Commenting on the Company's 2021 outlook, Investor Relations Contact: Giuseppe (Joe) Di Salvo, Vice President, Treasurer and Investor Relations, Avient Corporation, +1 440-930-1921, giuseppe.disalvo@avient.com, or Media Contact: Kyle G. Investor Contacts

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The vision that guides our collective efforts is consistent and unwavering: To be the company of choice for all. This Employee Resource Group works to create a safe and accepting environment that enables LGBTQ associates to perform to their fullest potential and contribute to the success of our company. Through a combination of seminar participation and peer company benchmarking, our team quickly began offering educational programming and awareness—for both LGBTQ associates and supporters.

In addition to providing resources for associates to improve their skills and further their career with Avient, the learning opportunities enhance collaboration across the company as associates build their networks. Our Avient Academy core offerings include trainings to increase business acumen, enhance presentation skills, cultivate relationships across the company, support the transition from individual contributor to manager, and prepare top talent to become visionary leaders at the company.

As a result of side-by-side R&D and laboratory work, the two companies ultimately optimized a proprietary method for bonding the polymer disc and titanium plates. CONTACT INFORMATION Polymer Diagnostics Inc. 33587 Walker Road Avon Lake, Ohio 44012 United States +1 800 438 2335 +1 440 930 1644 fax Polymer Diagnostics Inc. is a contract laboratory with accreditation to ISO/IEC 17025 by the American Association for Laboratory Accreditation (A2LA) for both chemical and mechanical capacities.

COMPANY CONTACT INFORMATION corporateregulatory@avient.com ENVIRONMENTAL EFFECTS The substance is a natural mineral.

COMPANY CONTACT INFORMATION corporateregulatory@avient.com ENVIRONMENTAL EFFECTS Based on its physical/ chemical properties (insolubility, no vapor pressure), Carbon Black released into the environment will be distributed mainly in soil or sediments.

Pet tech companies are creating ‘wellbeing ecosystems’ which allow pet owners oversight of everything from their pet’s activity levels and the quality of their sleep, to when they get fed, how much they eat, and when they enter and leave the house. © 2022, Avient Corporation www.avient.com https://www.avient.com/contact-us-now

For the same reasons, the Company is unable to address the probable significance of the unavailable information. The question and answer session will follow the company’s presentation and prepared remarks. # # 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.

The company noted that GAAP EPS includes special items (Attachment 3). The question and answer session will follow the company’s presentation and prepared remarks. To access Avient’s news library online, please visit www.avient.com/news # # # 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.