TECHNICAL BULLETIN SOLUTIONS DESIGNED TO ADDRESS EVOLVING NEEDS Determining the appropriate polymer for the job can prevent product failures, thereby reducing service calls, product returns and warranty claims for manufacturers. Cidex® OPA is a trademark of ASP Global Manufacturing GMBH; CaviCide™ is a trademark of Metrex Research, LLC; and Virex® is a trademark of Diversey, Inc. $$$ $$ $ Improved Chemical Resistance PC+ABS PC PPSU PC+PET PC+PBT Trilliant ™ Material Compatibility with Various Disinfectants 8.5% Bleach 3% Peroxide Cidex® OPA CaviCide™ Virex™ Tb Trilliant™ PC+PBT PC+PET PPSU PC PC+ABS Trilliant™ PC+PBT PC+PET PPSU PC PC+ABS Trilliant™ PC+PBT PC+PET PPSU PC Trilliant™ PC+PBT PC+PET PPSU Trilliant™ $$$ $$ $ Improved Chemical Resistance PC+ABS PC PPSU PC+PET PC+PBT Trilliant ™ Material Compatibility with Various Disinfectants 8.5% Bleach 3% Peroxide Cidex® OPA CaviCide™ Virex™ Tb Trilliant™ PC+PBT PC+PET PPSU PC PC+ABS Trilliant™ PC+PBT PC+PET PPSU PC PC+ABS Trilliant™ PC+PBT PC+PET PPSU PC Trilliant™ PC+PBT PC+PET PPSU Trilliant™ www.avient.com Copyright © 2021, Avient Corporation.

Biodiversity (4.3.1.1) Position of individual or committee with responsibility Executive level ☑ Chief Executive Officer (CEO) (4.3.1.2) Environmental responsibilities of this position 75 Dependencies, impacts, risks and opportunities ☑ Assessing environmental dependencies, impacts, risks, and opportunities Policies, commitments, and targets ☑ Measuring progress towards environmental corporate targets ☑ Setting corporate environmental policies and/or commitments (4.3.1.4) Reporting line Select from: ☑ Reports to the board directly (4.3.1.5) Frequency of reporting to the board on environmental issues Select from: ☑ More frequently than quarterly (4.3.1.6) Please explain Corporate sustainability and climate-related issues are the responsibility of Avient’s highest-level officer, our President and Chief Executive Officer (CEO), who is also a member of the Board of Directors. We use distance based calculations derived from employee and office zip codes. Double window installed in general offices.

Product Selection Help Product Selection Help Sales Offices Article Exploring the Benefits of Bio-Based Alternatives Finding value when addressing an increased demand for bio-derived solutions.

Patterson, Chairman, President and Chief Executive Officer, Avient Corporation. 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. These costs are included in Corporate and eliminations.

Patterson, Chairman, President and Chief Executive Officer, Avient Corporation. For the same reasons, the Company is unable to address the probable significance of the unavailable information. These costs are included in Corporate and eliminations.

PolyOne Investor Presentation March 2017 POLYONE CORPORATION 2 Forward-Looking Statements  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 CORPORATION 3 Use of Non-GAAP Measures  This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures.  Addressable market exceeds $40 billion  Strong performance demonstrates that our strategy and execution are working  Megatrends and emerging opportunities align with strengths  Innovation and services provide differentiation, incremental pricing power and competitive advantage  Strategic balance between reinvestment for growth and returning cash to shareholders  Strong and proven management team driving growth and performance 18 POLYONE CORPORATION Segment Highlights POLYONE CORPORATION 19 2016 Revenue: $0.8 Billion At a Glance: Color, Additives & Inks Key Applications 2016 Revenue by Industry Expanding Profits 1.7% 4.6% 5.1% 5.5% 7.2% 8.1% 9.7% 12.2% 14.7% 16.7% 16.0% 20%+ 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision United States 45% Europe 33% Asia 15% Latin America 5% Canada 2% Packaging 30% Industrial 15% W & C 10% B & C 10% Textiles 9% Transportation 9% Consumer 7% Healthcare 6% Appliance 2% E & E 2% POLYONE CORPORATION 20 2016 Revenue: $0.6 Billion At a Glance: Specialty Engineered Materials 2016 Revenue by Industry Expanding Profits 1.1% 1.3% 3.4% 5.1% 9.6% 8.0% 8.6% 9.3% 12.1% 14.7% 14.3% 20%+ 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision Consumer 19% Transportation 19% E & E 15% W & C 15% Healthcare 11% Industrial 8% Packaging 7% Appliance 3% B & C 3% United States 51% Europe 27% Asia 20% Canada 2% Key Applications POLYONE CORPORATION 21 2016 Revenue: $0.4 Billion At a Glance: Designed Structures & Solutions 2016 Revenue by Industry Expanding Profits 1.4% 5.6% 7.3% 3.0% 8-10% -0.9% 2012 2013 2014 2015 2016 2020 Operating Income % of Sales Platinum Vision Transportation 27% Industrial 21% Packaging 21% B & C 11% Healthcare 8% Consumer 8% Appliance 3% E & E 1% Key Applications United States 95% Canada 5% http://www.google.com/url?

Avient Corporation. For the same reasons, Avient is unable to address the probable significance of the unavailable information. Moving up the value chain, and expanding addressable market size by providing materials solutions in select and prioritized areas Copyright © .

Composite ballistic panels provide several advantages, including: Homes 4% Government Buildings 40% Office Buildings 16% Banks 25% Other 25% Where are ballistic composite panels used?

Any translations of this document shall be used for reference only.) 2/2 Appendix to the Certificate of Approval AWARDED TO PolyOne France Tossiat Route de la vavrette, 01250, Tossiat - France IATF USI: LWZS4P REMOTE SUPPORT FUNCTION(S) NAME ADDRESS SCOPE AVIENT LUXEMBOURG 19, Route de bastogne, 9638, Pommerloch - Luxembourg IATF USI: GAZS9A Purchasing, Logistics, Supplier Management PolyOne Europe Logistics 7 Rue bleriot, 4460, Grace-Hollogne - Belgium IATF USI: P4WA4Y Warehousing Polyone Poland Ul. wschdnia 6, 99-300, Kutno - Poland IATF USI: C4W5ZL Logistics https://e-cer.bureauveritas.com/68LJQE0ZV0CO6I7YW0YSXOUMV9WWROQPHPI2AOHRRLFFVRAVTFVZGXKWIE3TOWLTTKEWCPQB9UNAPXHH6T0HXOMUEDVYPRPJLEXBBTKQYPBRICYOKY143TECQ5UMHGA3JX 2024-12-13T10:07:11+0100 Authenticity and Integrity

Ltd Business Registration Number: 91320505799067336K Registered I Operation Address: 13 Plant, No.855, Zhujiang Road, Suzhou New District, Jiangsu Province, China by reason of its Quality Management System has been awarded this certificate for compliance with the standard ISO 9001:2015 The Quality Management System Applies in the following area: Production Activities of Plastic Colorant & Additive (UV Blockers, Anti-Oxidation, Anti-Aging) Certified since: January 8, 2009 Valid from: January 16, 2024 Valid until: January 4, 2027 the expiry date of last certification cycle: January 4, 2024 the date of recertification audit: December 21, 2023 to December 22, 2023 After a surveillance cycle, the certificate is valid only when used together with an Acceptance Notice of Surveillance Audit issued by CQC.