TECHNICAL EXPERTISE HELPS ELECTRONIC CONNECTOR COMPANY ENTER NEW MARKET © 2021, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 To learn more about Bergamid™ Nylon Formulations, contact Avient at +1.844.4AVIENT (1.844.428.4368) or visit us at avient.com. The connector company’s product development engineers established three key criteria for the polymer needed to meet the cost and performance needs of the new connector: • Meet targeted technical requirements – The new connector must provide signal dampening within the range specified. THE SOLUTION Because they knew Avient could help, the connector company’s design engineers invited Avient into the development process.

The company delivered first quarter GAAP EPS of $0.91 compared to $0.86 in the prior year quarter. There will be a question and answer session following the company's presentation and prepared remarks. # # 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.

Investor Relations Contact: Isaac D. Media Relations Contacts Company Officers

Investor Relations Contact: Isaac D. Media Relations Contacts Company Officers

Investor Relations Contact: Isaac D. Media Relations Contacts Company Officers

The company will host a conference call at 8:30 a.m. Media Relations Contacts Company Officers

Media Contact: Kyle G. Media Relations Contacts Company Officers

Leaders at our global facilities are in contact with local community leadership such as police and fire, labor safety organizations, local affiliates of global environmental regulatory agencies, local officials and/or trade unions and works councils. Our disclosures are located at: https://www.avient.com/company/policies-and-governance/ca-transparency-act-disclosure https://www.avient.com/company/policies-and-governance/europe-modern-slavery-and-human-trafficking- statement We reinforce Our Commitment to human rights, as set forth above, throughout our organization by incorporating and reflecting these principles in organizational policies, training programs, and our governance management framework. https://www.avient.com/company/policies-and-governance/ca-transparency-act-disclosure https://www.avient.com/company/policies-and-governance/europe-modern-slavery-and-human-trafficking-statement https://www.avient.com/company/policies-and-governance/europe-modern-slavery-and-human-trafficking-statement https://www.avient.com/sites/default/files/2020-10/supplier-code-of-conduct.pdf

If you have any questions, please feel free to contact Helen Devine (614) 644-8977. Sincerely, Helen Devine Helen Devine Certified Paralegal hdevine@OhioSOS.gov Change to the Name of the Company; Articles of Incorporation WHEREAS, the Board of Directors (the “Board”) of PolyOne Corporation, an Ohio corporation (the “Company”), deems it to be advisable and in the best interest of the Company to change its corporate name; and WHEREAS, the Board deems it to be advisable and in the best interest of the Company to amend the Company’s Articles of Incorporation, as amended, to reflect the Company’s new name. NOW, THEREFORE, BE IT RESOLVED, that, effective as of the time and date that the applicable certificate is accepted for filing by the Ohio Secretary of State (the “Effective Time”), the name of the Company shall be changed from “PolyOne Corporation” to “Avient Corporation.”

who is taking a leadership opportunity with another company. Investor Relations Contact: Joe Di Salvo, Vice President, Investor Relations, PolyOne Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com; Media Contact: Kyle G. Investor Contacts