Representing over 25 major suppliers, we offer our customers a broad product portfolio, just-in-time delivery from multiple stocking locations and local technical support. Competition is based on service, performance, product innovation, product recognition, speed, delivery, quality and price. Speed, service, reputation, product line, brand recognition, delivery, quality and price, are the principal factors affecting competition.

Auto-Injector Housing - Medical Delivery Device A custom, impact-modified Trilliant™ HC formulation plus technical services met key needs and accelerated commercialization for a drug delivery device Closed System Drug Transfer Device

Lin also currently serves as a director for two other public companies, and one privately-held precision engineered drug delivery company, which provides her with additional experience she utilizes while serving as a valued member of our Board. HOUSEHOLDING OF PROXY MATERIALS The Securities and Exchange Commission has adopted rules that permit companies and intermediaries, such as brokers, to satisfy delivery requirements for proxy statements with respect to two or more shareholders sharing the same address and the same last name by delivering a single proxy statement addressed to those shareholders. Any such written notice directed to Avient should be addressed to Equiniti Trust Company, 1110 Centre Pointe Curve, Suite 101, Mendota Heights, MN 55120 or oral notice may be given by calling +1-855-598-2615: • to receive a separate copy of the Annual Report on Form 10-K for the fiscal year ended December 31, 2023, Proxy Statement or Notice of Internet Availability of Proxy Materials for the Annual Meeting; • to receive separate copies of those materials for future meetings; or • if the shareholder shares an address and wishes to request delivery of a single copy of proxy materials, rather than receiving multiple copies.

Our breadth of operations also minimizes environmental and transportation impacts through local and regional production of our materials and ultimate delivery to customers. In 2022, our associates completed over 142,000 hours of training through a variety of delivery methods. Example benefit opportunities in the United States include: • Paid vacation, sick time & holidays • Comprehensive medical, prescription drug, dental & vision plans • Health Savings Account (HSA) • 401(k) savings plan & attractive company match • Company-paid short-term & long-term disability, basic life and accidental death and dismemberment insurance • Employee Assistance Program • Voluntary benefits, such as accident, critical illness, hospital indemnity and legal insurances In general, part-time employees in the United States who work 20 hours of more are included in paid time-off programs.

Our breadth of operations also optimizes environmental and transportation impacts through local and regional production of our materials and ultimate delivery to customers. In 2023, our associates completed over 197,500 hours of training through a variety of delivery methods. Example benefit opportunities in the United States include: • Paid vacation, sick time & holidays • Comprehensive medical, prescription drug, dental & vision plans • Health Savings Account (HSA) • 401(k) savings plan & attractive company match • Company-paid short-term & long-term disability, basic life and accidental death and dismemberment insurance • Employee Assistance Program • Voluntary benefits, such as accident, critical illness, hospital indemnity and legal insurances • Inclusive fertility, adoption and surrogacy benefits • Virtual physical therapy In general, part-time employees in the United States who work 20 hours or more are included in paid time-off programs.

Our breadth of operations also optimizes environmental and transportation impacts through local and regional production of our materials and ultimate delivery to customers. In 2023, our associates completed over 197,500 hours of training through a variety of delivery methods. Example benefit opportunities in the United States include: • Paid vacation, sick time & holidays • Comprehensive medical, prescription drug, dental & vision plans • Health Savings Account (HSA) • 401(k) savings plan & attractive company match • Company-paid short-term & long-term disability, basic life and accidental death and dismemberment insurance • Employee Assistance Program • Voluntary benefits, such as accident, critical illness, hospital indemnity and legal insurances • Inclusive fertility, adoption and surrogacy benefits • Virtual physical therapy In general, part-time employees in the United States who work 20 hours or more are included in paid time-off programs.

Lin also currently serves as a director for two other public companies, and one privately-held precision engineered drug delivery company, which provides her with additional experience she utilizes while serving as a valued member of our Board. Householding of Proxy Materials The Securities and Exchange Commission has adopted rules that permit companies and intermediaries, such as brokers, to satisfy delivery requirements for proxy statements with respect to two or more shareholders sharing the same address and the same last name by delivering a single proxy statement addressed to those shareholders. Any such written notice directed to Avient should be addressed to Equiniti Trust Company, LLC, 1110 Centre Pointe Curve, Suite 101, Mendota Heights, MN 55120 or oral notice may be given by calling +1-855-598-2615: • to receive a separate copy of the Annual Report on Form 10-K for the fiscal year ended December 31, 2024, proxy statement or Notice of Internet Availability of Proxy Materials for the Annual Meeting; • to receive separate copies of those materials for future meetings; or • if the shareholder shares an address and wishes to request delivery of a single copy of proxy materials, rather than receiving multiple copies.

Ultimately, it’s about delivery – on time, efficient, and to the exact quality specifications that our customers demand.

Ultimately, it’s about delivery – on time, efficient, and to the exact quality specifications that our customers demand.

Representing over 20 major suppliers, we offer our customers a broad product portfolio, just-in-time delivery from multiple stocking locations and local technical support. Competition is based on service, performance, product innovation, product recognition, speed, delivery, quality and price. Speed, service, reputation, product line, brand recognition, delivery, quality and price are the principal factors affecting competition.