VersaflexTM PF Versaflex PF VOC Versaflex PF VERSAFLEX PF VOC 39 LDPE / 13 Versaflex PF VERSAFLEX PF 39 LDPE / 13 Versaflex PF N / 2 5 m m N / 2 5 m m F = 25 ° C 7 I = 25 ° C 20 MD6741 / MD6700 VERSAFLEX PF TM +86 021 60284888 www.avient.com VERSAFLEX™ PF 1 CF6751 PP 2 2420K LDPE Versaflex™ PF MD6727 Versaflex™ PF MD6741 Versaflex™ CF 6751 Versaflex™ PF MD6649 Versaflex™ PF 9512 Versaflex™ CF 8888N-A Versaflex™ PF MD6666 Versaflex™ PF MD6748 Versaflex™ PF MD6700 Versaflex™ CF 9000 PP PVC Tg (°C) -26 -43 -30 -26 -5 1 -6 0 5 / (Shore A) 50 49 35 37 38 35 37 31 30 19 MFI (190°C, 2.16kg) (g/10min) / / / 15 5 15 20 3 5 27 MFI (230°C, 2.16kg) 8 20 8 / / / / / / / 1 LDPE 2420k2/LDPE 2420k/Versaflex™ =4.5/4.5/1 ; =50um (N/25mm) 25°C 20 1.3 1.8 7.9 2.5 2.2 2.7 3.3 3.0 3.7 4.3 75°C 7 5.7 2.9 7.2 3.1 4.0 4.3 4.3 5.5 5.6 / PMMA (N/25mm) 25°C 20 1.8 2.0 7.2 2.6 2.8 3.0 3.6 3.3 3.9 4.9 75°C 7 5.5 4.7 7.1 3.5 / 4.7 6.5 5.8 6.9 /

EDGETEK™ POLYETHERETHERKETONE (PEEK) HIGH PERFORMING MELT-PROCESSABLE POLYMER PRODUCT SELECTION GUIDE Edgetek™ Polyetheretherketone (PEEK) HIGH PERFORMING MELT-PROCESSABLE POLYMER PROPERTY CONDITIONS TEST METHOD UNITS EDGETEK ™ ET9800-0001 EM EDGETEK™ ET9800-0002 RS EDGETEK™ ET9800-0003 RS EDGETEK™ ET9800-0004 RS EC LUBRIONE™ LB9800-0001 AR PHYSICAL Mold Shrinkage - Transverse – ASTM D955 in/in 0.014 0.010 0.011 0.009 0.014 MECHANICAL Tensile Strength - Yield – ASTM D638 PSI 14425 15640 23680 36500 19700 Tensile Elongation - Yield – ASTM D638 % 5.4 3.0 2.2 1.5 0.2 Tensile Elongation - Break – ASTM D638 % 19.5 3.1 2.2 1.5 1.9 Tensile Modulus – ASTM D638 PSI 555150 827700 1591300 5301000 2285600 Flexural Modulus – ASTM D790 PSI 529300 690700 1418300 3084300 1443400 Flexural Strength – ASTM D790 PSI 23500 27300 36000 52100 30300 IMPACT Izod, Notched – ASTM D256 ft-lbs/in 1.0 0.7 1.1 1.3 0.6 Izod, Unnotched – ASTM D256 ft-lbs/in N.B. 13.1 15.3 13.8 5.0 THERMAL Melting Point – – °C 343 343 343 343 343 Glass Transition (DSC) – – °C 143 143 143 143 143 Heat Deflection Temp 264 psi, Unannealed ASTM D648 °C 151 178 320 325 > 300 CLTE, Flow Direction 23°C to 140°C ASTM E831 cm/cm/°C 4.0E-05 5.5E-05 2.2E-05 7.0E-06 1.9E-05 CLTE, Flow Direction 140°C to 250°C ASTM E831 cm/cm/°C 9.7E-05 7.8E-05 2.3E-05 6.5E-06 2.2E-05 Polyetheretherketone (PEEK) is widely considered to be one of the highest performing melt-processable polymers in the industry.

GUIDANCE ( T O TA L C O M PA N Y ) 6 $845 $846 Guidance Actual $125 $134 Guidance Actual Sales Adjusted EBITDA (in millions) $0.55 $0.63 Guidance Actual Adjusted EPS (in millions) Q1 2023 PERFORMANCE VS. Avient Specialty Formulators Other Specialty / Chemical Companies 2023E(%) 32 79 87 83 81 76 73 90 79 77 76 73 69 60 22 A vi e n t K W R P P G F U L A V Y R P M F M C C E H X L A S H E C L H U N E M N S C L M U LT I P L E E X PA N S I O N Avient Specialty Formulators Other Specialty / Chemical Companies Source: Peer data per Bloomberg as of April 28, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $530M and closing share price of $38.51. Avient 2011 and 2018 valuations reflect trailing 12 months EBITDA at December 31 of the respective years. 33 EV / 2023E EBITDA Historic Multiple 6.5 8.3 9.9 14.6 13.7 13.0 11.9 8.8 18.7 17.4 11.8 10.0 9.7 9.1 8.0 7.9 A vi e n t (2 0 1 1 ) A vi e n t (2 0 1 8 ) A vi e n t (2 0 2 3 ) K W R P P G R P M A V Y F U L E C L H X L F M C A S H S C L C E E M N H U N 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.

Investor Day P O L Y O N E I N V E S T O R P R E S E N T A T I O N M A R C H 2 0 1 8 F O R W A R D L O O K I N G S T A T E M E N T S PolyOne Corporation 2 In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. V I S I O N PolyOne Corporation 4 To be the world’s premier provider of specialized polymer materials, services and solutions C O R E V A L U E S P E R S O N A L V A L U E S Honesty IntegrityRespect Specialization Commercial Excellence Operational Excellence Globalization Collaboration ExcellenceInnovation To be the world’s premier provider of specialized polymer materials, services and solutions PolyOne Corporation 5 P O L Y O N E 2 0 1 7 R E V E N U E | $ 3 . 2 B I L L I O N Transportation 18% Industrial 16% Consumer 12% Packaging 11% Healthcare 11% Wire & Cable 9% Appliance 5% United States 59% Europe 14% Asia 10% Latin America 9% Canada 8% PolyOne Distribution 34% Performance Products & Solutions 21% Specialty Engineered Materials 19% Color Additives & Inks 26% Segment End Market Geography Building & Construction 12% Electrical & Electronics 6% 2009 2010 2011 2012 2013 2014 2015 2016* 2017* A D J U S T E D E P S E X P A N S I O N C O N S E C U T I V E Y E A R S PolyOne Corporation 6 8 $0.13 $0.68 $0.82 $1.00 $1.31 $1.80 $1.96 $2.06 $2.21 *Pro Forma for sale of DSS E A R L Y Y E A R S D E F I N E D B Y S P E C I A L T Y M I X I M P R O V E M E N T PolyOne Corporation 7 2% 76% 2005 2017 $5M $280M + 25% + 33% Specialty OI % of Operating Income Consistently Deliver Double Digit Annual EPS Growth *ROIC is defined as TTM adjusted OI after tax divided by the sum of average debt and equity less cash over a 5 quarter period PolyOne Corporation 8 2006 2017 2020 “Where we were” “Where we are” Platinum Vision ROIC* 5.0% 14.0% 15.0% Operating Income % of Sales Color, Additives & Inks 1.7% 15.5% 20%+ Specialty Engineered Materials 1.1% 12.5% 20%+ Performance Products & Solutions 5.5% 10.7% 12-14% Distribution 2.6% 6.3% 6.5-7.5% P R O O F O F P E R F O R M A N C E & P L A T I N U M V I S I O N 531 660130 149 504 607 2014 2017 R&D / Technical Marketing Sales I N V E S T M E N T I N C O M M E R C I A L R E S O U R C E S D R I V I N G G R O W T H PolyOne Corporation 9 Increased commercial headcount Largest organic revenue growth since recession $2.9 $2.9 $3.2 2015 2016 2017 Revenue in billions of $ + 24% + 15% + 20% Total + 10% Organic + 7% Free Cash Flow (In millions) ROIC* PolyOne Corporation 10 $50 $116 $143 $0 $40 $80 $120 $160 $200 2012 2014 2016 2018 10.8% 11.3% 12.9% 14.0% 10.0% 11.0% 12.0% 13.0% 14.0% 15.0% 2012 2014 2016 2017 2020 Platinum Vision $200 - $220 F R E E C A S H F L O W A N D I M P R O V I N G R E T U R N S *ROIC is defined as TTM adjusted OI after tax divided by the sum of average debt and equity less cash over a 5 quarter period 15.0% $767M R E T U R N I N G C A S H T O S H A R E H O L D E R S O V E R $ 9 5 0 M I L L I O N S I N C E 2 0 1 1 PolyOne Corporation 11 $0 $150 $300 $450 $600 $750 2011 2012 2013 2014 2015 2016 2017 $0.16 $0.20 $0.24 $0.32 $0.40 $0.48 $0.58 $0.70 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 3-Year Dividend Plan Cumulative Share Repurchases (In millions) Increasing Annual Dividend Transformational Opportunity for Growth Through M&A Adjacent Opportunity for Growth Through New Product Pipeline Core Customization 3 H O R I Z O N S O F D E V E L O P M E N T PolyOne Corporation 12 Incremental development from existing base of technology New development adjacent to current technology New technology development outside of and with our current base Service adjacent markets and customers Create new markets, target new customer needs Service existing markets and customers Market Technical I N N O V A T I O N Non-Halogen Flame Retardants Barrier Technologies Fiber Colorants Advanced Composites Thermoplastic Elastomers Gordon Composites/ Polystrand – Composites GLS – Thermoplastic Elastomers ColorMatrix – Liquid Color & Additives I N N O V A T I O N P I P E L I N E PolyOne Corporation 13 PrototypeFrame Opportunity Scale-up & Test Market Build Business Case Commercial Launch (since 2015) Phase 1 Phase 2 Phase 3 Phase 4 Phase 5 8 6 8 2 2 36 5 10 13 10 4 6 7 Breakthrough Platform Derivative Number of Projects 33 17 20 15 5 90 Total Addressable Market ($ millions) - - $800 $1,400 $600 $2,800 F L A M E R E T A R D A N T P O L Y M E R S A D V A N C E D C O M P O S I T E S B A R R I E R M A T E R I A L S C O L O R A N T T E C H N O L O G I E S T H E R M O P L A S T I C E L A S T O M E R S A U N I Q U E C U S T O M E R E X P E R I E N C E Industrial Design I Q D E S I G N L A B S PolyOne Corporation 14 Launched in 2014, IQ Design Labs is our in-house industrial design team that focuses on material selection and processing expertise to help with problem solving, enabling our clients to develop higher performance products. Material & Color Expertise Manufacturing Expertise 2014 2017 3 to 14 industrial designers $0 to $7M new business revenue $4M to $40M opportunities identified L S S C U S T O M E R F I R S T PolyOne Corporation 15 Customer Projects Cumulative LSS Projects Enables sales growth by building more intimate customer relationships, giving us insight to customers’ needs, with a service that is not easily replicated 2014 2017 2 85 PolyOne Corporation 16 W H Y I N V E S T I N P O L Y O N E ?

LUBRIONE™ INTERNALLY LUBRICATED FORMULATIONS PRODUCT SELECTION GUIDE PRODUCT DESCRIPTION UNITS TEST METHOD NN–000/15T BLACK NN–20GF– 10GB/13T–2S BLACK NN–30GF/10T WHITE LB8900-0001 30GF/15T NATURAL LB8900-0002 30GF/13T-2S NATURAL LB8900-0003 18T-2S NATURAL ATT–000/5T BLACK AT–000/18T– 2S NATURAL 5209 FPL 20 NATURAL PS–30GF/2S NATURAL LB5210–0237 1B NATURAL PC–10CF/15T BLACK Base Polymer PA 66 PA 66 PA 66 PK PK PK POM POM POM PBT PP PC General Properties Specific Gravity g/cm3 ASTM D792 1.23 1.46 1.47 1.56 1.55 1.33 1.38 1.47 1.51 1.54 1.13 1.31 Molding Shrinkage ASTM D955 Flow % 1.0–2.0 0.20–0.50 0.50–1.0 0.30–0.60 0.20–0.40 1.7–2.3 1.5–2.0 2.0–3.0 2.0–3.0 0.20–0.40 0.10–0.30 0.10–0.30 Water Absoprtion (23°C, 24 hr.) % ASTM D570 0.8 – 0.050–1.0 0.3 0.4 0.4 0.050 – 0.050 – – – Mechanical Properties Tensile Modulus(1) MPa ASTM D638 2650 9650 9790 8050 7380 1250 965 1770 2420 8620 4140 – Tensile Strength(1) (Yield) MPa ASTM D638 61.4 119 122 119 94 47 35 40 45 108 72.4 90 Tensile Elongation(1) (Break) % ASTM D638 3.0–5.0 1.0–3.0 1.5 3 2 35 40 30 26 3 – – Flexural Modulus MPa ASTM D790 2760 6890 6890 7380 6410 1300 1080 1740 1790 6690 4840 5500 Flexural Strength MPa ASTM D790 108 172 214 182 167 55 41.4 62.7 68.3 165 110 130 Coefficient of Friction ASTM D1894 vs. Steel – Static 0.25 0.46 0.18 0.15 0.12 0.19 0.11 0.14 0.13 0.24 0.17 0.17 Impact Notched Izod Impact (23°C, 3.18 mm, Injection Molded) J/m ASTM D256A 41 64(6) 110 107 107 70 80 37 37 75 – 69 Thermal Properties Heat Deflection Temperature ASTM D648 0.45 MPa °C 215(6) – 250 215 216 184 152 151(6) 153(6) 218(6) – – 1.8 MPa °C 65(6) 239(7) 244(6) 210 210 75 94 81.1(6) 88 197(6) – 135(5) Electrical Properties Surface Resistivity ohms/sq ASTM D254 – – – 1.30x1012 1.9x1012 5.2x1012 – – – – – 1.0x109 Dielectric Strength (Short Time) kV/mm – – 8.5 – – – – – – – – – Flammability Flame Rating Class UL 94 HB – – HB HB HB – HB – – – – LubriOne™ Internally Lubricated Formulations NOTES (1) Type I, 5.1mm/min (2) Type I, 21.3 mm/min (3) Type I, 50 mm/min (4) Type I, 5.1mm/min, Break (5) 3.2 mm thick, Unannealed (6) 6.35 mm thick, Unannealed (7) 3.2 mm thick, Annealed PRODUCT DESCRIPTION UNITS TEST METHOD LB6000- 5024 RS HI Natural LB6000- 5021 RS S1 Black LB6000- 5021 RS X2 Black LB6000- 5019 X1 Black LB6700- 5001 RS AF Black NN- 000/01M Black SO REC LB6600- 5030 RS Grey LB3300- 5010 RS Natural LB3300- 5005 RS Natural REC LB3220- 5001 RS C Natural X1 LB8900- 5010 GP Grey LB8900- 5006 RS PE Natural LB8900- 5004 RS PE Natural LB4200- 5022 Black LB4200- 5023 Natural Base Polymer PA 6 PA6/PA66 PA66 PBT PC PKE POM Lubricant UHMWPE1 UHMWPE UHMWPE UHMWPE UHMWPE MoS22 Graphite UHMWPE UHMWPE UHMWPE Graphite UHMWPE UHMWPE MoS2 UHMWPE Filler type GF10 GF30 GF30 GF50 GF50 Unfilled GF33 GF20 MI20 GF10 Unfilled GF20 GF30 Unfilled Unfilled General Properties Specific Gravity g/cm3 ISO 1183 1.18 1.35 1.39 1.55 1.58 1.14 1.44 1.42 1.46 1.23 1.26 1.34 1.43 1.4 1.35 Mechanical Properties Tensile Modulus (23°C) MPa ISO 527-1 4250 9500 9000 15500 16600 3500 10600 6300 3330 4000 1630 5300 9250 2470 2150 Tensile Strength (Yield, 23°C) MPa ISO-527-2 97 150 160 205 200 85 164 102 55 60 60 108 99.1 55 50 Tensile Elongation (Break, 23°C) % ISO-527-2 12 2.5 3 2.7 2.4 3.4 2.0 4.2 8 2.5 46 3.7 1.5 11 11 Flexural Strength (23°C) MPa ISO 178 103 – – 285 265 108 215 127 78 85 38 155 117 73 68 Flexural Modulus (23°C) MPa ISO 178 3250 – – 12400 11100 2690 9000 4700 3000 3100 1380 4600 5450 2210 2070 Impact Charpy Notched Impact Strength (23°C, Injection Molded) kJ/m^2 ISO 179 14 12 10 15 10 3 6 7.7 4.3 12 15 10 7.6 8 5 Charpy Unnotched Impact Strength (23°C, Injection Molded) kJ/m^2 ISO 179 82 55 61 75 60 65 50 47 69 - NB 63 36 NB NB Thermal Properties Deflection Temperature Under Load 1.8 Mpa, Unannealed °C ISO 75-2/A 107 – – 204 – 73 235 – – – 90 210 204 86 80 Cofficient of Friction (CoF) & Wear Rate CoF vs.

W H AT W E D O : M AT E R I A L S C I E N C E 4 CUSTOM FORMULATION We sell solutions not commodities. C O - C R E AT I O N D is t. ) K W R P P G A V Y F U L R P M G C P H X L F M C H U N IF F E C L A S H K R A E M N C E S C L A L B Median: 5%Median: 3% Source: Peer data per Bloomberg market data as of July 28, 2021 Avient reflects 2021 estimated revenue of $4,650M and excludes one-time synergy capture CAPEX ($20M) Avient Specialty Formulators Other Chemical/Specialty Companies Free Cash Flow Conversion (1) 2021E (%) Being asset light helps us to generate strong free cash flow that is in line with specialty formulators.

Certificate of Registration 9001:2015 MSP 9001:2015–MSP-ANAB-US (2.0) Page 1 of 2 Certificate of Registration of Quality Management System to ISO 9001:2015 The National Standards Authority of Ireland certifies that: Colorant Chromatics Ab Kroklundsvagen 346 AX-22 320 Odkarby Aland Finland has been assessed and deemed to comply with the requirements of the above standard in respect of the scope of operations given below: The Design, Manufacture and Sales of Fluoropolymer Color Concentrates and Compounds Additional sites covered under this multi-site certification are listed on the Annex (File No. 19.2540/C) Approved by: Geraldine LarkinChief Executive Officer Approved by: Lisa Greenleaf Operations Manager Registration Number: 19.2540/C Certification Granted: May 15, 1997 Effective Date: Oct 20, 2018 Expiry Date: Oct 19, 2021 National Standards Authority of Ireland, 20 Trafalgar Square, Nashua, New Hampshire, NH 03063, USA T +1 603 882 4412 9001:2015–MSP-ANAB-US (2.0) Page 2 of 2 Annex to Certificate Number: 19.2540/C Scope of Registration: The Design, Manufacture and Sales of Fluoropolymer Color Concentrates and Compounds Activity Location Central Management Group, Design, Manufacture Colorant Chromatics Kroklundsvagen 346 AX-22 320 Odkarby Aland Finland File No.: 19.2540/C Headquarters, Sales, Distribution Colorant Chromatics Europe B.V.

TECHNICAL PROPERTIES(1) TEST METHOD Edgetek™ ET8900-0011 HI UV NAT Edgetek™ ET8900-0012 HI UV White Edgetek™ ET8900-0013 HI UV Black Physical Density/Specific Gravity ASTM D792 1.13 g/cm3 1.15 g/cm3 1.13 g/cm3 Molding Shrinkage - Flow ASTM D955 1.4–2% 1.4–2% 1.4–2% Mechanical Tensile Strength (Yield) ASTM D638 5,900 psi 5,800 psi 5,800 psi Tensile Modulus(2) ASTM D638 169,000 psi 161,087 psi 176,000 psi Flexural Modulus(3) ASTM D790 187,000 psi 190,985 psi 188,000 psi Impact Notched Izod Impact 73°F (23°C), 0.125 in ASTM D256A 17.3 ft-lb/in 16.5 ft-lb/in 16.5 ft-lb/in Notched Izod Impact -22°F (-30°C), 0.125 in ASTM D256A 3.2 ft-lb/in 3.0 ft-lb/in 3.3 ft-lb/in Thermal (HDT) 66 psi (0.45 MPa), 0.125 in ASTM D648 121°C 135°C 129°C NORTH AMERICA GRADES (1) Data based on single lot of lab generated samples.

TECHNICAL BULLETIN 1.844.4AVIENT www.avient.com PROPERTY TEST METHOD UNITS VERSAFLEX ™ CE 3130-80N VERSAFLEX™ CE 3130-70N Shore Hardness ASTM D2240 Shore A 79 69 Specific Gravity ASTM D792 g/cm3 1.08 1.04 Tensile Strength ASTM D412 psi 2,484 2,222 Melting Flow Index (190°C, 21.6kg) ASTM D1238 g/10min 5.2 4.4 Elongation ASTM D412 % 864 667 Flexural Modulus @ 300% ASTM D790 psi 975 855 Viscosity @ 11,170 sec, 200°C ASTM D3835 Pa.s 30.6 22.2 Abrasion (Mass Lost) ASTM D3389 mg 1.1 2.6 UV Resistance 0.68W/m 2 45°C 168hours — Good Good Stain Resistance *Condition 1*Condition 2 — Excellent Excellent Blooming 85% RH30°C,168 hours — Non Non Processing (Demold) — — Excellent Good Cycle Time — — Short Middle Overmold Substrate — — PC/ABS PC/ABS KEY PROPERTIES AND OVERMOLD PERFORMANCE Copyright © 2021, Avient Corporation. Condition 2: Sunblock and hand cream stand on the surface for 24 hours at 50°C, then removed to observe the surface performance. UV Resistance Test - 0.68W/m2 @ 45°C expose 168 hours Anti-abrasion Test - H18 wheel load 1kg @ 500 cycles Surface/Non-blooming - Visual observation Touch Feel - Hand touch Mechanical Properties - Refer to hardness, gravity, tensile strength, elongation, MFI, and flexural modulus, which are tested using ASTM methods Processing - Demold speed & cycle time TEST RESULTS Comprehensively, the Versaflex CE 3130 non-blooming series performed better than competitive materials in balancing functional properties and processing.

W H AT W E D O : M AT E R I A L S C I E N C E 4 CUSTOM FORMULATION We sell solutions not commodities. D is t. ) K W R R P M P P G A V Y F U L G C P IF F H X L F M C F O E H U N E C L K R A E M N A S H C E S C L G R A A L B Median: 5%Median: 3% Source: Peer data per Bloomberg market data as of April 27, 2021 Avient reflects 2021 estimated revenue of $4,300M and excludes one-time synergy capture CAPEX ($20M) Avient Specialty Formulators Other Chemical/Specialty Companies Free Cash Flow Conversion (1) 2021E (%) Being asset light helps us to generate strong free cash flow that is in line with specialty formulators. Free cash flow conversion calculated as (EBITDA – Capex) / EBITDA Median: 84% Median: 77% H I G H F R E E C A S H F L OW C O N V E R S I O N Avient reflects 2021 estimated EBITDA of $560M and excludes one-time synergy capture CAPEX ($20M) Source: Peer data per Bloomberg market data as of April 27, 2021 87 89 87 86 82 81 76 88 87 84 82 81 78 77 77 77 76 73 70 69 50 19 A vi e n t K W R P P G R P M A V Y F U L G C P F M C IF F H X L U N V R E C L A S H C E B N R F O E E M N G R A H U N K R A S C L A L B Source: Peer data per Bloomberg market data as of April 27, 2021 Total Enterprise Value / 2021E EBITDA Our current valuation with updated guidance implies an EBITDA multiple that is below specialty formulator peers and the majority of our chemical peers.