The webcast can be viewed live at avient.com/investors, or by clicking on the webcast link here. Conference call participants in the question and answer session should pre-register using the link at avient.com/investors, or here, to receive the dial-in numbers and personal PIN. https://www.avient.com/investors/ https://edge.media-server.com/mmc/p/nh3eiqvs/ https://www.avient.com/investors/ https://register.vevent.com/register/BI3efc1a22a8f740be852b7303538a7763 https://www.avient.com/investors/events-presentations 3 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures.

The webcast can be viewed live at avient.com/investors, or by clicking on the webcast link here. Conference call participants in the question and answer session should pre-register using the link at avient.com/investors, or here, to receive the dial-in number and personal PIN. https://www.avient.com/investors https://edge.media-server.com/mmc/p/tay7mbuw/ https://www.avient.com/investors https://register-conf.media-server.com/register/BI648915d05d0c44c4bdef681472840ace https://www.avient.com/investors/events-presentations 3 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures.

PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation Credit Suisse 26th Annual Chemical and Ag Science Conference September 17th, 2013 • In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Net debt $ 638.8 Adjusted EBITDA Q3 2012 Q4 2012 Q1 2013 Q2 2013 Total PolyOne Income before income taxes $ 30.6 $ (1.1) $ 15.7 $ 62.9 $ 108.1 PolyOne Interest expense, net 12.4 13.7 15.6 16.6 58.3 PolyOne Depreciation and amortization 17.0 15.5 19.0 25.8 77.3 PolyOne Special items in EBITDA 8.3 26.5 27.7 (5.2) 57.3 PolyOne Adjusted EBITDA 68.3 54.6 78.0 100.1 301.0 Pro forma Spartech EBITDA 16.8 14.7 11.2 - 42.7 Pro forma EBITDA $ 85.1 $ 69.3 $ 89.2 $ 100.1 $ 343.7 PolyOne Investor Presentation�Credit Suisse 26th Annual Chemical and Ag Science Conference��September 17th, 2013� Forward – Looking Statements Use of Non-GAAP Measures Strategy and Execution Drive Results Four Pillar Strategy PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Proof of Performance & 2015 Goals Innovation Drives Earnings Growth We are Experts in Polymer Science and Formulation Positioned for Strong Growth First Half 2013 Financial Highlights Debt Maturities & Liquidity Summary – 6/30/13 Use of Cash Why Invest In PolyOne? Credit Suisse September 2013 Investor Presentation non-GAAP v2.pdf Reconciliation to Condensed Consolidated Balance Sheets

Upcoming Investor Day “Planning is underway for our investor day in New York City on December 9. A recording of the webcast and the slide presentation will be available at avient.com/investors. For the same reasons, the Company is unable to address the probable significance of the unavailable information. 6 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

The webcast can be viewed live at avient.com/investors, or by clicking on the webcast link here. Conference call participants in the question and answer session should pre-register using the link at avient.com/investors, or here, to receive the dial-in number and personal PIN. https://www.avient.com/investors/ https://edge.media-server.com/mmc/p/ky9b3iov https://www.avient.com/investors/ https://register.vevent.com/register/BIa7fc29ba31db4eec88eca2de2a3faa90 https://www.avient.com/investors/events-presentations https://www.avient.com/news-events 4 About Avient Avient Corporation (NYSE: AVNT) provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

The webcast can be viewed live at avient.com/investors, or by clicking on the webcast link here. Conference call participants in the question and answer session should pre-register using the link at avient.com/investors, or here, to receive the dial-in numbers and personal PIN. https://www.avient.com/investors https://edge.media-server.com/mmc/p/izyekkyu https://www.avient.com/investors https://register.vevent.com/register/BI3c8fe685f32648e0abfb1ac2c77a59d9 https://www.avient.com/investors/events-presentations 3 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures.

PolyOne Corporation Investor Day 2012 PolyOne Investor Presentation 5th Annual Wells Fargo Industrial and Construction Conference May 8, 2014 • In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. ���PolyOne Investor Presentation�5th Annual Wells Fargo�Industrial and Construction Conference �May 8, 2014 �� Forward – Looking Statements Use of Non-GAAP Measures PolyOne Commodity to Specialty Transformation Confirmation of Our Strategy Strategy and Execution Drive Results PolyOne�At A Glance Mix Shift Highlights Specialty Transformation Proof of Performance & 2015 Goals Bridge to $2.50 Adjusted EPS by 2015 Innovation Drives Earnings Growth Unique and Innovative Solutions Debt Maturities & Pension Funding – 3/31/14 Free Cash Flow and Strong Balance Sheet �Fund Investment / Shareholder Return Why Invest In PolyOne?

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Investor Day P O L Y O N E I N V E S T O R P R E S E N T A T I O N M A R C H 2 0 1 8 F O R W A R D L O O K I N G S T A T E M E N T S PolyOne Corporation 2 In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Senior management believes these measures are useful to investors because they allow for comparison to PolyOne's performance in prior periods without the effect of items that, by their nature, tend to obscure PolyOne's operating results due to the potential variability across periods based on timing, frequency and magnitude. Segment highlights COLOR, ADDITIVES & INKS Color, Additives & Inks Specialty Engineered Materials Specialty Engineered Materials Performance Products & Solutions Performance Products & Solutions DISTRIBUTION Target end markets & �application examples Slide Number 26 Slide Number 27 Slide Number 28 Slide Number 29 Slide Number 30 Slide Number 31 Slide Number 32 Slide Number 33 Slide Number 34 Slide Number 35 Slide Number 36 Slide Number 37 Investor Presentation - March 2018 r4.pdf Investor Presentation - March 2018

On December 4, 2024, we presented our strategy at the New York Stock Exchange during our Investor Day. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. Senior Vice President, Chief Technology Officer Giuseppe DiSalvo Vice President, Treasurer and Investor Relations Kristen A .