Mariana Langiewicza 50, 95- 050 Konstantynow, Poland Avient Corporation - Korachi, Sindh Pakistan Design and Manufacture of Colour and Additive Concentrates, 1-A/1, Sector-20 , 74900 Korachi, Pakistan Avient Corporation Design and Manufacture of colour and additive concentrates, thermoplastic resins and specialty compounds Hohenrhein 1 Lahnstein Rheinland- Pfalz 5612 Germany Avient Corporation Design & Manufacturing of Colour and Additive Concentrates. Toluca 2000 Toluca Estado de México 50200 Mexico Page 4 of 5 Avient Corporation Design & Manufacture of Color, Additive Concentrate & Specialty Renaissance Industrial & Warehousing Complex, Unit No. Unit 3 Dodworth Business Park, Dodworth Barnsley South Yorkshire S75 3SP United Kingdom Page 5 of 5

Director since: 2011 Age: 68 Current Public Company • None Current Non-Public Company • X-Energy Reactor Company, LLC • Engine No. 1 Former Directorships: • Enbridge Inc Sanders — 2,354 (1) 188,287 (1) 376,574 (1) — — — — — — — — — — — — — — — — — — — — — — — 4/29/2024 — — — — — 20,000 (5) — 866,000 — 4,068(1) 325,408 (1) 650,816 (1) — — — — — — 26,875 (2) 215,000 (2) 430,000 (2) — — — — — 2/22/2024 — — — 6,867 (3) 20,600 (3) — 39.27 254,580 2/22/2024 — — — — — 6,400 (6) — 251,328 M.A. Balance at 12/31/2023(1) in Last FY(2) Registrant in Last FY(3) Earnings in Last FY(4) Withdrawals/ Distributions Balance at Last FYE(1)(5) A.K.

695712 PLUM ABS 4 X HC3070-001-1 7 Blue 292C BLUE 485-3403-1

Microsoft PowerPoint - AVNT M11 Investor Presentation AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) N OV E M B E R 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. 3 AVIENT OVERVIEW 2023 Financial ResultsCompany Overview Revenue By: 9,300 Employees 102 Manufacturing Sites 20,000+ Customers  Innovating materials and processing solutions to solve our customers’ challenges while enabling a sustainable world  Broad portfolio of technologies with market leading positions and flexibility to anticipate and meet customer needs  Focus is on organic revenue growth and margin expansion, following our successful portfolio transformation $3.14B Revenue $2.36 Adjusted EPS $502M Adjusted EBITDA 16.0% Adjusted EBITDA Margins $186M Adjusted Free Cash Flow U.S. & Canada 64% Specialty Engineered Materials Color Additives and Inks 41% 23% 19% 10% 5% 4% Building & Energy Telecom Geography Segment Industry 2024 Financial Guidance $525 to $530 million Adjusted EBITDA $2.63 to $2.67 Adjusted EPS 4 Industry Sustainability Standards ESG Ratings Performance 1 4 87th 94th percentile Avient CDP Score: A- SUSTAINABILITY PERFORMANCE AND RECOGNITION O CTO BE R 3 1 , 2024 W EB CAS T P RE SE N TATI O N 6 Q3 2024 HIGHLIGHTS • 8.5% organic sales growth driven by broad-based growth across all regions and most end markets in both CAI and SEM segments • Growth stemmed from gaining share, winning new product specifications and restocking in certain end markets • Both segments expanded YoY EBITDA margins by 40 bps each • Adjusted EPS of $0.65, an increase of 14% vs the prior year • Successfully refinanced $650M outstanding senior notes due 2025; extending maturity to 2031 • Increased dividend 5% to $1.08 on an annualized basis; 14th consecutive increase Adj. EBITDA $130 million +6% (+7% ex FX)Net Sales $815 million +8% (+8.5% ex FX) Net Sales $815 million +8% (+8.5% ex FX) Q 3 2024 R ES U LT S TOTAL COMPANY $754 $815 $123 $130 (in millions) $0.57 (in millions) Adjusted EBITDA Adjusted EPS 8 + 8% (+8.5% excluding FX) + 6% (+7% excluding FX) + 14% (+16% excluding FX) Sales 9 Q3 2024 RESULTS – ORGANIC REVENUE GROWTH BY REGION VS PY 9 +9% +5% +11% +27% Avient ex.

The following table identifies the principal facilities of our segments: Performance Products and Solutions Global Specialty Engineered Materials Global Color, Additives and Inks PolyOne Distribution Designed Structures and 1.Long Beach, 1.McHenry, Illinois 1.Glendale, Arizona 1.Rancho Cucamonga, 1.Arlington, Texas (4) California 2.Avon Lake, Ohio 2.Kennesaw, Georgia California 2.Evanston, Illinois (4) 2.Terre Haute, Indiana Dyersburg, Suwanee, 2.Chicago, Illinois 3.Cape Girardeau, 3.Louisville, Kentucky Tennessee (1) Georgia (3) 3.Eagan, Minnesota Missouri (4) 4.Avon Lake, Ohio 3.North Haven, 3.Elk Grove Village, 4.Edison, New Jersey 4.Goodyear, Arizona (4) 5.Clinton, Tennessee Connecticut Illinois 5.Statesville, North 5.Greenville, Ohio (4) 6.Dyersburg, Seabrook, Texas (1) 4.St. Portage, 14.Donora, Plants) 18.Pune, India Wisconsin (4) (6) Pennsylvania (4) 19.Pamplona, Spain 16.Ripon, Wisconsin (4) Cape Girardeau, 20.Bangkok, Thailand 17.Salisbury, Missouri (1) (4) 21.Pudong (Shanghai), Maryland (4) 15.Ramos Arizpe, China 18.Sheboygan Falls, Mexico (4) 22.Jeddah, Wisconsin (4) (15 Manufacturing Saudi Arabia (5) 19.Stamford, Plants) Shenzhen, China (1) Connecticut (4) 23.Tianjin, China 20.Warsaw, Indiana (4) 24.Novo Hamburgo, 21.Wichita, Kansas (4) Brazil 22.Grandby, Canada (4) 25.Berea, Ohio Ramos Arizpe, 26.Richland Hills, Texas Mexico (4) 27.Bethel, Connecticut (22 Manufacturing 28.Barberton, Ohio Plants) 29.Knowsley, United Kingdom 30.Eindhoven, Netherlands 31.Suzhou, China 32.Shanghai, China 33.Itupeva, Brazil 34.Odkarby, Finland Manitowoc, Wisconsin (1) (4) (34 Manufacturing Plants) (1) Facility is not included in manufacturing plants total as it is also included as part of another segment. (2) There are two manufacturing plants located at Suzhou, China. (3) Facility is not included in manufacturing plants total as it is a design center/lab. (4) Facility added in connection with the acquisition of Spartech on March 13, 2013. (5) Facility added in connection with the JE.A. Committees: 1, 4 Retired Senior Vice President and Chief Financial Officer, Eastman Chemical Company Committees: 1, 4 Retired Chairman and Chief Executive Officer, National Starch and Chemical Company Committees: 2, 3* Executive Vice President, Global Strategy, Monsanto Company Committees: 2, 3 President and Chief Executive Officer, QualHealth, LLC Committees: 2, 4 President and Chief Executive Officer, Carpenter Technology Corporation Committee: 2 COMMITTEES 1.

RECYCLABILITY METHOD-1 • Preforms were produced by dosing 0.09% of Avient Fortis Amber-1 and 4% of our nylon- based oxygen scavenger Amosorb SolO2-2 • Preforms were ground down to a coarse granule size (~2mm) using a Retsch mill L* a* b* 1st Mould* 36.3 23.4 54.0 2nd Mould 39.3 24.3 53.0 3rd Mould 39.4 24.4 47.0 4th Mould 39.8 24.2 42.1 5th Mould 40.4 22.8 40.4 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 0 1 2 3 4 5 6 Melt Histories L* a* b* MELT HISTORIES For each melt history, a picture of the respective plaques was also taken and is reported in the figure below. Bottle A is the original bottle with 100% virgin material and a combination of Amosorb SolO2-2 at 4% with Fortis Amber-1 at 0.09% LDR.

Microsoft PowerPoint - AVNT Q3 2024 Earnings Presentation_10.29_12PM AVIENT CORPORATION T H I R D 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) O C T O B E R 3 1 , 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. EBITDA $130 million +6% (+7% ex FX)Net Sales $815 million +8% (+8.5% ex FX) Net Sales $815 million +8% (+8.5% ex FX) Q 3 2024 R ES U LT S TOTAL COMPANY $754 $815 $123 $130 (in millions) $0.57 (in millions) Adjusted EBITDA Adjusted EPS 5 + 8% (+8.5% excluding FX) + 6% (+7% excluding FX) + 14% (+16% excluding FX) Sales 6 Q3 2024 RESULTS – ORGANIC REVENUE GROWTH BY REGION VS PY 6 +9% +5% +11% +27% Avient ex. FX +8.5% FX -0.4% Total Avient +8.1% Note: Regional Sales Percentages exclude impact of foreign exchange COLOR, ADDITIVES & INKS SEGMENT $487 $522 $89 $97 (in millions) (in millions) 7 + 7% (+8% excluding FX) + 9% (+11% excluding FX) 18.3% +40 bps *18.7% * * Adjusted EBITDA Margin % • Sales growth driven by winning new product specifications in consumer & packaging, strong underlying demand in healthcare and improving demand in building & construction • Favorable mix and raw material deflation contributed to EBITDA margin expansion SPECIALTY ENGINEERED MATERIALS SEGMENT $268 $295 $51 $57 (in millions) (in millions) 8 • Sales growth driven by restocking in healthcare & consumer end markets and strong underlying demand for composite applications used in building & construction, energy and defense end markets • Favorable mix contributed to EBITDA margin expansion + 10% (+10% excluding FX) + 12% (+13% excluding FX) 19.0% +40 bps *19.4% * * Adjusted EBITDA Margin % 2024 G U IDA N CE FY 2024 GUIDANCE Previous (Aug 6) Current Adjusted EPS $2.55 to $2.70 $2.63 to $2.67 Adjusted EBITDA $515 to $540 million $525 to $530 million Interest Expense $105 million $104 million Adjusted Effective Tax Rate 23% to 25% 23% to 25% Capital Expenditures & Investment in S/4 Hana ~$140 million ~$140 million 10 11 • Investor Day to be held December 4, 2024 at the NYSE, beginning at 10AM • The focus will be to do a deep dive on the Company’s strategy • Registration and microsite will be available in early November 2024 AVIENT INVESTOR DAY AP P EN D IX 18 Performance Additives 15% Pigments TiO2 Dyestuffs Polyethylene 10%Nylon Polypropylene Styrenic Block Copolymer Other Raw Materials 38% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials RAW MATERIAL BASKET SEGMENT DATA U.S. & Canada 41% 36% 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS 19% 23%Industrial Building and 7% END MARKET REVENUE $2,007M $358M $1,138M $224M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $502M$3,143M (1) 7% 20 (1) Total company sales and adjusted EBITDA of $3,143M and $502M, respectively, include intercompany sales eliminations and corporate costs 2023 REVENUE | $2 .0 B ILL ION 34% 37% 21% END MARKET REGION 21 34% 21% 15% Building & 1% Energy COLOR, ADDITIVES & INKS 2023 REVENUE | $1 .1 B ILL ION 52% 35% 22 6%Industrial 12% 10% Defense Building & END MARKET REGION SPECIALTY ENGINEERED MATERIALS 32% 26% Building & 6% 2% Defense 1% (18% of sales) 2023 AVIENT REGIONAL SALES 25% Building & (36% of sales)Transportation 22% Building & 12% 6% US & Canada (41% of sales) 59% 22% Building & LATAM (5% of sales) 23 BY END MARKET Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

PANTONE P160-1 C MORADO-PANTONE 0270 -4-1 (V2) SECCIÓN VIOLETA - PANTONE 0240-4-1 (V2)

X ET-16658-01-1 Blk G051349 PEC DARK GREEN 4:100 Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

RHC R-2.BLUE.50-1 TRIPLE A TONER 4 X DILUTED Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)