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Audit 2. Avon Lake, Ohio 2. Audit 2.

Dispute Reason Avient's reason for disputing the invoice 2 Column Description Actions Click on the Edit ( ) or Delete ( ) icon to edit or delete an invoice. Go to the Orders page or, on the Invoices page, click the Create Invoice from PO button above the table to go to the Orders page 2. Click on the Create Credit Note button above the Invoices table on the Invoices page or, on the Orders page, click on the Create Credit Note ( ) icon in the Actions column of the Purchase Orders table. 2.

WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: Page 2 of 7 Facility: Avient Corporation - Elk Grove, IL 2400 East Devon Avenue Elk Grove, IL 60007 Facility: Avient Corporation - Glendale, AZ 7601 North Glen Harbor Blvd. Rocky River Drive Berea, OH 44017 Facility: Avient Corporation - Assesse, Belgium (CAI & SEM) 2 Rue Melville Wilson Assesse 5330 Belgium Activity: Liquid Colorants and Additives for Plastics Activity: "Design of color concentrates, precolors, and compounds for fluoropolymer and high temperature polymers, LSFOH (low smoke and fume, zero halogen compounds), and Specialty Compounds Manufacture of Color and Additive Concentrates and Specialty Compounds" Page 6 of 7 Facility: Avient Corporation - Aland (Odkarby), Finland Kroklundsvagen 346 Ödkarby AX-22320 Finland Facility: Avient Corporation - Bethel, CT 19 Francis J Clark Circle Bethel, CT 06801 Activity: Manufacture of colorants and compounds for fluoropolymer and high temperature polymers Activity: Design and Manufacture of colorants and compounds for fluoropolymer and high temperature polymers. Ezcabarte calle H Nº3 Oricain, Navarra 31194 Facility: Avient Corporation - Tossiat, France 43 Place de la gare Tossiat 01250 France Activity: Design and Manufacture of Color and Additive Concentrates and Activity: Design and Manufacture of Color and Additive Concentrates and Page 7 of 7 Facility: Avient Corporation - Knowsley, United Kingdom Unity Grove Knowsley, Merseyside L349GT United Kingdom Facility: Avient Corporation - Alicante (Ibi - IQAP), Spain Guadalajara 6, Poligono Industrial L'Alfalç Ibi, Alicante 03440 Activity: Design and Manufacture of Liquid Colorants and Additives for Plastics, Assembly and Supply of Material Dosing Equipment Activity: Design, development and production of color concentrates and additives for plastic and synthetic fibers Facility: Avient Corporation - Vic (Barcelona), Spain Carretera de Vic a Olot,C-153, km 5 Masies de Roda, Barcelona 08500 Activity: Design, development and production of color concentrates and additives for plastic and synthetic fibers Facility: Avient Corporation - Melle, Germany Oldendorfer Straße 9 Thuringia 49342 Germany Facility: Avient Corporation - Gaggenau, Germany Adolf-Dambach-Str. 2 Gaggenau, Thuringia 76571 Germany Activity: Development and Manufacture of LSFOH (low smoke and fume, zero halogen) compounds Activity: Design and Manufacture of Specialty Engineered Thermoplastics

APPLICATION BULLETIN IMPROVED CHEMICAL RESISTANCE Engineered polyketone delivers excellent performance against aggressive chemicals, like H2SO4 for batteries (Figure 1), and performs similarly to nylon against typical chemicals tested in powersports, such as gasoline* (Figure 2). Gasoline - 30% glass-filled (GF) grade, dry as molded (DAM), room temperature Testing methodology is an adaptation from ASTM D543 • Reapply freshly soaked gauze pad every 24 hours to prevent from drying out • Repeat for a total of 72 hours • Tensile properties recorded *Chemical resistance data for DEET, motor oil, glass cleaner, and sunscreen available upon request KEY CHARACTERISTICS Figure 1 Figure 2 3.34 3.84 3.63 1.96 2.21 0.99 3.43 3.86 3.93 1.76 3.49 2.01 3.26 3.66 3.74 1.45 1.06 0.989 2.98 3.99 3.41 1.41 1.07 0.88 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 30% LGF PKE 30% LGF PA6 30% LGF PA66 30% SGF PKE 30% SGF PA6 30% SGF PA66 Ft -lb /in Notched Izod Impact ASTM D256 23C DAM 23C Conditioned -40C DAM -40C Conditioned 1.47 1.37 1.37 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 Glass-Filled PKE Glass-Filled PA6 Glass-Filled PA66 g/ cm 3 Density of Polyketone vs Nylon ASTM D792 LESS MOISTURE ABSORPTION THAN NYLON 30% Short Glass Fiber (SGF) Comparison Moisture uptake, environmental chamber 62% RH, 70°C SIMILAR DENSITY TO NYLON ASTM D792 COMPARABLE AND CONSISTENT IMPACT PERFORMANCE* Notched Izod Impact (ASTM D256) of LGF and SGF for DAM and Conditioned Materials *3,000 hr weathering data available upon request KEY CHARACTERISTICS 1.844.4AVIENT www.avient.com Copyright © 2024, Avient Corporation.

Purchasing, Customer Service, Logistics, Quality, Design and Sampling; Corporate HQ, Management of QMS 33587, Walker Road, Building 428 Avon Lake - OH 44012 United States Avon Lake, OH (SEM) Manufacture of Engineered Thermoplastics , 554 Moore Road Avon Lake - OH 44012 United States Aland (Odkarby), Finland Manufacture of colorants and compounds for fluoropolymer and high temperature polymers Kroklundsvagen 346 AX-22320 Ödkarby Finland Alicante (Ibi - IQAP), Spain Design, development and production of color concentrates and additives for plastic and synthetic fibers Guadalajara 6, Poligono Industrial L'Alfalç 03440 Ibi Assesse, Belgium (CAI & SEM) "Design of color concentrates, precolors, and compounds for fluoropolymer and high temperature polymers, LSFOH (low smoke and fume, zero halogen compounds), and Specialty Compounds Manufacture of Color and Additive Concentrates and Specialty Compounds" 2 Rue Melville Wilson 5330 Assesse Belgium Barbastro Design and Manufacture of Specialty Engineered Thermoplastics Pol. 19 Francis J Clark Circle Bethel - CT 06801 United Page 2 of 4 S E s Cergy, France Design and Manufacture of Color and Additive Concentrates and Specialty Compounds , 14 Avenue de l'Eguillette Saint Ouen l'Aumône - 95310 France Esenyurt, Turkey Design and Manufacture of Specialty Engineered Thermoplastics Orhangazi Mah. 1683 Sok. No:8 34538 Esenyurt Turkey Gaggenau, Germany Design and Manufacture of Specialty Engineered Thermoplastics Adolf-Dambach-Str. 2 76571 Gaggenau Germany Glendale, AZ Manufacture of Colorants for Plastics 7601, North Glen Harbor Blvd.

A range of standard and customized solutions conforming to UL 94 V-2, V-0 and 5VA performance ratings are available. KEY CHARACTERISTICS • UL 94 V-2, V-0, 5VA ratings and elevated RTI ratings • GWFI (IEC 60695-11-10) up to 960°C • Comparative Tracking Index (CTI) PLC 0, 600V ratings • Injection molding and extrusion grades • Non-halogen grades available • Low dielectric performance with selected formulations • Good recyclability • Colorable MARKETS & APPLICATIONS Applications that require flame retardant performance including: • Transportation: Interior components, seat components, door panels, aircraft interiors, railway interiors, boat interiors • Construction & Building Materials: Cable insulation, pipes and fittings, insulation materials • Consumer – Appliance casings, housings, covers, fume hoods, battery packages, furniture • Industrial Equipment: Machine housings • Energy, Electrical & Electronic, E-Mobility: Battery frames, electrical housings, connectors • Telecommunication: Cable management • Packaging: Transportation of sensitive goods • Healthcare: Medical device housings and components PRODUCT BULLETIN MAXXAM FR FLAME RETARDANT POLYOLEFIN FORMULATIONS Non-halogenated Halogenated PP Homopolymer Copolymer Homopolymer Copolymer Unit Unfilled Glass Fiber Mineral Unfilled Glass Fiber Mineral Unfilled Glass Fiber Mineral Unfilled Glass Fiber Mineral Characteristic Talcum Talcum Talcum Talcum Reinforcement Mass-% 0 5–30 5–30 0 20–30 5-20 0 5–30 5–20 0 5–30 5–20 Colorable – ++ ++ + ++ ++ + + + + + + + Density g/cm3 0,9–1,08 1,28–1,37 0,98–1,55 0,92–1,06 1,25–1,35 0,95–1,28 0,94–1,04 1,3–1,55 1,01–1,42 0,96–1,01 0,94–1,58 0,95–1,46 Tensile Strength MPa 25–30 30–70 25–35 16–22 40–65 15–25 25-–35 30–70 25–35 20–24 20–55 -25 E-Modulus (Tensile) MPa 1600–2500 2500–8200 2500–4000 800–1200 2000–8000 1600–3000 1300–2000 3000–8900 1900–3500 1000–1400 1200–7500 1500–3000 Izod Impact 23°C notched % 2,0–4,5 3,5–7,5 2,5–4,5 5–40 2,5–18 2,5–6 2,5–4,5 3,5–6,0 3,0–7,0 4,0–40 2,5–16 2,5–10 Max. Good chemical 1 IM: Injection Molding, EX: Extrusion, BM: Blow Molding 2 HS: Heat Stabilized, UV: UV Stablized, LM: Lasermarking.

Microsoft PowerPoint - AVNT June IR Conferences_6.1.2023 1130AM AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) J U N E 2 0 2 3 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. AVIENT OVERVIEW OUR VISION: Creating specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world 2023 Financial GuidanceCompany Overview 2022 Pro Forma Revenue By: 9,700 Employees 104 Manufacturing Sites 20,000+ Customers Key Highlights  Premier formulator of specialized and sustainable material solutions  Asset-light business model, with flexibility to adapt to customer needs  Best-in-class technology and service (140+ PhDs / 2,500+ patents)  History of transformation through successful M&A while consistently returning cash to shareholders  Poised for continued future growth in excess of GDP $3.4B Revenue $2.40 $530M Adjusted EBITDA 15.6% Adjusted EBITDA Margins $200M Free Cash Flow 2.9x Net Leverage Over $1B in share buybacks since 2011 Raised dividend for 12 consecutive years, a 16% CAGR since 2011 Geography Segment Industry U.S. & Canada 64% 36% Specialty Engineered Materials Color Additives and Inks 37% 9% 4% 4% Building & Energy Telecom 4 CREATING A WORLD-CLASS SUSTAINABLE ORGANIZATION 1. 6.5% annualized long term sales growth leveraging sustainable solutions, composites, healthcare and emerging regions 2. National Defense budget of $842 billion submitted to Congress in Q1 2023 • European NATO members annual defense spend expected to increase by up to 20%  Dyneema® is the world’s strongest fiber™  One of the highest strength to weight ratios of any material on Earth  Direct relationships with industry leading armor manufacturers  Resistant to most chemicals, UV, and moisture to handle any environment Avient Confidential 18 DEFENSE Source: US Department of Defense, defense.gov, NATO18 Source: TRANSPORTATION • Increased EPA regulations requiring improved fuel efficiency, enabled in part by lower-weight vehicles • Automakers preparing for 2/3 of U.S. vehicles to be 100% electric by 2032  Lightweight panels that establish both strength and stiffness resulting in decreased energy usage, lower emissions  Long-lasting Color applications to resist UV exposure, temperature fluctuations and exceed the stylistic requirements of global automakers 19 $130 $530 $0.60 $2.40 2023 GUIDANCE 20 Sales Adjusted EBITDA $845 $3,400 (in millions) (in millions) CASH FLOW / LEVERAGE 21 • Maintaining free cash flow and leverage guidance from February earnings call • IT investment to further integrate acquired businesses and capture operational efficiencies • Restructuring actions to streamline operations and improve profitability, primarily in Europe ($ millions) 2023E Cash Flow from Operating Activities 350$ Less: Run-Rate CapEx (110) CapEx for IT System Upgrade (25) CapEx for Restructuring (15) Total CapEx (150) Free Cash Flow 200$ Adjusted EBITDA 530$ Net Debt / Adjusted EBITDA 2.9x LONG-TERM REVENUE GROWTH DRIVERS Growth Drivers Long-Term Growth Rate Sustainable Solutions 8–12% Healthcare 8–10% Composites 10% Asia / LATAM 5% Other (GDP growth) 2–3% Avient 6.5% 22 Sustainable Solutions 32% Asia / LATAM Composites Other (GDP Growth) 39% • Virtual presentation to be held September 20, 2023 • The company will be conducting an investor-focused presentation around our sustainability solutions portfolio Avient Confidential 23 SUSTAINABILITY INVESTOR DAY 23 $340M $405M $455M $550M $790M $915M 2016 2017 2018 2019 2020PF** 2021 2022PF*** SUSTAINABILITY FOR A BETTER TOMORROW Revenue From Sustainable Solutions* 2016-2022 ($ in millions) Organic Future Growth Revenue Assumptions From Sustainable Solutions: 8 - 12% 24 *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) **2020 is Pro Forma to include full year of the Clariant Color business ***2022 is Pro Forma for the acquisition of Avient Protective Materials and the divestiture of Distribution $1,175M Lightweighting Eco-Conscious Recycle Solutions VOC Reduction Sustainable Infrastructure Human Health & Safety Reduced Energy Use Bio-polymers SUSTAINABILITY NEEDS BY MARKET B&C • Eco-Conscious • Carbon footprint • Resource conservation • Carbon footprint • Bio based content • Eco-Conscious Automotive • Light weighting • Recycled Content • VOC reduction • Recycle Solutions • Carbon Footprint Packaging • Recycle Solutions • Food waste reduction Common Theme: CO2 Emission Goals Increasing Single-Use Plastic Regulation 25 INVESTING IN INNOVATION S U S T A I N A B I L I T Y P O R T F O L I O 26 AP P EN D IX 29 RAW MATERIAL 2022 ANNUAL PURCHASES Performance Additives Pigments 12% TiO2 Dyestuffs 2% Polyethylene Nylon Polypropylene Styrenic Block Copolymer Other Raw Materials 33% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials • Cost inflation decelerating, particularly for hydrocarbon-based raw materials 2022 pro forma results for the acquisition of Avient Protective Materials SEGMENT DATA U.S. & Canada 37% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Building and END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) 9% 31 (1) Total company sales and adjusted EBITDA of $3,653M and $592M, respectively, include intercompany sales eliminations and corporate costs 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 34% 38% END MARKET REGION 32 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 52% 35% REGION 33 19% 8%Industrial 9% Defense Building & 32% 27% 14% Building & 3% 1% Defense 1% (18% of sales) 9% 2022 PROFORMA AVIENT REGIONAL SALES BY END MARKET 27% 14% 17% Building & (37% of sales)Transportation 12% Building & US & Canada (40% of sales) 56% 23% Building & 1% LATAM (5% of sales) 3% 34 PEER COMPARISONS AVIENT IS ASSET LIGHT Capex / Revenue 2023E (%) Avient Specialty Other Specialty / Note: Avient reflects 2023 estimated revenue of $3,400 and estimated run-rate CAPEX of $110M. 36 4 4 4 6 8 9 FREE CASH FLOW CONVERSION Note: Free cash flow conversion calculated as (Adjusted EBITDA – Capex) / Adjusted EBITDA.

Refer to Attachment 7 Reconciliation of Non-GAAP Financial Measures for details regarding adjustments to previously reported results to arrive to the pro forma financial metrics. 2 Webcast Details The company will host a webcast at 9:00 a.m. Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 74.2 $ 0.81 $ 6.4 $ 0.08 Special items, after tax (Attachment 3) (26.7) (0.29) 19.9 0.26 Adjusted net income / EPS - excluding special items $ 47.5 $ 0.52 $ 26.3 $ 0.34 (1) Per share amounts may not recalculate from figures presented herein due to rounding Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 132.0 $ 1.46 $ 75.5 $ 0.97 Special items, after tax (Attachment 3) 24.8 0.27 55.8 0.72 Adjusted net income / EPS - excluding special items $ 156.8 1.73 $ 131.3 1.69 (1) Per share amounts may not recalculate from figures presented herein due to rounding 6 Attachment 2 Condensed Consolidated Statements of Income (Unaudited) Three Months Ended Year Ended Sales $ 997.0 $ 658.6 $ 3,242.1 $ 2,862.7 Cost of sales 744.1 505.3 2,457.8 2,205.5 Gross margin 252.9 153.3 784.3 657.2 Selling and administrative expense 187.9 132.8 595.0 500.4 Operating income 65.0 20.5 189.3 156.8 Interest expense, net (19.3) (11.9) (74.6) (59.5) Other income, net 11.7 10.7 24.3 12.1 Income from continuing operations before income taxes 57.4 19.3 139.0 109.4 Income tax benefit (expense) 17.3 (12.9) (5.2) (33.7) Net income from continuing operations 74.7 6.4 133.8 75.7 Income (loss) from discontinued operations, net of income taxes 0.1 458.9 (0.4) 513.1 Net income 74.8 465.3 133.4 588.8 Net income attributable to noncontrolling interests (0.5) — (1.8) (0.2) Net income attributable to Avient common shareholders $ 74.3 $ 465.3 $ 131.6 $ 588.6 Earnings per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.81 $ 0.08 $ 1.47 $ 0.98 Discontinued operations — 5.97 (0.01) 6.64 Total $ 0.81 $ 6.05 $ 1.46 $ 7.62 Earnings per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.81 $ 0.08 $ 1.46 $ 0.97 Discontinued operations — 5.92 (0.01) 6.61 Total $ 0.81 $ 6.00 $ 1.45 $ 7.58 Cash dividends declared per share of common stock $ 0.2125 $ 0.2025 $ 0.8200 $ 0.7875 Weighted-average shares used to compute earnings per common share: Basic 91.4 76.9 90.1 77.2 Diluted 92.1 77.5 90.6 77.7 7 Attachment 3 Summary of Special Items (Unaudited) Special items (1) Three Months Ended Year Ended Cost of sales: Restructuring costs, including accelerated depreciation $ (1.8) $ — $ (4.3) $ 0.3 Environmental remediation costs (1.1) 0.3 (20.4) (10.1) Reimbursement of previously incurred environmental costs — 0.5 8.7 4.5 Inventory fair market value step-up expense 1.2 — (9.3) (2.0) Impact on cost of sales (1.7) 0.8 (25.3) (7.3) Selling and administrative expense: Restructuring, legal and other (13.0) (4.4) (22.5) (18.6) Acquisition earn-out adjustments 1.5 (15.7) (1.0) (36.4) Acquisition related costs (1.4) (5.3) (24.9) (9.4) Impact on selling and administrative expense (12.9) (25.4) (48.4) (64.4) Impact on operating income (14.6) (24.6) (73.7) (71.7) Costs related to committed financing in interest expense, net — — (10.1) — Other income, net 0.1 0.1 0.4 0.5 Pension settlement/curtailment gains and mark-to-market adjustment 10.3 9.5 17.2 9.5 Impact on income from continuing operations before income taxes (4.2) (15.0) (66.2) (61.7) Income tax benefit (expense) on above special items (1.3) (0.4) 14.1 11.1 Tax adjustments(2) 32.2 (4.5) 27.3 (5.2) Impact of special items on net income from continuing operations attributable to Avient Shareholders $ 26.7 $ (19.9) $ (24.8) $ (55.8) Diluted earnings per common share impact of special items on net income from continuing operations attributable to Avient shareholders $ 0.29 $ (0.26) $ (0.27) $ (0.72) Weighted average shares used to compute adjusted earnings per share: Diluted 92.1 77.5 90.6 77.7 (1) Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; settlement gains or losses and mark-to- market adjustments associated with actuarial gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results Reconciliation of Pro Forma Adjusted Earnings per Share: Three Months Ended Year Ended 2019 2020 2019 Net income from continuing operations attributable to Avient shareholders $ 6.4 $ 132.0 $ 75.5 Special items, after tax (Attachment 3) 19.9 24.8 55.8 Adjusted net income from continuing operations excluding special items 26.3 156.8 131.3 Clariant MB pro forma adjustments to net income from continuing operations(2) 1.6 20.7 30.4 Pro forma adjusted net income from continuing operations attributable to Avient shareholders $ 27.9 $ 177.5 $ 161.7 Weighted average diluted shares 77.5 90.6 77.7 Pro forma impact to diluted shares from January 2020 equity offering 15.3 1.5 15.3 Pro forma weighted average diluted shares 92.8 92.1 93.0 Pro forma adjusted EPS - excluding special items pro forma for Clariant MB acquisition $ 0.30 $ 1.93 $ 1.74 (2) Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects to the financing for the acquisition December 31, 2020 Sales $ 3,242.1 Clariant MB pro forma adjustment to sales(2) 540.4 Pro forma sales $ 3,782.5 (2) Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects to the financing for the acquisition 13

Zone 2 - Center 430° F 470° F 221° C 243° C Zone 3 - Front 440° F 480° F 227° C 249° C Nozzle 450° F 480° F 232° C 249° C MELT & MOLD TEMPERATURES ENGLISH (°F) METRIC (°C) COMMENTS Melt Temperature 450° F 480° F 232° C 249° C After processing, always purge residual PKE materials with fractional melt flow HDPE or PP.Mold Temperature 150° F 200° F 66° C 93° C DRYING CONDITIONS ENGLISH (°F) METRIC (°C) COMMENTS Temperature 180° F 82° C Drying not required. Duration 2–3 Hours Moisture Level Allowable N/A Notes These preliminary guidelines are based on lab results.