Rose, Vice President, Corporate Communications, Avient Corporation, +1 440-930-3162, kyle.rose@avient.com

High-speed signals are imperative in today’s culture through automobile communication, cell phone service, sending information at airports, and many other wireless needs.

This webcast replaces the previously communicated earnings webcast date that was originally scheduled to be held on Wednesday, April 27. Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com NEWS RELEASE

ENVIRONMENTAL POLICY Avient Corporation conducts its operations in an environmentally responsible manner that is protective of the communities in which we operate.

July 2024 POSITION ON WATER STEWARDSHIP Avient Corporation conducts its operations in an environmentally responsible manner that is protective of the communities in which we operate.

ENVIRONMENTAL POLICY Avient Corporation conducts its operations in an environmentally responsible manner that is protective of the communities in which we operate.

SILICONE PRODUCT MANUFACTURER M E N S T R U A L C U P S • Biocompatible silicone pigment dispersion that meets healthcare industry material requirements • Custom-colored silicone paste colorant dispersion for liquid silicone rubber (LSR) • Offered a USP Class VI certified, biocompatible silicone colorant dispersion with necessary regulatory support to meet the stringent demands of healthcare product manufacturing • Provided color customization options through personalized communication and high-level technical support Stan-Tone HC Plus Silicone Dispersions for Healthcare KEY REQUIREMENTS WHY AVIENT?

PolyOne has created the quality survey response below in an effort to communicate proactively with current and potential customers about our commitment to quality and maintaining a sound and diverse quality management system. Yes B2 If you answered “Yes” to Question (B1), does this process cover internal and external communications during a crisis event? Yes F Support F1 Please provide primary and alternate contact information for communication during an emergency. 1st Director, IT 2nd Manager, Desktop Computing G Other G1 Do you have firewall protection Yes.

Do not communicate with competitors on any aspects of a bid. Do not speculate about a competitor’s future actions so as to create the misimpression that you are communicating with the competitor. Remember that notes written in the margin of a document and other informal written communications can be misconstrued and, therefore, even more damaging than formal documents. c.

Notwithstanding different or additional terms or conditions contained in Buyer’s purchase orders, invoices, or other communications to PolyOne or any customer, any addition to or alteration of the PolyOne Terms & Conditions shall be effective only if expressly made in a writing signed by an officer of PolyOne. 4.