and strains - Contact pressure - Reaction forces/moments - Factors of safety • Vibration - Eigen frequencies - Harmonic response ○ Harmonic displacement, acceleration and stress Software Used • Autodesk Moldflow • Digimat • Simulia/Abaqus • MSC Cradle • CAD/CAE - MSC Apex - SolidWorks Failure Mode Effect Analysis (FMEA) Support By leveraging mold filling simulation, multiphysics simulation, and the understanding of the link between design, process and material, we can help inform your decision-making process for product development.

They are based on management’s expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. Adjusted EPS 2006Y* 2007Y* 2008Y* 2009Y* 2010Y 2011Y 2012Y 2013Y 2014Y Net income attributable to PolyOne common shareholders $ 130.9 $ 40.9 $ (417.0) $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 Joint venture equity earnings, after tax (68.5) (26.1) (20.8) (19.0) (14.7) (3.7) - - - Special items, after tax (21.2) 41.4 310.0 (31.0) 15.8 (30.5) 35.7 30.4 101.0 Tax adjustments (30.0) (30.7) 147.2 (44.9) (88.3) (42.3) 0.5 2.2 (10.5) Adjusted net income $ 11.2 $ 25.5 $ 19.4 $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 Diluted shares 92.8 93.1 92.7 93.4 96.0 94.3 89.8 96.5 93.5 Adjusted EPS $ 0.12 $ 0.27 $ 0.21 $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principal or discontinued operations. Appendix 2014 Financial Highlights At a Glance�Global Color, Additives and Inks At a Glance�Global Specialty Engineered Materials At a Glance�Designed Structures and Solutions At a Glance�Performance Products and Solutions At a Glance�Distribution Plastics: Key to Future Sustainable Development Commitment to Operational Excellence A Rich Pipeline of Opportunity Application Examples Slide Number 28 Authentication Technology Range Rover Evoque Interior Slide Number 31 Metal Replacement Solutions Next Generation Solar Charger High-Barrier Packaging Containers Aerospace Applications Non-GAAP Reconciliation Sidoti & Company non-GAAP Rec

SURGICAL INSTRUMENT OEM T I B I A L T R I A L S • Offered in various colors for ease of brand identification and sizing differentiation • Able to withstand repeated steam sterilization and chemical disinfection • Available in low minimum order quantities (MOQ) • Delivered a variety of bright, differentiating color choices • Maintained excellent mechanical performance after repeated steam sterilization and harsh chemical cleaning • Offered low MOQ with flexible supply Transcend™ Premier Healthcare Colorants KEY REQUIREMENTS WHY AVIENT?

Patterson continued, "Looking back at the Spartech acquisition completed in 2013, there were a number of positive, value-creating elements of the deal.  The company anticipates this will result in an after-tax charge of They are based on management's expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements.

They are based on management’s expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. The non-GAAP financial measures include: adjusted EPS, earnings before interest, tax, depreciation and amortization (EBITDA), adjusted EBITDA, net debt, Specialty platform operating income, Specialty platform gross margin percentage, adjusted operating income, return on invested capital, net debt/ EBITDA, and the exclusion of corporate charges in certain calculations. Adjusted EPS 2006Y* 2007Y* 2008Y* 2009Y 2010Y*** 2011Y*** 2012Y*** *Net Income attributable to PolyOne common shareholders $ 130.9 $ 40.9 $ (417.0) $ 106.7 $ 152.5 $ 153.4 $ 53.3 SunBelt equity earnings, after tax (68.5) (26.1) (20.8) (19.0) (14.7) (3.7) - Special items, after tax (21.2) 41.4 310.0 (31.0) 15.8 (30.5) 35.7 Tax adjustments (30.0) (30.7) 147.2 (44.9) (88.3) (42.3) 0.5 Adjusted net income $ 11.2 $ 25.5 $ 19.4 $ 11.8 $ 65.3 $ 76.9 $ 89.5 Diluted shares 92.8 93.1 92.7 93.4 96.0 94.3 89.8 Adjusted EPS $ 0.12 $ 0.27 $ 0.21 $ 0.13 $ 0.68 $ 0.82 $ 1.00 Adjusted EPS H1 2012*** H1 2013*** *Net Income attributable to PolyOne common shareholders $ 33.7 $ 49.8 Special items, after tax 14.1 15.0 Tax adjustments 1.0 0.7 Adjusted net income $ 48.8 $ 65.5 Diluted shares 90.7 95.8 Adjusted EPS $ 0.54 $ 0.68 *** Restated results to exclude the Resin business and to remove Specialty Coatings from the Performance Products and Solutions segment into Global Color, Additives and Inks segment.

They are based on management’s expectations that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. 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. Three Months Ended June 30, 2024 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 33.6 $ 0.36 $ 22.1 $ 0.24 Special items, after-tax 21.8 0.24 19.6 0.21 Amortization expense, after-tax 14.8 0.16 16.2 0.18 Adjusted net income / EPS $ 70.2 $ 0.76 $ 57.9 $ 0.63 Three Months Ended June 30, Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations – GAAP $ 33.8 $ 22.3 Income tax expense 11.2 10.4 Interest expense, net 26.6 29.4 Depreciation & amortization 44.9 47.6 EBITDA from continuing operations $ 116.5 $ 109.7 Special items, before tax 28.1 21.7 Interest expense included in special items (1.0) — Depreciation & amortization included in special items (0.3) (0.1) Adjusted EBITDA $ 143.3 $ 131.3 Adjusted EBITDA as a percent of sales 16.9 % 15.9 % 1 Three Months Ended June 30, 2024 2023 Sales: Color, Additives and Inks $ 542.0 $ 524.5 Specialty Engineered Materials 308.1 300.8 Corporate (0.4) (0.9) Sales $ 849.7 $ 824.4 Operating income: Color, Additives and Inks $ 86.1 $ 68.0 Specialty Engineered Materials 42.8 39.7 Corporate (56.4) (45.4) Operating income $ 72.5 $ 62.3 Depreciation & amortization: Color, Additives and Inks $ 21.8 $ 25.7 Specialty Engineered Materials 20.8 19.9 Corporate 2.3 2.0 Depreciation & amortization $ 44.9 $ 47.6 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 107.9 $ 93.7 Specialty Engineered Materials 63.6 59.6 Corporate (54.1) (43.4) Other expense, net (0.9) (0.2) EBITDA from continuing operations 116.5 109.7 Special items, before tax 28.1 21.7 Interest expense included in special items (1.0) — Depreciation & amortization included in special items (0.3) (0.1) Adjusted EBITDA $ 143.3 $ 131.3 Adjusted EBITDA as a percent of sales: Color, Additives and Inks 19.9 % 17.9 % Specialty Engineered Materials 20.6 % 19.8 % 2 Year Ended December 31, 2023 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 & amortization included in special items (1.9) Adjusted EBITDA $ 501.8 3 Avient Q2 2024 Webcast Slides_for website_with non-GAAP_8_5.pdf IR Deck - AVNT-2024.06.30 - 8.02.24 1130AM.pdf Attachment Avient Q2 2024 Webcast Slides_for website_with non-GAAP.pdf AVNT cover slide.pdf