Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: • Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; • The effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; • Disruptions or inefficiencies in our supply chain, logistics, or operations; • Changes in laws and regulations in jurisdictions where we conduct business, including with respect to plastics and climate change; • Fluctuations in raw material prices, quality and supply, and in energy prices and supply; • Demand for our products and services; • Production outages or material costs associated with scheduled or unscheduled maintenance programs; • Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; • Our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; • Information systems failures and cyberattacks; • Amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; • Our ability to achieve strategic objectives and successfully integrate acquisitions, including the implementation of a cloud-based enterprise resource planning system, S/4HANA; • Other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation, geopolitical conflicts and any recessionary conditions; and • Other factors described in our Annual Report on Form 10-K for the year ended December 31, 2023 under Item 1A, “Risk Factors.” When showing constant dollar figures on GAAP and non-GAAP financial measures, the foreign exchange impact is calculated by using current foreign exchange rates and applying them to the prior period results. FX +4.6% FX -1.5% Total Avient +3.1% Note: Regional Sales Percentages exclude impact of foreign exchange Q2 2024 SEGMENT PERFORMANCE (COLOR, ADDITIVES & INKS) $525 $542 $94 $108 19.9% (in millions) (in millions) 7 17.9% +200 bps * Adjusted EBITDA Margin % • Organic sales growth in all regions led by Americas • Raw material deflation combined with cost reduction actions drove EBITDA margin expansion + 3% (+5% excluding FX) + 15% (+17% excluding FX) Q2 2024 SEGMENT PERFORMANCE (SPECIALTY ENGINEERED MATERIALS) $301 $308 $60 $64 20.6% (in millions) (in millions) 8 19.8% +80 bps * Adjusted EBITDA Margin % • Sales growth in consumer, healthcare and building & construction end markets offset by weaker demand in telecommunications • EBITDA margin expansion driven by positive end market mix as well as raw material deflation + 2% (+4% excluding FX) + 7% (+8% excluding FX) 2024 G U IDA N CE FY 2024 GUIDANCE Previous (May 7) Current Adjusted EBITDA $510 to $535 million $515 to $540 million Adjusted EPS $2.50 to $2.65 $2.55 to $2.70 Interest Expense $105 million $105 million Adjusted Effective Tax Rate 23% to 25% 23% to 25% Capital Expenditures ~$140 million ~$140 million 10 Q3 2024: Adjusted EPS of $0.62 11 Highlights • Provides performance updates on 2030 Sustainability Goals • Reduced company’s Scope 1 & 2 GHG emissions by 48% since 2019 • Highlights ESG performance ratings, certifications, and awards, including recent upgrades by Ecovadis to Gold and CDP to A- • Reflects Great Place to Work® culture focused on health, safety and employee engagement 2023 SUSTAINABILITY REPORT 11 Sustainability for a Better Tomorrow 2023 SUSTAINABILITY REPORT 12 • Investor Day to be held December 4, 2024 in New York, NY • The focus will be to do a deep dive on the Company’s strategy • Further details to be communicated 2024 AVIENT INVESTOR DAY AP P EN D IX 15 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% 17 (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 18 34% 21% 15% Building & 1% Energy COLOR, ADDITIVES & INKS 2023 REVENUE | $1 .1 B ILL ION 52% 35% 19 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) 20 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.

What is the normal liquid addition rate? Footprint (LxW cm) 86 x 80 Controller options 6000 Typical max. throughput (kg/hr) 120 Max. metering rate (cc/s) 1.25 Continuous use Yes Transfer pumps PC Metering pumps PC Interchangeable cassette Yes Note: PC = Progressing Cavity Pump Peri = Peristatic Pump PLANETPAK™ CONTAINERS The FlexCart system is designed to work with the standardized PlanetPak container range of packaging, achieving 99% reliable yield whilst at the same time achieving a sustainable packaging format in terms of full recyclability. The range of progressive cavity pump rates attainable can be used to determine the correct size of pump.

The manufacturer was struggling to find a replacement material with excellent chemical resistance and a high flame retardant rating. The results showed the Avient material outperformed typical FR PC/ABS and had an added bonus: a UL yellow card V0 flammability rating for all colors and some thicknesses.* Avient also used its custom color matching capabilities to provide pre-colored material that simplified molding, while the material’s wide processing window helped accommodate a variety of molding environments. * V0 @ 1.5 and 3.0mm FR PC/ABS failed 0% 20% 40% 60% 80% 100% 120% 140% Virex TB Clorox Broad Spectrum CaviCide SaniCloth Plus wipes FR PC/ABS failed FR PC/ABS failed FR PC/ABS failed FR PC / ABS (1.0% Strain) FR PC / ABS (1.5% Strain) Trilliant HC (1.0% strain) Trilliant HC (1.5% strain) FR PC/ABS failed 0% 20% 40% 60% 80% 100% 120% 140% Virex TB Clorox Broad Spectrum CaviCide SaniCloth Plus wipes FR PC/ABS failed FR PC/ABS failed FR PC/ABS failed FR PC / ABS (1.0% Strain) FR PC / ABS (1.5% Strain) Trilliant HC (1.0% strain) Trilliant HC (1.5% strain) TENSILE STRENGTH RETENTION AFTER 7 DAYS EXPOSURE Both materials were tested according to ASTM D543 for 7 days.

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Katar Bund Road, Off Multan Road Thokar Niaz Baig Lahore, Punjab 54500 Pakistan Activity: Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse and Activity: Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse and Page 7 of 10 Facility: Avient Colorants Sweden AB Järnyxegatan 7 Box 9053 Malmö 213 75 Sweden Facility: Avient Colorants Switzerland AG Rothausstrasse 61 Muttenz 4132 Switzerland Activity: Administration, Site management, Manufacture, Laboratory, Procurement, Sales, Maintenance, Infrastructure, Warehouse and Activity: Administration, Site management, Manufacture, Laboratory, Procurement, Maintenance, Infrastructure, Warehouse and Facility: Avient (Taiwan) Co.

Formulations available to meet ASTM E84 Class A and Class B flame/smoke rating

If a shipper elects to submit a dispute over the originally billing involving the applicability or reasonableness of the rate charges to the Surface Transportation Board for resolution, the Shipper must contest the billing by mailing or faxing a protest to the carrier within 180 days of the date it or its agent receives the original billing from the carrier.

Beggs continued, “In the first quarter, we expect to experience similar demand conditions as in the fourth quarter of 2022, driven by negative consumer sentiment, rising interest rates and a slow restart of China. Three Months Ended December 31, Year Ended December 31, Reconciliation to Consolidated Statements of Income 2022 2021 2022 2021 Sales $ 790.4 $ 807.1 $ 3,396.9 $ 3,315.5 Gross margin - GAAP 172.0 216.6 882.7 943.8 Special items in gross margin (Attachment 3) 45.5 5.9 81.1 33.6 Adjusted Gross margin $ 217.5 $ 222.5 $ 963.8 $ 977.4 Adjusted Gross margin as a percent of sales 27.5 % 27.6 % 28.4 % 29.5 % Operating income - GAAP 0.4 50.2 243.3 279.7 Special items in operating income (Attachment 3) 59.9 11.2 108.7 47.8 Adjusted Operating income $ 60.3 $ 61.4 $ 352.0 $ 327.5 Adjusted Operating income as a percent of sales 7.6 % 7.6 % 10.4 % 9.9 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures. Three Months Ended December 31, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results (Loss) income from continuing operations before income taxes $ (77.4) $ 104.3 $ 26.9 $ 27.4 $ 20.5 $ 47.9 Income tax benefit (expense) - GAAP 60.8 — 60.8 (17.1) — (17.1) Income tax impact of special items (Attachment 3) — (26.8) (26.8) — (4.1) (4.1) Tax adjustments (Attachment 3) — (39.2) (39.2) — 7.5 7.5 Income tax benefit (expense) $ 60.8 $ (66.0) $ (5.2) $ (17.1) $ 3.4 $ (13.7) Effective Tax Rate(1) 78.5 % 19.6 % 62.4 % 28.6 % (1) Rates may not recalculate from figures presented herein due to rounding 15 Year Ended December 31, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from continuing operations before income taxes $ 63.8 $ 194.0 $ 257.8 $ 203.5 $ 57.1 $ 260.6 Income tax benefit (expense) - GAAP 19.3 — 19.3 (51.9) — (51.9) Income tax impact of special items (Attachment 3) — (49.4) (49.4) — (13.0) (13.0) Tax adjustments (Attachment 3) — (28.4) (28.4) — 5.9 5.9 Income tax expense $ 19.3 $ (77.8) $ (58.5) $ (51.9) $ (7.1) $ (59.0) Effective Tax Rate(1) (30.2)% 22.7 % 25.5 % 22.7 % (1) Rates may not recalculate from figures presented herein due to rounding Three Months Ended Year Ended Reconciliation of Pro Forma Adjusted Earnings per Share December 31, 2022 Net (loss) income from continuing operations attributable to Avient shareholders $ (17.0) $ 82.8 Special items, after tax (Attachment 3) 38.3 116.2 Amortization expense, after-tax (Attachment 1) 14.6 49.0 Adjusted net income from continuing operations excluding special items 35.9 248.0 APM pro forma adjustments to net income from continuing operations* 2.5 13.6 APM amortization expense, after tax* — 19.1 Pro forma adjusted net income from continuing operations attributable to Avient shareholders $ 38.4 $ 280.7 Weighted average diluted shares 91.7 92.2 Pro forma adjusted EPS - excluding special items $ 0.42 $ 3.04 * Pro forma adjustment for January - August 2022 APM results (period before Avient ownership) including the impacts of debt financing and prepayments on net income from continuing operations.

Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; the effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks, including recessionary conditions; the current and potential future impact of the COVID-19 pandemic on our business, results of operations, financial position or cash flows; changes in polymer consumption growth rates and laws and regulations regarding plastics in jurisdictions where we conduct business; fluctuations in raw material prices, quality and supply, and in energy prices and supply; production outages or material costs associated with scheduled or unscheduled maintenance programs; unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; an inability to raise or sustain prices for products or services; our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; information systems failures and cyberattacks; amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; any material adverse changes in the Dyneema Business; our ability to achieve the strategic and other objectives relating to the Dyneema Acquisition, and the possible sale of the Distribution business segment; and other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation and any recessionary conditions. Three Months Ended June 30, Six Months Ended June 30, Reconciliation to Consolidated Statements of Income 2022 2021 2022 2021 Sales $ 1,302.4 $ 1,235.2 $ 2,596.2 $ 2,397.5 Gross margin - GAAP 303.8 288.7 597.5 591.1 Special items in gross margin (Attachment 3) (2.0) 12.6 3.8 10.4 Adjusted gross margin $ 301.8 $ 301.3 $ 601.3 $ 601.5 Adjusted gross margin as a percent of sales 23.3 % 24.4 % 23.2 % 25.1 % Operating income - GAAP 129.5 108.1 258.1 228.5 Special items in operating income (Attachment 3) 4.3 14.2 12.1 16.6 Adjusted operating income $ 133.8 $ 122.3 $ 270.2 $ 245.1 Adjusted operating income as a percent of sales 10.3 % 9.9 % 10.4 % 10.2 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures. Three Months Ended June 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from before income taxes $114.7 $ 3.4 $ 118.1 $ 89.8 $ 14.2 $ 104.0 Income tax expense - GAAP (30.0) — (30.0) (20.4) — (20.4) Income tax impact of special items (Attachment 3) — (0.8) (0.8) — (3.4) (3.4) Tax adjustments (Attachment 3) — 2.5 2.5 — 0.9 0.9 Income tax (expense) benefit $ (30.0) $ 1.7 $ (28.3) $ (20.4) $ (2.5) $ (22.9) Effective Tax Rate(1) 26.1 % 23.9 % 22.7 % 22.0 % (1) Rates may not recalculate from figures presented herein due to rounding 13 Six Months Ended June 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from before income taxes $225.8 $ 11.1 $ 236.9 $192.4 $ 16.6 $ 209.0 Income tax expense - GAAP (56.6) — (56.6) (43.3) — (43.3) Income tax impact of special items (Attachment 3) — (2.8) (2.8) — (4.3) (4.3) Tax adjustments (Attachment 3) — 4.0 4.0 — 2.0 2.0 Income tax (expense) benefit $ (56.6) $ 1.2 $ (55.4) $ (43.3) $ (2.3) $ (45.6) Effective Tax Rate(1) 25.0 % 23.4 % 22.5 % 21.8 % (1) Rates may not recalculate from figures presented herein due to rounding Reconciliation of EBITDA by Segment Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 Operating income: Color, Additives and Inks $ 93.6 $ 86.3 $ 188.1 $ 175.1 Specialty Engineered Materials 36.6 37.3 76.3 71.5 Distribution 27.1 23.7 51.3 47.7 Corporate and eliminations (27.8) (39.2) (57.6) (65.8) Operating income $ 129.5 $ 108.1 $ 258.1 $ 228.5 Items below OI in Corporate: Other income, net $ 1.4 $ 1.2 $ 0.8 $ 2.7 Depreciation & amortization: Color, Additives and Inks $ 25.9 $ 25.3 $ 51.9 $ 52.6 Specialty Engineered Materials 7.7 8.1 15.5 15.9 Distribution 0.2 0.2 0.4 0.4 Corporate and eliminations 2.7 0.2 6.5 2.0 Depreciation & Amortization $ 36.5 $ 33.8 $ 74.3 $ 70.9 EBITDA: Color, Additives and Inks $ 119.5 $ 111.6 $ 240.0 $ 227.7 Specialty Engineered Materials 44.3 45.4 91.8 87.4 Distribution 27.3 23.9 51.7 48.1 Corporate and eliminations (25.1) (39.0) (51.1) (63.8) Other income, net 1.4 1.2 $ 0.8 $ 2.7 EBITDA $ 167.4 $ 143.1 $ 333.2 $ 302.1 14 Three Months Ended June 30, Six Months Ended June 30, Reconciliation to EBITDA and Adjusted EBITDA: 2022 2021 2022 2021 Net income – GAAP $ 84.7 $ 69.4 $ 169.2 $ 149.1 Income tax expense 30.0 20.4 56.6 43.3 Interest expense 16.2 19.5 33.1 38.8 Depreciation and amortization 36.5 33.8 74.3 70.9 EBITDA $ 167.4 $ 143.1 $ 333.2 $ 302.1 Special items, before tax 3.4 14.2 11.1 16.6 Depreciation and amortization included in special items (1.1) 1.4 (3.2) 0.8 Adjusted EBITDA $ 169.7 $ 158.7 $ 341.1 $ 319.5 Three Months Ended June 30, 2021 Reconciliation to Condensed Consolidated Statements of $ EPS Net income attributable to Avient shareholders $ 68.8 $ 0.74 Special items, after tax (Attachment 3) 11.7 0.13 Adjusted net income / EPS - excluding special items 80.5 0.87 FX adjustment (4.9) (0.05) Adjusted net income / EPS - excluding special items, adjusted for FX $ 75.6 $ 0.82 NEWS RELEASE Attachment 1

IMPROVED BOTTLE QUALITY +2% in neck +3% in body -12% in base 8.5g 0.5L bottle, 60% rPET Re-optimization of Polymer Weight Distribution to Improve Bottle Strength Based on commercially produced water bottles, 51,000bph Mechanical Strength Based on PTI 14.4g 0.5L water bottles, Instron testing To p Lo ad (l bs Burst Pressure Based on 8.5g, 0.5L commercially produced water bottles Bu rs t P re ss ur e (B ar REDUCED CO2 EMISSIONS 25% reduction in energy consumed during the bottle blowing process, based on a commercial process producing 8.5g 0.5L water bottles at 51,000 bph En er gy k W Reduced Energy Consumption ColorMatrix AAzure increases the heat-up rate for preforms, enabling energy reductions for the heating lamps used during the bottle blowing process. Melt processing of ColorMatrix AAzure products is carried out at typical PET processing conditions at recommended dose rates, which range from 0.01% to 0.13%. Care must be taken to optimize the bottle blowing process due to the increased heat- up rate of the preform, to take advantage of the many benefits offered by this product range.