Avient acquired the Clariant Masterbatch business (CMB) on July 1, 2020 (the “Acquisition Date”). Operating Income $3,783 $4,100 (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Previous Guidance Current Guidance $3,783 $4,300 $308 $360 $308 $410 $1.93 $2.40 $1.93 $2.80 (1) (1)(1) (1)(1) (1) 12 BALANCE SHEET • Deleveraging to 1.9x net debt to adjusted EBITDA by the end of 2021 • Driven by record adjusted EBITDA performance and strong free cash flow generation from asset light business • Future cash deployment: M&A, opportunistic share repurchases and balance sheet / continued leverage reduction 3.5x 2.7x 1.9x Net Debt / Adjusted EBITDA ($ in millions) 2021E Adjusted EBITDA 560$ Free Cash Flow 275$ Total Debt 1,860 Less: Cash (800) Net Debt 1,060$ 2021E Net Debt / Adjusted EBITDA 1.9x (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition SUSTAINABILITY • Most recent Sustainability report substantially expanded disclosure on key environmental and social topics Reduce Scope 1 & 2 greenhouse gas emissions by 35%.

Data not dependent on company form 1. Tax number of the company 21/1. Company numbers 49/1.

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 Figure 1. Picture of plaques originally made from preforms containing Fortis Amber-1 and Amosorb Solo2-2.

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. Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com http://www.avient.com/news 7 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Sales $ 823.3 $ 818.0 $ 2,606.5 $ 2,508.5 Operating Income 40.6 52.8 242.9 229.6 Net (loss) income from continuing operations attributable to Avient shareholders (27.4) 33.7 99.8 143.3 Basic (loss) earnings per share from continuing operations attributable to Avient shareholders $ (0.30) $ 0.37 $ 1.09 $ 1.57 Diluted (loss) earnings per share from continuing operations attributable to Avient shareholders $ (0.30) $ 0.37 $ 1.08 $ 1.56 Senior management uses comparisons of adjusted net income attributable to Avient shareholders and diluted adjusted earnings per share (EPS) attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results. Three Months Ended September 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results (Loss) income from continuing operations before income taxes $ (29.0) $ 82.0 $ 53.0 $ 35.4 $ 19.9 $ 55.3 Income tax expense - GAAP 1.2 — 1.2 (2.0) — (2.0) Income tax impact of special items (Attachment 3) — (20.5) (20.5) — (4.6) (4.6) Tax adjustments (Attachment 3) — 6.8 6.8 — (3.6) (3.6) Income tax (expense) benefit $ 1.2 $ (13.7) $ (12.5) $ (2.0) $ (8.2) $ (10.2) Effective Tax Rate(1) 4.1 % 23.7 % 5.7 % 18.4 % (1) Rates may not recalculate from figures presented herein due to rounding 14 Nine Months Ended September 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from continuing operations before income taxes $141.2 $ 89.6 $ 230.8 $176.1 $ 36.5 $ 212.6 Income tax expense - GAAP (41.5) — (41.5) (32.1) — (32.1) Income tax impact of special items (Attachment 3) — (22.5) (22.5) — (8.9) (8.9) Tax adjustments (Attachment 3) — 10.8 10.8 — (1.6) (1.6) Income tax (expense) benefit $ (41.5) $ (11.7) $ (53.2) $ (32.1) $ (10.5) $ (42.6) Effective Tax Rate(1) 29.4 % 23.1 % 18.2 % 20.0 % (1) Rates may not recalculate from figures presented herein due to rounding Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to EBITDA and Adjusted EBITDA: 2022 2021 2022 2021 Net (loss) income from continuing operations – GAAP $ (27.8) $ 33.4 $ 99.7 $ 144.0 Income tax (benefit) expense (1.2) 2.0 41.5 32.1 Interest expense 37.3 19.0 70.4 57.8 Depreciation and amortization from continuing operations 39.8 36.6 113.7 107.1 EBITDA $ 48.1 $ 91.0 $ 325.3 $ 341.0 Special items, before tax 82.0 19.9 89.6 36.5 Interest expense included in special items (10.0) — (10.0) — Depreciation and amortization included in special items (0.8) (0.9) (4.0) (0.1) Adjusted EBITDA $ 119.3 $ 110.0 $ 400.9 $ 377.4 NEWS RELEASE Attachment 1

NIIF Plenas UBICACIÓN Dirección del domicilio principal: Aut Medellin Km 2.5 Via Parcelas 1 Km Municipio: Cota (Cundinamarca) Correo electrónico: andres.perez@clariant.com Teléfono comercial 1: 8773300 Teléfono comercial 2: No reportó. Dirección para notificación judicial: Aut Medellin Km 2.5 Via Parcelas 1 Km Municipio: Cota (Cundinamarca) Correo electrónico de notificación: esperanza.laserna@avient.com Teléfono para notificación 1: 8773300 Teléfono para notificación 2: No reportó. OBJETO SOCIAL Objeto Social: El objeto social de la sociedad será: 1.

Color, Additives and Inks – strategic drivers Digital for operational excellence Leadership, talent 1. Specialty Engineered Materials – strategic drivers Digital for operational excellence Leadership, talent 1. Share gains and geographic penetration Build new 10% PLUS CAGR 1.

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. WHAT WE DO: MATERIAL SCIENCE 5 CUSTOM FORMULATION FE BRUARY 1 5 , 2023 W EB CAS T Q4 2022 VS. Avient 2011 and 2018 valuations reflect trailing 12 months EBITDA at December 31 of the respective years. 32 EV / 2023E EBITDA Historic Multiple 6.5 8.3 10.0 15.6 13.9 13.7 12.8 9.5 18.0 17.5 12.3 10.2 9.7 8.8 8.4 5.9 (2 01 1) (2 01 8) RA W M AT ER IA L OVE RV IE W 34 RAW MATERIAL 2022 ANNUAL PURCHASES Performance Additives 16% Pigments TiO2 Dyestuffs 2% Polyethylene Nylon Polypropylene Styrenic Block Copolymer Other Raw Materials 30% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials Excludes Avient Protective Materials SEGMENT DATA U.S. & Canada 40% 37% 18% Latin America 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Building and END MARKET REVENUE (1) Total company adjusted EBITDA of $592M includes corporate costs $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M 36 C O L O R , A D D I T I V E S & I N K S 2022 REVENUE | $2 .4 B ILL ION US & Canada 34% 38% Latin America END MARKET REGION 37 34% 21% Building & 1% Energy 2% S P E C I A LT Y E N G I N E E R E D M AT E R I A L S 2022 PRO FORMA REVENUE | $1 .3 B ILL ION END MARKET US & Canada 52% 35% REGION 38 19% 8%Industrial 16% Building & 32% 27% 14% Building & 3% 1% Defense 1% (18% of sales) 2022 PROFORMA AVIENT REGIONAL SALES BY END MARKET 27% 14% 17% Building & (37% of sales)Transportation Building & US & Canada (40% of sales) 7% 56% 23% 7% Building & 1% LATAM (5% of sales) 3% 39

Contact us Raw Materials Transportation Company Facilities SCOPE 3 Raw Material 1 Raw Material 2 Raw Material 3 Electricity Steam SCOPE 2 SCOPE 1 PRODUCTS AVIENT PCF CALCULATOR PROCESS https://www.certipedia.com/quality_marks/0000084994?

By 2030, Avient will reduce Scope 1 & 2 greenhouse gas (GHG) emissions by 60% with 2019 as a baseline and achieve operational carbon neutrality by 2050 We are proud to have reached our original target of 35% in 2020 by reducing our Scope 1 & 2 GHG emissions by 37%

Kahler (16) Page 16 • Shifted sales compensation practices to drive value and margin expansion • Significantly upgraded and added sales, marketing, and From Volume to Value $2,622 $3,060 Sales ($ millions) 2006 2011PFadded sales, marketing, and technical resources • Expanded global cross-selling • Invested in training and tools 3.3% 6.8% Adjusted OI% ($ millions) 2006 2011PF 2006 2011PF Page 17 • Value pricing practices enabled by use of EVE tools • Shifting the basis of competition to specialization 1.5% 8.9% Specialty OI% Specialization Drives Margin Expansion 2006 2011PF 7.2% PPS OI% competition to specialization differentiates PolyOne as a value-added solutions provider • Redirecting our technology and marketing focus to the most attractive segments 2.6% 5.6% 2006 2011 POD OI% 5.5% 7.2% 2006 2011 2006 2011 2006 2011 Page 18 • Global key account management team focused on key markets and strategic OEMs • Drive growth in target markets through application development750 1,120 Total Commercial Employees 2007 – 2011 49% Increase Commercial Excellence – Recent Investments *Includes ColorMatrix through application development • Leverage breadth of solutions across all PolyOne platforms to identify innovative solutions for strategic OEMs and Tier 1 partners * 750 2007 2011 Sales Marketing R&D/Tech Page 19 5% 1% 0% 27% 2% 12% 4% Performance Dashboards Drive Execution 45% 26% 18% 5% 55% Page 20 53% Drivers of Customer Loyalty Customer Experience is Key to Customer Loyalty 53% Building Customer Loyalty n = 4,960 B2B customers of 24 companies Source: Corporate Executive Board Company and Brand Impact Product and Service Delivery Value-to- Price Ratio Customer Experience Page 21 • Continue to redirect our focus to more attractive segments and increase customer loyalty and retention • Leverage new commercial tools and investments to enable disciplined execution and accountability Critical Imperatives to enable disciplined execution and accountability • Position PolyOne as the differentiated value-added specialty solutions provider Drive improved mix in all segments and achieve margin and profitability growth Page 22 Page 23