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(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 38.2 $ 0.41 $ 5.1 $ 0.06 Special items, after-tax 6.6 0.07 32.0 0.35 Amortization expense, after-tax 15.0 0.16 15.2 0.16 Adjusted net income / EPS $ 59.8 $ 0.65 $ 52.3 $ 0.57 (1) Per share amounts may not recalculate from figures presented herein due to rounding Three Months Ended Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations – GAAP $ 38.7 $ 5.1 Income tax expense (benefit) 11.3 (0.1) Interest expense, net 26.9 30.3 Depreciation & amortization 45.1 46.4 EBITDA from continuing operations $ 122.0 $ 81.7 Special items, before tax 9.7 43.2 Interest expense included in special items (1.3) (2.2) Depreciation & amortization included in special items (0.4) — Adjusted EBITDA $ 130.0 $ 122.7 Adjusted EBITDA as a percent of sales 15.9 % 16.3 % 1 2024 2023 Sales: Color, Additives and Inks $ 521.5 $ 486.5 Specialty Engineered Materials 294.6 267.9 Corporate (0.9) (0.7) Sales $ 815.2 $ 753.7 Operating income: Color, Additives and Inks $ 75.5 $ 64.5 Specialty Engineered Materials 36.4 30.3 Corporate (34.7) (60.5) Operating income $ 77.2 $ 34.3 Depreciation & amortization: Color, Additives and Inks $ 21.9 $ 24.6 Specialty Engineered Materials 20.7 20.5 Corporate 2.5 1.3 Depreciation & amortization $ 45.1 $ 46.4 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 97.4 $ 89.1 Specialty Engineered Materials 57.1 50.8 Corporate (32.2) (59.2) Other (expense) income, net (0.3) 1.0 EBITDA from continuing operations $ 122.0 $ 81.7 Special items, before tax 9.7 43.2 Interest expense included in special items (1.3) (2.2) Depreciation & amortization included in special items (0.4) — Adjusted EBITDA $ 130.0 $ 122.7 Adjusted EBITDA as a percent of sales: Color, Additives and Inks 18.7 % 18.3 % Specialty Engineered Materials 19.4 % 19.0 % 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 Q3 Earnings Webcast Slides w_Appendix and Non-GAAP.pdf 2024 AVNT Q3 Webcast Slides w non-GAAP.pdf Q3 Avient Webcast Slides with Non-GAAP Recs.pdf Appendix Slides for webcast.pdf IR Deck - AVNT-2024.09.30 - 10.30.24 3PM (002).pdf Attachment

given strong second quarter results; Revised guidance reflects 8% to 14% growth in adjusted EPS over the prior year This performance reflects our team's focus to capitalize on growth opportunities across the many end markets we serve, with particular success this quarter in packaging and consumer, our two largest end markets." continued, "Our demand outlook for the second half of the year remains largely unchanged from our previous outlook in May, so we are updating our full-year guidance to reflect the strong second quarter results.

Customer collaboration and feedback has been extremely positive, and cultural integration has been excellent, as evidenced by the employee engagement scores that clearly reflect reflected on 2020 saying, "It was a historic year where we brought two global leaders together to create an even stronger company – now known as Avient.  See Attachment 3 for a definition and summary of special items and Attachment 7 for a summary of pro forma adjustments associated with the Clariant MB Acquisition necessary to reflect Clariant MB adjusted results in all periods presented.

D is t. ) Avient reflects 2021 estimated revenue of $4,750M and estimated CAPEX of $80M (excludes one-time synergy capture CAPEX of $20M) Avient Specialty Other Free Cash Flow Conversion (1) 2021E (%) Being asset light helps us to generate strong free cash flow that is in line with specialty formulators. Free cash flow conversion calculated as (EBITDA – Capex) / EBITDA HIGH FREE CASH FLOW CONVERSION Avient reflects 2021 estimated EBITDA of $580M and estimated CAPEX of $80M (excludes one-time synergy capture CAPEX of $20M) 86 93 85 83 79 77 75 89 85 83 81 79 79 78 77 74 en t (10) Total Enterprise Value / 2021E EBITDA Our current valuation with updated guidance implies an EBITDA multiple that is below many of our specialty formulator peers. With the Clariant Color business acquisition and divestment of the PP&S business, our exposure is now concentrated in less-cyclical and high-growth markets, with increased geographic diversification and a more specialized portfolio that can significantly expand EBITDA margins. 33 Avient reflects 2021 estimated EBITDA of $580M OUR VALUATION VERSUS PEERS Avient Specialty Other 11.4 20.2 16.7 16.5 14.7 12.0 10.8 40.7 29.9 26.2 13.2 12.4 11.0 10.9 9.1 9.0 7.5 6.5 en t SUMMARY: WHY INVEST IN AVIENT?

This innovation drives performance and is reflective of consistent, strategic investments in our portfolio…and people. D is t. ) LB Median: 5%Median: 3% Avient reflects 2021 estimated revenue of $4,650M and excludes one-time synergy capture CAPEX ($20M) Avient Specialty Other Free Cash Flow Conversion (1) 2021E (%) Being asset light helps us to generate strong free cash flow that is in line with specialty formulators. Free cash flow conversion calculated as (EBITDA – Capex) / EBITDA Median: 81% Median: 78% HIGH FREE CASH FLOW CONVERSION Avient reflects 2021 estimated EBITDA of $580M and excludes one-time synergy capture CAPEX ($20M) 87 90 86 82 80 78 73 87 82 82 79 79 78 78 77 76 71 67 46 en t (6) Total Enterprise Value / 2021E EBITDA Our current valuation with updated guidance implies an EBITDA multiple that is below specialty formulator peers and the median of other selected chemical / specialty companies.

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Adjusted EPS is calculated as follows: Adjusted EPS 2006Y* 2007Y* 2008Y* 2009Y* 2010Y 2011Y 2012Y 2013Y 2014Y 2015Y Net income (loss) attributable to PolyOne common shareholders $ 130.9 $ 40.9 $ (417.0) $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 Joint venture equity earnings, after tax (68.5) (26.1) (20.8) (19.0) (14.7) (3.7) - - - - Special items, after tax(1) (51.2) 10.7 457.2 (75.9) (72.5) (72.8) 36.2 32.6 90.5 28.9 Adjusted net income $ 11.2 $ 25.5 $ 19.4 $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 Diluted shares 92.8 93.1 92.7 93.4 96.0 94.3 89.8 96.5 93.5 88.7 Adjusted EPS $ 0.12 $ 0.27 $ 0.21 $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 Adjusted EPS Q1 2009* Q2 2009* Q3 2009* Q4 2009* Q1 2010 Q2 2010 Q3 2010 Q4 2010 Net income attributable to PolyOne common shareholders $ 3.3 $ 1.3 $ 51.3 $ 50.8 $ 20.1 $ 44.7 $ 0.1 $ 87.6 Joint venture equity earnings, after tax (8.2) (5.8) (3.0) (2.0) (0.5) (4.5) (6.2) (3.5) Special items, after tax(1) (10.2) 9.2 (36.9) (38.0) (3.8) (22.1) 25.4 (72.0) Adjusted net (loss) income $ (15.1) $ 4.7 $ 11.4 $ 10.8 $ 15.8 $ 18.1 $ 19.3 $ 12.1 Diluted shares 92.2 93.5 93.9 94.4 95.3 96.3 96.3 97.4 Adjusted EPS $ (0.16) $ 0.05 $ 0.12 $ 0.11 $ 0.17 $ 0.19 $ 0.20 $ 0.12 Adjusted EPS Q1 2011 Q2 2011 Q3 2011 Q4 2011 Q1 2012 Q2 2012 Q3 2012 Q4 2012 Net income attributable to PolyOne common shareholders $ 106.0 $ 23.1 $ 16.0 $ 8.3 $ 15.3 $ 18.4 $ 19.4 $ 0.2 Joint venture equity earnings, after tax (3.7) - - - - - - - Special items, after tax(1) (81.3) 1.3 2.8 4.4 6.2 8.9 5.4 15.7 Adjusted net income $ 21.0 $ 24.4 $ 18.8 $ 12.7 $ 21.5 $ 27.3 $ 24.8 $ 15.9 Diluted shares 96.4 95.5 94.0 91.9 90.7 90.7 90.2 90.5 Adjusted EPS $ 0.22 $ 0.26 $ 0.20 $ 0.14 $ 0.24 $ 0.30 $ 0.28 $ 0.18 2 Adjusted EPS Q1 2013 Q2 2013 Q3 2013 Q4 2013 Q1 2014 Q2 2014 Q3 2014 Q4 2014 Net income (loss) attributable to PolyOne common shareholders $ 11.2 $ 38.6 $ 23.2 $ 21.0 $ 29.4 $ 30.9 $ 32.3 $ (14.6) Special items, after tax(1) 17.7 (2.0) 12.3 4.6 12.5 17.4 13.1 47.5 Adjusted net income $ 28.9 $ 36.6 $ 35.5 $ 25.6 $ 41.9 $ 48.3 $ 45.4 $ 32.9 Diluted shares 92.8 99.1 98.1 97.2 95.7 94.3 93.1 91.3 Adjusted EPS $ 0.31 $ 0.37 $ 0.36 $ 0.26 $ 0.44 $ 0.51 $ 0.49 $ 0.36 Adjusted EPS Q1 2015 Q2 2015 Q3 2015 Q4 2015 Net income attributable to PolyOne common shareholders $ 30.2 $ 66.8 $ 44.5 $ 3.1 Special items, after tax(1) 11.4 (15.9) 3.0 30.4 Adjusted net income $ 41.6 $ 50.9 $ 47.5 $ 33.5 Diluted shares 90.1 89.8 88.4 86.6 Adjusted EPS $ 0.46 $ 0.57 $ 0.54 $ 0.39 Adjusted operating margin is calculated as follows: Adjusted operating margin Q1 2009* Q2 2009* Q3 2009* Q4 2009* YTD 2009* Q1 2010 Q2 2010 Q3 2010 Q4 2010 YTD 2010 Operating Income $ 9.9 $ 17.1 $ 57.9 $ 52.2 $ 137.1 $ 32.3 $ 58.6 $ 42.0 $ 26.3 $ 159.2 Special items (1) (1.3) 4.6 (27.5) (24.5) (48.7) - (14.5) 5.5 4.2 (4.8) Joint venture equity earnings (12.8) (9.0) (4.8) (3.1) (29.7) (0.8) (7.1) (9.7) (5.5) (23.1) Adjusted operating (loss) income $ (4.2) $ 12.7 $ 25.6 $ 24.6 $ 58.7 $ 31.5 $ 37.0 $ 37.8 $ 25.0 $ 131.3 Sales $ 463.4 $ 496.5 $ 548.3 $ 552.5 $ 2,060.7 $ 604.0 $ 666.2 $ 650.7 $ 585.3 $ 2,506.2 Operating Margin (0.9)% 2.6% 4.7% 4.5% 2.8% 5.2% 5.6% 5.8% 4.3% 5.2% Adjusted operating margin Q1 2011 Q2 2011 Q3 2011 Q4 2011 YTD 2011 Q1 2012 Q2 2012 Q3 2012 Q4 2012 YTD 2012 Operating income (loss) $ 173.4 $ 42.4 $ 33.4 $ (46.2) $ 203.0 $ 37.4 $ 43.3 $ 43.5 $ 13.3 $ 137.5 Special items (1) (127.2) 2.7 4.9 72.9 (46.7) 8.5 11.8 8.3 25.3 53.9 Joint venture equity earnings (5.7) - - - (5.7) - - - - - Adjusted operating income $ 40.5 $ 45.1 $ 38.3 $ 26.7 $ 150.6 $ 45.9 $ 55.1 $ 51.8 $ 38.6 $ 191.4 Sales $ 682.8 $ 723.4 $ 694.0 $ 609.2 $ 2,709.4 $ 745.5 $ 756.6 $ 707.7 $ 651.0 $ 2,860.8 Operating Margin 5.9% 6.2% 5.5% 4.4% 5.6% 6.2% 7.3% 7.3% 5.9% 6.7% 3 Adjusted operating margin Q1 2013 Q2 2013 Q3 2013 Q4 2013 YTD 2013 Q1 2014 Q2 2014 Q3 2014 Q4 2014 YTD 2014 Operating income (loss) $ 40.5 $ 80.7 $ 61.6 $ 48.7 $ 231.5 $ 56.4 $ 49.4 $ 63.6 $ (14.3) $ 155.1 Special items (1) 16.6 (5.2) 10.8 7.8 30.0 22.9 39.8 22.0 80.2 164.9 Adjusted operating income $ 57.1 $ 75.5 $ 72.4 $ 56.5 $ 261.5 $ 79.3 $ 89.2 $ 85.6 $ 65.9 $ 320.0 Sales $ 801.1 $ 1,037.6 $ 1,008.9 $ 923.6 $ 3,771.2 $ 1,002.3 $ 1,005.5 $ 958.4 $ 869.3 $ 3,835.5 Operating Margin 7.1% 7.3% 7.2% 6.1% 6.9% 7.9% 8.9% 8.9% 7.6% 8.3% Adjusted operating margin Q1 2015 Q2 2015 Q3 2015 Q4 2015 YTD 2015 Operating income $ 70.1 $ 80.3 $ 69.2 $ 31.3 $ 250.9 Special items (1) 9.3 11.9 18.7 31.4 71.3 Adjusted operating income $ 79.4 $ 92.2 $ 87.9 $ 62.7 $ 322.2 Sales $ 873.1 $ 887.1 $ 841.6 $ 775.8 $ 3,377.6 Operating Margin 9.1% 10.4% 10.4% 8.1% 9.5% Adjusted gross margin is calculated as follows: (In millions) Twelve Months Ended December 31, 2015 Gross margin - GAAP $ 681.5 Special items in gross margin(1) 39.7 Gross margin before special items $ 721.2 Specialty operating income mix percentage is calculated as follows: Platform operating income mix percentage 2005* 2010* 2015 Color, Additives and Inks $ 4.3 $ 37.7 $ 135.4 Specialty Engineered Materials 0.4 49.7 79.6 Designed Structures and Solutions - - 13.8 Specialty Platform $ 4.7 $ 87.4 $ 228.8 Performance Products and Solutions 75.7 54.0 57.4 Distribution 19.5 42.0 68.0 Joint ventures 91.9 18.9 — Corporate and eliminations (51.5) (27.7) (103.3) Operating income GAAP $ 140.3 $ 174.6 $ 250.9 Less: Corporate operating expense 51.5 27.7 103.3 Operating income excluding Corporate $ 191.8 $ 202.3 $ 354.2 Specialty platform operating mix percentage 2% 43% 65% 4 Adjusted EBITDA and net debt to adjusted EBITDA is calculated as follows: (In millions) Twelve Months Ended December 31, 2015 Income from continuing operations, before income taxes $ 167.7 Interest expense, net 64.1 Depreciation and amortization 104.3 Special items, impact on income from continuing operations before income taxes(1) 87.6 Accelerated depreciation included in special items (6.2) Adjusted EBITDA $ 417.5 Short-term and current portion of long-term debt $ 18.6 Long-term debt 1,128.0 Less: Cash and cash equivalents (279.8) Net Debt 866.8 Net Debt/TTM Adjusted EBITDA 2.1 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principal, discontinued operations or the related resegmentation POL IR Presentation - February 2016 2.26.2016 ��PolyOne Investor Presentation�March 2016�� Forward-Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation 25 Consecutive Quarters of EPS Growth PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Color and Engineered Materials at the�Heart of Specialty Transformation Proof of Performance & 2020 Goals Slide Number 10 Slide Number 11 Slide Number 12 Slide Number 13 Innovation Drives Earnings Growth Investing to Drive Growth Design and Service as a Differentiator Customer First Through World-Class Service Debt Maturities & Pension Funding Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return Why Invest In PolyOne?