Voting electronically online during the Annual Meeting will replace any previous votes. Examples include: • Dyneema®, the world's strongest fiber™, enables unmatched levels of performance and protection for end-use applications, including ballistic personal protection, marine and sustainable infrastructure and outdoor sports; • Unique technologies that improve the recyclability of products and enable recycled content to be incorporated, thus advancing a more circular economy; PROXY SUMMARY 6 PROXY STATEMENT 2024 | Annual Meeting of Shareholders • Light-weighting solutions that replace heavier traditional materials like metal, glass and wood, which can improve fuel efficiency in all modes of transportation and reduce carbon footprint; • Sustainable infrastructure solutions that increase energy efficiency, renewable energy, natural resources conservation and fiber optic / 5G network accessibility.

Initiative category & Initiative type Energy efficiency in buildings Avient CDP Climate Change Questionnaire 2022 Friday, July 29, 2022 42 Lighting Estimated annual CO2e savings (metric tonnes CO2e) 330.9 Scope(s) or Scope 3 category(ies) where emissions savings occur Scope 2 (location-based) Scope 2 (market-based) Voluntary/Mandatory Voluntary Annual monetary savings (unit currency – as specified in C0.4) 318,550 Investment required (unit currency – as specified in C0.4) 717,464 Payback period 1-3 years Estimated lifetime of the initiative 6-10 years Comment Initiative category & Initiative type Energy efficiency in buildings Insulation Estimated annual CO2e savings (metric tonnes CO2e) 0.11 Scope(s) or Scope 3 category(ies) where emissions savings occur Scope 1 Voluntary/Mandatory Voluntary Annual monetary savings (unit currency – as specified in C0.4) 2,250 Investment required (unit currency – as specified in C0.4) 11,610 Payback period 4-10 years Estimated lifetime of the initiative Avient CDP Climate Change Questionnaire 2022 Friday, July 29, 2022 43 11-15 years Comment Initiative category & Initiative type Energy efficiency in buildings Heating, Ventilation and Air Conditioning (HVAC) Estimated annual CO2e savings (metric tonnes CO2e) 9.33 Scope(s) or Scope 3 category(ies) where emissions savings occur Scope 1 Voluntary/Mandatory Voluntary Annual monetary savings (unit currency – as specified in C0.4) 76,653 Investment required (unit currency – as specified in C0.4) 203,000 Payback period 1-3 years Estimated lifetime of the initiative 11-15 years Comment Initiative category & Initiative type Energy efficiency in buildings Motors and drives Estimated annual CO2e savings (metric tonnes CO2e) 5.06 Scope(s) or Scope 3 category(ies) where emissions savings occur Scope 2 (location-based) Scope 2 (market-based) Voluntary/Mandatory Voluntary Annual monetary savings (unit currency – as specified in C0.4) Avient CDP Climate Change Questionnaire 2022 Friday, July 29, 2022 44 2,280 Investment required (unit currency – as specified in C0.4) 541 Payback period

Voting electronically online during the Annual Meeting will replace any previous votes.

As a result, the Named Executive Officers can expect a retirement income that replaces a portion of their income while employed, similar to that received by all other employees participating in the Qualified Savings Plan who are not impacted by the Internal Revenue Code limitations.

Powell will replace Sandra Beach Lin as a member of the Environmental, Health and Safety Committee (when she moves to the Nominating and Governance Committee) following the 2018 Annual Meeting.