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These grades can replace traditional TPEs in personal care, lawn and garden, outdoor high performance, footwear, office supplies, houseware durables, and automotive applications. Media contact Michelle Maniscalco Senior Manager, Marketing Communications Avient Corporation michelle.maniscalco@avient.com Company Officers

Richardson Executive Vice President & Chief Financial Officer Donald Wiseman Senior Vice President, President of Joel Rathbun Mergers & Acquisitions John Midea Global Operations & Process Improvement Scott Horn Senior Vice President, President of PolyOne Distribution Kurt Schuering Vice President Global Key Account Management Michael A. Garratt Senior Vice President & Chief Commercial Officer João José San Martin Neto Senior Vice President and Chief Human Resources Officer Cathy Dodd Vice President Marketing Mark Crist Senior Vice President, President of Color, Additives & Inks Lisa Kunkle Senior Vice President, General Counsel & Secretary Chris Murphy Vice President, Research & Development, Chief Innovation Officer T H E L E A D E R S B E H I N D T H E T E A M PolyOne Corporation 6 Robert M. PolyOne Corporation 91 S P E E D T O M A R K E T From concept to production 99.9% Reduction in turnaround time Traditional Timeline up to 24 weeks PolyOne ColorMatrix Select™ 6 hours PolyOne Corporation 92 “Being able to create color and produce parts in 1 day is unheard of in this industry.

Avient Corporation provides specialized and sustainable materials solutions that transform customer challenges into opportunities, bringing new products to life for a better world. Media Contacts Crandall Turner Avient Corporation Crandall.Turner@Avient.com Company Officers

Avient corporation first quarter 2024 results and 2024 financial guidance AVIENT CORPORATION F I R S T Q U A R T E R 2 0 2 4 R E S U L T S A N D 2 0 2 4 F I N A N C I A L G U I D A N C E (NYSE: AVNT) M AY 7 , 2 0 2 4 DISCLAIMER Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. For the same reasons, Avient is unable to address the probable significance of the unavailable information. 2 O P E N I N G RE MARK S 4 REGIONAL DEMAND TRENDS-TOTAL COMPANY Q 1 S A L E S V S P Y ( E X C L U D I N G F X ) 4 +2% -6% Flat +2% Avient ex. A reconciliation of these measures to their most directly comparable GAAP measures is provided in the tables below. 2024 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 49.4 $ 0.54 $ 20.8 $ 0.23 Special items, after-tax 5.5 0.06 22.3 0.24 Amortization expense, after-tax 14.9 0.16 15.1 0.16 Adjusted net income / EPS $ 69.8 $ 0.76 $ 58.2 $ 0.63 Three Months Ended Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations – GAAP $ 49.7 $ 21.3 Income tax expense 16.8 7.7 Interest expense, net 26.6 28.8 Depreciation and amortization 44.3 50.5 EBITDA from continuing operations 137.4 108.3 Special items, before tax 6.2 27.3 Depreciation and amortization included in special items (0.5) (1.8) Adjusted EBITDA $ 143.1 $ 133.8 Adjusted EBITDA as a percent of sales 17.3 % 15.8 % 1 2024 2023 Sales: Color, Additives and Inks $ 515.3 $ 537.0 Specialty Engineered Materials 314.4 309.7 Corporate (0.7) (1.0) Sales $ 829.0 $ 845.7 Operating income: Color, Additives and Inks $ 74.8 $ 65.6 Specialty Engineered Materials 53.4 43.1 Corporate (34.2) (51.6) Operating income $ 94.0 $ 57.1 Depreciation & amortization: Color, Additives and Inks $ 21.9 $ 25.8 Specialty Engineered Materials 19.6 21.2 Corporate 2.8 3.5 Depreciation & amortization $ 44.3 $ 50.5 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 96.7 $ 91.4 Specialty Engineered Materials 73.0 64.3 Corporate (31.4) (48.1) Other (expense) income, net (0.9) 0.7 EBITDA from continuing operations 137.4 108.3 Special items, before tax 6.2 27.3 Depreciation and amortization included in special items (0.5) (1.8) Adjusted EBITDA $ 143.1 $ 133.8 Adjusted EBITDA as a percent of sales: Color, Additives and Inks 18.8 % 17.0 % Specialty Engineered Materials 23.2 % 20.8 % 2 Year Ended December 31, 2023 Sales: Color, Additives and Inks $ 2,007.4 Specialty Engineered Materials 1,138.2 Corporate (2.8) Sales $ 3,142.8 Operating income: Color, Additives and Inks $ 259.9 Specialty Engineered Materials 142.5 Corporate (205.6) Operating income $ 196.8 Depreciation & amortization: Color, Additives and Inks $ 98.3 Specialty Engineered Materials 81.5 Corporate 9.0 Depreciation & amortization $ 188.8 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 358.2 Specialty Engineered Materials 224.0 Corporate (196.6) Other income, net 5.8 EBITDA from continuing operations 391.4 Special items, before tax 114.6 Interest expense included in special items (2.3) Depreciation and amortization included in special items (1.9) Adjusted EBITDA $ 501.8 3 AVNT Q1 2024 Earnings Presentation_For_Website_w_non-GAAP.pdf Avient corporation�first quarter 2024 results and 2024 financial guidance DISCLAIMER Slide Number 3 Regional demand trends-total company�Q1 Sales vs PY (Excluding FX) Slide Number 5 Slide Number 6 Slide Number 7 Slide Number 8 Slide Number 9 Slide Number 10 Slide Number 11 Slide Number 12 Slide Number 13 Slide Number 14 Slide Number 15 Slide Number 16 Slide Number 17 2023 segment, end market and Geography Color, Additives & Inks Specialty Engineered Materials Slide Number 21 IR Deck - AVNT-2024.03.31 5.06 11AM v2 (002).pdf Attachment

Business Number: 898451794 Mailing Address: Delivery Mode: GeneralDelivery Address Line 1: 17 Tideman Drive City, Province/Territory, Postal Code: Orangeville Ontario L9W3K3 Country: Canada Facility Name: Orangeville Plasticizer NAICS Code: 326198 NPRI ID: 2277 Physical Address: Address Line 1: 15 Tideman Drive City, Province/Territory, Postal Code: Orangeville Ontario L9W3K3 Country: Canada Latitude: 43.9133 Longitude: ­80.1158 Contact Type Technical Contact, Company Coordinator, Public Contact, Person who coordinated the preparation of the Toxics Reduction Plan Name: Brian Greer Position: EHS Manager Telephone: 5192150535 Email: brian.greer@polyone.com Contact Type Certifying Official Name: Darryl Chartrand Position: Senior Air Quality Technologist Telephone: 4164999000 about:/V003/Html http://www.canada.gc.ca/home.html http://www.servicecanada.gc.ca/eng/home.shtml http://www.canada.gc.ca/aboutgov-ausujetgouv/depts/menu-eng.html https://ec.ss.ec.gc.ca/auth/en/Services about:/V003/Logout_Deconnexion http://ec.gc.ca/default.asp? However, PolyOne Corporate staff and scientists continue research and development efforts to find technologically and economically viable substitutions that are consistent with clients and market specifications. However, PolyOne Corporate staff and scientists continue research and development efforts to find technologically and economically viable substitutions for PA compounds that are consistent with client and market specifications.

Potential markets include lighter-weight adventure gear for outdoor recreation, next-generation vehicles that go further using fewer energy resources, and recycled-content office furnishings that contribute to LEED certification for buildings. About Avient Avient Corporation (NYSE: AVNT), with 2021 revenues of $4.8 billion, provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world. Company Officers

Patterson, Chairman, President and Chief Executive Officer, Avient Corporation. We are optimistic we can host this meeting in person, but will make arrangements to do so by video if necessary,” said Jamie Beggs, Senior Vice President and Chief Financial Officer, Avient Corporation. For the same reasons, the Company is unable to address the probable significance of the unavailable information. 5 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.

Patterson, Chairman, President and Chief Executive Officer, Avient Corporation. We are excited to lay out our long-term growth plans, highlighting our sustainable solutions portfolio as well as provide an update on the synergies expected from the Clariant color business acquisition,” said Jamie Beggs, Senior Vice President and Chief Financial Officer, Avient Corporation. For the same reasons, the Company is unable to address the probable significance of the unavailable information. 6 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.