Global ISO Certificate Library PolyOne Shareholders Approve All Proposals at 2015 Annual Meeting PolyOne Shareholders Approve All Proposals at 2019 Annual Meeting

NOTICE OF 2020 ANNUAL MEETING OF SHAREHOLDERS AND PROXY STATEMENT PolyOne Corporation PROPOSAL 1 — ELECTION OF BOARD OF DIRECTORS ............................................................................................................ 11 PROPOSAL 2 — ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION ............................ 16 PROPOSAL 3 — APPROVAL OF THE POLYONE CORPORATION 2020 EQUITY AND INCENTIVE COMPENSATION PLAN .........................................................................................................................................17 PROPOSAL 4 — RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ................................................................................................................................................30 MESSAGE FROM OUR CEO Your vote is very important. Wulfsohn Qualifications, Attributes, Skills and Experience: ADVISORY VOTE PROPOSAL 2 — ADVISORY VOTE TO APPROVE NAMED EXECUTIVE OFFICER COMPENSATION Objective How Our Executive Compensation Program Achieves this Objective Our Board recommends a vote FOR this Proposal to approve, on an advisory basis, our Named Executive Officer compensation. PROPOSAL 3 — APPROVAL OF THE POLYONE CORPORATION 2020 EQUITY AND INCENTIVE COMPENSATION PLAN General Why We Recommend That You Vote for this Proposaly p Our Board recommends a vote FOR this Proposal to approve the PolyOne Corporation 2020 Equity and Incentive Compensation Plan. 2020 Plan Highlights g g Administration Reasonable 2020 Plan Limits Allowances for Conversion Awards and Assumed Plans Limited Share Recycling Provisions Minimum Vesting No Repricing Without Shareholder Approval Change of Control Definition Exercise or Base Price Limitation.

Translates to 25% CO2 reduction based on 25% energy reduction in bottle blowing process CO 2 (t on ne s p er y ea r) ColorMatrix AAzure products are supplied in ColorMatrix approved packaging and are active as supplied. PROCESSING AND HANDLING ColorMatrix AAzure has food contact approvals defined in the below table. For further information regarding food contact approvals, please get in touch with your local sales representative.

color and additive masterbatch business; the ability to obtain required regulatory or other third-party approvals and consents and otherwise consummate the proposed acquisition of

Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks, including recessionary conditions; the current and potential future impact of the COVID-19 pandemic on our business, results of operations, financial position or cash flows; changes in polymer consumption growth rates and laws and regulations regarding plastics in jurisdictions where we conduct business; fluctuations in raw material prices, quality and supply, and in energy prices and supply; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; an inability to raise or sustain prices for products or services; our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; information systems failures and cyberattacks; amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; the ability to obtain required regulatory approvals and otherwise consummate the proposed sale of the Distribution business; and other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation and any recessionary conditions.

CERTIFICATE OF INCORPORATION ON CHANGE OF NAME Company Number 3141094 The Registrar of Companies for England and Wales hereby certifies that under the Companies Act 2006: POLYONE CORPORATION UK LIMITED a company incorporated as private limited by shares, havingits registered office situated in England and Wales, has changed its name to: AVIENT MATERIAL SOLUTIONS UK LIMITED Given at Companies House on9th November 2021.

We then develop and communicate the draft to internal stakeholders, soliciting feedback, and considering revisions before the standard is finalized and approved. To find more details about our certifications, visit our ISO Certifications Library. The certification allows all locations on the certification to maintain a Responsible Care® Certification and ISO:14001 certification.

Delaware The First State Page 1 5799827 8100 Authentication: 202256240 SR# 20210072080 Date: 01-11-21 You may verify this certificate online at corp.delaware.gov/authver.shtml I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF AMENDMENT OF “CLARIANT PLASTICS & COATINGS USA LLC”, CHANGING ITS NAME FROM "CLARIANT PLASTICS & COATINGS USA LLC" TO "AVIENT COLORANTS USA LLC", FILED IN THIS OFFICE ON THE ELEVENTH DAY OF JANUARY, A.D. 2021, AT 10:39 O`CLOCK A.M. AND I DO HEREBY FURTHER CERTIFY THAT THE EFFECTIVE DATE OF THE AFORESAID CERTIFICATE OF AMENDMENT IS THE FIFTEENTH DAY OF JANUARY, A.D. 2021.

We then develop and communicate the draft to internal stakeholders, soliciting feedback, and considering revisions before the standard is finalized and approved. To find more details about our certifications, visit our ISO Certifications Library. The certification allows all locations on the certification to maintain a Responsible Care® Certification and ISO:14001 certification.

We then develop and communicate the draft to internal stakeholders, soliciting feedback, and considering revisions before the standard is finalized and approved. To find more details about our certifications, visit our ISO Certifications Library. The certification allows all locations on the certification to maintain a Responsible Care® Certification and ISO:14001 certification.