公 公 ：公 公 公 公 PolyOne 公 公 公 公 公 公 公 公 公 公 公 公 。 公 公 （Avient 公 公 ）公 公 公 公 公 公 公 – 公 公 公 公 公 公 – 公 公 公 （PolyOne 公 公 公 公 公 公 公 ）公 公 公 公 公 公 公 公 公 公 公 公 公 公 公 公 公 公 。

It’s in this spirit that we joined PolyOne and Clariant Masterbatch, two complementary businesses, and formed a new one that we’ve named Avient. We are better together through: • Keeping Safety First — PolyOne and Clariant are both ACC Responsible Care® companies, and nothing is more important than the health, safety and well-being of our people Better Together: PolyOne and Clariant Masterbatch We are better together.

Scope included legacy PolyOne operations.

Truly global • Technology platform and expertise – Combining the best from two global leaders creates an unmatched portfolio of products and solutions • Global and local accounts – Combining our legacies’ business, dealing with large key accounts and a broad base of regional customers, creates ample opportunities for growth and industry partnering • Talent acquisition and retention – Our ‘best of both worlds’ leadership position helps us to attract and retain the best people in the industry • Cost and performance synergies – Alignment of site structures and technical & commercial organizations is driving a positive cost position An Excellent Fit Avient Corporation 16 • Dedicated global organization • Full suite of performance products • Excellent product stewardship expertise • High quality technical organization • Strong focus on innovation and sustainability • Strong customer relationships and global industry partnerships • Global footprint What Legacy Clariant Color Brings Avient Corporation 17 Customer orientation and dedication Aesthetics + Product Functionality Innovation and Sustainability Safety First o Both ACC Responsible Care® companies o Legacy and continued focus on safety Retain All Customers and Existing Business o Minimize integration disruptions o Broadened portfolio of specialty solutions o World class products and service Retain All Key Employees o Talented, passionate, and collaborative o Supportive, high-performance culture Principles of Integration Avient Corporation 18 $85M Cost Synergies • Barrier technology • Functional additives • Processing aids • Flame retardants • Light-weighting additives Complementary Technologies • Clariant’s approved formulations and certified facilities • Legacy PolyOne’s leading share in distribution channels Healthcare Solutions • Clariant’s position in SE Asia, Latin America, Germany & Italy • Legacy PolyOne’s position in U.S., Canada and China Regional Strengths • Solutions with Avient’s engineered materials customers • Avient’s distribution channels Segment Cross-selling Revenue synergy opportunities of $75M The complementary aspects of our combined businesses are unquestionable.

Stephan, and PolyOne Corporation, “EMI/RFI Shielding Formulations for Use in Advanced Electronic Systems” (2014).

EMEA Pommerloch / Luxembourg Salce Office Regional Headquaters PolyOne S.à r.l., Avient Luxembourg S.à r.l., 19 Route de Bastogne Pommerloch, Luxembourg, L-9638

PROXY SUMMARY PROXY STATEMENT 2023 | Annual Meeting of Shareholders 3 OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. aa) “Predecessor Plans” means the PolyOne Corporation 2010 Equity and Performance Incentive Plan and the PolyOne Corporation 2017 Equity and Incentive Compensation Plan, in each case including as may be (or may have been) amended or amended and restated from time to time. The PolyOne Corporation 2020 Equity and Incentive Compensation Plan was effective as of the Effective Date.

Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 100 facilities and employing approximately 8,400 associates, Avient (formerly PolyOne) Corporation (NYSE: AVNT), is a premier provider of specialized sustainable material. Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 100 facilities and employing approximately 9,100 associates, Avient (formerly PolyOne) Corporation (NYSE: AVNT), is a premier provider of specialized sustainable material.

PROXY SUMMARY 4 PROXY STATEMENT 2022 | Annual Meeting of Shareholders OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. EY has been retained as the independent registered public accounting firm for Avient and its predecessor companies, PolyOne Corporation and The Geon Company, continuously since 1993.

Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 120 facilities and employing approximately 8,700 associates, Avient (formerly PolyOne) Corporation is a premier provider of specialized sustainable material. Headquartered in Avon Lake, Ohio, USA, with world-wide operations encompassing more than 120 facilities and employing approximately 8,700 associates, Avient (formerly PolyOne) Corporation, is a premier provider of specialized sustainable material.