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At the other end of the scale, soft gels and soft foam rubbers are measured using the Shore 00 scale.

At the other end of the scale, soft gels and soft foam rubbers are measured using the Shore 00 scale.

A-1 MESSAGE FROM OUR CEO March 29, 2018 Dear Fellow Shareholder: You are cordially invited to attend the PolyOne Corporation Annual Meeting of Shareholders (the “Annual Meeting”), which will be held at 9:00 a.m. on Thursday, May 17, 2018, at PolyOne Corporation’s corporate headquarters located at PolyOne Center, 33587 Walker Road, Avon Lake, Ohio 44012. NOTICE OF 2018 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 17, 2018 9:00 a.m. Please carefully review the proxy materials for the Annual Meeting, which will be held on Thursday, May 17, 2018 at 9:00 a.m.

Fearon President and Chief Executive Officer Non-Executive Chairman of the Board Please refer to the accompanying materials for voting instructions. i Notice of 2025 Annual Meeting of Shareholders Wednesday, May 14, 2025 9:00 a.m. Please carefully review the proxy materials for the Annual Meeting, which will be held virtually via live webcast on Wednesday, May 14, 2025 at 9:00 a.m. The Annual Meeting webcast will begin promptly at 9:00 a.m.

SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about PolyOne, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.polyone.com or free of charge from: Investor Affairs Relations PolyOne Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1000 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 14, 2020 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.

A-1 i MESSAGE FROM OUR CEO April 1, 2016 Dear Fellow Shareholder: You are cordially invited to attend the PolyOne Corporation Annual Meeting of Shareholders (the “Annual Meeting”), which will be held at 9:00 a.m. on Thursday, May 12, 2016, at PolyOne Corporation’s corporate headquarters located at PolyOne Center, 33587 Walker Road, Avon Lake, Ohio 44012. Patterson President and Chief Executive Officer PolyOne Corporation Please refer to the accompanying materials for voting instructions. ii NOTICE OF 2016 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 12, 2016 9:00 a.m. For information on the terms and conditions of these incentive plans, see the “What We Pay and Why: Elements of Compensation” section of this proxy statement (beginning on Page 32). 5 PROXY STATEMENT POLYONE CORPORATION PolyOne Center 33587 Walker Road Avon Lake, Ohio 44012 PROXY STATEMENT Dated April 1, 2016 Our Board respectfully requests your proxy for use at the Annual Meeting to be held at PolyOne’s corporate headquarters located at PolyOne Center, 33587 Walker Road, Avon Lake, Ohio 44012 at 9:00 a.m. on Thursday, May 12, 2016, and at any adjournments of that meeting.

Patterson Chairman, President and Chief Executive Officer Avient Corporation Please refer to the accompanying materials for voting instructions. ii NOTICE OF 2022 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 12, 2022 9:00 a.m. Please carefully review the proxy materials for the Annual Meeting, which will be held virtually via live webcast on Thursday, May 12, 2022 at 9:00 a.m. The Annual Meeting webcast will begin promptly at 9:00 a.m.

Fearon President and Chief Executive Officer Non-Executive Chairman of the Board Please refer to the accompanying materials for voting instructions. i NOTICE OF 2024 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 16, 2024 9:00 a.m. Please carefully review the proxy materials for the Annual Meeting, which will be held virtually via live webcast on Thursday, May 16, 2024 at 9:00 a.m. The Annual Meeting webcast will begin promptly at 9:00 a.m.

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