ASHISH KHANDPUR PRESIDENT & CEO 4 5 PORTFOLIO TRANSFORMATION 5 46% 66% 87% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2015 2020 2023 % o f A dj us te d EB IT D A Commodity JVs Distribution Performance Products & Solutions Specialty Businesses Adjusted EBITDA from Specialty Applications SUSTAINABILITY AS A GROWTH DRIVER 7 LONG-TERM REVENUE GROWTH DRIVERS Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other 60%+ Key Growth Drivers Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other 0–2% Avient 6% END MARKET OBSERVATIONS (% OF COMPANY SALES) ENERGY DEFENSE TELECOMMUNICATIONS HEALTHCARE 8 TRANSPORTATION INDUSTRIAL BUILDING & CONSTRUCTION 9% CONSUMER 19% PACKAGING 23% 9 REGIONAL OBSERVATIONS (% OF COMPANY SALES) 9 41% 36% Q 4 2 0 2 3 R E S U LT S Q4 2023 PERFORMANCE VS. PY $790 $719 $107 $114 Sales Adjusted EBITDA $0.42 $0.52 Adjusted EPS - 9% + 7% + 24% Sales Adjusted EBITDA Adjusted EPS 13 Q4 2023 SEGMENT PERFORMANCE 14 CAI $491 $459 Sales $70 $84 SEM $301 $260 Sales $55 $49 - 7% - 14%+20% - 11% Q4 EBITDA BRIDGE 15 $ millions CAI: Price / Mix 11 Deflation 14 SEM: Price / Mix 4 Deflation 9 Net Price Benefit 38 Cost Reductions 13 Wage Inflation (8) Other (2) Q4 2023 $114 Adjusted Q4 2022 $ 107 Demand (34) • Demand was down, but less than in previous quarters, due to slowing pace of destocking • Positive net price benefit: o CAI – Pricing flat with favorable mix from uptick in packaging and consumer end markets and raw material deflation o SEM - Pricing flat with favorable mix from Composites and raw material deflation • Cost reductions primarily driven by reduced administrative costs and cost synergies 2 0 2 4 G U I DA N C E 2024 GUIDANCE Full Year 2024 Guidance Adjusted EBITDA $505 to $535 million Adjusted EPS $2.40 to $2.65 Interest Expense $105 to $110 million Adjusted Effective Tax Rate 23% to 25% Capital Expenditures ~$140 million 17 Q1 Adjusted EPS of $0.68 A P P E N D I X 20 Performance Additives 15% Pigments TiO2 Dyestuffs Polyethylene 10%Nylon Polypropylene Styrenic Block Copolymer Other Raw Materials 38% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials RAW MATERIAL BASKET SEGMENT DATA U.S. & Canada 41% 36% 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS 19% 23%Industrial Building and END MARKET REVENUE $2,007M $358M $1,138M $224M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $502M$3,143M (1) 22 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2023 REVENUE | $2 .0 BILLION 34% 37% 21% END MARKET REGION 23 34% 21% 15% Building & 1% Energy COLOR, ADDITIVES & INKS 2023 REVENUE | $1 .1 BILLION 52% 35% 24 6%Industrial 12% 10% Defense Building & END MARKET REGION SPECIALTY ENGINEERED MATERIALS 32% 26% Building & 6% 2% Defense 1% (18% of sales) 2023 AVIENT REGIONAL SALES 25% Building & (36% of sales)Transportation 22% Building & 12% 6% US & Canada (41% of sales) 59% 22% Building & LATAM (5% of sales) 25 BY END MARKET Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

A CUXK0XMKM92D910207D0 estratto dal Registro Imprese in data 01/12/2021 Indice 1 Sede 2 Informazioni da statuto/atto costitutivo 3 Trasferimenti d'azienda, fusioni, scissioni, subentri 4 Attività, albi ruoli e licenze 5 Sedi secondarie ed unita' locali 6 Aggiornamento impresa 1 Sede Indirizzo Sede legale 9638 POMMERLOCH 19 ROUTE DE BASTOGNE . dell'attività prevalente Importanza: prevalente svolta dall'impresa Addetti (elaborazione da fonte INPS) Numero addetti dell'impresa rilevati nell'anno 2021 (Dati rilevati al 30/06/2021) Visura ordinaria societa' di capitale • di 5 10 I trimestre II trimestre Valore medio Dipendenti 9 9 9 Totale 9 9 9 Distribuzione dipendenti Distribuzione per Contratto Tempo Indeterminato Distribuzione per Orario di lavoro Tempo Pieno Distribuzione per Qualifica Impiegato Quadro Dirigente Addetti nel comune di GALLARATE (VA) Unità locali: 1 I trimestre II trimestre Valore medio Dipendenti 7 7 7 Totale 7 7 7 Addetti nel comune di 9638 POMMERLOCH Unità locali: 1 I trimestre II trimestre Valore medio Dipendenti 2 2 2 Totale 2 2 2 Albi e Ruoli Visura ordinaria societa' di capitale • di 6 10 Impresa Operante Con L'estero Numero: VA059868 Data: 04/06/2020 5 Sedi secondarie ed unita' locali Sede Secondaria n. MI/1 informazioni estratte dal Registro Imprese di MILANO MONZA BRIANZA LODI Ufficio Data apertura: 21/12/2018 Indirizzo MAGENTA (MI) VIA ALESSANDRINI 56 CAP 20013 estremi di iscrizione Numero Repertorio Economico Amministrativo: MI - 2550085 dell'attività Importanza: prevalente svolta dall'impresa 6 Aggiornamento impresa Data ultimo protocollo 30/11/2021 Visura ordinaria societa' di capitale • di 10 10 1 ▪ Sede 2 ▪ Informazioni da statuto/atto costitutivo 3 ▪ Trasferimenti d'azienda, fusioni, scissioni, subentri 4 ▪ Attività, albi ruoli e licenze 5 ▪ Sedi secondarie ed unita' locali 6 ▪ Aggiornamento impresa

SOURCE: https://www.gartner.com/en/newsroom/press-releases/2019-09-26-gartner-predicts- circular-economies-will-replace-line SOURCE: https://www.greenbiz.com/article/6-circular-economy-trends-will-shape-2020 What Up Next for the Circular Economy? https://www.gartner.com/en/newsroom/press-releases/2019-09-26-gartner-predicts-circular-economies-will-replace-line https://www.gartner.com/en/newsroom/press-releases/2019-09-26-gartner-predicts-circular-economies-will-replace-line https://www.greenbiz.com/article/6-circular-economy-trends-will-shape-2020 Overcoming Challenges to Achieve Circularity A global understanding is key to facilitating the growth of the circular economy and spreading its benefits across the world. Contact us today https://avient.me/3FxhNrw Button 92: Button 93: Button 3: Button 83: Button 5: Button 6: Button 66: Button 67: Button 68: Button 69: Button 70: Button 71: Button 72: Button 73: Button 74: Button 75: Button 77: Button 76: Button 78: Button 79: Button 84: Button 85: Button 86: Button 87: Button 88: Button 89: Button 90:

The Audit Committee Charter was first adopted by the Board on September 6, 2000 and amended subsequently, the last amendment being July 14, 2021. Discuss with management and the independent auditor the effect of regulatory and accounting initiatives, as well as off-balance-sheet structures on the Company’s financial statements. 6. Periodically review with the chief legal officer any legal or regulatory proceedings or matters or other contingent liabilities, including any correspondence with, or other actions by, regulators or governmental agencies, that may have a material impact on the Company’s financial statements or compliance programs, along with any material pending claims and litigation involving the Company. 6.

PolyOne Corporation Page 4 PolyOne Commodity to Specialty Transformation • Volume driven, commodity producer • Heavily tied to cyclical end markets • Performance largely dependent on non- controlling joint ventures 2000-2005 2006 - 2009 2010 – 2014 2015 and beyond • Steve Newlin appointed, Chairman, President and CEO • New leadership team appointed • Implementation of four pillar strategy • Focus on value based selling, investment in commercial resources and innovation to drive transformation • 20 consecutive quarters of double- digit adjusted EPS growth • Shift to faster growing, high margin, less cyclical end markets • Key acquisitions propel current and future growth, as well as margin expansion • Established aggressive 2015 targets • Continue specialty transformation • Goal of $2.50 adjusted EPS by 2015, three times the EPS generated in 2011 of $0.82 • Drive double digit operating income and adjusted EPS growth PolyOne Corporation Page 5 Building & Construction 13% Industrial 12% Transportation 18% Wire & Cable 9% Packaging 16% Consumer 10% HealthCare 11% Appliance Electronics & Electrical 5% 2013 Revenues: $3.8 Billion End Markets 2013 Revenues: $3.8 Billion PolyOne At A Glance United States 67% Europe 14% Canada 7% Asia Latin America Specialty 54% PP&S 18% Distribution 28% $13 $31 $46 $46 $92 $96 $122 $195 $0 $50 $100 $150 $200 2006 2007 2008 2009 2010 2011 2012 2013 Specialty Operating Income PolyOne Corporation Page 6 Old PolyOne *Operating Income excludes corporate charges and special items 2% 34% 43% 62% 65% 0% 20% 40% 60% 80% 100% 2005 2008 2010 2013 2014 YTD 2015 % o f O pe ra tin g In co m e* JV's Performance Products & Solutions Distribution Specialty 65-75% Specialty OI $5M $46M $87M $195M $191M Target Mix Shift Highlights Specialty Transformation Transformation 2015 Target PolyOne Corporation Page 7 Confirmation of Our Strategy The World’s Premier Provider of Specialized Polymer Materials, Services and Solutions Specialization Globalization Operational Excellence Commercial Excellence PolyOne Corporation Page 8 Strategy and Execution Drive Results $0.12 $0.27 $0.21 $0.13 $0.68 $0.82 $1.00 $1.31 '06 '07 '08 '09 '10 '11 '12 '13 ‘06-‘13 EPS CAGR = 41% EPS Share Price vs. S&P 500 -150% -50% 50% 150% 250% 350% 450% 550% POL S&P 500 All time high of $43.34 July 1st, 2014 PolyOne Corporation Page 9 2006 2014 YTD 2015 “Where we were” “Where we are” Target 1) Operating Income % Specialty: Global Color, Additives & Inks 1.7% 14.9% 12 – 16% Global Specialty Engineered Materials 1.1% 12.1% 12 – 16% Designed Structures & Solutions -- 7.6% 8 – 10% Performance Products & Solutions 5.5% 8.1% 9 – 12% Distribution 2.6% 6.2% 6 – 7.5% 2) Specialty Platform % of Operating Income 6.0% 65% 65 – 75% 3) ROIC* 5.0% 10.6% 15% 4) Adjusted EPS Growth N/A 37% Double Digit Expansion Proof of Performance & 2015 Goals *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period PolyOne Corporation Page 10 32% Adjusted EPS CAGR from 2011 2015 EPS: $2.50 2011 EPS: $0.82 Continued Gross Margin Expansion Mergers & Acquisitions Spartech Accretion Incremental Share Buybacks Ongoing LSS Programs (50-100 bps/yr) Accelerated Innovation & Mix Improvement Several Levers to Drive Growth Mid Single Digit Revenue Growth PolyOne Corporation Page 11 Innovation Drives Earnings Growth *Percentage of Specialty Platform revenue from products introduced in last five years $20 $53 2006 2013 Research & Development Spending ($ millions) Specialty Platform Vitality Index Progression* 14% 31% 2006 2013 Specialty Platform Gross Margin % 20% 43% 2006 2013 Specialty Vitality Index Target ≥ 35% Vitality Products + 700 to 1000 bps PolyOne Corporation Page 12 Prototype Frame Opportunity Scale-up & Test Market Build Business Case Commercial Launch Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 4 11 5 10 6 9 3 4 2 15 9 1 10 4 Breakthrough Platform Derivative A Rich Pipeline of Opportunity Number of Projects 25 14 19 17 18 93 Addressable Market ($ millions) TBD TBD $800 $450 $450 $1,700 PolyOne Corporation Page 13 Megatrends Aligned with Key End Markets Decreasing Dependence on Fossil Fuels Protecting the Environment Improving Health and Wellness Megatrend End Markets Globalizing and Localizing Health & Wellness Transportation Packaging Consumer PolyOne Corporation Page 14 60% 100% 20% 30% 40% 50% 60% 70% 80% 90% 100% 2008 2014 Pension Funding** As of September 30, 2014 Debt Maturities & Pension Funding – 9/30/14 Net Debt / EBITDA* = 1.7x $48 $317 $600 $0 $100 $200 $300 $400 $500 $600 $700 $800 2015 2020 2023 Debt Maturities As of September 30, 2014 ($ millions) Coupon Rates: 7.500% 7.375% 5.250% ** includes US-qualified pension plans only *TTM 9/30/2014 PolyOne Corporation Page 15 Free Cash Flow and Strong Balance Sheet Fund Investment / Shareholder Return Expanding our sales, marketing, and technical capabilities Targets that expand our: • Specialty offerings • End market presence • Geographic footprint • Operating Margin Synergy opportunities Adjacent material solutions Repurchased 1.5 million shares in Q3 2014 Repurchased 9.7 million shares since early 2013  10.3 million shares are available for repurchase under the current authorization Organic Growth Acquisitions Share Repurchases Dividends  Investing in operational and LSS initiatives (including synergy capture) Manufacturing alignment $0.16 $0.20 $0.24 $0.32 $0.40 $0.10 $0.20 $0.30 $0.40 $0.50 2011 2012 2013 2014 2015 Annual Dividend PolyOne Corporation Page 16 PolyOne Core Values Innovation Collaboration Excellence PolyOne Corporation Page 17 The New PolyOne: A Specialty Growth Company Why Invest In PolyOne?

PolyOne Corporation Page 4 PolyOne Commodity to Specialty Transformation • Volume driven, commodity producer • Heavily tied to cyclical end markets • Performance largely dependent on non- controlling joint ventures 2000-2005 2006 - 2009 2010 – 2014 2015 and beyond • Steve Newlin appointed, Chairman, President and CEO • New leadership team appointed • Implementation of four pillar strategy • Focus on value based selling, investment in commercial resources and innovation to drive transformation • 20 consecutive quarters of double- digit adjusted EPS growth • Shift to faster growing, high margin, less cyclical end markets • Key acquisitions propel current and future growth, as well as margin expansion • Established aggressive 2015 targets • Continue specialty transformation • Goal of $2.50 adjusted EPS by 2015, three times the EPS generated in 2011 of $0.82 • Drive double digit operating income and adjusted EPS growth PolyOne Corporation Page 5 Building & Construction 13% Industrial 12% Transportation 18% Wire & Cable 9% Packaging 16% Consumer 10% HealthCare 11% Appliance Electronics & Electrical 5% 2013 Revenues: $3.8 Billion End Markets 2013 Revenues: $3.8 Billion PolyOne At A Glance United States 67% Europe 14% Canada 7% Asia Latin America Specialty 54% PP&S 18% Distribution 28% $13 $31 $46 $46 $92 $96 $122 $195 $0 $50 $100 $150 $200 2006 2007 2008 2009 2010 2011 2012 2013 Specialty Operating Income PolyOne Corporation Page 6 Old PolyOne *Operating Income excludes corporate charges and special items 2% 34% 43% 62% 65% 0% 20% 40% 60% 80% 100% 2005 2008 2010 2013 2014 YTD 2015 % o f O p e ra ti n g I n c o m e * JV's Performance Products & Solutions Distribution Specialty 65-75% Specialty OI $5M $46M $87M $195M $191M Target Mix Shift Highlights Specialty Transformation Transformation 2015 Target PolyOne Corporation Page 7 Confirmation of Our Strategy The World’s Premier Provider of Specialized Polymer Materials, Services and Solutions Specialization Globalization Operational Excellence Commercial Excellence PolyOne Corporation Page 8 Strategy and Execution Drive Results $0.12 $0.27 $0.21 $0.13 $0.68 $0.82 $1.00 $1.31 '06 '07 '08 '09 '10 '11 '12 '13 ‘06-‘13 EPS CAGR = 41% EPS Share Price vs. S&P 500 -150% -50% 50% 150% 250% 350% 450% 550% POL S&P 500 All time high of $43.34 July 1st, 2014 PolyOne Corporation Page 9 2006 2014 YTD 2015 “Where we were” “Where we are” Target 1) Operating Income % Specialty: Global Color, Additives & Inks 1.7% 14.9% 12 – 16% Global Specialty Engineered Materials 1.1% 12.1% 12 – 16% Designed Structures & Solutions -- 7.6% 8 – 10% Performance Products & Solutions 5.5% 8.1% 9 – 12% Distribution 2.6% 6.2% 6 – 7.5% 2) Specialty Platform % of Operating Income 6.0% 65% 65 – 75% 3) ROIC* 5.0% 10.6% 15% 4) Adjusted EPS Growth N/A 37% Double Digit Expansion Proof of Performance & 2015 Goals *ROIC is defined as TTM adjusted OI divided by the sum of average debt and equity over a 5 quarter period PolyOne Corporation Page 10 32% Adjusted EPS CAGR from 2011 2015 EPS: $2.50 2011 EPS: $0.82 Continued Gross Margin Expansion Mergers & Acquisitions Spartech Accretion Incremental Share Buybacks Ongoing LSS Programs (50-100 bps/yr) Accelerated Innovation & Mix Improvement Several Levers to Drive Growth Mid Single Digit Revenue Growth PolyOne Corporation Page 11 Innovation Drives Earnings Growth *Percentage of Specialty Platform revenue from products introduced in last five years $20 $53 2006 2013 Research & Development Spending ($ millions) Specialty Platform Vitality Index Progression* 14% 31% 2006 2013 Specialty Platform Gross Margin % 20% 43% 2006 2013 Specialty Vitality Index Target ≥ 35% Vitality Products + 700 to 1000 bps PolyOne Corporation Page 12 Prototype Frame Opportunity Scale-up & Test Market Build Business Case Commercial Launch Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 4 11 5 10 6 9 3 4 2 15 9 1 10 4 Breakthrough Platform Derivative A Rich Pipeline of Opportunity Number of Projects 25 14 19 17 18 93 Addressable Market ($ millions) TBD TBD $800 $450 $450 $1,700 PolyOne Corporation Page 13 Megatrends Aligned with Key End Markets Decreasing Dependence on Fossil Fuels Protecting the Environment Improving Health and Wellness Megatrend End Markets Globalizing and Localizing Health & Wellness Transportation Packaging Consumer PolyOne Corporation Page 14 60% 100% 20% 30% 40% 50% 60% 70% 80% 90% 100% 2008 2014 Pension Funding** As of September 30, 2014 Debt Maturities & Pension Funding – 9/30/14 Net Debt / EBITDA* = 1.7x $48 $317 $600 $0 $100 $200 $300 $400 $500 $600 $700 $800 2015 2020 2023 Debt Maturities As of September 30, 2014 ($ millions) Coupon Rates: 7.500% 7.375% 5.250% ** includes US-qualified pension plans only *TTM 9/30/2014 PolyOne Corporation Page 15 Free Cash Flow and Strong Balance Sheet Fund Investment / Shareholder Return Expanding our sales, marketing, and technical capabilities Targets that expand our: • Specialty offerings • End market presence • Geographic footprint • Operating Margin Synergy opportunities Adjacent material solutions Repurchased 1.5 million shares in Q3 2014 Repurchased 9.7 million shares since early 2013  10.3 million shares are available for repurchase under the current authorization Organic Growth Acquisitions Share Repurchases Dividends  Investing in operational and LSS initiatives (including synergy capture) Manufacturing alignment $0.16 $0.20 $0.24 $0.32 $0.40 $0.10 $0.20 $0.30 $0.40 $0.50 2011 2012 2013 2014 2015 Annual Dividend PolyOne Corporation Page 16 PolyOne Core Values Innovation Collaboration Excellence PolyOne Corporation Page 17 The New PolyOne: A Specialty Growth Company Why Invest In PolyOne?

Figure 1: Tensile test data as a function of the fibre orientation 0° (orange), 45° (green), 90° (blue) https://www.hexagonmi.com Figure 4: Failure location in the flexural test for the isotropic modelling Figure 6: Failure location in the tensile test for the isotropic modelling approach (left), Digimat anisotropic modelling approach (middle) and reality (right) Figure 3: Flexural test results with the isotropic modelling approach (orange) and Digimat anisotropic modelling approach (green) Figure 5: Tensile test results with the isotropic modelling approach (orange) and Digimat anisotropic modelling approach (green) Figure 5 shows the tensile test results with, again, a convincing advantage for the Digimat anisotropic modelling approach against the isotropic modelling approach. In Figure 6, the failure locations in the tensile tests are shown for the isotropic and Digimat anisotropic modelling approaches respectively.

OS BENEFÍCIOS DO VERSAFLEXTM PF PARA PELÍCULAS PROTETORAS DE SUPERFÍCIE: • Aderência personalizável • Processo de fabricação de etapa única (coextrusão) • Baixas emissões de compostos orgânicos voláteis (COV) durante a fabricação • Elimina operações secundárias de revestimento e secagem • Elimina produtos químicos líquidos perigosos em comparação com os sistemas de solventes • Reduz custos de conversão em comparação com revestimento • Reduz o consumo de energia MERCADOS E APLICAÇÕES As formulações Versaflex PF, personalizáveis com base no nível desejado de aderência, são coextrudadas com películas protetoras para fornecer apenas a quantidade certa de proteção durante a fabricação, montagem, envio, armazenamento e instalação de produtos acabados em muitas indústrias e aplicações de uso final, incluindo: • Películas ópticas e painéis de exibição de eletrônicos para o consumo • Eletrodomésticos • Construção e materiais de construção • Móveis e armários • Automotivo e outros transportes 100/0 90/10 80/20 70/30 60/40 40/60 30/70 20/80 10/90 0/100 0,9 1,1 2,0 2,4 2,8 3,7 3,8 4,9 0 1 2 3 4 6 7 8 6,5 1,6 MD6727 MD6748 MD6700 MD6666 9512 MD6649 MD6741 0 2 4 6 8 10 12 % de MD6741/MD6700 O grau de aderência pode ser personalizado para superfícies de substrato.

BENEFITS OF VERSAFLEX PF FOR SURFACE PROTECTIVE FILMS: • Customizable tack • Single-step manufacturing process (co- extrusion) • Low volatile organic compound (VOC) emissions during manufacturing • Eliminates secondary coating and drying operations • Eliminates hazardous liquid chemicals compared to solvent systems • Reduces converting costs versus coating • Reduces energy consumption MARKETS AND APPLICATIONS Versaflex PF formulations, customizable based on desired level of tack, are co-extruded with protective films to provide just the right amount of protection during the fabrication, assembly, shipment, storage and installation of finished goods in many industries and end-use applications including: • Optical films and display panels for consumer electronics • Home appliances • Construction and building materials • Furniture and cabinetry • Automotive and other transportation 100/0 90/10 80/20 70/30 60/40 40/60 30/70 20/80 10/90 0/100 0.9 1.1 2.0 2.4 2.8 3.7 3.8 4.9 0 1 2 3 4 5 6 7 8 6.5 1.6 MD6727 MD6748 MD6700 MD6666 9512 MD6649 MD6741 0 2 4 6 8 10 12 % of MD6741/MD6700 Degree of tack can be customized for substrate surfaces.

Information Systems Use Policy Effective date: September 1, 2021 Available on the Avient Ethics & Corporate Policies Page on the Loop Confidential 2 Avient IT Department Information Systems Use Policy September 1, 2021 Table of Contents Purpose .......................................................................................................................................................... 3 Scope.............................................................................................................................................................. 3 Usage ............................................................................................................................................................. 3 Expectations for Use of Information Systems ........................................................................................... 3 Prohibited Uses of Information Systems ................................................................................................... 3 Personal Use .............................................................................................................................................. 4 Social Media .............................................................................................................................................. 4 Enforcement and Monitoring ......................................................................................................................... 4 Questions and Additional Information .......................................................................................................... 5 Document Change and Review History ........................................................................................................ 5 Appendix A: Definitions................................................................................................................................ 6 Confidential 3 Avient IT Department Information Systems Use Policy September 1, 2021 PURPOSE This Information Systems Use Policy (“Policy”) establishes acceptable and prohibited uses of Avient’s Information Systems to protect Avient and its employees and affiliates from both intentionally and unintentionally harmful actions by Users. http://polynet/ethics/Portals/23/documents/Cyber%20and%20Data%20Incident%20Response%20Policy/Cyber_Incident_Response_Policy-September%202018_EN%20-%20v1.pdf http://polynet/ethics/Portals/23/documents/Cyber%20and%20Data%20Incident%20Response%20Policy/Cyber_Incident_Response_Policy-September%202018_EN%20-%20v1.pdf Confidential 6 Avient IT Department Information Systems Use Policy September 1, 2021 APPENDIX A: DEFINITIONS In addition to those terms defined within the body of this Policy, the following definitions are used: “Avient Data” – includes (a) all data and information generated, stored, collected, or processed by Avient through Information Systems; (b) all information under the control of Avient and originating from, belonging to, or received from customers, suppliers, or third parties; (c) all data and information regarding intellectual property of Avient; and (d) purely intra-Avient information connected to individual employees, such as Information System usernames, passwords, and company ID.