Fiber-Line™ Swellcoat™ Water Blocking Yarns support 5G antennae, data centers, and backbone cable designs to prevent equipment damage and signal attenuation due to water ingression in the cables. The Solution To support the transition to molded-in-color (MIC) parts, the customer specified Avient’s metallic-effect Smartbatch™ FX masterbatch colorants for two PC/ABS side panels on the center console of a compact SUV. To ensure mutually beneficial and productive relationships, Avient also asks all suppliers to adhere to our safety procedures and security policies within our manufacturing plants, distribution centers, as well as our sales, regional, or corporate offices.

Fiber-Line™ Swellcoat™ Water Blocking Yarns support 5G antennae, data centers, and backbone cable designs to prevent equipment damage and signal attenuation due to water ingression in the cables. The Solution To support the transition to molded-in-color (MIC) parts, the customer specified Avient’s metallic-effect Smartbatch™ FX masterbatch colorants for two PC/ABS side panels on the center console of a compact SUV. To ensure mutually beneficial and productive relationships, Avient also asks all suppliers to adhere to our safety procedures and security policies within our manufacturing plants, distribution centers, as well as our sales, regional, or corporate offices.

Purchase price multiple rapidly declining on strength of business and synergy capture 10 $133 $205 2019PF 2021 10 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.1x 2019PF 2021 2021 w/ Full Synergies (1) (1) 11.9% 16.2% 2019PF 2021 EBITDA Margins (1) CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION ($ in millions) (1) Financial information is pro forma to include a full year of Clariant Color business ($ millions) Initial Synergy Estimate 2021 Synergy Realization Total Synergies Expected Administrative $ 18 $ 29 $ 40 Sourcing 24 20 24 Operational 18 5 21 Total Synergies $ 60 $ 54 $ 85 CLARIANT COLOR INTEGRATION & COST SYNERGIES UPDATE 11 • Integration going extremely well: synergy target increased to $85 million at December 9th Investor Day • Relentless focus on guiding principles of safety first, employee collaboration and exceeding customer expectations • Future revenue synergies are not part of these estimates and represent additional growth over the long term SUSTAINABILITY FOR A BETTER TOMORROW 12 • Revenue from sustainable solutions grew 16% in 2021 and expected to grow 8-12% in 2022 as our innovation efforts and collaboration with customers accelerates • Investments centered around innovation and global sustainability megatrends o Enabling a circular economy – Technologies that allow for increased use of post-consumer recycled (PCR) material and improve recyclability of plastics o Light-weighting – Composites and CAI applications to reduce weight and material requirements, which minimize energy and carbon emissions o Eco-Conscious – Health and human safety applications as well as Avient’s alternative materials to replace lead, PVC, halogens, BPA and other less eco-friendly options 12 *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 12 2016 2017 2018 2019 2020PF** 2021 $405M $455M $550M $790M Revenue From Sustainable Solutions* 2016-2021 $915M $340M PEOPLE C U L T U R E I S E V E R Y T H I N G Community Service 7x Safer than Industry Average World-Class Safety Leadership Development Over $16 million raised since 2010 Diversity & Inclusion 13 Q4 2020 $997 $80 Sustainable Solutions 23 12% 8 Healthcare 53 43% 9 Composites 7 22% 2 Growth in Asia / LATAM 14 10% 3 Other 118 23% 2 Sub-total $1,212 22% $104 Wage Inflation and Overtime (11) Other Supply Chain Costs (4) Synergies 9 Incentives, FX, Other Employee Costs (10) (13) Q4 2021 $1,202 21% $85 Q4 2021 SALES AND OPERATING INCOME (TOTAL COMPANY) 14 Sales Growth Rate Adjusted Operating Income$ millions Adjusted EBITDA Q4 EBITDA BRIDGE 15 Price increases more than offsets raw material and supply chain impacts Q4 2020 $ 118 Demand - $ millions CAI: Price / Mix 62 Inflation (45) SEM: Price / Mix 25 Inflation (20) Distribution: Price / Mix 114 Inflation (109) Net Price Benefit 27 Wage Inflation and Overtime (11) Other Supply Chain Costs (4) Synergies 9 Incentives, FX, Other Employee Costs (13) Q4 2021 $ 126    Transportation (5)$ Outdoor High Performance (3) Other 8 Total Demand - Q4 2021 SEGMENT PERFORMANCE 16 CAI $526 $581 Sales ($ in millions) SEM Distribution $58 $61 Operating Income + 11% + 6% $305 $425 Sales $18 $22 Operating Income + 39% + 22% (1) $191 $228 Sales $30 $29 Operating Income + 19% - 3% 2022 O U TLO O K REVENUE GROWTH DRIVERS Growth Drivers Long-Term Growth Rate 2022E Growth Rate Sustainable Solutions 8–12% 12% Healthcare 8–10% 10% Composites 10% 3% Asia / LATAM 5% 6% Other (GDP growth) 2–3% 2–3% Avient 6.5% 6% 18 Excluding Outdoor High Performance 13% (7.5% excl.

We also doubled the size of our Innovation Center in Shanghai, China to serve our customers in Asia even more effectively. Our product development and application reach is further enhanced by the capabilities of our Innovation Centers in the United States, Germany and China, which produce and evaluate prototype and sample parts to help assess end-use performance and guide product development. We operate research and development centers that support our commercial development activities and manufacturing operations.

We continue to complete and update Poison Control Center notifications associated with our European portfolio. The events included humanitarian aid collection, food and PC drives, holiday activities for children, and support for local shelters and community centers. We continue to complete and update Poison Control Center notifications associated with our European portfolio.

Base Resin ABS PA PBT PC PE PEEK PP PPS Barrel Temperatures °F (°C) Rear Zone 400–475 (200–250) 430–500 (220–260) 480–520 (250–270) 480–570 (250–300) 400–445 (200–230) 660–700 (350–475) 400–440 (200–225) 520–600 (270–300) Center Zone 410–480 (205–253) 440–510 (225–265) 483–522 (252–272) 500–580 (260–305) 410–455 (207–237) 670–710 (357–385) 410–450 (205–230) 550–610 (285–310) Front Zone 420–490 (210–257) 450–520 (230–270) 487–527 (254–274) 515–590 (267–310) 420–465 (213–243) 680–720 (363–400) 420–455 (215–235) 570–620 (300–320) Nozzle 425–500 (215–260) 460–530 (235–275) 490–530 (255–275) 530–600 (275–315) 430–475 (220–250) 700–730 (370–395) 430–460 (220–240) 610–620 (320–325) Melt Temperature 425–515 (215–270) 530–580 (276–300) 500–565 (260–300) 530–615 (275–325) 430–495 (220–260) 700–725 (370–385) 430–475 (220–250) 610–635 (320–335) Mold Temperature 140–200 (60–90) 150–200 (65–90) 140–250 (60–120) 160–240 (70–115) 80–140 (25–60) 300–400 (150–200) 80–140 (25–60) 190–300 (90–150) Drying Parameters 190 (90) 2–4 Hours 0.01%–0.15% 180 (80) 4–5 Hours 0.10%–0.20% 275 (135) 3–4 Hours 0.02%–0.04% 250 (125) 3–4 Hours 0.02% 160 (70) 2 Hours 300 (150) 3–4 Hours 0.10% 160 (70) 2 Hours 280 (135) 2–3 Hours 0.01%–0.20% Nozzle Type General Purpose Nylon or ReverseTaper General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose Injection Velocity1 2.0–5.0 in/sec; 50–125 mm/sec Injection Pressure 2,000–4,000 psi; 13,000–30,000 kpa Back Pressure 0–50 psi; 0–350 kpa Screw Speed 25–75 RPM Cushion 0.125"–0.250"; 3.175 mm–6.35 mm Screw Compression Ratio2 2.0:1–2.5:1 Design Guide 7 Base Resin ABS PA PBT PC PE PEEK PP PPS Barrel Temperatures °F (°C) Rear Zone 400–475 (200–250) 430–500 (220–260) 480–520 (250–270) 480–570 (250–300) 400–445 (200–230) 660–700 (350–475) 400–440 (200–225) 520–600 (270–300) Center Zone 410–480 (205–253) 440–510 (225–265) 483–522 (252–272) 500–580 (260–305) 410–455 (207–237) 670–710 (357–385) 410–450 (205–230) 550–610 (285–310) Front Zone 420–490 (210–257) 450–520 (230–270) 487–527 (254–274) 515–590 (267–310) 420–465 (213–243) 680–720 (363–400) 420–455 (215–235) 570–620 (300–320) Nozzle 425–500 (215–260) 460–530 (235–275) 490–530 (255–275) 530–600 (275–315) 430–475 (220–250) 700–730 (370–395) 430–460 (220–240) 610–620 (320–325) Melt Temperature 425–515 (215–270) 530–580 (276–300) 500–565 (260–300) 530–615 (275–325) 430–495 (220–260) 700–725 (370–385) 430–475 (220–250) 610–635 (320–335) Mold Temperature 140–200 (60–90) 150–200 (65–90) 140–250 (60–120) 160–240 (70–115) 80–140 (25–60) 300–400 (150–200) 80–140 (25–60) 190–300 (90–150) Drying Parameters 190 (90) 2–4 Hours 0.01%–0.15% 180 (80) 4–5 Hours 0.10%–0.20% 275 (135) 3–4 Hours 0.02%–0.04% 250 (125) 3–4 Hours 0.02% 160 (70) 2 Hours 300 (150) 3–4 Hours 0.10% 160 (70) 2 Hours 280 (135) 2–3 Hours 0.01%–0.20% Nozzle Type General Purpose Nylon or ReverseTaper General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose Injection Velocity1 2.0–5.0 in/sec; 50–125 mm/sec Injection Pressure 2,000–4,000 psi; 13,000–30,000 kpa Back Pressure 0–50 psi; 0–350 kpa Screw Speed 25–75 RPM Cushion 0.125"–0.250"; 3.175 mm–6.35 mm Screw Compression Ratio2 2.0:1–2.5:1 Comments 1.

Post-consumer recycled content as percentage of total plastic packaging volume, by weight ENABLING THE USE OF RECYCLED CONTENT T O P 5 G A P S T H A T W E A R E A D D R E S S I N G 2) DECONTAMINATION1) COLOR MANAGEMENT 3) MAINTAINING MECHANICAL PROPERTIES 4) MONO-MATERIAL CONSTRUCTION 5) CONSISTENT RECYCLED MATERIAL QUALITY 15 G U I D I N G B R A N D S T O W H A T I S P O S S I B L E CASE STUDY WITH BRAND OWNER Recycled ResinVirgin Resin 16 SUSTAINABILITY FOR A BETTER TOMORROW 17 • Revenue from sustainable solutions expected to grow 18% in 2021 as our innovation efforts and collaboration with customers continues to accelerate • Investments centered around innovation and global sustainability megatrends o Enabling a circular economy – Technologies that allow for increased use of post-consumer recycled (PCR) material and improve recyclability of plastics o Light-weighting – Composites and CAI applications to reduce weight and material requirements, which minimize energy and carbon emissions o Eco-Conscious – Health and human safety applications as well as Avient’s alternative materials to replace lead, PVC, halogens, BPA and other less eco-friendly options 17 *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 2016 2017 2018 2019 2020PF** 2021E $405M $455M $340M $550M $790M Revenue From Sustainable Solutions* 2016-2021 $930M 17 Q3 2020 $925 $74 Sustainable Solutions 35 19% 14 Healthcare 51 44% 10 Composites 13 39% 6 Growth in Asia / LATAM 14 11% 3 Other 177 39% 16 Sub-total $1,215 31% $123 Supply Chain Disruption Costs (19) COVID Response Applications (5) (3) FX Impact 10 2 Synergies 12 Incentives, Travel, Other Employee Costs (16) Q3 2021 $1,220 32% $99 Q3 2021 SALES AND OPERATING INCOME (TOTAL COMPANY) 18 Sales Growth Rate Adjusted Operating Income$ millions 19 Q3 2020 Q3 2021 (1) Financial information is presented on a constant currency basis (1) (44% of total revenue) (56% of total revenue) Q3 END MARKET SALES PERFORMANCE +20% +31% +40% +24% +46% +40% +14% +33% Energy Telecom Building & Construction Transportation Industrial Healthcare Packaging Consumer Q3 YEAR-OVER-YEAR EBITDA BRIDGE 20 • Demand driven by growth in sustainable solutions, healthcare and consumer applications • Price increases more than offsets raw material and supply chain impacts • Synergy capture on pace to achieve $50M in annual savings in 2021 Q3 2020 $ 111 Demand 29 Adjusted EBITDA$ millions CAI: Price / Mix 51 Inflation (37) SEM: Price / Mix 25 Inflation (22) Distribution: Price / Mix 108 Inflation (103) Net Price Benefit 22 Supply Chain Disruption Costs (19) COVID Response Applications (3) Synergies 12 Incentives, FX, Other (16) Q3 2021 $ 136     21 • Price increases have more than covered raw material and freight inflation impacts of $300M year- to-date compared to 2020 • Demand impact driven by Q3 seasonality for the business Q2 TO Q3 SEQUENTIAL EBITDA BRIDGE Q2 2021 $ 159 CAI: Price / Mix 17 Inflation (8) SEM: Price / Mix 6 Inflation (5) Distribution: Price / Mix 35 Inflation (35) Net Price Benefit 10 Supply Chain Disruption Costs (4) Demand / Seasonality (35) Other 6 Q3 2021 $ 136 Adjusted EBITDA$ millions     FU LL Y EA R 2021 O U T LO O K $308 $430 2020PF 2021E $1.93 $3.00 2020PF 2021E FULL YEAR GROWTH PROJECTIONS (TOTAL COMPANY) 23 Sales Adjusted Operating Income $3,783 $4,750 2020PF 2021E + 26% Adjusted EPS + 40% + 55% (in millions) (in millions) (1) Financial information is pro forma to include a full year of Clariant Color acquisition (1)(1)(1) $1.74 $1.93 $3.00 2019PF 2020PF 2021E $442 $457 $580 2019PF 2020PF 2021E FULL YEAR 2019 – 2021 GROWTH (TOTAL COMPANY) 24 Sales Adjusted EBITDA $3,981 $3,783 $4,750 2019PF 2020PF 2021E + 19% Adjusted EPS (1) Financial information is pro forma to include a full year of Clariant Color acquisition (1) (1) (in millions) (in millions) (1)(1) + 31% + 72% (1) (1) 0.1 0.1 0.2 0.5 0.6 0.7 0.8 0.9 0.9 1.0 1.0 11 12 13 14 15 16 17 18 19 20 21 40% 99% YTD 5 - YR 10 - YR 0.16 0.20 0.26 0.34 0.42 0.50 0.58 0.72 0.79 0.81 0.85 0.95 11 12 13 14 15 16 17 18 19 20 21 22 2.1x Q4 NET LEVERAGE ~$1Bn REPURCHASED OVER LAST 10 YEARS ~$450MM PAID OVER LAST 11 YEARS CREATING VALUE FOR SHAREHOLDERS 25 Share Performance Dividends Share Repurchases Deleveraging 3.5x 2.1x 2019PF 2021E Growing Dividend Cumulative Buybacks Net Leverage $B n $ p e r sh ar e Total Shareholder Return ~$4Bn MARKET CAP INCREASE OVER LAST 10 YEARS (1) Share performance includes reinvested dividends and is as of 10.25.2021 (2) Financial information is pro forma to include a full year of Clariant Color acquisition (1) (2) 494% SUSTAINABILITY REPORT Continuous ESG Improvement 26 • Updated 2030 Sustainability Goals • Further disclosure on key Environmental, Social, and Governance impacts • Joined U.N.

shall control the interpretation and enforcement of this Agreement, excepting the provisions of Ohio law respecting conflict of law. 20.4.2 For Goods or Services delivered/performed in Europe (including Russia and the former Soviet client states (but not the Czech Republic)) and Africa, Swiss Law of Contracts shall control the interpretation and enforcement of this Agreement, excepting provisions of Swiss law respecting conflict of law. 20.4.3 For Goods or Services delivered/performed in the Czech Republic, Czech Republic law shall control the interpretation and enforcement of this Agreement, excepting provisions of Czech Republic law respecting conflict of law. 20.4.4 For Goods or Services delivered/performed from a China entity Supplier to a Avient-China entity, China law shall control the interpretation and enforcement of this Agreement, excepting the provisions of China law respecting conflict of law. 20.4.5 For Goods or Services delivered/performed in the balance of Asia, Singapore Law shall control the interpretation and enforcement of this Agreement, excepting the provisions of Singapore law respecting conflict of law. 20.4.6 For Goods or Services delivered/performed in Central and South America the internal law of Brazil shall control the interpretation and enforcement of this Agreement, excepting the provisions of Brazil law respecting conflict of law. 20.5 Any dispute or controversy arising out of or in connection with this Agreement relating specifically to or arising out of a specific Delivery of Goods or performance of a Service hereunder shall, if not settled amicably by the parties, be submitted for resolution as follows: 20.5.1 For Goods or Services delivered/performed in North America and Mexico, the Ohio State and United States federal courts sitting in Summit County, Ohio, and each Party consents to exclusive jurisdiction in such courts and waives all objections to forum regardless of basis. 20.5.2 For Goods or Services delivered/performed in Europe (including Russia and the former Soviet client states) and Africa} binding arbitration before the World Intellectual Property Organization sitting in Geneva, Switzerland (unless local law mandates a different forum). 20.5.3 For Goods or Services delivered/performed in China by a Chinese supplier to a Chinese Avient entity the courts of China sitting in Shanghai. 20.5.4 For Goods or Services delivered/performed in the remainder of Asia the courts of Singapore. 20.5.5 For Goods or Services delivered/performed in Central and South America binding arbitration before The Arbitration and Mediation Avient Terms and Conditions of Purchase for Goods and/or Services Center of the Brazil-Canada Chamber of Commerce sitting in Sao Paulo. 20.6 Expiry, termination or cancellation of the Agreement shall not affect any right or obligation, which expressly or by its nature survives such expiry, termination or cancellation, including but not limited to representations, warranties, confidentiality obligations, intellectual property rights and accrued rights.

We operate research and development centers that support our commercial development activities and manufacturing operations. b) Facility is not included in manufacturing plants total as it is a design center/lab. d) Location also includes a design center/lab.

We launched two new Innovation Centers, facilities where we work directly with our customers in real-time to inspire and invent. We operate research and development centers that support our commercial development activities and manufacturing operations. Pictured (left to right) in the Center’s Color Formulation and Research Library is the PolyOne Board of Directors: J.