WHO WE ARE – VISION, STRATEGY, CULTURE 3 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. This innovation drives performance and is reflective of consistent, strategic investments in technology and people Clariant Color business acquired July 1, 2020 1 1 2 3 5 7 7 7 9 10 30 40 14 25 13 22 35 9 19 13 18 41 Current Additional share needed to reach 2025 target BRAND OWNERS COMMITTED TO INCREASING USE OF RECYCLED MATERIALS 14 Brand Owner 1 Brand Owner 3 Brand Owner 2 Brand Owner 7 Brand Owner 4 Brand Owner 10 Brand Owner 6 Brand Owner 11 Brand Owner 5 Brand Owner 8 Brand Owner 9 Brand Owner 12 Brand Owner 13 Percent recycled plastic used: (examples and not exhaustive) (1) (1) Latest year reported. Whether an additional line at an existing manufacturing plant, or a new facility in a growing region, we ramp-up quickly and cost-efficiently. 31 Capex / Revenue 2021E (%) AVIENT IS ASSET LIGHT Avient Specialty Formulators Other Chemical/Specialty Companies 2 3 1 2 3 3 3 4 3 3 4 5 5 5 6 9 A vi e nt A vi e nt ( E xc l.

Approved Plant/Local : Reference Document Document #: DOC-10815 Revision: 3 Document Owners: Dean Clark Effective Date: Oct 29, 2020 Title: NEU Quality Commitment Page 1 of 4 Only the electronic version of this document in ETQ is the controlled version of the document. Approved Plant/Local : Reference Document Document #: DOC-10815 Revision: 3 Document Owners: Dean Clark Effective Date: Oct 29, 2020 Title: NEU Quality Commitment Page 3 of 4 Only the electronic version of this document in ETQ is the controlled version of the document. Approved Plant/Local : Reference Document Document #: DOC-10815 Revision: 3 Document Owners: Dean Clark Effective Date: Oct 29, 2020 Title: NEU Quality Commitment Page 4 of 4 Only the electronic version of this document in ETQ is the controlled version of the document.

Page 3 Strategy and Execution Drive Results 90% $22 $24 PolyOne Stock Price 50% 70% $18 $20 $22 S&P 500 (relative performance) 30% $12 $14 $16 S&P 500 (relative performance) ‐10% 10% $6 $8 $10 50% ‐30% $0 $2 $4 $ | ‐50%$0 2006 2007 2008 2009 2010 2011 2012 2013 Page 4 Four Pillar Strategy The World’s Premier Provider of SpecializedThe World s Premier Provider of Specialized Polymer Materials, Services & Solutions Page 5 Spartech – Compelling Strategic Rationale • Spartech expands PolyOne’s specialty portfolio with adjacent technologies in attractive end markets  Bolt on acquisition with opportunity for global expansion as only Bolt‐on acquisition with opportunity for global expansion, as only 6% of Spartech’s revenues are outside of North America • PolyOne has a proven management team with a track record of transformational success • Preliminary synergy estimated at $65 million run rate by end of 3year 3  Significant opportunity to expand profitability by leveraging PolyOne’s four pillar strategy • Substantial potential share price appreciation for all shareholders f f ll / $ Accretive to EPS in first full year post‐acquisition / $0.50 once synergies realized Page 6 Mix Shift Highlights Specialty Transformation Old PolyOne Transformation 100% 2015 Target 80% In co m e* 65 – 75%40% 60% f O pe ra tin g 34% 43% 45% 65 75% 20% % o f 2%0% 2005 2008 2010 2012 2015 Specialty OI $5M $46M $87M $114M Target *Operating Income excludes corporate charges and special items JV's PP&S Distribution Specialty Page 7 Proof of Performance 2007 2012 2015 “Where we were” “Where we are” “Where we Where we were Where we are expect to be" 1) Operating Income % Specialty 3.2% 9.1% 12 – 16% PP&S 6.1% 9.0% 9 – 12% Distribution 3.0% 6.4% 6 – 7.5% 2) Specialty Platform sss% of Operating Income 20% 45% 65 – 75% 3) ROIC* ( ft t ) 7% 11% 15%3) ROIC* (after‐tax) 7% 11% 15% 4) Adjusted EPS Growth** N/A 4 yr CAGR = 55% Double Digit Expansion *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period **4 yr EPS CAGR calculated using 2012 adjusted EPS vs 2008 adjusted EPS Page 8 Proof of Performance Spartech Opportunity Intermediate PolyOne Spartech Opportunity 2006 2012 Today Goal “Where we were” “Where we are” “Where Spartech is”* “Where we can go”were are Spartech is can go Specialty Operating Margin 1.5% 9.1% 2.2% 8.0% – 10.0% Margin Page 9 *Pro Forma results include Spartech corporate allocations for FY12 ended November 3, 2012 At a Glance PolyOne Europe 14% Canada 8% Asia 5% Latin America 3% Distribution 2012 Revenues: $4.2 Billion* 2012 Revenues: $4.2 Billion* United States 70% 14% 5% PP&S 20%Specialty 57% 23% 70% Appliance 5% Building & HealthCare Transportation 16% Textiles 2% 1.02 1.20 $1.20 $1.40 ha re End Markets* EPS Growth g Construction 14% Wire & Cable 8% Consumer 8% Packaging 17% Industrial 11% Misc. 6% 9% 0.27 0 21 0.79 $0.40 $0.60 $0.80 $1.00 Ad ju st ed E ar ni ng s P er S Electrical & Electronics 4% 0.12 0.21 0.13 $0.00 $0.20 2006 2007 2008 2009 2010 2011 2012 Page 10 * Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms At a Glance Specialty U it d 2012 Revenues: $2.4 Billion* Solutions United States 59% Europe 23% Asia Canada 4% Asia 9% Latin America 5% Appliance 4% Building & C t ti HealthCare 5% Transportation 16% Textiles 2% % o f S al es 12-16% End Markets* Expanding Profits Construction 11% Wire & Cable 7% Electrical & Electronics Packaging 23% Industrial 7% Misc. 15% 1.5% 3.2% 4.3% 5.3% 8.4% 9.1% O pe ra tin g In co m e % 8.0% Electronics 4% Consumer 6% Page 11 2006 2007 2008 2009 2010 2011 2012 2015 O Target* Pro Forma includes FY2012 results for Spartech (11/03/12 YE) and Glasforms At a Glance Designed Structures and Solutions United States 2012 Revenues: $0.85 Billion* Solutions 84% Europe 2% Canada 7% Latin America 7% Appliance 4% Building & Construction 11% Wire & Cable Sign & Advertising 3% Recreation & Leisure 2% Pool & Spa 1% Distribution & Thermoform 8% Textiles 2% Operating Income % of Sales 2012 Revenue by Industry Segment* Expanding Profits** Wire & Cable 7% Electrical & Electronics 4% Consumer 6% Packaging 23%Industrial 7% Transportation 16% 3% 2.2% 8 ‐ 10% 7% Misc. 1% HealthCare 5% 2012 2015 Target Page 12 *Pro Forma includes FY2012 results for Spartech (11/03/12 YE) **Pro Forma results include Spartech corporate allocations for FY12 Positioned for Earnings Growth 2015 Target Rev: $5B Adj. EPS: $2.50 Assumptions • High single digit organic revenue CAGR • Operating margins in mid range of 2015 targets • No global recession• No global recession • No investment in incremental PP&S capacity • Completion of 2‐3 midsize accretive acquisitions • No divestitures • Housing starts at 85% of 50 year norm by 2015 R i f t bl b l 3X N t 2012 $ • Remain comfortably below 3X Net Debt / EBITDA Page 13 Rev: $3.0B Adj. EPS: $1.20 Proforma Debt Maturities & Liquidity Summary – 12/31/12 (Reflecting Financing & Spartech Acquisition) • Total Debt at 12/31/12 h $1,010 $297 $360 $300 $400 Debt Maturities As of December 31, 2012 ($ millions) Less: Cash Net Debt 213 $797 $50 $297 $100 $200 • Available Liquidity Cash $213 $800 Debt Maturities As of December 31, 2012 P f f 2/13 Fi i $50 $0 2015 2017 2020 Interest Rates: 7.500% 5.000% 7.375% Cash ABL Availability Total Liquidity $213 271 $484 $600 $400 $600 Proforma for 2/13 Financing ($ millions) Total Liquidity • Net Debt / EBITDA = 2.0x* $484 $50 $360 $0 $200 • Net Debt / EBITDA = 2.35x** $50$0 2015 2020 2023 Page 14 Interest Rates: 7.500% 7.375% 5.250% *Assumes $65 million of synergies related to Spartech acquistion **Assumes no synergies related to Spartech acquistion Use of Cash Share DividendsOrganic G Acquisitions • Repurchased 1 2 Repurchase • Introduced a Dividends • Expanding our Growth T t th t d Acquisitions • Repurchased 1.2 million shares in 2012 • 20.0 million shares are il bl f • Introduced a quarterly dividend in Q1 2011 and increased in Q1 2012 (25%) and Q1 2013 (20%) • Expanding our sales, marketing, and technical capabilities is top priority • Investing in • Targets that expand our: • Specialty offering • End market presence • Geographic footprint available for repurchase under the current authorization Q1 2013 (20%) • Objective of maintaining and growing Investing in operational and LSS initiatives (including synergy capture) • CAPEX • Synergy opportunities • Adjacent material solutions Proforma Cash Balance = $213M N t D bt / EBITDA* 2 0X CAPEX Net Debt / EBITDA* = 2.0X *Adjusted EBITDA assumes synergies related to the Spartech acquisition are realized at close; preliminary synergies estimated at $65M and are expected to be achieved over a 3-year period Page 15 Why Invest In PolyOne?

Montrose, Colorado 3. Cergy, France 3. Compensation 3.

El Conservador de Bienes Raíces que suscribe certifica que el documento adjunto, correspondiente a Modificación de "AVIENT CHILE SpA", fue inscrito con fecha 3 de junio de 2021 a fojas 43159 número 19977 del Registro de Comercio de Santiago correspondiente al año 2021. Asimismo, certifica que la solicitud de inscripción del señalado documento fue presentada a este Conservador con fecha 3 de junio de 2021, ingresándose bajo el número correlativo del Registro de Comercio 54561. Santiago, 3 Junio 2021 C ód ig o de V er ifi ca ci ón : 0 12 -2 10 6- 03 09 -1 14 2 012-2106-0309-1142 Documento incorpora Firma Electronica Avanzada Código de Verificación: cec_1c0abd-0 pagina 2 de 2 EDUARDO JAVIER DIEZ MORELLO 2021-06-03T10:28:54-0600 Santiago Firma Electrónica Notario 2021-06-04T10:37:47-0400

Handelsregister B des Amtsgerichts Mannheim Nummer der Firma: Seite 1 von 2 HRB 722072 Nummer der Eintragung a) Firma b) Sitz, Niederlassung, inländische Geschäftsanschrift, empfangsberechtigte Person, Zweigniederlassungen c) Gegenstand des Unternehmens Grund- oder Stammkapital a) Allgemeine Vertretungsregelung b) Vorstand, Leitungsorgan, geschäftsführende Direktoren, persönlich haftende Gesellschafter, Geschäftsführer, Vertretungsberechtigte und besondere Vertretungsbefugnis Prokura a) Rechtsform, Beginn, Satzung oder Gesellschaftsvertrag b) Sonstige Rechtsverhältnisse a) Tag der Eintragung b) Bemerkungen 1 2 3 4 5 6 7 1 a) PolyOne Deutschland GmbH b) Sitz verlegt; nun: Gaggenau Änderung der Geschäftsanschrift: Adolf-Dambach-Straße 2-4, 76571 Gaggenau c) Der Erwerb von Beteiligungen an Gesellschaften jeglicher Art, die Verwaltung von Beteiligungen und eigenem Vermögen sowie die Beratung über den Beteiligungserwerb mit Ausnahme rechtlicher und steuerlicher Beratung. 26.100,00 EUR a) Ist nur ein Geschäftsführer bestellt, vertritt er allein. Der Sitz ist von Bendorf (Amtsgericht Koblenz HRB 7522) nach Gaggenau verlegt. a) 30.04.2015 Rinke 2 b) Bestellt als Geschäftsführer: Palm, Christoph, Weiswampach / Luxemburg, *16.05.1963 einzelvertretungsberechtigt mit der Befugnis, im Namen der Gesellschaft mit sich im eigenen Namen oder als Vertreter eines Dritten Rechtsgeschäfte abzuschließen. a) 18.11.2016 Adam 3 b) Vertretungsbefugnis geändert bei Geschäftsführer: Kronimus, Holger, Hilgert, *26.01.1968 einzelvertretungsberechtigt mit der Befugnis, im Namen der Gesellschaft mit sich im eigenen Namen oder als Vertreter eines Dritten Rechtsgeschäfte abzuschließen. a) 13.02.2017 Essert 4 a) a) a) Abruf vom 08.11.2021 19:42 Handelsregister B des Amtsgerichts Mannheim Nummer der Firma: Seite 2 von 2 HRB 722072 Nummer der Eintragung a) Firma b) Sitz, Niederlassung, inländische Geschäftsanschrift, empfangsberechtigte Person, Zweigniederlassungen c) Gegenstand des Unternehmens Grund- oder Stammkapital a) Allgemeine Vertretungsregelung b) Vorstand, Leitungsorgan, geschäftsführende Direktoren, persönlich haftende Gesellschafter, Geschäftsführer, Vertretungsberechtigte und besondere Vertretungsbefugnis Prokura a) Rechtsform, Beginn, Satzung oder Gesellschaftsvertrag b) Sonstige Rechtsverhältnisse a) Tag der Eintragung b) Bemerkungen 1 2 3 4 5 6 7 Firma geändert; nun: Avient Deutschland GmbH Die Gesellschafterversammlung vom 21.10.2021 hat die Änderung des Gesellschaftsvertrages in § 1 (Firma, Sitz) beschlossen. 08.11.2021 Martin Abruf vom 08.11.2021 19:42

Density Impact Flexural Modulus (Dry) Tensile Strength (Dry) HDT Equilibrium Moisture — PKE-GF PA12-GF PA612-GF 5 4 3 2 1 0 Impact Shrink Flexural Modulus (Dry) Chemical Resistance Flexural Modulus (Cond.) CO2 Emission Factor — PKE-GF — PA6-GF — PA66-GF HDT Wear Density 5 4 3 2 1 0 Equilibrium Moisture 1: Poor 3: Good 5: Excellent

USE OF NON-GAAP MEASURES PolyOne Corporation 3 • This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. Holds multiple optical fibers 3. Binder • PET, Polyester, Kevlar yarns coated with Swellcoat (absorbs and blocks water) 2 3 4 5 7 6 8 9.

The company noted that GAAP EPS includes special items (Attachment 3). See Attachment 3 for a definition and summary of special items. See Attachment 3 for a definition and summary of special items.

TPE-1A peel adhesion 0 1 2 3 4 Pe el s tr en gt h: N /m m 190C 205C 220C 235C D040W6 Lexan 141 Cycolac NA1000 3 .1 2 .8 2 .8 2 .6 2 .1 2 .4 2 .4 2 .4 1.9 2 .1 2 .1 1.9 7 Figure 5. TPE-1B peel adhesion 0 1 2 3 4 5 Pe el s tr en gt h: N /m m 190C 205C 220C 235C D040W6 Lexan 141 Cycolac NA1000 4 .3 4 .1 4 .0 3 .8 2 .9 3 .3 3 .1 2 .8 2 .8 2 .9 2 .8 2 .4 Figure 6. TPE-1B peel adhesion 0 1 2 3 4 5 Pe el s tr en gt h: N /m m 25mm/sec 38mm/sec 51mm/sec 64mm/sec D040W6 Lexan 141 Cycolac NA1000 2 .92 .92 .92 .93 .1 3 .8 4 .04 .0 3 .8 2 .82 .82 .8 8 Figure 8.