ROSE SC 3 HC-6699 DARK BROWN 1 (RECT) HMF RED UV PE 4

RUGGED 1 RUGGED 4 HD6706-17 GOLD METALLIC 3

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: $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?

Handelsregister B des Amtsgerichts Mannheim Nummer der Firma: Seite 1 von 2 HRB 731450 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 S.à r.l., Germany Branch Gaggenau Geschäftsanschrift: Adolf-Dambach-Straße 2, 76571 Gaggenau Zweigniederlassung der "PolyOne S.à r.l." mit Sitz in Pommerloch / Luxemburg (Registre de commerce et des sociétés B226205) c) Den Vertrieb und den Großhandel von Fertigerzeugnissen, die unter anderem aus ein- und mehrschichtigen thermoplastischen Platten, Polymermischungen und Farbkonzentraten sowie klaren thermogeformten Kunststoffbehältern bestehen, wobei die Tätigkeiten für die das Gesetz besondere Qualifikationen oder Erlaubnisse vorschreibt, die von der Zweigniederlassung nicht erfüllt oder gehalten werden, ausdrücklich ausgeschlossen sind. 12.000,00 EUR Jeder Geschäftsführer vertritt einzeln. Gesellschaft mit beschränkter Haftung nach luxemburgischem Recht (société à responsibilité limitée) Gesellschaftsvertrag vom 04.07.2018. 10.09.2018 Kretzler 2 b) Fielding, Gary J., Chesire / Vereinigtes Königreich, *20.09.1963 Potoczny, Zaneta Gabriela, Mersch / Luxemburg, *17.10.1974 Ausgeschieden als Machin, Geneviéve Elizabeth, Luxemburg / Luxemburg, *31.03.1972 17.03.2020 Knauf Abruf vom 27.12.2021 17:13 Handelsregister B des Amtsgerichts Mannheim Nummer der Firma: Seite 2 von 2 HRB 731450 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 3 a) Firma geändert; nun: Avient S.à r.l., Germany Branch Daten der Hauptniederlassung geändert; nun: Zweigniederlassung der "Avient S.à r.l." mit Sitz in Pommerloch / Luxemburg (Registre de commerce et des sociétés B226205) Ausgeschieden als Fielding, Gary J., Chesire / Vereinigtes Königreich, *20.09.1963 Merklein, Norbert, Kronberg im Taunus, *03.05.1964 Der geänderte Gesellschaftsvertrag der Hauptniederlassung wurde zum Handelsregister eingereicht. 23.12.2021 Georg Abruf vom 27.12.2021 17:13

Global CARE Insurance (Critical Care Air Rescue and Evacuation), which provides supplemental medical services and medical transportation related to business travel, is also provided to all Named Executive Officers. 2017 Grants of Plan-Based Awards 86,331 (1) 1,151,077 (1) 2,302,154 (1) - 142,500 (2) 1,140,000 (2) 2,280,000 (2) - 2/15/2017 39,400 118,200 (5) 1,419,188 2/15/2017 39,050 (8) 1,331,605 27,769 (1) 370,250 (1) 740,500 (1) - 29,750 (2) 238,000 (2) 476,000 (2) - 2/15/2017 8,217 24,650 (5) 295,964 2/15/2017 8,150 (8) 277,915 15,437 (1) 205,827 (1) 411,654 (1) - 14,000 (2) 112,000 (2) 224,000 (2) - 2/15/2017 3,867 11,600 (5) 139,277 2/15/2017 3,850 (8) 131,285 7/3/2017 10,000 (9) 384,100 16,849 (1) 224,654 (1) 449,308 (1) - 16,000 (2) 128,000 (2) 256,000 (2) - 2/15/2017 4,417 13,250 (5) 159,088 2/15/2017 4,400 (8) 150,040 17,420 (1) 232,269 (1) 464,538 (1) - 16,625 (2) 133,000 (2) 266,000 (2) - 2/15/2017 4,584 13,750 (5) 165,092 2/15/2017 4,550 (8) 155,155 9,329 (1) 124,385 (1) 248,770 (1) - 15,000 (2) 120,000 (2) 240,000 (2) - 15,000 (3) 120,000 (3) 240,000 (3) - 14,500 (3) 116,000 (3) 232,000 (3) - 14,500 (3) 116,000 (3) 232,000 (3) - 2/15/2017 4,150 12,450 (5) 149,483 7/18/2017 4,150 12,450 (6) 181,148 7/18/2017 4,300 12,900 (6) 163,271 7/18/2017 3,300 9,900 (6) 118,041 2/15/2017 4,150 (8) 141,515 7/18/2017 4,182 (10) 161,383 7/18/2017 4,350 (10) 167,867 7/18/2017 3,723 (10) 143,671 9,818 (1) 130,900 (1) 261,800 (1) - 18,000 (2) 144,000 (2) 288,000 (2) - 15,518 (4) 124,141 (4) 248,282 (4) - 8,921 (4) 71,366 (4) 142,732 (4) - 3,199 (4) 25,595 (4) 51,190 (4) - 2/15/2017 4,967 14,900 (5) 178,899 5/31/2017 4,967 14,900 (7) 201,051 5/31/2017 1,737 4,560 (7) 74,765 5/31/2017 3,734 11,200 (7) 131,600 5/31/2017 3,466 3,466 (7) 41,696 2/15/2017 4,950 (8) 168,795 5/31/2017 4,473 (11) 167,022 5/31/2017 2,826 (11) 105,523 5/31/2017 1,180 (11) 44,061 40.19 M.A. 4) Represents a stock-settled RSU award that was granted on July 3, 2017 and generally vests in full on the third anniversary of the grant date. Name Aggregate Balance at 12/31/2016 ($) Executive Contributions in Last FY ($)(2) Registrant Contributions in Last FY ($)(3) Aggregate Earnings in Last FY ($)(4) Aggregate Withdrawals/ Distributions ($) Aggregate Balance at Last FYE ($)(1)(5) R.M.

4) Based on 91,071,925 common shares outstanding as of March 1, 2023. Avient also makes available executive physicals to all Named Executive Officers (used by all Named Executive Officers). 2022 GRANTS OF PLAN-BASED AWARDS Grant Date Estimated Future Payouts Under Non-Equity Incentive Plan Awards Estimated Future Payouts Under Equity Incentive Plan Awards All Other Awards: Shares of or Units Exercise or Base Price of Option ($/Sh) (i) Grant Date Fair Value of Stock and Option (j) Threshold Target Maximum Threshold (f) Target (g) — 150,497(1) 1,504,973(1) 3,009,946(1) — — — — — — 215,000(2) 1,720,000(2) 3,440,000(2) — — — — — 2/14/2022 — — — 44,900(3) 134,700(3) — 52.64 2,006,642 2/14/2022 — — — — — 38,150(4) — 2,008,216 — 42,509(1) 425,086(1) 850,172(1) — — — — — — 35,625(2) 285,000(2) 570,000(2) — — — — — 2/14/2022 — — — 7,4333) 22,300(3) — 52.64 332,206 2/14/2022 — — — — — 6,350(4) — 334,264 — 31,169(1) 311,688(1) 623,376(1) — — — — — — 25,500(2) 204,000(2) 408,000(2) — — — — — 2/14/2022 — — — 5,333(3) 16,000(3) — 52.64 238,354 2/14/2022 — — — — — 4,550(4) — 239,512 — 31,641(1) 316,408(1) 632,816(1) — — — — — — 28,875(2) 231,000(2) 462,000(2) — — — — — 2/14/2022 — — — 6,017(3) 18,050(3) — 52.64 268,893 2/14/2022 — — — — — 5,150(4) — 271,096 — 34,459(1) 344,594(1) 689,188(2) — — — — — — 25,500(2) 204,000(2) 408,000(2) — — — — — 2/14/2022 — — — 5,333(3) 16,000(3) — 52.64 238,354 2/14/2022 — — — — — 4,550(4) — 239,512 Estimated Future Payouts Under Non-Equity Incentive Plan Awards (columns (c), (d) and (e)) (1) 2022 Annual Incentive Program Opportunities. Balance at 12/31/2021(1) Contributions in Last FY(2) Registrant Contributions in Last FY(3) Earnings in Last FY(4) Withdrawals/ Distributions Balance at Last FYE(1)(5) R.M.

December 4, 2023 CLEVELAND – December 4, 2023 – Avient Corporation, a premier provider of specialized and sustainable material solutions and services, proudly announces the successful completion of the Responsible Care® 14001 (RC14001®) certification process, achieving compliance globally across 48 Avient sites.

February 4, 2025 POMMERLOCH, Luxembourg – February 4, 2025 – Today, Avient Corporation, an innovator of materials solutions, announced the launch of new stain-resistant additive concentrates as the latest addition to its Cesa™ Fiber Additives portfolio.

Autopista Medellín KM 2.5 – Vía Parcelas KM 1, Vereda Sibéria COTA, Cundinamarca Colombia Activity: Manufacture, Laboratory (QC and Colormatching), Sales Activity: Administration, Site management, Manufacture, Laboratory, Maintenance, Infrastructure, Warehouse and Transport, Sales Page 4 of 10 Shed No 18–22, GIDC Estate Panchamahal Kalol, Gujarat 389330 Facility: P.T. Avient Colorants Indonesia Gatot Subroto Km. 4, Jl. Kalisabi No. 1, Kec.

İNTERNET SİTESİ İÇERİĞİ POLYONE TEKNO POLİMER MÜHENDİSLİK PLASTİKLERİ SANAYİ VE TİCARET ANONİM ŞİRKETİ Şirket Bilgileri (Yönlendirilmiş Mesaj) No İçerik Detay 1 Ticaret Unvanı Polyone Tekno Polimer Mühendislik Plastikleri Sanayi ve Ticaret Anonim Şirketi 2 MERSİS Numarası 0836003561100014 3 Merkezi Orhan Gazi Mah.1683 Sk. No.150 Şişli/İstanbul 1 WEBSITE CONTENT POLYONE TEKNO POLİMER MÜHENDİSLİK PLASTİKLERİ SANAYİ VE TİCARET ANONİM ŞİRKETİ Content to be published permanently * Please note that in case of any changes to the following content, the update shall be published on the websites on the date such changes occur. No Content Detail 1 MERSIS number of the Company 0836003561100014 2 Title of the Company Polyone Tekno Polimer Mühendislik Plastikleri Sanayi ve Ticaret Anonim Şirketi 3 Registered office of the Company Orhan Gazi Mah.1683 Sk.