Company: AVNT
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001122976-25-000019
Chunk: 3

Company: AVIENT CORP
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 3
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 enables full and equal participation of all shareholders regardless of location, and reduces the cost and environmental impact of the Annual Meeting. You will be able to attend and participate in the Annual Meeting online, vote your shares electronically and submit your questions during the Annual Meeting by visiting www.virtualshareholdermeeting.com/AVNT2025 .

We use the internet as our primary means of furnishing proxy materials to our shareholders, including the notice, proxy statement, and proxy card. The notice and proxy statement contain important information about proxy voting and the business to be conducted at the Annual Meeting, including the nominees for election to our Board of Directors.

Whether or not you plan to attend the Annual Meeting, please vote as promptly as possible to make sure your vote is counted. Every shareholder vote is important, and we want to ensure your shares are represented. Instructions on how to vote are found in the section entitled "Advance Voting Methods" in the Proxy Summary.

We appreciate the strong support of our shareholders over the years and hope that you will be able to attend and participate in this year’s Annual Meeting.

Sincerely,

#### Ashish K. Khandpur Richard H. Fearon
<div align='center'>President and Chief Executive Officer Non-Executive Chairman of the Board

Please refer to the accompanying materials for voting instructions.

i</div>

Notice of 2025 Annual Meeting of Shareholders

#### Wednesday, May 14, 2025

#### 9:00 a.m. Eastern Time
We are pleased to invite you to join our Board of Directors (the "Board"), senior leadership, and other employees of Avient Corporation (“Avient” or the “Company”) for the 2025 Annual Meeting of Shareholders (the "Annual Meeting"), to be held online at www.virtualshareholdermeeting.com/AVNT2025 .

Record Date

The Board set March 18, 2025 as the record date for the Annual Meeting and owners of record of common shares of Avient as of the close of business on that date are eligible to:

• Receive this notice of the Annual Meeting; and

• Vote at the Annual Meeting and any adjournments or postponements of the Annual Meeting.

Voting Matters and Vote Recommendations

| Proposals For Your Vote                                                                                                                                  |     | Board Recommendation  |
| 1.Election of twelve director nominees to our Board of Directors                                                                                         |     | Vote FOR Each Nominee |
| 2.Approval, on an advisory basis, of Named Executive Officer compensation                                                                                |     | Vote FOR