Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. ASHISH KHANDPUR PRESIDENT & CEO 7 8 PORTFOLIO TRANSFORMATION 8 46% 66% 87% 100% 0% 20% 40% 60% 80% 100% 2005 2010 2015 2020 2023 % o f A dj us te d EB IT D A Commodity JVs Distribution Performance Products & Solutions Specialty Businesses Adjusted EBITDA from Specialty Applications SUSTAINABILITY AS A GROWTH DRIVER 9 LONG-TERM REVENUE GROWTH DRIVERS Sustainable Solutions Composites, Healthcare, Asia / LATAM Overlap Other 60%+ Key Growth Drivers Total Company Revenue Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Composites 8–10% Healthcare 8–10% Asia / LATAM 5% Other 0–2% Avient 6% END MARKET OBSERVATIONS (% OF COMPANY SALES) ENERGY DEFENSE TELECOMMUNICATIONS HEALTHCARE 10 TRANSPORTATION INDUSTRIAL BUILDING & CONSTRUCTION 9% CONSUMER PACKAGING 23% 11 REGIONAL OBSERVATIONS (% OF COMPANY SALES) 11 Q 4 2023 RE S U LT S Q4 2023 PERFORMANCE VS. The presentation of these measures may be different from non-GAAP financial measures used by other companies.

The company delivered second quarter GAAP EPS of $0.92 compared to $0.74 in the prior year quarter. The company noted that GAAP EPS includes special items (Attachment 3), which impacted EPS in both periods. The question and answer session will follow the company’s presentation and prepared remarks.

Ripple is responsible for developing and leading the company’s global sustainability strategy. Ripple began his current role in January 2019, leading corporate initiatives that help the company achieve critical sustainability and performance goals. Avient’s sustainability efforts have been acknowledged by third party sustainability recognitions such as Newsweek’s America’s Most Responsible Companies, Barron’s 100 Most Sustainable Companies, and USA Today’s Climate Leader awards.

Ripple is responsible for developing and leading the company’s global sustainability strategy. Ripple began his current role in January 2019, leading corporate initiatives that help the company achieve critical sustainability and performance goals. Avient’s sustainability efforts have been acknowledged by 3rd party sustainability recognitions such as Newsweek’s America’s Most Responsible Companies, Barron’s 100 Most Sustainable Companies, and USA Today’s Climate Leader awards.

Ripple is responsible for developing and leading the company’s global sustainability strategy. Ripple began his current role in January 2019, leading corporate initiatives that help the company achieve critical sustainability and performance goals. Avient’s sustainability efforts have been acknowledged by third party sustainability recognitions such as Newsweek’s America’s Most Responsible Companies, Barron’s 100 Most Sustainable Companies, and USA Today’s Climate Leader awards.

+358 (0)29 509 5000 registry@prh.fi Page: 1 (2) Business ID: 2046676-4 Date and time of creating the document: 01.12.2020 08:37:55 TRANSLATION OF THE EXTRACT FROM THE TRADE REGISTER, ELECTRONIC 01.12.2020 08:37:54 the details in the register Identifiers Name Avient Finland Oy Business ID 2046676-4 Entered in the register 31.03.2007 Company type Limited company Contact details: Postal address Äyritie 8 E 01510 Vantaa Street address Äyritie 8 E 01510 Vantaa Email tina.ahlquist@clariant.com Telephone 0106808500 Fax 0106808509 Name details Name Avient Finland Oy Auxiliary company name Drycolor Registered office Vantaa Share capital Share capital 169.000,00 € Number of shares 1 000 pcs Nominal value of a share 169,00 € Financial period Financial period 01.01 - 31.12 Financial statements The last financial statements submitted 01.01.2019 - 31.12.2019 Representation Page: 2 (2) Business ID: 2046676-4 Statutory representation: Under the law, the Board of Directors represents the company. Representation based on position: By the Chair of the Board and the Managing Director, each on their own, and by any two Board members jointly Persons role surname, first name(s) / company name date of birth / identity code citizenship Chair of the Board of Merklein, Norbert 03.05.1964 Citizen of Germany Norén, Jenny Eva Kristina 18.06.1975 Citizen of Sweden Smeds, Jan-Håkan 22.03.1961 Citizen of Finland Vetter, Alexander Helmut 04.07.1968 Citizen of Germany Managing Director Norén, Jenny Eva Kristina 18.06.1975 Citizen of Sweden Auditor PricewaterhouseCoopers Oy 0486406-8 Auditor with principal responsibility Grönroos, Maria Alice 19.02.1967 Citizen of Finland Additional information No details about beneficial owners have been registered for the company Name history Avient Finland Oy 01.12.2020 - Clariant Plastics & Coatings (Finland) Oy 04.01.2016 - 01.12.2020 Clariant Masterbatches (Finland) Oy 31.03.2007 - 04.01.2016 Source of information: Finnish Patent and Registration Office

Hanna Company. Avient is a global company. Hanna Company.

Reviewing the Company’s Supplier Code of Conduct for ongoing relevance It’s the highest honor a non-sales associate can receive at our company. The objectives included (among others): the prioritizing of environmental, health & safety performance as a core element of the Company’s culture as an ACC Responsible Care Company.

Refusals to Deal—Agreement with a competitor to boycott or not deal with a third company. 2. subject= http://avient.ethicspoint.com http://www.Avient.com/company/policies-and-governance/ethics-hotline http://www.Avient.com/company/policies-and-governance/ethics-hotline 1. × Discuss with any competitor the customers to whom the Company does not intend to sell, or the suppliers from whom the Company does not intend to buy

Purayath joined Avient in 2021to lead the development of emerging, next-generation and sustainable technologies globally for the company. At SanDisk Corporation, he held technical and engineering leadership positions over an eight-year period, building and leading a global team of engineers, whose success underpinned the growth of the company.