AVIENT CORPORATION THIS PAGE INTENTIONALLY LEFT BLANK THIS PAGE INTENTIONALLY LEFT BLANK THIS PAGE INTENTIONALLY LEFT BLANK STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT 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 Avient, 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.avient.com or free of charge from: Investor Relations Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1000 ANNUAL MEETING The annual meeting of shareholders of Avient will be held virtually on May 11, 2023 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: Wells Fargo Shareowner Services 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 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 Administrator PolyOne Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1522 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 12, 2016 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.

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: Wells Fargo Shareowner Services 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 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 Administrator PolyOne Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1522 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 14, 2015 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.

Box 43078 Providence, Rhode Island 02940-3078 Phone: 877-498-8861 www.computershare.com Additional information about PolyOne, including current and historic copies of 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 Administrator PolyOne Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1522 ANNUAL MEETING The annual meeting of shareholders of PolyOne Corporation will be held May 9, 2012 at 9:00 a.m. at the LACENTRE Conference and Banquet Facility, Champagne C Ballroom, 25777 Detroit Road, Westlake, Ohio.

AVIENT CORPORATION THIS PAGE INTENTIONALLY LEFT BLANK THIS PAGE INTENTIONALLY LEFT BLANK STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT 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 Avient, 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.avient.com or free of charge from: Investor Relations Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1000 ANNUAL MEETING The annual meeting of shareholders of Avient will be held virtually on May 12, 2022 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: Wells Fargo Shareowner Services 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 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 Administrator PolyOne Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1522 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 15, 2014 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.