Fogging on plastics films is really not all that different than the fog that forms outside; it’s just that, on a plastic film, fog forms on a convenient hydrophobic surface—namely, the film.

Annual Report | 2024 2 STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company, LLC 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about Avient, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.avient.com or free of charge from: Investor Relations Avient Corporation 33587 Walker Road Avon Lake, Ohio 44012 Phone: 1-440-930-1000 ANNUAL MEETING The annual meeting of Avient will be held virtually via live webcast at 9:00 a.m.

Patterson President and Chief Executive Officer PolyOne Corporation Page 5 PolyOne Leadership Name Title Name Title Stephen D.

GL AS S/ EP OX Y TA B M AT ER IA L N O T AB BREAK Hammerhead with 5 lb/ft3 (80 kg/m3) 420 lbs 191 kg Hammerhead with 7 lb/ft3 (115 kg/m3) 2 in 370 lbs 168 kg Hammerhead with 8 lb/ft3 (135 kg/m3) 332 lbs 151 kg 984 lbs 446 kg Glass/Polyester with Balsa Core 1298 lbs 589 kg Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 501 lbs 227 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 839 lbs 381 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 1156 lbs 524 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - Crestomer 1152PA Adhesive NA 1530 lbs 694 kg Hammerhead with 8 lb/in3 (135 kg/m3) Core Density - Crestomer M1-30 Adhesive NA 1471 lbs 667 kg Mixed Conditions ADHESIVE DESCRIPTION ADHESIVE GRADE MANUFACTURER AVERAGE BOND STANDARD DEVIATION FAILURE MODE BEST ADHESION 2k Urethane 75421 LORD 2281 psi 15.73 MPa 184 psi 1.27 MPa Substrate Cohesive 2k Acrylic SA1-705 GRY1 ACRALOCK 2211 psi 15.24 MPa 78 psi 0.54 MPa Substrate 2k Acrylic Plexus MA420 ITW 2171 psi 14.97 MPa 262 psi 1.81 MPa Substrate 2k Acrylic SA10-05 Blk1 ACRALOCK 2102 psi 14.49 MPa 138 psi 0.95 MPa Substrate 2k Urethane 75451 LORD 2047 psi 14.11 MPa 68 psi 0.47 MPa Cohesive 2k Acrylic SA1-705 GRY 1:1 ACRALOCK 1966 psi 13.56 MPa 68 psi 0.47 MPa Substrate 2k Acrylic Scotch-Weld 8010 3M 1907 psi 13.15 MPa 61 psi 0.42 MPa Adhesive Cyanoacrylate Gorilla Glue Gorilla Glue 1885 psi 13.00 MPa 432 psi 2.98 MPa Cohesive 2k Acrylic Crestabond PP-04 Scott Bader 1873 psi 12.91 MPa 281 psi 1.94 MPa Substrate  2k Acrylic SA10-05 Blk 10:1 ACRALOCK 1779 psi 12.27 MPa 127 psi 0.88 MPa Cohesive 2k Urethane 75422 LORD 1716 psi 11.83 MPa 190 psi 1.31 MPa Cohesive Adhesive 2k Urethane 75452 LORD 1535 psi 10.58 MPa 98 psi 0.68 MPa Adhesive 2k Methacrylate PolyFuse Icon Containment 1610 psi 11.10 MPa 98 psi 0.68 MPa Adhesive INTERMEDIATE ADHESION 2k Acrylic FA10-05 Blk C010817 ACRALOCK 724 psi 4.99 MPa 58 psi 0.40 MPa Cohesive 2k Acrylic FA10-05 Blk1 ACRALOCK 722 psi 4.98 MPa 44 psi 0.30 MPa Cohesive 2k Epoxy Loctite Epoxy Instant Mix Loctite 508 psi 3.50 MPa 81 psi 0.56 MPa Adhesive 2k Epoxy Gorilla Epoxy Gorilla Glue 341 psi 2.35 MPa 198 psi 1.37 MPa Adhesive NOT RECOMMENDED  2k Epoxy Loctite Epoxy Marine Loctite 0 0 No bond ADHESIVE SELECTION Brand names of the adhesives are owned by the respective manufacturers.

Buyer shall not use Seller’s name or trademarks in any advertisements, product descriptions, packaging materials, websites, or any other promotional materials, except with the prior written consent of Seller. 17.

NAME Archery CAM Module Nymax™ PIR enhances durability in archery CAM module 

Buyer shall not use Seller’s name or trademarks, logos, trade names and any other intellectual property rights owned by Seller’s or other companies from Avient Corporation and its affiliates under any circumstances (including in any advertisements, product descriptions, packaging materials, websites, or any other promotional materials) without the prior written consent of Seller or other companies from Avient Corporation and its affiliates. None of the provisions of these Terms grants Buyer any express or implied rights or licenses with respect to such trademarks, logos, trade names and any other intellectual property rights owned by Seller’s or other companies from Avient Corporation and its affiliates other than those necessary to perform Buyer’s obligations under these Terms. 17.

It’s in this spirit that we joined legacy PolyOne and the Clariant Masterbatch business, two complementary businesses, and formed a new one that we’ve named Avient. Q 4 AN D FU LL Y EA R 2020 PE RF O RM AN CE $0.30 $0.52 Q4 2020 ORGANIC PERFORMANCE Sales $922 $997 +8% Operating Income EPS $58 $80 +38% +73% • Record 4th quarter sales, adjusted operating income and adjusted EPS performance • All segments delivered year-over-year sales and operating income growth, led by consumer and healthcare end markets • Clariant Masterbatch integration synergy capture ahead of schedule: $5 million realized in 2020 ($ in millions except EPS) (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Q4 2020 SEGMENT PERFORMANCE 10 Sales Operating Income $100 $100 $100 $922 $100 $100 $100 $997 Distribution CAI SEM Total 2019 2020 $178 $272 $490 $191 $305 $526 SEM Distribution CAI +8% +7% +7% +12% $5 $5 $5 $58 $5 $5 $5 $80 Avient CAI SEM Total $17 $19 $40 $18 $30 $58 Distribution SEM CAI +38% +45% +58% +6% (3) (3) (1) (2) (1) Total company sales include intercompany sales eliminations (2) Total company reflects adjusted operating income and includes corporate costs (3) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition 2020 HIGHLIGHTS 11 • Completed transformational Clariant Masterbatch acquisition and created new brand name Avient • Increased pro forma adjusted EPS 11% from $1.74 to $1.93 as an essential supplier during the pandemic and due to growth in demand for consumer applications • Specialty Engineered Materials delivered record operating income on gains from composites • Achieved record free cash flow, increased dividend for 10th year in a row and delevered from 3.5x to 2.7x net debt to pro forma adjusted EBITDA • Culture is everything: Certified as a Great Place to Work® $133 $150 23%8% 21% 2006 2020PF Avient Portfolio Transformation 22% 59% CLARIANT MASTERBATCH: TRANSFORMATIONAL ACQUISITION 12 Clariant MB EBITDA Growth Purchase Price Multiple 10.8 9.6 6.5 2019PF 2020PF 2020PF w/ Full Synergies • Acquisition of Clariant Masterbatch significantly expands presence in healthcare, packaging and consumer end markets • Strength of portfolio – 13% EBITDA growth as an essential supplier in COVID response and recovery • Acquisition completed on July 1, 2020 for $1.4 billion.

https://www.craftechind.com/standard-and-custom-parts-in-high-performance-plastics/ MARKETS & APPLICATIONS Meeting the Demands There’s a common thread linking different classes of high-performance thermoplastics; namely, the markets and highly demanding applications in which they are used.

The presentations will do a deep dive on the eight ways we approach sustainability, which include lightweighting, reduced energy use, sustainable infrastructure and human health & safety, to name a few.”