Refer to Attachment 7 Reconciliation of Non-GAAP Financial Measures for details regarding adjustments to previously reported results to arrive to the pro forma financial metrics. # # 7 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G. See Attachment 3 for a definition and summary of special items and Attachment 7 for a summary of pro forma adjustments associated with the APM Acquisition.

Garratt's contributions to the Company, and in exchange for a release of claims from Mr. Garratt — 2,289 (1) 183,137 (1) 366,274 (1) — — — — — — 19,750 (2) 158,000 (2) 316,000 (2) — — — — — 2/22/2024 — — — 6,867 (2) 20,600 (2) — 39.27 254,580 7/22/2024 — — — (4) (4) — 39.27 271,822 7/22/2024 — — — (4) (4) 42.93 73,607 7/22/2024 — — — (4) (4) — 52.64 12,035 2/22/2024 — — — — — 6,400 (6) — 251,328 7/22/2024 — — — — — (7) — 253,779 7/22/2024 — — — — — (7) — 137,257 7/22/2024 — — — — — (7) — 41,150 Estimated Future Payouts Under Non-Equity Incentive Plan Awards (columns (c), (d) and (e)) (1) 2024 Annual Incentive Program Opportunities. 7) Modification of RSUs in Connection with Retirement.

BEREA, Ohio – PolyOne ColorMatrix, a global leader in liquid color and additives for plastics,has launched the PlanetPak™ liquid delivery system, the latest in its line of eco-friendly packaging solutions, helping customers reach their environmental goals.

We can help you stay up to date with the latest market trends and provide the material, color, and design support to meet your consumer’s needs and turn those everyday products into essentials. 

Customers rely on PolyOne for the latest in material technology and technical expertise,” said James Mattey, marketing director, Performance Products & Solutions at PolyOne.

LEADING CONSUMER PRODUCTS OEM W A T E R P I T C H E R H A N D L E • Access to the latest colors & effects for inspiration and assistance with brand aesthetics • Meet sustainability expectations while maintaining product and brand integrity • Accelerate product development timeline to meet aggressive commercial deadlines • Offered blue marble effect in Oceanworks PS • Developed a proprietary blue marble aesthetic in a recycled PS, meeting brand and sustainability expectations • Expedited product development to satisfy ambitious timeline requirements • Provided ongoing inspiration and global support throughout the process OnColor™ (Remafin™) Polymer Colorants for polyolefins KEY REQUIREMENTS WHY AVIENT?

AVNT-2023.09.30-News Release 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Third Quarter 2023 Results • GAAP EPS of $0.06 includes special items primarily related to environmental costs and amortization expense https://www.avient.com/ 5 Forward-looking Statements In this press release, statements that are not reported financial results or other historical information are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Rose Vice President, Marketing and Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 7 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2023 2022 2023 2022 Sales $ 753.7 $ 823.3 $ 2,423.8 $ 2,606.5 Operating Income 34.3 40.6 153.7 242.9 Net income (loss) from continuing operations attributable to Avient shareholders 5.1 (27.4) 48.0 99.8 Basic earnings per share from continuing operations attributable to Avient shareholders $ 0.06 $ (0.30) $ 0.53 $ 1.09 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.06 $ (0.30) $ 0.52 $ 1.08 Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

For and on behalf of BSI: Chief Operating Officer Assurance - Americas Certification Date: 2018-05-10 Latest Issue: 2018-05-10 Expiry Date: 2021-05-09 BSI Certificate Number: 691920 IATF Number: 0303891 Page: 1 of 2 This certificate remains the property of BSI and shall be returned immediately upon request. Technologies, Purchasing, Sales, Contract review, Internal audit management, Product design Location Registered Activities BSI Certificate Number: 691920 IATF Number: 0303891 Certification Date: 2018-05-10 Latest Issue: 2018-05-10 Expiry Date: 2021-05-09 Page: 2 of 2 This certificate remains the property of BSI and shall be returned immediately upon request.

NYSE: POL) a premier provider of specialized polymer materials, services and solutions, intends to release its first quarter 2016 earnings before the market opens on To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/polyone-to-hold-first-quarter-2016-conference-call-300249512.html

NYSE: POL) a premier provider of specialized polymer materials, services and solutions, intends to release its first quarter 2017 earnings before the market opens on To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/polyone-to-hold-first-quarter-2017-conference-call-300436291.html