KEVLAR® PARA-ARAMID DATA KEVLAR® PARA-ARAMID (HM) BARE FIBER PERFORMANCE * Equilibrium moisture regain @ 55% RH ** Creep @ 40%-58% ultimate tensile strength *** Shrinkage in dry air @ 177 C for 30 minutes ABOUT FIBER-LINE® LOCATIONS Headquarters, R&D, Manufacturing FIBER-LINE® LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 fiber@fiber-line.com Manufacturing Operations FIBER-LINE® LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 fiber@fiber-line.com EMEA & Asia Pacific Operations FIBER-LINE® INTERNATIONAL B.V.

Standard handling time frame: 1 Business Day to confirm receipt and r .ecord it in our system 15 Business days to analyze problem, provide root cause and action plan. 30 days to close complaint 8 The overall processing times may vary depending on the complexity of the issue and resources needed. Record Retention  Production records are stored for a minimum of 1 year.  ERP records are kept for a minimum of 5 years. https://www.avient.com/company/policies-and-governance/it-systems-use-policy 9 10 Annex 1 - ISO 13485 certification for Mevopur manufacturing sites North America & EMEA.

Page 3 Strategy and Execution Drive Results 90% $22 $24 PolyOne Stock Price 50% $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 PolyOne 14% Latin America 3% Distribution 2012 Revenues: $4.2 Billion* 2012 Revenues: $4.2 Billion* United States 14% 5% PP&S 20%Specialty 57% Building & HealthCare 1.02 1.20 $1.20 $1.40 ha re End Markets* EPS Growth Construction 14% 17% Industrial 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 & 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 Specialty U it d 2012 Revenues: $2.4 Billion* Solutions United States 59% 9% Latin America Building & C t ti HealthCare   o f S al es 12-16% End Markets* Expanding Profits Construction Electrical & Industrial 15% 1.5% 3.2% 4.3% 5.3% 8.4% 9.1% O pe ra tin g  In co m e  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 Designed Structures and Solutions United States 2012 Revenues: $0.85 Billion* Solutions 84% Latin America 4% Building & Construction Sign & Advertising 3% Recreation & Leisure Pool & Spa 1% Distribution & Thermoform 2% Operating Income % of Sales 2012 Revenue by Industry Segment* Expanding Profits** Electrical & Electronics 23%Industrial 3% 2.2% 8 ‐ 10% 1% HealthCare 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: $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?

AVNT-2023.09.30-News Release 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Third Quarter 2023 Results • GAAP EPS of $0.06 includes special items primarily related to environmental costs and amortization expense GAAP EPS includes $0.35 of special items (see Attachment 3) and $0.16 of intangible amortization expense (see Attachment 1). You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 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.

GAAP EPS includes $0.21 of special items (see Attachment 3) and $0.18 of intangible amortization expense (see Attachment 1). You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 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. Rose Vice President, Marketing and Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 7 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Sales $ 824.4 $ 891.0 $ 1,670.1 $ 1,783.2 Operating Income 62.3 100.1 119.4 202.3 Net income from continuing operations attributable to Avient shareholders 22.1 62.8 42.9 127.2 Basic earnings per share from continuing operations attributable to Avient shareholders $ 0.24 $ 0.69 $ 0.47 $ 1.39 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.24 $ 0.68 $ 0.47 $ 1.38 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.

The company noted that first quarter 2024 GAAP EPS includes $0.06 of special items (see Attachment 3) and $0.16 of intangible amortization expense (see Attachment 1). You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 5 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. Rose Vice President, Marketing and Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 6 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended March 31, 2024 2023 Sales $ 829.0 $ 845.7 Operating income 94.0 57.1 Net income from continuing operations attributable to Avient shareholders 49.4 20.8 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.54 $ 0.23 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.

The company noted that second quarter 2024 GAAP EPS includes $0.24 of special items (see Attachment 3) and $0.16 of intangible amortization expense (see Attachment 1). We also generated 4% and 1% organic sales growth in EMEA and Asia, respectively. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 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.

UU. y los fundamentos de muchas leyes internacionales. 1. Posibles áreas de preocupación 1. Póngase en contacto con el Departamento Jurídico de Avient en cuanto tenga la primera oportunidad y documente el incidente. 10 Norteamérica Sede mundial de Avon Lake, Estados Unidos 33587 Walker Road Avon Lake, OH, Estados Unidos 44012 Llamada gratuita: +1 866 765 9663 Teléfono: +1 440 930 1000 Fax: +1 440 930 3064 Asia Pacífico Sede regional de Shanghái, China 2F, Bloque C 200 Jinsu Road Pudong, 201206 Shanghái, China Teléfono: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 Sudamérica Sede regional en São Paulo, Brasil Av.

У каждого из них свой собственный подход, а вместе они являются основой антимонопольного законодательства США и фундаментом для множества глобальных законов. 1. Потенциальные проблемные области в сфере антимонопольного законодательства 1. Эйвон-Лейк, США 33587 Walker Road Avon Lake, OH, United States 44012 Бесплатный тел.: +1-866-765-9663 Телефон: +1-440-930-1000 Факс: +1-440 930 3064 Азиатско-Тихоокеанский регион Региональный офис в Шанхае, Китай 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghai, China Телефон: +86 (0) 21 6028 4888 Факс: +86 (0) 21 6028 4999 Южная Америка Региональный офис в Сан-Паулу, Бразилия Av.

Každý z nich přistupuje k tématu jinak a všechny tvoří základní kameny antimonopolních zákonů USA a podklady pro mnoho globálních zákonů. 1. Horká linka pro etiku https://www.Avient.com/company/policies-and- governance/ethics-hotline telefonu 1-877-228-5410 6 mailto:ethics.officer%40avient.com? subject= http://avient.ethicspoint.com http://www.Avient.com/company/policies-and-governance/ethics-hotline http://www.Avient.com/company/policies-and-governance/ethics-hotline 1.